WO2014101871A1 - 信道探测方法、通信方法、终端及系统 - Google Patents

信道探测方法、通信方法、终端及系统 Download PDF

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Publication number
WO2014101871A1
WO2014101871A1 PCT/CN2013/090911 CN2013090911W WO2014101871A1 WO 2014101871 A1 WO2014101871 A1 WO 2014101871A1 CN 2013090911 W CN2013090911 W CN 2013090911W WO 2014101871 A1 WO2014101871 A1 WO 2014101871A1
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Prior art keywords
terminal
communication
srs
channel
srs signal
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PCT/CN2013/090911
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English (en)
French (fr)
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周晗
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华为技术有限公司
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Publication of WO2014101871A1 publication Critical patent/WO2014101871A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/006Quality of the received signal, e.g. BER, SNR, water filling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention relates to the field of communications, and in particular, to a channel detection method, a communication method, a terminal, and a system.
  • BACKGROUND OF THE INVENTION In recent years, wireless communication networks have become more and more occupied by people with great flexibility, and become an indispensable part of people's lives, such as direct communication between terminals and terminals (Device to Device, referred to as D2D communication). . D2D communication enables data packets to be transmitted directly through the terminal without any intermediate infrastructure.
  • the paging message is sent directly from the paging terminal to the paged terminal without the help of the base station and the core network.
  • This communication method can give Wireless communication brings huge benefits.
  • the prior art performs channel sounding in D2D communication, and specifically designs a reference signal for D2D communication, and performs channel sounding through the reference signal to measure channel state information, including channel energy, between the D2D terminal and other D2D terminals. Channel quality, channel response, etc., and then based on channel state information for communication peer selection, cooperative user selection, power control, modulation and coding mode selection, etc., to achieve D2D communication.
  • the prior art adds channel information by adding a new reference signal, which not only increases the complexity of the UE (User Equipment) and Cost, but also not conducive to the realization of D2D communication and cellular communication compatibility and unified scheduling. Summary of the invention
  • a channel detecting method comprising: direct communication between a terminal and a terminal, the first terminal of the D2D communication, initiates a sounding reference signal SRS measurement request to the base station, and the SRS measurement The identifier of the second terminal carrying the D2D communication in the request; Receiving a notification message sent by the base station in response to the measurement request, the notification message carrying parameter information of an SRS signal sent by the second terminal; measuring the SRS signal according to the parameter information, obtaining the first Channel state information of a channel between the terminal and the second terminal.
  • the channel information includes at least one of SRS signal strength, channel quality, and channel response.
  • a method for performing communication according to the above channel detecting method comprising: direct communication between a terminal and a terminal, a first terminal of D2D communication, and a base station initiating a sounding reference signal SRS measurement request, the SRS Receiving, by the base station, the identifier of the second terminal that carries the D2D communication; receiving the notification message sent by the base station in response to the measurement request, where the notification message carries parameter information of the SRS signal sent by the second terminal;
  • the parameter information measures the SRS signal, and obtains channel state information of a channel between the first terminal and the second terminal; when the channel state information meets a preset condition, the first terminal and the second The terminal communicates.
  • the channel state information includes at least one of an SRS signal strength, a channel quality, and a channel response.
  • the method further includes: determining the SRS Whether the signal strength is greater than a preset signal strength value, and/or whether the channel quality is greater than a preset channel quality value, and/or whether the channel response is greater than a preset channel response value; when the SRS signal If the strength is greater than a preset signal strength value, and/or, the channel quality is greater than a preset channel quality value, and/or, when the channel response is greater than a preset channel response value, determining that the channel state information is satisfied Preset conditions.
  • the method further includes: the first terminal receiving the first notification message sent by the second terminal, where the first notification message carries The second terminal has the information of the cooperative communication capability; the first terminal communicating with the second terminal specifically includes: the first terminal notifying the second terminal to perform cooperative communication, and starting with the second terminal Cooperative communication.
  • a channel detection method includes: receiving a sounding reference signal SRS measurement request initiated by a first terminal of direct communication D2D communication between a terminal and a terminal, where the SRS measurement request carries D2D communication And identifying, by the identifier of the second terminal, parameter information of the SRS signal sent by the second terminal, and sending, by the first terminal, a notification message for measuring the SRS signal, where The notification message carries parameter information of the SRS signal sent by the second terminal.
  • the obtaining the parameter information of the SRS signal sent by the second terminal according to the identifier of the second terminal including: assigning an SRS signal to the second terminal according to the identifier of the second terminal, indicating the The second terminal sends the SRS signal; and acquires parameter information of the SRS signal sent by the second terminal.
  • the channel state information includes at least one of SRS signal strength, channel quality, and channel response.
  • a D2D-based communication terminal includes: a sending module, configured to initiate a sounding reference signal SRS measurement request to the base station, where the SRS measurement request carries an identifier of another terminal of the D2D communication a receiving module, configured to receive a notification message sent by the base station in response to the measurement request, where the notification message carries parameter information of an SRS signal sent by the another terminal, and a measurement module, configured to receive according to the receiving module
  • the parameter information is used to measure the SRS signal to obtain channel state information of a channel between the communication terminal and the another terminal; and a communication module, configured to: when the channel state information meets a preset condition, the communication terminal Communicating with the other terminal.
  • the communication module includes a determining unit and a communication unit, and the determining unit is configured to determine whether the SRS signal strength is greater than a preset signal strength value, and/or, Whether the channel quality is greater than a preset channel quality value, and/or whether the channel response is greater than a preset channel response value; and the communication unit is configured to: when the SRS signal strength is greater than a preset signal strength value And/or, the channel quality is greater than a preset channel quality value, and/or, when the channel response is greater than a preset channel response value, the first terminal communicates with the other terminal.
  • the communication terminal is further configured to receive a first notification message sent by the another terminal, where the first notification message carries information that the another terminal has cooperative communication capability; correspondingly, the communication module includes determining a unit and a communication unit, configured to determine whether the SRS signal strength is greater than a preset signal strength value, and/or, whether the channel quality is greater than a preset channel quality value, and/or Whether the channel response is greater than a preset channel response value; the communication unit is configured to: when the SRS signal strength is greater than a preset signal strength value, and/or, the channel quality is greater than a preset channel quality value, and/or Or, when the channel response is greater than a preset channel response value, the first terminal notifies the another terminal to perform cooperative communication, and starts cooperative communication with the another terminal.
  • the channel state information includes at least one of SRS signal strength, channel quality, and channel response.
