WO2017133231A1 - 一种传输路径的切换方法、终端和系统 - Google Patents
一种传输路径的切换方法、终端和系统 Download PDFInfo
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- WO2017133231A1 WO2017133231A1 PCT/CN2016/097165 CN2016097165W WO2017133231A1 WO 2017133231 A1 WO2017133231 A1 WO 2017133231A1 CN 2016097165 W CN2016097165 W CN 2016097165W WO 2017133231 A1 WO2017133231 A1 WO 2017133231A1
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- terminal
- egress
- base station
- handover
- local terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
Definitions
- the present invention relates to the field of communications, and in particular, to a method, a terminal, and a system for switching a transmission path.
- the existing mobility management method of the user equipment is: in the process of data transmission between the user equipment and the serving base station, the user equipment or the serving base station finds that the current Uu link does not meet the transmission requirement, and determines that the base station handover is required, the user The device or the serving base station triggers the cell handover procedure, and the user equipment switches the current serving base station to the base station with better Uu link quality.
- the density of deployed base stations becomes larger and larger, and the cell coverage of each base station also shrinks accordingly.
- frequent cell handover is required, resulting in continuity of services. Not guaranteed.
- a technical problem to be solved by embodiments of the present invention is to provide a method for switching a transmission path. Improve business continuity and reliability.
- an embodiment of the present invention provides a method for switching a transmission path, including: determining, when a local terminal meets a preset path switching condition, a target transmission path from an associated transmission path set; the local terminal Determining an egress terminal and an egress base station corresponding to the target transmission path; the local terminal sending a handover request message to the egress terminal; the handover request message includes feature information of the local terminal; and the local terminal receives the When the handover confirmation message returned by the egress terminal is completed, the path switching operation is completed according to the handover confirmation message; or the local terminal receives the handover indication returned by the serving base station, and completes the path switching operation according to the handover indication message.
- the embodiment of the present invention further provides a terminal, including: a first determining module, configured to: when a preset path switching condition is met, determine a target transmission path from the set of associated transmission paths; and a second determining module, Set to determine an exit terminal and an egress base station corresponding to the target transmission path; a sending module, configured to send a handover request message to the egress terminal; the handover request message includes feature information of the terminal; and a handover execution module, configured to receive a handover confirmation message returned by the egress terminal, according to the The handover confirmation message completes the path switching operation; or when the handover indication returned by the serving base station is received, the path switching operation is completed according to the handover indication message.
- a terminal including: a first determining module, configured to: when a preset path switching condition is met, determine a target transmission path from the set of associated transmission paths; and a second determining module, Set to determine an exit terminal and an egress base station corresponding to the target transmission path; a sending
- the embodiment of the present invention provides a communication system including: a local terminal, an egress terminal, and an egress base station; when the local terminal satisfies a preset path switching condition, the local terminal determines from the associated transmission path set.
- the local terminal determines the egress terminal and the egress base station corresponding to the target transmission path; the local terminal sends a first handover request message to the egress terminal; the handover request message includes the The feature information of the local terminal; the egress terminal receives the first handover request message, and the egress terminal determines whether to allow relay according to the state information; if the judgment result is yes, the egress terminal sends the egress to the egress base station, including a second handover request message of the feature information of the local terminal and/or the feature information of the egress base station; the egress base station receives the second handover request message, and the serving base station determines whether path switching is allowed; If yes, the egress base station sends a local terminal to the serving base station of the local terminal.
- the serving base station receives the third path switch request, and the serving base station determines whether to allow Switching; if the determination result is yes, the serving base station returns a handover indication message including a connection parameter to the local terminal; the local terminal receives the handover indication message, and the local terminal completes a path switching operation according to the connection parameter Or the serving base station returns a handover confirmation message to the egress base station; the egress base station returns the handover confirmation message to the local terminal via the egress terminal; the local terminal receives a handover confirmation returned by the egress terminal And completing the path switching operation according to the handover confirmation message.
- the embodiment of the present invention has the following beneficial effects: when the current transmission link cannot meet the transmission requirement, the local terminal determines the target transmission path from the associated transmission path set, and sends the target transmission path to the egress terminal and the egress base station corresponding to the target transmission path.
- the path switching request is performed to complete the path switching operation, and the current transmission path is switched to the target transmission path, and the local terminal can communicate with the serving base station or other base stations through the relay of other terminals, thereby improving service continuity and reliability.
- FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
- FIG. 2 is a schematic flowchart of a method for switching a transmission path according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of interaction of a method for switching a transmission path according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- FIG. 5 is another schematic structural diagram of a terminal according to an embodiment of the present invention.
- the communication system includes multiple base stations and multiple terminals, and multiple terminals form a self-organizing network, and the terminal and the terminal can directly communicate, and the terminal can be a D2D terminal or TSC terminal.
- the local terminal meets the preset path switching condition, the local terminal determines the target transmission path from the associated transmission path set, and the local terminal determines the egress base station corresponding to the target transmission path, and the egress base station may be the serving base station of the local terminal or the corresponding path on the transmission path.
- the serving base station of the other terminal the local terminal sends a first handover request message to the egress base station, and the local terminal determines whether to allow the relay according to the state information.
- the egress terminal sends the feature including the local terminal and the egress terminal to the egress base station.
- the second handover request message of the information the egress base station receives the second handover request message, and the egress base station determines whether the path handover is allowed according to the state information. If the judgment result is yes, the egress base station sends the feature information including the local terminal to the serving base station of the local terminal.
- the third handover request message of one or more of the feature information of the egress terminal and the feature information of the egress base station, the serving base station receives the third handover request message, and determines whether the handover is allowed. If the determination result is yes, the serving base station sends the local terminal to the local terminal.
- the local terminal receives the handover indication message, and the local terminal performs a path handover operation according to the connection parameter; or the serving base station returns a handover confirmation message to the local terminal through the egress base station and the egress terminal, and the local terminal receives the handover confirmation message, and executes Path switching operation.
- the communication system includes three base stations: a base station 10, a base station 11, and a base station 12, and four terminals: UE1, UE2, UE3, and UE4, and UE1 is a local terminal, and the uplink direction is an example, and UE1 is associated with
- the transmission path set includes four transmission paths, and the transmission path 1: UE1 ⁇ base station 10, transmission path 2: UE1 ⁇ UE2 ⁇ base station 10, transmission path 3: UE1 ⁇ UE3 ⁇ base station 11, transmission path 4: UE1 ⁇ UE3 ⁇ UE4 ⁇ base station 11 assumes that UE1 currently uses transmission path 1 for data transmission.
