WO2015124104A1

WO2015124104A1 - Path establishment method, device and system and core network device

Info

Publication number: WO2015124104A1
Application number: PCT/CN2015/073129
Authority: WO
Inventors: 周燕飞
Original assignee: 电信科学技术研究院
Priority date: 2014-02-20
Filing date: 2015-02-15
Publication date: 2015-08-27
Also published as: CN104869659A; CN104869659B

Abstract

A path establishment method, device and system and a core network device, used for establishing a communication path in a scenario that two UEs perform direct communication through two eNBs. A path establishment method provided in the present invention comprises: a core network device determining that a first base station that a first UE resides in and a second base station that a second UE resides in can establish a communication link; and the core network device initiating establishment of a direct communication path between the first UE and the second UE through the first base station and the second base station.

Description

一种路径建立方法、设备及***、核心网设备Path establishing method, device and system, core network device

本申请要求在2014年2月20日提交中华人民共和国知识产权局、申请号为201410058859.8、发明名称为“一种路径建立方法、设备及***、核心网设备”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。This application claims the priority of the Chinese patent application submitted to the Intellectual Property Office of the People's Republic of China on February 20, 2014, with the application number 201410058859.8, and the invention name is “a path establishment method, equipment and system, core network equipment”. The entire contents are incorporated herein by reference.

技术领域Technical field

本发明涉及通信技术领域，尤其涉及一种路径建立方法、设备及***、核心网设备。The present invention relates to the field of communications technologies, and in particular, to a path establishment method, device and system, and core network device.

背景技术Background technique

邻近通信中的一种场景是两个用户设备(User Equipment，UE)通过一个或多个演进型基站(evolved NodeB，eNB)进行直接通信。One scenario in the proximity communication is that two User Equipments (UEs) perform direct communication through one or more evolved NodeBs (eNBs).

现有协议定义的两个UE间在通信时，其数据通道如图1所示，UE 1将数据发送到服务的eNB1，而eNB1会将数据传递到UE1的服务的核心网设备：服务网关(Serving GW)和分组数据网络网关(Packet Data Network Gateway，PGW)。PGW会根据UE的路由表将数据路由到UE2的服务PGW和Serving GW，UE2的服务Serving GW将数据传递到UE2的服务eNB2，再通过eNB2传递给UE2。图1中所示的例子是当UE1和UE2的服务Serving GW和PGW相同时的场景，此时省略了为UE1服务的PGW将数据路由到为UE2服务的PGW的过程。When two UEs defined by the existing protocol are communicating, their data channels are as shown in FIG. 1. The UE 1 transmits data to the serving eNB1, and the eNB1 transmits the data to the core network device of the UE1 service: the serving gateway ( Serving GW) and Packet Data Network Gateway (PGW). The PGW will route the data to the serving PGW and the Serving GW of the UE2 according to the routing table of the UE. The Serving GW of the UE2 transmits the data to the serving eNB2 of the UE2, and then transmits the data to the UE2 through the eNB2. The example shown in FIG. 1 is a scenario when the Serving GW and the PGW of the UE1 and the UE2 are the same, and the process of routing the data to the PGW serving the UE2 by the PGW serving the UE1 is omitted.

由图1所示可以看出，即使通信的两个UE之间的距离非常近，通信数据也需要通过各自的服务eNB以及核心网才能到达对端。而邻近通信技术正在研究当通信双方满足一定条件时(如距离很近)，两个UE之间的直接通信或者仅经由eNB的直接通信，其数据传输路径如图1a和图1b所示。As can be seen from FIG. 1, even if the distance between the two UEs communicating is very close, the communication data needs to reach the opposite end through the respective serving eNB and the core network. The proximity communication technology is studying when the communication parties satisfy certain conditions (such as close proximity), direct communication between two UEs or direct communication only via the eNB, and the data transmission path thereof is as shown in FIG. 1a and FIG. 1b.

图1a和图1b所示为实现邻近通信后UE之间的数据传输路径图。UE1和UE2可以不需要经过移动网络设备直接传输数据，或者通过同一个eNB转发数据而不需要经过核心网。这种传输方式可以减少数据传输延时，并且可以节省网络的资源，特别是核心网的网络资源。FIG. 1a and FIG. 1b are diagrams showing data transmission paths between UEs after implementing proximity communication. UE1 and UE2 may not need to directly transmit data through the mobile network device, or forward data through the same eNB without going through the core network. This transmission method can reduce the data transmission delay and save network resources, especially the network resources of the core network.

除了上述两种路由路径外，满足邻近通信条件的UE还可以通过两个eNB进行直接通信，如图3所示，UE1和UE2之间的邻近通信数据分别经过eNB1和eNB2传输，无需经过核心网。In addition to the above two routing paths, a UE that satisfies the neighboring communication condition can also perform direct communication through two eNBs. As shown in FIG. 3, the proximity communication data between UE1 and UE2 is transmitted through eNB1 and eNB2, respectively, without going through the core network. .

具有邻近通信能力的UE需要在一定范围之内才能进行邻近通信。判断两个UE邻近关系的过程称为邻近通信业务(Proximity-based Services，ProSe)发现过程。ProSe发现分为两大类方法：直接发现和基于核心网的发现。A UE with proximity communication capability needs to be within a certain range to perform proximity communication. The process of judging the proximity relationship between two UEs is called a Proximity-based Services (ProSe) discovery process. ProSe discovery is divided into two broad categories of methods: direct discovery and core network based discovery.

直接发现是指ProSe UE直接通过UE之间的信令发现其附近的ProSe UE的过程。Direct discovery refers to a process in which a ProSe UE discovers a ProSe UE in its vicinity directly through signaling between UEs.

基于核心网的发现是指由网络来判断两个ProSe UE是否满足邻近通信条件的过程。一种基于核心网的发现流程如图4所示，包括步骤：Core network based discovery refers to the process by which the network determines whether two ProSe UEs satisfy neighboring communication conditions. A discovery process based on the core network is shown in Figure 4, including the steps:

1a和1b：UE A和UE B分别注册到各自的ProSe功能(Function)实体中，所述ProSe功能实体在图中示为邻近通信功能A或邻近通信功能B。其中，ProSe功能实体是核心网中执行ProSe发现、标识映射等的实体。1a and 1b: UE A and UE B are respectively registered in respective ProSe Function entities, which are shown in the figure as proximity communication function A or proximity communication function B. The ProSe functional entity is an entity that performs ProSe discovery, identity mapping, and the like in the core network.

2.UE A向网络请求与UE B之间的邻近信息，比如，当UE A与UE B之间的距离小于一定值时收到网络通知。2. UE A requests proximity information between the UE and the UE B, for example, when the distance between UE A and UE B is less than one. Receive a network notification when setting.

3a和3b：网络分别对UE A和UE B进行定位。在该过程中，网络可以获知UE当前驻留的小区，以及更细粒度的位置信息。3a and 3b: The network locates UE A and UE B, respectively. In this process, the network can learn the cell where the UE is currently camped, as well as the finer-grained location information.

4.当ProSe功能实体A(图中示为邻近通信功能A)检测到UE A和UE B处于邻近范围内时，ProSe功能实体A向UE A发出通知消息。4. When ProSe functional entity A (shown as proximity communication function A in the figure) detects that UE A and UE B are in the proximity range, ProSe functional entity A issues a notification message to UE A.

但是，现有技术没有给出两个UE经由两个eNB进行直接通信场景下，通信路径如何建立的方案。However, the prior art does not teach how the communication path is established in the case where two UEs perform direct communication via two eNBs.

发明内容Summary of the invention

本发明实施例提供了一种路径建立方法、设备及***，以及一种核心网设备，用以实现两个UE经由两个eNB进行直接通信场景下的通信路径的建立。The embodiment of the present invention provides a path establishment method, device, and system, and a core network device, which is used to implement establishment of a communication path in a direct communication scenario between two UEs via two eNBs.

本发明实施例提供了一种路径建立方法包括：An embodiment of the present invention provides a path establishment method including:

核心网设备确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；The core network device determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link;

核心网设备发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。The core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.

从而实现了核心网发起的两个UE经由两个eNB进行直接通信场景下的通信路径的建立。Thereby, the establishment of the communication path in the direct communication scenario of the two UEs initiated by the core network via the two eNBs is realized.

较佳地，所述核心网设备确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路，包括下列方式之一：Preferably, the core network device determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link, including one of the following manners:

方式一：核心网设备根据预先配置的第一基站和第二基站之间具有直接接口的信息，确定第一基站与第二基站之间可以建立通信链路；Manner 1: The core network device determines, according to the pre-configured information of the direct interface between the first base station and the second base station, that a communication link can be established between the first base station and the second base station;

方式二：核心网设备在建立与第一基站之间的非用户设备UE相关连接时，获取该第一基站上报的与该第一基站有直接接口的第二基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；或者，核心网设备在建立与第二基站之间的非UE相关连接时，获取该第二基站上报的与该第二基站有直接接口的第一基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；Manner 2: The core network device acquires information about the second base station that is directly interfaced with the first base station, and determines the first base station, when establishing a non-user equipment UE-related connection with the first base station. And establishing, by the second base station, a communication link; or, when establishing a non-UE related connection with the second base station, acquiring, by the core network device, the first interface directly reported by the second base station and having the direct interface with the second base station Information of the base station, thereby determining that a communication link can be established between the first base station and the second base station;

方式三：核心网设备通过UE相关信令向第一基站发送该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到第一基站返回的接受消息时，核心网设备确定第一基站与第二基站之间可以建立通信链路；或者，核心网设备通过UE相关信令向第二基站发送该第二基站与第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到第二基站返回的接受消息时，核心网设备确定第二基站与第一基站之间可以建立通信链路。Manner 3: The core network device sends, by using UE-related signaling, the first base station, whether the first base station and the second base station can establish an inquiry message of the communication link, where the second base station identifier is carried, and when the first base station receives the return, Receiving the message, the core network device determines that a communication link can be established between the first base station and the second base station; or, the core network device sends, between the second base station and the first base station, the second base station by using UE related signaling An inquiry message of the communication link may be established, where the first base station identifier is carried, and when receiving the accept message returned by the second base station, the core network device determines that a communication link can be established between the second base station and the first base station.

从而核心网设备可以确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路。Thus, the core network device can determine that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link.

较佳地，核心网设备发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径，包括：Preferably, the core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station, including:

核心网设备在UE的直接通信请求消息触发下，发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。 The core network device initiates establishment of a direct communication path between the first UE and the second UE via the first base station and the second base station, triggered by the direct communication request message of the UE.

从而核心网设备可以在UE的直接通信请求消息触发下，发起建立经由两个基站的直接通信路径。Thus, the core network device can initiate establishment of a direct communication path via the two base stations, triggered by the UE's direct communication request message.

核心网设备获取第一基站用于直接通信的IP地址和隧道端口号；The core network device acquires an IP address and a tunnel port number used by the first base station for direct communication;

核心网设备向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的IP地址和隧道端口号；核心网设备接收第二基站返回的路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；The core network device sends a path setup request message to the second base station, where the IP address and the tunnel port number used by the first base station for direct communication are carried; and the core network device receives the path setup response message returned by the second base station, where the second base station includes IP address and tunnel port number for direct communication;

核心网设备向第一基站发送路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号，核心网设备接收第一基站返回的路径建立响应消息。The core network device sends a path setup request message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are carried, and the core network device receives the path setup response message returned by the first base station.

从而核心网设备基于内部判断，基于核心网发起建立经由两个基站的直接通信路径。Thus, the core network device initiates establishment of a direct communication path via the two base stations based on the core network based on internal judgment.

较佳地，所述核心网设备获取第一基站用于直接通信的IP地址和隧道端口号，包括：Preferably, the core network device acquires an IP address and a tunnel port number used by the first base station for direct communication, including:

核心网设备向第一基站发送直接路径隧道信息请求消息，并接收第一基站返回的第一基站用于直接通信的IP地址和隧道端口号；或者，核心网设备向第一基站发送询问消息，并从第一基站返回的接受消息中获得第一基站用于直接通信的IP地址和隧道端口号。The core network device sends a direct path tunnel information request message to the first base station, and receives an IP address and a tunnel port number used by the first base station for direct communication by the first base station; or the core network device sends an inquiry message to the first base station, And obtaining an IP address and a tunnel port number used by the first base station for direct communication from the accept message returned by the first base station.

核心网设备向第一基站发送路径建立触发命令，其中携带第二基站标识以及用于第二基站确定UE的标识信息；The core network device sends a path establishment trigger command to the first base station, where the second base station identifier is used, and the second base station determines the identity information of the UE.

第一基站收到核心网设备发送的路径建立触发命令后，向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于第二基站确定UE的标识信息；After receiving the path establishment triggering command sent by the core network device, the first base station sends a path establishment request message to the second base station, where the IP address and tunnel port number of the user plane used by the first base station for direct communication are carried, and the first base station controls a face identifier, and the identifier information used by the second base station to determine the UE;

第二基站根据第一基站发送的路径建立请求消息中的UE的标识信息，获知要对第二UE建立直接通信路径，第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path with the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs the RRC reconfiguration process with the second UE to establish the second base station and the second base station. a radio bearer for direct communication between two UEs;

第二基站向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识；The second base station returns a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included;

核心网设备接收第一基站返回的路径建立触发响应消息。The core network device receives a path setup trigger response message returned by the first base station.

从而核心网设备可以基于内部判断，基于基站发起建立经由两个基站的直接通信路径。Thus, the core network device can initiate establishment of a direct communication path via the two base stations based on the base station based on internal judgment.

本发明实施例提供了一种路径建立方法，包括：An embodiment of the present invention provides a path establishment method, including:

第二UE驻留的第二基站接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；The second base station that the second UE camps on receives the path setup request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried;

第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；The second base station performs an RRC reconfiguration process with the second UE, and establishes a radio bearer for direct communication between the second base station and the second UE;

第二基站向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号。The second base station returns a path setup response message to the core network device, where the IP address and tunnel port number used by the second base station for direct communication are included.

第一UE驻留的第一基站接收核心网设备发送的路径建立请求消息，其中携带第二UE 驻留的第二基站用于直接通信的IP地址和隧道端口号；The first base station that the first UE camps on receives the path setup request message sent by the core network device, where the second UE is carried The IP address and tunnel port number of the second base station that is camped on for direct communication;

第一基站与第一UE进行RRC重配过程，建立第一基站与第一UE之间用于直接通信的无线承载；The first base station performs an RRC reconfiguration process with the first UE, and establishes a radio bearer for direct communication between the first base station and the first UE;

第一基站向核心网设备返回路径建立响应消息。The first base station returns a path setup response message to the core network device.

从而在基站侧，实现了核心网设备基于核心网发起建立经由两个基站的直接通信路径。Therefore, on the base station side, the core network device initiates establishment of a direct communication path via two base stations based on the core network.

较佳地，该方法还包括：Preferably, the method further comprises:

第一基站和/或第二基站在建立与核心网设备之间的非UE相关连接时，向核心网设备上报与自身有直接接口的基站的信息。When the first base station and/or the second base station establishes a non-UE related connection with the core network device, the information of the base station having a direct interface with itself is reported to the core network device.

从而使核心网可以确定通信双方UE各自所在的基站可以建立通信链路。Therefore, the core network can determine that the base station where the communication UEs are located can establish a communication link.

较佳地，该方法还包括：Preferably, the method further comprises:

第一基站接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the first base station, an inquiry message of whether a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

第一基站当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。优选地，第一基站还可以在接受消息中携带第一基站用于直接通信的IP地址和隧道端口号。When determining, by the second base station identifier, the first base station can establish a communication link between the first base station and the second base station, the first base station returns an accept message to the core network device. Preferably, the first base station may further carry an IP address and a tunnel port number used by the first base station for direct communication in the accept message.

