WO2017028378A1 - 一种通信的方法、终端及基站 - Google Patents

一种通信的方法、终端及基站 Download PDF

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Publication number
WO2017028378A1
WO2017028378A1 PCT/CN2015/093524 CN2015093524W WO2017028378A1 WO 2017028378 A1 WO2017028378 A1 WO 2017028378A1 CN 2015093524 W CN2015093524 W CN 2015093524W WO 2017028378 A1 WO2017028378 A1 WO 2017028378A1
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WIPO (PCT)
Prior art keywords
terminal
relay
base station
system information
information block
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PCT/CN2015/093524
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English (en)
French (fr)
Inventor
雷艺学
吴宽
江明
郑倩
张晨璐
张云飞
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Publication of WO2017028378A1 publication Critical patent/WO2017028378A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method, a terminal, and a base station.
  • D2D communication is a new technology that allows terminals to communicate directly by multiplexing cell resources under the control of the system. It can increase the spectrum efficiency of the cellular communication system and reduce the terminal. The transmission power solves the problem of lack of spectrum resources of the wireless communication system to a certain extent.
  • the D2D communication technology specifically refers to direct communication between terminals, and does not need to be transmitted or forwarded through a device such as a base station.
  • D2D can be deployed within cellular network coverage and/or outside network coverage.
  • the function of the relay terminal is a new feature introduced in D2D communication. Its deployment is very flexible, and it can expand the network coverage without increasing the existing network equipment. In commercial communication, public safety communication (such as earthquake, war), etc. The field has important applications. Therefore, D2D communication and relay terminals have good application prospects.
  • the terminal under the coverage of the base station is only an ordinary terminal before becoming the relay terminal, it needs to be initialized so that it can perform data forwarding for the base station and the remote terminal to complete the relay.
  • the existing protocol specifications there is no specific scheme for relay initialization of the terminal.
  • the technical problem to be solved by the embodiments of the present invention is to provide a communication method, a terminal, and a base station. To solve the problem of how the terminal is initialized as a relay terminal to complete relay communication.
  • a first aspect of the embodiments of the present invention provides a communication method, including:
  • the terminal If the terminal satisfies the condition of becoming a relay terminal, broadcasting a relay notification message as a relay terminal, A remote terminal within its signal coverage is informed, which provides a relay service.
  • the acquiring, by the terminal, the system information block message sent by the base station includes:
  • the terminal determines that it can become a relay terminal according to the power capacity and/or the reference signal received power, transmitting a relay initialization request message for requesting to become the relay terminal to the base station;
  • the acquiring, by the terminal, the system information block message sent by the base station includes:
  • the terminal monitors a system information block message periodically broadcast by the base station.
  • the terminal determines that it can become a relay terminal according to the power capacity and/or the reference signal received power, the terminal listens to the system information block message broadcast by the base station.
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • a second aspect of the embodiments of the present invention provides a communication method, including:
  • the base station periodically broadcasts a system information block message, where the system information block message includes parameter information for selecting a relay terminal, so that the terminal determines, according to the parameter information, that the user meets the relay terminal.
  • the relay terminal broadcasts a relay notification message as a relay terminal to inform the remote terminal within the coverage of the signal, and the terminal provides a relay service; or
  • the base station After the terminal determines that the terminal can become the relay terminal according to the power capacity and/or the reference signal received power, the base station receives the relay initialization request message sent by the terminal for requesting to become the relay terminal, and returns the system information block message.
  • the system information block message includes parameter information for selecting a relay terminal, so that the terminal determines, according to the parameter information, that it satisfies the condition of becoming a relay terminal, and broadcasts the relay as a relay terminal.
  • a notification message informs the remote terminal within its signal coverage that the relay service is provided.
  • the base station receives the relay initialization request message that exceeds the preset number of times within the preset time period, the period of the broadcast system information block message is extended.
  • the parameter information for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the parameter information used for selecting the relay terminal further includes at least one of the following information:
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • the method further includes:
  • a terminal including:
  • An acquiring unit configured to acquire a system information block message sent by the base station, where the system information block message includes parameter information for selecting a relay terminal;
  • a determining unit configured to determine, according to the parameter information, whether the terminal satisfies a condition that becomes a relay terminal;
  • a broadcast unit configured to: if the terminal satisfies a condition of becoming a relay terminal, the broadcast unit broadcasts a relay notification message to notify a remote terminal within a signal coverage range, and the terminal provides a relay service.
  • the obtaining unit is specifically configured to:
  • the terminal can be a relay terminal, sending a relay initialization request message for requesting to become a relay terminal to the base station;
  • the obtaining unit is specifically configured to:
  • the obtaining unit is specifically configured to:
  • the terminal can become a relay terminal, the system information block message broadcast by the base station is monitored.
  • the parameter information for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the parameter information used for selecting the relay terminal further includes at least one of the following information:
  • the parameter information for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the sending unit is further configured to: before sending the system information block message to the terminal or the periodic broadcast system information block message, acquire a priority of the current remote terminal's relay demand and/or the relay request;
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for communicating according to the present invention
  • FIG. 2 is a schematic diagram of signaling interaction of a second embodiment of a method for communicating according to the present invention
  • FIG. 3 is a schematic diagram of signaling interaction of a third embodiment of a method for communicating according to the present invention.
  • FIG. 4 is a schematic diagram of signaling interaction of a fourth embodiment of a method for communicating according to the present invention.
  • Figure 6 is a schematic diagram showing the composition of a first embodiment of the terminal of the present invention.
  • Figure 7 is a schematic diagram showing the composition of a second embodiment of the terminal of the present invention.
  • the terminal acquires a System Information Block (SIB) message sent by the base station.
  • SIB System Information Block
  • the parameter information used for selecting the relay terminal includes a reference signal receiving power (RSRP) threshold value and a threshold value of the number of times the cell changes within a preset time.
