CN104767586B - A kind of method and base station equipment of the transmission of control detection reference signal - Google Patents

本发明实施例提供了一种控制SRS的发送的方法及基站设备，用于降低SRS对上行无线资源的占用，提升上行吞吐量；该方法包括：基站确定终端的信道状态信息；所述基站根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式；当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS。

Embodiments of the present invention provide a method for controlling SRS transmission and base station equipment, which are used to reduce the occupation of uplink wireless resources by SRS and improve uplink throughput; the method includes: the base station determines the channel state information of the terminal; the base station according to The channel state information determines the beamforming method adopted by the terminal to transmit data; when it is determined that the beamforming method is codebook-based beamforming, an indication message is sent to the terminal to indicate The terminal increases the sending period of the SRS, or instructs the terminal to send the SRS only when receiving the signaling from the base station.

一种控制探测用参考信号的发送的方法及基站设备Method and base station equipment for controlling sending of reference signal for sounding

技术领域technical field

本发明涉及通信技术领域，尤其涉及一种控制探测用参考信号的发送的方法及基站设备。The present invention relates to the field of communication technology, in particular to a method for controlling the transmission of a reference signal for detection and base station equipment.

背景技术Background technique

在第三代合作项目(3rd Generation Partnership Project,3GPP)的R8/R9版本的协议中，引入了采用基于上行探测用参考信号(Souding Reference Signal,SRS)计算赋形因子的多天线波束赋形方法的传输模式(Transmission Mode,TM)7与TM8，在R10版本的协议中引入了TM9，TM9支持基于码本的波束赋形。In the protocol of the R8/R9 version of the 3rd Generation Partnership Project (3GPP), a multi-antenna beamforming method based on the uplink sounding reference signal (Souding Reference Signal, SRS) to calculate the forming factor is introduced. The transmission mode (Transmission Mode, TM) 7 and TM8 of TM9 are introduced in the protocol of the R10 version, and TM9 supports codebook-based beamforming.

SRS可以在普通上行子帧上传输，也可以在上行导频时隙(Uplink Pilot TimeSlot,UpPTS)上传输，位于上行子帧的最后一个单载波频分多址(Single-carrierFrequency-Division Multiple Access,SC-FDMA)符号，由演进基站(evolved Node B,eNB)配置终端在某个时频资源上发送SRS以及终端发送SRS的长度。在时分双工(TimeDivision Duplex,TDD)系统中，SRS用于估计上行信道矩阵H，计算波束赋形的因子，以及选择调制编码方式(Modulation and Coding Scheme,MCS)和进行上行频率选择性调度等。The SRS can be transmitted on a normal uplink subframe, or on an uplink pilot time slot (Uplink Pilot TimeSlot, UpPTS), which is located in the last single-carrier frequency-division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) symbol, the evolved Node B (eNB) configures the terminal to send the SRS on a certain time-frequency resource and the length of the terminal to send the SRS. In a Time Division Duplex (TDD) system, SRS is used to estimate the uplink channel matrix H, calculate the beamforming factor, select the Modulation and Coding Scheme (MCS) and perform uplink frequency selective scheduling, etc. .

SRS由高层通过无线资源控制(Radio Resource Control,RRC)信令触发终端发送，包括事件性发送和周期性发送两种方式，事件性发送的方式为终端在接收到基站的信令时才会发送，周期性发送的方式支持2ms、5ms、10ms、20ms、40ms、80ms、160ms、320ms八种周期。The SRS is triggered by the upper layer through the radio resource control (Radio Resource Control, RRC) signaling to send the terminal, including event sending and periodic sending. The event sending method is that the terminal will only send when it receives the signaling from the base station. , the periodic sending method supports eight cycles of 2ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, and 320ms.