第一UE驻留的第一基站接收核心网设备发送的路径建立触发命令，其中携带第二基站标识，以及用于第二基站确定UE的标识信息；The first base station that the first UE camps on receives the path establishment trigger command sent by the core network device, where the second base station identifier is carried, and the second base station determines the identifier information of the UE.

第一基站向第二UE驻留的第二基站发送路径建立请求消息，其中携带第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息；The first base station sends a path setup request message to the second base station where the second UE resides, where the first base station carries the IP address and tunnel port number of the direct communication user plane, the first base station control plane identifier, and the second base station Determining, by the base station, identification information of the UE;

第一基站与第一UE进行RRC重配，并且第一基站向核心网设备返回路径建立触发响应消息。The first base station performs RRC reconfiguration with the first UE, and the first base station returns a path establishment trigger response message to the core network device.

第二UE驻留的第二基站根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；The second base station that the second UE camps on, according to the path setup request message sent by the first base station where the first UE is camped, learns that a direct communication path is to be established for the second UE, and the second base station performs an RRC reconfiguration process with the second UE. Establishing a radio bearer for direct communication between the second base station and the second UE;

第二基站向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The second base station returns a path setup response message to the first base station, where the IP address and tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

从而在基站侧，实现了核心网设备基于基站发起建立经由两个基站的直接通信路径。Thus, on the base station side, the core network device is enabled to establish a direct communication path via the two base stations based on the base station.

较佳地，该方法还包括：Preferably, the method further comprises:

第一基站接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识； Receiving, by the first base station, an inquiry message of whether a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

第一基站当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。When determining, by the second base station identifier, the first base station can establish a communication link between the first base station and the second base station, the first base station returns an accept message to the core network device.

本发明实施例提供了一种核心网设备，包括：The embodiment of the invention provides a core network device, including:

确定单元，用于确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；a determining unit, configured to determine that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link;

发起单元，用于发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。And an initiating unit, configured to initiate establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.

较佳地，所述确定单元采用下列方式之一确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路：Preferably, the determining unit determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link in one of the following manners:

方式一：根据预先配置的第一基站和第二基站之间具有直接接口的信息，确定第一基站与第二基站之间可以建立通信链路；Manner 1: determining, according to the pre-configured information of the direct interface between the first base station and the second base station, that a communication link can be established between the first base station and the second base station;

方式二：在建立与第一基站之间的非用户设备UE相关连接时，获取该第一基站上报的与该第一基站有直接接口的第二基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；或者，在建立与第二基站之间的非UE相关连接时，获取该第二基站上报的与该第二基站有直接接口的第一基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；Manner 2: When establishing a non-user equipment UE-related connection with the first base station, acquiring information about the second base station that is directly interfaced with the first base station, and determining the first base station and the second The communication link may be established between the base stations; or, when the non-UE related connection with the second base station is established, the information of the first base station that is directly interfaced with the second base station reported by the second base station is obtained, thereby determining A communication link can be established between the first base station and the second base station;

方式三：通过UE相关信令向第一基站发送该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到第一基站返回的接受消息时，确定第一基站与第二基站之间可以建立通信链路；或者，通过UE相关信令向第二基站发送该第二基站与第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到第二基站返回的接受消息时，确定第二基站与第一基站之间可以建立通信链路。Manner 3: The UE sends an inquiry message about whether a communication link can be established between the first base station and the second base station by using the UE-related signaling, where the second base station identifier is carried, and the receiving message returned by the first base station is received. Determining that a communication link can be established between the first base station and the second base station; or sending, by using UE-related signaling, an inquiry message of whether a communication link can be established between the second base station and the first base station to the second base station, The first base station identifier is carried, and when the accept message returned by the second base station is received, it is determined that a communication link can be established between the second base station and the first base station.

较佳地，所述发起单元，具体用于：Preferably, the initiating unit is specifically configured to:

在UE的直接通信请求消息触发下，发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。Triggering to establish a direct communication path between the first UE and the second UE via the first base station and the second base station, triggered by the UE's direct communication request message.

获取第一基站用于直接通信的IP地址和隧道端口号；Obtaining an IP address and a tunnel port number used by the first base station for direct communication;

向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的IP地址和隧道端口号；接收第二基站返回的路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；Sending a path establishment request message to the second base station, where the IP address and the tunnel port number used by the first base station for direct communication are carried; and the path establishment response message returned by the second base station is received, where the IP address used by the second base station for direct communication is included And tunnel port number;

向第一基站发送路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号；接收第一基站返回的路径建立响应消息。And sending a path setup request message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are carried; and the path setup response message returned by the first base station is received.

从而核心网设备基于内部判断，基于核心网发起建立经由两个基站的直接通信路径。 Thus, the core network device initiates establishment of a direct communication path via the two base stations based on the core network based on internal judgment.

向第一基站发送路径建立触发命令，其中携带第二基站标识以及用于第二基站确定UE的标识信息；Sending a path establishment trigger command to the first base station, where the second base station identifier is used, and the identifier information used by the second base station to determine the UE is used;

所述第一基站收到所述路径建立触发命令后，向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于所述第二基站确定UE的标识信息；After receiving the path establishment triggering command, the first base station sends a path establishment request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication are carried. a base station control plane identifier, and the identifier information used by the second base station to determine the UE;

所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs wireless with the second UE. a resource control RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE;

接收第一基站返回的路径建立触发响应消息。Receiving a path setup trigger response message returned by the first base station.

本发明实施例提供了一种路径建立设备，包括：The embodiment of the invention provides a path establishing device, including:

第一单元，用于接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；a first unit, configured to receive a path setup request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried;

第二单元，用于与第二UE进行RRC重配过程，建立在所述设备与第二UE之间用于直接通信的无线承载；a second unit, configured to perform an RRC reconfiguration process with the second UE, and establish a radio bearer for direct communication between the device and the second UE;

第三单元，用于向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号a third unit, configured to return a path establishment response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included

较佳地，所述第三单元还用于：Preferably, the third unit is further configured to:

在建立与核心网设备之间的非UE相关连接时，向核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the information of the base station having a direct interface with itself is reported to the core network device.

较佳地，所述第一单元还用于：接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Preferably, the first unit is further configured to: receive, by the core network device, an inquiry message that the communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

所述第三单元还用于：当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。The third unit is further configured to: when determining, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.

第一单元，用于接收核心网设备发送的路径建立触发命令，其中携带第二UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；a first unit, configured to receive a path setup trigger command sent by the core network device, where the second base station identifier that the second UE camps on, and the identifier information used by the second base station to determine the UE;

第三单元，用于向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息；a third unit, configured to send a path setup request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the second base station determining Identification information of the UE;

第二单元，用于与第一UE进行RRC重配，并且向核心网设备返回路径建立触发响应消息。And a second unit, configured to perform RRC reconfiguration with the first UE, and return a path establishment trigger response message to the core network device.

较佳地，所述第一单元还用于：接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识； Preferably, the first unit is further configured to: receive, by the core network device, an inquiry message that the communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

较佳地，第二单元还用于：根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；Preferably, the second unit is further configured to: according to the path establishment request message sent by the first base station where the first UE resides, learn to establish a direct communication path to the second UE, perform an RRC reconfiguration process with the second UE, and establish a radio bearer for direct communication between the second base station and the second UE;

第三单元还用于：向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The third unit is further configured to: return a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

第二单元，用于根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；a second unit, configured to establish a direct communication path with the second UE according to the path establishment request message sent by the first base station where the first UE is camped, perform an RRC reconfiguration process with the second UE, and establish a second base station and the second a radio bearer for direct communication between two UEs;

第三单元，用于向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。And a third unit, configured to return a path setup response message to the first base station, where the IP address and tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

本发明实施例提供了一种路径建立***，包括：第一UE驻留的第一基站和第二UE驻留的第二基站，其中，An embodiment of the present invention provides a path establishment system, including: a first base station where a first UE resides and a second base station where a second UE resides, where

第二基站用于：The second base station is used to:

接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；Receiving a path establishment request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried;

与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；Performing an RRC reconfiguration process with the second UE to establish a radio bearer for direct communication between the second base station and the second UE;

向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；Returning a path setup response message to the core network device, where the IP address and tunnel port number used by the second base station for direct communication are included;

第一基站用于：The first base station is used to:

接收核心网设备发送的路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号；Receiving a path establishment request message sent by the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are carried;

与第一UE进行RRC重配过程，建立第一基站与第一UE之间用于直接通信的无线承载；Performing an RRC reconfiguration process with the first UE to establish a radio bearer for direct communication between the first base station and the first UE;

向核心网设备返回路径建立响应消息。A path setup response message is returned to the core network device.

较佳地，所述第一基站还用于：Preferably, the first base station is further configured to:

接收核心网设备发送的直接路径隧道信息请求消息，并返回第一基站用于直接通信的IP地址和隧道端口号给核心网设备；或者，接收核心网设备发送的询问消息，并返回接受消息，其中携带第一基站用于直接通信的IP地址和隧道端口号。Receiving a direct path tunnel information request message sent by the core network device, and returning an IP address and a tunnel port number used by the first base station for direct communication to the core network device; or receiving an inquiry message sent by the core network device, and returning an accept message, The IP address and the tunnel port number used by the first base station for direct communication are carried.

较佳地，第一基站和/或第二基站还用于：在建立与核心网设备之间的非UE相关连接时，向核心网设备上报与自身有直接接口的基站的信息。Preferably, the first base station and/or the second base station are further configured to: when establishing a non-UE related connection with the core network device, report information of the base station that has a direct interface with itself to the core network device.

较佳地，第一基站还用于： Preferably, the first base station is further configured to:

接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving an inquiry message of the communication link between the first base station and the second base station that is sent by the core network device, where the second base station identifier is carried;

当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。优选地，在接受消息中携带第一基站用于直接通信的IP地址和端口号。When it is determined according to the second base station identifier that a communication link can be established between the first base station and the second base station, an accept message is returned to the core network device. Preferably, the accepting message carries the IP address and port number used by the first base station for direct communication.

第一基站用于：The first base station is used to:

接收核心网设备发送的路径建立触发命令，其中携带第二基站标识，以及用于第二基站确定UE的标识信息；Receiving a path establishment trigger command sent by the core network device, where the second base station identifier is carried, and the second base station determines the identifier information of the UE;

向第二UE驻留的第二基站发送路径建立请求消息，其中携带第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息；Sending a path setup request message to the second base station where the second UE camps, where the first base station carries the IP address and tunnel port number of the direct communication user plane, the first base station control plane identifier, and the second base station determines the UE Identification information;

第二基站用于：The second base station is used to:

根据第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径；与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；Obtaining, according to the path establishment request message sent by the first base station, establishing a direct communication path to the second UE; performing an RRC reconfiguration process with the second UE, establishing a radio bearer for direct communication between the second base station and the second UE;

向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识；Returning, to the first base station, a path setup response message, where the IP address and the tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included;

第一基站还用于：与第一UE进行RRC重配，并且向核心网设备返回路径建立触发响应消息。The first base station is further configured to: perform RRC reconfiguration with the first UE, and return a path establishment trigger response message to the core network device.

较佳地，第一基站还用于：Preferably, the first base station is further configured to:

当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。When it is determined according to the second base station identifier that a communication link can be established between the first base station and the second base station, an accept message is returned to the core network device.

本发明实施例提供了一种核心网设备，该设备包括：处理器、存储器；An embodiment of the present invention provides a core network device, where the device includes: a processor and a memory;

所述存储器，用于存储一个或多个可执行程序，被用于配置所述处理器；The memory is configured to store one or more executable programs, which are used to configure the processor;

所述处理器，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。The processor is configured with one or more executable programs, and the one or more executable programs are configured to perform a method for determining a first base station and a second UE station where the first user equipment UE camps The remaining second base station may establish a communication link; and be used to initiate establishment of a direct communication path between the first UE and the second UE via the first base station and the second base station.

本发明实施例提供了一种基站，包括：处理器、存储器、收发机；An embodiment of the present invention provides a base station, including: a processor, a memory, and a transceiver;

所述收发机，用于在所述处理器的控制下接收和发送数据； The transceiver is configured to receive and send data under the control of the processor;

所述处理器，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息；The processor is configured with one or more executable programs, and the one or more executable programs are configured to: receive a path establishment trigger command sent by a core network device, where the second user equipment is carried a second base station identifier that is reserved by the UE, and identifier information for determining, by the second base station, a path setup request message for carrying the IP address of the user plane used by the first base station for direct communication And a tunnel port number, a first base station control plane identifier, and identifier information used by the second base station to determine the UE; configured to perform radio resource control RRC reconfiguration with the first UE, and return to the core network device Path establishment trigger response message;

用于根据第一用户设备UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与所述第二UE进行无线资源控制RRC重配过程，建立第二基站与所述第二UE之间用于直接通信的无线承载；用于向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。And determining, according to the path setup request message sent by the first base station where the first user equipment UE is camped, to establish a direct communication path for the second UE, and performing a radio resource control RRC reconfiguration process with the second UE to establish a second a radio bearer for direct communication between the base station and the second UE, configured to return a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are included, And a second base station control plane identifier.

本发明实施例提供了一种路径建立***，包括：核心网设备和基站，其中，An embodiment of the present invention provides a path establishment system, including: a core network device and a base station, where

所述核心网设备用于：The core network device is used to:

确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径；Determining that the first base station where the first user equipment UE camps and the second base station where the second UE camps may establish a communication link; and initiating establishing between the first UE and the second UE via the a direct communication path between a base station and the second base station;

所述基站用于：The base station is used to:

接收核心网设备发送的路径建立请求消息，其中携带第一用户设备UE驻留的第一基站用于直接通信的IP地址和隧道端口号；或者，携带第二UE驻留的第二基站用于直接通信的IP地址和隧道端口号；Receiving a path setup request message sent by the core network device, where the first base station that the first user equipment UE camps on carries the IP address and the tunnel port number for direct communication; or the second base station that carries the second UE camps for Direct communication IP address and tunnel port number;

用于与第二UE进行无线资源控制RRC重配过程，建立在所述设备与所述第二UE之间用于直接通信的无线承载；或者，与所述第一UE进行无线资源控制RRC重配过程，建立所述第一基站与所述第一UE之间用于直接通信的无线承载；And performing a radio resource control RRC reconfiguration procedure with the second UE, establishing a radio bearer for direct communication between the device and the second UE; or performing radio resource control RRC with the first UE a matching procedure, establishing a radio bearer for direct communication between the first base station and the first UE;

用于向所述核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；或者，包含第一基站用于直接通信的IP地址和端口号。And a method for returning a path establishment response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included; or, the IP address and port number used by the first base station for direct communication are included.

本发明实施例提供了一种路径建立***，该***包括：核心网设备和基站，其中，An embodiment of the present invention provides a path establishment system, where the system includes: a core network device and a base station, where

所述核心网设备用于：The core network device is used to:

所述基站用于：The base station is used to:

接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息；Receiving a path establishment triggering command sent by the core network device, where the second base station identifier that the second user equipment UE camps on, and the identifier information used by the second base station to determine the UE, is used to send a path establishment request to the second base station. a message, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the identifier information used by the second base station to determine the UE are used; The UE performs radio resource control RRC reconfiguration, and returns a path establishment trigger response message to the core network device;

用于根据第一用户设备UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与所述第二UE进行无线资源控制RRC重配过程，建立第二基站与所述第二UE之间用于直接通信的无线承载；用于向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。And determining, according to the path setup request message sent by the first base station where the first user equipment UE is camped, to establish a direct communication path for the second UE, and performing a radio resource control RRC reconfiguration process with the second UE to establish a second a radio bearer for direct communication between the base station and the second UE, configured to return a path setup response message to the first base station, where And including an IP address and a tunnel port number used by the second base station for direct communication, and a second base station control plane identifier.