- UE1 finds that the link state of transmission path 1 is unavailable, UE1 acquires the associated transmission path set, and UE1 acquires the associated transmission. One or more transmission paths are selected in the path set. If the UE1 selects the transmission path 2 as the target transmission path, the UE determines that the egress terminal in the transmission path 2 is the UE2, and the egress base station is the base station 10, and the UE1 sends a first handover request message to the UE2.
- the path switching process is completed according to the foregoing processing method, and details are not described herein; if the target transmission path selected by the UE1 is the transmission path 3, the UE1 determines that the transmission path 4 is the target transmission path, according to The location and topology connection relationship of each node in the standard transmission path determines that the egress terminal is UE4, the egress base station is the base station 12, and the relay node is UE3.
- the UE1 sends a first handover request message to the UE3, and the UE3 allows the first handover request after the relay.
- the message is forwarded to the egress terminal, and the path switching process is completed according to the foregoing processing method, and is not described here.
- the target transmission path selected by the UE1 is multiple transmission paths, the transmission may be performed in a broadcast manner or separately.
- the egress terminal corresponding to the path sends a first handover request message.
- the local terminal determines the target transmission path from the associated transmission path set, and sends a path switching request to the egress terminal and the egress base station corresponding to the target transmission path.
- the current transmission path is switched to the target transmission path, and the local terminal can communicate with the serving base station or other base stations through the relay of other terminals, thereby improving service continuity and reliability.
- FIG. 2 is a schematic flowchart of a method for switching a transmission path according to an embodiment of the present invention.
- the method includes:
- the transmission path set represents a set of all transmission paths currently available to the local terminal
- the transmission path includes at least one communication link
- the communication link represents a data transmission channel between the two network nodes, which may be wireless or wired.
- the local terminal finds that the current transmission path cannot satisfy the normal data transmission, for example, a communication link in the current transmission path is unavailable.
- the local terminal passes the preset
- the target transmission path is determined in the set of transmission paths associated with the local terminal, and the number of the target transmission paths determined by the local terminal from the set of transmission paths may be one or more.
- the local terminal updates the associated transmission path set in real time, ensures that the transmission path in the transmission path set is an available transmission path, and the transmission path set is updated.
- Method The present invention is not limited, and can be updated and maintained by a local terminal or set up by a separate network node for update maintenance.
- the local terminal determines an egress terminal and an egress base station corresponding to the target transmission path.
- each transmission path corresponds to only one base station
- the base station is an egress base station
- the egress base station may be a serving base station of the local terminal or a serving base station of another terminal corresponding to the transmission path
- the hop count between the egress base station and the egress base station is 1.
- the terminal is an egress terminal
- the relay node represents a node for relay transmission between the local terminal and the egress terminal
- the relay node may be a terminal, a base station, or other network device, for example, if the local terminal and the egress terminal still exist before At least one terminal, these terminals become relay nodes.
- the local terminal determines the egress terminal, the egress base station, and the relay node according to the location and topology connection relationship of each network node in the target transmission path.
- the target transmission path is a plurality of transmission paths
- the egress terminal, the relay node, and the egress base station of each transmission path are respectively determined.
- the local terminal sends a handover request message to the egress terminal.
- the handover request message includes feature information of the local terminal.
- the local terminal completes a path switching operation according to the handover confirmation message when receiving the handover confirmation message returned by the egress terminal, or according to the handover when the local terminal receives the handover indication message returned by the serving base station. Indicates that the message completes the path switch operation.
- the local terminal directly sends a handover request message to the egress terminal; in the case where there is a relay node between the local terminal and the egress terminal, the relay node After agreeing to transit, the handover request message is sent to the egress terminal.
- the local terminal receives the handover confirmation message or the handover indication message, the relay node, the egress terminal, and the egress base station need to prepare to switch resources, and after the handover resource preparation is completed, the unsuccessfully transmitted data packet continues to be retransmitted on the selected target path. .
- the handover request message includes the feature information of the local terminal, and the feature information includes: an identity of the local terminal, an identifier of the egress terminal, and a local terminal.
- Configuration information and network configuration information, etc. the egress terminal receives the handover request message according to its own state information (for example: resource configuration information, power information, or hardware capability)
- the force information is used to determine whether the relay is allowed. If the result of the determination is yes, the egress terminal sends a handover request message including the feature information of the local terminal and/or the feature information of the egress terminal to the egress base station.
- the egress terminal If the determination result is no, the egress terminal The local terminal returns a handover reject message, and the local terminal terminates the current path handover procedure after receiving the handover rejection message.
- the egress base station determines whether to allow the handover according to its own state information (for example, resource configuration information, power information, hardware capability information, etc.). If the determination result is yes, the egress base station is local. The serving base station of the terminal sends a handover request message including the feature information of the local terminal, the feature information of the egress terminal, and/or the feature information of the egress base station.
- the egress base station If the judgment result is no, the egress base station returns a handover reject message to the local terminal through the egress terminal, local. After receiving the handover reject message, the terminal terminates the current path handover procedure. After receiving the handover request message sent by the egress base station, the serving base station determines whether to allow handover according to its own state information. If the determination result is yes, the serving base station returns to the egress base station to switch.
- the egress base station returns the handover confirmation message to the local terminal through the egress terminal, and after receiving the handover confirmation message sent by the egress terminal, the local terminal performs a path switching operation to switch the current transmission path to the target transmission path; or clothes A case where the communication link between the base station and the local terminal is not turned off, the serving base station directly transmits a handover indication message to the local terminal, the local terminal receives a handover indication message to switch the current transmission path to the target transmission path.
- the local terminal may separately broadcast a handover request message to the egress terminals corresponding to the respective transmission paths of the multiple transmission paths, or sequentially send the handover to the egress terminal corresponding to each transmission path.
- the method for switching each transmission path can be performed by referring to the foregoing description, and details are not described herein again.
- the local terminal transmits through multiple transmission paths
- a transmission ratio is allocated for each transmission path, and the local terminal transmits the data to be transmitted on multiple transmission paths according to the corresponding transmission ratio to increase the transmission throughput; or
- the local terminal encodes the data to be transmitted in different forms, and transmits the data to be transmitted in different encoding formats on multiple transmission paths to improve the reliability of the transmission.
- determining the target transmission path from the associated transmission path set includes:
- the local terminal detects a link state of a communication link with the serving base station
- a plurality of transmission paths are selected from the associated transmission path set as the target transmission path.
