CN105722016A - Cooperative control method for transmitting power of gateway and terminals in hierarchical M2M network - Google Patents

A kind of cooperative control method being layered gateway and terminal transmission power in M2M network is suitable for wireless communication field and uses. Wireless communication link is established using full duplex relaying transmission, obtains the channel state parameter of wireless M2M gateway With , obtain the channel state parameter of wireless M2M terminal With The channel gain in network is calculated afterwards, in the case where meeting the data throughout of each wireless M2M terminal, transmission power control parameter is calculated, to realize the cooperative control method of gateway and terminal transmission power. Terminal is effectively improved to gateway link and gateway to the signal power of base station link and interference noise power ratio i.e. Signal to Interference plus Noise Ratio, to minimize the energy consumption of M2M terminal, meet the minimal time delay requirement of M2M communication, and effectively improve the frequency spectrum resource utilization rate of cellular network.

分层M2M网络中网关和终端发射功率的协同控制方法Cooperative control method of gateway and terminal transmit power in hierarchical M2M network

技术领域technical field

本发明涉及一种协同控制方法，尤其涉及一种机器对机器(Machine-to-Machine，M2M)无线通信领域使用的分层M2M网络中网关和终端发射功率的协同控制方法。The present invention relates to a cooperative control method, in particular to a cooperative control method of gateway and terminal transmit power in a layered M2M network used in the field of Machine-to-Machine (M2M) wireless communication.

背景技术Background technique

随着移动通信网络在全球的广泛部署，无线数据业务已经从传统的人对人(H2H,HumantoHuman)通信向M2M通信领域扩展。M2M通信的原型为无线传感器网络(WSN,WirelessSenorNetwork)，是指在无人工干预的情况下，多个网络设备或终端之间进行自主的信息交互。M2M通信主要面向环境实时监测和控制数据的传输，其应用领域涵盖了工业自动化以及智能城市电网、医疗和应急防护等多个领域，它是物联网(IoT,InternetofThings)的重要组成部分。为了应对M2M数据业务的快速增长，移动通信标准化组织3GPP已经开始关注蜂窝移动网络架构下的M2M通信问题及其标准化工作。然而，现有的蜂窝移动通信标准(如LTE以及LTE-A)均针对传统的H2H通信设计，M2M通信与H2H通信相比具有极大的差异，主要包括：With the widespread deployment of mobile communication networks around the world, wireless data services have expanded from traditional human-to-human (H2H, Human to Human) communication to M2M communication. The prototype of M2M communication is a wireless sensor network (WSN, WirelessSenorNetwork), which refers to autonomous information exchange between multiple network devices or terminals without human intervention. M2M communication is mainly oriented to the transmission of real-time environmental monitoring and control data. Its application fields cover industrial automation, smart city power grid, medical treatment and emergency protection. It is an important part of the Internet of Things (IoT, Internet of Things). In order to cope with the rapid growth of M2M data services, the mobile communication standardization organization 3GPP has begun to pay attention to the M2M communication issues and standardization work under the cellular mobile network architecture. However, the existing cellular mobile communication standards (such as LTE and LTE-A) are all designed for traditional H2H communication. Compared with H2H communication, M2M communication has great differences, mainly including:

1)H2H通信主要传输语音图像、视频等多媒体数据，传输数据量较大(几十MB至几GB不等)。M2M通信则主要传输环境监测和控制数据，数据传输量相对较小(几十KB到几MB不等)；不过M2M终端的数量庞大，环境监测所要求的通信发起频次高(导致通信链路拆建的频率高)，而控制数据的传输对时间延迟也有较高的要求；1) H2H communication mainly transmits audio, image, video and other multimedia data, and the amount of transmitted data is relatively large (ranging from dozens of MB to several GB). M2M communication mainly transmits environmental monitoring and control data, and the data transmission volume is relatively small (ranging from dozens of KB to several MB); however, the number of M2M terminals is huge, and the communication initiation frequency required for environmental monitoring is high (resulting in communication link teardowns). The built-in frequency is high), and the transmission of control data also has high requirements for time delay;

2)H2H通信主要依靠蜂窝下行链路(从基站至用户终端)传输数据，如用户终端下载音乐、浏览网页和视频等。M2M通信主要用于环境实时监测，因此主要依赖蜂窝上行链路(从M2M终端至基站)传输数据。当大量M2M终端同时向基站发出上行链路传输请求时，势必会引发网络拥塞；此外，由于单个M2M通信链路的数据传输量较小，建立大量的M2M终端至基站的上行通信链路无疑会增加链路控制和管理信息的传输开销，导致网络通信资源无法得到有效利用；2) H2H communication mainly relies on cellular downlink (from base station to user terminal) to transmit data, such as user terminal downloading music, browsing web pages and videos, etc. M2M communication is mainly used for real-time monitoring of the environment, so it mainly relies on the cellular uplink (from the M2M terminal to the base station) to transmit data. When a large number of M2M terminals send uplink transmission requests to the base station at the same time, it will inevitably cause network congestion; in addition, due to the small amount of data transmission of a single M2M communication link, establishing a large number of uplink communication links from M2M terminals to the base station will undoubtedly cause Increase the transmission overhead of link control and management information, resulting in ineffective use of network communication resources;

3)H2H终端虽然有能耗大、电池续航能力差等缺点，但其电池可以很方便的充电和替换。而M2M终端通常被放置在环境危险或人类不易接近的区域(如野外山体、煤矿井下等)，辅助环境监测和灾害预警等工作，很少被移动，并且要求在无人干预的情况下工作。因此，针对M2M终端和通信的能耗节省尤为重要。3) Although the H2H terminal has disadvantages such as high energy consumption and poor battery life, its battery can be easily charged and replaced. M2M terminals are usually placed in areas with dangerous environments or inaccessible areas (such as wild mountains, coal mines, etc.), to assist in environmental monitoring and disaster early warning, and are rarely moved, and require no one to intervene. Therefore, energy saving for M2M terminals and communication is particularly important.