在基于码本的波束赋形方式下，终端计算并反馈预编码矩阵索引(PrecoodingMatrix Index,PMI)的同时还要根据下行信道状态信息参考符号(Channel StateInformation-Reference Signal,CSI-RS)计算出相应的秩指示(Rank Idcation,RI)和信道质量指示(Channel Quality Indicator,CQI)，并将这些测量信息反馈给基站，基站结合PMI以及其他测量信息得到预编码矩阵，并进行相应的波束赋形。In the codebook-based beamforming mode, the terminal calculates and feeds back the precoding matrix index (PrecoodingMatrix Index, PMI) and calculates the corresponding The rank indication (Rank Idcation, RI) and channel quality indicator (Channel Quality Indicator, CQI), and these measurement information are fed back to the base station, and the base station combines the PMI and other measurement information to obtain the precoding matrix and perform corresponding beamforming.

由此可见，基站确定采用基于码本的波束赋形方式时，主要依靠终端的测量信息反馈进行波束赋形，并未使用到SRS进行波束赋形，SRS的作用仅为维持为上行信道估计，作用大幅减弱。而频繁地上行发送SRS会占用一定上行无线资源，影响小区上行吞吐量。It can be seen that when the base station determines to adopt the codebook-based beamforming method, it mainly relies on the measurement information feedback of the terminal for beamforming, and does not use SRS for beamforming. The role of SRS is only to maintain uplink channel estimation. The effect is greatly weakened. Frequent uplink transmission of SRS will occupy certain uplink radio resources and affect the uplink throughput of the cell.

发明内容Contents of the invention

本发明实施例提供了一种控制探测用参考信号SRS的发送的方法及基站设备，用以解决基站确定采用基于码本的波束赋形方式时，SRS的作用较小，而频繁地上行发送SRS会占用一定上行无线资源，影响小区上行吞吐量的问题。Embodiments of the present invention provide a method and base station equipment for controlling the transmission of the sounding reference signal SRS, to solve the problem that when the base station determines to adopt the codebook-based beamforming method, the role of the SRS is small and the SRS is frequently sent uplink It will occupy certain uplink wireless resources and affect the uplink throughput of the cell.

本发明实施例提供的一种控制SRS的发送的方法包括：A method for controlling the sending of an SRS provided by an embodiment of the present invention includes:

基站确定终端的信道状态信息；The base station determines the channel state information of the terminal;

所述基站根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式；The base station determines, according to the channel state information, the beamforming method adopted for data transmission with the terminal;

当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS。When it is determined that the beamforming method is codebook-based beamforming, an indication message is sent to the terminal to instruct the terminal to increase the SRS transmission period, or to instruct the terminal to only receive the The base station sends the SRS during signaling.

本发明实施例提供的一种基站设备包括：A base station device provided by an embodiment of the present invention includes:

参数确定单元，用于确定终端的信道状态信息；a parameter determining unit, configured to determine channel state information of the terminal;

方式确定单元，用于根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式；a mode determining unit, configured to determine the beamforming mode adopted for data transmission with the terminal according to the channel state information;

指示单元，用于当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS。an indication unit, configured to send an indication message to the terminal when it is determined that the beamforming method is codebook-based beamforming, to instruct the terminal to increase the SRS transmission period, or to instruct the terminal to only Sending the SRS when receiving the signaling from the base station.

本发明实施例中，基站确定终端的信道状态信息，所述基站根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式，当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS；当采用基于码本的波束赋形方式时，基站不需要终端频繁反馈SRS，基站指示终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS，，降低了SRS对上行无线资源的占用，提升了上行吞吐量。In the embodiment of the present invention, the base station determines the channel state information of the terminal, and the base station determines the beamforming method used to transmit data with the terminal according to the channel state information. When it is determined that the beamforming method is based on code During the current beamforming, an indication message is sent to the terminal to instruct the terminal to increase the SRS transmission period, or to instruct the terminal to transmit SRS only when receiving the signaling from the base station; In this beamforming mode, the base station does not require the terminal to frequently feed back SRS, and the base station instructs the terminal to increase the SRS transmission period, or instructs the terminal to send SRS only when receiving signaling from the base station, which reduces the impact of SRS on the uplink The occupancy of wireless resources improves the uplink throughput.