  • RSRP reference signal receiving power
  • RSRP is one of the key parameters of the LTE network that can represent the wireless signal strength and one of the physical layer measurement requirements, and is the average value of the signal power received on all resource particles (RE) carrying the reference signal within a certain symbol.
  • the terminal is only possible if the RSRP value of the terminal reaches a certain threshold. Used as a relay terminal; the number of cell changes in a preset time period can be used to characterize the stability of the terminal. If the number of times changes within a preset time, such as 24 hours, if the number of times exceeds the threshold, the relay is not met.
  • the standard of the terminal can only provide a relay service for the remote terminal more stably than the threshold of the set number of times.
  • the parameter information used for selecting the relay terminal may further include at least one of the following information:
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • the base station can also select the terminal by setting a threshold number of remote terminals for the service.
  • the terminal can monitor whether the remote terminal in the coverage of the model exceeds its service capability. If it exceeds, the initialization of the relay terminal may not be performed, or the relay initialization may be performed, but the distance is excluded during the relay service. Remote terminal with far or weak signal.
  • the base station sets the number of services that must be met in the reference information, the terminal must meet the number threshold requirement before it can be selected by the base station as the relay terminal.
  • the above parameter information may be separately defined, or may be defined in any combination, thereby enabling flexible selection and filtering of whether the terminal can become a relay terminal.
  • step S102 The terminal determines, according to the parameter information, whether it satisfies a condition of becoming a relay terminal. If yes, step S103 is performed, otherwise no processing is required.
  • the terminal can perform comparison and matching according to the parameter information. If the terminal can satisfy all the conditions, the relay initialization step can be continued. Otherwise, the terminal does not have the capability of becoming a relay terminal, and no relay initialization is required.
  • S103 As a relay terminal, broadcast a relay notification message, and notify a remote terminal within the coverage of the signal, and the terminal provides a relay service.
  • the parameter information for selecting the relay terminal is known, and the terminal can determine whether it satisfies the condition of becoming the relay terminal according to the parameter information, and directly serves as the relay terminal when satisfied. Broadcasting a relay notification message to inform the remote terminal within its signal coverage that the terminal provides a relay service, thereby completing the process of relay initialization, so that the remote terminal can send a relay request to complete the relay communication, filling
  • the blank of the existing protocol specification facilitates the relay terminal to quickly respond to the relay request of the remote terminal, and provides a better relay service for the remote terminal.
  • the architecture of the entire communication system includes a base station, a terminal 1 and a terminal 2, wherein the terminal 1 is provided with a relay.
  • the terminal of the capability can complete the relay initialization after the process described in this embodiment, and performs functions such as data forwarding by the relay terminal.
  • Terminal 2 is a remote terminal and has a relay requirement.
  • the interaction process of the three includes the following steps:
  • the terminal 1 predetermines whether it can become a relay terminal based on the power capacity and/or the reference signal received power.
  • the terminal 1 can determine the data according to the current data, and can also perform the determination according to the historical data, which is not limited in the embodiment of the present invention.
  • a relay initialization request message for requesting to become a relay terminal is transmitted to the base station.
  • the base station responds to the relay request initialization message and returns a system information block message to the terminal 1.
  • the terminal 1 determines whether it satisfies the condition of becoming a relay terminal based on the parameter information included in the system information block message.
  • the terminal 1 If the terminal 1 satisfies the condition of becoming a relay terminal, the terminal 1 becomes a relay terminal.
  • a remote terminal that is informed of its signal coverage can provide relay services.
  • the terminal needs to perform the pre-judgment of the relay condition first, and actively reports the relay initialization request message to the base station to inform the base station of its own relay initialization tendency, so that the relay establishment process is the most active, such that the remote terminal That is, the relay request of the terminal 2 can obtain a faster response; and the base station does not need to actively broadcast the SIB message including the parameter information as the selection criterion, so that the signaling consumption can be saved in a large amount.
  • the architecture of the entire communication system includes a base station, a terminal 1 and a terminal 2, wherein the terminal 1 is provided with a relay.
  • the terminal of the capability can complete the relay initialization after the process described in this embodiment, and performs functions such as data forwarding by the relay terminal.
  • Terminal 2 is a remote terminal and has a relay requirement.
  • the interaction process of the three includes the following steps:
  • the terminal 1 listens to the system information block message periodically broadcast by the base station.
  • the base station periodically broadcasts a system information block message.
  • the terminal 1 determines whether it satisfies the condition of becoming a relay terminal based on the parameter information included in the system information block message.
  • the terminal 1 If the terminal 1 satisfies the condition of becoming a relay terminal, the terminal 1 becomes a relay terminal.
  • a remote terminal that is informed of its signal coverage can provide relay services.
  • the terminal does not need to perform the process of pre-judgment, and only needs to listen to the SIB message broadcast by the base station, and judge whether it meets the relay requirement according to the parameter information carried therein, and if it matches, directly becomes the relay terminal, and the broadcast relay
  • the notification message can reduce the flow brought by the terminal pre-judgment process and the corresponding energy consumption, which can further improve the speed of the relay initialization.
  • FIG. 4 is a schematic diagram of signaling interaction according to a fourth embodiment of a method for communicating according to the present invention.
  • the architecture of the entire communication system includes a base station, a terminal 1 and a terminal 2, wherein the terminal 1 is a terminal having a relay capability, and after the process described in this embodiment, the relay initialization can be completed. Following The terminal performs functions such as data forwarding.
  • Terminal 2 is a remote terminal and has a relay requirement.
  • the interaction process of the three includes the following steps:
  • the terminal 1 predetermines whether it can become a relay terminal based on the power capacity and/or the reference signal received power.