  • a communication system includes: the first terminal, configured to initiate a sounding reference signal SRS measurement request to the base station, where the SRS measurement request carries a second terminal of D2D communication Identifying, by the base station, a notification message that is sent by the base station in response to the measurement request, where the notification message carries parameter information of an SRS signal sent by the second terminal, and the SRS signal is measured according to the parameter information, and obtains Channel state information of a channel between the second terminals; when the channel state information meets a preset condition, communicating with the second terminal; and the base station is configured to receive an SRS measurement request initiated by the first terminal And acquiring the parameter information of the SRS signal sent by the second terminal according to the identifier of the second terminal, and sending, to the first terminal, a notification message for measuring the SRS signal, where the notification message carries the Parameter information of the SRS signal sent by the second terminal; the
  • a base station configured to include: a receiving module, configured to receive a sounding reference signal SRS measurement request initiated by a first terminal for direct communication D2D communication between the terminal and the terminal, where the SRS measurement request is An identifier of the second terminal that carries the D2D communication; an acquiring module, configured to acquire, according to the identifier of the second terminal, the parameter information of the SRS signal sent by the second terminal, and a sending module, configured to send The first terminal sends a notification message for measuring the SRS signal, where the notification message carries parameter information of the SRS signal sent by the second terminal.
  • the technical solution provided by the embodiment of the present invention has the beneficial effects of: performing channel detection by using an existing SRS signal in an LTE (Long Term Evolution) cellular system, which does not increase the complexity and cost of the UE, and can be very
  • the good implementation is compatible with the LTE cellular system, realizes the unified scheduling and communication of the D2D communication and the LTE cellular system, and improves the D2D communication quality.
  • BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.
  • FIG. 1 is a schematic diagram of LTE cellular communication and D2D communication provided in the prior art
  • FIG. 2 is a flowchart of a channel detection method according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a communication method according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of a channel detecting method according to Embodiment 4 of the present invention
  • FIG. 6 is a schematic structural diagram of a communications terminal according to Embodiment 5 of the present invention
  • FIG. 8 is a schematic structural diagram of a base station according to Embodiment 7 of the present invention
  • an embodiment of the present invention provides a channel detection method, where the method includes:
  • the terminal Direct communication between the terminal and the terminal
  • the first terminal of the D2D communication initiates a sounding reference signal SRS measurement request to the base station, where the SRS measurement request carries the identifier of the second terminal of the D2D communication;
  • the receiving base station sends in response to the measurement request a notification message, where the notification message carries parameter information of the SRS signal sent by the second terminal;
  • the 103 Measure the SRS signal according to the parameter information, and obtain channel state information of a channel between the first terminal and the second terminal.
  • the channel state information includes at least one of SRS signal strength, channel quality, and channel response.
  • the method provided by the embodiment of the present invention performs channel sounding by using the existing SRS signal in the LTE cellular system, does not increase the complexity and cost of the UE, and can well realize compatibility with the LTE cellular system, and implements D2D communication and The unified scheduling and communication of the LTE cellular system further improves the quality of D2D communication.
  • Embodiment 2 Referring to FIG.
  • each D2D UE obtains channel state information between two UEs by measuring SRSs sent by other D2D UEs, and then determines D2D communication parameters according to channel state information.
  • the communication method includes: 201: D2D UE1 and D2DJJE2 are required to perform D2D communication or perform D2D communication. Channel detection is required.
  • the first communication terminal D2D_UE1 and the second communication terminal D2D_UE2 in the embodiment of the present invention are in a D2D communication system, and two communication terminals are provided.
  • the communication status may be ready for D2D communication, determining whether to perform communication by channel sounding, selecting communication resources, resource optimization allocation, power allocation, adaptive code modulation, etc.; or performing D2D communication, selecting communication by channel sounding Resources, resource optimization allocation, power allocation, adaptive code modulation and other functions.
  • the D2D UE1 initiates an SRS measurement request to the base station eNB, where the initiated SRS measurement request is used to notify the base station to measure the SRS signal of the D2D_UE2.
  • the SRS measurement request carries the terminal identifier of the D2D_UE2, so that the base station acquires the parameter information of the SRS signal sent by the D2D_UE2 according to the terminal identifier of the D2D_UE2.
  • the base station instructs the D2DJJE2 to send the SRS signal. Specifically, after receiving the measurement request sent by the D2D_UE1, the base station, according to the terminal identifier carried in the measurement request, indicates that the terminal corresponding to the terminal identifier sends the SRS signal. In practical applications, this step is optional.
  • the base station receives the SRS measurement request initiated by the D2D_UE1, the D2D_UE2 may already send the SRS signal. In this case, the base station does not have to indicate the new SRS transmission, but only the SRS signal of the D2D UE2.
  • the parameter information tells D2DJJE1.
  • D2DJJE2 sends an SRS signal according to the indication of the base station; wherein, after receiving the indication sent by the base station, the D2DJJE2 sends an SRS signal to the D2DJJE1, where the SRS signal is a sounding reference signal in the LTE cellular system, and is used by the eNB in the LTE system.
  • the uplink channel detection enables the eNB to determine the uplink channel state information, so as to implement resource optimization scheduling, selecting communication resources, resource optimization allocation, power control, adaptive coding and modulation, and the like.
  • the base station notifies the D2DJJE1 to measure the SRS signal sent by the D2DJJE2. Specifically, the base station obtains the parameter information of the SRS signal sent by the D2D_UE2, and sends a notification message to the D2D_UE1, where the notification message carries the parameter information of the SRS signal sent by the D2D_UE2, and the parameter information It can be a time-frequency resource of the SRS signal, an SRS sequence pattern, and the like.
  • the D2D UE1 receives the SRS signal sent by the D2DJJE2, and measures the SRS signal according to the notification message sent by the base station to obtain channel state information.
  • the channel state information specifically includes at least one of SRS signal strength, channel quality, and channel response.
  • the D2D UE1 accurately measures the SRS signal according to the parameter information, obtains channel state information of the channel between the D2DJJE1 and the D2DJJE2, and improves the accuracy of measuring the channel state information.
  • the D2D UE1 determines whether to communicate with the D2DJJE2 according to the channel state information. For this step, D2D_UE1 determines whether the acquired channel state information satisfies a preset condition, and when it is determined that the preset condition is met, it determines that communication with D2D_UE2 is performed.
  • the obtained channel state information specifically includes at least one of an SRS signal strength, a channel quality, and a channel response
  • the D2D_UE1 determines whether the acquired channel state information satisfies a preset condition, specifically, determining whether the acquired SRS signal strength is greater than The preset signal strength value, and/or, whether the obtained channel quality is greater than a preset channel quality value, and/or, whether the obtained channel response is greater than a preset channel response value, when the acquired SRS signal strength is greater than a preset
  • the signal strength value, and/or, the obtained channel quality is greater than the preset channel quality value, and/or, when the obtained channel response is greater than the preset channel response value, it is determined that the preset condition is met, and the D2D_UE2 is determined and performed.