附图说明Description of drawings

图1是本发明实施例提供的控制SRS的发送的方法的流程示意图；FIG. 1 is a schematic flowchart of a method for controlling the sending of an SRS provided by an embodiment of the present invention;

图2是本发明实施例提供的基站设备的结构示意图。Fig. 2 is a schematic structural diagram of a base station device provided by an embodiment of the present invention.

具体实施方式Detailed ways

本发明实施例提供了一种控制SRS的发送的方法及基站设备，用于使得当采用基于码本的波束赋形方式时，降低SRS对上行无线资源的占用，提升上行吞吐量。Embodiments of the present invention provide a method for controlling SRS transmission and base station equipment, which are used to reduce occupation of uplink radio resources by SRS and improve uplink throughput when a codebook-based beamforming method is adopted.

如图1所示，本发明实施例提供的一种控制SRS的发送的方法包括：As shown in FIG. 1, a method for controlling the sending of an SRS provided by an embodiment of the present invention includes:

S101、基站确定终端的信道状态信息；S101. The base station determines channel state information of the terminal;

S102、所述基站根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式；S102. The base station determines, according to the channel state information, a beamforming method adopted for data transmission with the terminal;

S103、当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS。S103. When it is determined that the beamforming method is codebook-based beamforming, send an indication message to the terminal to instruct the terminal to increase the SRS transmission cycle, or instruct the terminal to only receive The base station sends the SRS during signaling.

具体地，所述信道状态信息，包括以下参数中的至少一种：参考信号接收功率(Reference Signal Received Power,RSRP)，信道质量指示(Channel QualityIndicator,CQI)和调制编码方式(Modulation and Coding Scheme,MCS)。相应地，所述基站确定终端的信道状态信息，包括以下方式中的至少一种：所述基站接收所述终端上报的RSRP；所述基站接收所述终端上报的CQI；所述基站查询本地记录确定所述终端对应的MCS。Specifically, the channel state information includes at least one of the following parameters: Reference Signal Received Power (Reference Signal Received Power, RSRP), Channel Quality Indicator (Channel Quality Indicator, CQI) and Modulation and Coding Scheme (Modulation and Coding Scheme, MCS). Correspondingly, the base station determines the channel state information of the terminal, including at least one of the following methods: the base station receives the RSRP reported by the terminal; the base station receives the CQI reported by the terminal; the base station queries local records Determine the MCS corresponding to the terminal.

步骤S102中，所述基站确定以下条件中的至少一种被满足时，确定与所述终端传输数据所采用的波束赋形方式是基于码本的波束赋形：所述RSRP大于第一预设值；所述CQI的索引值大于第二预设值；所述MCS的索引值大于第三预设值。总之，当所述基站确定终端的信道条件较好时，采用基于码本的波束赋形方式。其中，当RSRP高于第一预设值时，基站认为该终端在小区中心位置，该终端信道条件较好；当RSRP低于第一预设值时，基站认为该终端在小区中心之外。当终端反馈的CQI的索引值高于第二预设值时，说明终端处于信道条件较好的位置。当MCS的索引值大于第三预设值时，说明终端处于信道条件较好的位置。上述条件的任一或一个以上的组合满足时，基站认为终端的信道条件较好，例如终端信号与干扰和噪声比(Signal to Interference plus Noise Ratio,SINR)较高，移动速度较低等，则基站配置天线传输模式为基于码本的波束赋形；否则，基站配置天线传输模式为基于SRS测量的波束赋形。In step S102, when the base station determines that at least one of the following conditions is met, it determines that the beamforming method adopted for data transmission with the terminal is codebook-based beamforming: the RSRP is greater than the first preset value; the index value of the CQI is greater than the second preset value; the index value of the MCS is greater than the third preset value. In short, when the base station determines that the channel condition of the terminal is good, the codebook-based beamforming manner is adopted. Wherein, when the RSRP is higher than the first preset value, the base station considers that the terminal is in the center of the cell, and the channel condition of the terminal is better; when the RSRP is lower than the first preset value, the base station considers that the terminal is outside the center of the cell. When the index value of the CQI fed back by the terminal is higher than the second preset value, it indicates that the terminal is in a position with better channel conditions. When the index value of the MCS is greater than the third preset value, it indicates that the terminal is in a position with better channel conditions. When any one or a combination of more than one of the above conditions is satisfied, the base station believes that the channel condition of the terminal is better, for example, the signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) of the terminal is higher, the moving speed is lower, etc., then The base station configures the antenna transmission mode as codebook-based beamforming; otherwise, the base station configures the antenna transmission mode as beamforming based on SRS measurement.