- the communication link between the local terminal and the serving base station is a Uu link
- the unavailable state indicates that the link quality parameter of the Uu link is less than a preset value
- the limit is In the disconnected state
- the local terminal selects a transmission link with the smallest hop count or the best link quality as the target transmission path from the associated transmission path set, the transmission path includes at least one communication link, and the hop count represents the communication link.
- the number of link quality parameters indicating the quality of the communication link, such as link quality parameters include: delay, bandwidth, and so on.
- the local terminal may also select multiple transmission paths as the target transmission path from the associated transmission path set.
- the sending, by the local terminal, the handover request message to the egress terminal includes:
- the local terminal sends the handover request message to the at least one relay node, where the at least one relay node allows relaying Forwarding the handover request message to the egress terminal by the at least one relay node.
- the local terminal determines the location and the topological connection relationship of the network node corresponding to the target transmission path, obtains the egress terminal and the egress base station corresponding to the target transmission path, and determines whether there is a relay node between the local terminal and the egress terminal, if there is a relay node
- the data transmission between the local terminal and the egress terminal must be relayed through the relay node, and the relay node is allowed to perform relaying before being sent to the egress terminal.
- the target transmission path includes: a local terminal, a relay node 1, a relay node 2, an egress terminal, and an egress base station.
- the local terminal When the local terminal needs to send a handover request message to the egress terminal, the local terminal first sends a handover request message to the relay node. 1.
- the relay node 1 determines whether to run the relay according to its own state information. If the determination result is yes, the relay node 1 forwards the handover request message to the relay node 2, and the relay node 2 receives the handover request message according to itself.
- the status information determines whether the relay is allowed, and if the determination is yes, the handover request message is forwarded to the egress terminal.
- the egress terminal needs to send a handover confirmation message to the local terminal, it also needs to be forwarded to the local terminal through the permission of the relay node 1 and the relay node 2.
- the status information of the local terminal includes: identity information of the local terminal, configuration information of the egress base station, identity information of the egress base station, identity of the local terminal, local configuration information, network configuration information, frequency, and subframe structure. One or more of them.
- the local terminal and the egress terminal are D2D terminals or TSC terminals.
- the local terminal, the egress terminal, and the relay node between the local terminal and the egress terminal The terminal type is a D2D terminal or a TSC terminal.
- each terminal constitutes an ad hoc network, and the communication link between the terminal and the terminal is a D2D link;
- each terminal is a TSC terminal, each terminal The sub-organization network is formed, and the communication link between the terminal and the terminal is an X2 link, and the UE performs network attachment through the TSC terminal.
- the local terminal determines the target transmission path from the associated transmission path set, and sends a path switching request to the egress terminal and the egress base station corresponding to the target transmission path.
- the current transmission path is switched to the target transmission path, and the local terminal can communicate with the serving base station or other base stations through the relay of other terminals, thereby improving service continuity and reliability.
- FIG. 3 is a schematic diagram of interaction of a method for switching a transmission path according to an embodiment of the present invention.
- an interaction method includes:
- the local terminal detects whether the path switching condition is met.
- the local terminal selects the target transmission path from the associated transmission path set.
- the local terminal sends a handover request message to the egress terminal.
- the egress terminal determines, according to its own status information, whether to allow relaying.
- the local terminal directly sends the handover request message to the egress terminal; in the case that there is a relay node between the local terminal and the egress terminal, the local terminal will The handover request message is sent to the relay node, and the relay node determines whether to allow the relay according to its own state information. If the determination result is yes, the handover request message is forwarded to the egress terminal, and if the judgment result is no, the relay node is to the local terminal. Returning the handover reject message, the local terminal relays the local path switching procedure after receiving the handover reject message.
- the egress terminal receives the handover request message, and determines whether to allow the relay according to the status information of the egress. If the determination result is yes, the handover request message including the feature information of the local terminal and/or the feature information of the egress terminal is sent to the egress base station, if the result is determined. If no, the handover reject message is returned to the local terminal, and the local terminal terminates the current path handover procedure after receiving the handover rejection message.
- the egress base station receives a handover request message sent by the egress terminal.
- the egress base station determines, according to its own state information, whether to allow handover.
- the egress base station sends a handover request message to the serving base station, where the handover request message includes the feature information of the local terminal, the feature information of the egress terminal, and/or the feature of the egress base station. If the judgment result is no, the egress base station returns a handover reject message to the egress terminal, and the egress terminal forwards the handover rejection message to the local terminal, and the local terminal terminates the current path handover procedure after receiving the handover rejection message.
- the egress base station sends a handover request message to the serving base station.
- the serving base station determines, according to its own state information, whether to allow handover.
- the serving base station if the determination result is yes, the serving base station returns a handover confirm message to the egress base station. If the judgment result is no, the serving base station returns a handover reject message to the egress base station, and the serving base station sends a handover reject message to the local terminal.
- the serving base station may directly return an acknowledgement message or a handover reject message to the local terminal.
- the serving base station sends a handover confirmation message to the egress base station.
- the egress base station returns a handover confirmation message to the egress terminal.
- the egress terminal returns a handover confirmation message to the local terminal.
- the handover confirmation message needs to be forwarded to the local terminal by relaying the relay node.
- the local terminal determines the target transmission path from the associated transmission path set, and sends a path switching request to the egress terminal and the egress base station corresponding to the target transmission path.
- the current transmission path is switched to the target transmission path, and the local terminal can communicate with the serving base station or other base stations through the relay of other terminals, thereby improving service continuity and reliability.
- FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- the terminal in the embodiment of the present invention is used to perform a method for switching a transmission path in FIG. 2, and the terminology and process involved may be implemented by referring to FIG. 2 .
- the terminal 4 includes a first determining module 401, a second determining module 402, a sending module 403, and a path switching module 404.
- the first determining module 401 is configured to determine the target transmission path from the set of associated transmission paths when the preset path switching condition is met.
- the second determining module 402 is configured to determine an egress terminal and an egress base station corresponding to the target transmission path.
- the sending module 403 is configured to send a handover request message to the egress terminal;
- the information includes the feature information of the terminal.
- the switching execution module 404 is configured to: when receiving the handover confirmation message returned by the egress terminal, complete the path switching operation according to the handover confirmation message; or
- the path switching operation is completed according to the handover indication message.
- the first determining module 401 includes:
- a detecting unit configured to detect a link state of a communication link with the serving base station
- a selecting unit configured to select, as the target transmission path, a transmission path with a minimum hop count or an optimal link quality from the associated transmission path set if the link state of the communication link is unavailable;
- a plurality of transmission paths are selected from the associated transmission path set as the target transmission path.
