CN105553711A - Network architecture and method of realizing integration of ground, sea, aviation and space networks - Google Patents

本发明涉及一种实现陆、海、空、天网络一体化的网络体系架构和方法。该网络体系架构包括：核心网，包括地面核心网和空间核心网；接入网，包括地面接入网、海洋接入网、航空接入网和空间接入网；其中，所述接入网向所述核心网注册或更新信息，并且通过所述核心网与其它接入网进行通信。

The invention relates to a network system framework and method for realizing the integration of land, sea, air and sky networks. The network architecture includes: core network, including ground core network and space core network; access network, including ground access network, ocean access network, aviation access network and space access network; wherein, the access network Register or update information with the core network, and communicate with other access networks through the core network.

实现陆、海、空、天网络一体化的网络体系架构及方法Network architecture and method to realize the integration of land, sea, air and space networks

技术领域technical field

本发明涉及互联网技术领域，尤其涉及一种实现陆、海、空、天网络一体化的网络体系架构及方法。The present invention relates to the field of Internet technology, in particular to a network architecture and method for realizing the integration of land, sea, air and space networks.

背景技术Background technique

随着网络技术的不断发展和用户数量的持续增长，互联网早已成为当今世界上最大的信息共享平台，它是人们生活和工作必不可少的工具之一，也是各个行业继续创新的新支点。然而，现有互联网起源于二十世纪六十年代末，其设计初衷只为实现可信节点的端到端数据传输，无法满足当今人们对互联网的多元化需求，诸如安全性差、可扩展性差、可管可控性差、资源利用率低、能耗高等诸多弊端暴露无遗。如何设计能够满足当今乃至未来用户需求的下一代互联网是世界各国学者研究的热点问题之一。With the continuous development of network technology and the continuous growth of the number of users, the Internet has already become the largest information sharing platform in the world today. It is one of the indispensable tools for people's life and work, and it is also a new fulcrum for continuous innovation in various industries. However, the existing Internet originated in the late 1960s, and its original design was only to realize the end-to-end data transmission of trusted nodes, which cannot meet the diversified needs of people on the Internet today, such as poor security, poor scalability, Many disadvantages such as poor controllability, low resource utilization, and high energy consumption have been exposed. How to design the next-generation Internet that can meet the needs of current and future users is one of the hot issues studied by scholars all over the world.

造成现有互联网诸多严重弊端的本质原因在于其“三重绑定”特性，即“身份与位置绑定”、“资源与位置绑定”以及“控制与转发绑定”。围绕上述“三重绑定”分离的网络架构，即“身份与位置分离”网络架构、“资源与位置分离”网络架构、以及“控制与转发分离”网络架构层出不穷。The essential reason for many serious drawbacks of the existing Internet lies in its "triple binding" feature, namely "identity and location binding", "resource and location binding" and "control and forwarding binding". Network architectures centering on the above-mentioned "triple binding" separation, that is, "identity and location separation" network architecture, "resource and location separation" network architecture, and "control and forwarding separation" network architecture emerge in endlessly.

“身份与位置分离”架构：所谓的“身份与位置绑定”的问题是指IP(InternetProtocol)地址的二义性，即IP地址在传输层代表主机的身份信息，在网络层代表主机的位置信息。IP地址二义性是导致现有互联网移动性差、安全性差、可扩展性差等的本质原因。顾名思义，“身份与位置分离”的思想是指使用两个标识使主机身份信息与位置信息解耦，一个标识用于表示主机的身份，可以是不用于路由的IP地址、公钥的哈希值等；另一个标识用于表示用户的位置，即IP地址。“身份与位置分离”机制可以分为基于主机和网络的方案。基于主机的方案直接修改主机的协议栈，但对网络系统本身不做修改，如HIP(HostIdentityProtocol)、SHIM6。基于网络的方案则是通过专用路由器对数据包的地址进行修改、封装等操作，实现路由地址的变换，典型的方案有一体化标识网络、LISP(LocatorIdentitySeparationProtocol)、GSE等。“身份与位置分离”思想的提出有利于解决现有移动互联网可扩展性差、安全性差、不支持移动性、多家乡技术等弊端。"Identity and location separation" architecture: The so-called "identity and location binding" problem refers to the ambiguity of IP (Internet Protocol) addresses, that is, IP addresses represent the identity information of the host at the transport layer, and represent the location of the host at the network layer information. The ambiguity of IP addresses is the essential cause of poor mobility, poor security, and poor scalability of the existing Internet. As the name implies, the idea of "separation of identity and location" refers to the use of two identifiers to decouple host identity information from location information. One identifier is used to represent the identity of the host, which can be an IP address or a hash value of a public key that is not used for routing. etc.; another identifier is used to indicate the location of the user, namely the IP address. The "identity and location separation" mechanism can be divided into host-based and network-based schemes. Host-based solutions directly modify the protocol stack of the host, but do not modify the network system itself, such as HIP (Host Identity Protocol) and SHIM6. The network-based solution is to modify and encapsulate the address of the data packet through a dedicated router to realize the transformation of the routing address. Typical solutions include integrated identification network, LISP (Locator Identity Separation Protocol), GSE, etc. The idea of "separation of identity and location" is helpful to solve the disadvantages of the existing mobile Internet, such as poor scalability, poor security, no support for mobility, and multi-home technology.

“资源与位置分离”架构：互联网是基于端到端的通信，通信双方必须知道对方的实际位置，即IP地址才能建立传输通道并进行数据传输。服务资源虽然有自己独立的名字，如URL(UniformResourceLocator)，但其名字通常含有服务提供商信息，而服务提供商信息又通过域名系统DNS(DomainNameSystem)与IP地址一一绑定，最终造成资源与位置的绑定。事实上，对于大多互联网用户，他们更加关心服务资源本身而不是其位置，ICN(Information-CentricNetworking)的设计理念就在于使互联网用户直接检索他们所需要的信息，而不是信息所在的位置，无需考虑信息到位置的映射。ICN对服务内容直接命名，该服务名称与服务内容所处位置信息解耦，方便用户直接获取自己感兴趣的信息。同时，ICN引入网络缓存的概念，即路由器可根据缓存策略存储流经自身的服务内容，方便其它用户就近获取，提高网络传输效率。另外，ICN在安全性、移动性、多家乡技术等问题上更具优势。代表性的ICN实现有NDN(NamedDataNetworking)、DONA(Data-OrientedNetworkArchitecture)、NetInF(NetworkofInformation)、PURSUIT、COMET等。"Resource and location separation" architecture: The Internet is based on end-to-end communication. Both parties must know the actual location of the other party, that is, the IP address to establish a transmission channel and perform data transmission. Although the service resource has its own independent name, such as URL (UniformResourceLocator), its name usually contains service provider information, and the service provider information is bound to the IP address one by one through the domain name system DNS (DomainNameSystem). Location bindings. In fact, for most Internet users, they care more about the service resource itself than its location. The design concept of ICN (Information-Centric Networking) is to enable Internet users to directly retrieve the information they need, rather than the location of the information. Mapping of information to locations. ICN directly names the service content, and the service name is decoupled from the location information of the service content, so that users can directly obtain the information they are interested in. At the same time, ICN introduces the concept of network caching, that is, the router can store the service content flowing through itself according to the caching policy, so that other users can obtain it nearby and improve the network transmission efficiency. In addition, ICN has more advantages in issues such as security, mobility, and multi-home technology. Representative ICN implementations include NDN (Named Data Networking), DONA (Data-Oriented Network Architecture), NetInF (Network of Information), PURSUIT, COMET, etc.

“控制与转发分离”架构：现有互联网将控制平面和转发平面耦合在网络节点上，每个节点既负责路由选择的同时也操作数据转发。一方面，随着用户数量的爆炸式增长、网络应用的日益增多，越来越多的复杂功能被赋予到现有网络中，网络节点的性能、可扩展性等受到严重挑战；另一面，由于网络的控制层面被分布到各个节点上，这使得网络部署者难以对其进行高效管理，无法实现更为复杂的、面向需求的自定义功能，缺乏灵活性和扩展性，网络新技术更是无法部署。为适应网络新时代的发展需求，构造可持续发展的网络体系，“控制与转发”分离的思想逐渐受到广泛的关注。从早期的OpenSignaling、ActiveNetworking再到4D、Forces(FORwardingandControlElementSeparation)、Ethane以及如今的SDN(Software-DefinedNetworking)，学术界一直在不断的对该思想进行研究和实现，而SDN更是得到了产业界的支持和认可，这无疑给SDN的推广带来强有力的动力。SDN将转发平面集成到交换机上，控制层面部署在一个逻辑上集中式分布的实体上，使得控制器的可扩性问题成为其固有缺陷，这也是目前SDN研究的热点问题之一。"Separation of control and forwarding" architecture: The existing Internet couples the control plane and forwarding plane to network nodes, and each node is responsible for both routing and data forwarding. On the one hand, with the explosive growth of the number of users and the increasing number of network applications, more and more complex functions are given to the existing network, and the performance and scalability of network nodes are severely challenged; on the other hand, due to The control plane of the network is distributed to each node, which makes it difficult for network deployers to manage it efficiently and realize more complex and demand-oriented custom functions. It lacks flexibility and scalability, and new network technologies cannot deploy. In order to adapt to the development needs of the new network era and construct a sustainable network system, the idea of separation of "control and forwarding" has gradually attracted widespread attention. From the early OpenSignaling, ActiveNetworking to 4D, Forces (FORwarding and ControlElementSeparation), Ethane and today's SDN (Software-DefinedNetworking), the academic community has been continuously researching and implementing this idea, and SDN has been supported by the industry. And recognition, which will undoubtedly bring a strong impetus to the promotion of SDN. SDN integrates the forwarding plane into the switch, and the control plane is deployed on a logically centralized and distributed entity, which makes the scalability problem of the controller an inherent defect, which is also one of the hot issues in current SDN research.

由此可见，围绕上述“三重绑定”分离的网络架构研究已较为深入，但目前仍缺乏一个能够同时克服上述“三重绑定”的未来互联网架构，以从根本上解决现有互联网诸多严重弊端。It can be seen that the research on the network architecture surrounding the above-mentioned "triple binding" separation has been relatively in-depth, but there is still a lack of a future Internet architecture that can overcome the above-mentioned "triple binding" at the same time, so as to fundamentally solve many serious drawbacks of the existing Internet .

此外，随着卫星技术的不断发展和创新，卫星网络由于其广阔的覆盖能力越来越受到青睐，如何实现陆、海、空、天网络一体化也必将是未来网络的研究热点问题。In addition, with the continuous development and innovation of satellite technology, satellite networks are becoming more and more popular due to their broad coverage capabilities. How to realize the integration of land, sea, air, and space networks will also be a hot research issue in future networks.

发明内容Contents of the invention

本发明一方面提供一种实现陆、海、空、天网络一体化的网络体系架构，包括：One aspect of the present invention provides a network architecture that realizes the integration of land, sea, air, and space networks, including:

核心网，包括地面核心网和空间核心网；Core network, including ground core network and space core network;

接入网，包括地面接入网、海洋接入网、航空接入网和空间接入网；Access network, including terrestrial access network, ocean access network, aviation access network and space access network;

其中，所述接入网向所述核心网注册或更新信息，并且通过所述核心网与其它接入网进行通信。Wherein, the access network registers or updates information with the core network, and communicates with other access networks through the core network.

在一些实施例中，所述核心网和所述接入网均包括：In some embodiments, both the core network and the access network include:

网络管理系统，包括服务查询系统、位置映射系统以及资源管理系统；Network management system, including service query system, location mapping system and resource management system;

网络实体，包括用户、路由器和提供服务资源的服务器中的至少一个；network entities, including at least one of users, routers, and servers providing service resources;

其中所述网络实体向所属网络的网络管理系统注册或更新信息并按需向所述核心网的网络管理系统注册或更新信息，并且通过所述核心网与其它接入网内的网络实体进行通信。Wherein, the network entity registers or updates information with the network management system of the network to which it belongs and registers or updates information with the network management system of the core network as required, and communicates with network entities in other access networks through the core network .

在一些实施例中，每个网络实体包括身份标识和位置标识，身份标识用于表征网络实体本身，位置标识用于表征网络实体在网络中的位置，并且其中每个网络实体按需向所属网络及所述核心网的位置映射系统和资源管理系统注册或更新信息；In some embodiments, each network entity includes an identity identifier and a location identifier, the identity identifier is used to characterize the network entity itself, and the location identifier is used to characterize the position of the network entity in the network, and each network entity reports to the network to which it belongs and registration or update information of the location mapping system and resource management system of the core network;

其中，所述核心网和接入网均具有各自独立的各自独立的网络编号作为其身份标识，每个接入网和核心网的位置标识为其网络内连接其它网络的边界路由器的位置标识，边界路由器在相连的两个网络中均具有位置标识，其中所述身份标识用于表征该网络本身，所述位置标识用于表征该网络的位置；Wherein, the core network and the access network each have their own independent network number as their identity mark, and the position mark of each access network and core network is the position mark of the border router connected to other networks in the network, The border router has location identifiers in the two connected networks, wherein the identity identifier is used to represent the network itself, and the location identifier is used to represent the location of the network;

其中，所述位置映射系统负责维护其所属网络内所述网络实体身份标识与位置标识的绑定以及其它网络的身份标识与位置标识的绑定关系；并且Wherein, the location mapping system is responsible for maintaining the binding of the network entity identity and the location identifier in the network to which it belongs and the binding relationship between the identity identifier and the location identifier of other networks; and

其中，所述资源管理系统负责统一管理和调度网络资源、规划路径、组成服务功能链，并且所述资源管理系统下发的报文转发策略的优先级优于其所属网络内的网内路由器的转发策略。Wherein, the resource management system is responsible for unified management and scheduling of network resources, planning paths, and forming service function chains, and the priority of the packet forwarding policy issued by the resource management system is higher than that of the routers in the network to which it belongs. forwarding strategy.

在一些实施例中，所述服务资源分为服务内容和服务功能，服务资源用服务标识表征，服务标识中不含位置信息以及服务提供商信息，并且服务资源按需向所属网络以及所述核心网的服务查询系统和资源管理系统注册或更新信息；In some embodiments, the service resource is divided into service content and service function, and the service resource is characterized by a service identifier, which does not contain location information and service provider information, and the service resource is sent to the network to which it belongs and the core Register or update information in the service inquiry system and resource management system of the website;

其中，所述服务查询系统负责服务内容的注册或更新、服务标识的分配以及将用户模糊查找所提供的关键字转换为可能的服务标识列表并下发给用户进行选择；Wherein, the service query system is responsible for the registration or update of service content, the distribution of service marks, and the conversion of keywords provided by the user's fuzzy search into a list of possible service marks and issued to users for selection;

其中，所述资源管理系统负责统一管理和调度网络资源、规划路径、组成服务功能链，并且其中所述资源管理系统下发的报文转发策略的优先级优于其所属网络内的网内路由器的转发策略。Wherein, the resource management system is responsible for unified management and scheduling of network resources, planning paths, and forming service function chains, and wherein the priority of the message forwarding policy issued by the resource management system is higher than that of the routers in the network to which it belongs forwarding strategy.

在一些实施例中，所述空间核心网作为所述地面核心网的接入网，通过其间的边界路由器向所述地面核心网进行空间核心网所属网络实体的信息注册或更新，并且通过所述地面核心网与其它和地面核心网直接相连的接入网进行通信。In some embodiments, the space core network serves as the access network of the terrestrial core network, registers or updates the information of the network entity to which the space core network belongs to the terrestrial core network through a border router therebetween, and through the The terrestrial core network communicates with other access networks directly connected to the terrestrial core network.

本发明另一方面提供一种实现陆、海、空、天网络一体化的网络体系架构的方法，包括：Another aspect of the present invention provides a method for realizing the integrated network architecture of land, sea, air and sky networks, including:

组建核心网和接入网，其中所述核心网包括地面核心网和空间核心网，所述接入网包括地面接入网、海洋接入网、航空接入网和空间接入网；Establishing a core network and an access network, wherein the core network includes a ground core network and a space core network, and the access network includes a ground access network, a marine access network, an aviation access network, and a space access network;

所述接入网向所述核心网注册或更新信息，并且通过所述核心网与其它接入网进行通信。The access network registers or updates information with the core network, and communicates with other access networks through the core network.

在一些实施例中，所述核心网和所述接入网均被配置为包括：In some embodiments, both the core network and the access network are configured to include:

网络管理系统，包括服务查询系统、位置映射系统以及资源管理系统；Network management system, including service query system, location mapping system and resource management system;

网络实体，包括用户、路由器和提供服务资源的服务器中的至少一个；network entities, including at least one of users, routers, and servers providing service resources;

其中所述网络实体向所属网络的网络管理系统注册或更新信息并按需向所述核心网的网络管理系统注册或更新信息，并且通过所述核心网与其它接入网内的网络实体进行通信。Wherein, the network entity registers or updates information with the network management system of the network to which it belongs and registers or updates information with the network management system of the core network as required, and communicates with network entities in other access networks through the core network .

在一些实施例中，每个网络实体被配置为包括身份标识和位置标识，身份标识用于表征网络实体本身，位置标识用于表征网络实体在网络中的位置，并且其中每个网络实体按需向所属网络及所述核心网的位置映射系统和资源管理系统注册或更新信息；In some embodiments, each network entity is configured to include an identity identifier and a location identifier, the identity identifier is used to characterize the network entity itself, the location identifier is used to characterize the position of the network entity in the network, and each network entity Register or update information with the location mapping system and resource management system of the network to which it belongs and the core network;

其中，所述核心网和接入网均被配置为具有各自独立的网络编号作为其身份标识，每个接入网和核心网的位置标识为其网络内连接其它网络的边界路由器的位置标识，边界路由器在相连的两个网络中均具有位置标识，其中所述身份标识用于表征该网络本身，所述位置标识用于表征该网络的位置；Wherein, the core network and the access network are both configured to have their own independent network numbers as their identity identifiers, and the location identifiers of each access network and core network are the location identifiers of border routers connected to other networks within the network, The border router has location identifiers in the two connected networks, wherein the identity identifier is used to represent the network itself, and the location identifier is used to represent the location of the network;

其中，所述位置映射系统被配置为负责维护其所属网络内所述网络实体身份标识与位置标识的绑定以及其它网络的身份标识与位置标识的绑定关系；并且Wherein, the location mapping system is configured to be responsible for maintaining the binding of the network entity identity and the location identifier in the network to which it belongs and the binding relationship between the identity identifier and the location identifier of other networks; and

其中，所述资源管理系统被配置为负责统一管理和调度网络资源、规划路径、组成服务功能链，并且所述资源管理系统下发的报文转发策略的优先级优于其所属网络内的网内路由器的转发策略。Wherein, the resource management system is configured to be responsible for unified management and scheduling of network resources, planning paths, and forming service function chains, and the priority of the packet forwarding policy issued by the resource management system is higher than that of the network resources in the network to which it belongs. The forwarding policy of the internal router.

在一些实施例中，所述服务资源分为服务内容和服务功能，服务资源用服务标识表征，服务标识中不含位置信息以及服务提供商信息，并且服务资源按需向所属网络以及所述核心网的服务查询系统和资源管理系统注册或更新信息；In some embodiments, the service resource is divided into service content and service function, and the service resource is characterized by a service identifier, which does not contain location information and service provider information, and the service resource is sent to the network to which it belongs and the core Register or update information in the service inquiry system and resource management system of the website;

其中，所述服务查询系统被配置为负责服务内容的注册或更新、服务标识的分配以及将用户模糊查找所提供的关键字转换为可能的服务标识列表并下发给用户进行选择；Wherein, the service query system is configured to be responsible for the registration or update of service content, the distribution of service identifiers, and the conversion of keywords provided by the user's fuzzy search into a list of possible service identifiers and sending them to users for selection;

其中，所述资源管理系统被配置为负责统一管理和调度网络资源、规划路径、组成服务功能链，并且其中所述资源管理系统下发的报文转发策略的优先级优于其所属网络内的网内路由器的转发策略。Wherein, the resource management system is configured to be responsible for unified management and scheduling of network resources, planning paths, and forming service function chains, and wherein the priority of the message forwarding policy delivered by the resource management system is higher than that of the network to which it belongs. The forwarding policy of routers in the network.

在一些实施例中，所述空间核心网作为所述地面核心网的接入网，通过其间的边界路由器向所述地面核心网进行空间核心网所属网络实体的信息注册或更新，并且通过所述地面核心网与其它和地面核心网直接相连的接入网进行通信。In some embodiments, the space core network serves as the access network of the terrestrial core network, registers or updates the information of the network entity to which the space core network belongs to the terrestrial core network through a border router therebetween, and through the The terrestrial core network communicates with other access networks directly connected to the terrestrial core network.

本发明旨在提出一种实现陆、海、空、天网络一体化的网络体系架构及方法。在该体系架构中，全网被划分为核心网和接入网两种网络。其中，核心网包括地面核心网和空间核心网，接入网则泛指除核心网以外的所有网络。接入网通过边界路由器与核心网相连，并通过核心网实现接入网间的互联互通。在下文中，本发明所提出的实现陆、海、空、天网络一体化的网络体系架构简称为“一体化网络”。一体化网络体系架构可以采用“身份与位置分离”、“资源与位置分离”以及“控制与转发分离”的思想并定义了三种标识，即身份标识、位置标识、服务标识，以及三种网络管理系统，即位置映射系统、服务查询系统以及资源管理系统。The present invention aims to propose a network architecture and method for realizing the integration of land, sea, air and space networks. In this architecture, the entire network is divided into two types of networks, the core network and the access network. Among them, the core network includes the ground core network and the space core network, and the access network generally refers to all networks except the core network. The access network is connected to the core network through the border router, and the interconnection between the access networks is realized through the core network. Hereinafter, the network architecture for realizing the integration of land, sea, air and space networks proposed by the present invention is referred to as "integrated network" for short. The integrated network architecture can adopt the ideas of "separation of identity and location", "separation of resources and location" and "separation of control and forwarding" and defines three types of identification, namely identity identification, location identification, service identification, and three types of network Management systems, namely location mapping systems, service query systems, and resource management systems.