为了应对M2M通信所带来的上述挑战，近年来一种新的网络设备，即“M2M网关”被引入到蜂窝网络中。地理位置相邻近的一组M2M终端形成一个“M2M群组”并由同一个M2M网关进行管理，M2M网关是网络基础设施的一部分，它通过无线信道和基站连接，同时，它可以收集并缓存多个M2M终端产生的数据，并将这些数据集中转发至基站。M2M网关的出现使现有蜂窝网络变为一种分层的网络架构，即M2M终端至基站的上行链路被分为两部分，包括“终端至网关链路”以及“网关至基站链路”，其中，网关至基站链路采用LTE/LTE-A标准，而终端至网关链路可以采用LTE/LTE-A标准，或者采用其他无线网络协议，如Wi-Fi和Bluetooth等。In order to cope with the above-mentioned challenges brought by M2M communication, a new type of network equipment, namely "M2M gateway", has been introduced into the cellular network in recent years. A group of M2M terminals geographically adjacent form an "M2M group" and are managed by the same M2M gateway. The M2M gateway is a part of the network infrastructure. It is connected to the base station through a wireless channel. At the same time, it can collect and cache The data generated by multiple M2M terminals is forwarded to the base station in a centralized manner. The emergence of the M2M gateway makes the existing cellular network into a layered network architecture, that is, the uplink from the M2M terminal to the base station is divided into two parts, including "terminal to gateway link" and "gateway to base station link". , wherein the link from the gateway to the base station adopts the LTE/LTE-A standard, and the link from the terminal to the gateway can adopt the LTE/LTE-A standard, or other wireless network protocols such as Wi-Fi and Bluetooth.

在上述分层的M2M网络中，需要解决M2M群组内网关以及多个终端的频谱资源分配问题，现有的文献多采用正交频谱复用的方法解决这一问题，例如：In the above-mentioned layered M2M network, it is necessary to solve the problem of spectrum resource allocation of gateways and multiple terminals in the M2M group. The existing literature mostly uses the method of orthogonal spectrum multiplexing to solve this problem, for example:

文献1：C.Y.HoandC.-Y.Huang,“Energy-savingmassiveaccesscontrolandresourceallocationschemesforM2McommunicationsinOFDMAcellularnetworks,”IEEECommun.Lett.,vol.1,no.3,pp.209–211,2012.Document 1: C.Y.Ho and C.-Y.Huang, "Energy-saving massive access control and resource allocation schemes for M2M communications in OFDMA cellular networks," IEEECommun.Lett., vol.1, no.3, pp.209–211, 2012.

文献2：C.Zhang,G.Ge,J.LiandY.Hu,“Performanceanalysisformobile-relay-basedM2Mtwo-wayAFrelayinginNNakagami-mfading,”IETElectronicsLetters,vol.49,no.5,pp.344-346,Feb.2013.Document 2: C. Zhang, G. Ge, J. Liand Y. Hu, "Performance analysis for mobile-relay-based M2M two-way A Relaying in NNakagami-mfading," IET Electronics Letters, vol.49, no.5, pp.344-346, Feb.2013.

文献3：F.Gong,J.Ge,N.Zhang,“SERanalysisofthemobile-relay-basedM2McommunicationoverdoubleNakagami-mfadingchannels,”IEEECommun.Lett.,vol.15,no.1,pp.34-36,Jan.2011.Document 3: F. Gong, J. Ge, N. Zhang, "SER analysis of the mobile-relay-based M2M communication over double Nakagami-mfading channels," IEEECommun.Lett., vol.15, no.1, pp.34-36, Jan.2011.

文献4：张国鹏，李奥，杜耀，周凯，林育德，靳文斌，嵌入M2M的蜂窝网络中高能效的功率和时隙分配方法，申请号201510624229，申请日2015.9.25，发明专利申请；Document 4: Zhang Guopeng, Li Ao, Du Yao, Zhou Kai, Lin Yude, Jin Wenbin, Energy-efficient power and time slot allocation method in embedded M2M cellular network, application number 201510624229, application date 2015.9.25, invention patent application;

在上述文献1至文献4中，终端至网关链路以及网关至基站链路被分配了不同(即正交)的频谱资源，其中，文献1和2采用了频分复用的方法，而文献3和4则采用了时分复用的方法。正交频谱复用的方法虽然不会引发终端至网关链路以及网关至基站链路的共信道传输干扰，但是会大大降低网络频谱资源的利用率。众所周知，频谱资源匮乏是下一代蜂窝移动网络面临的主要系统瓶颈之一。此外，文献4将普通的H2H用户终端作为M2M通信的中继节点，仅适用于家庭或办公室等小规模M2M通信环境(M2M群组中的终端数＜10)，由于H2H用户终端的计算性能远不及专用的M2M网关，因此无法应对大规模M2M通信(M2M群组中的终端数)的需求。In the above documents 1 to 4, different (that is, orthogonal) spectrum resources are assigned to the link from the terminal to the gateway and the link from the gateway to the base station. Among them, documents 1 and 2 adopt the method of frequency division multiplexing, while documents 3 and 4 adopt the method of time division multiplexing. Although the orthogonal spectrum multiplexing method will not cause co-channel transmission interference on the link from the terminal to the gateway and the link from the gateway to the base station, it will greatly reduce the utilization rate of network spectrum resources. As we all know, the scarcity of spectrum resources is one of the main system bottlenecks faced by the next generation cellular mobile network. In addition, Document 4 uses ordinary H2H user terminals as M2M communication relay nodes, which is only suitable for small-scale M2M communication environments such as homes or offices (the number of terminals in an M2M group is <10). It is not as good as a dedicated M2M gateway, so it cannot meet the needs of large-scale M2M communication (the number of terminals in an M2M group).

发明内容Contents of the invention

针对上述技术的不足之处，提供一种允许M2M群组内的终端至网关链路以及网关至基站链路在同一频段上并发传输数据，并针对M2M群组内终端和网关的发射功率协同控制非正交频谱复用的分层M2M网络中网关和终端发射功率的协同控制方法。Aiming at the deficiencies of the above technologies, a method is provided that allows the terminal-to-gateway link and the gateway-to-base station link in the M2M group to transmit data concurrently on the same frequency band, and coordinates the transmission power control of the terminal and the gateway in the M2M group A cooperative control method for gateway and terminal transmit power in a layered M2M network with non-orthogonal spectrum multiplexing.