- the sending module 403 is configured to:
- the terminal and the egress terminal are D2D terminals or TSC terminals.
- FIG. 5 is a schematic diagram of another structure of a terminal according to an embodiment of the present invention.
- the terminal 5 includes a processor 501, a memory 502, and a transceiver 403.
- the transceiver 503 is configured to transmit and receive data with and from an external device.
- the number of processors 501 in the terminal 5 may be one or more.
- processor 501, memory 502, and transceiver 503 may be coupled by a bus system or other means.
- the processor 501 may be a CPU
- the memory 502 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
- Terminal 5 can be used to perform the method shown in FIG. 2.
- the meaning and examples of the terms involved in the embodiment reference may be made to the corresponding embodiment of FIG. 2. I will not repeat them here.
- the program code is stored in the memory 502.
- the processor 501 is configured to call the program code stored in the memory 502 for performing the following operations:
- the target transmission path is determined from the set of associated transmission paths;
- the handover request message includes feature information of the terminal
- the local terminal When the local terminal receives the handover indication that is returned by the serving base station, the local terminal completes the path switching operation according to the handover indication message.
- the processor 501 performs the determining, when the preset path switching condition is met, determining the target transmission path from the set of associated transmission paths, including:
- a plurality of transmission paths are selected from the associated transmission path set as the target transmission path.
- the performing, by the processor 501, the sending the handover request message to the egress terminal includes:
- the local terminal and the egress terminal are D2D terminals or TSC terminals.
- the terminal provided by the embodiment of the present invention includes but is not limited to piggybacking Or terminals of other operating systems, such as mobile phones.
- Other terminals may also be used, such as a laptop or tablet or desktop computer with a touch-sensitive surface (eg, a touch screen display and/or a touch pad).
- a terminal device including a display and a touch-sensitive surface is described. It should be understood, however, that the terminal device can include one or more other physical user interface devices, such as a physical keyboard, mouse, and/or joystick.
- Terminal devices typically support a variety of applications, such as one or more of the following: a drawing application, a rendering application, a word processing application, a web page creation application, a disk editing application, a spreadsheet application, a gaming application. , phone applications, video conferencing applications, electronics Mail application, instant messaging application, exercise support application, photo management application, digital camera application, digital video camera application, web browsing application, digital music player application, and/or digital video player application program.
- applications such as one or more of the following: a drawing application, a rendering application, a word processing application, a web page creation application, a disk editing application, a spreadsheet application, a gaming application.