附图说明Description of drawings

通过以下参照附图对本发明实施例的描述，本发明的上述以及其它目的、特征和优点将更为清楚，在附图中：Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:

图1为一体化网架构模型；Figure 1 is an integrated network architecture model;

图2为用户注册或更新方法(用户所处接入网与地面核心网络直接相连情景)；Fig. 2 is a method for user registration or update (the access network where the user is located is directly connected to the terrestrial core network);

图3为用户注册或更新方法(用户所处接入网与空间核心网络直接相连情景)；Fig. 3 is a method for user registration or update (the access network where the user is located is directly connected to the space core network);

图4为服务器注册或更新方法(服务器所处接入网与地面核心网络直接相连情景)；Fig. 4 is a server registration or update method (the access network where the server is located is directly connected to the terrestrial core network scenario);

图5为服务器注册或更新方法(所处接入网与空间核心网络直接相连情景)；Fig. 5 is a server registration or update method (where the access network is directly connected to the space core network);

图6为一体化网络端到端传输模式(通信双方在同一接入网内的情景)；Fig. 6 is the end-to-end transmission mode of the integrated network (the scenario where both communication parties are in the same access network);

图7为一体化网络端到端传输模式(通信双方在不同的接入网并且两个接入网直接通过某一核心网即空间核心网或地面核心网互联的情景)；Figure 7 shows the end-to-end transmission mode of the integrated network (the communication parties are in different access networks and the two access networks are directly interconnected through a certain core network, that is, the space core network or the ground core network);

图8为一体化网络端到端传输模式(通信双方在不同的接入网并且两个接入网通过双核心网互联的情景)；Figure 8 is the end-to-end transmission mode of the integrated network (the communication parties are in different access networks and the two access networks are interconnected through a dual-core network);

图9为服务查询过程；Figure 9 is the service query process;

图10为服务传输过程(用户所选服务器与用户所处接入网相同的情景)；Fig. 10 is the service transmission process (the scenario where the server selected by the user is the same as the access network where the user is located);

图11为服务传输过程(用户与服务器在不同的接入网并且两个接入网直接通过某一核心网即空间核心网或地面核心网互联的情景)；Figure 11 is the service transmission process (the user and the server are in different access networks and the two access networks are directly interconnected through a certain core network, that is, a space core network or a ground core network);

图12为服务传输过程(用户与服务器在不同的接入网并且两个接入网直接通过双核心网互联的情景)；Figure 12 is the service transmission process (the user and the server are in different access networks and the two access networks are directly interconnected through the dual-core network);

图13为服务功能请求方法；Figure 13 is a service function request method;

图14为实施例1的示意图；Fig. 14 is the schematic diagram of embodiment 1;

图15为实施例2的示意图；Fig. 15 is the schematic diagram of embodiment 2;

图16为实施例3的示意图；Fig. 16 is the schematic diagram of embodiment 3;

图17为实施例4的示意图；Fig. 17 is the schematic diagram of embodiment 4;

图18为实施例5的示意图。Figure 18 is a schematic diagram of Embodiment 5.

应当注意的是，本说明书附图并非按照比例绘制，而仅为示意性的目的，因此，不应被理解为对本发明范围的任何限制和约束。在附图中，相似的组成部分以相似的附图标号标识。It should be noted that the drawings in this specification are not drawn to scale, but are for illustrative purposes only, and therefore, should not be construed as any limitation or restriction on the scope of the present invention. In the drawings, similar components are identified with similar reference numerals.

具体实施方式detailed description

下面结合附图对本发明的技术方案作进一步的描述。以下参照附图进行详细的描述，所述附图形成本发明的一部分，且在本发明中，附图通过对实施本发明的具体实施例的解释表示出来。应当理解的是在不偏离本发明的范围的情况下可以采用其它的实施例且可以进行结构上或逻辑上的改变。例如，对于一个实施例解释或描述的特征可被用于其它实施例或与其它实施例结合来生成另一个实施例。其意图在于本发明包括这样的修改和变化。这些示例用特定的语句描述，但它们不应被理解为对所附的权利要求范围的限制。附图仅出于解释性目的且并非按比例绘制。除非特别说明，出于清楚的目的，相应的元件在不同的附图中采用同样的附图标记表示。The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings. The detailed description follows with reference to the accompanying drawings, which form a part hereof and, in the present invention, are shown by way of explanation of specific embodiments for carrying out the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. For example, features explained or described for one embodiment can be used on or in combination with other embodiments to yield a still further embodiment. It is intended that the present invention includes such modifications and variations. These examples were described with specific language, but they should not be construed as limiting the scope of the appended claims. The drawings are for explanatory purposes only and are not drawn to scale. For purposes of clarity, corresponding elements are denoted by the same reference numerals in the different drawings unless otherwise specified.

术语"具有","含有","包括","包含"等是开放性的，它们表示所描述的结构，元件或者特征的存在，但并不排除额外元件或特征。The terms "having", "comprising", "comprising", "comprising" and the like are open-ended, and they indicate the presence of described structures, elements or features, but do not exclude additional elements or features.

一、本发明的一体化网络具有以下特征：One, the integrated network of the present invention has the following characteristics:

一体化网络体系架构模型如图1所示。该网络由核心网和接入网组成。核心网只部署在地面网络和空间网络中，即地面核心网Y2和空间核心网Y1，其作用是实现不同接入网间的互联互通。除地面核心网和空间核心网外，其余网络均视为一体化网络的接入网，如地面接入网络(例如地面固定接入网、地面移动接入网Z、地面孤岛接入网X)、海洋接入网、航空接入网、空间接入网络(深空接入网)等。所有接入网通过与地面核心网或空间核心网相连的边界路由器接入到核心网络中，并通过核心网与其它接入网进行通信。The integrated network architecture model is shown in Figure 1. The network consists of a core network and an access network. The core network is only deployed in the ground network and the space network, that is, the ground core network Y2 and the space core network Y1, and its function is to realize the interconnection and intercommunication between different access networks. Except for the terrestrial core network and space core network, other networks are regarded as access networks of integrated networks, such as terrestrial access networks (such as terrestrial fixed access network, terrestrial mobile access network Z, terrestrial island access network X) , ocean access network, aviation access network, space access network (deep space access network), etc. All access networks are connected to the core network through border routers connected to the ground core network or space core network, and communicate with other access networks through the core network.

其中所述核心网和所述接入网均包括：网络管理系统，包括服务查询系统、位置映射系统以及资源管理系统(图1中为了方便仅在地面核心网Y2中示出)；网络实体，包括用户、路由器和提供服务资源的服务器中的至少一个；其中所述网络实体向所属网络的网络管理系统注册或更新信息并按需向所述核心网的网络管理系统注册或更新信息，并且通过所述核心网与其它接入网内的网络实体进行通信。Wherein, both the core network and the access network include: a network management system, including a service query system, a location mapping system, and a resource management system (only shown in the terrestrial core network Y2 in FIG. 1 for convenience); network entities, Including at least one of users, routers, and servers providing service resources; wherein the network entity registers or updates information with the network management system of the network to which it belongs and registers or updates information with the network management system of the core network as required, and through The core network communicates with network entities within other access networks.

在“双核心”网络中，地面核心网作为“双核心”的“主核心”，空间核心网作为“双核心”网络的“从核心”。在地面核心网看来，空间核心网是其一个特殊的接入网。空间核心网由GEO卫星、MEO卫星以及LEO卫星组成，按卫星照距离地面的高度形成“三层网络”结构。空间核心网在GEO卫星部署网络管理系统，MEO卫星则作为GEO卫星的辅助卫星协助GEO卫星完成某些网路管理功能。MEO卫星也可独自承担某些网络管理功能。而在LEO卫星中则部署转发功能、接入功能、服务功能、服务内容等。GEO卫星和MEO卫星侧重于空间网络管理，主要负责信令传输、少量的数据传输以及深空网络实体的接入，LEO卫星则主要负责陆地、海洋、航空、航天网络实体的接入、数据的传输以及一些服务功能或服务内容的提供。In the "dual core" network, the ground core network serves as the "main core" of the "dual core", and the space core network serves as the "slave core" of the "dual core" network. From the perspective of the ground core network, the space core network is a special access network. The space core network consists of GEO satellites, MEO satellites and LEO satellites, forming a "three-layer network" structure according to the height of the satellites from the ground. The space core network deploys the network management system on the GEO satellite, and the MEO satellite serves as the auxiliary satellite of the GEO satellite to assist the GEO satellite to complete certain network management functions. MEO satellites can also undertake some network management functions on their own. In the LEO satellite, the forwarding function, access function, service function, service content, etc. are deployed. GEO satellites and MEO satellites focus on space network management, and are mainly responsible for signaling transmission, a small amount of data transmission, and access to deep space network entities. LEO satellites are mainly responsible for land, ocean, aviation, space network entity access, and data access. Transmission and provision of some service functions or service content.

其中路由器其中，根据其在所述网络中的功能，路由器包括但不限于接入路由器、普通路由器、缓存路由器、边界路由器等，以实现路由、转发、缓存、入侵检测、防火墙等功能等。Among them, routers, according to their functions in the network, include but are not limited to access routers, common routers, cache routers, border routers, etc., to implement functions such as routing, forwarding, caching, intrusion detection, and firewalls.

其中，根据其在所述网络中的功能，服务器包括但不限于普通服务器和认证服务器等。Wherein, according to its function in the network, the server includes but not limited to a common server and an authentication server.

在一些实施例中，网络实体均有两个标识，即身份标识(ID,Identifier)和位置标识(LOC,Locator)，其目的是实现“身份与位置分离”。身份标识用于表征网络实体本身，以实现网络实体的识别、认证、鉴权等。位置标识则用于表征网络实体在网络中的位置，该标识也被路由协议用于完成网络的路由功能，位置标识即为路由标识。身份标识和位置标识默认为128位。身份标识与位置标识解耦有助于实现网络实体的移动性支持、多接口技术支持、安全性提升等。In some embodiments, each network entity has two identifiers, namely, an identity identifier (ID, Identifier) and a location identifier (LOC, Locator), the purpose of which is to realize "separation of identity and location". The identity mark is used to characterize the network entity itself, so as to realize the identification, authentication and authentication of the network entity. The location identifier is used to represent the location of the network entity in the network, and the identifier is also used by the routing protocol to complete the routing function of the network, and the location identifier is the routing identifier. The ID and location ID are 128 bits by default. The decoupling of identity identification and location identification helps to realize the mobility support of network entities, multi-interface technical support, security improvement, etc.

一体化网络中的服务资源分为服务内容和服务功能。服务内容是指服务提供商为用户提供服务内容本身，如音频、视频、文本、网页等。服务功能是指服务提供商或网络供应商等为用户组织不同功能的网络实体以实现用户所要求的某种结果。服务资源用服务标识(SID,ServiceIdentifier)表征，默认为128位，服务标识中不含位置信息以及服务提供商信息，以实现“资源与位置分离”。The service resources in the integrated network are divided into service content and service function. Service content refers to the service content itself provided by the service provider to the user, such as audio, video, text, web pages, etc. Service functions refer to network entities such as service providers or network providers that organize different functions for users to achieve certain results required by users. The service resource is characterized by a service identifier (SID, ServiceIdentifier), which is 128 bits by default. The service identifier does not contain location information and service provider information, so as to realize "separation of resources and location".

每个接入网、核心网都拥有一个独立的网络编号(NetID,NetworkIdentifier)作为本网络的身份标识。每个接入网、核心网的位置标识即为其网络内边界路由器的位置标识。边界路由器在相连两个网络中分别拥有两个网络内的位置标识。接入网或核心网可在不改变自身网络编号的情况下改变通往相邻网络的边界路由器位置，以实现网络出入口的灵活变换。Each access network and core network has an independent network number (NetID, NetworkIdentifier) as the identity of the network. The location identifier of each access network and core network is the location identifier of the border router in the network. The border router has location identifiers in the two connected networks respectively. The access network or core network can change the position of the border router leading to the adjacent network without changing its own network number, so as to realize the flexible transformation of the network entrance and exit.

服务查询系统负责服务内容的注册、服务标识的分配以及将用户模糊查找所提供的关键字转换为可能的服务标识列表并下发给用户进行选择。服务查询系统维护的服务内容检索信息如表1所示。The service query system is responsible for the registration of service content, the distribution of service marks, and the conversion of the keywords provided by the user's fuzzy search into a list of possible service marks and sent to the user for selection. The service content retrieval information maintained by the service query system is shown in Table 1.

表1：服务查询系统维护的服务内容检索信息Table 1: Service content retrieval information maintained by the service query system

位置映射系统负责维护其所属网络内网络实体身份标识与位置标识的绑定以及某些其它网络身份标识与位置标识的绑定关系，位置映射系统维护的身份与位置绑定关系如表2所示。The location mapping system is responsible for maintaining the binding between the network entity identity and the location identifier in the network to which it belongs, and the binding relationship between some other network identity and location identifiers. The identity and location binding relationship maintained by the location mapping system is shown in Table 2 .

表2：位置映射系统维护的身份与位置绑定关系Table 2: Binding relationship between identity and location maintained by the location mapping system

身份标识ID 位置标识location identification 用户1的身份标识ID of user 1 用户1的位置标识User 1's location identifier 用户2的身份标识ID of user 2 用户2的位置标识User 2's location identifier …… …… 用户3的身份标识ID of user 3 用户3所属网络网络编号Network number of the network to which user 3 belongs 用户4的身份标识ID of user 4 用户4所属网络网络编号Network number of the network to which user 4 belongs …… …… 网络1的网络编号Network number of network 1 通往网络1的边界路由器的位置标识Location ID of the border router leading to Network 1 网络2的网络编号Network number of network 2 通往网络2的边界路由器的位置标识Location ID of the border router leading to Network 2 …… ……

而资源管理系统则负责统一管理和调度网络资源、规划路径、组成服务功能链等。资源管理系统拥有所属网络的完整拓扑，以及网络内路由器的性能参数、资源使用率等信息。资源管理系统维护的路由器信息如表3所示。资源管理系统可根据网络运行状态向路由器下发报文转发策略以实现路径规划等。对于路由器，资源管理系统下发的报文转发策略的优先级优于路由器的自身计算出来的转发表。下发的转发策略如表4所示，匹配项可为服务标识、位置标识、身份标识等本身或组合。资源管理系统用于实现“控制与转发分离”。The resource management system is responsible for unified management and scheduling of network resources, planning paths, and forming service function chains. The resource management system has a complete topology of the network to which it belongs, as well as information such as performance parameters and resource usage of routers in the network. The router information maintained by the resource management system is shown in Table 3. The resource management system can issue message forwarding policies to routers according to the network operation status to implement path planning, etc. For routers, the priority of the packet forwarding policy delivered by the resource management system is higher than the forwarding table calculated by the router itself. The issued forwarding policy is shown in Table 4, and the matching items can be service identifiers, location identifiers, identity identifiers, etc. by themselves or in combination. The resource management system is used to realize "separation of control and forwarding".

表3：资源管理系统维护的路由器信息Table 3: Router information maintained by the resource management system

表4：资源管理系统下发的策略Table 4: Policies issued by the resource management system

匹配项matches 入口Entrance 出口exit (SID,LOC)(SID,LOC) 接口1interface 1 接口2Interface 2 …… …… ……

一体化网络支持端到端传输模式和逐跳传输模式，通信双方可根据实际情况使用不同的传输模式。端到端传输模式可以使用现有TCP(TransmissionControlProtocol)或UDP(UserDatagramProtocol)等传输协议，主要用于信令交互以及兼容现有互联网端到端的通信模式。使用端到端传输模式时，传输通道以[身份标识、端口号]标识，利于通信双方实体的识别、移动、并行传输等。逐跳传输模式旨在就近获取内容本身，无需建立传输通道。在该模式下，用户发送的服务内容请求中含有服务标识，收到服务内容请求报文的网络实体需查看本地是否存储有对应的服务内容，有则直接返回给请求者，否则继续路由。服务内容数据回传时，沿途带有缓存功能的路由器可按需存储服务内容。服务内容请求报文中可添加“服务需求描述”，服务需求描述定义了所请求服务内容的最低服务质量。The integrated network supports end-to-end transmission mode and hop-by-hop transmission mode, and the communication parties can use different transmission modes according to the actual situation. The end-to-end transmission mode can use the existing transmission protocols such as TCP (Transmission Control Protocol) or UDP (User Datagram Protocol), which is mainly used for signaling interaction and compatible with the existing Internet end-to-end communication mode. When the end-to-end transmission mode is used, the transmission channel is identified by [identity identifier, port number], which facilitates the identification, movement, and parallel transmission of entities on both sides of the communication. The hop-by-hop transmission mode aims to obtain the content itself nearby without establishing a transmission channel. In this mode, the service content request sent by the user contains the service identifier, and the network entity receiving the service content request message needs to check whether the corresponding service content is stored locally, and return it directly to the requester, otherwise continue routing. When the service content data is transmitted back, the router with caching function along the way can store the service content on demand. A "service requirement description" can be added to the service content request message, and the service requirement description defines the minimum service quality of the requested service content.

接入网和核心网可依据自身特点使用自己的路由协议和传输协议。各网络路由协议所使用的位置标识仅限于自己网络内使用，相应的位置标识长度可自行定义。边界路由器负责位置标识的替换。各网络传输协议所使用的身份标识长度可自行定义。对于使用不同传输协议的相邻网络，其边界路由器需进行传输协议、身份标识长度的转换。The access network and the core network can use their own routing protocols and transmission protocols according to their own characteristics. The location identifier used by each network routing protocol is limited to use within its own network, and the length of the corresponding location identifier can be defined by itself. Border routers are responsible for location identifier replacement. The length of the identifier used by each network transmission protocol can be defined by itself. For adjacent networks that use different transmission protocols, the border routers need to convert the transmission protocol and the length of the ID.

一体化网络所使用的通用报文格式如表5所示，其中头部包含源位置标识、目的位置标识、服务标识、源身份标识、目的身份标识、源端口号以及目的端口号。其中，服务标识、源身份标识以及目的身份标识为可选项，报文头部按需携带。The general message format used by the integrated network is shown in Table 5, where the header includes source location identifier, destination location identifier, service identifier, source identity identifier, destination identity identifier, source port number, and destination port number. Among them, the service identifier, the source identifier and the destination identifier are optional items, and the header of the message is carried as required.

表5：通用报文格式Table 5: Common message format

无论在核心网还是接入网，网络实体按需向所属网络的位置映射系统和资源管理系统注册或更新必要的信息，而服务资源则按需向所属网络的服务查询系统以及资源管理系统注册或更新必要的信息。Regardless of whether it is in the core network or the access network, network entities register or update necessary information with the location mapping system and resource management system of the network to which they belong, and service resources register or update with the service query system and resource management system of the network to which they belong. Update the necessary information.

二、一体化网络中网络实体注册或更新方法2. Method for registering or updating network entities in the integrated network

用户、服务器需要通过其接入路由器(第一跳路由器)向位置映射系统注册或更新其位置标识，其位置标识由用户、服务器所接入的接入路由器分配。服务器还需向服务查询系统和资源管理系统注册或更新其提供的服务资源，路由器则向所属网络的资源管理系统注册其身份标识、位置标识、自身硬件参数信息(如网卡带宽、内存容量、中央处理器性能等)以及所具备的特殊功能，如缓存功能、防火墙功能等。此外，路由器还需向所属网络的资源管理系统定期更新其使用状态(路由器某些或全部硬件资源的使用率)，方便后者感知网络的整体运行情况。Users and servers need to register or update their location identifiers with the location mapping system through their access routers (first-hop routers), and their location identifiers are allocated by the access routers that users and servers access. The server also needs to register or update the service resources it provides with the service query system and resource management system, and the router registers its identity, location, and its own hardware parameter information (such as network card bandwidth, memory capacity, central Processor performance, etc.) and its special functions, such as cache function, firewall function, etc. In addition, the router also needs to regularly update its usage status (the usage rate of some or all hardware resources of the router) to the resource management system of the network to which it belongs, so that the latter can perceive the overall operation status of the network.