为实现上述技术目的，本发明的分层M2M网络中网关和终端发射功率的协同控制方法，利用M2M网络系统构成分层M2M网络，所述的M2M网络系统包括基站和无线M2M群组，所述无线M2M群组由无线M2M网关和K(K≥1)个无线M2M终端组成，每个无线M2M终端上设有一支天线，无线M2M网关上分别设有用于信号发射和用于信号的接收的两支天线，其中，无线M2M网关为无线移动设备，无线M2M网关为K个无线M2M终端与基站之间信息连接的中继节点，无线M2M网关与无线M2M终端之间采用时、频域全双工数据中继技术，允许M2M网关和任一M2M终端在同一频段并发传输数据，其特征在于所述网关和终端发射功率的协同控制方法步骤如下：In order to achieve the above technical purpose, the coordinated control method of gateway and terminal transmit power in a layered M2M network of the present invention uses an M2M network system to form a layered M2M network. The M2M network system includes a base station and a wireless M2M group. A wireless M2M group consists of a wireless M2M gateway and K (K≥1) wireless M2M terminals, each wireless M2M terminal is provided with an antenna, and the wireless M2M gateway is provided with two antennas for signal transmission and signal reception respectively. The wireless M2M gateway is a wireless mobile device, and the wireless M2M gateway is a relay node for information connection between K wireless M2M terminals and the base station. The data relay technology allows the M2M gateway and any M2M terminal to transmit data concurrently in the same frequency band, and is characterized in that the steps of the coordinated control method of the transmit power of the gateway and the terminal are as follows:

a.启动M2M网络系统构建分层M2M网络：利用控制信息传输信道建立无线M2M网关和基站之间的链接，为M2M群组中的K个无线M2M终端定义标签编号，K个无线M2M终端通过蜂窝网络的控制信息传输信道(SDCCH,Stand-AloneDedicatedControlChannel)向无线M2M网关发送数据传输请求；无线M2M网关接收到无线M2M终端发出的数据传输请求信息后将请求信息通过SDCCH信道转发至基站；基站根据预设的单位周期时间内接收到的所有无线M2M网关数据传输请求信息后，为M2M网关分配K个信道用于传输K个M2M终端的数据，基站将总信道平均分成K个信道后为每个信道顺序编号，基站将K个分配信道信息利用SDCCH信道反馈给无线M2M网关并转发至K个M2M终端，即将第i个信道分配给第i个M2M终端进行数据传输；a. Start the M2M network system to build a hierarchical M2M network: use the control information transmission channel to establish the link between the wireless M2M gateway and the base station, define tag numbers for K wireless M2M terminals in the M2M group, and K wireless M2M terminals pass through the cellular The network control information transmission channel (SDCCH, Stand-Alone Dedicated Control Channel) sends a data transmission request to the wireless M2M gateway; the wireless M2M gateway forwards the request information to the base station through the SDCCH channel after receiving the data transmission request information sent by the wireless M2M terminal; After receiving all the wireless M2M gateway data transmission request information within the set unit cycle time, allocate K channels for the M2M gateway to transmit the data of K M2M terminals, and the base station divides the total channel into K channels on average. Sequentially numbered, the base station feeds K allocated channel information back to the wireless M2M gateway using the SDCCH channel and forwards it to K M2M terminals, that is, allocates the i-th channel to the i-th M2M terminal for data transmission;

b.根据LTE/LTE-A蜂窝网络无线链路控制协议(RLC,RadioLinkControl)，每个无线M2M终端通过所分配的信道与无线M2M网关建立无线通信链路，无线M2M网关与基站建立无线通信链路；b. According to the LTE/LTE-A cellular network radio link control protocol (RLC, RadioLinkControl), each wireless M2M terminal establishes a wireless communication link with the wireless M2M gateway through the allocated channel, and the wireless M2M gateway establishes a wireless communication link with the base station road;

c.无线M2M网关通过LTE网络提供的公共导频信道(CPICH,CommonPilotChannel)以及专用物理控制信道(DPCCH,DedicatedPhysicalControlChannel)获取其自身与基站之间的工作信道状态参数h_G，B和h_G，G，每个无线M2M终端获取其自身与无线M2M网关工作信道的信道状态参数h_i，G和h_i，B，每个无线M2M终端通过SDCCH信道将自身获取的信道状态参数h_i，G和h_i，B，并附上自身编号标签后反馈至无线M2M网关；c. The wireless M2M gateway obtains the working channel state parameters h _{G, B} and h _{G, G} between itself and the base station through the common pilot channel (CPICH, CommonPilotChannel) and dedicated physical control channel (DPCCH, DedicatedPhysicalControlChannel) provided by the LTE network , each wireless M2M terminal obtains the channel state parameters h _{i, G} and h _{i, B} of the working channel between itself and the wireless M2M gateway, and each wireless M2M terminal obtains the channel state parameters h i, _G and h obtained by itself through the SDCCH channel _{i, B} , and feed back to the wireless M2M gateway after attaching its own serial number label;

d.无线M2M网关计算信道增益参数：由于无线M2M网关和无线M2M终端之间以并行发射的方式进行无线广播，无线M2M终端的发射会对基站接收无线M2M网关的数据造成共信道干扰，因此将无线M2M终端与基站之间的链路可以看作是一个干扰链路，无线M2M网关利用公式：计算任意第i个无线M2M终端与基站之间干扰链路的信道增益r_i,B，利用公式：计算第i个无线M2M终端与无线M2M网关之间干扰链路的信道增益r_i,G，利用公式计算无线M2M网关与基站之间的信道增益r_G,B，利用公式计算无线M2M网关自身的发射天线与接收电线之间的信道增益r_S,I；d. The wireless M2M gateway calculates the channel gain parameter: Since the wireless M2M gateway and the wireless M2M terminal perform wireless broadcasting in parallel transmission, the transmission of the wireless M2M terminal will cause co-channel interference to the data received by the wireless M2M gateway by the base station, so the The link between the wireless M2M terminal and the base station can be regarded as an interference link, and the wireless M2M gateway uses the formula: Calculate the channel gain r _i,B of the interference link between any i-th wireless M2M terminal and the base station, using the formula: Calculate the channel gain r _i,G of the interference link between the i-th wireless M2M terminal and the wireless M2M gateway, using the formula Calculate the channel gain r _G,B between the wireless M2M gateway and the base station, using the formula Calculating the channel gain r _S,I between the transmitting antenna of the wireless M2M gateway itself and the receiving wire;

e.无线M2M网关通过线M2M终端反馈的信道状态参数h_i，G和h_i，B，利用公式：计算控制第i个无线M2M终端所需要的发射功率参数 e. The channel state parameters h _{i, G} and h _{i, B} fed back by the wireless M2M gateway through the wire M2M terminal, use the formula: Calculate the transmission power parameters required to control the i-th wireless M2M terminal