  • the terminal 1 determines whether it satisfies the condition of becoming a relay terminal based on the parameter information included in the system information block message.
  • the terminal 1 If the terminal 1 satisfies the condition of becoming a relay terminal, the terminal 1 becomes a relay terminal.
  • a remote terminal that is informed of its signal coverage can provide relay services.
  • the terminal that performs the relay condition pre-determination process does not actively send a relay initialization request message to the base station to indicate its relay tendency, but listens to the SIB message broadcast by the base station, and then responds, triggering according to the parameter.
  • the flow of information for the second judgment Compared with the second embodiment, although the speed of the relay establishment process is reduced due to the fact that the terminal does not actively inform the base station of the relaying tendency, the consumption caused by the reported message of the terminal can be reduced, and between the initialization speed of the relay and the consumption of the terminal. A balance has been achieved.
  • the method before the terminal acquires the system information block message sent by the base station, the method further includes:
  • the priority of the request can be understood as the urgency of the relay task. The higher the priority, the more urgent the relay task needs to be processed as soon as possible.
  • the terminal can select whether to perform the “relay condition pre-judgment according to the information and the capability information of the terminal itself. Then, the mechanism of returning the SIB message according to the relay request initialization message may be correspondingly opened in combination with the base station side, thereby implementing flexible switching of the above three relay initialization modes. For example, if the current system performs the relay initialization mode in the fourth embodiment, but in the system The number of remote terminals suddenly increases, and the demand for relays increases. This requires a quick response to the relay request. Therefore, the terminal with relay capability can start the relay pre-judgment according to the number of relay requests that are triggered.
  • the function of the base station may be corresponding to the management function of the relay initialization request message, and the system is converted into the mode in the second embodiment by the manner of the fourth embodiment; for example, the current system performs the mode in the second embodiment.
  • the relay demand of the remote terminal is gradually decreasing, and the remaining power of the terminal having the relay capability is not sufficient.
  • the terminal having the relay capability can turn off the relay preset according to the number of the initiated relay request that is monitored.
  • the base station can also perform the management function of the relay initialization request, and the system is switched to the mode in the fourth embodiment to perform the relay initialization in the manner of the second embodiment, thereby implementing flexible switching in various manners.
  • FIG. 5 is a schematic flowchart of a fifth embodiment of a method for communication according to the present invention.
  • the method includes the following steps:
  • the base station After the terminal determines that the terminal can become the relay terminal according to the power capacity and/or the reference signal received power, the base station receives the relay initialization request message sent by the terminal for requesting to become the relay terminal.
  • the system information block message includes parameter information for selecting a relay terminal.
  • the parameter information used for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the parameter information used for selecting the relay terminal further includes at least one of the following information:
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • the base station receives a relay initialization request message exceeding a preset number of times within a preset time period, the period of the broadcast system information block message is extended. Thereby, excessive terminals are prevented from transmitting the relay initialization request, and the power consumption of the base station and the terminal is reduced.
  • the specific interaction process between the base station and the terminal may refer to the second embodiment shown in FIG. 2 to FIG. 4 of the present invention.
  • the embodiment is to the fourth embodiment, and details are not described herein again.
  • the base station may directly broadcast the system information block message periodically for the terminal to monitor.
  • the method before the base station sends the system information block message to the terminal or the periodic broadcast system information block message, the method further includes:
  • FIG. 6 it is a schematic diagram of a composition of a first embodiment of a terminal according to the present invention.
  • the terminal includes:
  • the acquiring unit 100 is configured to acquire a system information block message sent by the base station, where the system information block message includes parameter information for selecting a relay terminal;
  • the determining unit 200 is configured to determine, according to the parameter information, whether the terminal satisfies a condition that becomes a relay terminal;
  • the broadcast unit 300 is configured to: if the terminal satisfies the condition of becoming a relay terminal, the broadcast unit broadcasts a relay notification message to notify a remote terminal within a signal coverage range, and the terminal provides a relay service.
  • the obtaining unit 100 is specifically configured to:
  • the terminal can be a relay terminal, sending a relay initialization request message for requesting to become a relay terminal to the base station;
  • the obtaining unit 100 is specifically configured to:
  • the obtaining unit 100 is specifically configured to:
  • the terminal can become a relay terminal, the system information block message broadcast by the base station is monitored.
  • the parameter information used for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the parameter information used for selecting the relay terminal further includes at least one of the following information.
  • Kind
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • FIG. 7 it is a schematic diagram of a composition of a second embodiment of the terminal according to the present invention.
  • the terminal further includes:
  • a determining unit 400 configured to: after the terminal acquires the system information block message sent by the base station, listen to a relay request of the remote terminal in the coverage of the terminal signal, and record information corresponding to the relay request, where The information corresponding to the relay request includes the number of remote terminals that initiate the relay request and/or the priority of the relay request;
  • the above obtaining unit 100, the determining unit 200, the broadcasting unit 300, and the determining unit 400 may exist independently or may be integrated, and the obtaining unit 100, the determining unit 200, the broadcasting unit 300, or the determining unit 400 may be independent of the processing of the terminal in the form of hardware.
  • the device is separately provided, and the setting form may be in the form of a microprocessor; it may also be embedded in the processor of the terminal in hardware form, or may be stored in the memory of the terminal in software to facilitate the processor of the terminal.
  • the operations corresponding to the above obtaining unit 100, the determining unit 200, the reporting unit 300, and the determining unit 400 are invoked.
  • the obtaining unit 100 and the broadcasting unit 300 can also be used as an interface circuit of the terminal, and can be integrated with the determining unit 200 or the determining unit 400, or can be independently set.
  • the determining unit 200 may be a processor of the terminal, and the functions of the obtaining unit 100, the broadcasting unit 300, and the determining unit 400 may be embedded.