2.1用户注册或更新方法2.1 User registration or update method

2.1.1用户所处接入网与地面核心网络直接相连情景2.1.1 Scenario where the user's access network is directly connected to the terrestrial core network

如图2所示，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与地面核心网Y的边界路由器为BR_X-Y，接入网X的网络编号为X_Net-ID。用户注册或更新过程遵循以下步骤：As shown in Figure 2, it may be advisable to set user A, its access router as AR _A , its identity as A _ID , and its location in access network X as A _X-LOC ; the interconnection between access network X and ground core The border router of network Y is BR _XY , and the network number of access network X is X _Net-ID . The user registration or update process follows these steps:

步骤1、A发送接入请求报文至AR_A，并携带认证相关信息，用户侧只使用身份标识进行通信；Step 1. _A sends an access request message to ARA, carrying authentication-related information, and the user side only uses the identity to communicate;

步骤2、AR_A从请求报文中提取出A_ID和认证相关信息发往认证服务器验证A的身份；Step 2, AR _A extracts A _ID and authentication related information from the request message and sends it to the authentication server to verify A's identity;

步骤3、认证服务器将A的认证结果返回给AR_A；Step 3, the authentication server returns the authentication result of A to AR _A ;

步骤4、AR_A将认证结果转发给A；Step 4, AR _A forwards the authentication result to A;

步骤5、AR_A查看认证服务器返回的认证结果，若合法，则从自身的位置标识池中分配一个位置标识A_X-LOC给A，并记录下A_ID与A_X-LOC的绑定关系。之后，AR_A代替A向接入网X的位置映射系统注册或更新A_ID与A_X-LOC的绑定关系；Step 5. AR _A checks the authentication result returned by the authentication server. If it is legal, it allocates a location identifier A _X-LOC from its own location identifier pool to A, and records the binding relationship between A _ID and A _X-LOC . After that, AR _A replaces A to register with the location mapping system of access network X or update the binding relationship between A _ID and A _X-LOC ;

步骤6、接入网X的位置映射系统收到注册或更新报文后，注册或更新A_ID与A_X-LOC的绑定关系，并向AR_A发送确认信息；Step 6. After receiving the registration or update message, the location mapping system of access network X registers or updates the binding relationship between A _ID and _{A X-LOC} , and sends confirmation information to ARA;

若A发生了移动并且从其它接入网切换到接入网X、或A为首次接入网络，注册或更新过程还需完成以下步骤：If A moves and switches from another access network to access network X, or A accesses the network for the first time, the registration or update process needs to complete the following steps:

步骤7、接入网X的位置映射系统通过BR_X-Y向地面核心网Y的位置映射系统注册或更新A_ID与X_Net-ID的绑定关系；Step 7. The location mapping system of access network X registers or updates the binding relationship between A _ID and X _Net-ID with the location mapping system of terrestrial core network Y through BR _XY ;

步骤8、BR_X-Y收到注册或更新报文后，返回确认信息至接入网X的位置映射系统；Step 8. After receiving the registration or update message, BR _XY returns confirmation information to the location mapping system of access network X;

步骤9、BR_X-Y向地面核心网Y的位置映射系统注册或更新A_ID与X_Net-ID的绑定关系；Step 9, BR _XY registers with the location mapping system of the ground core network Y or updates the binding relationship between A _ID and X _Net-ID ;

步骤10、地面核心网Y的位置映射系统收到注册或更新报文后，注册或更新A_ID与X_Net-ID的绑定关系，并向BR_X-Y发送确认信息。Step 10. After receiving the registration or update message, the location mapping system of ground core network Y registers or updates the binding relationship between A _ID and X _Net-ID , and sends a confirmation message to BR _XY .

2.1.2用户通过LEO卫星或GEO卫星直接接入空间核心网情景2.1.2 Scenarios where users directly access the space core network through LEO satellites or GEO satellites

在此情景下，用户通常为陆地、海洋、航空、航天、深空等无法组网的单一用户，空间核心网需作为其接入网络，保证其通信的畅通。此时，可将空间核心网视为地面核心网的接入网，执行2.1.1所述的用户注册或更新方法。In this scenario, users are usually single users who cannot form a network such as land, sea, aviation, aerospace, and deep space. The space core network needs to be used as their access network to ensure smooth communication. At this time, the space core network can be regarded as the access network of the terrestrial core network, and the user registration or update method described in 2.1.1 is executed.

2.1.3用户所处接入网与空间核心网络直接相连情景2.1.3 Scenario where the user's access network is directly connected to the space core network

用户注册或更新过程与2.1.1所述步骤相同，区别在于空间核心网在收到用户注册或更新后还需向地面核心网发起注册或更新过程。The user registration or update process is the same as the steps described in 2.1.1, except that the space core network needs to initiate the registration or update process to the ground core network after receiving user registration or update.

如图3所示，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与空间核心网Y1的边界路由器为BR_X-Y1；互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2，接入网X的网络编号为X_Net-ID，空间核心网Y1的网络编号为Y1_Net-ID。用户注册或更新过程遵循以下步骤：As shown in Figure 3, it may be assumed that the user is A, its access router is AR _A , its identity is A _ID , and its location in access network X is marked as A _X-LOC ; the interconnection between access network X and the space core The border router of network Y1 is BR _X-Y1 ; the border router interconnecting space core network Y1 and ground core network Y2 is BR _Y1-Y2 , the network number of access network X is X _Net-ID , and the network number of space core network Y1 For Y1 _Net-ID . The user registration or update process follows these steps:

步骤1、A发送接入请求报文至AR_A，并携带认证相关信息，用户侧只使用身份标识进行通信；Step 1. _A sends an access request message to ARA, carrying authentication-related information, and the user side only uses the identity to communicate;

步骤2、AR_A从请求报文中提取出A_ID和认证相关信息发往认证服务器验证A的身份；Step 2, AR _A extracts A _ID and authentication related information from the request message and sends it to the authentication server to verify A's identity;

步骤3、认证服务器将A的认证结果告知AR_A；Step 3, the authentication server notifies AR A of the authentication result of _A ;

步骤4、AR_A将认证结果转发给A；Step 4, AR _A forwards the authentication result to A;

步骤5、AR_A查看认证服务器返回的认证结果，若合法，则从位置标识池中分配一个位置标识A_X-LOC给A，并记录下A_ID与A_X-LOC的绑定关系。之后，AR_A代替A向接入网X的位置映射系统注册或更新A_ID与A_X-LOC的绑定关系；Step 5. AR _A checks the authentication result returned by the authentication server. If it is legal, it allocates a location identifier A _X-LOC from the location identifier pool to A, and records the binding relationship between A _ID and A _X-LOC . After that, AR _A replaces A to register with the location mapping system of access network X or update the binding relationship between A _ID and A _X-LOC ;

步骤6、接入网X的位置映射系统收到注册或更新报文后，注册或更新A_ID与A_X-LOC的绑定关系，并向AR_A发送确认信息；Step 6. After receiving the registration or update message, the location mapping system of access network X registers or updates the binding relationship between A _ID and _{A X-LOC} , and sends confirmation information to ARA;

若A发生移动并且从其它接入网切换到接入网X、或A为首次接入网络，注册或更新过程还需完成以下步骤：If A moves and switches from another access network to access network X, or A accesses the network for the first time, the registration or update process needs to complete the following steps:

步骤7、接入网X的位置映射系统通过BR_X-Y1向空间核心网Y1的位置映射系统注册或更新A_ID与X_Net-ID的绑定关系；Step 7. The location mapping system of the access network X registers or updates the binding relationship between A _ID and X _Net-ID with the location mapping system of the spatial core network Y1 through BR _X-Y1 ;

步骤8、BR_X-Y1收到注册或更新报文后，返回确认信息至接入网X的位置映射系统；Step 8. After receiving the registration or update message, BR _X-Y1 returns confirmation information to the location mapping system of access network X;

步骤9、BR_X-Y1向空间核心网Y1的位置映射系统注册或更新A_ID与X_Net-ID的绑定关系；Step 9, BR _X-Y1 registers or updates the binding relationship between A _ID and X _Net-ID with the location mapping system of space core network Y1;

步骤10、空间核心网Y1的位置映射系统收到注册或更新报文后，注册或更新A_ID与X_Net-ID的绑定关系，并向BR_X-Y1发送确认信息。Step 10: After receiving the registration or update message, the location mapping system of the spatial core network Y1 registers or updates the binding relationship between A _ID and X _Net-ID , and sends a confirmation message to BR _X-Y1 .

步骤11、空间核心网Y1的位置映射系统通过BR_Y1-Y2向地面核心网Y2的位置映射系统注册或更新A_ID与Y1_Net-ID的绑定关系；Step 11, the location mapping system of the space core network Y1 registers or updates the binding relationship between A _ID and Y1 _Net-ID with the location mapping system of the ground core network Y2 through BR _Y1-Y2 ;

步骤12、BR_Y1-Y2收到注册或更新报文后，返回确认信息至空间核心网Y1的位置映射系统；Step 12. After receiving the registration or update message, BR _Y1-Y2 returns confirmation information to the location mapping system of space core network Y1;

步骤13、BR_Y1-Y2向地面核心网Y2的位置映射系统注册或更新A_ID与Y1_Net-ID的绑定关系；Step 13, BR _Y1-Y2 registers with the location mapping system of the ground core network Y2 or updates the binding relationship between A _ID and Y1 _Net-ID ;

步骤14、地面核心网Y2的位置映射系统收到注册或更新报文后，注册或更新A_ID与Y1_Net-ID的绑定关系，并向BR_Y1-Y2发送确认信息。Step 14: After receiving the registration or update message, the location mapping system of the ground core network Y2 registers or updates the binding relationship between A _ID and Y1 _Net-ID , and sends a confirmation message to BR _Y1-Y2 .

2.2服务器注册或更新方法2.2 Server registration or update method

服务器注册或更新方法与用户注册或更新方法相似，区别在于服务器还需向服务查询系统和资源管理系统注册或更新其服务资源。服务器向位置映射系统注册或更新的方法与2.1节所述完全相同，本节不再赘述。服务资源分为服务内容和服务功能。The server registration or update method is similar to the user registration or update method, the difference is that the server also needs to register or update its service resources with the service query system and resource management system. The method for the server to register or update the location mapping system is exactly the same as that described in Section 2.1, and will not be repeated in this section. Service resources are divided into service content and service functions.

2.2.1服务内容注册或更新方法2.2.1 Service Content Registration or Update Method

为完成服务内容的解析，服务器需向服务查询系统注册或更新，提供服务器自身的身份标识、服务描述信息SDI(ServiceDescriptionInformation，包括服务内容名称、提供商、关键字、摘要等)并获得服务标识。服务器通过其第一跳路由器(接入路由器)接入网络，其第一跳路由器作为服务器的代理完成服务内容注册或更新的相关过程。In order to complete the analysis of service content, the server needs to register or update with the service query system, provide the server's own identity, service description information SDI (Service Description Information, including service content name, provider, keyword, abstract, etc.) and obtain the service identification. The server accesses the network through its first-hop router (access router), and its first-hop router acts as an agent of the server to complete the related process of service content registration or update.

2.2.1.1服务器所处接入网与地面核心网络直接相连情景2.2.1.1 The scenario where the access network where the server is located is directly connected to the ground core network

如图4所示，不妨设服务器为A，其接入路由器为AR_A，其身份标识为A_ID；互联接入网X与地面核心网Y的边界路由器为BR_X-Y；服务标识为SID，服务描述信息为SDI，接入网X的网络编号为X_Net-ID。服务器服务内容注册或更新过程遵循以下步骤：As shown in Figure 4, it is advisable to set the server as A, its access router as AR _A , and its identity as A _ID ; the border router between the interconnection access network X and the ground core network Y as BR _XY ; The description information is SDI, and the network number of the access network X is X _Net-ID . The server service content registration or update process follows the following steps:

步骤1、A发送服务内容注册或更新报文至AR_A，报文中携带SDI；Step 1. A sends a service content registration or update message to AR _A , and the message carries SDI;

步骤2、AR_A从注册或更新报文中提取A_ID和SDI后发往接入网X的服务查询系统进行注册或更新；Step 2, AR _A extracts the A _ID and SDI from the registration or update message and sends it to the service query system of access network X for registration or update;

步骤3、接入网X的服务查询系统收到后，根据SDI查询是否已经存在相同的服务内容，是则提取出该服务内容所对应的SID后返回给AR_A；否则根据服务内容本身生成一个新的SID，之后，将SID返回给AR_A；Step 3, after the service query system of access network X receives it, it queries whether the same service content already exists according to the SDI, and if so, extracts the SID corresponding to the service content and returns it to _ARA ; otherwise, a service content is generated according to the service content itself new SID, after which, return the SID to AR _A ;

步骤4、AR_A收到后将SID返回给A；Step 4, AR _A returns the SID to A after receiving it;

步骤5、同时，接入网X的服务查询系统缓存下SID、A_ID、SDI以及X_Net-ID绑定关系后，通过BR_X-Y向地面核心网Y的服务查询系统发起注册或更新请求；Step 5. At the same time, after the service query system of the access network X caches the binding relationship of SID, A _ID , SDI and X _Net-ID , it initiates a registration or update request to the service query system of the terrestrial core network Y through BR _XY ;

步骤6、BR_X-Y收到服务注册或更新请求后，向接入网X的服务查询系统发送确认信息；Step 6. After receiving the service registration or update request, BR _XY sends confirmation information to the service query system of access network X;

步骤7、BR_X-Y向地面核心网Y的服务查询系统发起注册或更新请求；Step 7, BR _XY initiates a registration or update request to the service query system of the terrestrial core network Y;

步骤8、地面核心网Y的服务查询系统缓存下SID、A_ID、SDI以及X_Net-ID绑定关系后向BR_X-Y发送确认信息。Step 8: The service query system of the terrestrial core network Y sends a confirmation message to BR _XY after caching the binding relationship between SID, A _ID , SDI and X _Net-ID .

2.2.1.2通过LEO卫星或GEO卫星直接接入空间核心网情景2.2.1.2 Scenario of direct access to space core network via LEO satellite or GEO satellite

在此情景下，服务器通常为陆地、海洋、航空、航天、深空等无法组网的单一服务器，空间核心网需作为其接入网络，保证其通信的畅通。此时，可将空间核心网视为地面核心网的接入网，执行2.2.1.1所述的服务器注册或更新方法。In this scenario, the server is usually a single server that cannot be networked on land, ocean, aviation, aerospace, deep space, etc., and the space core network needs to be used as its access network to ensure smooth communication. At this time, the space core network can be regarded as the access network of the terrestrial core network, and the server registration or update method described in 2.2.1.1 is executed.

2.2.1.3服务器所处接入网与空间核心网络直接相连情景2.2.1.3 The scenario where the access network where the server is located is directly connected to the space core network

如图5所示，不妨设服务器为A，其接入路由器为AR_A，其身份标识为A_ID；互联接入网X与空间核心网Y1的边界路由器为BR_X-Y1，互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2；服务标识为SID，服务描述信息为SDI，接入网X的网络编号为X_Net-ID，空间核心网Y1的网络编号为Y1_Net-ID。服务器服务内容注册或更新过程遵循以下步骤：As shown in Figure 5, it is advisable to set the server as A, its access router as AR _A , and its identity as A _ID ; the border router between the interconnection access network X and the space core network Y1 is BR _X-Y1 , and the interconnection space core The border router between Y1 and ground core network Y2 is BR _Y1-Y2 ; the service identifier is SID, the service description information is SDI, the network number of access network X is X _Net-ID , and the network number of space core network Y1 is Y1 _{Net- ID} . The server service content registration or update process follows the following steps:

步骤1、A发送服务内容注册或更新报文至AR_A，报文中携带SDI；Step 1. A sends a service content registration or update message to AR _A , and the message carries SDI;

步骤2、AR_A从注册或更新报文中提取A_ID和SDI后发往接入网X的服务查询系统进行注册或更新；Step 2, AR _A extracts the A _ID and SDI from the registration or update message and sends it to the service query system of access network X for registration or update;

步骤3、接入网X的服务查询系统收到后，根据SDI查询是否已经存在相同的服务内容，是则提取出该服务内容所对应的SID后返回给AR_A；否则根据服务内容本身生成一个新的SID，之后，将SID返回给AR_A；Step 3, after the service query system of access network X receives it, it queries whether the same service content already exists according to the SDI, and if so, extracts the SID corresponding to the service content and returns it to _ARA ; otherwise, a service content is generated according to the service content itself new SID, after which, return the SID to AR _A ;

步骤4、AR_A收到后将SID返回给A；Step 4, AR _A returns the SID to A after receiving it;

步骤5、接入网X的服务查询系统缓存下SID、A_ID、SDI以及X_Net-ID绑定关系后，通过BR_X-Y1向空间核心网Y1的服务查询系统发起注册或更新请求；Step 5. After the service query system of access network X caches the binding relationship of SID, A _ID , SDI and X _Net-ID , it initiates a registration or update request to the service query system of space core network Y1 through BR _X-Y1 ;

步骤6、BR_X-Y1收到服务注册或更新请求后，向接入网X的服务查询系统发送确认信息；Step 6. After receiving the service registration or update request, BR _X-Y1 sends confirmation information to the service query system of access network X;

步骤7、BR_X-Y1向空间核心网Y1的服务查询系统发起注册或更新请求；Step 7, BR _X-Y1 initiates a registration or update request to the service query system of the spatial core network Y1;

步骤8、空间核心网Y1的服务查询系统缓存下SID、A_ID、SDI以及X_Net-ID绑定关系后向BR_X-Y1发送确认信息；Step 8. The service query system of the space core network Y1 sends a confirmation message to BR _X-Y1 after the binding relationship of SID, A _ID , SDI and X _Net-ID is cached;

步骤9、空间核心网Y1的服务查询系统通过BR_Y1-Y2向地面核心网Y2的服务查询系统发起注册或更新请求；Step 9, the service query system of the space core network Y1 initiates a registration or update request to the service query system of the ground core network Y2 through BR _Y1-Y2 ;

步骤10、BR_Y1-Y2收到服务注册或更新请求后，向空间核心网Y1的服务查询系统发送确认信息；Step 10. After receiving the service registration or update request, BR _Y1-Y2 sends confirmation information to the service query system of space core network Y1;

步骤11、BR_Y1-Y2向地面核心网Y2的服务查询系统发起注册或更新请求；Step 11, BR _Y1-Y2 initiates a registration or update request to the service query system of the terrestrial core network Y2;

步骤12、地面核心网Y2的服务查询系统缓存下SID、A_ID、SDI以及Y1_Net-ID绑定关系后向BR_Y1-Y2发送确认信息。Step 12: The service query system of the terrestrial core network Y2 caches the binding relationship between SID, A _ID , SDI and Y1 _Net-ID , and then sends confirmation information to BR _Y1-Y2 .

2.2.2服务功能注册或更新方法2.2.2 Service function registration or update method

若服务器提供服务功能，服务器需通过其接入路由器向资源管理系统发送注册或更新报文，不妨服务器为A，其接入路由器为AR_A，其身份标识为A_ID，其在网络中的位置标识为A_LOC，服务器注册或更新过程遵循以下步骤：If the server provides service functions, the server needs to send a registration or update message to the resource management system through its access router. The server may be A, its access router is AR _A , its identity is A _ID , and its location in the network Identified as a _LOC , the server registration or update process follows these steps:

步骤1、A通过AR_A所属网络的资源管理系统发送注册或更新报文，报文中按需携带A_ID、A_LOC、可提供的服务功能以及硬件资源使用率；Step 1. A sends a registration or update message through the resource management system of the network to which AR _A belongs, and the message carries A _ID , A _LOC , available service functions, and hardware resource usage as required;

步骤2、AR_A收到注册或更新报文后，向资源管理系统转发；Step 2. After receiving the registration or update message, AR _A forwards it to the resource management system;

步骤3、收到注册或更新报文后，资源管理系统通过AR_A向A发送确认消息；Step 3. After receiving the registration or update message, the resource management system sends a confirmation message to A through AR _A ;

步骤4、AR_A向A发送确认消息。Step 4, AR _A sends a confirmation message to A.

2.3路由器注册或更新方法2.3 Router registration or update method

路由器同样包含身份标识和位置标识，对于可以提供某些功能的路由器还可拥有服务标识。路由器使用身份标识与认证系统交互，保证设备的可信。路由器可使用不同的路由协议保持连通性。网络初始时，路由器向资源管理系统注册其身份标识、位置标识、相邻节点关系、硬件参数以及可提供的服务功能等信息，以便资源管理系统获得全网拓扑、调度并组成服务功能链或具备某些功能的虚拟网络。网络启动后，路由器按需向资源管理系统更新其使用状态。Routers also contain identity and location identifiers, and routers that can provide certain functions can also have service identifiers. The router uses the ID to interact with the authentication system to ensure the authenticity of the device. Routers can maintain connectivity using different routing protocols. At the initial stage of the network, the router registers information such as its identity, location, adjacent node relationships, hardware parameters, and available service functions with the resource management system, so that the resource management system can obtain the entire network topology, schedule and form a service function chain or have Virtual networks for certain functions. After the network is started, the router updates its usage status to the resource management system as needed.

不妨路由器为A，其身份标识为A_ID，其在网络中的位置标识为A_LOC；路由器注册或更新过程遵循以下步骤：Assume the router is A, its identity is A _ID , and its location in the network is A _LOC ; the router registration or update process follows the steps below:

步骤1、A向所属网络的资源管理系统发送注册或更新报文，报文中按需携带A_ID、A_LOC、A的硬件参数、可提供的服务功能以及硬件资源使用率；Step 1. A sends a registration or update message to the resource management system of the network to which it belongs, and the message carries A _ID , A _LOC , A's hardware parameters, available service functions, and hardware resource usage as required;

步骤2、收到注册或更新报文后，资源管理系统向A发送确认消息。Step 2. After receiving the registration or update message, the resource management system sends a confirmation message to A.

三、一体化网络的通信方法3. Communication method of integrated network

3.1一体化网络传输模式3.1 Integrated network transmission mode

一体化网络端到端传输模式可使用面向连接的传输协议，也可使用尽力而为的传输协议，通信双方按需选择，但传输通道以通信双方的[身份标识,端口号]标识。The end-to-end transmission mode of the integrated network can use a connection-oriented transmission protocol or a best-effort transmission protocol, and the communication parties can choose according to their needs, but the transmission channel is identified by the [identity identifier, port number] of the communication parties.

3.1.1通信双方在同一接入网内的情景3.1.1 Scenarios where both communicating parties are in the same access network

如图6所示，不妨设通信发起方为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；通信接收方为B，其接入路由器为AR_B，其身份标识为B_ID，其在接入网X的位置标识为B_X-LOC。一体化网络传输模式遵循以下步骤：As shown in Figure 6, it is advisable to assume that the communication initiator is A, its access router is AR _A , its identity is A _ID , and its location in the access network X is A _X-LOC ; the communication receiver is B, Its access router is AR _B , its identity is B _ID , and its location in access network X is B _X-LOC . The all-in-one network transport mode follows these steps:

步骤1、A在得知B的身份标识后，发送报文到AR_A，报文头部的源身份标识为A_ID，目的身份标识为B_ID，用户侧只使用身份标识通信；Step 1. After learning the identity of B, A sends a message to AR _A , the source identity of the message header is A _ID , the destination identity is B _ID , and the user side only uses the identity for communication;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储B_ID与B_X-LOC的绑定关系，执行步骤3；否则，AR_A在报文头部的目的位置标识处填写B_X-LOC后向通信对端发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between B _ID and B _X-LOC , go to step 3; otherwise, AR _A fills in B _X-LOC in the destination location identifier of the message header and sends the message to the communication peer, and then Execute step 6;

步骤3：AR_A向接入网X位置映射系统询问B的B_X-LOC。Step 3: AR _A asks the access network X location mapping system for B's B _X-LOC .