附图说明DRAWINGS

图1现有技术中设备间通信的数据通道示意图；1 is a schematic diagram of a data channel of communication between devices in the prior art;

图2a和图2b为现有技术中邻近通信路径示意图；2a and 2b are schematic diagrams of a proximity communication path in the prior art;

图3为现有技术中经由两个eNB的直接通信示意图；3 is a schematic diagram of direct communication via two eNBs in the prior art;

图4为现有技术中一种基于核心网的发现流程示意图；4 is a schematic diagram of a discovery process based on a core network in the prior art;

图5为本发明实施例一提供的一种路径建立方法的流程示意图；FIG. 5 is a schematic flowchart diagram of a path establishment method according to Embodiment 1 of the present invention;

图6为本发明实施例二提供的一种路径建立方法的流程示意图；FIG. 6 is a schematic flowchart diagram of a path establishment method according to Embodiment 2 of the present invention;

图7为本发明实施例三提供的一种路径建立方法的流程示意图；FIG. 7 is a schematic flowchart diagram of a path establishment method according to Embodiment 3 of the present invention;

图8为本发明实施例四提供的一种路径建立方法的流程示意图；FIG. 8 is a schematic flowchart diagram of a path establishment method according to Embodiment 4 of the present invention;

图9为本发明实施例五提供的一种路径建立方法的流程示意图；FIG. 9 is a schematic flowchart diagram of a path establishment method according to Embodiment 5 of the present invention;

图10为本发明实施例六提供的当UE1和UE2所属的核心网设备不同时，UE1的核心网设备获知UE2所属的核心网设备的方法流程示意图；10 is a schematic flowchart of a method for a core network device of UE1 to learn a core network device to which UE2 belongs when UE1 and UE2 belong to a core network device according to Embodiment 6 of the present invention;

图11为本发明实施例提供的核心网侧的一种路径建立方法的流程示意图；FIG. 11 is a schematic flowchart diagram of a path establishing method on a core network side according to an embodiment of the present invention;

图12为本发明实施例提供的接入网侧的一种路径建立方法的流程示意图；FIG. 12 is a schematic flowchart of a method for establishing a path on an access network side according to an embodiment of the present disclosure;

图13为本发明实施例提供的接入网侧的另一种路径建立方法的流程示意图；FIG. 13 is a schematic flowchart of another path establishment method on the access network side according to an embodiment of the present disclosure;

图14为本发明实施例提供的一种核心网设备的结构示意图；FIG. 14 is a schematic structural diagram of a core network device according to an embodiment of the present disclosure;

图15为本发明实施例提供的另一种核心网设备的结构示意图；FIG. 15 is a schematic structural diagram of another core network device according to an embodiment of the present disclosure;

图16为本发明实施例提供的一种路径建立设备的结构示意图；FIG. 16 is a schematic structural diagram of a path establishing device according to an embodiment of the present disclosure;

图17为本发明实施例提供的一种核心网设备的结构示意图；FIG. 17 is a schematic structural diagram of a core network device according to an embodiment of the present disclosure;

图18为本发明实施例提供的一种基站的结构示意图；FIG. 18 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

图19为本发明实施例提供的一种基站的结构示意图；FIG. 19 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

图20为本发明实施例提供了一种路径建立***的结构示意图；FIG. 20 is a schematic structural diagram of a path establishment system according to an embodiment of the present invention;

图21为本发明实施例提供了一种路径建立***的结构示意图。FIG. 21 is a schematic structural diagram of a path establishment system according to an embodiment of the present invention.

具体实施方式detailed description

本发明实施例提出一种建立经由两个eNB的邻近通信业务直接通信路径的方案。本发明实施例中，进行邻近通信的UE包括通信发起方UE和通信终止方UE，下文分别简称为第一UE和第二UE。若无特殊指示，“UE”均表示第一UE。第一UE和第二UE各自驻留的基站分别称为第一基站和第二基站，本发明实施例中仅关注第一基站和第二基站不同的场景。Embodiments of the present invention provide a solution for establishing a direct communication path of a neighboring communication service via two eNBs. In the embodiment of the present invention, the UE performing the proximity communication includes a communication initiator UE and a communication terminator UE, which are hereinafter referred to as a first UE and a second UE, respectively. If there is no special indication, "UE" indicates the first UE. The base stations in which the first UE and the second UE respectively reside are referred to as the first base station and the second base station, respectively. In the embodiment of the present invention, only the scenarios in which the first base station and the second base station are different are focused.

本发明实施例提供的一种由网络发起的经由两个eNB的直接路径建立方法，包括两个大的步骤：A network-initiated direct path establishment method via two eNBs provided by the embodiment of the present invention includes two major steps:

第一步骤：核心网设备确定通信双方UE各自所在的基站可以建立通信链路。The first step: the core network device determines that the base station where the communication UEs are located can establish a communication link.

第二步骤：核心网设备发起建立经由两个基站的直接通信路径。Second step: The core network device initiates establishing a direct communication path via the two base stations.

所述第一步骤具体有三种实现方式： The first step specifically has three implementation manners:

方式一：核心网设备中配置有下属基站两两之间是否有直接接口的信息。该配置由运营商基于网络拓扑完成。Manner 1: The core network device is configured with information about whether there is a direct interface between the two subordinate base stations. This configuration is done by the operator based on the network topology.

方式二：基站在建立与核心网设备之间的非UE相关连接时，向核心网设备上报与自身有直接接口的其它基站的信息。根据该信息，核心网设备维护基站之间直接接口的数据库。此处，所述核心网设备可以是移动性管理实体。Manner 2: When the base station establishes a non-UE related connection with the core network device, the base station reports information of other base stations that have direct interfaces with itself to the core network device. Based on this information, the core network device maintains a database of direct interfaces between the base stations. Here, the core network device may be a mobility management entity.

方式三：核心网设备通过UE相关信令向第一基站直接发送询问消息，其中携带第二基站标识。其中，第二基站标识可以由核心网在邻近通信发现过程中获得，具体方法不在本发明范围之内。该方式三包括两个步骤：Manner 3: The core network device directly sends an inquiry message to the first base station by using UE-related signaling, where the second base station identifier is carried. The second base station identifier may be obtained by the core network in the proximity communication discovery process, and the specific method is not within the scope of the present invention. This method three includes two steps:

步骤一：核心网设备向第一基站直接发送询问消息，其中携带第二基站标识。其中，第二基站的标识可以是eNB ID或演进的通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)小区全球标识(E-UTRAN Cell Global Identity，ECGI)。Step 1: The core network device directly sends an inquiry message to the first base station, where the second base station identifier is carried. The identifier of the second base station may be an eNB ID or an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) E-UTRAN Cell Global Identity (ECGI).

步骤二：第一基站根据第二基站标识判断自身与该第二基站之间是否可以建立通信链路，如果可以则向核心网返回接受消息，否则返回拒绝消息。Step 2: The first base station determines, according to the second base station identifier, whether a communication link can be established between itself and the second base station, and if yes, returns an accept message to the core network, otherwise returns a reject message.

所述第二步骤中，核心网设备发起建立经由两个基站的直接通信路径的过程中，核心网设备可以在UE的直接通信请求消息触发下，发起建立经由两个基站的直接通信路径；或者，核心网设备也可以基于内部判断发起建立经由两个基站的直接通信路径，例如通过邻近发现结果显示第一UE和第二UE满足邻近通信条件，发起建立经由两个基站的直接通信路径。In the second step, in a process in which the core network device initiates establishing a direct communication path through two base stations, the core network device may initiate establishment of a direct communication path via two base stations, triggered by a direct communication request message of the UE; or The core network device may also initiate establishment of a direct communication path via two base stations based on internal judgments, for example, by indicating that the first UE and the second UE satisfy the proximity communication condition by the proximity discovery result, and initiate establishment of a direct communication path via the two base stations.

具体地，核心网设备在UE的直接通信请求消息触发下，发起建立经由两个基站的直接通信路径时，UE向核心网设备发送的直接通信请求消息中包含第一UE标识和第二UE标识。其中，第一UE标识可以是全球移动用户标识(International Mobile Subscriber Identity，IMSI)或其邻近通信标识，如ProSe UE ID或ProSe应用(Application)ID。第二UE标识可以是邻近通信标识，如ProSe UE ID或ProSe Application ID。Specifically, the core network device, when triggered by the direct communication request message of the UE, initiates the establishment of the direct communication path via the two base stations, and the direct communication request message sent by the UE to the core network device includes the first UE identifier and the second UE identifier. . The first UE identifier may be an International Mobile Subscriber Identity (IMSI) or a neighboring communication identifier, such as a ProSe UE ID or a ProSe Application ID. The second UE identity may be a proximity communication identity, such as a ProSe UE ID or a ProSe Application ID.

核心网设备基于内部判断发起建立经由两个基站的直接通信路径时，具体包括两种方式：When the core network device initiates the establishment of a direct communication path via two base stations based on internal judgment, the two methods are specifically included:

方式一：基于核心网设备，具体包括步骤：Method 1: Based on the core network device, specifically including the steps:

一、核心网设备获取第一基站用于直接通信的IP地址和隧道端口号。其中，核心网设备可以向第一基站发送直接路径隧道信息请求消息，第一基站收到后返回自身用于直接通信的IP地址和隧道端口号；或者，核心网可以通过询问消息获得第一基站用于直接通信的IP地址和隧道端口号。当第一基站收到询问消息后，如果第一基站与第二基站之间可以建立通信链路，则在接受消息中携带用于直接通信的IP地址和隧道端口号。1. The core network device acquires an IP address and a tunnel port number used by the first base station for direct communication. The core network device may send a direct path tunnel information request message to the first base station, and the first base station returns an IP address and a tunnel port number for direct communication after receiving the first base station; or the core network may obtain the first base station by using an inquiry message. IP address and tunnel port number for direct communication. After the first base station receives the inquiry message, if the communication link can be established between the first base station and the second base station, the IP address and the tunnel port number for direct communication are carried in the accept message.

二、核心网设备向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的IP地址和隧道端口号。第二基站与第二UE进行RRC(Radio Resource Control，无线资源控制)重配过程，建立第二基站与第二UE之间用于直接通信的无线承载。第二基站向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号。2. The core network device sends a path establishment request message to the second base station, where the IP address and the tunnel port number used by the first base station for direct communication are carried. The second base station performs an RRC (Radio Resource Control) reconfiguration process with the second UE, and establishes a radio bearer for direct communication between the second base station and the second UE. The second base station returns a path setup response message to the core network device, where the IP address and tunnel port number used by the second base station for direct communication are included.

其中，关于核心网设备如何获知第二UE驻留的第二基站，包括：The second base station, where the core network device learns that the second UE camps, includes:

核心网设备从第一UE的请求消息中获得第二UE的标识信息，并根据该标识信息获取到第二UE的永久标识，例如国际移动用户标识(International Mobile Subscriber Identifier，IMSI)，其中，第二UE的标识信息和第二UE的永久标识如何映射，以及核心网设备如何获取到第二UE的永久标识，可以采用现有技术。 The core network device obtains the identifier information of the second UE from the request message of the first UE, and obtains the permanent identifier of the second UE according to the identifier information, for example, an International Mobile Subscriber Identifier (IMSI), where The prior art can be used to map how the identity information of the second UE and the permanent identity of the second UE are mapped, and how the core network device obtains the permanent identity of the second UE.

核心网设备根据第二UE的永久标识找到该UE的上下文信息，并根据UE的上下文信息可以确定UE的状态。The core network device finds the context information of the UE according to the permanent identifier of the second UE, and can determine the state of the UE according to the context information of the UE.

如果第二UE是空闲态，则核心网设备发起寻呼，从而可获得第二UE当前驻留的基站(也即第二基站)的标识；If the second UE is in an idle state, the core network device initiates paging, so that an identifier of the base station (ie, the second base station) currently camped by the second UE can be obtained;

如果第二UE是连接态，则核心网设备存储的第二UE的上下文信息中就包含第二基站的标识。If the second UE is in the connected state, the identifier of the second UE is included in the context information of the second UE stored by the core network device.

三、核心网设备向第一基站发送路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号。第一基站与第一UE进行RRC重配过程，建立第一基站与第一UE之间用于直接通信的无线承载。第一基站向核心网设备返回路径建立响应消息，其中包含第一基站用于直接通信的IP地址和端口号。The core network device sends a path establishment request message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are carried. The first base station performs an RRC reconfiguration process with the first UE, and establishes a radio bearer for direct communication between the first base station and the first UE. The first base station returns a path setup response message to the core network device, including the IP address and port number used by the first base station for direct communication.

根据上述三个步骤，第一基站与第二基站通过核心网设备交互了建立直接通信路径所需参数，并分别建立了第一UE和第二UE与基站之间用于直接通信的无线承载，直接通信路径建立完毕。According to the foregoing three steps, the first base station and the second base station interact with the core network device to establish parameters required for establishing a direct communication path, and respectively establish a radio bearer for direct communication between the first UE and the second UE and the base station, The direct communication path is established.

另外，若第一UE和第二UE所属的核心网设备不同，则基于核心网设备发起建立经由两个基站的直接通信路径时：In addition, if the core network device to which the first UE and the second UE belong are different, when the direct communication path via the two base stations is initiated based on the core network device:

核心网设备收到第一UE的请求消息时，根据其中包含的第二UE的标识，可以获知第二UE所属的核心网设备。When receiving the request message of the first UE, the core network device can learn the core network device to which the second UE belongs according to the identifier of the second UE included in the core network device.

当采用核心网设备发起直接通信路径建立时，第一基站和第二基站之间的路径建立相关消息需要通过第一UE和第二UE各自所属的核心网设备进行中转。When the core network device initiates the establishment of the direct communication path, the path establishment related message between the first base station and the second base station needs to be transited by the core network device to which the first UE and the second UE belong.

方式二：基于基站，具体包括步骤：Method 2: Based on the base station, specifically including the steps:

一、核心网设备确定第一基站可以与第二基站建立通信链路后，向第一基站发送路径建立触发命令，其中携带第二基站标识，以及用于第二基站确定第二UE的标识信息。The core network device determines that the first base station can establish a communication link with the second base station, and sends a path establishment trigger command to the first base station, where the second base station identifier is carried, and the second base station determines the identifier information of the second UE. .

二、第一基站收到路径建立触发命令后，向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及第一步中收到的用于第二基站确定UE的标识信息。After receiving the path establishment triggering command, the first base station sends a path establishment request message to the second base station, where the first base station carries the IP address and tunnel port number of the direct communication user plane, the control identifier of the first base station, and The identification information received by the first base station for determining the UE in the first step.

三、第二基站根据第一基站发送的路径建立请求消息中的标识信息，获知要对第二UE建立直接通信路径。第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载。The second base station learns to establish a direct communication path to the second UE according to the identifier information in the path establishment request message sent by the first base station. The second base station performs an RRC reconfiguration process with the second UE, and establishes a radio bearer for direct communication between the second base station and the second UE.

四、第二基站向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。4. The second base station returns a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.

五、第一基站与第一UE进行RRC重配。第一基站向核心网设备返回路径建立触发响应消息。5. The first base station performs RRC reconfiguration with the first UE. The first base station returns a path establishment trigger response message to the core network device.