  • the processor it can also be set separately from the processor, or can be stored in the memory in the form of software, and the function is called by the processor.
  • the embodiment of the invention does not impose any limitation.
  • the above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer, or the like.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes:
  • the receiving unit 500 is configured to: after the terminal determines that the terminal can become the relay terminal according to the power capacity and/or the reference signal receiving power, receive the request sent by the terminal to be the relay terminal. Relay initialization request message;
  • the sending unit 600 is configured to return a system information block message to the terminal, where the system information block message includes parameter information for selecting a relay terminal, so that the terminal determines, according to the parameter information, that the user meets the relay terminal.
  • the relay terminal broadcasts a relay notification message to inform the remote terminal within its signal coverage that the terminal provides the relay service.
  • the receiving unit 500 may not work, but only by the sending unit 600, for periodically broadcasting a system information block message, where the system information block message includes parameter information for selecting a relay terminal, so that the terminal After determining that the self meets the condition of becoming the relay terminal according to the parameter information, the relay terminal broadcasts a relay notification message to inform the remote terminal within the signal coverage range, and the terminal provides the relay service. It is also possible to send an SIB message to the terminal.
  • the sending unit 600 is further configured to:
  • the receiving unit 500 receives the relay initialization request message exceeding the preset number of times within the preset time period, the period of the broadcast system information block message is extended.
  • the parameter information used for selecting the relay terminal includes a reference signal receiving power threshold value and a threshold value of the number of times the cell changes within a preset time.
  • the parameter information used for selecting the relay terminal further includes at least one of the following information:
  • the power threshold value including a first threshold value corresponding to the executable resource scheduling, and a second threshold value corresponding to the remote terminal that can serve the coverage of the base station signal And corresponding to a third threshold value that can only serve the terminal within the signal coverage of the base station;
  • the sending unit 500 is further configured to: before sending the system information block message to the terminal or the periodic broadcast system information block message, acquire a priority of the current remote terminal's relay demand and/or the relay request;
  • the receiving unit 500 and the sending unit 600 may exist independently or may be integrated.
  • the receiving unit 500 or the sending unit 600 may be separately set in hardware form independently of the processor of the base station, and may be in the form of a microprocessor; Can be embedded in the processor of the base station in hardware form, It may also be stored in the memory of the base station in software, so that the processor of the base station invokes the operations corresponding to the above receiving unit 500 and the transmitting unit 600.
  • the sending unit 600 may be a processor of the base station, and the function of the receiving unit 500 may be embedded in the processor, or may be independent of
  • the processor is set separately and can also be stored in memory in the form of software, which is called by the processor to implement its functions.
  • the embodiment of the invention does not impose any limitation.
  • the above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer, or the like.
  • the present invention has the following advantages:
  • the parameter information for selecting the relay terminal is known, and the terminal can determine whether it satisfies the condition of becoming the relay terminal according to the parameter information, and directly serves as the relay terminal when satisfied. Broadcasting a relay notification message to inform the remote terminal within its signal coverage that the terminal provides a relay service, thereby completing the process of relay initialization, so that the remote terminal can send a relay request to complete the relay communication, filling
  • the blank of the existing protocol specification facilitates the relay terminal to quickly respond to the relay request of the remote terminal, and provides a better relay service for the remote terminal.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种通信的方法，包括：终端获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；所述终端根据所述参数信息判断自身是否满足成为中继终端的条件；若所述终端满足成为中继终端的条件，则作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。本发明实施例还公开了一种终端及基站。采用本发明，可将终端初始化为中继终端并完成中继通信。

Description

一种通信的方法、终端及基站 技术领域
本发明涉及通信技术领域，尤其涉及一种通信的方法、终端及基站。
背景技术
设备与设备(Device-to-Device，简称D2D)通信是一种在系统的控制下，允许终端之间通过复用小区资源直接进行通信的新型技术，它能够增加蜂窝通信系统频谱效率，降低终端发射功率，在一定程度上解决无线通信系统频谱资源匮乏的问题。D2D通信技术具体是指终端之间可以进行直接通信，而不需要经过基站等设备的传输或转发。D2D可部署在蜂窝网络覆盖范围内和/或网络覆盖范围外。中继终端的功能是在D2D通信中引入的新特性，其部署非常灵活，能够在不增加现有网络设备的情况下扩大网络覆盖范围，在商用通信、公共安全通信(如地震、战争)等领域有着重要应用。因此D2D通信及中继终端具有良好的应用前景。
由于基站覆盖范围下的终端在成为中继终端之前只是普通的终端，因此需要对其进行初始化，以便其为基站和远程终端进行数据转发，完成中继的作用。但是在现有的协议规范中，并没有对终端进行中继初始化的具体方案。
发明内容
本发明实施例所要解决的技术问题在于，提供一种通信的方法、终端及基站。以解决终端如何初始化为中继终端以完成中继通信的问题。
为了解决上述技术问题，本发明实施例第一方面提供了一种通信的方法，包括：
终端获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；
所述终端根据所述参数信息判断自身是否满足成为中继终端的条件；
若所述终端满足成为中继终端的条件，则作为中继终端广播中继通知消息， 告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
其中，所述终端获取基站发送的系统信息块消息，包括：
所述终端根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端；
若所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端，则发送用于请求成为中继终端的中继初始化请求消息至所述基站；
接收所述基站返回的系统信息块消息。
其中，所述终端获取基站发送的系统信息块消息，包括：
所述终端监听所述基站周期性广播的系统信息块消息。
其中，所述终端获取基站发送的系统信息块消息，包括：
所述终端根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端；
若所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端，则监听所述基站广播的系统信息块消息。
其中，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
其中，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
其中，在所述终端获取基站发送的系统信息块消息之前，还包括：
监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；
根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
本发明实施例第二方面提供了一种通信的方法，包括：
基站周期性广播系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息，以便终端根据所述参数信息确定自身满足成为中继终端的 条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务；或者
在所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端之后，基站接收所述终端发送的用于请求成为中继终端的中继初始化请求消息，返回系统信息块消息至所述终端，所述系统信息块消息中包含用于选择中继终端的参数信息，以便所述终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
其中，若所述基站在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。
其中，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
其中，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
其中，在基站发送系统信息块消息至终端或周期性广播系统信息块消息之前，还包括：
获取当前远程终端的中继需求量和/或中继请求的优先级；
根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。
相应地，本发明实施例第三方面提供了一种终端，包括：
获取单元，用于获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；
判断单元，用于根据所述参数信息判断所述终端是否满足成为中继终端的条件；
广播单元，用于若所述终端满足成为中继终端的条件，则所述广播单元广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
其中，所述获取单元具体用于：
根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
若所述终端能成为中继终端，则发送用于请求成为中继终端的中继初始化请求消息至所述基站；
接收所述基站返回的系统信息块消息。
其中，所述获取单元具体用于：
监听所述基站周期性广播的系统信息块消息。
其中，所述获取单元具体用于：
根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
若所述终端能成为中继终端，则监听所述基站广播的系统信息块消息。
其中，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
其中，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
其中，还包括：
确定单元，用于在所述终端获取基站发送的系统信息块消息之前，监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；
根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
本发明实施例第四方面提供了一种基站，包括：
发送单元，用于周期性广播系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息，以便终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务；或者包括：
接收单元，用于在所述终端根据功率容量和/或参考信号接收功率预先判断 自身能成为中继终端之后，接收所述终端发送的用于请求成为中继终端的中继初始化请求消息；
发送单元，用于返回系统信息块消息至所述终端，所述系统信息块消息中包含用于选择中继终端的参数信息，以便所述终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
其中，所述发送单元还用于：