- phone applications video conferencing applications, electronics Mail application, instant messaging application, exercise support application, photo management application, digital camera application, digital video camera application, web browsing application, digital music player application, and/or digital video player application program.
- Various applications that can be executed on the terminal device can use at least one shared physical user interface device, such as a touch-sensitive surface.
- One or more functions of the touch-sensitive surface and corresponding information displayed on the terminal device may be adjusted and/or changed from one application to the next and/or adjusted and/or changed within the corresponding application .
- the shared physical architecture of the terminal device such as a touch-sensitive surface, can support various applications with a user interface that is intuitive to the user.
- 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传输路径的切换方法，包括：当本地终端满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；本地终端确定目标传输路径对应的出口终端和出口基站；本地终端向出口终端发送切换请求消息；切换请求消息包括本地终端的特征信息；本地终端接收到出口终端返回的切换确认消息时，根据切换确认消息完成路径切换操作；或本地终端接收到服务基站返回的切换指示消时，根据切换指示消息完成路径切换操作。本发明实施例还公开了一种终端和通信系统。采用本发明，能提供业务的连续性和可靠性。
Description
本申请要求于2016年2月3日提交中国专利局，申请号为201610078443.1、发明名称为“一种传输路径的切换方法、终端和系统”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。
本发明涉及通信领域，尤其涉及一种传输路径的切换方法、终端和系统。
现有的用户设备的移动性管理方法为：用户设备与服务基站进行数据传输的过程中，用户设备或服务基站发现当前的Uu链路不满足传输需求，确定需要进行基站切换的情况下，用户设备或服务基站触发小区切换流程，用户设备将当前的服务基站切换到Uu链路质量更好的基站上。然而，随着用户数量的增长，部署的基站的密度越来越大，同时每个基站的小区覆盖范围也相应的缩小，当用户设备移动时需要频繁的进行小区切换，导致业务的连续性得不到保证。
发明内容
本发明实施例所要解决的技术问题在于，提供一种传输路径的切换方法。可提高业务的连续性和可靠性。
为了解决上述技术问题，本发明实施例提供了一种传输路径的切换方法，包括：当本地终端满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；所述本地终端确定所述目标传输路径对应的出口终端和出口基站；所述本地终端向所述出口终端发送切换请求消息；所述切换请求消息包括所述本地终端的特征信息；所述本地终端接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或所述本地终端接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
相应地，本发明实施例还提供了一种终端，包括：第一确定模块，设置为当满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；第二确定模块，设置为确定所述目标传输路径对应的出口终端和出口基站；发
送模块，设置为向所述出口终端发送切换请求消息；所述切换请求消息包括所述终端的特征信息；切换执行模块，设置为接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
相应的，本发明实施例提供了一种通信系统包括：本地终端、出口终端和出口基站；当所述本地终端满足预设的路径切换条件时，所述本地终端从关联的传输路径集合中确定目标传输路径；所述本地终端确定所述目标传输路径对应的所述出口终端和所述出口基站；所述本地终端向所述出口终端发送第一切换请求消息；所述切换请求消息包括所述本地终端的特征信息；所述出口终端接收所述第一切换请求消息，所述出口终端根据自身状态信息判断是否允许中继；若判断结果为是，所述出口终端向所述出口基站发送包括所述本地终端的特征信息和/或所述出口基站的特征信息的第二切换请求消息；所述出口基站接收所述第二切换请求消息，所述服务基站判断是否允许路径切换；若判断结果为是，所述出口基站向所述本地终端的服务基站发送包括本地终端的特征信息、出口终端的特征信息和所述出口基站的特征信息中一种或多种的第三切换请求消息；所述服务基站接收所述第三路径切换请求，所述服务基站判断是否允许切换；若判断结果为是，所述服务基站向所述本地终端返回包括连接参数的切换指示消息；所述本地终端接收所述切换指示消息，所述本地终端根据所述连接参数完成路径切换操作；或所述服务基站向所述出口基站返回切换确认消息；所述出口基站经由所述出口终端向所述本地终端返回所述切换确认消息；所述本地终端接收所述出口终端返回的切换确认消息，并根据所述切换确认消息完成路径切换操作。
实施本发明实施例，具有如下有益效果：本地终端在当前的传输链路无法满足传输需求时，从关联的传输路径集合中确定目标传输路径，通过向目标传输路径对应的出口终端和出口基站发送路径切换请求，以完成路径切换操作，将当前的传输路径切换到目标传输路径上，本地终端可通过其他终端的中继与服务基站或其他基站进行通信，提高业务的连续性和可靠性。
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是本发明实施例提供的一种通信系统的结构示意图；
图2是本发明实施例提供的一种传输路径的切换方法的流程示意图；
图3是本发明实施例提供的一种传输路径的切换方法的交互示意图；
图4是本发明实施例提供的一种终端的结构示意图；
图5是本发明实施例提供的一种终端的另一结构示意图。
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。
为本发明实施例提供的一种通信系统的结构示意图，通信系统包括多个基站和多个终端，多个终端形成自组织网络，终端与终端之间可直接进行通信，终端可以是D2D终端或TSC终端。本地终端满足预设路径切换条件时，本地终端从关联的传输路径集合中确定目标传输路径，本地终端确定目标传输路径对应的出口基站，出口基站可以是本地终端的服务基站或传输路径上对应的其他终端的服务基站，本地终端向出口基站发送第一切换请求消息，本地终端根据自身状态信息判断是否允许中继，若判断结果为是，出口终端向出口基站发送包括本地终端和出口终端的特征信息的第二切换请求消息，出口基站接收第二切换请求消息，出口基站根据自身状态信息判断是否允许路径切换，若判断结果为是，出口基站向本地终端的服务基站发送包括本地终端的特征信息、出口终端的特征信息和出口基站的特征信息中一种或多种的第三切换请求消息，服务基站接收第三切换请求消息，判断是否允许切换，若判断结果为是，服务基站向本地终端返回包括连接参数的切换指示消息，本地终端接收切换指示消息，本地终端根据连接参数执行路径切换操作；或服务基站通过出口基站和出口终端向本地终端返回切换确认消息，本地终端接收切换确认消息，执行路径切换操作。