所述基站根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式，包括：所述基站根据预设周期内的全部信道状态信息确定信道状态信息中间值；所述基站根据所述信道状态信息中间值确定与所述终端传输数据所采用的波束赋形方式；或者，所述基站根据最近一次确定的信道状态信息确定与所述终端传输数据所采用的波束赋形方式。例如，基站每隔预设周期统计一次MCS的索引值的中间值，根据MCS的索引值的中间值与所述第三预设值的比较结果来判断信道条件是否能够支持基于码本的波束赋形；这样，能够避免网络状况的波动对波束赋形选择造成的干扰。The base station determines, according to the channel state information, the beamforming method adopted by the terminal to transmit data, including: the base station determines an intermediate value of channel state information according to all channel state information within a preset period; the base station determines an intermediate value of channel state information according to The intermediate value of the channel state information determines the beamforming method used for data transmission with the terminal; or, the base station determines the beamforming method used for data transmission with the terminal according to the latest determined channel state information. For example, the base station counts the median value of the MCS index value every preset period, and judges whether the channel condition can support codebook-based beamforming according to the comparison result between the median value of the MCS index value and the third preset value. In this way, the interference caused by the fluctuation of network conditions to the beamforming selection can be avoided.

较佳的，步骤S103中所述基站是通过RRC信令向所述终端发送指示消息。所述基站向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，包括：所述基站向所述终端发送指示消息，指示所述终端以指定发送周期发送SRS，所述指定发送周期大于所述终端发送SRS的预设发送周期。例如：终端的预设发送周期是10ms，基站指示终端重新配置为80ms。或者，所述基站向所述终端发送指示消息，用以指示所述终端仅当接收到所述基站的信令时发送SRS，基站在确定需要进行上行信道估计时指示终端发送SRS。Preferably, in step S103, the base station sends an indication message to the terminal through RRC signaling. The base station sends an indication message to the terminal to instruct the terminal to increase the sending period of the SRS, including: the base station sends an indication message to the terminal, instructing the terminal to send the SRS at a specified sending period, and the specified The sending period is greater than the preset sending period for the terminal to send the SRS. For example: the preset sending period of the terminal is 10ms, and the base station instructs the terminal to reconfigure it to 80ms. Alternatively, the base station sends an indication message to the terminal to instruct the terminal to send the SRS only when receiving signaling from the base station, and the base station instructs the terminal to send the SRS when determining that uplink channel estimation is required.

相应地，终端根据基站的配置自适应调整传输模式，采用基于码本的波束赋形，并按照指示消息加大SRS发送周期或者等待基站的信令到达时发送SRS。这样，相比于原来终端以较短周期发送较多的SRS，可以减少SRS的发送次数，减少SRS对上行无线资源的消耗。Correspondingly, the terminal adaptively adjusts the transmission mode according to the configuration of the base station, adopts codebook-based beamforming, and increases the SRS transmission cycle according to the instruction message or sends SRS when waiting for the signaling from the base station to arrive. In this way, compared with the original terminal sending more SRSs in a shorter period, the number of times SRSs are sent can be reduced, and the consumption of uplink radio resources by SRSs can be reduced.