根据上述五个步骤，在核心网设备触发下，第一基站与第二基站直接交互建立直接通信路径所需参数，并分别建立了与第一UE和第二UE与基站之间用于直接通信的无线承载，直接通信路径建立完毕。According to the above five steps, the first base station and the second base station directly interact with each other to establish parameters required for the direct communication path, and establish direct communication with the first UE and the second UE and the base station respectively. The wireless bearer is established and the direct communication path is established.

本发明实施例中所述的核心网设备，包括MME(Mobility Management Entity，移动性管理实体)和/或ProSe功能实体。The core network device in the embodiment of the present invention includes an MME (Mobility Management Entity) and/or a ProSe functional entity.

下面给出几个具体实施例的说明。 A description of several specific embodiments is given below.

实施例一：Embodiment 1:

参见图5，路径建立过程包括步骤：Referring to Figure 5, the path establishment process includes the steps:

501.MME预先通过配置保存下属基站两两之间是否有直接接口的信息，MME无需与eNB交互。501. The MME pre-configures whether there is direct interface information between the two subordinate base stations, and the MME does not need to interact with the eNB.

502.eNB1向MME发起S1建立，在S1建立请求消息中携带与其有X2接口的一个或多个eNB的标识。502. eNB1 initiates an S1 establishment to the MME, and carries an identifier of one or more eNBs having an X2 interface in the S1 setup request message.

503.MME返回S1建立响应给eNB1。503. The MME returns an S1 setup response to the eNB1.

504-505、eNB2采用相同的过程与MME建立S1连接。504-505, eNB2 uses the same process to establish an S1 connection with the MME.

通过上述过程，MME可以知道与下属任一eNB有直接接口的eNB标识。需要说明的是，步骤502、503与步骤504、505之间没有先后顺序。并且，步骤501和502+503/504+505是任选其一的。Through the above process, the MME can know the eNB identity that has a direct interface with any of the subordinate eNBs. It should be noted that there is no order between steps 502, 503 and steps 504, 505. And, steps 501 and 502+503/504+505 are optional.

实施例二：Embodiment 2:

UE1和UE2采用基于网络的邻近发现机制，UE1和UE2分别驻留于eNB1和eNB2，eNB1和eNB2连接到同一个MME。UE1 and UE2 adopt a network-based proximity discovery mechanism, UE1 and UE2 respectively camp on eNB1 and eNB2, and eNB1 and eNB2 are connected to the same MME.

参见图6，具体的路径建立过程包括步骤：Referring to Figure 6, the specific path establishment process includes the steps:

601.UE和网络执行基于网络的邻近发现过程，MME在该过程中获得UE1和UE2当前驻留基站的标识eNB1和eNB2。601. The UE and the network perform a network-based proximity discovery process, in which the MME obtains the identifiers eNB1 and eNB2 of the UE1 and UE2 currently camping on the base station.

602.UE1向MME发送邻近通信建立请求，其中携带UE1和UE2标识。602. UE1 sends a proximity communication setup request to the MME, where the UE1 and UE2 identifiers are carried.

603.MME根据601步中获得的信息，可以知道UE2当前驻留基站对应的基站标识。MME向eNB1发送询问消息，其中携带eNB2标识。603. According to the information obtained in step 601, the MME can know the base station identifier corresponding to the base station currently camped by the UE2. The MME sends an inquiry message to eNB1 carrying the eNB2 identity.

604.eNB1根据配置信息可知eNB2与自身有X2接口，向MME返回响应消息，其中携带eNB1为直接路径分配的GPRS隧道协议(GPRS Tunneling Protocol，GTP)隧道端口号，即图6中的隧道端点标识(Tunneling Endpoint ID，TEID)，以及eNB1用于直接通信的IP地址。604. According to the configuration information, the eNB2 has an X2 interface with itself, and returns a response message to the MME, where the GPRS Tunneling Protocol (GTP) tunnel port number, that is, the tunnel end identifier in FIG. (Tunneling Endpoint ID, TEID), and the IP address that eNB1 uses for direct communication.

605.MME向eNB2发送E-UTRAN无线接入承载(E-UTRAN Radio Access Bearer，E-RAB)建立请求消息，其中携带604步中收到的eNB1IP地址和TEID。605. The MME sends an E-UTRAN Radio Access Bearer (E-RAB) setup request message to the eNB2, where the eNB1 IP address and TEID received in step 604 are carried.

606.eNB2发起RRC重配过程，建立与UE2之间用于邻近通信的无线承载。606. eNB2 initiates an RRC reconfiguration procedure to establish a radio bearer for proximity communication with UE2.

607.eNB2向MME返回E-RAB建立响应，其中携带eNB2为直接路径分配的TEID，以及eNB2用于直接通信的IP地址。607. eNB2 returns an E-RAB setup response to the MME, where the eNB2 carries the TEID assigned to the direct path and the IP address that eNB2 uses for direct communication.

608.MME向eNB1发送E-RAB建立请求消息，其中携带607步收到的eNB2IP地址和TEID，以及一个非接入层(Non Access Stratum，NAS)分组数据单元(Packet Data Unit，PDU)，该PDU为MME发送给UE的邻近通信建立响应消息。608. The MME sends an E-RAB setup request message to the eNB1, where the eNB2 IP address and the TEID received in step 607, and a Non-Access Stratum (NAS) Packet Data Unit (PDU) are used. The PDU is a proximity communication setup response message sent by the MME to the UE.

609.eNB1发起RRC重配过程，建立与UE1之间用于邻近通信的无线承载。eNB1在RRC重配过程中将NAS PDU发给UE1.609. eNB1 initiates an RRC reconfiguration procedure to establish a radio bearer for communication with UE1 for proximity communication. eNB1 sends the NAS PDU to UE1 during the RRC reconfiguration process.

610.eNB1向MME返回E-RAB建立响应，其中携带eNB1的IP地址和TEID。至此，UE1、eNB1、eNB2、UE2之间的直接通信路径建立完成。610. eNB1 returns an E-RAB setup response to the MME, which carries the IP address and TEID of eNB1. So far, the establishment of the direct communication path between UE1, eNB1, eNB2, and UE2 is completed.

实施例三：Embodiment 3:

参见图7，路径建立过程包括步骤： Referring to Figure 7, the path establishment process includes the steps:

701.MME获得eNB1与eNB2是否可以建立直接通信链路的信息。701. The MME obtains information on whether eNB1 and eNB2 can establish a direct communication link.

702.UE和网络执行基于网络的邻近发现过程，MME在该过程中获得UE1和UE2当前驻留基站的标识eNB1和eNB2。702. The UE and the network perform a network-based proximity discovery process, in which the MME obtains the identifiers eNB1 and eNB2 of the base station where UE1 and UE2 are currently camped.

703.UE1向MME发送邻近通信建立请求，其中携带UE1和UE2标识。703. UE1 sends a proximity communication setup request to the MME, where the UE1 and UE2 identifiers are carried.

704.MME向eNB1发出直接路径隧道信息请求获得eNB1用于直接路径建立的IP地址和GTP端口号。704. The MME sends a direct path tunnel information request to the eNB1 to obtain an IP address and a GTP port number used by the eNB1 for direct path establishment.

705.eNB1向MME返回直接路径隧道信息响应，其中包含用于邻近通信的IP地址和TEID。705. eNB1 returns a direct path tunnel information response to the MME containing the IP address and TEID for the proximity communication.

后续步骤同实施例二中的步骤605-610，即The subsequent steps are the same as steps 605-610 in the second embodiment, that is,

MME向eNB2发送E-UTRAN无线接入承载(E-UTRAN Radio Access Bearer，E-RAB)建立请求消息，其中携带eNB1IP地址和TEID。The MME sends an E-UTRAN Radio Access Bearer (E-RAB) setup request message to the eNB2, which carries the eNB1 IP address and the TEID.

eNB2发起RRC重配过程，建立与UE2之间用于邻近通信的无线承载。The eNB2 initiates an RRC reconfiguration procedure to establish a radio bearer for the proximity communication with the UE2.

eNB2向MME返回E-RAB建立响应，其中携带eNB2为直接路径分配的TEID，以及eNB2用于直接通信的IP地址。The eNB2 returns an E-RAB setup response to the MME, which carries the TEID assigned by the eNB2 for the direct path and the IP address that the eNB2 uses for direct communication.

MME向eNB1发送E-RAB建立请求消息，其中携带eNB2IP地址和TEID，以及一个非接入层(Non Access Stratum，NAS)分组数据单元(Packet Data Unit，PDU)，该PDU为MME发送给UE的邻近通信建立响应消息。The MME sends an E-RAB setup request message to the eNB1, which carries the eNB2 IP address and the TEID, and a Non-Access Stratum (NAS) Packet Data Unit (PDU), which is sent by the MME to the UE. The proximity communication establishes a response message.

eNB1发起RRC重配过程，建立与UE1之间用于邻近通信的无线承载。eNB1在RRC重配过程中将NAS PDU发给UE1.The eNB1 initiates an RRC reconfiguration procedure to establish a radio bearer for the proximity communication with the UE1. eNB1 sends the NAS PDU to UE1 during the RRC reconfiguration process.

eNB1向MME返回E-RAB建立响应，其中携带eNB1的IP地址和TEID。至此，UE1、eNB1、eNB2、UE2之间的直接通信路径建立完成。The eNB1 returns an E-RAB setup response to the MME, which carries the IP address and TEID of the eNB1. So far, the establishment of the direct communication path between UE1, eNB1, eNB2, and UE2 is completed.

实施例四：Embodiment 4:

参见图8，路径建立过程包括步骤：Referring to Figure 8, the path establishment process includes the steps:

801.MME获得eNB1与eNB2是否可以建立直接通信链路的信息。801. The MME obtains information on whether eNB1 and eNB2 can establish a direct communication link.

802.UE和网络执行基于网络的邻近发现过程，MME在该过程中获得UE1和UE2当前驻留基站的标识eNB1和eNB2。The 802. UE and the network perform a network-based proximity discovery process, in which the MME obtains the identifiers eNB1 and eNB2 of the UE1 and UE2 currently camping on the base station.

803.基于邻近发现结果和步骤801，MME判断UE1和UE2可以建立经由eNB1和eNB2的通信，则向eNB1发起路径建立触发命令，其中携带eNB2的标识，以及透明容器Container，该Container中携带eNB2在S1接口上的标识eNB2UE S1AP ID，MME通过现有技术即可获得和保存该标识，其中，Container中携带eNB2在S1接口上的标识eNB2UE S1AP ID，即为用于第二基站确定第二UE的标识信息。803. Based on the proximity discovery result and step 801, the MME determines that UE1 and UE2 can establish communication via eNB1 and eNB2, and then initiates a path establishment trigger command to eNB1, where the identifier of eNB2 is carried, and a transparent container Container, which carries eNB2 in the Container. The identifier of the eNB2 UE S1AP ID on the S1 interface, the MME can obtain and save the identifier by using the existing technology, where the identifier carries the identifier eNB2UE S1AP ID of the eNB2 on the S1 interface, that is, the second UE determines the second UE. Identification information.

804.eNB1根据上一步收到的eNB2标识，向eNB2发出路径建立请求，其中携带eNB1用于邻近通信的IP地址和TEID，以及eNB1为与eNB2之间的直接路径分配的标识eNB1X2路径(Path)ID。eNB1将Container包含在消息中发送给eNB2.804. The eNB1 sends a path establishment request to the eNB2 according to the eNB2 identifier received in the previous step, where the eNB1 carries the IP address and the TEID for the proximity communication, and the eNB1 is the eNB1X2 path (Path) assigned to the direct path between the eNB2 and the eNB2. ID. eNB1 includes the Container in the message and sends it to eNB2.

805.eNB2收到路径建立请求消息后，解析其中的Container，根据eNB2UE S1AP ID可知需要为UE2建立直接路径。eNB2与UE2进行RRC重配。805. After receiving the path establishment request message, the eNB2 resolves the Container, and according to the eNB2 UE S1AP ID, it needs to establish a direct path for the UE2. eNB2 performs RRC reconfiguration with UE2.

806.eNB2分配用于直接路径标识的eNB2X2Path ID。eNB2向eNB1返回路径建立响应消息，其中包括eNB2用于邻近通信的IP地址和TEID，以及直接路径标识eNB2X2Path ID。 806. eNB2 allocates an eNB2X2Path ID for direct path identification. The eNB2 returns a Path Setup Response message to the eNB1, including the IP address and TEID used by the eNB2 for the proximity communication, and the direct path identifier eNB2X2Path ID.

807.eNB1与UE1进行RRC重配。807. eNB1 performs RRC reconfiguration with UE1.

808.eNB1向MME返回路径建立触发响应消息。808. eNB1 returns a path setup trigger response message to the MME.

实施例五：Embodiment 5:

当eNB1和eNB2所属的核心网设备不同时，参见图9，路径建立过程包括步骤：When the core network devices to which eNB1 and eNB2 belong are different, referring to FIG. 9, the path establishment process includes the following steps:

901.MME根据配置或者非UE相关的信令获知基站的直接接口信息。901. The MME learns the direct interface information of the base station according to the configuration or non-UE related signaling.

902.UE1和UE2进行邻近发现过程。902. UE1 and UE2 perform a proximity discovery process.

903.UE1向MME1发出邻近通信建立请求消息，其中携带UE1和UE2的标识。MME1根据UE2的标识获知其所属的MME2.具体过程见下面的实施例六。903. UE1 sends a proximity communication setup request message to MME1, where the identifiers of UE1 and UE2 are carried. The MME1 learns the MME2 to which it belongs according to the identifier of the UE2. For the specific procedure, see Embodiment 6 below.

904.MME1向eNB1发送路径请求消息。904. MME1 sends a path request message to eNB1.

905.eNB1向MME1返回路径响应，其中包含eNB1用于直接通信的IP地址和端口号信息。905. eNB1 returns a path response to MME1, which contains IP address and port number information used by eNB1 for direct communication.

906.MME1向MME2发送直接路径隧道建立请求，其中包含eNB1用于直接通信的IP地址和端口号信息。906. MME1 sends a direct path tunnel setup request to MME2, which includes IP address and port number information used by eNB1 for direct communication.

907.MME2向eNB2发送直接路径隧道建立请求，其中包含eNB1用于直接通信的IP地址和端口号信息。907. The MME2 sends a direct path tunnel establishment request to the eNB2, which includes the IP address and port number information used by the eNB1 for direct communication.

908.eNB2与UE2进行RRC重配，建立直接通信相关的空口承载。908. eNB2 performs RRC reconfiguration with UE2 to establish an air interface bearer related to direct communication.

909.eNB2向MME2返回直接路径隧道建立响应，其中包含eNB2用于直接通信的IP地址和端口号信息。909. eNB2 returns a direct path tunnel setup response to MME2, which contains IP address and port number information used by eNB2 for direct communication.

910.MME2向MME1返回直接路径隧道建立响应，其中包含eNB2用于直接通信的IP地址和端口号信息。910. MME2 returns a direct path tunnel setup response to MME1, which includes IP address and port number information used by eNB2 for direct communication.

911.MME1向eNB1发送直接路径隧道建立请求，其中包含eNB2用于直接通信的IP地址和端口号信息。911. MME1 sends a direct path tunnel establishment request to eNB1, which contains IP address and port number information used by eNB2 for direct communication.

912.eNB1与UE1进行RRC重配，建立直接通信相关的空口承载。912. eNB1 performs RRC reconfiguration with UE1 to establish an air interface bearer related to direct communication.

913.eNB1向MME1返回直接路径隧道建立响应。913. eNB1 returns a direct path tunnel setup response to MME1.