以图1的通信系统为例，通信系统包括3个基站：基站10、基站11、基站12，4个终端：UE1、UE2、UE3和UE4，UE1为本地终端，以上行方向为例，UE1关联的传输路径集合中包含4条传输路径，传输路径1：UE1→基站10、传输路径2：UE1→UE2→基站10，传输路径3：UE1→UE3→基站11，传输路径4：UE1→UE3→UE4→基站11，假设UE1当前使用传输路径1进行数据传输，在数据传输的过程中，UE1发现传输路径1的链路状态为不可用状态，UE1获取关联的传输路径集合，UE1从关联的传输路径集合中选择一条或多条传输路径，假设UE1选择传输路径2作为目标传输路径，UE确定传输路径2中的出口终端为UE2，出口基站为基站10，UE1向UE2发送第一切换请求消息，根据上述的处理方法完成路径切换流程，此处不再赘述；假设UE1选择的目标传输路径为传输路径3，UE1确定传输路径4为目标传输路径，根据目标传输路径中各节点的位置和拓扑连接关系确定出口终端为UE4，出口基站为基站12，中继节点为UE3，UE1向UE3发送第一切换请求消息，UE3允许中继后将第一切换请求消息转发给出口终端，根据上述的处理方法完成路径切换流程，此处不再赘述；当UE1选择的目标传输路径为多条传输路径时，可以采用广播的方式或分别发送的方式向每条传输路径对应的出口终端发送第一切换请求消息。
从上述实施例可以看出，本地终端在当前的传输链路无法满足传输需求时，从关联的传输路径集合中确定目标传输路径，通过向目标传输路径对应的出口终端和出口基站发送路径切换请求，以完成路径切换操作，将当前的传输路径切换到目标传输路径上，本地终端可通过其他终端的中继与服务基站或其他基站进行通信，提高业务的连续性和可靠性。
参见图2，为本发明实施例提供的一种传输路径的切换方法的流程示意图，在本发明实施例中，所述方法包括：
S101、当本地终端满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径。
具体的，传输路径集合表示本地终端当前可用的所有的传输路径的集合，传输路径包括至少一条通信链路，通信链路表示两个网络节点之间的数据传输通道，可以是无线或有线的。本地终端在通过当前的一条或多条传输路径进行数据传输的过程中，本地终端发现当前的传输路径无法满足正常的数据传输时，例如，当前的传输路径中某个通信链路为不可用状态，本地终端通过预设的与
本地终端关联的传输路径集合中确定目标传输路径，本地终端从传输路径集合中确定的目标传输路径的数量可以是一条或多条。
可以理解的是，确定的目标传输路径不包括不可用状态的传输路径，本地终端实时的更新关联的传输路径集合，确保传输路径集合中的传输路径均为可用的传输路径，传输路径集合的更新方法本发明不作限制，可用由本地终端进行更新维护或设置一个单独的网络节点进行更新维护。
S102、所述本地终端确定所述目标传输路径对应的出口终端和出口基站。
具体的，每条传输路径只对应一个基站，该基站即为出口基站，出口基站可以是本地终端的服务基站或传输路径上对应的其他终端的服务基站，与出口基站之间的跳数为1的终端为出口终端，中继节点表示本地终端与出口终端之间用于中继传输的节点，中继节点可以是终端、基站、或其他网络设备，例如：如果本地终端和出口终端之前还存在至少一个终端，则这些终端成为中继节点。本地终端根据目标传输路径中的各个网络节点的位置和拓扑连接关系，确定出口终端、出口基站和中继节点。在目标传输路径为多条传输路径的情况下，分别确定每条传输路径的出口终端、中继节点和出口基站。
S103、所述本地终端向所述出口终端发送切换请求消息；所述切换请求消息包括所述本地终端的特征信息。
S104、所述本地终端接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或所述本地终端接收到服务基站返回的切换指示消息时，根据所述切换指示消息完成路径切换操作。
具体的，在本地终端和出口终端之间不存在中继节点的情况下，本地终端直接向出口终端发送切换请求消息；在本地终端和出口终端之间存在中继节点的情况下，中继节点同意中转后将切换请求消息发送给出口终端。本地终端接收到切换确认消息或切换指示消息时，中继节点，出口终端、出口基站需要准备切换资源，在切换资源准备完成后，将未发送成功的数据包继续在选择的目标路径上重新发送。
下面对目标路径为一个传输路径的情况下，对路径切换流程进行说明：切换请求消息中包括本地终端的特征信息，特征信息包括：本地终端的身份标识、出口终端的标识符、本地终端的配置信息和网络配置信息等，出口终端接收切换请求消息，根据自身的状态信息(例如：资源配置信息、电量信息或硬件能
力信息)判断是否允许中继，若判断结果为是，出口终端向出口基站发送包括本地终端的特征信息和/或出口终端的特征信息的的切换请求消息，若判断结果为否，出口终端向本地终端返回切换拒绝消息，本地终端接收到切换拒绝消息后终止本次路径切换流程。出口基站在接收出口终端发送的切换请求消息时，出口基站根据自身的状态信息(例如：资源配置信息、电量信息或硬件能力信息等)判断是否允许切换，若判断结果为是，出口基站向本地终端的服务基站发送包括本地终端的特征信息、出口终端的特征信息和/或出口基站的特征信息的切换请求消息，若判断结果为否，出口基站通过出口终端向本地终端返回切换拒绝消息，本地终端接收到切换拒绝消息后终止本次路径切换流程；服务基站接收到出口基站发送的切换请求消息后，根据自身的状态信息判断是否允许切换，若判断结果为是，服务基站向出口基站返回切换确认消息，出口基站将切换确认消息通过出口终端返回给本地终端，本地终端接收到出口终端发送的切换确认消息后，进行路径切换操作，将当前的传输路径切换到目标传输路径上；或，在服务基站和本地终端之间的通信链路没有断开的情况下，服务基站直接向本地终端发送切换指示消息，本地终端接收切换指示消息，将当前的传输路径切换到目标传输路径上。
需要说明的是，当目标传输路径为多条传输路径时，本地终端可以分别向多条传输路径中各个传输路径对应的出口终端广播切换请求消息，或依次向各个传输路径对应的出口终端发送切换请求消息，每条传输路径的切换方法可参照上述描述执行，此处不再赘述。另外，本地终端通过多条传输路径进行传输时，为每条传输路径分配传输比例，本地终端将待传输的数据根据对应的传输比例在多条传输路径上传输，以增加传输的吞吐量；或者，本地终端将待传输的数据进行不同形式的编码，在多条传输路径上传输不同编码格式的待传输数据，以提高传输的可靠性。
可选的，所述本地终端满足预设路径切换条件时，从关联的传输路径集合中确定目标传输路径包括：
本地终端检测到与服务基站之间的通信链路的链路状态；
若所述通信链路的链路状态为不可用状态，从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输路径作为目标传输路径；或
从关联的传输路径集合中选择多条传输路径作为目标传输路径。
具体的，本地终端与服务基站之间的通信链路为Uu链路，本地终端检测到Uu链路为不可用状态时，不可用状态表示Uu链路为链路质量参数小于预设值，极限情况为断开状态，本地终端从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输链路作为目标传输路径，传输路径包括至少一条通信链路，跳数表示通信链路的数量，链路质量参数表示通信链路的状态优劣的参数，例如链路质量参数包括：时延、带宽等。本地终端也可以从关联的传输路径集合中选择多条传输路径作为目标传输路径。
可选的，所述本地终端向所述出口终端发送切换请求消息包括：
若所述目标传输路径上存在至少一个中继节点，所述本地终端将所述切换请求消息发送给所述至少一个中继节点，在所述至少一个中继节点均允许进行中继的情况下将所述切换请求消息通过所述至少一个中继节点转发给所述出口终端。
具体的，本地终端确定目标传输路径对应网络节点的位置和拓扑连接关系，得到目标传输路径对应的出口终端和出口基站，判断本地终端和出口终端之间是否存在中继节点，如果存在中继节点，本地终端和出口终端之间的数据传输都必须经过中继节点进行中继，中继节点允许进行中继的情况下，才能发送给出口终端。