若所述接收单元在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。
其中，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
其中，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
其中，所述发送单元还用于：在发送系统信息块消息至终端或周期性广播系统信息块消息之前，获取当前远程终端的中继需求量和/或中继请求的优先级；
根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。
实施本发明实施例，具有如下有益效果：
通过获取基站发送的系统信息块消息，从而得知用于选择中继终端的参数信息，终端可根据这些参数信息确定自身是否满足成为中继终端的条件，且在满足的时候直接作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务，从而完成了中继初始化的过程，使得远程终端可向其发送中继请求来完成中继通信，填补了现有协议规范的空白，利于中继终端快速响应远程终端的中继请求，为远程终端提供更佳的中继服务。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术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是本发明通信的方法的第一实施例的流程示意图；
图2是本发明通信的方法的第二实施例的信令交互示意图；
图3是本发明通信的方法的第三实施例的信令交互示意图；
图4是本发明通信的方法的第四实施例的信令交互示意图；
图5是本发明通信的方法的第五实施例的流程示意图；
图6是本发明终端的第一实施例的组成示意图；
图7是本发明终端的第二实施例的组成示意图；
图8是本发明实施例基站的组成示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参照图1，为本发明通信的方法的第一实施例的流程示意图，在本实施例中，所述方法包括以下步骤：
S101，终端获取基站发送的系统信息块(System Information Block，简称SIB)消息。
其中，所述系统信息块消息中包含用于选择中继终端的参数信息。这些参数信息可以作为基站选择中继终端的标准。
可选地，所述用于选择中继终端的参数信息，包括参考信号接收功率(Reference Signal Receiving Power，简称RSRP)门限值以及在预设时间内小区变化的次数门限值。
其中，RSRP是LTE网络中可以代表无线信号强度的关键参数以及物理层测量需求之一，是在某个符号内承载参考信号的所有资源粒子(RE)上接收到的信号功率的平均值。只有终端的RSRP数值达到一定的门限值时，终端才可能 作为中继终端使用；而预设时间内小区变化的次数则可以表征终端的稳定性，若其在预设时间如24小时内变化的次数过多，超过门限值时，则不符合中继终端的标准，只有低于设定的次数门限值时才能更佳的稳定的为远程终端提供中继服务。
需要说明的是，此处的两个门限值可以由设备生产厂商在设备出厂时设置或者提供若干设置选项供用户选择，也可以由用户自定义，本发明实施例不作任何限定。
可选地，除了上述两个参数信息之外，所述用于选择中继终端的参数信息，还可以包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
在3GPP技术中，将D2D终端之间的链路定义为副链路，并且定义了两种资源分配方式：调度模式和资源池自选模式。当终端处于基站网络覆盖范围内时，可以根据基站的配置采用任一种方式进行资源分配；当采用资源池自选模式时，资源池信息由基站通过无线资源控制(Radio Resource Control，简称RRC)(SIB18)设置,并通过广播的方式告知覆盖范围内的终端该资源池信息。而对于可作为中继终端的终端来说，基站在选择中继终端时，还可以设定功率门限值来进行筛选，且功率门限值还可以进行阶梯型的区分。例如，划分为三个功率门限值，分别对应不同级别的能力，当终端的功率达到不同的门限值时，基站便可以根据其能力选择终端作为合适的中继终端。
而且，基站还可以通过设定服务的远程终端的数量门限值来对终端进行选择。其中，终端可以监听其型号覆盖范围内的远程终端是否超过其服务能力，若超过，则可以不进行中继终端的初始化，或者也可以进行中继初始化但在中继服务时排除掉部分距离较远或信号较弱的远程终端。而当基站在参考信息中设定必须满足的服务数量要求时，则终端必须达到数量门限值要求，才可能被基站选择作为中继终端。
需要说明的是，以上的参数信息可以单独限定，也可以进行任意组合的限定，从而实现对终端是否能成为中继终端进行灵活的选择和过滤。
S102，所述终端根据所述参数信息判断自身是否满足成为中继终端的条件。若满足，则执行步骤S103，否则无需进行任何处理。
具体地，当终端从SIB消息中获取到用于选择中继终端的参数信息之后，便可以根据这些参数信息来进行对照和匹配。若终端能满足所有的条件，便可以继续执行中继初始化的步骤，否则，则说明终端不具备成为中继终端的能力，无需再进行中继初始化。
S103，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
可选地，位于基站信号覆盖范围内的终端可以是0个，也可以是一个或多个，其中，具备中继能力的终端数量也可能是0个、1个或多个。当终端通过参数信息的判断符合中继终端的要求之后，便可以成为中继终端，当符合要求的终端数量大于两个时，这两个终端都可以成为中继终端。由于基站不获知终端是否成为中继终端，也不参与中继终端初始化管理与中继终端选定，终端只需要依据SIB消息中的参考信息自行判断并完成中继初始化，因此可以大大提升中继终端初始化进程，使得远程终端的中继请求得到更快的响应。
通过获取基站发送的系统信息块消息，从而得知用于选择中继终端的参数信息，终端可根据这些参数信息确定自身是否满足成为中继终端的条件，且在满足的时候直接作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务，从而完成了中继初始化的过程，使得远程终端可向其发送中继请求来完成中继通信，填补了现有协议规范的空白，利于中继终端快速响应远程终端的中继请求，为远程终端提供更佳的中继服务。
请参照图2，为本发明通信的方法的第二实施例的信令交互示意图，在本实施例中，整个通信系统的架构包括基站，终端1和终端2，其中，终端1为具备中继能力的终端，在经过本实施例所述的流程后可完成中继初始化，作为中继终端进行数据转发等功能。终端2为远程终端，具备中继需求。具体地，三者的交互流程包括以下步骤：
1.终端1根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端。
此处终端1可以根据当前检测到的一些数据进行判断，也可以根据历史数据进行判断，本发明实施例不作任何限定。
2.若预先判断能成为中继终端，则发送用于请求成为中继终端的中继初始化请求消息至基站。
3.基站响应中继请求初始化消息，返回系统信息块消息给终端1。
4.终端1根据系统信息块消息包含的参数信息判断自身是否满足成为中继终端的条件。
5.若终端1满足成为中继终端的条件，则终端1成为中继终端。
6.广播中继通知消息。告知其信号覆盖范围内的远程终端可提供中继服务。
在本发明实施例中，由于终端需要先进行中继条件的预判断，并主动向基站上报中继初始化请求消息，告知基站自己的中继初始化倾向，使得中继建立过程最为主动，这样远程终端即终端2的中继请求能够得到较快的响应；且基站不需主动广播包含作为选择标准的参数信息的SIB消息，因此可大量节省信令消耗。
请参照图3，为本发明通信的方法的第三实施例的信令交互示意图；在本实施例中，整个通信系统的架构包括基站，终端1和终端2，其中，终端1为具备中继能力的终端，在经过本实施例所述的流程后可完成中继初始化，作为中继终端进行数据转发等功能。终端2为远程终端，具备中继需求。具体地，三者的交互流程包括以下步骤：
1.终端1监听基站周期性广播的系统信息块消息。
2.基站周期性广播系统信息块消息。
3.终端1根据系统信息块消息包含的参数信息判断自身是否满足成为中继终端的条件。
4.若终端1满足成为中继终端的条件，则终端1成为中继终端。
5.广播中继通知消息。告知其信号覆盖范围内的远程终端可提供中继服务。
在实施例中，终端无需进行预判断的过程，只需监听基站广播的SIB消息，并根据其中携带的参数信息判断自身是否符合中继要求，若符合，则直接成为中继终端，广播中继通知消息，从而可以降低终端进行中继预判断过程带来的流程以及相应的能耗，能更进一步提升中继初始化的速度。
请参照图4，为本发明通信的方法的第四实施例的信令交互示意图。在本实施例中，整个通信系统的架构包括基站，终端1和终端2，其中，终端1为具备中继能力的终端，在经过本实施例所述的流程后可完成中继初始化，作为中继 终端进行数据转发等功能。终端2为远程终端，具备中继需求。具体地，三者的交互流程包括以下步骤：
1.终端1根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端。
2.若预先判断能成为中继终端，则监听基站广播的系统信息块消息。
3.基站周期性广播的系统信息块消息。
4.终端1根据系统信息块消息包含的参数信息判断自身是否满足成为中继终端的条件。
5.若终端1满足成为中继终端的条件，则终端1成为中继终端。
6.广播中继通知消息。告知其信号覆盖范围内的远程终端可提供中继服务。