通过上述过程，UE1、eNB1、eNB2和UE2之间的直接通信路径建立完毕。Through the above process, the direct communication path between UE1, eNB1, eNB2, and UE2 is established.

实施例六：Example 6:

当UE1和UE2所属的核心网设备不同时，UE1的核心网设备获知UE2所属的核心网设备的方法参见图10，包括：When the core network device to which the UE1 and the UE2 belong are different, the method for the core network device of the UE1 to learn the core network device to which the UE2 belongs is shown in FIG. 10, and includes:

1001.UE1向MME1发送邻近通信请求消息，其中包含UE1和UE2的标识。UE2的标识为UE2的ProSe ID(邻近通信标识)。1001. UE1 sends a proximity communication request message to MME1, which includes the identifiers of UE1 and UE2. The identity of UE2 is the ProSe ID (proximity communication identity) of UE2.

1002.MME1向网络中的ProSe Function发送标识请求，其中携带UE2的ProSe ID。1002. The MME1 sends an identifier request to the ProSe Function in the network, where the ProSe ID of the UE2 is carried.

1003.ProSe Function从标识映射可知UE2的永久标识。1003. ProSe Function The identity identifier of UE2 is known from the identity mapping.

1004.ProSe Function通过UE2的永久标识，向HSS查询UE2当前注册的MME，获得MME2的标识。1004. The ProSe Function queries the HSS for the MME currently registered by the UE2 through the permanent identifier of the UE2, and obtains the identifier of the MME2.

1005.ProSe Function向MME1返回标识响应消息，其中携带MME2标识。1005. The ProSe Function returns an identity response message to the MME1, where the MME2 identifier is carried.

综上，参见图11，在核心网设备侧，本发明实施例提供的一种路径建立方法包括步骤：In summary, referring to FIG. 11, in a core network device side, a path establishment method provided by an embodiment of the present invention includes the following steps:

S101、核心网设备确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路； S101. The core network device determines that the first base station where the first UE resides and the second base station where the second UE resides may establish a communication link.

S102、核心网设备发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。S102. The core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.

相应地，参见图12，在接入网侧，本发明实施例提供的一种路径建立方法包括步骤：Correspondingly, referring to FIG. 12, on the access network side, a path establishment method provided by an embodiment of the present invention includes the following steps:

S201、第二UE驻留的第二基站接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；S201. The second base station, where the second UE resides, receives a path setup request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried.

S202、第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；S202. The second base station performs an RRC reconfiguration process with the second UE, and establishes a radio bearer for direct communication between the second base station and the second UE.

S203、第二基站向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；S203. The second base station returns a path setup response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included.

S204、第一基站接收核心网设备发送的路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号；S204. The first base station receives a path setup request message sent by the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are carried.

S205、第一基站与第一UE进行RRC重配过程，建立第一基站与第一UE之间用于直接通信的无线承载；S205. The first base station performs an RRC reconfiguration process with the first UE, and establishes a radio bearer for direct communication between the first base station and the first UE.

S206、第一基站向核心网设备返回路径建立响应消息，其中包含第一基站自身用于直接通信的IP地址和端口号。S206. The first base station returns a path setup response message to the core network device, where the IP address and port number used by the first base station itself for direct communication are included.

相应地，参见图13，在接入网侧，本发明实施例提供的另一种路径建立方法包括步骤：Correspondingly, referring to FIG. 13, on the access network side, another path establishment method provided by the embodiment of the present invention includes the following steps:

S301、第一UE驻留的第一基站接收核心网设备发送的路径建立触发命令，其中携带第二基站标识，以及用于第二基站确定UE的标识信息；S301: The first base station that is camped by the first UE receives a path setup trigger command sent by the core network device, where the second base station identifier is carried, and the second base station determines the identifier information of the UE.

S302、第一基站向第二UE驻留的第二基站发送路径建立请求消息，其中携带第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息；S302. The first base station sends a path setup request message to the second base station where the second UE resides, where the first base station carries the IP address and tunnel port number of the direct communication user plane, the first base station control plane identifier, and is used for The second base station determines identification information of the UE;

S303、第二基站根据第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，第二基站与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；S303. The second base station is configured to establish a direct communication path with the second UE according to the path setup request message sent by the first base station, and the second base station performs an RRC reconfiguration process with the second UE to establish a relationship between the second base station and the second UE. Radio bearer for direct communication;

S304、第二基站向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识；S304. The second base station returns a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

S305、第一基站与第一UE进行RRC重配，并且第一基站向核心网设备返回路径建立触发响应消息。S305. The first base station performs RRC reconfiguration with the first UE, and the first base station returns a path establishment trigger response message to the core network device.

参见图14，本发明实施例提供的一种核心网设备包括：Referring to FIG. 14, a core network device according to an embodiment of the present invention includes:

确定单元11，用于确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；The determining unit 11 is configured to determine that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link;

发起单元12，用于发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。The initiating unit 12 is configured to initiate establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.

较佳地，所述确定单元11采用下列方式之一确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路：Preferably, the determining unit 11 determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link in one of the following manners:

方式二：在建立与第一基站之间的非用户设备UE相关连接时，获取该第一基站上报的与该第一基站有直接接口的第二基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；或者，在建立与第二基站之间的非UE相关连接时，获取该第二基站上报的与该第二基站有直接接口的第一基站的信息，从而确定第一基站与第二基站之间可以建立通信链路；Manner 2: When the non-user equipment UE related connection between the first base station and the first base station is established, the first base station reports the Information about the second base station having direct interface with the first base station, thereby determining that a communication link can be established between the first base station and the second base station; or acquiring when establishing a non-UE related connection with the second base station Determining, by the second base station, information of the first base station that has a direct interface with the second base station, so as to determine that a communication link can be established between the first base station and the second base station;

较佳地，所述发起单元12，具体用于：Preferably, the initiating unit 12 is specifically configured to:

或者，所述发起单元12，具体用于：Alternatively, the initiating unit 12 is specifically configured to:

向第一基站发送路径建立请求消息，其中携带第二基站用于直接通信的IP地址和隧道端口号；所述第一基站收到所述路径建立触发命令后，向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于所述第二基站确定UE的标识信息；所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；接收第一基站返回的路径建立响应消息。Sending a path setup request message to the first base station, where the second base station carries the IP address and the tunnel port number used for direct communication; after receiving the path establishment trigger command, the first base station sends a path to the second base station Establishing a request message, where the IP address and tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the identifier information used by the second base station to determine the UE are carried; The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs radio resources with the second UE. And controlling a RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE, and receiving a path setup response message returned by the first base station.

较佳地，所述发起单元向第一基站发送直接路径隧道信息请求消息，并接收第一基站返回的第一基站用于直接通信的IP地址和隧道端口号；或者，所述发起单元向第一基站发送询问消息，并从第一基站返回的接受消息中获得第一基站用于直接通信的IP地址和隧道端口号。Preferably, the initiating unit sends a direct path tunnel information request message to the first base station, and receives an IP address and a tunnel port number used by the first base station for direct communication returned by the first base station; or, the initiating unit goes to the first A base station transmits an inquiry message and obtains an IP address and a tunnel port number used by the first base station for direct communication from the acceptance message returned by the first base station.

参见图15，本发明实施例提供的另一种核心网设备包括：存储器230和处理器240。Referring to FIG. 15, another core network device provided by an embodiment of the present invention includes: a memory 230 and a processor 240.

其中，处理器240被配置了用于执行上述核心网设备侧的方法的计算机程序等，从而实现本发明实施例中所述的核心网设备侧的功能；存储器230，用于存储该计算机程序的代码，可以被用于配置所述处理器240；处理器240根据实际需要可以包括基带处理部件、射频处理部件等设备，可以实现数据的收发功能。下面给出存储器230和处理器240的具体的功能介绍。The processor 240 is configured with a computer program or the like for performing the method on the core network device side to implement the function of the core network device side described in the embodiment of the present invention; the memory 230 is configured to store the computer program. The code may be used to configure the processor 240; the processor 240 may include a baseband processing component and a radio frequency according to actual needs. Equipment such as components can realize data transmission and reception. A detailed description of the functions of the memory 230 and the processor 240 is given below.

处理器240，用于确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；The processor 240 is configured to determine that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link;

处理器240，用于发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径。The processor 240 is configured to initiate establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.

较佳地，所述处理器240采用下列方式之一确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路：Preferably, the processor 240 determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link in one of the following manners:

较佳地，所述处理器240，具体用于：Preferably, the processor 240 is specifically configured to:

或者，所述处理器240，具体用于：Alternatively, the processor 240 is specifically configured to:

向第一基站发送路径建立触发命令，其中携带第二基站标识以及用于第二基站确定UE的标识信息； Sending a path establishment trigger command to the first base station, where the second base station identifier is used, and the identifier information used by the second base station to determine the UE is used;

本发明实施例提供的一种路径建立***，包括：第一UE驻留的第一基站和第二UE驻留的第二基站，其中，The path establishment system provided by the embodiment of the present invention includes: a first base station where the first UE resides and a second base station where the second UE resides, where

第二基站用于：The second base station is used to:

第一基站用于：The first base station is used to:

向核心网设备返回路径建立响应消息，其中包含第一基站自身用于直接通信的IP地址和端口号。A path setup response message is returned to the core network device, including the IP address and port number used by the first base station itself for direct communication.

当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。较佳地，该接受消息中还包括第一基站用于直接通信的IP地址和隧道端口号。When it is determined according to the second base station identifier that a communication link can be established between the first base station and the second base station, an accept message is returned to the core network device. Preferably, the accept message further includes an IP address and a tunnel port number used by the first base station for direct communication.

本发明实施例通过的一种路径建立***，包括：第一UE驻留的第一基站和第二UE驻留的第二基站，其中，A path establishment system that is adopted by the embodiment of the present invention includes: a first base station where the first UE resides and a second base station where the second UE resides, where

第一基站用于：The first base station is used to:

向第二UE驻留的第二基站发送路径建立请求消息，其中携带第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息； Sending a path setup request message to the second base station where the second UE camps, where the first base station carries the IP address and tunnel port number of the direct communication user plane, the first base station control plane identifier, and the second base station determines the UE Identification information;

第二基站用于：The second base station is used to:

较佳地，第一基站还用于：接收核心网设备发送的直接路径隧道信息请求消息，并返回第一基站用于直接通信的IP地址和隧道端口号给核心网设备；或者，接收核心网设备发送的询问消息，并返回接受消息，其中携带第一基站用于直接通信的IP地址和隧道端口号。Preferably, the first base station is further configured to: receive a direct path tunnel information request message sent by the core network device, and return an IP address and a tunnel port number used by the first base station for direct communication to the core network device; or receive the core network. The inquiry message sent by the device returns an accept message carrying the IP address and tunnel port number used by the first base station for direct communication.

较佳地，第一基站还用于：当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。较佳地，该接受消息中还包括第一基站用于直接通信的IP地址和隧道端口号。Preferably, the first base station is further configured to: when determining, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device. Preferably, the accept message further includes an IP address and a tunnel port number used by the first base station for direct communication.

参见图16、本发明实施例提供的一种路径建立设备，例如可以是基站，包括：Referring to FIG. 16, a path establishing device, which may be a base station, is provided in the embodiment of the present invention, and includes:

第一单元161，用于接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；The first unit 161 is configured to receive a path setup request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried;

第二单元162，用于与第二UE进行RRC重配过程，建立在所述设备与第二UE之间用于直接通信的无线承载；The second unit 162 is configured to perform an RRC reconfiguration process with the second UE, and establish a radio bearer for direct communication between the device and the second UE.

第三单元163，用于向核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号。The third unit 163 is configured to return a path establishment response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included.

较佳地，所述第三单元163还用于：Preferably, the third unit 163 is further configured to:

较佳地，所述第一单元161还用于：接收核心网设备发送的该第一基站与第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Preferably, the first unit 161 is further configured to: receive an inquiry message of whether a communication link can be established between the first base station and the second base station, where the core network device carries the second base station identifier;

所述第三单元163还用于：当根据第二基站标识确定第一基站与该第二基站之间可以建立通信链路时，向核心网设备返回接受消息。The third unit 163 is further configured to: when determining, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.

本发明实施例提供的另一种路径建立设备，例如可以是基站，也具有图16所示的结构，具体包括： Another path establishing device provided by the embodiment of the present invention may be, for example, a base station, and has the structure shown in FIG.

第一单元161，用于接收核心网设备发送的路径建立触发命令，其中携带第二UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；The first unit 161 is configured to receive a path setup trigger command sent by the core network device, where the second base station identifier that the second UE camps on, and the second base station determine the identifier information of the UE.

第三单元163，用于向第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于第二基站确定UE的标识信息；The third unit 163 is configured to send a path setup request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the second base station are used. Determining identification information of the UE;

第二单元162，用于与第一UE进行RRC重配，并且向核心网设备返回路径建立触发响应消息。The second unit 162 is configured to perform RRC reconfiguration with the first UE, and return a path establishment trigger response message to the core network device.

较佳地，第二单元162还用于：根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；Preferably, the second unit 162 is further configured to: according to the path setup request message sent by the first base station where the first UE is camped, learn to establish a direct communication path to the second UE, and perform an RRC reconfiguration process with the second UE, Establishing a radio bearer for direct communication between the second base station and the second UE;

第三单元163还用于：向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The third unit 163 is further configured to: return a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

另外，本发明实施例提供的第三种路径建立设备，例如可以是基站，可以不包括上述第一单元，具体包括：In addition, the third path establishing device provided by the embodiment of the present invention may be, for example, a base station, and may not include the foregoing first unit, and specifically includes:

第二单元162，用于根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与第二UE进行RRC重配过程，建立第二基站与第二UE之间用于直接通信的无线承载；The second unit 162 is configured to: according to the path setup request message sent by the first base station where the first UE resides, learn to establish a direct communication path for the second UE, perform an RRC reconfiguration process with the second UE, and establish a second base station and a radio bearer for direct communication between the second UEs;

第三单元163，用于向第一基站返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The third unit 163 is configured to return a path setup response message to the first base station, where the IP address and tunnel port number used by the second base station for direct communication, and the second base station control plane identifier are included.

上述第一单元161、第二单元162、第三单元163的功能，均可以由处理器实现。The functions of the first unit 161, the second unit 162, and the third unit 163 described above may all be implemented by a processor.

针对上述方法流程，本发明实施例还提供一种核心网设备、一种基站以及***，该核心网设备、基站以及***的具体内容可以参照上述方法实施，在此不再赘述。For the foregoing method, the embodiment of the present invention further provides a core network device, a base station, and a system. The specific content of the core network device, the base station, and the system may be implemented by referring to the foregoing method, and details are not described herein.

如图17所示，本发明实施例提供的一种核心网设备结构图，包括：处理器1701、存储器1702；As shown in FIG. 17, a core network device structure diagram provided by an embodiment of the present invention includes: a processor 1701, a memory 1702;

所述存储器1702，用于存储一个或多个可执行程序，被用于配置所述处理器1701；The memory 1702 is configured to store one or more executable programs, and is used to configure the processor 1701;

所述处理器1701，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。The processor 1701 is configured with one or more executable programs, and the one or more executable programs are configured to perform a method for determining a first base station and a second UE where the first user equipment UE camps The second base station that camps on can establish a communication link; for initiating establishment of the first base station and the first UE between the first UE and the second UE The direct communication path of the two base stations.