  • the method provided by the embodiment of the present invention performs channel sounding by using the existing SRS signal in the LTE cellular system, does not increase the complexity and cost of the UE, and can well realize compatibility with the LTE cellular system, and implements D2D communication and The unified scheduling and communication of the LTE cellular system improves the quality of D2D communication.
  • Embodiment 3 Referring to FIG.
  • an embodiment of the present invention details a method for determining a D2D UE for cooperative communication according to channel state information by measuring SRS sent by other D2D UEs, obtaining measurement channel information between two UEs, and then determining channel information according to channel state information.
  • the communication method includes: 301: each D2D_UE2 having cooperative communication capability notifies the surrounding D2D_UE1 that it has this capability; for this step, D2D_UE1 receives a first notification message sent by D2D_UE2, the first notification message carrying D2D_UE2 having cooperative communication Information about capabilities.
  • the D2D UE1 initiates an SRS measurement request to the base station; where, the D2DJJE1 learns that the D2DJJE2 has a cooperative communication capability, and if it wants to cooperate with the D2DJJE2, initiates an SRS measurement request to the base station.
  • the SRS measurement request carries the terminal identifier of the D2DJJE2, so that the base station acquires the parameter information of the SRS signal sent by the D2D_UE2 according to the terminal identifier of the D2D_UE2, and the parameter information may be a time-frequency resource of the SRS signal, an SRS sequence pattern, or the like.
  • the base station instructs the D2DJJE2 to send the SRS signal according to the measurement request of the D2DJJE1. Specifically, after receiving the measurement request sent by the D2D_UE1, the base station, according to the terminal identifier carried in the measurement request, indicates that the terminal corresponding to the terminal identifier sends the SRS signal. In practical applications, this step is optional. When the base station receives the SRS measurement request initiated by the D2D_UE1, the D2D_UE2 may already send the SRS signal. In this case, the base station does not have to indicate the new SRS transmission, but only the SRS signal parameter of the D2D UE2. The message tells D2DJJE1.
  • D2DJJE2 sends an SRS signal according to the indication of the base station; wherein, after receiving the indication sent by the base station, the D2DJJE2 sends an SRS signal to the D2DJJE1, where the SRS signal is a sounding reference signal in the LTE cellular system, and is used for the e B in the LTE system.
  • the uplink channel detection is performed, so that e B can determine the uplink channel state information, so as to implement resource optimization scheduling, selecting communication resources, resource optimization allocation, power control, adaptive coding and modulation, and the like.
  • the base station notifies the D2DJJE1 to measure the SRS signal sent by the D2DJJE2. Specifically, the base station obtains the parameter information of the SRS signal sent by the D2D_UE2, and sends a notification message to the D2D_UE1, where the notification message carries the parameter information of the SRS signal sent by the D2D_UE2, and the parameter information It can be a time-frequency resource of the SRS signal, an SRS sequence pattern, and the like.
  • the D2D UE1 receives the SRS signal sent by the D2DJJE2, and measures the SRS signal according to the notification message sent by the base station to obtain channel state information.
  • the channel state information specifically includes at least one of SRS signal strength, channel quality, and channel response.
  • the D2D UE1 accurately measures the SRS signal according to the parameter information, and obtains D2DJJE1 and D2DJJE2.
  • the channel state information of the channel between the channels improves the accuracy of measuring channel state information.
  • D2D_UE1 determines whether to perform cooperative communication with D2D_UE2 according to channel state information. For this step, the D2D_UE1 determines whether the acquired channel state information satisfies the preset condition, and when it is determined that the preset condition is met, the D2D_UE2 is notified to perform cooperative communication.
  • the obtained channel state information specifically includes at least one of an SRS signal strength, a channel quality, and a channel response
  • the D2D_UE1 determines whether the acquired channel state information satisfies a preset condition, specifically, determining whether the acquired SRS signal strength is greater than The preset signal strength value, and/or, whether the obtained channel quality is greater than a preset channel quality value, and/or, whether the obtained channel response is greater than a preset channel response value, when the acquired SRS signal strength is greater than a preset
  • the signal strength value, and/or, the obtained channel quality is greater than the preset channel quality value, and/or, when the obtained channel response is greater than the preset channel response value, it is determined that the preset condition is met, and the D2D_UE2 is notified to cooperate.
  • an embodiment of the present invention provides a channel detection method, where the method includes:
  • 402 Acquire, according to the identifier of the second terminal, parameter information of the SRS signal sent by the second terminal.
  • 403 Send a notification message for measuring the SRS signal to the first terminal, where the notification message carries the SRS sent by the second terminal.
  • the channel state information includes at least one of SRS signal strength, channel quality, and channel response.
  • the method provided by the embodiment of the present invention can perform channel detection by using the existing SRS signal in the LTE cellular system, does not increase the complexity and cost of the UE, and can well implement compatibility with the LTE cellular system, and further implements D2D communication. Uniform scheduling and communication with the LTE cellular system improves the quality of D2D communication.
  • Embodiment 5 Referring to FIG.
  • an embodiment of the present invention provides a D2D-based communication terminal, where the communication terminal includes: a sending module 501, configured to initiate an SRS measurement request to a base station, where the SRS measurement request carries another D2D communication.
  • the receiving module 502 is configured to receive a notification message sent by the base station in response to the measurement request, where the notification message carries parameter information of the SRS signal sent by the other terminal, and the measurement module 503 is configured to receive according to the receiving module 502.
  • the parameter information measures the SRS signal to obtain channel state information of a channel between the communication terminal and another terminal; and the communication module 504 is configured to: when the channel state information satisfies a preset condition, the communication terminal communicates with another terminal.
  • the communication terminal and the other terminal are ready for D2D communication, or D2D communication is in progress and channel detection is required.
  • the communication module 504 includes a determining unit and a communication unit.
  • the determining unit is configured to determine whether the SRS signal strength is greater than a preset signal strength value, and/or, whether the channel quality is greater than a preset channel quality value, and/or, Whether the channel response is greater than a preset channel response value; the communication unit is configured to: when the SRS signal strength is greater than a preset signal strength value, and/or, the channel quality is greater than a preset channel quality value, and/or, the channel response is greater than a pre- When the channel response value is set, the first terminal communicates with another terminal.
  • the communication terminal is further configured to receive a first notification message sent by another terminal, where the first notification message carries information that another terminal has cooperative communication capability;
  • the communication module 504 includes a determining unit and a communication unit; The method is used to determine whether the SRS signal strength is greater than a preset signal strength value, and/or, whether the channel quality is greater than a preset channel quality value, and/or whether the channel response is greater than a preset channel response value;
  • the first terminal notifies the other terminal to enter Cooperate with the communication and start cooperative communication with another terminal.