步骤4：接入网X位置映射系统以B_ID为索引查询本地映射绑定关系，并返回给AR_A相应的B_X-LOC。Step 4: The access network X location mapping system uses the B _ID as an index to query the local mapping binding relationship, and returns the corresponding B _X-LOC to AR _A.

步骤5：AR_A将收到的B_X-LOC填写在报文头部中的目的位置标识处并向B发送报文；Step 5: AR _A fills the received B _X-LOC in the destination location identifier in the message header and sends the message to B;

步骤6：AR_B收到报文后，缓存下A_ID和A_X-LOC的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给B。Step 6: After AR _B receives the message, it caches the binding relationship between A _ID and A _X-LOC , removes the source and destination identifiers in the message header, and then forwards the message to B.

3.1.2通信双方在不同的接入网并且两个接入网直接通过某一核心网(地面核心网或空间核心网)互联的情景3.1.2 The two communication parties are in different access networks and the two access networks are directly interconnected through a certain core network (ground core network or space core network)

如图7所示，不妨设通信发起方为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与核心网Y的边界路由器为BR_X-Y，其在接入网X的位置标识为BR_{X-Y_LOC1}，其在核心网Y的位置标识为BR_{X-Y_LOC2}；互联核心网Y与接入网Z的边界路由器为BR_Y-Z，其在核心网Y位置标识为BR_{Y-Z_LOC1}，其在接入网Z的位置标识为BR_{Y-Z_LOC2}；通信接收方为B，其接入路由器为AR_B，其身份标识为B_ID，其在接入网Z的位置标识为B_Z-LOC。一体化网络端到端传输模式遵循以下步骤：As shown in Figure 7, it may be assumed that the communication initiator is A, its access router is AR _A , its identity is A _ID , and its location in access network X is A _X-LOC ; the interconnection access network X and The border router of the core network Y is BR _XY , its location in the access network X is identified as BR _{X-Y_LOC1} , and its location in the core network Y is identified as BR _{X-Y_LOC2} ; the boundary between the interconnected core network Y and the access network Z The router is BR _YZ , its location in the core network Y is identified as BR _{Y-Z_LOC1} , and its location in the access network Z is identified as BR _{Y-Z_LOC2} ; the communication receiver is B, and its access router is AR _B , and its identity is is B _ID , and its location in the access network Z is identified as B _Z-LOC . The integrated network end-to-end transmission mode follows the following steps:

步骤1、A在得知B的身份标识后，发送报文到AR_A，报文头部的源身份标识为A_ID，目的身份标识为B_ID，用户侧只使用身份标识通信；Step 1. After learning the identity of B, A sends a message to AR _A , the source identity of the message header is A _ID , the destination identity is B _ID , and the user side only uses the identity for communication;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储B_ID与BR_{X-Y_LOC1}的绑定关系，则执行步骤3；否则，AR_A在报文头部的目的位置标识处填写BR_{X-Y_LOC1}后向BR_X-Y发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between B _ID and BR _{X-Y_LOC1} , go to step 3; otherwise, AR _A fills in BR _{X-Y_LOC1} in the destination location identifier of the message header and sends the message to BR _XY , and then Execute step 6;

步骤3、AR_A向接入网X的位置映射系统询问B的B_X-LOC；Step 3, AR _A asks the location mapping system of the access network X for the B _X-LOC of B;

步骤4、接入网X的位置映射系统发现B不处于接入网内，需向核心网Y的位置映射系统查询，并返回给AR_A对应的BR_{X-Y_LOC1}；Step 4, the location mapping system of the access network X finds that B is not in the access network, and needs to query the location mapping system of the core network Y, and return to the BR _{X-Y_LOC1} corresponding to AR _A ;

步骤5、接入路由器收到后在报文头部中的目的位置标识处填写BR_{X-Y_LOC1}，并向BR_X-Y发送报文；Step 5. After receiving it, the access router fills in BR _{X-Y_LOC1} in the destination location identifier in the header of the message, and sends the message to BR _XY ;

步骤6、BR_X-Y收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y查询本地是否存有A和B相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤7；否则，BR_X-Y将报文头部中通信双方的位置标识替换为在核心网Y中对应的位置标识后转发报文至BR_Y-Z，之后执行步骤10；Step 6. After receiving the message, BR _XY needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _XY queries whether there is a binding relationship between A and B related identities and location identifiers locally, if there is no relevant information, go to step 7; otherwise, BR _XY replaces the location identifiers of both parties in the message header with the location identifiers in the core network Forward the message to BR _YZ after the corresponding location identifier in Y, and then perform step 10;

步骤7、BR_X-Y将A_ID与A_X-LOC进行绑定后缓存在本地的绑定关系列表中并将报文头部中的A_X-LOC替换BR_{X-Y_LOC2}；BR_X-Y向核心网Y的位置映射系统询问B的位置标识；Step 7, BR _XY binds A _ID and A _X-LOC and caches them in the local binding relationship list and replaces BR _{X -Y_LOC2} with A _X-LOC in the message header; B's location mapping system asks for B's location identification;

步骤8、核心网Y的位置映射系统以B_ID为索引查询本地映射绑定关系，并得到B所属接入网Z的网络编号；核心网Y的位置映射系统再以接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y-Z_LOC1}并返回给BR_X-Y；Step 8. The location mapping system of the core network Y uses B _ID as an index to query the local mapping binding relationship, and obtains the network number of the access network Z to which B belongs; the location mapping system of the core network Y uses the network number of the access network Z Query the local mapping binding relationship for the index, get BR _{Y-Z_LOC1} and return it to BR _XY ;

步骤9、BR_X-Y将BR_{Y-Z_LOC1}与B_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y在报文头部中的目的位置标识处填写BR_{Y-Z_LOC1}并向BR_Y-Z发送报文；Step 9, BR _XY binds BR _{Y-Z_LOC1} and B _ID and caches it in the local binding relationship list; BR _XY fills in BR _{Y-Z_LOC1} at the destination location identifier in the message header and sends the message to BR _YZ arts;

步骤10、BR_Y-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y-Z查询本地是否存有A和B相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤11；否则，BR_Y-Z将报文头部中通信双方的位置标识替换为在接入网Z中对应的位置标识后转发报文至AR_B，之后执行步骤14；Step 10, after receiving the message, BR _YZ needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _YZ inquires whether there is a binding relationship between the identities and location identifiers related to A and B locally. If there is no relevant information, go to step 11; otherwise, BR _YZ replaces the location identifiers of both parties in the message header with the forward the message to _ARB after identifying the corresponding location in network Z, and then perform step 14;

步骤11、BR_Y-Z将与A_ID与BR_{X-Y_LOC2}进行绑定后缓存在本地的绑定关系列表中并将报文头部中的BR_{X-Y_LOC2}替换BR_{Y-Z_LOC2}；BR_Y-Z向接入网Z的位置映射系统询问B的位置标识；Step 11, BR _YZ will be bound with A _ID and BR _{X-Y_LOC2} and cached in the local binding relationship list and replace BR _Y- Z_LOC2 with BR _{X-Y_LOC2} in the message header; BR _YZ will access The location mapping system of network Z inquires about the location identification of B;

步骤12、接入网Z的位置映射系统以B_ID为索引查询本地映射绑定关系，得到B_Z-LOC并返回给BR_Y-Z；Step 12, the location mapping system of the access network Z uses the B _ID as an index to query the local mapping binding relationship, obtains the B _Z-LOC and returns it to BR _YZ ;

步骤13、BR_Y-Z将B_Z-LOC与B_ID进行绑定后缓存在本地绑定关系列表中；BR_Y-Z在报文头部中的目的位置标识处填写B_Z-LOC并向B发送报文；Step 13, BR _YZ binds B _Z-LOC and B _ID and caches it in the local binding relationship list; BR _YZ fills in B _Z-LOC at the destination location identifier in the message header and sends the message to B ;

步骤14、AR_B收到报文后，缓存下A_ID和BR_{Y-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给B。Step 14: After AR _B receives the message, it caches the binding relationship between A _ID and _{BRY-Z_LOC2} , removes the source and destination identifiers in the message header, and then forwards the message to B.

3.1.3通信一方位于与地面核心网相连的接入网，另一方通过LEO卫星或GEO卫星直接接入空间核心网情景3.1.3 The communication party is located in the access network connected to the ground core network, and the other party directly accesses the space core network through LEO satellite or GEO satellite

在此情景下，通信另一方通常为陆地、海洋、航空、航天、深空等无法组网的单一通信实体，空间核心网需作为其接入网络，保证其通信的畅通。此时，可将空间核心网视为地面核心网的接入网，执行3.1.2所述一体化网络端到端传输模式。In this scenario, the other party of communication is usually a single communication entity that cannot be networked on land, ocean, aviation, aerospace, deep space, etc., and the space core network needs to be used as its access network to ensure smooth communication. At this time, the space core network can be regarded as the access network of the terrestrial core network, and the integrated network end-to-end transmission mode described in 3.1.2 is implemented.

3.1.4通信双方在不同的接入网并且两个接入网通过地面核心网和空间核心网互联的情景3.1.4 The two communication parties are in different access networks and the two access networks are interconnected through the ground core network and the space core network

如图8所示，不妨设通信发起方为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与核心网Y1的边界路由器为BR_X-Y1，其在接入网X位置标识为BR_{X-Y1_LOC1}，其在核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联核心网Y1与核心网Y2的边界路由器为BR_Y1-Y2，其在核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；互联核心网Y2与接入网Z的边界路由器为BR_Y2-Z，其在核心网Y2位置标识为BR_{Y2-Z_LOC1}，其在接入网Z的位置标识为BR_{Y2-Z_LOC2}；通信接收方为B，其接入路由器为AR_B，其身份标识为B_ID，其在接入网Z的位置标识为B_Z-LOC。一体化网络端到端传输模式遵循以下步骤：As shown in Figure 8, it is advisable to assume that the communication initiator is A, its access router is AR _A , its identity is A _ID , and its location in access network X is A _X-LOC ; the interconnection access network X and The border router of the core network Y1 is BR _X-Y1 , its position in the access network X is marked as BR _{X-Y1_LOC1} , and its position in the core network Y1 is marked as BR _{X-Y1_LOC2} ; the boundary between the core network Y1 and the core network Y2 is interconnected The router is BR _Y1-Y2 , its location in the core network Y1 is identified as BR _{Y1-Y2_LOC1} , and its location in the core network Y2 is identified as BR _{Y1-Y2_LOC2} ; the border router between the interconnected core network Y2 and the access network Z is BR _{Y2 -Z} , its location in the core network Y2 is identified as BR _{Y2-Z_LOC1} , its location in the access network Z is identified as BR _{Y2-Z_LOC2} ; the communication receiver is B, its access router is AR _B , and its identity is B _ID , its location in the access network Z is identified as B _Z-LOC . The integrated network end-to-end transmission mode follows the following steps:

步骤1、A在得知B的身份标识后，发送报文到AR_A，报文头部的源身份标识为A_ID，目的身份标识为B_ID，用户侧只使用身份标识通信；Step 1. After learning the identity of B, A sends a message to AR _A , the source identity of the message header is A _ID , the destination identity is B _ID , and the user side only uses the identity for communication;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储B_ID与BR_{X-Y1_LOC1}的绑定关系，则执行步骤3；否则，AR_A在报文头部的目的位置标识处填写BR_{X-Y1_LOC1}后向BR_X-Y1发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between B _ID and BR _{X-Y1_LOC1} , go to step 3; otherwise, AR _A fills in BR _{X-Y1_LOC1} in the destination location identifier of the message header and sends the message to BR _X-Y1 , and then perform step 6;

步骤3、AR_A向接入网X的位置映射系统询问B的B_X-LOC；Step 3, AR _A asks the location mapping system of the access network X for the B _X-LOC of B;

步骤4、接入网X的位置映射系统以B_ID为索引查询本地映射绑定关系，发现B不处于接入网内，需向核心网Y1的位置映射系统查询，并返回给AR_A对应的BR_{X-Y1_LOC1}；Step 4. The location mapping system of access network X uses B _ID as an index to query the local mapping binding relationship, and finds that B is not in the access network, so it needs to query the location mapping system of core network Y1 and return it to AR _A corresponding BR _{X-Y1_LOC1} ;

步骤5、接入路由器收到后在报文头部中的目的位置标识处填写BR_{X-Y1_LOC1}，并向BR_X-Y1发送报文；Step 5. After receiving it, the access router fills in BR _{X-Y1_LOC1} in the destination location identifier in the message header, and sends the message to BR _X-Y1 ;

步骤6、BR_X-Y1收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y1查询本地是否存有A和B相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤7；否则，BR_X-Y1将报文头部中通信双方的位置标识替换为在核心网Y1中对应的位置标识后转发报文至BR_Y1-Y2，之后执行步骤10；Step 6. After receiving the message, BR _X-Y1 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _{X-Y1 checks} whether there is a binding relationship between A and B related identities and location identifiers locally, if there is no relevant information, go to step 7; otherwise, BR _X-Y1 replaces the location identifiers of both parties in the message header To forward the message to _BRY1-Y2 after identifying the corresponding location in the core network Y1, and then perform step 10;

步骤7、BR_X-Y1将A_ID与A_X-LOC进行绑定后缓存在本地的绑定关系列表中并将报文头部中的A_X-LOC替换BR_{X-Y1_LOC2}；BR_X-Y1向核心网Y1的位置映射系统询问B的位置标识；Step 7, BR _X-Y1 binds A _ID and A _X-LOC and caches them in the local binding relationship list and replaces BR _{X-Y1_LOC2} with A _X-LOC in the message header; BR _X-Y1 Ask the location mapping system of the core network Y1 for the location identifier of B;

步骤8、(a)如果核心网Y1为地面核心网，地面核心网Y1的位置映射系统以B_ID为索引查询本地映射绑定关系，并得到B对应的空间核心网Y2的网络编号；地面核心网Y1的位置映射系统再以空间核心网Y2的网络编号为索引查询本地映射绑定关系，得到BR_{Y1-Y2_LOC1}并返回给BR_X-Y1；(b)如果核心网Y1为空间核心网，空间核心网Y1的位置映射系统以B_ID为索引查询本地映射绑定关系，发现没有B的相关条目，则需向地面核心网Y2查询，将BR_{Y1-Y2_LOC1}返回给BR_X-Y1；Step 8, (a) If the core network Y1 is a terrestrial core network, the location mapping system of the terrestrial core network Y1 uses B _ID as an index to query the local mapping binding relationship, and obtains the network number of the space core network Y2 corresponding to B; The location mapping system of the network Y1 takes the network number of the space core network Y2 as an index to query the local mapping binding relationship, obtains BR _{Y1-Y2_LOC1} and returns to BR _X-Y1 ; (b) if the core network Y1 is a space core network, the space The location mapping system of the core network Y1 uses the B _ID as an index to query the local mapping binding relationship. If there is no relevant entry for B, it needs to query the ground core network Y2 and return BR _{Y1-Y2_LOC1} to BR _X-Y1 ;

步骤9、BR_X-Y1将BR_{Y1-Y2_LOC1}与B_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y1在报文头部中的目的位置标识处填写BR_{Y1-Y2_LOC1}并向BR_Y1-Y2发送报文；Step 9, BR _X-Y1 binds BR _{Y1-Y2_LOC1} and B _ID and caches it in the local binding relationship list; BR _X-Y1 fills in BR _{Y1-Y2_LOC1} at the destination location identifier in the message header and sends BR _Y1-Y2 send messages;

步骤10、BR_Y1-Y2收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y1-Y2查询本地是否存有A和B相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤11；否则，BR_Y1-Y2将报文头部中通信双方的位置标识替换为在核心网Y2中对应的位置标识后转发报文至BR_Y2-Z，之后执行步骤14；Step 10, after receiving the message, BR _Y1-Y2 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _{Y1-Y2 checks} whether there is a binding relationship between A and B related identities and location identifiers locally, if there is no relevant information, go to step 11; otherwise, BR _Y1-Y2 replaces the location identifiers of both parties in the message header To forward the message to _BRY2-Z after identifying the corresponding location in the core network Y2, and then perform step 14;

步骤11、BR_Y1-Y2将A_ID与BR_{X-Y1_LOC2}进行绑定后缓存在本地的绑定关系列表中并将报文头部中的BR_{X-Y1_LOC2}替换BR_{Y1-Y2_LOC2}；BR_Y1-Y2向核心网Y2的位置映射系统询问B的位置标识；Step 11, BR _Y1-Y2 binds the A _ID with BR _{X-Y1_LOC2} and caches it in the local binding relationship list and replaces BR _{X-Y1_LOC2} in the message header with BR _{Y1-Y2_LOC2} ; BR _Y1-Y2 Ask the location mapping system of the core network Y2 for the location identifier of B;

步骤12、核心网Y2的位置映射系统以B_ID为索引查询本地映射绑定关系，并得到B所属接入网Z的网络编号；核心网Y2的位置映射系统再以接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y2-Z_LOC1}并返回给BR_Y2-Z；Step 12. The location mapping system of the core network Y2 uses B _ID as an index to query the local mapping binding relationship, and obtains the network number of the access network Z to which B belongs; the location mapping system of the core network Y2 uses the network number of the access network Z Query the local mapping binding relationship for the index, get BR _{Y2-Z_LOC1} and return it to BR _Y2-Z ;

步骤13、BR_Y1-Y2将BR_{Y2-Z_LOC1}与B_ID进行绑定后缓存在本地绑定关系列表中；BR_Y1-Y2在报文头部中的目的位置标识处填写BR_{Y2-Z_LOC1}并向BR_Y2-Z发送报文；Step 13, BR _Y1-Y2 binds BR _{Y2-Z_LOC1} and B _ID and caches it in the local binding relationship list; BR _Y1-Y2 fills in BR _{Y2-Z_LOC1} at the destination location identifier in the message header and sends BR _Y2-Z sends a message;

步骤14、BR_Y2-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y2-Z查询本地是否存有A和B相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤15；否则，BR_Y2-Z将报文头部中通信双方的位置标识替换为在接入网Z中对应的位置标识后转发报文至AR_B，之后执行步骤18；Step 14: After receiving the message, BR _Y2-Z needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y2-Z queries whether there is a binding relationship between A and B related identities and location identifiers locally, if there is no relevant information, go to step 15; otherwise, BR _Y2-Z replaces the location identifiers of both parties in the message header To forward the message to _ARB after identifying the corresponding location in the access network Z, and then perform step 18;

步骤15、BR_Y2-Z将A_ID与BR_{Y1-Y2_LOC2}进行绑定后缓存在本地的绑定关系列表中并将报文头部中的BR_{Y1-Y2_LOC2}替换BR_{Y2-Z_LOC2}；BR_Y2-Z向接入网Z的位置映射系统询问B的位置标识；Step 15, BR _Y2-Z binds the A _ID with BR _{Y1-Y2_LOC2} and caches it in the local binding relationship list and replaces BR _{Y1-Y2_LOC2} in the message header with BR _{Y2-Z_LOC2} ; BR _Y2-Z Ask the location mapping system of the access network Z for the location identifier of B;

步骤16、接入网Z的位置映射系统以B_ID为索引查询本地映射绑定关系，得到B_Z-LOC并返回给BR_Y2-Z；Step 16, the location mapping system of the access network Z uses the B _ID as an index to query the local mapping binding relationship, obtains the B _Z-LOC and returns it to BR _Y2-Z ;

步骤17、BR_Y2-Z将B_Z-LOC与B_ID进行绑定后缓存在本地绑定关系列表中；BR_Y2-Z在报文头部中的目的位置标识处填写B_Z-LOC并向B发送报文；Step 17, BR _Y2-Z binds B _Z-LOC and B _ID and caches it in the local binding relationship list; BR _Y2-Z fills in B _Z-LOC at the destination location identifier in the message header and sends it to B sends a message;

步骤18、AR_B收到报文后，缓存下A_ID和BR_{Y2-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给B。Step 18: After AR _B receives the message, it caches the binding relationship between A _ID and _{BRY2-Z_LOC2} , removes the source and destination identifiers in the message header, and then forwards the message to B.

3.2、用户请求服务内容方法3.2. Method for user to request service content

用户请求服务内容共有两个过程，即服务查询过程与服务传输过程。There are two processes for users to request service content, namely, service query process and service transmission process.

3.2.1服务查询过程3.2.1 Service query process

服务查询过程用于处理用户的模糊查询。用户通过发送关键字给服务查询系统来获得服务标识及对应的服务器身份标识。若本地服务查询系统可以满足要求，则直接返回相关信息，否则，通过查询核心网服务查询系统获得最终结果。若用户通过其它方式获知服务标识和服务器身份标识，该步骤可以省略。The service query process is used to process fuzzy queries from users. The user obtains the service ID and the corresponding server ID by sending keywords to the service query system. If the local service query system can meet the requirements, the relevant information will be directly returned; otherwise, the final result will be obtained by querying the core network service query system. This step can be omitted if the user obtains the service ID and server ID through other means.

如图9所示，不妨设用户为A，其接入路由器为AR_A；服务标识为SID，服务器身份标识为Server_ID，服务描述信息为SDI，服务器所属接入网的网络编号为Net-ID；互联接入网X与核心网Y1的边界路由器为BR_X-Y1；互联核心网Y1与核心网Y2的边界路由器为BR_Y1-Y2。As shown in Figure 9, it may be assumed that the user is A, and its access router is AR _A ; the service identifier is SID, the server identity identifier is Server _ID , the service description information is SDI, and the network number of the access network to which the server belongs is Net-ID ; The border router interconnecting the access network X and the core network Y1 is BR _X-Y1 ; the border router interconnecting the core network Y1 and the core network Y2 is BR _Y1-Y2 .