较佳的，所述处理器1701采用下列方式之一确定所述第一UE驻留的所述第一基站和所述第二UE驻留的所述第二基站可以建立通信链路：Preferably, the processor 1701 determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link in one of the following manners:

方式一：根据预先配置的所述第一基站和所述第二基站之间具有直接接口的信息，确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 1: determining, according to the pre-configured information of the direct interface between the first base station and the second base station, that a communication link can be established between the first base station and the second base station;

方式二：在建立与所述第一基站之间的非用户设备UE相关连接时，获取所述第一基站上报的与所述第一基站有直接接口的第二基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；或者，在建立与所述第二基站之间的非UE相关连接时，获取所述第二基站上报的与所述第二基站有直接接口的第一基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 2: acquiring, when establishing a non-user equipment UE-related connection with the first base station, information about the second base station that is directly interfaced with the first base station by the first base station, according to the obtained information Determining that a communication link can be established between the first base station and the second base station; or, when establishing a non-UE related connection with the second base station, acquiring the information reported by the second base station Determining, by the second base station, information of the first base station that is directly connected, and determining, according to the obtained information, that a communication link can be established between the first base station and the second base station;

方式三：通过UE相关信令向所述第一基站发送所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到所述第一基站返回的接受消息时，确定所述第一基站与所述第二基站之间可以建立通信链路；或者，通过UE相关信令向所述第二基站发送所述第二基站与所述第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到所述第二基站返回的接受消息时，确定所述第二基站与所述第一基站之间可以建立通信链路。Manner 3: Send, by using the UE related signaling, the first base station, whether an inquiry message of the communication link can be established between the first base station and the second base station, where the second base station identifier is carried, when receiving the When the receiving message is returned by the first base station, determining that a communication link can be established between the first base station and the second base station; or sending the second base station and the second base station by using UE related signaling Determining whether the first base station can establish an inquiry message of the communication link, where the first base station identifier is carried, and when receiving the accept message returned by the second base station, determining the second base station and the first base station A communication link can be established.

较佳的，所述处理器1701具体用于：Preferably, the processor 1701 is specifically configured to:

在UE的直接通信请求消息触发下，发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。A direct communication path between the first UE and the second UE via the first base station and the second base station is initiated, triggered by a direct communication request message of the UE.

获取所述第一基站用于直接通信的IP地址和隧道端口号；Obtaining an IP address and a tunnel port number used by the first base station for direct communication;

向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的IP地址和隧道端口号；接收所述第二基站返回的路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号；Sending a path setup request message to the second base station, where the first base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the second base station, where the second The IP address and tunnel port number used by the base station for direct communication;

向所述第一基站发送路径建立请求消息，其中携带所述第二基站用于直接通信的IP地址和隧道端口号；接收所述第一基站返回的路径建立响应消息。And sending a path setup request message to the first base station, where the second base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the first base station.

较佳的，所述处理器1701向所述第一基站发送直接路径隧道信息请求消息，并接收所述第一基站返回的所述第一基站用于直接通信的IP地址和隧道端口号；或者，所述发起单元向所述第一基站发送询问消息，并从所述第一基站返回的接受消息中获得所述第一基站用于直接通信的IP地址和隧道端口号。Preferably, the processor 1701 sends a direct path tunnel information request message to the first base station, and receives an IP address and a tunnel port number used by the first base station for direct communication returned by the first base station; or And the initiating unit sends an inquiry message to the first base station, and obtains an IP address and a tunnel port number used by the first base station for direct communication from an accept message returned by the first base station.

向所述第一基站发送路径建立触发命令，其中携带第二基站标识以及用于所述第二基站确定UE的标识信息；Sending a path establishment triggering command to the first base station, where the second base station identifier is used, and the second base station determines identifier information of the UE;

所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs wireless with the second UE. Resource Control RRC a matching procedure, establishing a radio bearer for direct communication between the second base station and the second UE;

接收所述第一基站返回的路径建立触发响应消息。Receiving a path setup trigger response message returned by the first base station.

其中，在图17中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1701代表的一个或多个处理器和存储器1702代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。Here, in FIG. 17, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1701 and various circuits of memory represented by memory 1702. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface.

如图18所示，本发明实施例提供的一种基站结构图，包括：处理器1801、存储器1802、收发机1803；As shown in FIG. 18, a base station structure diagram according to an embodiment of the present invention includes: a processor 1801, a memory 1802, and a transceiver 1803;

所述存储器1802，用于存储一个或多个可执行程序，被用于配置所述处理器1801；The memory 1802 is configured to store one or more executable programs, and is used to configure the processor 1801;

所述收发机1803，用于在所述处理器1801的控制下接收和发送数据；The transceiver 1803 is configured to receive and send data under the control of the processor 1801;

所述处理器1801，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于接收核心网设备发送的路径建立请求消息，其中携带第一用户设备UE驻留的第一基站用于直接通信的IP地址和隧道端口号；或者，携带第二UE驻留的第二基站用于直接通信的IP地址和隧道端口号；The processor 1801 is configured with one or more executable programs, where the one or more executable programs are configured to: receive a path setup request message sent by a core network device, where the first user is carried The IP address and the tunnel port number used by the first base station where the device UE resides for direct communication; or the IP address and tunnel port number used by the second base station where the second UE resides for direct communication;

较佳的，所述处理器1801还用于：Preferably, the processor 1801 is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.

接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the core network device, whether an inquiry message of a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And determining, when the communication link is established between the first base station and the second base station, according to the second base station identifier, returning an accept message to the core network device.

其中，在图18中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1801代表的一个或多个处理器和存储器1802代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1803可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1801负责管理总线架构和通常的处理，存储器1802可以存储处理器1801在执行操作时所使用的数据。Wherein, in FIG. 18, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1801 and various circuits of memory represented by memory 1802. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 1803 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 1801 is responsible for managing the bus architecture and general processing, and the memory 1802 can store data used by the processor 1801 in performing operations.

如图19所示，本发明实施例提供的一种基站结构图，包括：处理器1901、存储器1902、收发机1903； As shown in FIG. 19, a base station structure diagram provided by an embodiment of the present invention includes: a processor 1901, a memory 1902, and a transceiver 1903;

所述存储器1902，用于存储一个或多个可执行程序，被用于配置所述处理器1901；The memory 1902 is configured to store one or more executable programs, and is used to configure the processor 1901;

所述收发机1903，用于在所述处理器1901的控制下接收和发送数据；The transceiver 1903 is configured to receive and send data under the control of the processor 1901;

所述处理器1901，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息；The processor 1901 is configured with one or more executable programs, where the one or more executable programs are configured to: receive a path establishment trigger command sent by a core network device, where the second user is carried a second base station identifier that the device UE camps on, and identifier information used by the second base station to determine the UE; and configured to send a path setup request message to the second base station, where the IP of the user plane used by the first base station for direct communication is carried An address and a tunnel port number, a first base station control plane identifier, and identifier information used by the second base station to determine the UE, configured to perform radio resource control RRC reconfiguration with the first UE, and to the core network device Return path establishment trigger response message;

较佳的，所述处理器1901还用于：Preferably, the processor 1901 is further configured to:

根据所述第一UE驻留的所述第一基站发送的路径建立请求消息，获知要对所述第二UE建立直接通信路径，与所述第二UE进行RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；Determining, according to the path setup request message sent by the first base station, the first UE to establish a direct communication path, and performing an RRC reconfiguration process with the second UE to establish the first a radio bearer for direct communication between the second base station and the second UE;

向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。Returning a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.

其中，在图19中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1901代表的一个或多个处理器和存储器1902代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1903可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1901负责管理总线架构和通常的处理，存储器1902可以存储处理器1901在执行操作时所使用的数据。Here, in FIG. 19, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1901 and various circuits of memory represented by memory 1902. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 1903 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 1901 is responsible for managing the bus architecture and general processing, and the memory 1902 can store data used by the processor 1901 when performing operations.

如图20所示，本发明实施例提供了一种路径建立***，该***包括：核心网设备2001和基站2002，其中，As shown in FIG. 20, an embodiment of the present invention provides a path establishment system, where the system includes: a core network device 2001 and a base station 2002, where

所述核心网设备2001用于：The core network device 2001 is used to:

确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径；Determining that the first base station where the first user equipment UE camps and the second base station where the second UE camps may establish a communication link; and initiating establishing between the first UE and the second UE via the Directly between a base station and the second base station Communication path

所述基站2002用于：The base station 2002 is used to:

如图21所示，本发明实施例提供了一种路径建立***，该***包括：核心网设备2101和基站2102，其中，As shown in FIG. 21, an embodiment of the present invention provides a path establishment system, where the system includes: a core network device 2101 and a base station 2102, where

所述核心网设备2101用于：The core network device 2101 is configured to:

所述基站2102用于：The base station 2102 is configured to:

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

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

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

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

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

Claims

一种路径建立方法，其特征在于，该方法包括：A path establishing method, the method comprising:

核心网设备确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；The core network device determines that the first base station where the first user equipment UE camps and the second base station where the second UE resides may establish a communication link;

所述核心网设备发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。The core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.
根据权利要求1所述的方法，其特征在于，所述核心网设备确定第一UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路，包括下列方式之一：The method according to claim 1, wherein the core network device determines that the first base station where the first UE camps and the second base station where the second UE resides can establish a communication link, including one of the following ways:

方式一：所述核心网设备根据预先配置的所述第一基站和所述第二基站之间具有直接接口的信息，确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 1: The core network device determines that a communication link can be established between the first base station and the second base station according to the pre-configured information of the direct interface between the first base station and the second base station. ;

方式二：所述核心网设备在建立与所述第一基站之间的非UE相关连接时，获取所述第一基站上报的与所述第一基站有直接接口的第二基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；或者，所述核心网设备在建立与所述第二基站之间的非UE相关连接时，获取所述第二基站上报的与所述第二基站有直接接口的第一基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 2: The core network device acquires information about the second base station that is directly interfaced with the first base station by the first base station when establishing a non-UE related connection with the first base station, according to Obtaining information that a communication link can be established between the first base station and the second base station; or, when the core network device establishes a non-UE related connection with the second base station, acquiring the location Determining, by the second base station, information about the first base station that has a direct interface with the second base station, and determining, according to the obtained information, that a communication link can be established between the first base station and the second base station;

方式三：所述核心网设备通过UE相关信令向所述第一基站发送所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到所述第一基站返回的接受消息时，所述核心网设备确定所述第一基站与所述第二基站之间可以建立通信链路；或者，所述核心网设备通过UE相关信令向所述第二基站发送所述第二基站与所述第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到所述第二基站返回的接受消息时，所述核心网设备确定所述第二基站与所述第一基站之间可以建立通信链路。Manner 3: The core network device sends, by using the UE-related signaling, the inquiry message of the communication link between the first base station and the second base station to the first base station, where the second base station identifier is carried. When receiving the accept message returned by the first base station, the core network device determines that a communication link can be established between the first base station and the second base station; or the core network device passes the UE related information. Sending, to the second base station, an inquiry message that whether a communication link can be established between the second base station and the first base station, where the first base station identifier is carried, and an accept message returned by the second base station is received The core network device determines that a communication link can be established between the second base station and the first base station.
根据权利要求1所述的方法，其特征在于，所述核心网设备发起建立第一UE和第二UE之间的经由第一基站和第二基站的直接通信路径，包括：The method according to claim 1, wherein the core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station, including:

所述核心网设备在UE的直接通信请求消息触发下，发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。The core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station, triggered by a direct communication request message of the UE.
根据权利要求1所述的方法，其特征在于，所述核心网设备发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径，包括：The method according to claim 1, wherein the core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station ,include:

所述核心网设备获取所述第一基站用于直接通信的IP地址和隧道端口号；Obtaining, by the core network device, an IP address and a tunnel port number used by the first base station for direct communication;

所述核心网设备向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的IP地址和隧道端口号；所述核心网设备接收所述第二基站返回的路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号；The core network device sends a path establishment request message to the second base station, where the first base station carries an IP address and a tunnel port number for direct communication; and the core network device receives the path returned by the second base station. Establishing a response message including an IP address and a tunnel port number used by the second base station for direct communication;

所述核心网设备向所述第一基站发送路径建立请求消息，其中携带所述第二基站用于直接通信的IP地址和隧道端口号，所述核心网设备接收所述第一基站返回的路径建立响应消息。The core network device sends a path establishment request message to the first base station, where the second base station carries an IP address and a tunnel port number for direct communication, and the core network device receives the path returned by the first base station. Establish a response message.
根据权利要求4所述的方法，其特征在于，所述核心网设备获取所述第一基站用于直接通信的IP地址和隧道端口号，包括：The method according to claim 4, wherein the core network device acquires an IP address and a tunnel port number used by the first base station for direct communication, including:

所述核心网设备向所述第一基站发送直接路径隧道信息请求消息，并接收所述第一基站返回的所述第一基站用于直接通信的IP地址和隧道端口号；或者，所述核心网设备向所述第一基站发送询问消息，并从所述第一基站返回的接受消息中获得所述第一基站用于直接通信的IP地址和隧道端口号。The core network device sends a direct path tunnel information request message to the first base station, and receives the first base station Returning the first base station for the IP address of the direct communication and the tunnel port number; or the core network device sends an inquiry message to the first base station, and obtains the received message from the first base station The IP address and tunnel port number used by the first base station for direct communication.
根据权利要求1所述的方法，其特征在于，所述核心网设备发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径，包括：The method according to claim 1, wherein the core network device initiates establishing a direct communication path between the first UE and the second UE via the first base station and the second base station ,include:

所述核心网设备向所述第一基站发送路径建立触发命令，其中携带第二基站标识以及用于所述第二基站确定UE的标识信息；The core network device sends a path establishment trigger command to the first base station, where the second base station identifier is used, and the second base station determines the identity information of the UE.

所述第一基站收到所述核心网设备发送的路径建立触发命令后，向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于所述第二基站确定UE的标识信息；After receiving the path establishment triggering command sent by the core network device, the first base station sends a path establishment request message to the second base station, where the IP address of the user plane used by the first base station for direct communication is carried. a tunnel port number, a first base station control plane identifier, and the identifier information used by the second base station to determine the UE;

所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs wireless with the second UE. a resource control RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE;

所述第二基站向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识；Returning, by the second base station, a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number used for direct communication, and a second base station control plane identifier;

所述核心网设备接收所述第一基站返回的路径建立触发响应消息。The core network device receives a path setup trigger response message returned by the first base station.
一种路径建立方法，其特征在于，该方法包括：A path establishing method, the method comprising:

第二用户设备UE驻留的第二基站接收核心网设备发送的路径建立请求消息，其中携带第一UE驻留的第一基站用于直接通信的IP地址和隧道端口号；The second base station that the second user equipment UE camps on receives the path establishment request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first UE resides for direct communication are carried;

所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station performs a radio resource control RRC reconfiguration process with the second UE, and establishes a radio bearer for direct communication between the second base station and the second UE;

所述第二基站向所述核心网设备返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号。The second base station returns a path setup response message to the core network device, where the second base station includes an IP address and a tunnel port number for direct communication.
根据权利要求7所述的方法，其特征在于，该方法还包括：The method of claim 7 further comprising:

所述第二基站在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When the second base station establishes a non-UE related connection with the core network device, the second base station reports information of the base station that has a direct interface with itself to the core network device.
一种路径建立方法，其特征在于，该方法包括：A path establishing method, the method comprising:

第一用户设备UE驻留的第一基站接收核心网设备发送的路径建立请求消息，其中携带第二UE驻留的第二基站用于直接通信的IP地址和隧道端口号；The first base station that the first user equipment UE camps on receives the path establishment request message sent by the core network device, where the second base station that the second UE camps on carries the IP address and the tunnel port number used for direct communication;

所述第一基站与所述第一UE进行无线资源控制RRC重配过程，建立所述第一基站与所述第一UE之间用于直接通信的无线承载；The first base station performs a radio resource control RRC reconfiguration process with the first UE, and establishes a radio bearer for direct communication between the first base station and the first UE;

所述第一基站向所述核心网设备返回路径建立响应消息。The first base station returns a path setup response message to the core network device.
根据权利要求9所述的方法，其特征在于，该方法还包括：The method of claim 9 further comprising:

所述第一基站在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When the first base station establishes a non-UE related connection with the core network device, the first base station reports information of the base station that has a direct interface with itself to the core network device.
根据权利要求9所述的方法，其特征在于，该方法还包括：The method of claim 9 further comprising:

所述第一基站接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识； The first base station receives an inquiry message that the first base station and the second base station that are sent by the core network device can establish a communication link, where the second base station identifier is carried;

当所述第一基站根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And when the first base station determines, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.
一种路径建立方法，其特征在于，该方法包括：A path establishing method, the method comprising:

第一用户设备UE驻留的第一基站接收核心网设备发送的路径建立触发命令，其中携带第二基站标识，以及用于第二基站确定UE的标识信息；The first base station, where the first user equipment UE is camped, receives a path setup trigger command sent by the core network device, where the second base station identifier is carried, and the second base station determines the identifier information of the UE.