  • the channel state information includes at least one of SRS signal strength, channel quality, and channel response.
  • the terminal provided by the embodiment of the present invention can perform channel detection by using the existing SRS signal in the LTE cellular system, which does not increase the complexity and cost of the UE, can be compatible with the LTE cellular system, and implements D2D communication and The unified scheduling and cooperative communication of the LTE cellular system improves the quality of D2D communication.
  • Embodiment 6 Referring to FIG.
  • an embodiment of the present invention provides a communication system, where the system includes: a first terminal 601 based on D2D communication, a base station 602, and a second terminal 603 based on D2D communication;
  • the SRS measurement request is sent to the base station 602, where the SRS measurement request carries the identifier of the second terminal of the D2D communication, and the notification message sent by the base station in response to the measurement request, where the notification message carries the SRS signal sent by the second terminal.
  • the parameter information, the SRS signal is measured according to the parameter information, and the channel state information of the channel with the second terminal is obtained; when the channel state information meets the preset condition, the second terminal is communicated; the base station 602 is configured to receive the first terminal.
  • the SRS measurement request initiated by the 601 the parameter information of the SRS signal sent by the second terminal is obtained according to the identifier of the second terminal, and the notification message for measuring the SRS signal is sent to the first terminal, where the notification message carries the second terminal Parameter information of the SRS signal; the second terminal 603 is configured to send the SRS signal.
  • the first terminal may be any communication terminal described in Embodiment 5, and the present invention does not limit the first terminal.
  • the system provided by the embodiment of the present invention performs channel exploration by using an existing SRS signal in an LTE cellular system.
  • the measurement does not increase the complexity and cost of the UE, and can be compatible with the LTE cellular system, realizes unified scheduling and cooperative communication of the D2D communication and the LTE cellular system, and improves the D2D communication quality.
  • Embodiment 7 Referring to FIG.
  • an embodiment of the present invention provides a base station, where the base station includes: a receiving module 701, configured to receive an SRS measurement request initiated by a first terminal of D2D communication, where the SRS measurement request carries D2D communication
  • the obtaining module 702 is configured to obtain, according to the identifier of the second terminal, the receiving, by the receiving module 701, the parameter information of the SRS signal sent by the second terminal, and the sending module 703, configured to send, to the first terminal, the method for measuring The notification message of the SRS signal, where the notification message carries parameter information of the SRS signal sent by the second terminal.
  • the base station provided by the embodiment of the present invention performs channel detection by using the existing SRS signal in the LTE cellular system, does not increase the complexity and cost of the UE, and can well realize compatibility with the LTE cellular system, and implements D2D communication and
  • the unified scheduling and cooperative communication of the LTE cellular system improves the quality of D2D communication.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