无线M2M网关利用公式：计算控制无线M2M网关自身的发射功率参数无线M2M网关使用功率中继第i个无线M2M终端的数据，式中为传输周期T内第i个M2M终端需要向基站传输的比特数据，w为分配给第i(i＝1,2,...,K)个M2M终端的传输带宽；Wireless M2M gateway utilization formula: Calculate and control the transmission power parameters of the wireless M2M gateway itself Wireless M2M Gateway Power Usage Relay the data of the i-th wireless M2M terminal, where is the bit data that the i-th M2M terminal needs to transmit to the base station in the transmission period T, and w is the transmission bandwidth allocated to the i-th (i=1,2,...,K) M2M terminal;

f.无线M2M网关通过判断：当第i个无线M2M终端的实际发射功率与第i个无线M2M终端额定最大发射功率P_M的关系为并且无线M2M网关的实际发射功率参数与无线M2M网关为中继第i个无线M2M终端的数据额定最大发射功率P_G的关系为时，则无线M2M网关设置第i个无线M2M终端的最优发射功率设置中继第i个无线M2M终端数据的最优发射功率否则，当或者时，则无线M2M网关设置第i个无线M2M终端的最优发射功率为设置中继第i个无线M2M终端数据的最优发射功率为 f. The wireless M2M gateway passes the judgment: when the actual transmission power of the i-th wireless M2M terminal The relationship with the rated maximum transmission power P _M of the i-th wireless M2M terminal is And the actual transmission power parameters of the wireless M2M gateway The relationship between the wireless M2M gateway and the data rated maximum transmission power _PG of the i-th wireless M2M terminal for relaying is , the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal Set the optimal transmission power for relaying the i-th wireless M2M terminal data Otherwise, when or , the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal as Set the optimal transmission power for relaying the i-th wireless M2M terminal data to

g.无线M2M网关依次针对每个无线M2M终端重复步骤f获得所有K个无线M2M终端的最优功率控制策略i＝1,2,...,K，并将最优功率控制策略i＝1,2,...,K分别反馈给相对应编号的所有无线M2M终端从而完成一次无线M2M网关和无线M2M终端发射功率的协同控制流程；g. The wireless M2M gateway repeats step f for each wireless M2M terminal in turn to obtain the optimal power control strategy for all K wireless M2M terminals i=1,2,...,K, and the optimal power control strategy i=1, 2, ..., K are respectively fed back to all wireless M2M terminals with corresponding numbers to complete a cooperative control process of the transmission power of the wireless M2M gateway and the wireless M2M terminal;

h.根据需要重复步骤a开始下一个数据传输周期。h. Repeat step a as needed to start the next data transmission cycle.

所述无线M2M网关作为无线M2M群组的网络管理节点，负责收集群组中所有无线M2M终端的数据传输请求信息并转发至基站，最终由基站为各无线M2M终端分配传输信道，该分配结果先由基站反馈给无线M2M网关，再由无线M2M网关反馈给各无线M2M终端。As the network management node of the wireless M2M group, the wireless M2M gateway is responsible for collecting the data transmission request information of all wireless M2M terminals in the group and forwarding it to the base station, and finally the base station allocates transmission channels for each wireless M2M terminal. The base station feeds back to the wireless M2M gateway, and then the wireless M2M gateway feeds back to each wireless M2M terminal.

所述分层M2M网络在LTE/LTE-A蜂窝网络中，每个数据传输信道为1个频宽为180KHz的正交频分复用(OFDMA,OrthogonalFrequencyDivisionMultipleAccess)子载波，系统中任意第i个无线M2M终端被系统分配1个信道用于数据传输；无线M2M网关可以在K个信道上同时接收和发送数据，具体为无线M2M网关采用全双工中继协议在第i个无线M2M终端工作的信道上接收其数据并将该数据在同一信道上并行转发至基站。In the layered M2M network in the LTE/LTE-A cellular network, each data transmission channel is an Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) subcarrier with a bandwidth of 180KHz, and any i-th wireless channel in the system The M2M terminal is allocated 1 channel by the system for data transmission; the wireless M2M gateway can receive and send data on K channels at the same time, specifically, the wireless M2M gateway uses the full-duplex relay protocol to work on the i-th wireless M2M terminal channel Receives its data on the channel and forwards the data in parallel to the base station on the same channel.

预设数据传输周期T，传输周期T为无线M2M传输业务的实时性需求调整，如果每个M2M终端需要在每1秒内完成至少10Kb数据的传输，则数据传输周期T定为1秒，所述在任一数据传输周期T内第i个无线M2M终端获得的数据吞吐量为：，无线M2M网关与第i个无线M2M终端工作的信道上获得的数据吞吐量为： R i G = wTlog 2 ( 1 + p i G &gamma; G , B 1 + p i M &gamma; i , B ) . The preset data transmission period T is adjusted for the real-time requirements of the wireless M2M transmission service. If each M2M terminal needs to complete the transmission of at least 10Kb data within 1 second, the data transmission period T is set to 1 second, so The data throughput obtained by the i-th wireless M2M terminal in any data transmission period T is: , the data throughput obtained on the working channel between the wireless M2M gateway and the i-th wireless M2M terminal is: R i G = wxya 2 ( 1 + p i G &gamma; G , B 1 + p i m &gamma; i , B ) .

所述分层M2M网络系统在能耗最小的前提下满足任意第i个无线M2M终端的吞吐量需求以及最大时延限制T，最优数学建模为：The hierarchical M2M network system satisfies the throughput requirement of any i-th wireless M2M terminal on the premise of minimum energy consumption And the maximum delay limit T, the optimal mathematical modeling is:

minmin EE. ,, EE. == &Sigma;&Sigma; kk == 11 KK pp ii Mm

约束条件： R i M = L i M , p i M &le; P M , i = 1 , 2 , ... , K Restrictions: R i m = L i m , p i m &le; P m , i = 1 , 2 , ... , K

RR ii GG == LL ii Mm ,, pp ii GG &le;&le; PP GG ,, ii == 11 ,, 22 ,, ...... ,, KK ;;

无线M2M网关得到用于控制无线M2M终端以及无线M2M网关自身发射功率的参数和 The wireless M2M gateway obtains the parameters used to control the transmission power of the wireless M2M terminal and the wireless M2M gateway itself and

当任意第i个无线M2M终端的参数或者参数时，表明给定时延约束T以及额定最大发射功率约束P_M和P_G，则不存在能耗最小的前提下满足任意第i个无线M2M终端的吞吐量需求以及最大时延限制T的最优数学建模，即第i个无线M2M终端的数据传输需求在该数据传输周期无法被系统满足，因此，无线M2M网关将第i个无线M2M终端的最优发射功率设置为将为中继第i个无线M2M终端数据的最优发射功率设置为达到延缓第i个无线M2M终端进行数据传输的目的。When the parameters of any i-th wireless M2M terminal or parameter , it shows that given the delay constraint T and the rated maximum transmit power constraints P _M and _PG , there is no minimum energy consumption to meet the throughput requirements of any i-th wireless M2M terminal And the optimal mathematical modeling of the maximum delay limit T, that is, the data transmission requirements of the i-th wireless M2M terminal The data transmission period cannot be satisfied by the system, therefore, the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal to The optimal transmission power for relaying the data of the i-th wireless M2M terminal is set to The purpose of delaying the data transmission of the i-th wireless M2M terminal is achieved.