例如，目标传输路径包括：本地终端、中继节点1、中继节点2、出口终端和出口基站，本地终端需要向出口终端发送切换请求消息时，本地终端首先将切换请求消息发送给中继节点1，中继节点1根据自身的状态信息判断是否运行中继，如果判断结果为是，中继节点1将切换请求消息转发给中继节点2，中继节点2接收该切换请求消息，根据自身的状态信息判断是否允许中继，如果判断结果为是，将切换请求消息转发给出口终端。同样的，出口终端需要向本地终端发送切换确认消息时，也需要通过中继节点1和中继节点2的允许才能转发给本地终端。
可选的，所述本地终端的状态信息包括：本地终端的身份信息、出口基站的配置信息、出口基站的身份信息、本地终端的身份标识、本地配置信息、网络配置信息、频率、子帧结构中的一种或多种。
所述本地终端和所述出口终端为D2D终端或TSC终端。
具体的，本地终端、出口终端以及本地终端和出口终端之间的中继节点的
终端类型为D2D终端或TSC终端，在终端为D2D终端的情况下，各个终端组成自组织网络，终端与终端之间的通信链路为D2D链路；在终端为TSC终端的情况下，各个终端组成子组织网络，终端与终端之间的通信链路为X2链路，UE通过TSC终端进行网络附着。
从上述实施例可以看出，本地终端在当前的传输链路无法满足传输需求时，从关联的传输路径集合中确定目标传输路径，通过向目标传输路径对应的出口终端和出口基站发送路径切换请求，以完成路径切换操作，将当前的传输路径切换到目标传输路径上，本地终端可通过其他终端的中继与服务基站或其他基站进行通信，提高业务的连续性和可靠性。
参见图3，为本发明实施例提供的一种传输路径切换方法的交互示意图，在本发明实施例中，交互方法包括：
S301、本地终端检测是否满足路径切换条件。
S302、在S301的检测结果为是的情况下，本地终端从关联的传输路径集合中选择目标传输路径。
S303、本地终端向出口终端发送切换请求消息。
S304、出口终端根据自身的状态信息判断是否允许中继。
具体的，在本地终端与出口终端之间没有中继节点的情况下，本地终端直接将切换请求消息发送给出口终端；在本地终端与出口终端之间具有中继节点的情况下，本地终端将切换请求消息发送给中继节点，中继节点根据自身的状态信息判断是否允许中继，如果判断结果为是，将切换请求消息转发给出口终端，如果判断结果为否，中继节点向本地终端返回切换拒绝消息，本地终端接收切换拒绝消息后中继本地路径切换流程。出口终端接收切换请求消息，根据自身的状态信息判断是否允许中继，若判断结果为是，向出口基站发送包括本地终端的特征信息和/或出口终端的特征信息的切换请求消息，若判断结果为否，向本地终端返回切换拒绝消息，本地终端接收到切换拒绝消息后终止本次路径切换流程。
S305、出口基站接收出口终端发送的切换请求消息。
S306、出口基站根据自身的状态信息判断是否允许切换。
具体的，若判断结果为是，出口基站向服务基站发送切换请求消息，切换请求消息包括本地终端的特征信息、出口终端的特征信息和/或出口基站的特征
信息；若判断结果为否，出口基站向出口终端返回切换拒绝消息，出口终端将切换拒绝消息转发给本地终端，本地终端接收到切换拒绝消息后终止本次的路径切换流程。
S307、出口基站向服务基站发送切换请求消息。
S308、服务基站根据自身的状态信息判断是否允许切换。
具体的，若判断结果为是，服务基站向出口基站返回切换确认消息，若判断结果为否，服务基站向出口基站返回切换拒绝消息，由服务基站将切换拒绝消息发送给本地终端。
其中，服务基站与本地终端中间的通信链路没有断开的情况下，服务基站此时可直接向本地终端返回确认指示消息或切换拒绝消息。
S309、服务基站向出口基站发送切换确认消息。
S310、出口基站向出口终端返回切换确认消息。
S311、出口终端向本地终端返回切换确认消息。
其中，如果出口终端和本地终端中间存在中继节点，切换确认消息需要通过中继节点的中转而转发给本地终端。
S312、本地终端接收到切换确认消息后，执行切换操作。
从上述实施例可以看出，本地终端在当前的传输链路无法满足传输需求时，从关联的传输路径集合中确定目标传输路径，通过向目标传输路径对应的出口终端和出口基站发送路径切换请求，以完成路径切换操作，将当前的传输路径切换到目标传输路径上，本地终端可通过其他终端的中继与服务基站或其他基站进行通信，提高业务的连续性和可靠性。
参见图4，为本发明实施例提供的一种终端的结构示意图，本发明实施例的终端用于执行图2中的一种传输路径的切换方法，所涉及的术语和过程可参照图2实施例的描述。终端4包括：第一确定模块401、第二确定模块402、发送模块403和路径切换模块404。
第一确定模块401，设置为当满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径。
第二确定模块402，设置为确定所述目标传输路径对应的出口终端和出口基站。
发送模块403，设置为向所述出口终端发送切换请求消息；所述切换请求消
息包括所述终端的特征信息。
切换执行模块404，设置为接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或
接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
进一步，可选的，第一确定模块401包括：
检测单元，设置为检测到与服务基站之间的通信链路的链路状态；
选择单元，设置为若所述通信链路的链路状态为不可用状态，从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输路径作为目标传输路径；或
从关联的传输路径集合中选择多条传输路径作为目标传输路径。
可选的，发送模块403设置为：
若所述终端与所述出口终端之间存在至少一个中继节点，将所述切换请求消息发送给所述至少一个中继节点，在所述至少一个中继节点均允许进行中继的情况下，由所述至少一个中继节点将所述切换请求消息转发给所述出口终端。
可选的，所述终端和所述出口终端为D2D终端或TSC终端。
本发明实施例和图2的方法实施例基于同一构思，其带来的技术效果也相同，具体过程可参照方法实施例一的描述，此处不再赘述。
参见图5，为本发明实施例提供的一种终端的另一结构示意图，在本发明实施例中，终端5包括处理器501、存储器502和收发器403。收发器503用于与外部设备之间收发数据。终端5中的处理器501的数量可以是一个或多个。本发明的一些实施例中，处理器501、存储器502和收发器503可通过总线系统或其他方式连接。所述处理器501可以是CPU，所述存储器502可以是高速RAM存储器，也可以是非不稳定的存储器(non-volatile memory)，例如至少一个磁盘存储器。终端5可以用于执行图2所示的方法。关于本实施例涉及的术语的含义以及举例，可以参考图2对应的实施例。此处不再赘述。
其中，存储器502中存储程序代码。处理器501用于调用存储器502中存储的程序代码，用于执行以下操作：
当满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；
确定所述目标传输路径对应的出口终端和出口基站；
向所述出口终端发送切换请求消息；所述切换请求消息包括所述终端的特征信息；
接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或
所述本地终端接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
在本发明的一些实施例中，处理器501执行所述当满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径包括：
检测到与服务基站之间的通信链路的链路状态；
若所述通信链路的链路状态为不可用状态，从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输路径作为目标传输路径；或
从关联的传输路径集合中选择多条传输路径作为目标传输路径。
在本发明的一些实施例中，处理器501执行所述向所述出口终端发送切换请求消息包括：
若所述终端与所述出口终端之间存在至少一个中继节点，将所述切换请求消息发送给所述至少一个中继节点，在所述至少一个中继节点均允许进行中继的情况下，由所述至少一个中继节点将所述切换请求消息转发给所述出口终端。
在本发明的一些实施例中，所述本地终端和所述出口终端为D2D终端或TSC终端。
本发明实施例提供的终端包括但不限于搭载