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Abstract

本发明公开了一种信道探测方法、通信方法、终端及系统,属于通信领域。所述信道探测方法包括:D2D通信的第一终端向基站发起SRS测量请求,该SRS测量请求中携带D2D通信的第二终端的标识;接收基站发送的通知消息,该通知消息中携带第二终端发送的SRS信号的参数信息;根据参数信息测量SRS信号,获得第一终端与第二终端之间信道的信道状态信息。所述通信终端包括发送模块、接收模块、测量模块和通信模块。本发明采用LTE蜂窝系统中的SRS信号进行信道探测,不会增加UE的复杂度和成本,能够很好的实现与LTE蜂窝系统的兼容,实现了D2D通信与LTE蜂窝系统的统一调度与通信。

Description

信道探测方法、 通信方法、 终端及系统
本申请要求于 2012年 12月 28日提交中国专利局、 申请号为 CN 201210585503.0、 发明名称为 "信道探测方法、 通信方法、 终端及系统"的中国专利申请的优先权, 其全 部内容通过引用结合在本申请中。 技术领域 本发明涉及通信领域, 特别涉及一种信道探测方法、 通信方法、 终端及系统。 背景技术 近年来, 无线通信网络以其巨大的灵活性越来越占据着人们的生活, 成为人们生活 中不可缺少的一部分, 如终端与终端之间的直接通信 (Device to Device, 简称 D2D通 信)。 D2D通信能使数据包直接通过终端传输而不需要任何中间的基础设施, 寻呼消息 从寻呼终端直接发送给被寻呼终端, 而不需要基站及核心网的帮助, 这种通信方式能给 无线通信带来巨大的利益。 现有技术在 D2D通信时进行信道探测, 通过为 D2D通信专门设计一种参考信号, 并 通过该参考信号进行信道探测, 测量出 D2D终端与其它 D2D终端之间的信道状态信息, 包括信道能量, 信道质量以及信道响应等, 进而根据信道状态信息进行通信对端选择, 合作用户选择, 功率控制, 调制编码方式选择等, 实现 D2D通信。 在实现本发明的过程中, 发明人发现现有技术至少存在以下问题: 现有技术通过增加一种新的参考信号来进行信道探测, 不仅增加了 UE ( User Equipment, 用户设备) 的复杂度和成本, 而且也不利于 D2D通信与蜂窝通信兼容与统 一调度的实现。 发明内容
为了降低 UE的复杂度和成本, 并提高通信性能, 本发明实施例提供了一种信道探 测方法、 通信方法、 终端及系统。 所述技术方案如下: 一方面, 提供了一种信道探测方法, 所述方法包括: 终端与终端之间的直接通信 D2D通信的第一终端向基站发起探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 接收所述基站响应于所述测量请求发送的通知消息,所述通知消息中携带所述第二 终端发送的 SRS信号的参数信息; 根据所述参数信息测量所述 SRS信号,获得所述第一终端与所述第二终端之间信道 的信道状态信息。 其中, 所述信道信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。 另一方面, 提供了一种根据上述信道探测方法进行通信的方法, 所述方法包括: 终端与终端之间的直接通信 D2D通信的第一终端向基站发起探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 接收所述基站响应于所述测量请求发送的通知消息,所述通知消息中携带所述第二 终端发送的 SRS信号的参数信息; 根据所述参数信息测量所述 SRS信号,获得所述第一终端与所述第二终端之间信道 的信道状态信息; 当所述信道状态信息满足预设条件时, 所述第一终端与所述第二终端进行通信。 其中,所述信道状态信息包括 SRS信号强度、信道质量和信道响应三者中的至少一 者, 所述第一终端与所述第二终端进行通信之前, 所述方法还包括: 判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大 于预设的信道质量值, 和 /或, 所述信道响应是否大于预设的信道响应值; 当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信道质量大于预设的信 道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 判断出所述信道状态信息满 足预设条件。 其中,所述 D2D通信的第一终端向基站发起 SRS测量请求之前,所述方法还包括: 所述第一终端接收所述第二终端发送的第一通知消息,所述第一通知消息携带所述 第二终端具有合作通信能力的信息; 所述第一终端与所述第二终端进行通信具体包括: 所述第一终端通知所述第二终端 进行合作通信, 并开始与所述第二终端进行合作通信。 又一方面, 提供了一种信道探测方法, 所述方法包括: 接收终端与终端之间的直接通信 D2D通信的第一终端发起的探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 根据所述第二终端的标识, 获取所述第二终端发送的 SRS信号的参数信息; 向所述第一终端发送用于测量所述 SRS信号的通知消息,所述通知消息中携带所述 第二终端发送的 SRS信号的参数信息。 其中,所述根据所述第二终端的标识,获取所述第二终端发送的 SRS信号的参数信 息, 包括: 根据所述第二终端的标识为所述第二终端分配 SRS 信号, 指示所述第二终端发送 SRS信号; 获取所述第二终端发送的 SRS信号的参数信息。 其中,所述信道状态信息包括 SRS信号强度、信道质量和信道响应三者中的至少一 者。 又一方面, 提供了一种基于 D2D的通信终端, 所述通信终端包括: 发送模块, 用于向基站发起探测参考信号 SRS测量请求, 所述 SRS测量请求中携 带 D2D通信的另一终端的标识; 接收模块, 用于接收基站响应于所述测量请求发送的通知消息, 所述通知消息中携 带所述另一终端发送的 SRS信号的参数信息; 测量模块,用于根据所述接收模块接收的所述参数信息测量所述 SRS信号,获得所 述通信终端与所述另一终端之间信道的信道状态信息; 通信模块, 用于当所述信道状态信息满足预设条件时, 所述通信终端与所述另一终 端进行通信。 其中, 所述通信模块包括判断单元和通信单元; 所述判断单元, 用于判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大于预设的信道质量值,和 /或,所述信道响应是否大于预设的信道响 应值; 所述通信单元, 用于当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信 道质量大于预设的信道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 所述第 —终端与所述另一终端进行通信。 其中, 所述通信终端还用于接收所述另一终端发送的第一通知消息, 所述第一通知 消息携带所述另一终端具有合作通信能力的信息; 相应地, 所述通信模块包括判断单元和通信单元; 所述判断单元, 用于判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大于预设的信道质量值,和 /或,所述信道响应是否大于预设的信道响 应值; 所述通信单元, 用于当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信 道质量大于预设的信道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 所述第 一终端通知所述另一终端进行合作通信, 并开始与所述另一终端进行合作通信。 其中,所述信道状态信息包括 SRS信号强度、信道质量和信道响应三者中的至少一 者。 又一方面, 提供了一种通信系统, 所述系统包括: 所述第一终端, 用于向所述基站发起探测参考信号 SRS测量请求, 所述 SRS测量 请求中携带 D2D通信的第二终端的标识, 接收所述基站响应于所述测量请求发送的通 知消息,所述通知消息中携带所述第二终端发送的 SRS信号的参数信息,根据所述参数 信息测量所述 SRS信号,获得与所述第二终端之间信道的信道状态信息; 当所述信道状 态信息满足预设条件时, 与所述第二终端进行通信; 所述基站,用于接收所述第一终端发起的 SRS测量请求,根据所述第二终端的标识 获取所述第二终端发送的 SRS 信号的参数信息, 并向所述第一终端发送用于测量所述 SRS信号的通知消息, 所述通知消息中携带所述第二终端发送的 SRS信号的参数信息; 所述第二终端, 用于发送 SRS信号。 