有益效果：本发明的控制方法针对分层的M2M蜂窝网络架构，适用于大规模M2M终端的数据传输，传输使用全双工中继传输，允许M2M群组内的终端至网关链路以及网关至基站链路在同一频段上并发传输数据，有效提高蜂窝网络的频谱资源利用率；通过调整发射功率可以有效改善终端至网关链路以及网关至基站链路的信号功率与干扰噪声功率比例即信干噪比，从而最小化M2M终端的能耗、满足M2M通信的最小时延要求。Beneficial effects: the control method of the present invention is aimed at the layered M2M cellular network architecture, and is suitable for data transmission of large-scale M2M terminals. The transmission uses full-duplex relay transmission, allowing the terminal-to-gateway link in the M2M group and the gateway-to-gateway link. The base station link transmits data concurrently on the same frequency band, effectively improving the spectrum resource utilization of the cellular network; by adjusting the transmission power, the ratio of signal power to interference noise power, that is, signal interference, between the terminal to the gateway link and the gateway to the base station link can be effectively improved. Noise ratio, so as to minimize the energy consumption of the M2M terminal and meet the minimum delay requirement of M2M communication.

附图说明Description of drawings

图1是本发明的分层M2M蜂窝网络系统组成示意图；FIG. 1 is a schematic diagram of the composition of the layered M2M cellular network system of the present invention;

图2是本发明的传输信道和发射功率分配示意图；Fig. 2 is a schematic diagram of transmission channel and transmit power allocation in the present invention;

图3是本发明的无线M2M终端的传输时延需求被满足概率的示意图；FIG. 3 is a schematic diagram of the probability that the transmission delay requirement of the wireless M2M terminal is met in the present invention;

图4是本发明的全部无线M2M终端传输能耗示意图。Fig. 4 is a schematic diagram of transmission energy consumption of all wireless M2M terminals according to the present invention.

具体实施方式detailed description

为使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明做进一步详细描述。In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

如图1所示，本发明的分层M2M网络中网关和终端发射功率的协同控制方法，了在蜂窝移动网络中更好的兼容大规模M2M通信，引入一种新的网络设备“M2M网关”，为形成分层的蜂窝网络架构；利用M2M网络系统构成分层M2M网络，所述的M2M网络系统包括基站和无线M2M群组，所述无线M2M群组由无线M2M网关和K(K≥1)个无线M2M终端组成，每个无线M2M终端上设有一支天线，无线M2M网关上分别设有用于信号发射和用于信号的接收的两支天线，其中，无线M2M网关为无线移动设备，无线M2M网关为K个无线M2M终端与基站之间信息连接的中继节点，无线M2M网关与无线M2M终端之间采用时、频域全双工数据中继技术，允许M2M网关和任一M2M终端在同一频段并发传输数据，As shown in Figure 1, the coordinated control method of gateway and terminal transmission power in the layered M2M network of the present invention has better compatibility with large-scale M2M communication in the cellular mobile network, and introduces a new network device "M2M gateway" , in order to form a layered cellular network architecture; using an M2M network system to form a layered M2M network, the M2M network system includes a base station and a wireless M2M group, and the wireless M2M group consists of a wireless M2M gateway and K (K≥1 ) wireless M2M terminals, each wireless M2M terminal is equipped with an antenna, and the wireless M2M gateway is respectively equipped with two antennas for signal transmission and signal reception, wherein the wireless M2M gateway is a wireless mobile device, and the wireless M2M gateway is equipped with two antennas for signal transmission and signal reception. The M2M gateway is the relay node for the information connection between K wireless M2M terminals and the base station. The time and frequency domain full-duplex data relay technology is used between the wireless M2M gateway and the wireless M2M terminal, allowing the M2M gateway and any M2M terminal Concurrent transmission of data in the same frequency band,

无线M2M网关通过无线信道和基站以及一组地理位置相邻近的无线M2M终端连接，它负责管理所连接的无线M2M终端，收集、缓存无线M2M终端产生的数据再将这些数据集中转发至基站，基站、M2M网关以及K个无线M2M终端构成系统的全部网络设备，无线M2M网关作为K个无线M2M终端与基站之间的中继节点，采用时、频域全双工数据中继技术，允许无线M2M网关和任一M2M终端在同一频段并发传输数据；无线M2M网关采用频分多址(FDMA)技术对K个无线M2M终端进行媒质接入控制，用W(单位Hz)表示系统所占用的频谱带宽，用T(单位s)表示无线M2M群组的数据传输周期(即网络系统频谱资源分配和发射功率控制的周期)，在任意数据传输周期T中，网络系统分配给第i(i＝1,2,...,K)个无线M2M终端的传输带宽为w＝W/K(单位Hz)，无线M2M网关以及K个M2M终端的时、频域资源分配模式如图2所示；用h_i，G表示第i个无线M2M终端与M2M网关之间的信道系数，用h_i，B表示第i个无线M2M终端与基站之间的信道系数，用h_G，B表示无线M2M网关与基站之间的信道系数，用h_G，G表示无线M2M网关的发射天线与接收电线之间的信道系数，用n_B表示基站接收机的加性高斯白噪声，用n_G表示无线M2M网关的加性高斯白噪声，假设网络系统中所有信道系数和接收机噪声在T内保持不变；在任一数据传输周期T内，第i个无线M2M终端需要向基站传输比特数据，作为中继节点，无线M2M网关一方面需要接收K个无线M2M终端的数据(共计比特)，另一方面需要将这L_G比特数据转发至基站；用表示第i个无线M2M终端的发射功率，用P_M表示第i个无线M2M终端可用的最大发射功率；用表示无线M2M网关为中继第i个M2M终端的数据所使用的发射功率，用P_G表示无线M2M网关为中继第i个M2M终端的数据可用的最大发射功率；对系统中的无线M2M网关以及K个无线M2M终端的发射功率协同控制方法流程如下：The wireless M2M gateway connects with the base station and a group of wireless M2M terminals with adjacent geographic locations through a wireless channel. It is responsible for managing the connected wireless M2M terminals, collecting and buffering the data generated by the wireless M2M terminals, and then forwarding these data to the base station. The base station, M2M gateway and K wireless M2M terminals constitute all the network equipment of the system. The wireless M2M gateway is used as the relay node between the K wireless M2M terminals and the base station. It adopts time and frequency domain full-duplex data relay technology, allowing wireless The M2M gateway and any M2M terminal transmit data concurrently in the same frequency band; the wireless M2M gateway uses frequency division multiple access (FDMA) technology to control the medium access of K wireless M2M terminals, and W (unit Hz) represents the spectrum occupied by the system Bandwidth, using T (unit s) to represent the data transmission cycle of the wireless M2M group (that is, the cycle of network system spectrum resource allocation and transmission power control), in any data transmission cycle T, the network system allocates to the i (i=1 ,2,...,K) The transmission bandwidth of wireless M2M terminals is w=W/K (unit Hz), and the time and frequency domain resource allocation modes of wireless M2M gateways and K M2M terminals are shown in Figure 2; h _{i, G} represents the channel coefficient between the i-th wireless M2M terminal and the M2M gateway, h _{i, B} represents the channel coefficient between the i-th wireless M2M terminal and the base station, and h _{G, B} represents the channel coefficient between the wireless M2M gateway and the M2M gateway The channel coefficient between base stations, use h _{G, G} to represent the channel coefficient between the transmitting antenna of the wireless M2M gateway and the receiving wire, use n _B to represent the additive white Gaussian noise of the base station receiver, and use n _G to represent the wireless M2M gateway’s Additive white Gaussian noise, assuming that all channel coefficients and receiver noise in the network system remain unchanged within T; in any data transmission period T, the i-th wireless M2M terminal needs to transmit Bit data, as a relay node, the wireless M2M gateway needs to receive the data of K wireless M2M terminals (a total of bit), on the other hand, this L _G bit data needs to be forwarded to the base station; Indicates the transmission power of the i-th wireless M2M terminal, and P _M represents the maximum available transmission power of the i-th wireless M2M terminal; Indicates the transmission power used by the wireless M2M gateway to relay the data of the i-th M2M terminal, and _PG represents the maximum transmission power available for the wireless M2M gateway to relay the data of the i-th M2M terminal; for the wireless M2M gateway in the system And the flow of the transmission power cooperative control method of K wireless M2M terminals is as follows:

a.启动M2M网络系统构建分层M2M网络：利用控制信息传输信道建立无线M2M网关和基站之间的链接，为M2M群组中的K个无线M2M终端定义标签编号，K个无线M2M终端通过蜂窝网络的控制信息传输信道(SDCCH,Stand-AloneDedicatedControlChannel)向无线M2M网关发送数据传输请求；无线M2M网关接收到无线M2M终端发出的数据传输请求信息后将请求信息通过SDCCH信道转发至基站；基站根据预设的单位周期时间内接收到的所有无线M2M网关数据传输请求信息后，为M2M网关分配K个信道用于传输K个M2M终端的数据，基站将总信道平均分成K个信道后为每个信道顺序编号，基站将K个分配信道信息利用SDCCH信道反馈给无线M2M网关并转发至K个M2M终端，即将第i个信道分配给第i个M2M终端进行数据传输；a. Start the M2M network system to build a hierarchical M2M network: use the control information transmission channel to establish the link between the wireless M2M gateway and the base station, define tag numbers for K wireless M2M terminals in the M2M group, and K wireless M2M terminals pass through the cellular The network control information transmission channel (SDCCH, Stand-Alone Dedicated Control Channel) sends a data transmission request to the wireless M2M gateway; the wireless M2M gateway forwards the request information to the base station through the SDCCH channel after receiving the data transmission request information sent by the wireless M2M terminal; After receiving all the wireless M2M gateway data transmission request information within the set unit cycle time, allocate K channels for the M2M gateway to transmit the data of K M2M terminals, and the base station divides the total channel into K channels on average. Sequentially numbered, the base station feeds K allocated channel information back to the wireless M2M gateway using the SDCCH channel and forwards it to K M2M terminals, that is, allocates the i-th channel to the i-th M2M terminal for data transmission;

b.根据LTE/LTE-A蜂窝网络无线链路控制协议(RLC,RadioLinkControl)，每个无线M2M终端通过所分配的信道与无线M2M网关建立无线通信链路，无线M2M网关与基站建立无线通信链路；b. According to the LTE/LTE-A cellular network radio link control protocol (RLC, RadioLinkControl), each wireless M2M terminal establishes a wireless communication link with the wireless M2M gateway through the allocated channel, and the wireless M2M gateway establishes a wireless communication link with the base station road;

c.无线M2M网关通过LTE网络提供的公共导频信道(CPICH,CommonPilotChannel)以及专用物理控制信道(DPCCH,DedicatedPhysicalControlChannel)获取其自身与基站之间的工作信道状态参数h_G，B和h_G，G，每个无线M2M终端获取其自身与无线M2M网关工作信道的信道状态参数h_i，G和h_i，B，每个无线M2M终端通过SDCCH信道将自身获取的信道状态参数h_i，G和h_i，B，并附上自身编号标签后反馈至无线M2M网关；c. The wireless M2M gateway obtains the working channel state parameters h _{G, B} and h _{G, G} between itself and the base station through the common pilot channel (CPICH, CommonPilotChannel) and dedicated physical control channel (DPCCH, DedicatedPhysicalControlChannel) provided by the LTE network , each wireless M2M terminal obtains the channel state parameters h _{i, G} and h _{i, B} of the working channel between itself and the wireless M2M gateway, and each wireless M2M terminal obtains the channel state parameters h i, _G and h obtained by itself through the SDCCH channel _{i, B} , and feed back to the wireless M2M gateway after attaching its own serial number label;

d.无线M2M网关计算信道增益参数：由于无线M2M网关和无线M2M终端之间以并行发射的方式进行无线广播，无线M2M终端的发射会对基站接收无线M2M网关的数据造成共信道干扰，因此将无线M2M终端与基站之间的链路可以看作是一个干扰链路，无线M2M网关利用公式：计算任意第i个无线M2M终端与基站之间干扰链路的信道增益r_i,B，利用公式：计算第i个无线M2M终端与无线M2M网关之间干扰链路的信道增益r_i,G，利用公式计算无线M2M网关与基站之间的信道增益r_G,B，利用公式计算无线M2M网关自身的发射天线与接收电线之间的信道增益r_S,I；计算信道增益是为了进行功率控制，从而满足每个无线M2M终端的数据吞吐量；d. The wireless M2M gateway calculates the channel gain parameter: Since the wireless M2M gateway and the wireless M2M terminal perform wireless broadcasting in parallel transmission, the transmission of the wireless M2M terminal will cause co-channel interference to the data received by the wireless M2M gateway by the base station, so the The link between the wireless M2M terminal and the base station can be regarded as an interference link, and the wireless M2M gateway uses the formula: Calculate the channel gain r _i,B of the interference link between any i-th wireless M2M terminal and the base station, using the formula: Calculate the channel gain r _i,G of the interference link between the i-th wireless M2M terminal and the wireless M2M gateway, using the formula Calculate the channel gain r _G,B between the wireless M2M gateway and the base station, using the formula Calculating the channel gain r _S,I between the transmitting antenna of the wireless M2M gateway itself and the receiving wire; calculating the channel gain is for power control, so as to meet the data throughput of each wireless M2M terminal;