用户的服务查询过程遵循以下步骤：The user's service inquiry process follows the following steps:

步骤1、A发送服务查询请求报文至AR_A，报文含关键字信息；Step 1. A sends a service query request message to AR _A , and the message contains keyword information;

步骤2、AR_A在原报文头部添加对应身份标识的位置标识后向接入网X的服务查询系统转发；Step 2, AR _A forwards to the service query system of the access network X after adding the location identifier corresponding to the identity identifier in the header of the original message;

步骤3、接入网X的服务查询系统查询本地服务信息，如果不存在对应的服务信息，则执行步骤4；否则，接入网X的服务查询系统返回AR_A一系列对应的服务信息，其中，服务信息包括SID、Server_ID、SDI以及Net-ID，之后执行步骤12；Step 3. The service query system of access network X queries the local service information. If there is no corresponding service information, then perform step 4; otherwise, the service query system of access network X returns _a series of corresponding service information of ARA, wherein , the service information includes SID, Server _ID , SDI and Net-ID, and then perform step 12;

步骤4、接入网X的服务查询系统需向核心网Y1的服务查询系统发起服务查询过程，并将请求报文发送至BR_X-Y1；Step 4, the service query system of the access network X needs to initiate a service query process to the service query system of the core network Y1, and send the request message to BR _X-Y1 ;

步骤5、BR_X-Y1将请求报文发往核心网Y1的服务查询系统；Step 5, BR _X-Y1 sends the request message to the service query system of the core network Y1;

步骤6、核心网Y1的服务查询系统查询本地服务信息，如果不存在对应的服务信息，则说明核心网Y1为空间核心网，执行步骤7；否则核心网Y1的服务查询系统返回BR_X-Y1一系列对应的服务信息，其中服务信息包括SID、Server_ID、SDI以及Net-ID，之后，执行步骤11；Step 6. The service query system of the core network Y1 queries the local service information. If there is no corresponding service information, it means that the core network Y1 is a space core network, and go to step 7; otherwise, the service query system of the core network Y1 returns BR _X-Y1 A series of corresponding service information, wherein the service information includes SID, Server _ID , SDI and Net-ID, after that, perform step 11;

步骤7、空间核心网Y1的服务查询系统需向地面核心网Y2的服务查询系统发起服务查询过程，并将请求报文发送至BR_Y1-Y2；Step 7, the service query system of the space core network Y1 needs to initiate a service query process to the service query system of the ground core network Y2, and send the request message to BR _Y1-Y2 ;

步骤8、BR_Y1-Y2将请求报文发往地面核心网Y2的服务查询系统；Step 8, BR _Y1-Y2 sends the request message to the service query system of the ground core network Y2;

步骤9、地面核心网Y2的服务查询系统查询本地服务信息并返回BR_Y1-Y2一系列对应的服务信息，其中服务信息包括SID、Server_ID、SDI以及Net-ID；Step 9. The service query system of the terrestrial core network Y2 queries the local service information and returns a series of corresponding service information of BR _Y1-Y2 , wherein the service information includes SID, Server _ID , SDI and Net-ID;

步骤10、BR_Y1-Y2将所得报文返回BR_X-Y1；Step 10, BR _Y1-Y2 returns the obtained message to BR _X-Y1 ;

步骤11、BR_X-Y1将所得报文返回AR_A；Step 11, BR _X-Y1 returns the obtained message to AR _A ;

步骤12、AR_A去掉报文头部中的位置标识后将报文转发给A。Step 12, AR _A removes the location identifier in the message header and forwards the message to A.

3.2.2服务传输过程3.2.2 Service transmission process

3.2.2.1用户所选服务器与用户所处接入网相同的情景3.2.2.1 The scenario where the server selected by the user is the same as the access network where the user is located

如图10所示，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；服务器为Server，其接入路由器为AR_S，其身份标识为Server_ID，其在接入网X的位置标识为Server_X-LOC，其提供的服务内容的服务标识为SID。用户的服务传输过程遵循以下步骤：As shown in Figure 10, it may be advisable to set user A, whose access router is AR _A , whose identity is A _ID , whose location in access network X is identified as A _X-LOC ; the server is Server, whose access router It is _ARS , its identity is Server _ID , its location in access network X is Server _X-LOC , and the service content of the service it provides is SID. The user's service transfer process follows the following steps:

步骤1、A发送服务内容请求报文至AR_A，报文头部包含SID、A_ID以及Server_ID；Step 1, A sends a service content request message to AR _A , and the message header includes SID, A _ID and Server _ID ;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储Server_ID与Server_X-LOC的绑定关系，则执行步骤3；否则，AR_A在报文头部的目的位置标识处填写Server_X-LOC后向Server发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between Server _ID and Server _X-LOC , execute step 3; otherwise, AR _A fills in Server _X-LOC in the destination location identifier of the message header, sends the message to the server, and then executes Step 6;

步骤3、AR_A向接入网X的位置映射系统查询Server_ID所对应的Server_X-LOC；Step 3, AR _A queries the Server _X-LOC corresponding to the Server _ID to the location mapping system of the access network X;

步骤4、接入网X的位置映射系统查询本地绑定关系，返回Server_LOC给AR_A；Step 4, the location mapping system of the access network X queries the local binding relationship, and returns Server _LOC to _ARA ;

步骤5、AR_A在A所发送报文头部中添加对应的位置标识后将报文发往Server；Step 5, AR _A adds the corresponding location identifier in the header of the message sent by A, and then sends the message to the server;

步骤6、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给AR_A，之后执行10；否则路由器将服务内容请求报文继续向Server转发；Step 6. After the router along the route receives the request message, it uses the SID as an index to query the local SID cache list. If there is relevant service content, the router returns the service content to _ARA , and then executes 10; otherwise, the router sends the service content request message Continue to forward to Server;

步骤7、服务内容请求报文到达AR_S，(假设AR_S没有缓存相关服务内容，否则执行步骤6)，AR_S缓存下A_ID和A_X-LOC的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给Server；Step 7, the service content request message arrives at _ARS , (assuming that ARS does not cache relevant service content, otherwise perform step 6), ARS caches the binding relationship between _{A ID} and _{A X-LOC} , and removes the message header The source and destination location identifiers in the packet are then forwarded to the Server;

步骤8、Server返回服务内容给AR_S，报文头部包含SID、Server_ID以及A_ID；Step 8, Server returns the service content to ARS, and the message header includes SID, Server _ID and _{A ID} ;

步骤9、AR_S在Server所发送报文头部中添加对应的位置标识后将报文发往A，沿途路由器转发报文并按需缓存服务内容；Step 9, AR _S adds the corresponding location identifier in the header of the message sent by the Server, and then sends the message to A, and the routers along the way forward the message and cache the service content as needed;

步骤10、AR_A收到服务内容后，去掉报文头部中的源和目的位置标识后再将报文转发给A。Step 10: After receiving the service content, AR _A removes the source and destination identifiers in the message header and then forwards the message to A.

3.2.2.2用户与服务器在不同的接入网并且两个接入网直接通过某一核心网(地面核心网或空间核心网)互联的情景3.2.2.2 The scenario where the user and the server are on different access networks and the two access networks are directly interconnected through a certain core network (ground core network or space core network)

如图11所示，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与核心网Y的边界路由器为BR_X-Y，其在接入网X的位置标识为BR_{X-Y_LOC1}，其在核心网Y的位置标识为BR_{X-Y_LOC2}；互联核心网Y与接入网Z的边界路由器为BR_Y-Z，其在核心网Y位置标识为BR_{Y-Z_LOC1}，其在接入网Z的位置标识为BR_{Y-Z_LOC2}；服务器为Server，其接入路由器为AR_S，其身份标识为Server_ID，其在接入网Z的位置标识为Server_Z-LOC，其提供的服务内容的服务标识为SID。用户的服务传输过程遵循以下步骤：As shown in Figure 11, it is advisable to set user A, its access router as AR _A , its identity as A _ID , and its location in access network X as A _X-LOC ; The border router of Y is BR _XY , its location in the access network X is identified as BR _{X-Y_LOC1} , and its location in the core network Y is identified as BR _{X-Y_LOC2} ; the border router interconnecting the core network Y and the access network Z is BR _YZ , its position in the core network Y is identified as BR _{Y-Z_LOC1} , and its position in the access network Z is identified as BR _{Y-Z_LOC2} ; the server is Server, its access router is _ARS , and its identity is Server _ID , Its location identifier in the access network Z is Server _Z-LOC , and the service identifier of the service content it provides is SID. The user's service transfer process follows the following steps:

步骤1、A发送服务内容请求报文至AR_A，报文头部包含SID、A_ID以及Server_ID；Step 1, A sends a service content request message to AR _A , and the message header includes SID, A _ID and Server _ID ;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储Server_ID与Server_X-LOC的绑定关系，则执行步骤3；否则，AR_A在报文头部的目的位置标识处填写Server_X-LOC后向Server发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between Server _ID and Server _X-LOC , execute step 3; otherwise, AR _A fills in Server _X-LOC in the destination location identifier of the message header, sends the message to the server, and then executes Step 6;

步骤3、AR_A向接入网X的位置映射系统查询Server_ID所对应的Server_X-LOC；Step 3, AR _A queries the Server _X-LOC corresponding to the Server _ID to the location mapping system of the access network X;

步骤4、接入网X的位置映射系统查询本地绑定关系，发现Server不处于接入网，须向核心网Y的位置映射系统查询，返回BR_{X-Y_LOC1}给AR_A；Step 4, the location mapping system of access network X queries the local binding relationship, finds that Server is not in the access network, must query the location mapping system of core network Y, and returns BR _{X -Y_LOC1} to ARA;

步骤5、AR_A在A所发送报文头部中添加对应的位置标识后将报文发往BR_X-Y；Step 5, AR _A sends the message to BR _XY after adding the corresponding location identifier in the message header sent by A;

步骤6、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给AR_A，沿途路由器转发报文并按需缓存服务内容，之后执行步骤22；否则路由器将服务内容请求报文继续向BR_X-Y转发；Step 6. After receiving the request message, the router along the route queries the local SID cache list with the SID as an index. If there is relevant service content, the router returns the service content to _ARA , and the router along the route forwards the message and caches the service content as needed. Then execute step 22; otherwise, the router will continue to forward the service content request message to BR _XY ;

步骤7、服务内容请求报文到达BR_X-Y后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y查询本地是否存有A和Server相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤8；否则，BR_X-Y将报文头部中A和Server的位置标识替换为在核心网Y中对应的位置标识后转发报文至BR_Y-Z，之后执行步骤11；Step 7. After the service content request message arrives at BR _XY , it is necessary to rewrite the source location identifier and destination location identifier of the message header. BR _XY inquires whether there is an identity and location identification binding relationship between A and Server locally. If there is no relevant information, go to step 8; otherwise, BR _XY replaces the location identification of A and Server in the message header with the forward the message to BR _YZ after identifying the corresponding location in network Y, and then perform step 11;

步骤8、BR_X-Y将A_ID与A_X-LOC进行绑定后缓存在本地的绑定关系列表中，并将报文头部中的A_X-LOC替换BR_{X-Y_LOC2}；BR_X-Y向核心网Y的位置映射系统询问Server的位置标识；Step 8, BR _XY binds A _ID and A _X-LOC and caches them in the local binding relationship list, and replaces BR _{X-Y_LOC2} with A _X-LOC in the header of the message; BR _XY sends a message to the core network Y's location mapping system inquires about the server's location identifier;

步骤9、核心网Y的位置映射系统以Server_ID为索引查询本地映射绑定关系，并得到Server所属接入网Z的网络编号；核心网Y的位置映射系统再以接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y-Z_LOC1}并返回给BR_X-Y；Step 9. The location mapping system of the core network Y uses the Server _ID as an index to query the local mapping binding relationship, and obtains the network number of the access network Z to which the Server belongs; the location mapping system of the core network Y uses the network number of the access network Z Query the local mapping binding relationship for the index, get BR _{Y-Z_LOC1} and return it to BR _XY ;

步骤10、BR_X-Y将BR_{Y-Z_LOC1}与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y在报文头部中的目的位置标识处填写BR_{Y-Z_LOC1}并向BR_Y-Z发送报文；Step 10, BR _XY binds BR _{Y-Z_LOC1} and Server _ID and caches it in the local binding relationship list; BR _XY fills in BR _{Y-Z_LOC1} at the destination location identifier in the message header and sends a message to BR _YZ arts;

步骤11、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_X-Y，沿途路由器转发报文并按需缓存服务内容，之后执行步骤21；否则路由器将服务内容请求报文继续向BR_Y-Z转发；Step 11. After receiving the request message, the router along the route queries the local SID cache list with the SID as an index. If there is relevant service content, the router returns the service content to BR _XY , and the router along the route forwards the message and caches the service content as needed. Execute step 21 afterwards; Otherwise the router will continue to forward the service content request message to BR _YZ ;

步骤12、BR_Y-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y-Z查询本地是否存有A和Server相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤13；否则，BR_Y-Z将报文头部中A和Server的位置标识替换为在接入网Z中对应的位置标识后转发报文至AR_S，之后执行步骤16；Step 12: After receiving the message, BR _YZ needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _YZ queries whether there is an identity and location identifier binding relationship between A and Server locally. If there is no relevant information, go to step 13; otherwise, BR _YZ replaces the location identifier of A and Server in the message header with the After accessing the corresponding location identifier in the network Z, forward the message to _ARS , and then perform step 16;

步骤13、BR_Y-Z将与A_ID与BR_{X-Y_LOC2}进行绑定后缓存在本地的绑定关系列表中，并将报文头部中的BR_{X-Y_LOC2}替换BR_{Y-Z_LOC2}；之后，BR_Y-Z向接入网Z的位置映射系统询问Server的位置标识；Step 13, BR _YZ will be bound with A _ID and BR _{X-Y_LOC2} and cached in the local binding relationship list, and replace BR _Y- Z_LOC2 with BR _{X-Y_LOC2} in the message header; after that, BR _YZ Ask the location mapping system of the access network Z for the location identifier of the Server;

步骤14、接入网Z的位置映射系统以Server_ID为索引查询本地映射绑定关系，得到Server_Z-LOC并返回给BR_Y-Z；Step 14, the location mapping system of the access network Z takes the Server _ID as an index to query the local mapping binding relationship, obtains the Server _Z-LOC and returns it to BR _YZ ;

步骤15、BR_Y-Z将Server_Z-LOC与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_Y-Z在报文头部中的目的位置标识处填写Server_Z-LOC并向Server发送报文；Step 15, BR _YZ binds the Server _Z-LOC and the Server _ID and caches it in the local binding relationship list; BR _YZ fills in the Server _Z-LOC at the destination location identifier in the message header and sends the message to the Server ;

步骤16、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_Y-Z，沿途路由器转发报文并按需缓存服务内容，之后执行步骤20；否则路由器将服务内容请求报文继续向Server转发；Step 16: After the router along the route receives the request message, it uses the SID as an index to query the local SID cache list. If there is relevant service content, the router returns the service content to _BRYZ , and the router along the route forwards the message and caches the service content as needed. Then perform step 20; otherwise, the router continues to forward the service content request message to the Server;

步骤17、服务内容请求报文到达AR_S，(假设AR_S没有缓存相关服务内容，否则执行步骤6)，AR_S缓存下A_ID和BR_{Y-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给Server；Step 17, the service content request message arrives at ARS, (assuming that ARS does not cache relevant service content, otherwise perform step 6), ARS caches the binding relationship between _{A ID} and _{BRY -Z_LOC2 ,} and removes the message header The source and destination location identifiers in the packet are then forwarded to the Server;

步骤18、Server返回服务内容给AR_S，报文头部包含SID、Server_ID以及A_ID；Step 18, Server returns the service content to ARS, and the message header includes SID, Server _ID and _{A ID} ;

步骤19、AR_S在Server所发送报文头部中添加对应的位置标识后将报文发往BR_Y-Z，沿途路由器转发报文并按需缓存服务内容；Step 19, _{ARS adds the corresponding location identifier in the header of the message sent by the Server, and then sends the message to BRYZ ,} and the routers along the way forward the message and cache the service content as needed;

步骤20、BR_Y-Z将报文发往BR_X-Y，沿途路由器转发报文并按需缓存服务内容；Step 20, BR _YZ sends the message to BR _XY , and the routers along the way forward the message and cache the service content as needed;

步骤21、BR_X-Y将报文发往AR_A，沿途路由器转发报文并按需缓存服务内容；Step 21, BR _XY sends the message to _ARA , and the routers along the way forward the message and cache the service content as needed;

步骤22、AR_A收到服务内容后，去掉报文头部中的源和目的位置标识后再将报文转发给A。Step 22. After receiving the service content, AR _A removes the source and destination identifiers in the message header and then forwards the message to A.

3.2.2.3通信一方位于与地面核心网相连的接入网，另一方通过LEO卫星或GEO卫星直接接入空间核心网情景3.2.2.3 The communication party is located in the access network connected to the ground core network, and the other party directly accesses the space core network through LEO satellite or GEO satellite

在此情景下，通信另一方通常为陆地、海洋、航空、航天、深空等无法组网的单一服务器或用户，空间核心网需作为其接入网络，保证其通信的畅通。此时，可将空间核心网视为地面核心网的接入网，执行3.2.2.2所述服务传输过程。In this scenario, the other party of communication is usually a single server or user that cannot be networked on land, ocean, aviation, aerospace, deep space, etc., and the space core network needs to be used as its access network to ensure smooth communication. At this time, the space core network can be regarded as the access network of the terrestrial core network, and the service transmission process described in 3.2.2.2 is performed.

3.2.2.4通信双方在不同的接入网并且两个接入网通过地面核心网和空间核心网互联的情景3.2.2.4 The two communication parties are in different access networks and the two access networks are interconnected through the ground core network and the space core network

如图12所示，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在接入网X的位置标识为A_X-LOC；互联接入网X与核心网Y1的边界路由器为BR_X-Y1，其在接入网X位置标识为BR_{X-Y1_LOC1}，其在核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联核心网Y1与核心网Y2的边界路由器为BR_Y1-Y2，其在核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；互联核心网Y2与接入网Z的边界路由器为BR_Y2-Z，其在核心网Y2位置标识为BR_{Y2-Z_LOC1}，其在接入网Z的位置标识为BR_{Y2-Z_LOC2}；服务器为Server，其接入路由器为AR_S，其身份标识为Server_ID，其在接入网Z的位置标识为Server_Z-LOC，其提供的服务内容的服务标识为SID。用户的服务传输过程遵循以下步骤：As shown in Figure 12, it is advisable to set user A, its access router as AR _A , its identity as A _ID , and its location in access network X as A _X-LOC ; The border router of Y1 is BR _X-Y1 , its position on the access network X is marked as BR _{X-Y1_LOC1} , and its position on the core network Y1 is marked as BR _{X-Y1_LOC2} ; the border router interconnecting core network Y1 and core network Y2 is BR _Y1-Y2 , its location in the core network Y1 is identified as BR _{Y1-Y2_LOC1} , and its location in the core network Y2 is identified as BR _{Y1-Y2_LOC2} ; the border router interconnecting the core network Y2 and the access network Z is BR _Y2-Z , its position in the core network Y2 is marked as BR _{Y2-Z_LOC1} , and its position in the access network Z is marked as BR _{Y2-Z_LOC2} ; the server is Server, its access router is _ARS , its identity is Server _ID , and its The location identifier of the access network Z is Server _Z-LOC , and the service identifier of the service content it provides is SID. The user's service transfer process follows the following steps:

步骤1、A发送服务内容请求报文至AR_A，报文头部包含SID、A_ID以及Server_ID；Step 1, A sends a service content request message to AR _A , and the message header includes SID, A _ID and Server _ID ;

步骤2、AR_A在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为A接入时AR_A为其分配的A_X-LOC。如果AR_A没有存储Server_ID与Server_X-LOC的绑定关系，则执行步骤3；否则，AR_A在报文头部的目的位置标识处填写Server_X-LOC后向Server发送报文，之后执行步骤6；Step 2, AR _A needs to add a source location identifier and a destination location identifier in the header of the message on the basis of the original message. The source location identifier is A _X-LOC allocated by AR _A when A accesses. If AR _A does not store the binding relationship between Server _ID and Server _X-LOC , execute step 3; otherwise, AR _A fills in Server _X-LOC in the destination location identifier of the message header, sends the message to the server, and then executes Step 6;

步骤3、AR_A向接入网X的位置映射系统查询Server_ID所对应的Server_X-LOC；Step 3, AR _A queries the Server _X-LOC corresponding to the Server _ID to the location mapping system of the access network X;

步骤4、接入网X的位置映射系统查询本地绑定关系，发现Server不处于接入网，须向核心网Y1的位置映射系统查询，返回BR_{X-Y1_LOC1}给AR_A；Step 4, the location mapping system of access network X queries the local binding relationship, finds that Server is not in the access network, must query the location mapping system of core network Y1, and returns BR _{X -Y1_LOC1} to ARA;

步骤5、AR_A在A所发送报文头部中添加对应的位置标识后将报文发往BR_X-Y1；Step 5, AR _A sends the message to BR _X-Y1 after adding the corresponding location identifier in the message header sent by A;

步骤6、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给AR_A，沿途路由器转发报文并按需缓存服务内容，之后执行步骤28；否则路由器将服务内容请求报文继续向BR_X-Y1转发；Step 6. After receiving the request message, the router along the route queries the local SID cache list with the SID as an index. If there is relevant service content, the router returns the service content to _ARA , and the router along the route forwards the message and caches the service content as needed. Then execute step 28; otherwise, the router will continue to forward the service content request message to BR _X-Y1 ;