在本实施例中，执行了中继条件预判断流程的终端不主动向基站发送中继初始化请求消息以表明其中继倾向，而是监听到基站广播的SIB消息后，再进行响应，触发根据参数信息进行第二次判断的流程。相比于第二实施例，虽然由于终端没有主动告知基站中继倾向导致中继建立过程速度降低，但却也因此可以减少终端上报消息带来的消耗，在中继初始化速度与终端消耗之间取得了平衡。
通过以上第二至第四实施例的描述，对本发明中继初始化的三种方式进行说明，此外，可选地，在所述终端获取基站发送的系统信息块消息之前，还包括：
监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；此处的中继请求的优先级可理解为中继任务的紧急程度，优先级越高，中继任务越紧急，需要尽快处理。
根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
因此，终端通过监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，便可以根据这些信息以及终端自身的能力信息选择是否进行“中继条件预判断”，再结合基站侧也可以对应开启是否根据中继请求初始化消息返回SIB消息的机制，从而实现上述三种中继初始化方式的灵活切换。例如，若当前系统执行的是第四实施例中的中继初始化方式，但系统中 远程终端的数量突然增多，中继需求增大，这就要求对中继请求的反应迅速，因此此时有中继能力的终端可以根据监听到发起的中继请求的数量开启中继预判断的功能，而基站则可以对应开启中继初始化请求消息的管理功能，系统由第四实施例的方式转换为第二实施例中的方式；又例如，当前系统执行的是第二实施例中的方式，但远程终端的中继需求在逐渐减少，同时有中继能力的终端剩余电量也并不充足，则此时有中继能力的终端可以根据监听到的发起中继请求的数量关闭中继预判断的功能，基站也可以对应关闭中继初始化请求的管理功能，系统由第二实施例中的方式转换为第四实施例中的方式进行中继初始化，从而实现各种方式的灵活切换。
请参照图5，为本发明通信的方法的第五实施例的流程示意图；在本实施例中，所述方法包括以下步骤：
S501，在终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端之后，基站接收所述终端发送的用于请求成为中继终端的中继初始化请求消息。
其中，所述系统信息块消息中包含用于选择中继终端的参数信息。
可选地，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
可选地，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
若所述基站在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。从而避免过多的终端发送中继初始化请求，减少基站和终端能耗。
S502，返回系统信息块消息至所述终端，以便所述终端根据参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
其中，基站与终端的具体交互过程可参照本发明图2至图4所示的第二实 施例至第四实施例，此处不再赘述。
或者，基站还可以直接周期性的广播系统信息块消息，以便终端监听。
可选地，在基站发送系统信息块消息至终端或周期性广播系统信息块消息之前，还包括：
获取当前远程终端的中继需求量和/或中继请求的优先级；
根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。从而实现中继初始化管理功能的开启和关闭。
请参照图6，为本发明终端的第一实施例的组成示意图；在本实施例中，所述终端包括：
获取单元100，用于获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；
判断单元200，用于根据所述参数信息判断所述终端是否满足成为中继终端的条件；
广播单元300，用于若所述终端满足成为中继终端的条件，则所述广播单元广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
可选地，所述获取单元100具体用于：
根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
若所述终端能成为中继终端，则发送用于请求成为中继终端的中继初始化请求消息至所述基站；
接收所述基站返回的系统信息块消息。
可选地，所述获取单元100具体用于：
监听所述基站周期性广播的系统信息块消息。
可选地，所述获取单元100具体用于：
根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
若所述终端能成为中继终端，则监听所述基站广播的系统信息块消息。
可选地，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
可选地，所述用于选择中继终端的参数信息，还包括以下信息中的至少一 种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
请参照图7，为本发明终端的第二实施例的组成示意图；在本实施例中，所述终端与图6所示终端相比，还包括：
确定单元400，用于在所述终端获取基站发送的系统信息块消息之前，监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；
根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
以上获取单元100、判断单元200、广播单元300和确定单元400可以独立存在，也可以集成设置，获取单元100、判断单元200、广播单元300或确定单元400可以以硬件的形式独立于终端的处理器单独设置，且设置形式可以是微处理器的形式；也可以以硬件形式内嵌于该终端的处理器中，还可以以软件形式存储于该终端的存储器中，以便于该终端的处理器调用执行以上获取单元100、判断单元200、上报单元300和确定单元400对应的操作。
当然，获取单元100和广播单元300也可以作为该终端的接口电路，可以与判断单元200或确定单元400集成，也可以独立设置。
例如，在本发明终端的第二实施例(图7所示的实施例)中，判断单元200可以为该终端的处理器，而获取单元100、广播单元300和确定单元400的功能可以内嵌于该处理器中，也可以独立于处理器单独设置，也可以以软件的形式存储于存储器中，由处理器调用实现其功能。本发明实施例不做任何限制。以上处理器可以为中央处理单元(CPU)、微处理器、单片机等。
请参照图8，为本发明实施例基站的组成示意图，在本实施例中，所述基站包括：
接收单元500，用于在所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端之后，接收所述终端发送的用于请求成为中继终端的 中继初始化请求消息；
发送单元600，用于返回系统信息块消息至所述终端，所述系统信息块消息中包含用于选择中继终端的参数信息，以便所述终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
或者，所述接收单元500可以不工作，而仅由所述发送单元600，用于周期性广播系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息，以便终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。同样可实现发送SIB消息至终端。
可选地，所述发送单元600还用于：
若所述接收单元500在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。
可选地，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
可选地，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
服务的远程终端的数量门限值。
可选地，所述发送单元500还用于：在发送系统信息块消息至终端或周期性广播系统信息块消息之前，获取当前远程终端的中继需求量和/或中继请求的优先级；
根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。
以上接收单元500和发送单元600可以独立存在，也可以集成设置，接收单元500或发送单元600可以以硬件的形式独立于基站的处理器单独设置，且设置形式可以是微处理器的形式；也可以以硬件形式内嵌于该基站的处理器中， 还可以以软件形式存储于该基站的存储器中，以便于该基站的处理器调用执行以上接收单元500和发送单元600对应的操作。
例如，在本发明基站的实施例(图8所示的实施例)中，发送单元600可以为该基站的处理器，而接收单元500的功能可以内嵌于该处理器中，也可以独立于处理器单独设置，也可以以软件的形式存储于存储器中，由处理器调用实现其功能。本发明实施例不做任何限制。以上处理器可以为中央处理单元(CPU)、微处理器、单片机等。
需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其它实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于装置实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
通过上述实施例的描述，本发明具有以下优点：