本发明实施例提供的一种基站设备如图2所示，包括：A base station device provided by an embodiment of the present invention is shown in Figure 2, including:

参数确定单元201，用于确定终端的信道状态信息；A parameter determining unit 201, configured to determine channel state information of the terminal;

方式确定单元202，用于根据所述信道状态信息确定与所述终端传输数据所采用的波束赋形方式；A method determining unit 202, configured to determine the beamforming method used for data transmission with the terminal according to the channel state information;

指示单元203，用于当确定出所述波束赋形方式是基于码本的波束赋形时，向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期，或指示所述终端仅当接收到所述基站的信令时发送SRS。An instructing unit 203, configured to send an indication message to the terminal when it is determined that the beamforming method is codebook-based beamforming, to instruct the terminal to increase the SRS transmission period, or to instruct the terminal The SRS is sent only when the signaling of the base station is received.

所述参数确定单元201确定的信道状态信息，包括以下参数中的至少一种：The channel state information determined by the parameter determining unit 201 includes at least one of the following parameters:

RSRP，CQI和MCS；RSRP, CQI and MCS;

所述参数确定单元具体用于：The parameter determination unit is specifically used for:

接收所述终端上报的RSRP；receiving the RSRP reported by the terminal;

接收所述终端上报的CQI；receiving the CQI reported by the terminal;

查询本地记录确定所述终端对应的MCS。Query the local record to determine the MCS corresponding to the terminal.

所述方式确定单元202确定以下条件中的至少一种被满足时，确定所述波束赋形方式是基于码本的波束赋形：When the method determining unit 202 determines that at least one of the following conditions is met, determine that the beamforming method is codebook-based beamforming:

所述RSRP大于第一预设值；The RSRP is greater than a first preset value;

所述CQI的索引值大于第二预设值；The index value of the CQI is greater than a second preset value;

所述MCS的索引值大于第三预设值。The index value of the MCS is greater than a third preset value.

所述指示单元203用于向所述终端发送指示消息，用以指示所述终端增加SRS的发送周期时，具体包括：The indication unit 203 is configured to send an indication message to the terminal to instruct the terminal to increase the sending period of the SRS, specifically including:

向所述终端发送指示消息，指示所述终端以指定发送周期发送SRS，所述指定发送周期大于所述终端发送SRS的预设发送周期。Sending an indication message to the terminal, instructing the terminal to send the SRS with a specified sending period, where the specified sending period is greater than a preset sending period for the terminal to send the SRS.

所述方式确定单元202具体用于：The mode determining unit 202 is specifically used for:

根据预设周期内的全部信道状态信息确定信道状态信息中间值；Determine the intermediate value of the channel state information according to all the channel state information in the preset period;

根据所述信道状态信息中间值确定与所述终端传输数据所采用的波束赋形方式；或者，Determine the beamforming method adopted for transmitting data with the terminal according to the intermediate value of the channel state information; or,

根据最近一次确定的信道状态信息确定与所述终端传输数据所采用的波束赋形方式。Determine the beamforming mode adopted for data transmission with the terminal according to the latest determined channel state information.

综上所述，本发明实施例提供了一种控制SRS的发送的方法及基站设备，当基站确定采用基于码本的波束赋形方式时，减少SRS对上行资源的占用，提高上行吞吐量。To sum up, the embodiments of the present invention provide a method for controlling SRS transmission and base station equipment. When the base station determines to adopt the codebook-based beamforming mode, the occupation of uplink resources by SRS is reduced and uplink throughput is improved.

本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质（包括但不限于磁盘存储器和光学存储器等）上实施的计算机程序产品的形式。Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

本发明是参照根据本发明实施例的方法、设备（系统）、和计算机程序产品的流程图和／或方框图来描述的。应理解可由计算机程序指令实现流程图和／或方框图中的每一流程和／或方框、以及流程图和／或方框图中的流程和／或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和／或方框图一个方框或多个方框中指定的功能的装置。The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和／或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和／或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.