步骤7、服务内容请求报文到达BR_X-Y1后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y1查询本地是否存有A和Server相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤8；否则，BR_X-Y1将报文头部中A和Server的位置标识替换为在核心网Y1中对应的位置标识后转发报文至BR_Y1-Y2，之后执行步骤11；Step 7: After the service content request message arrives at BR _X-Y1 , it is necessary to rewrite the source location identifier and destination location identifier of the message header. BR _X-Y1 inquires whether there is an identity and location identification binding relationship between A and Server locally, and if there is no relevant information, go to step 8; otherwise, BR _X-Y1 puts the location identification of A and Server in the message header Replace it with the corresponding location identifier in the core network Y1 and forward the message to _BRY1-Y2 , and then perform step 11;

步骤8、BR_X-Y1将A_ID与A_X-LOC进行绑定后缓存在本地的绑定关系列表中，并将报文头部中的A_X-LOC替换BR_{X-Y1_LOC2}；BR_X-Y1向核心网Y1的位置映射系统询问Server的位置标识；Step 8, BR _X-Y1 binds A _ID and A _X-LOC and caches them in the local binding relationship list, and replaces BR _{X-Y1_LOC2} with A _X-LOC in the message header; BR _X -LOC _Y1 asks the location mapping system of the core network Y1 for the location identifier of the Server;

步骤9、(a)如果核心网Y1为地面核心网，地面核心网Y1的位置映射系统以Server_ID为索引查询本地映射绑定关系，并得到Server对应的空间核心网Y2的网络编号；地面核心网Y1的位置映射系统再以空间核心网Y2的网络编号为索引查询本地映射绑定关系，得到BR_{Y1-Y2_LOC1}并返回给BR_X-Y1；(b)如果核心网Y1为空间核心网，空间核心网Y1的位置映射系统以Server_ID为索引查询本地映射绑定关系，发现没有Server的相关条目，则需向地面核心网Y2查询，将BR_{Y1-Y2_LOC1}返回给BR_X-Y1；Step 9, (a) If the core network Y1 is a terrestrial core network, the location mapping system of the terrestrial core network Y1 uses the Server _ID as an index to query the local mapping binding relationship, and obtains the network number of the space core network Y2 corresponding to the Server; The location mapping system of the network Y1 takes the network number of the space core network Y2 as an index to query the local mapping binding relationship, obtains BR _{Y1-Y2_LOC1} and returns to BR _X-Y1 ; (b) if the core network Y1 is a space core network, the space The location mapping system of the core network Y1 uses the Server _ID as an index to query the local mapping binding relationship. If there is no relevant entry for the Server, it needs to query the ground core network Y2 and return BR _{Y1-Y2_LOC1} to BR _X-Y1 ;

步骤10、BR_X-Y1将BR_{Y1-Y2_LOC1}与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y1在报文头部中的目的位置标识处填写BR_{Y1-Y2_LOC1}并向BR_Y1-Y2发送报文；Step 10, BR _X-Y1 binds BR _{Y1-Y2_LOC1} and Server _ID and caches it in the local binding relationship list; BR _X-Y1 fills in BR _{Y1-Y2_LOC1} at the destination location identifier in the message header and sends BR _Y1-Y2 send messages;

步骤11、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_X-Y1，沿途路由器转发报文并按需缓存服务内容，之后执行步骤27；否则路由器将服务内容请求报文继续向BR_Y1-Y2转发；Step 11. After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _X-Y1 , and the router along the route forwards the message and caches the service as needed content, then perform step 27; otherwise, the router will continue to forward the service content request message to BR _Y1-Y2 ;

步骤12、BR_Y1-Y2收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y1-Y2查询本地是否存有A和Server相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤13；否则，BR_Y1-Y2将报文头部中A和Server的位置标识替换为在核心网Y2中对应的位置标识后转发报文至BR_Y2-Z，之后执行步骤16；Step 12. After receiving the message, BR _Y1-Y2 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y1-Y2 inquires whether there is an identity and location identification binding relationship between A and Server locally. If there is no relevant information, go to step 13; otherwise, BR _Y1-Y2 will identify the location of A and Server in the message header Replace it with the corresponding location identifier in the core network Y2 and forward the message to _BRY2-Z , and then perform step 16;

步骤13、BR_Y1-Y2将A_ID与BR_{X-Y1_LOC2}进行绑定后缓存在本地的绑定关系列表中；并将报文头部中的BR_{X-Y1_LOC2}替换BR_{Y1-Y2_LOC2}；BR_Y1-Y2向核心网Y2的位置映射系统询问Server的位置标识；Step 13, BR _Y1-Y2 binds the A _ID and BR _{X-Y1_LOC2} and caches it in the local binding relationship list; and replaces BR _{X-Y1_LOC2} in the message header with BR _{Y1-Y2_LOC2} ; BR _{Y1- Y2} asks the location mapping system of the core network Y2 for the location identifier of the Server;

步骤14、核心网Y2的位置映射系统以Server_ID为索引查询本地映射绑定关系，并得到Server所属接入网Z的网络编号；核心网Y2的位置映射系统再以接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y2-Z_LOC1}并返回给BR_Y1-Y2；Step 14. The location mapping system of the core network Y2 uses the Server _ID as an index to query the local mapping binding relationship, and obtains the network number of the access network Z to which the Server belongs; the location mapping system of the core network Y2 uses the network number of the access network Z Query the local mapping binding relationship for the index, get BR _{Y2-Z_LOC1} and return it to BR _Y1-Y2 ;

步骤15、BR_Y1-Y2将BR_{Y2-Z_LOC1}与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_Y1-Y2在报文头部中的目的位置标识处填写BR_{Y2-Z_LOC1}并向BR_Y2-Z发送报文；Step 15, BR _Y1-Y2 binds BR _{Y2-Z_LOC1} and Server _ID and caches it in the local binding relationship list; BR _Y1-Y2 fills in BR _{Y2-Z_LOC1} at the destination location identifier in the message header and sends BR _Y2-Z sends a message;

步骤16、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_Y1-Y2，沿途路由器转发报文并按需缓存服务内容，之后执行步骤26；否则路由器将服务内容请求报文继续向BR_Y2-Z转发；Step 16: After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _Y1-Y2 , and the router along the route forwards the message and caches the service as needed content, then perform step 26; otherwise, the router will continue to forward the service content request message to BR _Y2-Z ;

步骤17、BR_Y2-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y2-Z查询本地是否存有A和Server相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤18；否则，BR_Y2-Z将报文头部中A和Server的位置标识替换为在接入网Z中对应的位置标识后转发报文至AR_S，之后执行步骤21；Step 17: After receiving the message, BR _Y2-Z needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y2-Z inquires whether there is an identity and location identification binding relationship between A and Server locally. If there is no relevant information, go to step 18; otherwise, BR _Y2-Z will identify the location of A and Server in the message header Replaced by forwarding the message to _ARS after the corresponding location identifier in the access network Z, and then performing step 21;

步骤18、BR_Y2-Z将A_ID与BR_{Y1-Y2_LOC2}进行绑定后缓存在本地的绑定关系列表中，并将报文头部中的BR_{Y1-Y2_LOC2}替换BR_{Y2-Z_LOC2}；BR_Y2-Z向接入网Z的位置映射系统询问B的位置标识；Step 18, BR _Y2-Z binds the A _ID with BR _{Y1-Y2_LOC2} and caches it in the local binding relationship list, and replaces BR _{Y1-Y2_LOC2} in the message header with BR _{Y2-Z_LOC2} ; BR _{Y2- Z} asks the location mapping system of the access network Z for the location identifier of B;

步骤19、接入网Z的位置映射系统以Server_ID为索引查询本地映射绑定关系，得到Server_Z-LOC并返回给BR_Y2-Z；Step 19, the location mapping system of the access network Z uses the Server _ID as an index to query the local mapping binding relationship, obtains the Server _Z-LOC and returns it to BR _Y2-Z ;

步骤20、BR_Y2-Z将Server_Z-LOC与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_Y2-Z在报文头部中的目的位置标识处填写Server_Z-LOC并向Server发送报文；Step 20, BR _Y2-Z binds Server _Z-LOC and Server _ID and caches it in the local binding relationship list; BR _Y2-Z fills in Server _Z-LOC at the destination location identifier in the message header and sends Server sends message;

步骤21、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_Y2-Z，沿途路由器转发报文并按需缓存服务内容，之后执行步骤25；否则路由器将服务内容请求报文继续向Server转发；Step 21. After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _Y2-Z , and the router along the route forwards the message and caches the service as needed content, then perform step 25; otherwise, the router will continue to forward the service content request message to the Server;

步骤22、服务内容请求报文到达AR_S，(假设AR_S没有缓存相关服务内容，否则执行步骤21)，AR_S缓存下A_ID和BR_{Y2-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给Server；Step 22, the service content request message arrives at ARS, (assuming that ARS does not cache relevant service content, otherwise perform step 21), _ARS caches the binding relationship between _{A ID} and BR _{Y2-Z_LOC2 ,} and removes the message header The source and destination location identifiers in the packet are then forwarded to the Server;

步骤23、Server返回服务内容给AR_S，报文头部包含SID、Server_ID以及A_ID；Step 23, Server returns the service content to ARS, and the message header includes SID, Server _ID and _{A ID} ;

步骤24、AR_S在Server所发送报文头部中添加对应的位置标识后将报文发往BR_Y2-Z，沿途路由器转发报文并按需缓存服务内容；Step 24, ARS adds the corresponding location identifier in the header of the message sent by the Server, and then sends the message to _{BRY2 -Z} , and the routers along the way forward the message and cache the service content as needed;

步骤25、BR_Y2-Z将报文发往BR_Y1-Y2，沿途路由器转发报文并按需缓存服务内容；Step 25, BR _Y2-Z sends the message to BR _Y1-Y2 , routers along the way forward the message and cache the service content as needed;

步骤26、BR_Y1-Y2将报文发往BR_X-Y1，沿途路由器转发报文并按需缓存服务内容；Step 26, BR _Y1-Y2 sends the message to BR _X-Y1 , and the routers along the way forward the message and cache the service content as needed;

步骤27、BR_X-Y1将报文发往AR_A，沿途路由器转发报文并按需缓存服务内容；Step 27, BR _{X -Y1} sends the message to ARA, and the routers along the way forward the message and cache the service content as needed;

步骤28、AR_A收到服务内容后，去掉报文头部中的源和目的位置标识后再将报文转发给A。Step 28: After receiving the service content, AR _A removes the source and destination identifiers in the message header and then forwards the message to A.

3.3、用户服务功能请求方法3.3. User service function request method

用户服务功能请求是指用户将待处理的数据交付给提供某些特殊功能的服务器或路由器，后者将数据处理后返回给用户或用户所指定的目的网络实体。The user service function request means that the user delivers the data to be processed to a server or router that provides some special functions, and the latter returns the data to the user or the destination network entity designated by the user after processing.

如图13，不妨设用户为A，其接入路由器为AR_A，其身份标识为A_ID，其在所属网络X的位置标识为A_X-LOC，服务标识为SID；用户所指定的目的网络实体为B，其接入路由器为AR_B，其身份标识为B_ID，位置标识为B_LOC，用户的服务功能请求过程遵循以下步骤：As shown in Figure 13, it may be assumed that the user is A, its access router is AR _A , its identity is A _ID , its location in the network X it belongs to is A _X-LOC , and its service ID is SID; the destination network designated by the user The entity is B, its access router is AR _B , its identity is B _ID , and its location is B _LOC . The user's service function request process follows the steps below:

步骤1、A向所属网络X的资源管理系统发送服务功能查询报文，查询可提供的服务功能；Step 1. A sends a service function query message to the resource management system of the network X to which it belongs, to query the available service functions;

步骤2、AR_A向所属网络X的资源管理系统转发该服务功能查询报文；Step 2, AR _A forwards the service function query message to the resource management system of network X to which it belongs;

步骤3、所属网络X的资源管理系统返回AR_A可提供的服务功能列表；Step 3. The resource management system of the network X to which it belongs returns a list of service functions that AR _A can provide;

步骤4、AR_A将服务功能列表转发给A；Step 4, AR _A forwards the service function list to A;

步骤5、服务功能以SID标识，A选择一系列服务功能，组成有序的服务功能链列表，如[SID₁，SID₂，…,SID_n]，并附上待处理数据后发往所属网络X的资源管理系统；Step 5. The service function is identified by SID. A selects a series of service functions to form an orderly list of service function chains, such as [SID ₁ , SID ₂ , ..., SID _n ], and attaches the data to be processed and sends it to the network to which it belongs X's resource management system;

步骤6、AR_A将A待处理的数据缓存在本地，抽取服务功能链列表转发至资源管理系统；Step 6. AR _A caches the data to be processed by A locally, extracts the service function chain list and forwards it to the resource management system;

步骤7、资源管理系统收到后，将服务功能链映射为能够提供对应服务功能网络实体的位置标识链并返回给AR_A；Step 7. After receiving it, the resource management system maps the service function chain to a location identification chain that can provide the corresponding service function network entity and returns it to _ARA ;

步骤8、如果A在发送服务功能请求时未指明接收处理后数据的网络实体，AR_A默认该数据将返回给A，并在返回的位置标识链末尾添加A_LOC、A_X-ID；否则，A在返回的位置标识链末尾添加B的B_LOC、B_ID。之后，AR_A附上待处理数据后采用源路由的方式向所涉及的网络实体发送服务功能请求，其服务功能请求报文如表6所示。Step 8. If A does not specify the network entity receiving the processed data when A sends the service function request, AR _A defaults that the data will be returned to A, and adds A _LOC and A _X-ID at the end of the returned location identification chain; otherwise, A adds B _LOC and B _ID of B at the end of the returned location identification chain. Afterwards, after attaching the data to be processed, ARA sends _a service function request to the involved network entities by means of source routing, and its service function request message is shown in Table 6.

表6：服务功能请求报文Table 6: Service function request message

SID₁所处网络实体位置标识1The network entity location identifier 1 where SID ₁ is located SID₁ SID ₁ 所处网络实体位置标识2Location identifier of the network entity where it is located 2 SID₂ SID ₂ …… 所处网络实体位置标识nThe location identifier of the network entity n SID_n SID _n A_X-LOC/B_LOC A _X-LOC /B _LOC A_X-ID/B_ID A _X-ID /B _ID DataData

步骤9、所涉及网络实体收到服务功能请求报文后，去掉报文头部中涉及自身的位置标识和SID后对数据进行处理；处理完毕后按照服务请求报文头部的位置标识继续转发，直至数据发送至AR_A或AR_B；Step 9. After receiving the service function request message, the involved network entity removes the location identifier and SID related to itself in the message header and then processes the data; after processing, continue forwarding according to the location identifier of the service request message header , until the data is sent to AR _A or AR _B ;

步骤10、AR_A将处理后的数据返回给A或AR_B将处理后的数据返回给B。Step 10, AR _A returns the processed data to A or AR _B returns the processed data to B.

实施例1：用户注册方法Example 1: User registration method

如图14所示，假设处于地面孤岛接入网X中的用户MN1首次接入网络，MN1需向位置映射系统注册其位置标识。MN1的接入路由器为AR1，身份标识为MN1_ID，在地面孤岛接入网X中的位置标识为MN1_X-LOC；AR1身份标识为AR1_ID，位置标识为AR1_LOC；互联地面孤岛接入网X与空间核心网Y1的边界路由器为BR_X-Y1，其在地面孤岛接入网X的位置标识为BR_{X-Y1_LOC1}，其在空间核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2，其在空间核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在地面核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；地面孤岛接入网X的网络编号为X_Net-ID，空间核心网Y1的网络编号为Y1_Net-ID。As shown in FIG. 14 , assuming that user MN1 in the terrestrial island access network X accesses the network for the first time, MN1 needs to register its location identifier with the location mapping system. MN1's access router is AR1, its identity is MN1 _ID , and its location in the ground island access network X is MN1 _X-LOC ; AR1's identity is AR1 _ID , and its location is AR1 _LOC ; The border router between X and the space core network Y1 is BR _X-Y1 , its location on the ground isolated island access network X is identified as BR _{X-Y1_LOC1} , and its location on the space core network Y1 is identified as BR _{X-Y1_LOC2} ; the interconnected space core The border router between the network Y1 and the ground core network Y2 is BR _Y1-Y2 , its position in the space core network Y1 is marked as BR _{Y1-Y2_LOC1} , and its position in the ground core network Y2 is marked as BR _{Y1-Y2_LOC2} ; ground island access The network number of the network X is X _Net-ID , and the network number of the space core network Y1 is Y1 _Net-ID .

MN1注册过程遵循以下步骤(报文中省略了类型、长度、校验和、保留、源端口号和目的端口号选项)：The MN1 registration process follows the following steps (type, length, checksum, reservation, source port number and destination port number options are omitted in the message):

步骤1、MN1发送接入请求报文至AR1，并携带认证相关信息，用户侧只使用身份标识进行通信；Step 1, MN1 sends an access request message to AR1, and carries authentication related information, and the user side only uses the identity to communicate;

源身份标识source identity 目的身份标识target identity 负载load MN1_ID MN1 _ID AR1_ID AR1 _ID 身份认证相关信息Authentication related information

步骤2、AR1从请求报文中提取出MN1_ID和认证相关信息发往认证服务器验证MN1的身份；Step 2, AR1 extracts the MN1 _ID and authentication related information from the request message and sends it to the authentication server to verify the identity of MN1;

步骤3、认证服务器将MN1的认证结果返回给AR1；Step 3. The authentication server returns the authentication result of MN1 to AR1;

源位置标识source location identifier 目的位置标识Destination ID 负载load 认证服务器位置标识Authentication server location identifier AR1_LOC AR1 _LOC MN1_ID+身份确认结果MN1 _ID + identity confirmation result

步骤4、AR1将认证结果转发给MN1；Step 4, AR1 forwards the authentication result to MN1;

源身份标识source identity 目的身份标识target identity 负载load AR1_ID AR1 _ID MN1_ID MN1 _ID 身份确认结果Identity verification result

步骤5、AR1查看认证服务器返回的认证结果，若合法，则从位置标识池中分配一个位置标识MN1_X-LOC给MN1，并记录下MN1_ID与MN1_X-LOC的绑定关系。之后，AR1代替MN1向地面孤岛接入网X的位置映射系统注册MN1_ID与MN1_X-LOC的绑定关系；Step 5. AR1 checks the authentication result returned by the authentication server. If it is legal, it allocates a location identifier MN1 _X-LOC from the location identifier pool to MN1, and records the binding relationship between MN1 _ID and MN1 _X-LOC . After that, AR1 replaces MN1 and registers the binding relationship between MN1 _ID and MN1 _X-LOC with the location mapping system of ground island access network X;

源位置标识source location identifier 目的位置标识Destination ID 负载load AR1_LOC AR1 _LOC 位置映射系统位置标识Location Mapping System Location Identification MN1_ID+MN1_X-LOC MN1 _ID +MN1 _X-LOC

步骤6、地面孤岛接入网X的位置映射系统收到注册报文后，注册MN1_ID与MN1_X-LOC的绑定关系，并向AR1发送确认信息；Step 6. After receiving the registration message, the location mapping system of the ground isolated island access network X registers the binding relationship between the MN1 _ID and the MN1 _X-LOC , and sends a confirmation message to AR1;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification AR1_LOC AR1 _LOC 确认信息confirm information

步骤7、地面孤岛接入网X的位置映射系统通过BR_X-Y1向空间核心网Y1的位置映射系统注册MN1_ID与X_Net-ID的绑定关系；Step 7. The location mapping system of the ground isolated island access network X registers the binding relationship between MN1 _ID and X _Net-ID to the location mapping system of the space core network Y1 through BR _X-Y1 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{X-Y1_LOC1} BR _{X-Y1_LOC1} MN1_ID+X_Net-ID MN1 _ID +X _Net-ID

步骤8、BR_X-Y1收到注册报文后，返回确认信息至地面孤岛接入网X的位置映射系统；Step 8. After receiving the registration message, BR _X-Y1 returns confirmation information to the location mapping system of ground island access network X;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC1} BR _{X-Y1_LOC1} 位置映射系统位置标识Location Mapping System Location Identification 确认信息confirm information

步骤9、BR_X-Y1向空间核心网Y1的位置映射系统注册MN1_ID与X_Net-ID的绑定关系；Step 9, BR _X-Y1 registers the binding relationship between MN1 _ID and X _Net-ID with the location mapping system of spatial core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 位置映射系统位置标识Location Mapping System Location Identification MN1_ID+X_Net-ID MN1 _ID +X _Net-ID

步骤10、空间核心网Y1的位置映射系统收到注册报文后，注册MN1_ID与X_Net-ID的绑定关系，并向BR_x-Y1发送确认信息。Step 10: After receiving the registration message, the location mapping system of the spatial core network Y1 registers the binding relationship between the MN1 _ID and X _Net-ID , and sends a confirmation message to BR _x-Y1 .

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 确认信息confirm information

步骤11、空间核心网Y1的位置映射系统通过BR_Y1-Y2向地面核心网Y2的位置映射系统注册MN1_ID与Y1_Net-ID的绑定关系；Step 11, the location mapping system of the space core network Y1 registers the binding relationship between the MN1 _ID and the Y1 _Net-ID to the location mapping system of the ground core network Y2 through BR _Y1-Y2 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y1-Y2_LOC1} BR _{Y1-Y2_LOC1} MN1_ID+Y1_Net-ID MN1 _ID +Y1 _Net-ID

步骤12、BR_Y1-Y2收到注册后，返回确认信息至空间核心网Y1的位置映射系统；Step 12. After receiving the registration, BR _Y1-Y2 returns confirmation information to the location mapping system of space core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y1-Y2_LOC1} BR _{Y1-Y2_LOC1} 位置映射系统位置标识Location Mapping System Location Identification 确认信息confirm information

步骤13、BR_Y1-Y2向地面核心网Y2的位置映射系统注册MN1_ID与Y1_Net-ID的绑定关系；Step 13, BR _Y1-Y2 registers the binding relationship between MN1 _ID and Y1 _Net-ID with the location mapping system of ground core network Y2;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} 位置映射系统位置标识Location Mapping System Location Identification MN1_ID+Y1_Net-ID MN1 _ID +Y1 _Net-ID

步骤14、地面核心网Y2的位置映射系统收到注册报文后，注册MN1_ID与Y1_Net-ID的绑定关系，并向BR_Y1-Y2发送确认信息。Step 14: After receiving the registration message, the location mapping system of the terrestrial core network Y2 registers the binding relationship between the MN1 _ID and the Y1 _Net-ID , and sends a confirmation message to the BR _Y1-Y2 .