或者其它操作系统的终端，诸如移动电话。也可以是其它终端，诸如具有触敏表面(例如，触摸屏显示器和/或触控板)的膝上型计算机或平板电脑或台式计算机。
在下面的讨论中，介绍了一种包括显示器和触敏表面的终端设备。然而应当理解，终端设备可以包括一个或多个其他物理用户接口设备，诸如物理键盘、鼠标和/或操作杆。
终端设备通常支持多种应用程序，诸如以下中的一种或多种：画图应用程序、呈现应用程序、文字处理应用程序、网页创建应用程序、盘编辑应用程序、电子表格应用程序、游戏应用程序、电话应用程序、视频会议应用程序、电子
邮件应用程序、即时消息应用程序、锻炼支持应用程序、相片管理应用程序、数字相机应用程序、数字视频摄像机应用程序、网络浏览应用程序、数字音乐播放器应用程序、和/或数字视频播放器应用程序。
可在终端设备上执行的各种应用程序可使用至少一个共用的物理用户接口设备，诸如触敏表面。触敏表面的一种或多种功能以及显示在终端设备上的相应信息可从一种应用程序调整和/或变化至下一种应用程序和/或在相应应用程序内被调整和/或变化。这样，终端设备的共用物理架构(诸如触敏表面)可利用对于用户而言直观清楚的用户界面来支持各种应用程序。
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，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
Claims (12)
- 一种传输路径的切换方法，其特征在于，包括：当本地终端满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；所述本地终端确定所述目标传输路径对应的出口终端和出口基站；所述本地终端向所述出口终端发送切换请求消息；所述切换请求消息包括所述本地终端的特征信息；所述本地终端接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或所述本地终端接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
- 如权利要求1所述的方法，其特征在于，所述当本地终端满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径包括：本地终端检测到与服务基站之间的通信链路的链路状态；若所述通信链路的链路状态为不可用状态，从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输路径作为目标传输路径；或从关联的传输路径集合中选择多条传输路径作为目标传输路径。
- 如权利要求1所述的方法，其特征在于，所述本地终端向所述出口终端发送切换请求消息包括：若所述本地终端与所述出口终端之间存在至少一个中继节点，所述本地终端将所述切换请求消息发送给所述至少一个中继节点，在所述至少一个中继节点均允许进行中继的情况下，由所述至少一个中继节点将所述切换请求消息转发给所述出口终端。
- 如权利要求1-3任意一项所述的方法，其特征在于，所述本地终端和所述出口终端为D2D终端或TSC终端。
- 一种传输路径的切换方法，其特征在于，包括：当本地终端满足预设的路径切换条件时，所述本地终端从关联的传输路径集合中确定目标传输路径；所述本地终端确定所述目标传输路径对应的出口终端和出口基站；所述本地终端向所述出口终端发送第一切换请求消息；所述切换请求消息 包括所述本地终端的特征信息；所述出口终端接收所述第一切换请求消息，所述出口终端根据自身状态信息判断是否允许中继；若判断结果为是，所述出口终端向所述出口基站发送包括所述本地终端的特征信息和/或所述出口终端的特征信息的第二切换请求消息；所述出口基站接收所述第二切换请求消息，所述出口基站判断是否允许路径切换；若判断结果为是，所述出口基站向所述本地终端的服务基站发送包括本地终端的特征信息、出口终端的特征信息和所述出口基站的特征信息中一种或多种的第三切换请求消息；所述服务基站接收所述第三路径切换请求，所述服务基站判断是否允许切换；若判断结果为是，所述服务基站向所述本地终端返回包括连接参数的切换指示消息；所述本地终端接收所述切换指示消息，所述本地基站根据所述连接参数完成路径切换操作；或所述服务基站向所述出口基站返回切换确认消息；所述出口基站经由所述出口终端向所述本地终端返回所述切换确认消息；所述本地终端接收所述出口终端返回的切换确认消息，并根据所述切换确认消息完成路径切换操作。
- 如权利要求5所述的方法，其特征在于，还包括：若所述出口终端根据自身状态信息判断不允许中继，所述出口终端向所述本地终端返回切换拒绝消息；或若所述出口基站根据自身状态信息判断不允许切换，所述出口基站经过所述出口基站向所述本地终端返回切换拒绝消息；或若所述服务基站不允许切换，向所述出口基站返回切换拒绝消息，所述出口基站经过所述出口基站向所述本地终端返回切换拒绝消息；或若所述服务基站不允许切换，所述服务基站向所述本地终端返回切换拒绝消息；所述本地终端接收到切换拒绝消息后中止本次路径切换流程。
- 一种终端，其特征在于，包括：第一确定模块，设置为当满足预设的路径切换条件时，从关联的传输路径集合中确定目标传输路径；第二确定模块，设置为确定所述目标传输路径对应的出口终端和出口基站；发送模块，设置为向所述出口终端发送切换请求消息；所述切换请求消息包括所述终端的特征信息；切换执行模块，设置为接收到所述出口终端返回的切换确认消息时，根据所述切换确认消息完成路径切换操作；或接收到服务基站返回的切换指示消时，根据所述切换指示消息完成路径切换操作。
- 如权利要求7所述的终端，其特征在于，所述第一确定模块包括：检测单元，设置为检测到与服务基站之间的通信链路的链路状态；选择单元，设置为若所述通信链路的链路状态为不可用状态，从关联的传输路径集合中选择跳数最小或链路质量最优的一条传输路径作为目标传输路径；或从关联的传输路径集合中选择多条传输路径作为目标传输路径。
- 如权利要求7所述的终端，其特征在于，所述发送模块设置为：若所述终端与所述出口终端之间存在至少一个中继节点，将所述切换请求消息发送给所述至少一个中继节点，在所述至少一个中继节点均允许进行中继的情况下，由所述至少一个中继节点将所述切换请求消息转发给所述出口终端。
- 如权利要求7-9任意一项所述的终端，其特征在于，所述终端和所述出口终端为D2D终端或TSC终端。
- 一种通信系统，其特征在于，包括：本地终端、出口终端和出口基站；当所述本地终端满足预设的路径切换条件时，所述本地终端从关联的传输路径集合中确定目标传输路径；所述本地终端确定所述目标传输路径对应的所述出口终端和所述出口基站；所述本地终端向所述出口终端发送第一切换请求消息；所述切换请求消息包括所述本地终端的特征信息；所述出口终端接收所述第一切换请求消息，所述出口终端根据自身状态信 息判断是否允许中继；若判断结果为是，所述出口终端向所述出口基站发送包括所述本地终端的特征信息和/或所述出口终端的特征信息的第二切换请求消息；所述出口基站接收所述第二切换请求消息，所述出口基站判断是否允许路径切换；若判断结果为是，所述出口基站向所述本地终端的服务基站发送包括本地终端的特征信息、出口终端的特征信息和所述出口基站的特征信息中一种或多种的第三切换请求消息；所述服务基站接收所述第三路径切换请求，所述服务基站判断是否允许切换；若判断结果为是，所述服务基站向所述本地终端返回包括连接参数的切换指示消息；所述本地终端接收所述切换指示消息，所述本地终端根据所述连接参数完成路径切换操作；或所述服务基站向所述出口基站返回切换确认消息；所述出口基站经由所述出口终端向所述本地终端返回所述切换确认消息；所述本地终端接收所述出口终端返回的切换确认消息，并根据所述切换确认消息完成路径切换操作。
- 如权利要求11所述的系统，其特征在于，若所述出口终端根据自身状态信息判断不允许中继，所述出口终端向所述本地终端返回切换拒绝消息；或若所述出口基站根据自身状态信息判断不允许切换，所述出口基站经过所述出口基站向所述本地终端返回切换拒绝消息；或若所述服务基站不允许切换，所述服务基站向所述出口基站返回切换拒绝消息，所述出口基站经过所述出口终端向所述本地终端返回切换拒绝消息；或若所述服务基站不允许切换，所述服务基站向所述本地终端返回切换拒绝消息所述本地终端接收到切换拒绝消息后中止本次路径切换流程。
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