所述第一基站向所述第二UE驻留的所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；The first base station sends a path setup request message to the second base station where the second UE is camped, where the first base station carries the IP address and tunnel port number of the direct communication user plane, and the first base station controls a face identifier, and identifier information used by the second base station to determine the UE;

所述第一基站与所述第一UE进行无线资源控制RRC重配，并且所述第一基站向所述核心网设备返回路径建立触发响应消息。The first base station performs radio resource control RRC reconfiguration with the first UE, and the first base station returns a path establishment trigger response message to the core network device.
根据权利要求12所述的方法，其特征在于，该方法还包括：The method of claim 12, further comprising:

所述第一基站在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When the first base station establishes a non-UE related connection with the core network device, the first base station reports information of the base station that has a direct interface with itself to the core network device.
根据权利要求12所述的方法，其特征在于，该方法还包括：The method of claim 12, further comprising:

所述第一基站接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；The first base station receives an inquiry message that the first base station and the second base station that are sent by the core network device can establish a communication link, where the second base station identifier is carried;

当所述第一基站根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And when the first base station determines, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.
一种路径建立方法，其特征在于，该方法包括：A path establishing method, the method comprising:

第二用户设备UE驻留的第二基站根据第一UE驻留的第一基站发送的路径建立请求消息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与第二UE之间用于直接通信的无线承载；The second base station that the second user equipment UE camps on, according to the path establishment request message sent by the first base station where the first UE is camped, is configured to establish a direct communication path to the second UE, where the second base station and the second base station The second UE performs a radio resource control RRC reconfiguration process, and establishes a radio bearer for direct communication between the second base station and the second UE;

所述第二基站向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The second base station returns a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.
根据权利要求15所述的方法，其特征在于，该方法还包括：The method of claim 15 further comprising:

所述第二基站在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When the second base station establishes a non-UE related connection with the core network device, the second base station reports information of the base station that has a direct interface with itself to the core network device.
一种核心网设备，其特征在于，该设备包括：A core network device, characterized in that the device comprises:

确定单元，用于确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；a determining unit, configured to determine that the first base station where the first user equipment UE camps and the second base station where the second UE resides can establish a communication link;

发起单元，用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。And an initiating unit, configured to initiate establishing a direct communication path between the first UE and the second UE via the first base station and the second base station.
根据权利要求17所述的设备，其特征在于，所述确定单元采用下列方式之一确定所述第一UE驻留的所述第一基站和所述第二UE驻留的所述第二基站可以建立通信链路：The device according to claim 17, wherein the determining unit determines, by one of the following manners, that the first base station where the first UE camps and the second base station where the second UE resides A communication link can be established:

方式一：根据预先配置的所述第一基站和所述第二基站之间具有直接接口的信息，确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 1: determining, according to the pre-configured information of the direct interface between the first base station and the second base station, that a communication link can be established between the first base station and the second base station;

方式二：在建立与所述第一基站之间的非用户设备UE相关连接时，获取所述第一基站上报的与所述第一基站有直接接口的第二基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；或者，在建立与所述第二基站之间的非UE相关连接时，获取所述第二基站上报的与所述第二基站有直接接口的第一基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 2: acquiring, when establishing a non-user equipment UE-related connection with the first base station, information about the second base station that is directly interfaced with the first base station by the first base station, according to the obtained information Information determining the first base station And establishing a communication link with the second base station; or acquiring a direct interface with the second base station reported by the second base station when establishing a non-UE related connection with the second base station; The information of the first base station determines, according to the obtained information, that a communication link can be established between the first base station and the second base station;

方式三：通过UE相关信令向所述第一基站发送所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到所述第一基站返回的接受消息时，确定所述第一基站与所述第二基站之间可以建立通信链路；或者，通过UE相关信令向所述第二基站发送所述第二基站与所述第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到所述第二基站返回的接受消息时，确定所述第二基站与所述第一基站之间可以建立通信链路。Manner 3: Send, by using the UE related signaling, the first base station, whether an inquiry message of the communication link can be established between the first base station and the second base station, where the second base station identifier is carried, when receiving the When the receiving message is returned by the first base station, determining that a communication link can be established between the first base station and the second base station; or sending the second base station and the second base station by using UE related signaling Determining whether the first base station can establish an inquiry message of the communication link, where the first base station identifier is carried, and when receiving the accept message returned by the second base station, determining the second base station and the first base station A communication link can be established.
根据权利要求17所述的设备，其特征在于，所述发起单元，具体用于：The device according to claim 17, wherein the initiating unit is specifically configured to:

在UE的直接通信请求消息触发下，发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。A direct communication path between the first UE and the second UE via the first base station and the second base station is initiated, triggered by a direct communication request message of the UE.
根据权利要求17所述的设备，其特征在于，所述发起单元，具体用于：The device according to claim 17, wherein the initiating unit is specifically configured to:

获取所述第一基站用于直接通信的IP地址和隧道端口号；Obtaining an IP address and a tunnel port number used by the first base station for direct communication;

向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的IP地址和隧道端口号；接收所述第二基站返回的路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号；Sending a path setup request message to the second base station, where the first base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the second base station, where the second The IP address and tunnel port number used by the base station for direct communication;

向所述第一基站发送路径建立请求消息，其中携带所述第二基站用于直接通信的IP地址和隧道端口号；接收所述第一基站返回的路径建立响应消息。And sending a path setup request message to the first base station, where the second base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the first base station.
根据权利要求20所述的设备，其特征在于，所述发起单元向所述第一基站发送直接路径隧道信息请求消息，并接收所述第一基站返回的所述第一基站用于直接通信的IP地址和隧道端口号；或者，所述发起单元向所述第一基站发送询问消息，并从所述第一基站返回的接受消息中获得所述第一基站用于直接通信的IP地址和隧道端口号。The device according to claim 20, wherein the initiating unit sends a direct path tunnel information request message to the first base station, and receives the first base station returned by the first base station for direct communication. An IP address and a tunnel port number; or the initiating unit sends an inquiry message to the first base station, and obtains an IP address and a tunnel used by the first base station for direct communication from an accept message returned by the first base station The port number.
根据权利要求17所述的设备，其特征在于，所述发起单元，具体用于：The device according to claim 17, wherein the initiating unit is specifically configured to:

向所述第一基站发送路径建立触发命令，其中携带第二基站标识以及用于所述第二基站确定UE的标识信息；Sending a path establishment triggering command to the first base station, where the second base station identifier is used, and the second base station determines identifier information of the UE;

所述第一基站收到所述路径建立触发命令后，向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于所述第二基站确定UE的标识信息；After receiving the path establishment triggering command, the first base station sends a path establishment request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication are carried. a base station control plane identifier, and the identifier information used by the second base station to determine the UE;

所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs wireless with the second UE. a resource control RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE;

接收所述第一基站返回的路径建立触发响应消息。Receiving a path setup trigger response message returned by the first base station.
一种路径建立设备，其特征在于，该设备包括：A path establishing device, the device comprising:

第一单元，用于接收核心网设备发送的路径建立请求消息，其中携带第一用户设备UE驻留的第一基站用于直接通信的IP地址和隧道端口号；a first unit, configured to receive a path setup request message sent by the core network device, where the IP address and the tunnel port number used by the first base station where the first user equipment UE resides for direct communication are carried;

第二单元，用于与第二UE进行无线资源控制RRC重配过程，建立在所述设备与所述第二UE之间用于直接通信的无线承载； a second unit, configured to perform a radio resource control RRC reconfiguration process with the second UE, and establish a radio bearer for direct communication between the device and the second UE;

第三单元，用于向所述核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号。And a third unit, configured to return a path setup response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included.
根据权利要求23所述的设备，其特征在于，所述第三单元还用于：The device according to claim 23, wherein the third unit is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.
根据权利要求23所述的设备，其特征在于，The device according to claim 23, wherein

所述第一单元还用于：接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；The first unit is further configured to: receive an inquiry message that the first base station and the second base station that are sent by the core network device can establish a communication link, where the second base station identifier is carried;

所述第三单元还用于：当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。The third unit is further configured to: when determining, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.
一种路径建立设备，其特征在于，该设备包括：A path establishing device, the device comprising:

第一单元，用于接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；a first unit, configured to receive a path setup trigger command sent by the core network device, where the second base station identifier that the second user equipment UE camps on, and the identifier information used by the second base station to determine the UE;

第三单元，用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；a third unit, configured to send a path setup request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the The second base station determines identification information of the UE;

第二单元，用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息。And a second unit, configured to perform radio resource control RRC reconfiguration with the first UE, and return a path establishment trigger response message to the core network device.
根据权利要求26所述的设备，其特征在于，所述第三单元还用于：The device according to claim 26, wherein the third unit is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.
根据权利要求26所述的设备，其特征在于，The device according to claim 26, wherein

所述第一单元还用于：接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；The first unit is further configured to: receive an inquiry message that the first base station and the second base station that are sent by the core network device can establish a communication link, where the second base station identifier is carried;

所述第三单元还用于：当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。The third unit is further configured to: when determining, according to the second base station identifier, that a communication link can be established between the first base station and the second base station, returning an accept message to the core network device.
根据权利要求26所述的设备，其特征在于，The device according to claim 26, wherein

所述第二单元还用于：根据所述第一UE驻留的所述第一基站发送的路径建立请求消息，获知要对所述第二UE建立直接通信路径，与所述第二UE进行RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second unit is further configured to: according to the path setup request message sent by the first base station where the first UE is camped, learn to establish a direct communication path to the second UE, and perform the direct communication path with the second UE. An RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE;

所述第三单元还用于：向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。The third unit is further configured to: return a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.
一种路径建立设备，其特征在于，该设备包括：A path establishing device, the device comprising:

第二单元，用于根据第一用户设备UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与所述第二UE进行无线资源控制RRC重配过程，建立第二基站与所述第二UE之间用于直接通信的无线承载；a second unit, configured to: according to a path setup request message sent by the first base station where the first user equipment UE is camped, to learn to establish a direct communication path for the second UE, and perform a radio resource control RRC reconfiguration process with the second UE Establishing a radio bearer for direct communication between the second base station and the second UE;

第三单元，用于向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。 And a third unit, configured to return a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.
根据权利要求30所述的设备，其特征在于，所述第三单元还用于：The device according to claim 30, wherein the third unit is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.
一种路径建立***，其特征在于，该***包括：第一用户设备UE驻留的第一基站和第二UE驻留的第二基站，其中，A path establishment system, the system includes: a first base station where a first user equipment UE camps and a second base station where a second UE resides, where

所述第二基站用于：The second base station is configured to:

接收核心网设备发送的路径建立请求消息，其中携带所述第一UE驻留的所述第一基站用于直接通信的IP地址和隧道端口号；Receiving a path establishment request message sent by the core network device, where the IP address and the tunnel port number used by the first base station to be directly communicated by the first UE are carried;

与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；Performing a radio resource control RRC reconfiguration procedure with the second UE, and establishing a radio bearer for direct communication between the second base station and the second UE;

向所述核心网设备返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号；Returning a path establishment response message to the core network device, where the IP address and tunnel port number used by the second base station for direct communication are included;

所述第一基站用于：The first base station is configured to:

接收所述核心网设备发送的路径建立请求消息，其中携带所述第二基站用于直接通信的IP地址和隧道端口号；Receiving a path establishment request message sent by the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are carried;

与所述第一UE进行RRC重配过程，建立所述第一基站与所述第一UE之间用于直接通信的无线承载；Performing an RRC reconfiguration process with the first UE to establish a radio bearer for direct communication between the first base station and the first UE;

向所述核心网设备返回路径建立响应消息。Returning a path setup response message to the core network device.
根据权利要求32所述的***，其特征在于，所述第一基站还用于：The system of claim 32, wherein the first base station is further configured to:

接收所述核心网设备发送的直接路径隧道信息请求消息，并返回所述第一基站用于直接通信的IP地址和隧道端口号给核心网设备；或者，接收所述核心网设备发送的询问消息，并返回接受消息，其中携带所述第一基站用于直接通信的IP地址和隧道端口号。Receiving a direct path tunnel information request message sent by the core network device, and returning an IP address and a tunnel port number used by the first base station for direct communication to the core network device; or receiving an inquiry message sent by the core network device And returning an accept message carrying the IP address and tunnel port number used by the first base station for direct communication.
根据权利要求32所述的***，其特征在于，所述第一基站和/或所述第二基站还用于：在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。The system according to claim 32, wherein the first base station and/or the second base station are further configured to: when establishing a non-UE related connection with the core network device, to the The core network device reports information of a base station that has a direct interface with itself.
根据权利要求32所述的***，其特征在于，所述第一基站还用于：The system of claim 32, wherein the first base station is further configured to:

接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the core network device, whether an inquiry message of a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And determining, when the communication link is established between the first base station and the second base station, according to the second base station identifier, returning an accept message to the core network device.
根据权利要求35所述的***，其特征在于，所述接受消息中还包括所述第一基站用于直接通信的IP地址和隧道端口号。The system according to claim 35, wherein said accept message further comprises an IP address and a tunnel port number used by said first base station for direct communication.
一种路径建立***，其特征在于，该***包括：第一用户设备UE驻留的第一基站和第二UE驻留的第二基站，其中，A path establishment system, the system includes: a first base station where a first user equipment UE camps and a second base station where a second UE resides, where

所述第一基站用于：The first base station is configured to:

接收核心网设备发送的路径建立触发命令，其中携带第二基站标识，以及用于所述第二基站确定UE的标识信息；Receiving a path establishment triggering command sent by the core network device, where the second base station identifier is carried, and the second base station determines the identity information of the UE;

向所述第二UE驻留的所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；Sending a path establishment request message to the second base station where the second UE resides, where the first base station is carried An IP address and a tunnel port number of the direct communication user plane, a first base station control plane identifier, and identifier information used by the second base station to determine the UE;

所述第二基站用于：The second base station is configured to:

根据所述第一基站发送的路径建立请求消息，获知要对所述第二UE建立直接通信路径；与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；Determining, according to the path setup request message sent by the first base station, a direct communication path to be established to the second UE; performing a radio resource control RRC reconfiguration process with the second UE, establishing the second base station and the a radio bearer for direct communication between the second UEs;

向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识；Returning, to the first base station, a path setup response message, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier;