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} 确认信息confirm information

实施例2：服务器注册方法Embodiment 2: Server registration method

如图15所示，假设处于地面孤岛接入网X中的服务器Server2向服务查询系统发其注册过程。Server2的接入路由器为AR2，身份标识为Server2_ID；AR2身份标识为AR2_ID，位置标识为AR2_LOC；互联地面孤岛接入网X与空间核心网Y1的边界路由器为BR_X-Y1，其在地面孤岛接入网X的位置标识为BR_{X-Y1_LOC1}，其在空间核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2，其在空间核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在地面核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；地面孤岛接入网X的网络编号为X_Net-ID，空间核心网Y1的网络编号为Y1_Net-ID；服务标识为SID，服务描述信息为SDI。As shown in Fig. 15, it is assumed that the server Server2 in the terrestrial isolated island access network X sends its registration process to the service query system. The access router of Server2 is AR2, and its identity is Server2 _ID ; the identity of AR2 is AR2 _ID , and its location is AR2 _LOC ; the border router interconnecting ground island access network X and space core network Y1 is BR _X-Y1 , which is The location identifier of the ground island access network X is BR _{X-Y1_LOC1} , and its location identifier in the space core network Y1 is BR _{X-Y1_LOC2} ; the border router interconnecting the space core network Y1 and the ground core network Y2 is BRY1 _-Y2 , and its The location identification of the space core network Y1 is BR _{Y1-Y2_LOC1} , and its location identification of the ground core network Y2 is BR _{Y1-Y2_LOC2} ; the network number of the ground island access network X is X _Net-ID , and the network number of the space core network Y1 The number is Y1 _Net-ID ; the service identifier is SID, and the service description information is SDI.

Server2服务内容注册过程遵循以下步骤(报文中省略了类型、长度、校验和、保留、源端口号和目的端口号选项)：The server2 service content registration process follows the following steps (type, length, checksum, reservation, source port number and destination port number options are omitted in the message):

步骤1、Server2发送服务内容注册报文至AR2，报文中携带SDI；Step 1. Server2 sends a service content registration message to AR2, and the message carries SDI;

源身份标识source identity 目的身份标识target identity 负载load Server2_ID Server2 _ID AR2_ID AR2 _ID SDISDI

步骤2、AR2从注册报文中提取Server2_ID和SDI后发往地面孤岛接入网X的服务查询系统进行注册；Step 2, AR2 extracts the Server2 _ID and SDI from the registration message and sends it to the service query system of the ground island access network X for registration;

源位置标识source location identifier 目的位置标识Destination ID 负载load AR2_LOC AR2 _LOC 服务查询系统位置标识Service Inquiry System Location Identification Server2_ID+SDIServer2 _ID +SDI

步骤3、地面孤岛接入网X的服务查询系统收到后，根据SDI查询是否已经存在相同的服务内容，是则提取出该服务内容所对应的SID后返回给AR2；否则根据服务内容本身生成一个新的SID，之后，将SID返回给AR2；Step 3. After receiving the service query system of the ground island access network X, query whether the same service content already exists according to the SDI, and if yes, extract the SID corresponding to the service content and return it to AR2; otherwise, generate it according to the service content itself A new SID, after which, return the SID to AR2;

源位置标识source location identifier 目的位置标识Destination ID 负载load 服务查询系统位置标识Service Inquiry System Location Identification AR2_LOC AR2 _LOC Server2_ID+SIDServer2 _ID +SID

步骤4、AR2收到后将SID返回给Server2；Step 4, AR2 returns the SID to Server2 after receiving it;

源身份标识source identity 目的身份标识target identity 负载load AR2_ID AR2 _ID Server2_ID Server2 _ID SIDSID

步骤5、地面孤岛接入网X的服务查询系统缓存下SID、Server2_ID、SDI以及X_Net-ID绑定关系后，通过BR_X-Y1向空间核心网Y1的服务查询系统发起注册请求；Step 5. After the service query system of the terrestrial isolated island access network X caches the binding relationship of SID, Server2 _ID , SDI and X _Net-ID , it initiates a registration request to the service query system of the spatial core network Y1 through BR _X-Y1 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 服务查询系统位置标识Service Inquiry System Location Identification BR_{X-Y1_LOC1} BR _{X-Y1_LOC1} SID+Server2_ID+SDI+X_Net-ID SID+Server2 _ID +SDI+X _Net-ID

步骤6、BR_X-Y1收到服务注册请求后，向地面孤岛接入网X的服务查询系统发送确认信息；Step 6. After receiving the service registration request, BR _X-Y1 sends a confirmation message to the service query system of the terrestrial isolated island access network X;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC1} BR _{X-Y1_LOC1} 服务查询系统位置标识Service Inquiry System Location Identification 确认信息confirm information

步骤7、BR_X-Y1向空间核心网Y1的服务查询系统发起注册请求；Step 7, BR _X-Y1 initiates a registration request to the service query system of the spatial core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 服务查询系统位置标识Service Inquiry System Location Identification SID+Server2_ID+SDI+X_Net-ID SID+Server2 _ID +SDI+X _Net-ID

步骤8、空间核心网Y1的服务查询系统缓存下SID、Server2_ID、SDI以及X_Net-ID绑定关系后向BR_X-Y1发送确认信息；Step 8. After the service query system caches the SID, Server2 _ID , SDI and X _Net-ID binding relationship of the space core network Y1, it sends a confirmation message to BR _X-Y1 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 服务查询系统位置标识Service Inquiry System Location Identification BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 确认信息confirm information

步骤9、空间核心网Y1的服务查询系统通过BR_Y1-Y2向地面核心网Y2的服务查询系统发起注册请求；Step 9, the service query system of the space core network Y1 initiates a registration request to the service query system of the ground core network Y2 through BR _Y1-Y2 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 服务查询系统位置标识Service Inquiry System Location Identification BR_{Y1-Y2_LOC1} BR _{Y1-Y2_LOC1} SID+Server2_ID+SDI+Y1_Net-ID SID+Server2 _ID +SDI+Y1 _Net-ID

步骤10、BR_Y1-Y2收到服务注册请求后，向空间核心网Y1的服务查询系统发送确认信息；Step 10. After receiving the service registration request, BR _Y1-Y2 sends confirmation information to the service query system of the spatial core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y1-Y2_LOC1} BR _{Y1-Y2_LOC1} 服务查询系统位置标识Service Inquiry System Location Identification 确认信息confirm information

步骤11、BR_Y1-Y2向地面核心网Y2的服务查询系统发起注册请求；Step 11, BR _Y1-Y2 initiates a registration request to the service query system of the terrestrial core network Y2;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} 服务查询系统位置标识Service Inquiry System Location Identification SID+Server2_ID+SDI+Y1_Net-ID SID+Server2 _ID +SDI+Y1 _Net-ID

步骤12、地面核心网Y2的服务查询系统缓存下SID、Server2_ID、SDI以及Y1_Net-ID绑定关系后向BR_Y1-Y2发送确认信息。Step 12: The service query system of the terrestrial core network Y2 caches the binding relationship between SID, Server2 _ID , SDI and Y1 _Net-ID , and then sends confirmation information to BR _Y1-Y2 .

源位置标识source location identifier 目的位置标识Destination ID 负载load 服务查询系统位置标识Service Inquiry System Location Identification BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} 确认信息confirm information

实施例3：端到端传输方法Embodiment 3: end-to-end transmission method

如图16所示，假设处于地面孤岛接入网X中的用户MN1与处于地面移动接入网Z的MN3首次通信，边界路由器上并未缓存相关身份、位置绑定关系。MN1的接入路由器为AR1，身份标识为MN1_ID，在地面孤岛接入网X中的位置标识为MN1_X-LOC；AR1身份标识为AR1_ID，位置标识为AR1_LOC；互联地面孤岛接入网X与空间核心网Y1的边界路由器为BR_X-Y1，其在地面孤岛接入网X的位置标识为BR_{X-Y1_LOC1}，其在空间核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2，其在空间核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在地面核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；互联地面核心网Y2与地面移动接入网Z的边界路由器为BR_Y2-Z，其在地面核心网Y2的位置标识为BR_{Y2-Z_LOC1}，其在地面移动接入网X的位置标识为BR_{Y2-Z_LOC2}；MN3的接入路由器为AR3，身份标识为MN3_ID，在地面移动接入网X中的位置标识为MN3_Z-LOC。As shown in Fig. 16, assuming that the user MN1 in the terrestrial island access network X communicates with the user MN3 in the terrestrial mobile access network Z for the first time, the border router does not cache the relevant identity and location binding relationship. MN1's access router is AR1, its identity is MN1 _ID , and its location in the ground island access network X is MN1 _X-LOC ; AR1's identity is AR1 _ID , and its location is AR1 _LOC ; The border router between X and the space core network Y1 is BR _X-Y1 , its location on the ground isolated island access network X is identified as BR _{X-Y1_LOC1} , and its location on the space core network Y1 is identified as BR _{X-Y1_LOC2} ; the interconnected space core The border router between network Y1 and terrestrial core network Y2 is BR _Y1-Y2 , its location in space core network Y1 is identified as BR _{Y1-Y2_LOC1} , and its location in terrestrial core network Y2 is identified as BR _{Y1-Y2_LOC2} ; interconnected terrestrial core network The border router between Y2 and terrestrial mobile access network Z is BR _Y2-Z , its position in the terrestrial core network Y2 is marked as BR _{Y2-Z_LOC1} , and its position in the ground mobile access network X is marked as BR _{Y2-Z_LOC2} ; MN3 The access router is AR3, the ID is MN3 _ID , and the location ID in the terrestrial mobile access network X is MN3 _Z-LOC .

通信遵循以下步骤：(报文中省略了类型、长度、校验和、保留、源端口号和目的端口号选项)The communication follows the following steps: (type, length, checksum, reservation, source port number and destination port number options are omitted in the message)

步骤1、MN1在得知MN3的身份标识后，发送报文到AR1，报文头部的源身份标识为MN1_ID，目的身份标识为MN3_ID，用户侧只使用身份标识通信；Step 1. MN1 sends a message to AR1 after knowing the identity of MN3. The source identity of the message header is MN1 _ID , the destination identity is MN3 _ID , and the user side only uses the identity for communication;

源身份标识source identity 目的身份标识target identity 负载load MN1_ID MN1 _ID MN3_ID MN3 _ID DataData

步骤2、AR1在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为MN1接入时AR1为其分配的MN1_X-LOC。如果AR1没有存储MN3_ID与BR_{X-Y1_LOC1}的绑定关系，则执行步骤3；否则，AR1在报文头部的目的位置标识处填写BR_{X-Y1_LOC1}后向BR_X-Y1发送报文，之后执行步骤6；Step 2. AR1 needs to add a source location identifier and a destination location identifier in the header of the packet on the basis of the original packet. The source location identifier is the MN1 _X-LOC allocated by AR1 when MN1 accesses. If AR1 does not store the binding relationship between MN3 _ID and BR _{X-Y1_LOC1} , go to step 3; otherwise, AR1 fills in BR _{X-Y1_LOC1} in the destination location identifier of the message header and sends the message to BR _X-Y1 , then Execute step 6;

步骤3、AR1向地面孤岛接入网X的位置映射系统询问MN3的MN3_X-LOC；Step 3, AR1 inquires the MN3 _X-LOC of MN3 to the location mapping system of the terrestrial isolated island access network X;

源位置标识source location identifier 目的位置标识Destination ID 负载load AR1_LOC AR1 _LOC 位置映射系统位置标识Location Mapping System Location Identification MN3_ID MN3 _ID

步骤4、地面孤岛接入网X的位置映射系统以MN3_ID为索引查询本地映射绑定关系，发现MN3不处于接入网内，需向空间核心网Y1的位置映射系统查询，并返回给AR1对应的BR_{X-Y1_LOC1}；Step 4. The location mapping system of the terrestrial isolated island access network X uses the MN3 _ID as an index to query the local mapping binding relationship, and finds that MN3 is not in the access network, so it needs to query the location mapping system of the spatial core network Y1 and return it to AR1 Corresponding BR _{X-Y1_LOC1} ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification AR1_LOC AR1 _LOC MN3_ID+BR_{X-Y1_LOC1} MN3 _ID +BR _{X-Y1_LOC1}

步骤5、接入路由器收到后在报文头部中的目的位置标识处填写BR_{X-Y1_LOC1}，并向BR_X-Y1发送报文；Step 5. After receiving it, the access router fills in BR _{X-Y1_LOC1} in the destination location identifier in the message header, and sends the message to BR _X-Y1 ;

步骤6、BR_X-Y1收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y1查询本地是否存有MN1和MN3相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤7；否则，BR_X-Y1将报文头部中通信双方的位置标识替换为在空间核心网Y1中对应的位置标识后转发报文，之后执行步骤10；Step 6. After receiving the message, BR _X-Y1 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _X-Y1 checks whether there is a binding relationship between MN1 and MN3 related identities and location identifiers locally, if there is no relevant information, go to step 7; otherwise, BR _X-Y1 replaces the location identifiers of both parties in the message header To forward the message after identifying the corresponding location in the space core network Y1, and then perform step 10;

步骤7、BR_X-Y1将MN1_ID与MN1_X-LOC进行绑定后缓存在本地的绑定关系列表中并将报文头部中的MN1_X-LOC替换BR_{X-Y1_LOC2}；BR_X-Y1向空间核心网Y1的位置映射系统询问MN3的位置标识；Step 7, BR _X-Y1 binds MN1 _ID and MN1 _X-LOC and caches them in the local binding relationship list and replaces BR _{X-Y1_LOC2} with MN1 _X-LOC in the message header; BR _X-Y1 Query the location identification of MN3 from the location mapping system of the spatial core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 位置映射系统位置标识Location Mapping System Location Identification MN3_ID MN3 _ID

步骤8、空间核心网Y1的位置映射系统以MN3_ID为索引查询本地映射绑定关系，发现MN3不处于空间核心网Y1内，需向地面核心网Y2的位置映射系统查询，空间核心网Y1的位置映射系统返回BR_{Y1-Y2_LOC1}给BR_X-Y1；Step 8. The location mapping system of the space core network Y1 queries the local mapping binding relationship with the MN3 _ID as an index, and finds that MN3 is not in the space core network Y1, so it needs to query the location mapping system of the ground core network Y2. The location mapping system returns BR _{Y1-Y2_LOC1} to BR _X-Y1 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} MN3_ID+BR_{Y1-Y2_LOC1} MN3 _ID +BR _{Y1-Y2_LOC1}

步骤9、BR_X-Y1将BR_{Y1-Y2_LOC1}与MN3_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y1在报文头部中的目的位置标识处填写BR_{Y1-Y2_LOC1}并向BR_Y1-Y2发送报文；Step 9, BR _X-Y1 binds BR _{Y1-Y2_LOC1} and MN3 _ID and caches it in the local binding relationship list; BR _X-Y1 fills in BR _{Y1-Y2_LOC1} at the destination location identifier in the message header and sends BR _Y1-Y2 send messages;

步骤10、BR_Y1-Y2收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y1-Y2查询本地是否存有MN1和MN3相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤11；否则，BR_Y1-Y2将报文头部中通信双方的位置标识替换为在地面核心网Y2中对应的位置标识后转发报文，之后执行步骤14；Step 10, after receiving the message, BR _Y1-Y2 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y1-Y2 inquires whether there is an identity and location identification binding relationship between MN1 and MN3 locally, if there is no relevant information, go to step 11; otherwise, BR _Y1-Y2 replaces the location identifications of both parties in the message header In order to forward the message after the corresponding position identification in the ground core network Y2, then perform step 14;

步骤11、BR_Y1-Y2将MN1_ID与BR_{X-Y1_LOC2}进行绑定后缓存在本地的绑定关系列表中部分将报文头部中的BR_{X-Y1_LOC2}替换BR_{Y1-Y2_LOC2}；BR_Y1-Y2向地面核心网Y2的位置映射系统询问MN3的位置标识；Step 11, BR _Y1-Y2 binds the MN1 _ID with BR _{X-Y1_LOC2} and caches them in the local binding relationship list, partially replaces BR _{X-Y1_LOC2} in the message header with BR _{Y1-Y2_LOC2} ; BR _Y1-Y2 Ask the location mapping system of the terrestrial core network Y2 for the location identifier of MN3;

步骤12、地面核心网Y2的位置映射系统以MN3_ID为索引查询本地映射绑定关系，并得到MN3所属地面移动接入网Z的网络编号；地面核心网Y2的位置映射系统再以地面移动接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y2-Z_LOC1}并返回给BR_Y1-Y2；Step 12. The location mapping system of the terrestrial core network Y2 uses the MN3 _ID as an index to query the local mapping binding relationship, and obtains the network number of the terrestrial mobile access network Z to which MN3 belongs; the location mapping system of the terrestrial core network Y2 uses the terrestrial mobile access The network number of network Z is an index to query the local mapping binding relationship, get BR _{Y2-Z_LOC1} and return it to BR _Y1-Y2 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} MN3_ID+BR_{Y2-Z_LOC1} MN3 _ID +BR _{Y2-Z_LOC1}

步骤13、BR_Y1-Y2将BR_{Y2-Z_LOC1}与MN3_ID进行绑定后缓存在本地绑定关系列表中；BR_Y1-Y2在报文头部中的目的位置标识处填写BR_{Y2-Z_LOC1}并向BR_Y2-Z发送报文；Step 13, BR _Y1-Y2 binds BR _{Y2-Z_LOC1} and MN3 _ID and caches it in the local binding relationship list; BR _Y1-Y2 fills in BR _{Y2-Z_LOC1} at the destination location identifier in the message header and sends BR _Y2-Z sends a message;

步骤14、BR_Y2-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y2-Z查询本地是否存有MN1和MN3相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤15；否则，BR_Y2-Z将报文头部中通信双方的位置标识替换为在地面一接入网Z中对应的位置标识后转发报文，之后执行步骤18；Step 14: After receiving the message, BR _Y2-Z needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y2-Z checks whether there is a binding relationship between MN1 and MN3 related identities and location identifiers locally, if there is no relevant information, go to step 15; otherwise, BR _Y2-Z replaces the location identifiers of both parties in the message header In order to forward the message after the corresponding position identification in the ground-access network Z, then perform step 18;

步骤15、BR_Y2-Z将MN1_ID与BR_{Y1-Y2_LOC2}进行绑定后缓存在本地的绑定关系列表中；之后，BR_Y2-Z将报文头部中的BR_{Y1-Y2_LOC2}替换BR_{Y2-Z_LOC2}；BR_Y2-Z向地面移动接入网Z的位置映射系统询问MN3的位置标识；Step 15, BR _Y2-Z binds MN1 _ID and BR _{Y1-Y2_LOC2} and caches them in the local binding relationship list; after that, BR _Y2-Z replaces BR _{Y1-Y2_LOC2} in the message header with BR _{Y2- Z_LOC2} ; BR _Y2-Z asks the location mapping system of the terrestrial mobile access network Z for the location identification of MN3;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y2-Z_LOC2} BR _{Y2-Z_LOC2} 位置映射系统位置标识Location Mapping System Location Identification MN3_ID MN3 _ID

步骤16、地面移动接入网Z以MN3_ID为索引查询本地映射绑定关系，得到B_Z-LOC并返回给BR_Y2-Z；Step 16, the ground mobile access network Z uses the MN3 _ID as an index to query the local mapping binding relationship, obtains B _Z-LOC and returns it to BR _Y2-Z ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y2-Z_LOC2} BR _{Y2-Z_LOC2} MN3_ID+MN3_Z-LOC MN3 _ID +MN3 _Z-LOC

步骤17、BR_Y2-Z将MN3_Z-LOC与MN3_ID进行绑定后缓存在本地绑定关系列表中；BR_Y2-Z在报文头部中的目的位置标识处填写B_Z-LOC并向B发送报文；Step 17, BR _Y2-Z binds MN3 _Z-LOC and MN3 _ID and caches it in the local binding relationship list; BR _Y2-Z fills in B _Z-LOC at the destination location identifier in the message header and sends it to B sends a message;

步骤18、AR_B收到报文后，缓存下A_ID和BR_{Y2-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给B。Step 18: After AR _B receives the message, it caches the binding relationship between A _ID and _{BRY2-Z_LOC2} , removes the source and destination identifiers in the message header, and then forwards the message to B.