又一方面, 提供了一种基站, 所述基站包括: 接收模块, 用于接收终端与终端之间的直接通信 D2D通信的第一终端发起的探测 参考信号 SRS测量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 获取模块, 用于根据所述接收模块接收的所述第二终端的标识, 获取所述第二终端 发送的 SRS信号的参数信息; 发送模块,用于向所述第一终端发送用于测量所述 SRS信号的通知消息,所述通知 消息中携带所述第二终端发送的 SRS信号的参数信息。 本发明实施例提供的技术方案带来的有益效果是: 通过采用 LTE (Long Term Evolution, 长期演进) 蜂窝系统中已有的 SRS信号进行 信道探测, 不会增加 UE的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现 了 D2D通信与 LTE蜂窝系统的统一调度与通信, 提高了 D2D通信质量。 附图说明 为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中所需要使用 的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对 于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得 其他的附图。 图 1是现有技术中提供的 LTE蜂窝通信与 D2D通信示意图; 图 2是本发明实施例 1提供的信道探测方法流程图; 图 3是本发明实施例 2提供的通信方法流程图; 图 4是本发明实施例 3提供的通信方法流程图; 图 5是本发明实施例 4提供的信道探测方法流程图; 图 6是本发明实施例 5提供的通信终端结构示意图; 图 7是本发明实施例 6提供的通信系统结构示意图; 图 8是本发明实施例 7提供的基站结构示意图。 具体实施方式 为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本发明实施方式 作进一步地详细描述。 参见图 1所示的 LTE蜂窝通信与 D2D通信示意图, LTE蜂窝网系统中, 两个终端 通信时需要经过基站转发, 同一个数据包从终端到基站, 再从基站到终端, 占用空口资 源两次。 如果两个通信终端距离较远, 无法到达对方, 则这种方案比较可行; 但如果通 信双方距离较近, 相互在对方的通信范围内, 则数据包直接通过终端进行传输, 不需要 经过基站转发,可以节省一半的资源。 D2D通信中的数据包直接通过终端传输而不需要 任何中间的基础设施, 寻呼消息从寻呼终端直接发送给被寻呼终端, 而不需要基站及核 心网的帮助, 这种通信方式能给蜂窝网通信带来巨大的利益。 实施例 1 参见图 2, 本发明实施例提供了一种信道探测方法, 该方法包括:
101: 终端与终端之间的直接通信 D2D 通信的第一终端向基站发起探测参考信号 SRS测量请求, 该 SRS测量请求中携带 D2D通信的第二终端的标识; 102: 接收基站响应于测量请求发送的通知消息, 该通知消息中携带第二终端发送 的 SRS信号的参数信息;
103: 根据参数信息测量 SRS信号, 获得第一终端与第二终端之间信道的信道状态 信息。 其中, 信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。 本发明实施例提供的方法, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与通信, 进一步提高 D2D通信质量。 实施例 2 参见图 3, 本实施例详细说明了每个 D2D UE通过测量其它 D2D UE发送的 SRS, 获得两个 UE间的信道状态信息,然后根据信道状态信息确定 D2D通信参数的方法和步 骤, 该通信方法包括: 201: D2D UE1和 D2DJJE2准备进行 D2D通信或正在进行 D2D通信需要进行信 道探测; 具体地, 本发明实施例中的第一通信终端 D2D_UE1和第二通信终端 D2D_UE2处 于 D2D通信系统中, 两个通信终端的通信状态可以为准备进行 D2D通信, 通过信道探 测确定是否要进行通信, 选择通信资源, 资源优化分配, 功率分配, 自适应编码调制等 功能; 也可以为正在进行 D2D通信, 通过信道探测选择通信资源, 资源优化分配, 功 率分配, 自适应编码调制等功能。
202: D2D UE1向基站 eNB发起 SRS测量请求; 其中, 该发起的 SRS测量请求, 用于通知基站欲测量 D2D_UE2的 SRS信号。 具 体地, 该 SRS测量请求中携带 D2D_UE2的终端标识, 以使基站根据该 D2D_UE2的终 端标识获取 D2D_UE2发送的 SRS信号的参数信息。
203: 基站根据 D2DJJE1的测量请求, 指示 D2DJJE2发送 SRS信号; 具体地, 基站接收到 D2D_UE1发送的测量请求后, 根据测量请求中携带的终端标 识, 指示该终端标识对应的终端发送 SRS信号。 实际应用中,该步骤为可选操作,当基站接收到 D2D_UE1发起的 SRS测量请求时, 可能 D2D_UE2 已经在发送 SRS 信号了, 此时基站不必指示新的 SRS 发送, 只是将 D2D UE2的 SRS信号的参数信息告诉 D2DJJE1。
204: D2DJJE2根据基站的指示发送 SRS信号; 其中, D2DJJE2接收到基站发送的指示后, 向 D2DJJE1发送 SRS信号, 该 SRS 信号是 LTE蜂窝系统中的探测参考信号,其在 LTE系统中用于 eNB进行上行信道探测, 使 eNB 能够确定上行信道状态信息, 以便实现资源优化调度, 选择通信资源, 资源优 化分配, 功率控制, 自适应编码调制等功能。
205: 基站通知 D2DJJE1测量 D2DJJE2发送的 SRS信号; 具体地, 基站获得 D2D_UE2发送的 SRS信号的参数信息, 并向 D2D_UE1发送通 知消息, 该通知消息中携带 D2D_UE2发送的 SRS信号的参数信息, 该参数信息可以为 SRS信号的时频资源, SRS序列样式等。 206: D2D UE1接收 D2DJJE2发送的 SRS信号, 并根据基站发送的通知消息测量 该 SRS信号, 获得信道状态信息; 其中,信道状态信息具体包括 SRS信号强度、信道质量和信道响应三者中的至少一 者。 具体地, 由于通知消息中携带了 D2D_UE2 发送的 SRS 信号的参数信息, 因而
D2D UE1根据该参数信息对该 SRS信号进行准确测量, 获得 D2DJJE1与 D2DJJE2 之间信道的信道状态信息, 提高了测量信道状态信息的准确率。
207: D2D UE1根据信道状态信息确定是否与 D2DJJE2进行通信。 对于该步骤, D2D_UE1 判断获取的信道状态信息是否满足预设条件, 当判断出满 足预设条件时, 则确定出与 D2D_UE2进行通信。 其中, 获取的信道状态信息具体包括 SRS信号强度、 信道质量和信道响应三者中的至少一者, D2D_UE1判断获取的信道状 态信息是否满足预设条件,具体为,判断获取的 SRS信号强度是否大于预设的信号强度 值, 和 /或, 获取的信道质量是否大于预设的信道质量值, 和 /或, 获取的信道响应是否 大于预设的信道响应值, 当获取的 SRS信号强度大于预设的信号强度值, 和 /或, 获取 的信道质量大于预设的信道质量值, 和 /或, 获取的信道响应大于预设的信道响应值时, 判断出满足预设条件, 确定出与进行 D2D_UE2通信, 并根据信道状态信息实现选择通 信资源, 资源优化分配, 功率控制, 自适应编码调制等功能。 本发明实施例提供的方法, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与通信, 提高了 D2D通信质量。 实施例 3 参见图 4, 本发明实施例详细说明了每个 D2D UE通过测量其它 D2D UE发送的 SRS,获得两个 UE间的测量信道信息,然后根据信道状态信息确定合作通信的 D2D UE 的方法和步骤, 该通信方法包括: 301 :每个具有合作通信能力的 D2D_UE2通知周围 D2D_UE1其具有此能力; 对于该步骤, D2D_UE1 接收 D2D_UE2发送的第一通知消息, 该第一通知消息携 带 D2D_UE2具有合作通信能力的信息。 302: D2D UEl向基站发起 SRS测量请求; 其中, D2DJJE1获知 D2DJJE2具有合作通信能力,欲与该 D2DJJE2寻求合作时, 向基站发起 SRS测量请求。 具体地, 该 SRS测量请求中携带 D2DJJE2的终端标识, 以使基站根据该 D2D_UE2的终端标识获取 D2D_UE2发送的 SRS信号的参数信息, 该 参数信息可以为 SRS信号的时频资源, SRS序列样式等。