所述第一基站还用于：与所述第一UE进行RRC重配，并且向所述核心网设备返回路径建立触发响应消息。The first base station is further configured to perform RRC reconfiguration with the first UE, and return a path establishment trigger response message to the core network device.
根据权利要求37所述的***，其特征在于，所述第一基站和/或所述第二基站还用于：在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。The system according to claim 37, wherein the first base station and/or the second base station are further configured to: when establishing a non-UE related connection with the core network device, to the The core network device reports information of a base station that has a direct interface with itself.
根据权利要求37所述的***，其特征在于，所述第一基站还用于：The system of claim 37, wherein the first base station is further configured to:

接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the core network device, whether an inquiry message of a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And determining, when the communication link is established between the first base station and the second base station, according to the second base station identifier, returning an accept message to the core network device.
一种核心网设备，其特征在于，该设备包括：处理器、存储器；A core network device, the device comprising: a processor and a memory;

所述存储器，用于存储一个或多个可执行程序，被用于配置所述处理器；The memory is configured to store one or more executable programs, which are used to configure the processor;

所述处理器，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。The processor is configured with one or more executable programs, and the one or more executable programs are configured to perform a method for determining a first base station and a second UE station where the first user equipment UE camps The remaining second base station may establish a communication link; and be used to initiate establishment of a direct communication path between the first UE and the second UE via the first base station and the second base station.
根据权利要求40所述的设备，其特征在于，所述处理器采用下列方式之一确定所述第一UE驻留的所述第一基站和所述第二UE驻留的所述第二基站可以建立通信链路：The device according to claim 40, wherein the processor determines, by one of the following manners, that the first base station where the first UE camps and the second base station where the second UE resides A communication link can be established:

方式一：根据预先配置的所述第一基站和所述第二基站之间具有直接接口的信息，确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 1: determining, according to the pre-configured information of the direct interface between the first base station and the second base station, that a communication link can be established between the first base station and the second base station;

方式二：在建立与所述第一基站之间的非用户设备UE相关连接时，获取所述第一基站上报的与所述第一基站有直接接口的第二基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；或者，在建立与所述第二基站之间的非UE相关连接时，获取所述第二基站上报的与所述第二基站有直接接口的第一基站的信息，根据获取到的信息确定所述第一基站与所述第二基站之间可以建立通信链路；Manner 2: acquiring, when establishing a non-user equipment UE-related connection with the first base station, information about the second base station that is directly interfaced with the first base station by the first base station, according to the obtained information Determining that a communication link can be established between the first base station and the second base station; or, when establishing a non-UE related connection with the second base station, acquiring the information reported by the second base station Determining, by the second base station, information of the first base station that is directly connected, and determining, according to the obtained information, that a communication link can be established between the first base station and the second base station;

方式三：通过UE相关信令向所述第一基站发送所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识，当接收到所述第一基站返回的接受消息时，确定所述第一基站与所述第二基站之间可以建立通信链路；或者，通过UE相关信令向所述第二基站发送所述第二基站与所述第一基站之间是否可以建立通信链路的询问消息，其中携带第一基站标识，当接收到所述第二基站返回的接受消息时，确定所述第二基站与所述第一基站之间可以建立通信链路。Manner 3: Send, by using the UE related signaling, the first base station, whether an inquiry message of the communication link can be established between the first base station and the second base station, where the second base station identifier is carried, when receiving the When the receiving message is returned by the first base station, determining that a communication link can be established between the first base station and the second base station; or sending the second base station and the second base station by using UE related signaling Whether an inquiry message of a communication link can be established between the first base stations, where the first base station identifier is carried, and when receiving the accept message returned by the second base station, determining the second base station A communication link can be established with the first base station.
根据权利要求40所述的设备，其特征在于，所述处理器具体用于：The device according to claim 40, wherein the processor is specifically configured to:

在UE的直接通信请求消息触发下，发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径。A direct communication path between the first UE and the second UE via the first base station and the second base station is initiated, triggered by a direct communication request message of the UE.
根据权利要求40所述的设备，其特征在于，所述处理器具体用于：The device according to claim 40, wherein the processor is specifically configured to:

获取所述第一基站用于直接通信的IP地址和隧道端口号；Obtaining an IP address and a tunnel port number used by the first base station for direct communication;

向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的IP地址和隧道端口号；接收所述第二基站返回的路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号；Sending a path setup request message to the second base station, where the first base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the second base station, where the second The IP address and tunnel port number used by the base station for direct communication;

向所述第一基站发送路径建立请求消息，其中携带所述第二基站用于直接通信的IP地址和隧道端口号；接收所述第一基站返回的路径建立响应消息。And sending a path setup request message to the first base station, where the second base station carries an IP address and a tunnel port number for direct communication; and receives a path setup response message returned by the first base station.
根据权利要求43所述的设备，其特征在于，所述处理器向所述第一基站发送直接路径隧道信息请求消息，并接收所述第一基站返回的所述第一基站用于直接通信的IP地址和隧道端口号；或者，所述发起单元向所述第一基站发送询问消息，并从所述第一基站返回的接受消息中获得所述第一基站用于直接通信的IP地址和隧道端口号。The device according to claim 43, wherein the processor sends a direct path tunnel information request message to the first base station, and receives the first base station returned by the first base station for direct communication. An IP address and a tunnel port number; or the initiating unit sends an inquiry message to the first base station, and obtains an IP address and a tunnel used by the first base station for direct communication from an accept message returned by the first base station The port number.
根据权利要求40所述的设备，其特征在于，所述处理器具体用于：The device according to claim 40, wherein the processor is specifically configured to:

向所述第一基站发送路径建立触发命令，其中携带第二基站标识以及用于所述第二基站确定UE的标识信息；Sending a path establishment triggering command to the first base station, where the second base station identifier is used, and the second base station determines identifier information of the UE;

所述第一基站收到所述路径建立触发命令后，向所述第二基站发送路径建立请求消息，其中携带所述第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及所述用于所述第二基站确定UE的标识信息；After receiving the path establishment triggering command, the first base station sends a path establishment request message to the second base station, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication are carried. a base station control plane identifier, and the identifier information used by the second base station to determine the UE;

所述第二基站根据所述第一基站发送的路径建立请求消息中的UE的标识信息，获知要对所述第二UE建立直接通信路径，所述第二基站与所述第二UE进行无线资源控制RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；The second base station is configured to establish a direct communication path for the second UE according to the identifier information of the UE in the path setup request message sent by the first base station, and the second base station performs wireless with the second UE. a resource control RRC reconfiguration process, establishing a radio bearer for direct communication between the second base station and the second UE;

接收所述第一基站返回的路径建立触发响应消息。Receiving a path setup trigger response message returned by the first base station.
一种基站，其特征在于，包括：处理器、存储器、收发机；A base station, comprising: a processor, a memory, and a transceiver;

所述存储器，用于存储一个或多个可执行程序，被用于配置所述处理器；The memory is configured to store one or more executable programs, which are used to configure the processor;

所述收发机，用于在所述处理器的控制下接收和发送数据；The transceiver is configured to receive and send data under the control of the processor;

所述处理器，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于接收核心网设备发送的路径建立请求消息，其中携带第一用户设备UE驻留的第一基站用于直接通信的IP地址和隧道端口号；或者，携带第二UE驻留的第二基站用于直接通信的IP地址和隧道端口号；The processor is configured with one or more executable programs, and the one or more executable programs are configured to: receive a path establishment request message sent by a core network device, where the first user equipment is carried The first base station where the UE camps for the IP address and the tunnel port number for direct communication; or the IP address and the tunnel port number for the second base station where the second UE camps for direct communication;

用于与第二UE进行无线资源控制RRC重配过程，建立在所述设备与所述第二UE之间用于直接通信的无线承载；或者，与所述第一UE进行无线资源控制RRC重配过程，建立所述第一基站与所述第一UE之间用于直接通信的无线承载；And performing a radio resource control RRC reconfiguration procedure with the second UE, establishing a radio bearer for direct communication between the device and the second UE; or performing radio resource control RRC with the first UE a matching procedure, establishing a radio bearer for direct communication between the first base station and the first UE;

用于向所述核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；或者，包含第一基站用于直接通信的IP地址和端口号。And a method for returning a path establishment response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included; or, the IP address and port number used by the first base station for direct communication are included.
根据权利要求46所述的基站，其特征在于，所述处理器还用于： The base station according to claim 46, wherein the processor is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.
根据权利要求46所述的基站，其特征在于，所述处理器还用于：The base station according to claim 46, wherein the processor is further configured to:

接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the core network device, whether an inquiry message of a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And determining, when the communication link is established between the first base station and the second base station, according to the second base station identifier, returning an accept message to the core network device.
一种基站，其特征在于，包括：处理器、存储器、收发机；A base station, comprising: a processor, a memory, and a transceiver;

所述存储器，用于存储一个或多个可执行程序，被用于配置所述处理器；The memory is configured to store one or more executable programs, which are used to configure the processor;

所述收发机，用于在所述处理器的控制下接收和发送数据；The transceiver is configured to receive and send data under the control of the processor;

所述处理器，被配置了一个或多个可执行程序，所述一个或多个可执行程序用于执行以下方法：用于接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息；The processor is configured with one or more executable programs, and the one or more executable programs are configured to: receive a path establishment trigger command sent by a core network device, where the second user equipment is carried a second base station identifier that is reserved by the UE, and identifier information for determining, by the second base station, a path setup request message for carrying the IP address of the user plane used by the first base station for direct communication And a tunnel port number, a first base station control plane identifier, and identifier information used by the second base station to determine the UE; configured to perform radio resource control RRC reconfiguration with the first UE, and return to the core network device Path establishment trigger response message;

用于根据第一用户设备UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与所述第二UE进行无线资源控制RRC重配过程，建立第二基站与所述第二UE之间用于直接通信的无线承载；用于向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。And determining, according to the path setup request message sent by the first base station where the first user equipment UE is camped, to establish a direct communication path for the second UE, and performing a radio resource control RRC reconfiguration process with the second UE to establish a second a radio bearer for direct communication between the base station and the second UE, configured to return a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are included, And a second base station control plane identifier.
根据权利要求49所述的基站，其特征在于，所述处理器还用于：The base station according to claim 49, wherein the processor is further configured to:

在建立与所述核心网设备之间的非UE相关连接时，向所述核心网设备上报与自身有直接接口的基站的信息。When establishing a non-UE related connection with the core network device, the core network device reports information of a base station that has a direct interface with itself.
根据权利要求49所述的基站，其特征在于，所述处理器还用于：The base station according to claim 49, wherein the processor is further configured to:

接收所述核心网设备发送的所述第一基站与所述第二基站之间是否可以建立通信链路的询问消息，其中携带第二基站标识；Receiving, by the core network device, whether an inquiry message of a communication link can be established between the first base station and the second base station, where the second base station identifier is carried;

当根据所述第二基站标识确定所述第一基站与所述第二基站之间可以建立通信链路时，向所述核心网设备返回接受消息。And determining, when the communication link is established between the first base station and the second base station, according to the second base station identifier, returning an accept message to the core network device.
根据权利要求49所述的基站，其特征在于，所述处理器还用于：The base station according to claim 49, wherein the processor is further configured to:

根据所述第一UE驻留的所述第一基站发送的路径建立请求消息，获知要对所述第二UE建立直接通信路径，与所述第二UE进行RRC重配过程，建立所述第二基站与所述第二UE之间用于直接通信的无线承载；Determining, according to the path setup request message sent by the first base station, the first UE to establish a direct communication path, and performing an RRC reconfiguration process with the second UE to establish the first a radio bearer for direct communication between the second base station and the second UE;

向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。Returning a path setup response message to the first base station, where the second base station includes an IP address and a tunnel port number for direct communication, and a second base station control plane identifier.
一种路径建立***，其特征在于，该***包括：核心网设备和基站，其中，A path establishing system, the system comprising: a core network device and a base station, wherein

所述核心网设备用于：The core network device is used to:

确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径；Determining that the first base station where the first user equipment UE camps and the second base station where the second UE camps may establish a communication link; and initiating establishing between the first UE and the second UE via the Directly between a base station and the second base station Communication path

所述基站用于：The base station is used to:

接收核心网设备发送的路径建立请求消息，其中携带第一用户设备UE驻留的第一基站用于直接通信的IP地址和隧道端口号；或者，携带第二UE驻留的第二基站用于直接通信的IP地址和隧道端口号；Receiving a path setup request message sent by the core network device, where the first base station that the first user equipment UE camps on carries the IP address and the tunnel port number for direct communication; or the second base station that carries the second UE camps for Direct communication IP address and tunnel port number;

用于与第二UE进行无线资源控制RRC重配过程，建立在所述设备与所述第二UE之间用于直接通信的无线承载；或者，与所述第一UE进行无线资源控制RRC重配过程，建立所述第一基站与所述第一UE之间用于直接通信的无线承载；And performing a radio resource control RRC reconfiguration procedure with the second UE, establishing a radio bearer for direct communication between the device and the second UE; or performing radio resource control RRC with the first UE a matching procedure, establishing a radio bearer for direct communication between the first base station and the first UE;

用于向所述核心网设备返回路径建立响应消息，其中包含第二基站用于直接通信的IP地址和隧道端口号；或者，包含第一基站用于直接通信的IP地址和端口号。And a method for returning a path establishment response message to the core network device, where the IP address and the tunnel port number used by the second base station for direct communication are included; or, the IP address and port number used by the first base station for direct communication are included.
一种路径建立***，其特征在于，该***包括：核心网设备和基站，其中，A path establishing system, the system comprising: a core network device and a base station, wherein

所述核心网设备用于：The core network device is used to:

确定第一用户设备UE驻留的第一基站和第二UE驻留的第二基站可以建立通信链路；用于发起建立所述第一UE和所述第二UE之间的经由所述第一基站和所述第二基站的直接通信路径；Determining that the first base station where the first user equipment UE camps and the second base station where the second UE camps may establish a communication link; and initiating establishing between the first UE and the second UE via the a direct communication path between a base station and the second base station;

所述基站用于：The base station is used to:

接收核心网设备发送的路径建立触发命令，其中携带第二用户设备UE驻留的第二基站标识，以及用于第二基站确定UE的标识信息；用于向所述第二基站发送路径建立请求消息，其中携带第一基站用于直接通信的用户面的IP地址和隧道端口号、第一基站控制面标识，以及用于所述第二基站确定UE的标识信息；用于与所述第一UE进行无线资源控制RRC重配，并且向所述核心网设备返回路径建立触发响应消息；Receiving a path establishment triggering command sent by the core network device, where the second base station identifier that the second user equipment UE camps on, and the identifier information used by the second base station to determine the UE, is used to send a path establishment request to the second base station. a message, where the IP address and the tunnel port number of the user plane used by the first base station for direct communication, the first base station control plane identifier, and the identifier information used by the second base station to determine the UE are used; The UE performs radio resource control RRC reconfiguration, and returns a path establishment trigger response message to the core network device;

用于根据第一用户设备UE驻留的第一基站发送的路径建立请求消息，获知要对第二UE建立直接通信路径，与所述第二UE进行无线资源控制RRC重配过程，建立第二基站与所述第二UE之间用于直接通信的无线承载；用于向所述第一基站返回路径建立响应消息，其中包含所述第二基站用于直接通信的IP地址和隧道端口号，以及第二基站控制面标识。 And determining, according to the path setup request message sent by the first base station where the first user equipment UE is camped, to establish a direct communication path for the second UE, and performing a radio resource control RRC reconfiguration process with the second UE to establish a second a radio bearer for direct communication between the base station and the second UE, configured to return a path setup response message to the first base station, where the IP address and the tunnel port number used by the second base station for direct communication are included, And a second base station control plane identifier.