源身份标识source identity 目的身份标识target identity 负载load MN1_ID MN1 _ID MN3_ID MN3 _ID DataData

实施例4：服务内容传输方法Embodiment 4: service content transmission method

如图17所示，假设处于地面孤岛接入网X中的用户MN1请求位于地面移动接入网Z中Server4的服务内容。MN1的接入路由器为AR1，其身份标识为MN1_ID，其在地面孤岛接入网X的位置标识为MN1_X-LOC；互联地面孤岛接入网X与空间核心网Y1的边界路由器为BR_X-Y1，其在地面孤岛接入网X位置标识为BR_{X-Y1_LOC1}，其在空间核心网Y1的位置标识为BR_{X-Y1_LOC2}；互联空间核心网Y1与地面核心网Y2的边界路由器为BR_Y1-Y2，其在空间核心网Y1的位置标识为BR_{Y1-Y2_LOC1}，其在地面核心网Y2的位置标识为BR_{Y1-Y2_LOC2}；互联地面核心网Y2与地面移动接入网Z的边界路由器为BR_Y2-Z，其在空间核心网Y2位置标识为BR_{Y2-Z_LOC1}，其在地面移动接入网Z的位置标识为BR_{Y2-Z_LOC2}；服务器为Server4，其接入路由器为AR4，其身份标识为Server4_ID，其在地面移动接入网Z的位置标识为Server4_Z-LOC，其提供的服务内容的服务标识为SID；沿途路由器为R，其位置标识为R_LOC。As shown in FIG. 17 , it is assumed that the user MN1 in the terrestrial island access network X requests the service content of Server4 in the terrestrial mobile access network Z. The access router of MN1 is AR1, its identity is MN1 _ID , its location on the ground isolated island access network X is marked as MN1 _X-LOC ; the border router interconnecting the ground isolated island access network X and the space core network Y1 is BR _{X -Y1} , its location on the ground isolated island access network X is identified as BR _{X-Y1_LOC1} , and its location on the space core network Y1 is identified as BR _{X-Y1_LOC2} ; the border router interconnecting the space core network Y1 and the ground core network Y2 is BR _{Y1 -Y2} , its location in the space core network Y1 is identified as BR _{Y1-Y2_LOC1} , and its location in the ground core network Y2 is identified as _{BRY1-Y2_LOC2} ; the border router interconnecting the ground core network Y2 and the ground mobile access network Z is BR _Y2-Z , whose location in the space core network Y2 is identified as BR _{Y2-Z_LOC1} , and whose location in the ground mobile access network Z is identified as BR _{Y2-Z_LOC2} ; the server is Server4, its access router is AR4, and its identity is Server4 _ID , its location identifier in the ground mobile access network Z is Server4 _Z-LOC , the service identifier of the service content it provides is SID; the router along the way is R, and its location identifier is R _LOC .

用户的服务传输过程遵循以下步骤(报文中省略了类型、长度、校验和、保留、源端口号和目的端口号选项)：The user's service transmission process follows the following steps (type, length, checksum, reservation, source port number and destination port number options are omitted in the message):

步骤1、MN1发送服务内容请求报文至AR1，报文头部包含SID、MN1_ID以及Server4_ID；Step 1, MN1 sends a service content request message to AR1, and the message header includes SID, MN1 _ID and Server4 _ID ;

服务标识Service ID 源身份标识source identity 目的身份标识target identity SIDSID MN1_ID MN1 _ID Server4_ID Server4 _ID

步骤2、AR1在原有报文的基础上需要在报文头部添加源位置标识和目的位置标识。源位置标识即为MN1接入时AR1为其分配的MN1_X-LOC。如果AR_A没有存储Server4_ID与Server4_X-LOC的绑定关系，则执行步骤3；否则，AR1在报文头部的目的位置标识处填写Server4_X-LOC后向Server4发送报文，之后执行步骤6；Step 2. AR1 needs to add a source location identifier and a destination location identifier in the header of the packet on the basis of the original packet. The source location identifier is the MN1 _X-LOC allocated by AR1 when MN1 accesses. If AR _A does not store the binding relationship between Server4 _ID and Server4 _X-LOC , perform step 3; otherwise, AR1 fills in the destination location identifier of the message header with Server4 _X-LOC and sends the message to Server4, and then performs the steps 6;

步骤3、AR1向地面孤岛接入网X的位置映射系统查询Server4_ID所对应的Server4_X-LOC；Step 3, AR1 queries the corresponding Server4 _X-LOC of the Server4 _ID to the location mapping system of the ground isolated island access network X;

步骤4、地面孤岛接入网X的位置映射系统查询本地绑定关系，发现Server4不处于接入网，须向空间核心网Y1的位置映射系统查询，返回AR1BR_{X-Y1_LOC1}；Step 4, the location mapping system of the ground isolated island access network X queries the local binding relationship, finds that Server4 is not in the access network, must query the location mapping system of the space core network Y1, and returns AR1BR _{X-Y1_LOC1} ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification AR1_LOC AR1 _LOC Server4_ID+BR_{X-Y1_LOC1} Server4 _ID +BR _{X-Y1_LOC1}

步骤5、AR1在MN1所发送报文头部中添加对应的位置标识后将报文发往BR_X-Y1；Step 5, AR1 sends the message to BR _X-Y1 after adding the corresponding location identifier in the message header sent by MN1;

步骤6、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给AR1，沿途路由器转发报文并按需缓存服务内容，之后执行步骤28；否则路由器将服务内容请求报文继续向BR_X-Y1转发；Step 6. After receiving the request message, routers along the route query the local SID cache list with the SID as an index. If relevant service content exists, the router returns the service content to AR1, and routers along the route forward the message and cache the service content as needed. After that, Execute step 28; otherwise, the router continues to forward the service content request message to BR _X-Y1 ;

步骤7、服务内容请求报文到达BR_X-Y1后，需要改写报文头部的源位置标识和目的位置标识。BR_X-Y1查询本地是否存有MN1和Server4相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤8；否则，BR_X-Y1将报文头部中MN1和Server4的位置标识替换为在空间核心网Y1中对应的位置标识后转发报文，之后执行步骤11；Step 7: After the service content request message arrives at BR _X-Y1 , it is necessary to rewrite the source location identifier and destination location identifier of the message header. BR _{X -Y1} inquires whether there is an identity and location identification binding relationship between MN1 and Server4 locally. If there is no relevant information, go to step 8; Replace it with forwarding the message after the corresponding location identifier in the space core network Y1, and then perform step 11;

步骤8、BR_X-Y1将MN1_ID与MN1_X-LOC进行绑定后缓存在本地的绑定关系列表中并将报文头部中的MN1_X-LOC替换BR_{X-Y1_LOC2}；BR_X-Y1向空间核心网Y1的位置映射系统询问Server4的位置标识；Step 8, BR _X-Y1 binds MN1 _ID and MN1 _X-LOC and caches them in the local binding relationship list and replaces BR _{X-Y1_LOC2} with MN1 _X-LOC in the message header; BR _X-Y1 Query the location identification of Server4 from the location mapping system of the spatial core network Y1;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} 位置映射系统位置标识Location Mapping System Location Identification Server4_ID Server4 _ID

步骤9、空间核心网Y1的位置映射系统以Server4_ID为索引查询本地映射绑定关系，发现没有Server4的相关条目，则需向地面核心网Y2查询，将BR_{Y1-Y2_LOC1}返回给BR_X-Y1；Step 9. The location mapping system of the spatial core network Y1 uses the Server4 _ID as an index to query the local mapping binding relationship. If there is no relevant entry for Server4, it needs to query the ground core network Y2 and return BR _{Y1-Y2_LOC1} to BR _X-Y1 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{X-Y1_LOC2} BR _{X-Y1_LOC2} Server4_ID+BR_{Y1-Y2_LOC1} Server4 _ID +BR _{Y1-Y2_LOC1}

步骤10、BR_X-Y1将BR_{Y1-Y2_LOC1}与Server4_ID进行绑定后缓存在本地绑定关系列表中；BR_X-Y1在报文头部中的目的位置标识处填写BR_{Y1-Y2_LOC1}并向BR_Y1-Y2发送报文；Step 10, BR _X-Y1 binds BR _{Y1-Y2_LOC1} and Server4 _ID and caches it in the local binding relationship list; BR _X-Y1 fills in BR _{Y1-Y2_LOC1} at the destination location identifier in the message header and sends BR _Y1-Y2 send messages;

步骤11、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_X-Y1，沿途路由器转发报文并按需缓存服务内容，之后执行步骤27；否则路由器将服务内容请求报文继续向BR_Y1-Y2转发；Step 11. After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _X-Y1 , and the router along the route forwards the message and caches the service as needed content, then perform step 27; otherwise, the router will continue to forward the service content request message to BR _Y1-Y2 ;

步骤12、BR_Y1-Y2收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y1-Y2查询本地是否存有MN1和Server4相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤13；否则，BR_Y1-Y2将报文头部中MN1和Server4的位置标识替换为在地面核心网Y2中对应的位置标识后转发报文，之后执行步骤16；Step 12. After receiving the message, BR _Y1-Y2 needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y1-Y2 inquires whether there is an identity and location identification binding relationship between MN1 and Server4 locally, if there is no relevant information, then perform step 13; otherwise, BR _Y1-Y2 will identify the location of MN1 and Server4 in the message header Replace it with forwarding the message after the corresponding location identifier in the ground core network Y2, and then perform step 16;

步骤13、BR_Y1-Y2将MN1_ID与BR_{X-Y1_LOC2}进行绑定后缓存在本地的绑定关系列表中，并将报文头部中的BR_{X-Y1_LOC2}替换BR_{Y1-Y2_LOC2}；BR_Y1-Y2向核心网Y2的位置映射系统询问Server4的位置标识；Step 13, BR _Y1-Y2 binds MN1 _ID and BR _{X-Y1_LOC2} and caches them in the local binding relationship list, and replaces BR _{X-Y1_LOC2} in the message header with BR _{Y1-Y2_LOC2} ; BR _{Y1- Y2} asks the location mapping system of the core network Y2 for the location identifier of Server4;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} 位置映射系统位置标识Location Mapping System Location Identification Server4_ID Server4 _ID

步骤14、核心网Y2的位置映射系统以Server4_ID为索引查询本地映射绑定关系，并得到Server4所属地面移动接入网Z的网络编号；地面核心网Y2的位置映射系统再以地面移动接入网Z的网络编号为索引查询本地映射绑定关系，得到BR_{Y2-Z_LOC1}并返回给BR_Y1-Y2；Step 14. The location mapping system of the core network Y2 uses the Server4 _ID as an index to query the local mapping binding relationship, and obtains the network number of the ground mobile access network Z to which Server4 belongs; the location mapping system of the ground core network Y2 uses the ground mobile access The network number of network Z is an index to query the local mapping binding relationship, get BR _{Y2-Z_LOC1} and return it to BR _Y1-Y2 ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y1-Y2_LOC2} BR _{Y1-Y2_LOC2} Server4_ID+BR_{Y2-Z_LOC1} Server4 _ID +BR _{Y2-Z_LOC1}

步骤15、BR_Y1-Y2将BR_{Y2-Z_LOC1}与Server4_ID进行绑定后缓存在本地绑定关系列表中；BR_Y1-Y2在报文头部中的目的位置标识处填写BR_{Y2-Z_LOC1}并向BR_Y2-Z发送报文；Step 15, BR _Y1-Y2 binds BR _{Y2-Z_LOC1} and Server4 _ID and caches it in the local binding relationship list; BR _Y1-Y2 fills in BR _{Y2-Z_LOC1} at the destination location identifier in the message header and sends BR _Y2-Z sends a message;

步骤16、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_Y1-Y2，沿途路由器转发报文并按需缓存服务内容，之后执行步骤26；否则路由器将服务内容请求报文继续向BR_Y2-Z转发；Step 16: After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _Y1-Y2 , and the router along the route forwards the message and caches the service as needed content, then perform step 26; otherwise, the router will continue to forward the service content request message to BR _Y2-Z ;

步骤17、BR_Y2-Z收到报文后，需要改写报文头部的源位置标识和目的位置标识。BR_Y2-Z查询本地是否存有MN1和Server4相关的身份、位置标识绑定关系，如果没有相关信息，则执行步骤18；否则，BR_Y2-Z将报文头部中MN1和Server4的位置标识替换为在地面移动接入网Z中对应的位置标识后转发报文，之后执行步骤21；Step 17: After receiving the message, BR _Y2-Z needs to rewrite the source location identifier and destination location identifier in the header of the message. BR _Y2-Z inquires whether there is an identity and location identification binding relationship between MN1 and Server4 locally, if there is no relevant information, then perform step 18; otherwise, BR _Y2-Z will identify the location of MN1 and Server4 in the message header Replace it with forwarding the message after the corresponding location identifier in the ground mobile access network Z, and then perform step 21;

步骤17、BR_Y2-Z将MN1_ID与BR_{Y1-Y2_LOC2}进行绑定后缓存在本地的绑定关系列表中；之后，BR_Y2-Z将报文头部中的BR_{Y1-Y2_LOC2}替换BR_{Y2-Z_LOC2}；BR_Y2-Z向地面移动接入网Z的位置映射系统询问Server4的位置标识；Step 17, BR _Y2-Z binds the MN1 _ID to BR _{Y1-Y2_LOC2} and caches it in the local binding relationship list; after that, BR _Y2-Z replaces BR _{Y1-Y2_LOC2} in the message header with BR _{Y2- Z_LOC2} ; BR _Y2-Z asks the location mapping system of the terrestrial mobile access network Z for the location identification of Server4;

源位置标识source location identifier 目的位置标识Destination ID 负载load BR_{Y2-Z_LOC2} BR _{Y2-Z_LOC2} 位置映射系统位置标识Location Mapping System Location Identification Server4_ID Server4 _ID

步骤19、地面移动接入网Z的位置映射系统以Server4_ID为索引查询本地映射绑定关系，得到Server4_Z-LOC并返回给BR_Y2-Z；Step 19, the location mapping system of the ground mobile access network Z uses the Server4 _ID as an index to query the local mapping binding relationship, obtains the Server4 _Z-LOC and returns it to BR _Y2-Z ;

源位置标识source location identifier 目的位置标识Destination ID 负载load 位置映射系统位置标识Location Mapping System Location Identification BR_{Y2-Z_LOC2} BR _{Y2-Z_LOC2} Server4_ID+Server4_Z-LOC Server4 _ID +Server4 _Z-LOC

步骤20、BR_Y2-Z将Server4_Z-LOC与Server_ID进行绑定后缓存在本地绑定关系列表中；BR_Y2-Z在报文头部中的目的位置标识处填写Server4_Z-LOC并向Server4发送报文；Step 20, BR _Y2-Z binds Server4 _Z-LOC and Server _ID and caches it in the local binding relationship list; BR _Y2-Z fills in Server4 _Z-LOC at the destination location identifier in the message header and sends Server4 sends message;

步骤21、沿途路由器收到请求报文后，以SID为索引查询本地SID缓存列表，如果存有相关服务内容，路由器将服务内容返回给BR_Y2-Z，沿途路由器转发报文并按需缓存服务内容，之后执行步骤25；否则路由器将服务内容请求报文继续向Server4转发；Step 21. After receiving the request message, the router along the route queries the local SID cache list with the SID as the index. If there is relevant service content, the router returns the service content to BR _Y2-Z , and the router along the route forwards the message and caches the service as needed content, then perform step 25; otherwise, the router continues to forward the service content request message to Server4;

步骤22、服务内容请求报文到达AR4，(假设AR4没有缓存相关服务内容，否则执行步骤21)，AR4缓存下MN1_ID和BR_{Y2-Z_LOC2}的绑定关系，并去掉报文头部中的源和目的位置标识后再将报文转发给Server4；Step 22, the service content request message arrives at AR4, (assuming that AR4 does not cache the relevant service content, otherwise perform step 21), AR4 caches the binding relationship between MN1 _ID and BR _{Y2-Z_LOC2} , and removes the source in the message header and the destination location identifier, and then forward the message to Server4;

服务标识Service ID 源身份标识source identity 目的身份标识target identity SIDSID MN1_ID MN1 _ID Server4_ID Server4 _ID

步骤23、Server4返回服务内容给AR4，报文头部包含SID、Server_ID以及A_ID；Step 23, Server4 returns the service content to AR4, and the message header includes SID, Server _ID and A _ID ;

服务标识Service ID 源身份标识source identity 目的身份标识target identity 负载load SIDSID Server4_ID Server4 _ID MN1_ID MN1 _ID DataData

步骤24、AR4在Server4所发送报文头部中添加对应的位置标识后将报文发往BR_Y2-Z，沿途路由器转发报文并按需缓存服务内容；Step 24, AR4 adds the corresponding location identifier in the header of the message sent by Server4 and then sends the message to _BRY2-Z , routers along the way forward the message and cache the service content as needed;

步骤25、BR_Y2-Z将报文发往BR_Y1-Y2，沿途路由器转发报文并按需缓存服务内容；Step 25, BR _Y2-Z sends the message to BR _Y1-Y2 , routers along the way forward the message and cache the service content as needed;

步骤26、BR_Y1-Y2将报文发往BR_X-Y1，沿途路由器转发报文并按需缓存服务内容；Step 26, BR _Y1-Y2 sends the message to BR _X-Y1 , and the routers along the way forward the message and cache the service content as needed;

步骤27、BR_X-Y1将报文发往AR1，沿途路由器转发报文并按需缓存服务内容；Step 27, BR _X-Y1 sends the message to AR1, and the routers along the way forward the message and cache the service content as needed;

步骤28、AR1收到服务内容后，去掉报文头部中的源和目的位置标识后再将报文转发给MN1。Step 28: After receiving the service content, AR1 removes the source and destination identifiers in the message header and then forwards the message to MN1.

服务标识Service ID 源身份标识source identity 目的身份标识target identity 负载load SIDSID Server4_ID Server4 _ID MN1_ID MN1 _ID DataData

实施例5：服务功能请求模式Example 5: Service function request mode

如图18所示，假设处于网络X中的用户MN1进行服务功能请求，并且数据处理后返回给MN1。MN1的接入路由器为AR1，其身份标识为MN1_ID，其在网络X的位置标识为MN1_X-LOC；用户选择的服务功能为SID₁、SID₂，对应可提供服务功能SID₁、SID₂的网络实体的位置标识为LOC₁和LOC₂。As shown in FIG. 18 , it is assumed that the user MN1 in the network X requests a service function, and returns the data to MN1 after processing. MN1's access router is AR1, its identity is MN1 _ID , and its location in network X is MN1 _X-LOC ; the service functions selected by the user are SID ₁ and SID ₂ , and the corresponding service functions SID ₁ and SID ₂ can be provided The locations of network entities are identified as LOC ₁ and LOC ₂ .

MN1的服务功能请求遵循以下步骤(报文中省略了类型、长度、校验和、保留、源端口号和目的端口号选项)：The service function request of MN1 follows the following steps (type, length, checksum, reservation, source port number and destination port number options are omitted in the message):

步骤1、MN1向网络X的资源管理系统发送服务功能查询报文，查询可提供的服务功能；Step 1. MN1 sends a service function query message to the resource management system of network X to query available service functions;

源身份标识source identity 目的身份标识target identity 负载load MN1_ID MN1 _ID AR1_ID AR1 _ID 空null

步骤2、AR1向网络X的资源管理系统转发该服务功能查询报文；Step 2, AR1 forwards the service function query message to the resource management system of network X;

源位置标识source location identifier 目的位置标识Destination ID 负载load AR1_LOC AR1 _LOC 资源管理系统位置标识Resource management system location identifier MN1_ID MN1 _ID

步骤3、网络X的资源管理系统返回AR1可提供的服务功能列表；Step 3. The resource management system of network X returns a list of service functions that AR1 can provide;

步骤4、AR1转发给MN1；Step 4, AR1 forwards to MN1;

源身份标识source identity 目的身份标识target identity 负载load AR1_ID AR1 _ID MN1_ID MN1 _ID 可提供的服务功能列表List of available service functions

步骤5、服务功能以SID标识，MN1选择一系列服务功能，组成有序的服务功能链列表，如[SID₁，SID₂]，并附上待处理数据后发往网络X的资源管理系统；Step 5, the service function is identified by SID, MN1 selects a series of service functions to form an orderly list of service function chains, such as [SID ₁ , SID ₂ ], and sends the data to be processed to the resource management system of network X;

源身份标识source identity 目的身份标识target identity 负载33 -->load 33 --> MN1_ID MN1 _ID AR1_ID AR1 _ID [SID₁，SID₂]+Data[SID ₁ , SID ₂ ]+Data

步骤6、AR1将MN1待处理的数据缓存在本地，抽取服务功能链列表转发至资源管理系统；Step 6. AR1 caches the data to be processed by MN1 locally, extracts the service function chain list and forwards it to the resource management system;

步骤7、资源管理系统收到后，将服务功能链映射为能够提供对应服务功能网络实体的位置标识链并返回给AR1；Step 7. After receiving it, the resource management system maps the service function chain to the location identification chain of the network entity that can provide the corresponding service function and returns it to AR1;

步骤8、AR1在返回的位置标识链末尾添加MN1_LOC、MN1_X-ID，以及待处理数据后采用源路由的方式向所涉及的网络实体发送服务功能请求。Step 8: AR1 adds MN1 _LOC , MN1 _X-ID , and data to be processed at the end of the returned location identification chain, and sends a service function request to the involved network entity in a source routing manner.

LOC₁ LOC ₁ SID₁ SID ₁ LOC₂ LOC ₂ SID₂ SID ₂ MN1_X-LOC MN1 _X-LOC MN1_X-ID MN1 _X-ID DataData

步骤9、所涉及网络实体收到服务功能请求报文后，去掉报文头部中涉及自身的位置标识和SID后对数据进行处理；处理完毕后按照服务请求报文头部的位置标识继续转发直至AR1。Step 9. After receiving the service function request message, the involved network entity removes the location identifier and SID related to itself in the message header and then processes the data; after processing, continue forwarding according to the location identifier of the service request message header up to AR1.

提供SID₁服务功能的网络实体处理完数据所发送的服务功能请求报文：The service function request message sent by the network entity providing the SID ₁ service function after processing the data:

LOC₂ LOC ₂ SID₂ SID ₂ MN1_X-LOC MN1 _X-LOC MN1_X-ID MN1 _X-ID DataData

提供SID₂服务功能的网络实体处理完数据所发送的服务功能请求报文：The service function request message sent by the network entity providing the SID ₂ service function after processing the data:

MN1_X-LOC MN1 _X-LOC MN1_X-ID MN1 _X-ID DataData

步骤10、AR1将处理后的数据返回MN1。Step 10, AR1 returns the processed data to MN1.

以上参照本发明的实施例对本发明予以了说明。但是，这些实施例仅是为了说明目的，并非为了限制本发明的范围。本发明的范围由所附权利要求及其等价物限定。不脱离本发明的范围，本领域技术人员可以做出多种替换和修改，其都应落在本发明的范围之内。The present invention has been described above with reference to the embodiments of the present invention. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and their equivalents. Those skilled in the art can make various substitutions and modifications without departing from the scope of the present invention, and all of them should fall within the scope of the present invention.