303: 基站根据 D2DJJE1的测量请求, 指示 D2DJJE2发送 SRS信号; 具体地, 基站接收到 D2D_UE1发送的测量请求后, 根据测量请求中携带的终端标 识, 指示该终端标识对应的终端发送 SRS信号。 实际应用中,该步骤为可选操作,当基站接收到 D2D_UE1发起的 SRS测量请求时, 可能 D2D_UE2 已经在发送 SRS 信号了, 此时基站不必指示新的 SRS 发送, 只是将 D2D UE2的 SRS信号参数信息告诉 D2DJJE1。
304: D2DJJE2根据基站的指示发送 SRS信号; 其中, D2DJJE2接收到基站发送的指示后, 向 D2DJJE1发送 SRS信号, 该 SRS 信号是 LTE蜂窝系统中的探测参考信号,其在 LTE系统中用于 e B进行上行信道探测, 使 e B 能够确定上行信道状态信息, 以便实现资源优化调度, 选择通信资源, 资源优 化分配, 功率控制, 自适应编码调制等功能。
305: 基站通知 D2DJJE1测量 D2DJJE2发送的 SRS信号; 具体地, 基站获得 D2D_UE2发送的 SRS信号的参数信息, 并向 D2D_UE1发送通 知消息, 该通知消息中携带 D2D_UE2发送的 SRS信号的参数信息, 该参数信息可以为 SRS信号的时频资源, SRS序列样式等。
306: D2D UE1接收 D2DJJE2发送的 SRS信号, 并根据基站发送的通知消息测量 该 SRS信号, 获得信道状态信息; 其中,信道状态信息具体包括 SRS信号强度、信道质量和信道响应三者中的至少一 者。 具体地, 由于通知消息中携带了 D2D_UE2 发送的 SRS 信号的参数信息, 因而
D2D UE1根据该参数信息对该 SRS信号进行准确测量, 获得 D2DJJE1与 D2DJJE2 之间信道的信道状态信息, 提高了测量信道状态信息的准确率。
307: D2D_UE1根据信道状态信息确定是否与 D2D_UE2进行合作通信。 对于该步骤, D2D_UE1 判断获取的信道状态信息是否满足预设条件, 当判断出满 足预设条件时, 则通知 D2D_UE2进行合作通信。 其中, 获取的信道状态信息具体包括 SRS信号强度、 信道质量和信道响应三者中的至少一者, D2D_UE1判断获取的信道状 态信息是否满足预设条件,具体为,判断获取的 SRS信号强度是否大于预设的信号强度 值, 和 /或, 获取的信道质量是否大于预设的信道质量值, 和 /或, 获取的信道响应是否 大于预设的信道响应值, 当获取的 SRS信号强度大于预设的信号强度值, 和 /或, 获取 的信道质量大于预设的信道质量值, 和 /或, 获取的信道响应大于预设的信道响应值时, 判断出满足预设条件, 则通知 D2D_UE2进行合作通信, 并开始与第二终端进行合作通 信。 本发明实施例提供的方法, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与合作通信, 提高了 D2D通信质量。 实施例 4 参见图 5, 本发明实施例提供了一种信道探测方法, 所述方法包括:
401 :接收 D2D通信的第一终端发起的 SRS测量请求,该 SRS测量请求中携带 D2D 通信的第二终端的标识;
402: 根据第二终端的标识, 获取第二终端发送的 SRS信号的参数信息; 403: 向第一终端发送用于测量所述 SRS信号的通知消息, 该通知消息中携带第二 终端发送的 SRS信号的参数信息。 其中, 信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。 本发明实施例提供的方法, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 进一步实 现了 D2D通信与 LTE蜂窝系统的统一调度与通信, 提高了 D2D通信质量。 实施例 5 参见图 6, 本发明实施例提供了一种基于 D2D的通信终端, 所述通信终端包括: 发送模块 501, 用于向基站发起 SRS测量请求, 该 SRS测量请求中携带 D2D通信 的另一终端的标识; 接收模块 502, 用于接收基站响应于测量请求发送的通知消息, 该通知消息中携带 另一终端发送的 SRS信号的参数信息; 测量模块 503, 用于根据接收模块 502接收的参数信息测量 SRS信号, 获得通信终 端与另一终端之间信道的信道状态信息; 通信模块 504, 用于当该信道状态信息满足预设条件时, 通信终端与另一终端进行 通信。 其中, 该通信终端和另一终端准备进行 D2D通信, 或, 正在进行 D2D通信且需要 信道探测。 具体地, 通信模块 504包括判断单元和通信单元; 判断单元, 用于判断 SRS信号强度是否大于预设的信号强度值, 和 /或, 信道质量 是否大于预设的信道质量值, 和 /或, 信道响应是否大于预设的信道响应值; 通信单元, 用于当 SRS信号强度大于预设的信号强度值, 和 /或, 信道质量大于预 设的信道质量值, 和 /或, 信道响应大于预设的信道响应值时, 第一终端与另一终端进行 通信。 具体地, 通信终端还用于接收另一终端发送的第一通知消息, 第一通知消息携带另 一终端具有合作通信能力的信息; 相应地, 通信模块 504包括判断单元和通信单元; 判断单元, 用于判断 SRS信号强度是否大于预设的信号强度值, 和 /或, 信道质量 是否大于预设的信道质量值, 和 /或, 信道响应是否大于预设的信道响应值; 通信单元, 用于当 SRS信号强度大于预设的信号强度值, 和 /或, 信道质量大于预 设的信道质量值, 和 /或, 信道响应大于预设的信道响应值时, 第一终端通知另一终端进 行合作通信, 并开始与另一终端进行合作通信。 其中, 信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。 需要说明的是: 上述实施例提供的通信方法在进行通信时, 仅以上述各功能模块的 划分进行举例说明, 实际应用中, 可以根据需要而将上述功能分配由不同的功能模块完 成, 即将通信终端的内部结构划分成不同的功能模块, 以完成以上描述的全部或者部分 功能。 另外, 上述实施例提供的通信终端与通信方法实施例属于同一构思, 其具体实现 过程详见方法实施例, 这里不再赘述。 上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。 本发明实施例提供的终端, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与合作通信, 提高了 D2D通信质量。 实施例 6 参见图 7, 本发明实施例提供了一种通信系统, 所述系统包括: 基于 D2D通信的第 一终端 601、 基站 602和基于 D2D通信的第二终端 603; 第一终端 601, 用于向基站 602发起探测参考信号 SRS测量请求, 该 SRS测量请 求中携带 D2D通信的第二终端的标识, 接收基站响应于测量请求发送的通知消息, 该 通知消息中携带第二终端发送的 SRS信号的参数信息, 根据参数信息测量 SRS信号, 获得与第二终端之间信道的信道状态信息; 当信道状态信息满足预设条件时, 与第二终 端进行通信; 基站 602, 用于接收第一终端 601发起的 SRS测量请求, 根据第二终端的标识获取 第二终端发送的 SRS信号的参数信息, 并向第一终端发送用于测量 SRS信号的通知消 息, 该通知消息中携带第二终端发送的 SRS信号的参数信息; 第二终端 603, 用于发送 SRS信号。 其中, 第一终端可以为上述实施例 5记载的任一通信终端, 本发明对第一终端不做 限定。 本发明实施例提供的系统, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与合作通信, 提高 D2D通信质量。 实施例 7 参见图 8, 本发明实施例提供了一种基站, 所述基站包括: 接收模块 701, 用于接收 D2D通信的第一终端发起的 SRS测量请求, 该 SRS测量 请求中携带 D2D通信的第二终端的标识; 获取模块 702, 用于根据接收模块 701接收的第二终端的标识, 获取第二终端发送 的 SRS信号的参数信息; 发送模块 703, 用于向第一终端发送用于测量该 SRS信号的通知消息, 该通知消息 中携带第二终端发送的 SRS信号的参数信息。 本发明实施例提供的基站, 通过采用 LTE蜂窝系统中已有的 SRS信号进行信道探 测, 不会增加 UE 的复杂度和成本, 能够很好的实现与 LTE蜂窝系统的兼容, 实现了 D2D通信与 LTE蜂窝系统的统一调度与合作通信, 提高了 D2D通信质量。 本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来 完成, 也可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一种计算机可读 存储介质中, 上述提到的存储介质可以是只读存储器, 磁盘或光盘等。 以上所述仅为本发明的较佳实施例, 并不用以限制本发明, 凡在本发明的精神和原 则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权利要求