通过获取基站发送的系统信息块消息，从而得知用于选择中继终端的参数信息，终端可根据这些参数信息确定自身是否满足成为中继终端的条件，且在满足的时候直接作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务，从而完成了中继初始化的过程，使得远程终端可向其发送中继请求来完成中继通信，填补了现有协议规范的空白，利于中继终端快速响应远程终端的中继请求，为远程终端提供更佳的中继服务。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，简称ROM)或随机存储记忆体(Random Access Memory，简称RAM)等。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。

Claims (24)

  1. 一种通信的方法，其特征在于，包括：
    终端获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；
    所述终端根据所述参数信息判断自身是否满足成为中继终端的条件；
    若所述终端满足成为中继终端的条件，则作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
  2. 如权利要求所述1的方法，其特征在于，所述终端获取基站发送的系统信息块消息，包括：
    所述终端根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端；
    若所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端，则发送用于请求成为中继终端的中继初始化请求消息至所述基站；
    接收所述基站返回的系统信息块消息。
  3. 如权利要求1所述的方法，其特征在于，所述终端获取基站发送的系统信息块消息，包括：
    所述终端监听所述基站周期性广播的系统信息块消息。
  4. 如权利要求1所述的方法，其特征在于，所述终端获取基站发送的系统信息块消息，包括：
    所述终端根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端；
    若所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端，则监听所述基站广播的系统信息块消息。
  5. 如权利要求1所述的方法，其特征在于，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
  6. 如权利要求5所述的方法，其特征在于，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
    用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
    服务的远程终端的数量门限值。
  7. 如权利要求2-5任一项所述的方法，其特征在于，在所述终端获取基站发送的系统信息块消息之前，还包括：
    监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；
    根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
  8. 一种通信的方法，其特征在于，包括：
    基站周期性广播系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息，以便终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务；或者
    在所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端之后，基站接收所述终端发送的用于请求成为中继终端的中继初始化请求消息，返回系统信息块消息至所述终端，所述系统信息块消息中包含用于选择中继终端的参数信息，以便所述终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
  9. 如权利要求8所述的方法，其特征在于，若所述基站在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。
  10. 如权利要求8所述的方法，其特征在于，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
  11. 如权利要求10所述的方法，其特征在于，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
    用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
    服务的远程终端的数量门限值。
  12. 如权利要求8-11任一项所述的方法，其特征在于，在基站发送系统信息块消息至终端或周期性广播系统信息块消息之前，还包括：
    获取当前远程终端的中继需求量和/或中继请求的优先级；
    根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。
  13. 一种终端，其特征在于，包括：
    获取单元，用于获取基站发送的系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息；
    判断单元，用于根据所述参数信息判断所述终端是否满足成为中继终端的条件；
    广播单元，用于若所述终端满足成为中继终端的条件，则所述广播单元广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
  14. 如权利要求13所述的终端，其特征在于，所述获取单元具体用于：
    根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
    若所述终端能成为中继终端，则发送用于请求成为中继终端的中继初始化 请求消息至所述基站；
    接收所述基站返回的系统信息块消息。
  15. 如权利要求所述13所述的终端，其特征在于，所述获取单元具体用于：
    监听所述基站周期性广播的系统信息块消息。
  16. 如权利要求所述13所述的终端，其特征在于，所述获取单元具体用于：
    根据功率容量和/或参考信号接收功率预先判断所述终端能否成为中继终端；
    若所述终端能成为中继终端，则监听所述基站广播的系统信息块消息。
  17. 如权利要求13所述的终端，其特征在于，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
  18. 如权利要求17所述的终端，其特征在于，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
    用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
    服务的远程终端的数量门限值。
  19. 如权利要求14-17任一项所述的终端，其特征在于，还包括：
    确定单元，用于在所述终端获取基站发送的系统信息块消息之前，监听所述终端信号覆盖范围内的远程终端的中继请求，记录所述中继请求对应的信息，其中，所述中继请求对应的信息包括发起中继请求的远程终端数量和/或中继请求的优先级；
    根据所述中继请求对应的信息和/或所述终端能力信息确定是否执行根据功率容量和/或参考信号接收功率预先判断自身能否成为中继终端的步骤。
  20. 一种基站，其特征在于，包括：
    发送单元，用于周期性广播系统信息块消息，所述系统信息块消息中包含用于选择中继终端的参数信息，以便终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务；或者包括：
    接收单元，用于在所述终端根据功率容量和/或参考信号接收功率预先判断自身能成为中继终端之后，接收所述终端发送的用于请求成为中继终端的中继初始化请求消息；
    发送单元，用于返回系统信息块消息至所述终端，所述系统信息块消息中包含用于选择中继终端的参数信息，以便所述终端根据所述参数信息确定自身满足成为中继终端的条件之后，作为中继终端广播中继通知消息，告知其信号覆盖范围内的远程终端，所述终端提供中继服务。
  21. 如权利要求20所述的基站，其特征在于，所述发送单元还用于：
    若所述接收单元在预设时段内接收到超过预设次数的中继初始化请求消息，则延长广播系统信息块消息的周期。
  22. 如权利要求20所述的基站，其特征在于，所述用于选择中继终端的参数信息，包括参考信号接收功率门限值以及在预设时间内小区变化的次数门限值。
  23. 如权利要求22所述的基站，其特征在于，所述用于选择中继终端的参数信息，还包括以下信息中的至少一种：
    用于表征终端服务能力的功率门限值，所述功率门限值包括对应可执行资源调度的第一门限值、对应可服务所述基站信号覆盖范围外的远程终端的第二门限值以及对应仅可服务所述基站信号覆盖内的终端的第三门限值；
    服务的远程终端的数量门限值。
  24. 如权利要求20-23任一项所述的基站，其特征在于，所述发送单元还用于：在发送系统信息块消息至终端或周期性广播系统信息块消息之前，获取当前远程终端的中继需求量和/或中继请求的优先级；
    根据当前远程终端的中继需求量和/或中继请求的优先级选择周期性广播系统信息块消息或者仅在接收到中继初始化请求消息时为发送中继初始化请求消息的终端返回系统信息块消息。
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