e.无线M2M网关通过线M2M终端反馈的信道状态参数h_i，G和h_i，B，利用公式：计算控制第i个无线M2M终端所需要的发射功率参数 e. The channel state parameters h _{i, G} and h _{i, B} fed back by the wireless M2M gateway through the wire M2M terminal, use the formula: Calculate the transmission power parameters required to control the i-th wireless M2M terminal

无线M2M网关利用公式：计算控制无线M2M网关自身的发射功率参数无线M2M网关使用功率中继第i个无线M2M终端的数据，式中为传输周期T内第i个M2M终端需要向基站传输的比特数据，w为分配给第i(i＝1,2,...,K)个M2M终端的传输带宽；Wireless M2M gateway utilization formula: Calculate and control the transmission power parameters of the wireless M2M gateway itself Wireless M2M Gateway Power Usage Relay the data of the i-th wireless M2M terminal, where is the bit data that the i-th M2M terminal needs to transmit to the base station in the transmission period T, and w is the transmission bandwidth allocated to the i-th (i=1,2,...,K) M2M terminal;

f.无线M2M网关通过判断：当第i个无线M2M终端的实际发射功率与第i个无线M2M终端额定最大发射功率P_M的关系为并且无线M2M网关的实际发射功率参数与无线M2M网关为中继第i个无线M2M终端的数据额定最大发射功率P_G的关系为时，则无线M2M网关设置第i个无线M2M终端的最优发射功率设置中继第i个无线M2M终端数据的最优发射功率否则，当或者时，则无线M2M网关设置第i个无线M2M终端的最优发射功率为设置中继第i个无线M2M终端数据的最优发射功率为 f. The wireless M2M gateway passes the judgment: when the actual transmission power of the i-th wireless M2M terminal The relationship with the rated maximum transmission power P _M of the i-th wireless M2M terminal is And the actual transmission power parameters of the wireless M2M gateway The relationship between the wireless M2M gateway and the data rated maximum transmission power _PG of the i-th wireless M2M terminal for relaying is , the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal Set the optimal transmission power for relaying the i-th wireless M2M terminal data Otherwise, when or , the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal as Set the optimal transmission power for relaying the i-th wireless M2M terminal data to

g.无线M2M网关依次针对每个无线M2M终端重复步骤f获得所有K个无线M2M终端的最优功率控制策略i＝1,2,...,K，并将最优功率控制策略i＝1,2,...,K分别反馈给相对应编号的所有无线M2M终端从而完成一次无线M2M网关和无线M2M终端发射功率的协同控制流程；g. The wireless M2M gateway repeats step f for each wireless M2M terminal in turn to obtain the optimal power control strategy for all K wireless M2M terminals i=1,2,...,K, and the optimal power control strategy i=1, 2, ..., K are respectively fed back to all wireless M2M terminals with corresponding numbers to complete a cooperative control process of the transmission power of the wireless M2M gateway and the wireless M2M terminal;

h.根据需要重复步骤a开始下一个数据传输周期。h. Repeat step a as needed to start the next data transmission cycle.

所述无线M2M网关作为无线M2M群组的网络管理节点，负责收集群组中所有无线M2M终端的数据传输请求信息并转发至基站，最终由基站为各无线M2M终端分配传输信道，该分配结果先由基站反馈给无线M2M网关，再由无线M2M网关反馈给各无线M2M终端；As the network management node of the wireless M2M group, the wireless M2M gateway is responsible for collecting the data transmission request information of all wireless M2M terminals in the group and forwarding it to the base station, and finally the base station allocates transmission channels for each wireless M2M terminal. The base station feeds back to the wireless M2M gateway, and then the wireless M2M gateway feeds back to each wireless M2M terminal;

所述分层M2M网络在LTE/LTE-A蜂窝网络中，每个数据传输信道为1个频宽为180KHz的正交频分复用(OFDMA,OrthogonalFrequencyDivisionMultipleAccess)子载波，系统中任意第i个无线M2M终端被系统分配1个信道用于数据传输；无线M2M网关可以在K个信道上同时接收和发送数据，具体为无线M2M网关采用全双工中继协议在第i个无线M2M终端工作的信道上接收其数据并将该数据在同一信道上并行转发至基站。In the layered M2M network in the LTE/LTE-A cellular network, each data transmission channel is an Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) subcarrier with a bandwidth of 180KHz, and any i-th wireless channel in the system The M2M terminal is allocated 1 channel by the system for data transmission; the wireless M2M gateway can receive and send data on K channels at the same time, specifically, the wireless M2M gateway uses the full-duplex relay protocol to work on the i-th wireless M2M terminal channel Receives its data on the channel and forwards the data in parallel to the base station on the same channel.

预设数据传输周期T，传输周期T为无线M2M传输业务的实时性需求调整，如果每个M2M终端需要在每1秒内完成至少10Kb数据的传输，则数据传输周期T定为1秒，所述在任一数据传输周期T内第i个无线M2M终端获得的数据吞吐量为：，无线M2M网关与第i个无线M2M终端工作的信道上获得的数据吞吐量为： R i G = wTlog 2 ( 1 + p i G &gamma; G , B 1 + p i M &gamma; i , B ) . The preset data transmission period T is adjusted for the real-time requirements of the wireless M2M transmission service. If each M2M terminal needs to complete the transmission of at least 10Kb data within 1 second, the data transmission period T is set to 1 second, so The data throughput obtained by the i-th wireless M2M terminal in any data transmission period T is: , the data throughput obtained on the working channel between the wireless M2M gateway and the i-th wireless M2M terminal is: R i G = wxya 2 ( 1 + p i G &gamma; G , B 1 + p i m &gamma; i , B ) .