1、 一种信道探测方法, 其特征在于, 所述方法包括: 终端与终端之间的直接通信 D2D通信的第一终端向基站发起探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 接收所述基站响应于所述测量请求发送的通知消息,所述通知消息中携带所述第二 终端发送的 SRS信号的参数信息; 根据所述参数信息测量所述 SRS信号,获得所述第一终端与所述第二终端之间信道 的信道状态信息。
2、如权利要求 1所述的方法, 其特征在于, 所述信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。
3、一种根据权利要求 1至 2任一项权利要求所述的信道探测方法进行通信的方法, 其特征在于, 所述方法包括: 终端与终端之间的直接通信 D2D通信的第一终端向基站发起探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 接收所述基站响应于所述测量请求发送的通知消息,所述通知消息中携带所述第二 终端发送的 SRS信号的参数信息; 根据所述参数信息测量所述 SRS信号,获得所述第一终端与所述第二终端之间信道 的信道状态信息; 当所述信道状态信息满足预设条件时, 所述第一终端与所述第二终端进行通信。
4、如权利要求 3所述的方法, 其特征在于, 所述信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者, 所述第一终端与所述第二终端进行通信之前, 所述方法还包括: 判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大 于预设的信道质量值, 和 /或, 所述信道响应是否大于预设的信道响应值; 当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信道质量大于预设的信 道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 判断出所述信道状态信息满 足预设条件。
5、 如权利要求 3或 4所述的方法, 其特征在于, 所述 D2D通信的第一终端向基站 发起 SRS测量请求之前, 所述方法还包括: 所述第一终端接收所述第二终端发送的第一通知消息,所述第一通知消息携带所述 第二终端具有合作通信能力的信息; 所述第一终端与所述第二终端进行通信具体包括: 所述第一终端通知所述第二终端 进行合作通信, 并开始与所述第二终端进行合作通信。
6、 一种信道探测方法, 其特征在于, 所述方法包括: 接收终端与终端之间的直接通信 D2D通信的第一终端发起的探测参考信号 SRS测 量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 根据所述第二终端的标识, 获取所述第二终端发送的 SRS信号的参数信息; 向所述第一终端发送用于测量所述 SRS信号的通知消息,所述通知消息中携带所述 第二终端发送的 SRS信号的参数信息。
7、 如权利要求 6所述的方法, 其特征在于, 所述根据所述第二终端的标识, 获取 所述第二终端发送的 SRS信号的参数信息, 包括: 根据所述第二终端的标识为所述第二终端分配 SRS 信号, 指示所述第二终端发送 SRS信号; 获取所述第二终端发送的 SRS信号的参数信息。
8、如权利要求 6所述的方法, 其特征在于, 所述信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。
9、 一种基于终端与终端之间的直接通信 D2D的通信终端, 其特征在于, 所述通信 终端包括: 发送模块, 用于向基站发起探测参考信号 SRS测量请求, 所述 SRS测量请求中携 带 D2D通信的另一终端的标识; 接收模块, 用于接收基站响应于所述测量请求发送的通知消息, 所述通知消息中携 带所述另一终端发送的 SRS信号的参数信息; 测量模块,用于根据所述接收模块接收的所述参数信息测量所述 SRS信号,获得所 述通信终端与所述另一终端之间信道的信道状态信息; 通信模块, 用于当所述信道状态信息满足预设条件时, 所述通信终端与所述另一终 端进行通信。
10、 如权利要求 9所述的通信终端, 其特征在于, 所述通信模块包括判断单元和通 信单元; 所述判断单元, 用于判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大于预设的信道质量值,和 /或,所述信道响应是否大于预设的信道响 应值; 所述通信单元, 用于当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信 道质量大于预设的信道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 所述第 一终端与所述另一终端进行通信。
11、 如权利要求 9所述的通信终端, 其特征在于, 所述通信终端还用于接收所述另 一终端发送的第一通知消息,所述第一通知消息携带所述另一终端具有合作通信能力的 信息; 相应地, 所述通信模块包括判断单元和通信单元; 所述判断单元, 用于判断所述 SRS信号强度是否大于预设的信号强度值, 和 /或, 所述信道质量是否大于预设的信道质量值,和 /或,所述信道响应是否大于预设的信道响 应值; 所述通信单元, 用于当所述 SRS信号强度大于预设的信号强度值, 和 /或, 所述信 道质量大于预设的信道质量值, 和 /或, 所述信道响应大于预设的信道响应值时, 所述第 一终端通知所述另一终端进行合作通信, 并开始与所述另一终端进行合作通信。
12、如权利要求 9所述的方法,其特征在于,所述信道状态信息包括 SRS信号强度、 信道质量和信道响应三者中的至少一者。
13、 一种通信系统, 其特征在于, 所述系统包括: 终端与终端之间的直接通信 D2D 通信的第一终端、 基站和 D2D通信的第二终端; 所述第一终端, 用于向所述基站发起探测参考信号 SRS测量请求, 所述 SRS测量 请求中携带 D2D通信的第二终端的标识, 接收所述基站响应于所述测量请求发送的通 知消息,所述通知消息中携带所述第二终端发送的 SRS信号的参数信息,根据所述参数 信息测量所述 SRS信号,获得与所述第二终端之间信道的信道状态信息; 当所述信道状 态信息满足预设条件时, 与所述第二终端进行通信; 所述基站,用于接收所述第一终端发起的 SRS测量请求,根据所述第二终端的标识 获取所述第二终端发送的 SRS 信号的参数信息, 并向所述第一终端发送用于测量所述 SRS信号的通知消息, 所述通知消息中携带所述第二终端发送的 SRS信号的参数信息; 所述第二终端, 用于发送 SRS信号。
14、 一种基站, 其特征在于, 所述基站包括: 接收模块, 用于接收终端与终端之间的直接通信 D2D通信的第一终端发起的探测 参考信号 SRS测量请求, 所述 SRS测量请求中携带 D2D通信的第二终端的标识; 获取模块, 用于根据所述接收模块接收的所述第二终端的标识, 获取所述第二终端 发送的 SRS信号的参数信息; 发送模块, 用于向所述第一终端发送用于测量所述 SRS信号的通知消息, 所述通知 消息中携带所述第二终端发送的 SRS信号的参数信息。
15、 如权利要求 14所述的基站, 其特征在于, 所述获取模块, 具体用于根据所述 接收模块接收的所述第二终端的标识为所述第二终端分配 SRS信号,指示所述第二终端 发送 SRS信号; 获取所述第二终端发送的 SRS信号的参数信息。
16、 如权利要求 14所述的基站, 其特征在于, 所述信道状态信息包括 SRS信号强 度、 信道质量和信道响应三者中的至少一者。
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