所述分层M2M网络系统在能耗最小的前提下满足任意第i个无线M2M终端的吞吐量需求以及最大时延限制T，最优数学建模为：The hierarchical M2M network system satisfies the throughput requirement of any i-th wireless M2M terminal on the premise of minimum energy consumption And the maximum delay limit T, the optimal mathematical modeling is:

minmin EE. ,, EE. == &Sigma;&Sigma; kk == 11 KK pp ii Mm

约束条件： R i M = L i M , p i M &le; P M , i = 1 , 2 , ... , K Restrictions: R i m = L i m , p i m &le; P m , i = 1 , 2 , ... , K

RR ii GG == LL ii Mm ,, pp ii GG &le;&le; PP GG ,, ii == 11 ,, 22 ,, ...... ,, KK ;;

无线M2M网关得到用于控制无线M2M终端以及无线M2M网关自身发射功率的参数和 The wireless M2M gateway obtains the parameters used to control the transmission power of the wireless M2M terminal and the wireless M2M gateway itself and

当任意第i个无线M2M终端的参数或者参数时，表明给定时延约束T以及额定最大发射功率约束P_M和P_G，则不存在能耗最小的前提下满足任意第i个无线M2M终端的吞吐量需求以及最大时延限制T的最优数学建模，即第i个无线M2M终端的数据传输需求在该数据传输周期无法被系统满足，因此，无线M2M网关将第i个无线M2M终端的最优发射功率设置为将为中继第i个无线M2M终端数据的最优发射功率设置为达到延缓第i个无线M2M终端进行数据传输的目的。When the parameters of any i-th wireless M2M terminal or parameter , it shows that given the delay constraint T and the rated maximum transmit power constraints P _M and _PG , there is no minimum energy consumption to meet the throughput requirements of any i-th wireless M2M terminal And the optimal mathematical modeling of the maximum delay limit T, that is, the data transmission requirements of the i-th wireless M2M terminal The data transmission period cannot be satisfied by the system, therefore, the wireless M2M gateway sets the optimal transmission power of the i-th wireless M2M terminal to The optimal transmission power for relaying the data of the i-th wireless M2M terminal is set to The purpose of delaying the data transmission of the i-th wireless M2M terminal is achieved.

下面介绍具体的实施例及其性能分析：参照图1给出的分层M2M蜂窝系统结构示意图，作如下系统参数设置：系统中的无线M2M群组共有20个无线M2M终端，无线M2M通信容许的最大数据传输时延(即系统的频谱、发射功率资源分配周期)为T＝1s，系统所占用的频宽为W＝180×K＝180×20＝3.6KHz，基站和无线M2M网关的接收机噪声方差为10^-7；基站与无线M2M网关的距离在500m与1000m之间随机变化，各无线M2M终端与无线M2M网关的距离在50m至100m之间随机变化，各信道的大尺度路径衰落0.097/d^3.76，其中d是发射机与接收机之间的距离；M2M网关的最大发射功率为P_G＝24dBmW，每个M2M终端的最大发射功率为P_M＝14dBmW。仿真实验中，在每个数据传输周期T内，每个M2M终端的数据吞吐量需求从10Kbits增加到130Kbits，M2M网关的自干扰链路信道增益取值设为γ_SI＝{0dB，5dB，10dB，15dB}，并以理想状态γ_SI＝0(即M2M网关的发射天线和接收天线之间不存在自干扰)作为最优性能参照。The specific embodiment and its performance analysis are introduced below: Referring to the schematic structural diagram of the layered M2M cellular system shown in Fig. The maximum data transmission delay (that is, the frequency spectrum of the system, the transmission power resource allocation period) is T=1s, the bandwidth occupied by the system is W=180×K=180×20=3.6KHz, the receiver of the base station and the wireless M2M gateway The noise variance is 10 ^-7 ; the distance between the base station and the wireless M2M gateway varies randomly between 500m and 1000m, the distance between each wireless M2M terminal and the wireless M2M gateway varies randomly between 50m and 100m, and the large-scale path fading of each channel is 0.097 /d ^3.76 , where d is the distance between the transmitter and the receiver; the maximum transmit power of the M2M gateway is _PG =24dBmW, and the maximum transmit power of each M2M terminal is P _M =14dBmW. In the simulation experiment, in each data transmission cycle T, the data throughput requirement of each M2M terminal increases from 10Kbits to 130Kbits, and the value of the self-interference link channel gain of the M2M gateway is set to γ _SI = {0dB, 5dB, 10dB , 15dB}, and the ideal state γ _SI =0 (that is, there is no self-interference between the transmitting antenna and the receiving antenna of the M2M gateway) is used as the optimal performance reference.

如图3所示，随着无线M2M终端数据吞吐量需求的不断增加，采用本发明所提出的频谱资源分配和功率控制方案，每个无线M2M终端的传输时延被满足概率的示意图，随无线M2M终端数据吞吐量需求的不断增加，每个无线M2M终端的传输时延被满足的概率不断降低，当M2M网关的自干扰链路信道增益被限制在γ_SI≤5dB以下时，采用本发明所提出的方案能够较高程度的满足无线M2M终端的传输时延要求。As shown in Figure 3, as the data throughput requirements of wireless M2M terminals continue to increase, using the spectrum resource allocation and power control scheme proposed in the present invention, the schematic diagram of the probability that the transmission delay of each wireless M2M terminal is satisfied, as the wireless As the data throughput requirements of M2M terminals continue to increase, the probability that the transmission delay of each wireless M2M terminal is satisfied continues to decrease. When the channel gain of the self-interference link of the M2M gateway is limited below γ _SI ≤ 5dB, using The proposed scheme can satisfy the transmission delay requirement of wireless M2M terminals to a relatively high degree.

如图4所示，随着无线M2M终端数据吞吐量要求的不断增加，采用本发明所提出的频谱资源分配和功率控制方案，显示全部无线M2M终端完成数据传输消耗能量，随无线M2M终端数据吞吐量需求的不断增加，完成全部数据传输所消耗的能量不断增加，当无线M2M网关的自干扰链路信道增益被限制在γ_SI≤5dB以下时，采用本发明所提出方案的能量消耗接近于系统最优性能(即γ_SI＝0的系统性能曲线)。As shown in Figure 4, as the data throughput requirements of wireless M2M terminals continue to increase, using the spectrum resource allocation and power control scheme proposed by the present invention shows that all wireless M2M terminals consume energy for data transmission, and the data throughput of wireless M2M terminals With the continuous increase of traffic demand, the energy consumed to complete all data transmissions is constantly increasing. When the self-interference link channel gain of the wireless M2M gateway is limited below γ _SI ≤ 5dB, the energy consumption of the scheme proposed by the present invention is close to that of the system Optimal performance (ie system performance curve for γ _SI =0).