CN103220735A - User plane building method after RN moves - Google Patents

Abstract

Translated fromChinese

本发明公开了一种RN移动后的用户平面建立方法，在S1或X2的切换过程中或切换完成后，进行移动RN的目的DeNB与服务RN的网关间的隧道建立；在切换完成后的S1接口建立时，进行移动RN与目的DeNB间的隧道建立。应用本发明所述的用户平面建立方法，能够在RN移动到新的DeNB时，实现用户平面的建立，并使切换过程对UE透明，保证数据传输的连续性。

The invention discloses a method for establishing a user plane after an RN moves. During the handover process of S1 or X2 or after the handover is completed, the tunnel between the destination DeNB of the mobile RN and the gateway of the serving RN is established; after the handover is completed, the S1 When the interface is established, the tunnel between the mobile RN and the target DeNB is established. Applying the method for establishing the user plane of the present invention can realize the establishment of the user plane when the RN moves to a new DeNB, and make the handover process transparent to the UE, thereby ensuring the continuity of data transmission.

Description

Translated fromChinese

一种RN移动后的用户平面建立方法A method for establishing user plane after RN moves

技术领域technical field

本发明涉及移动通信系统领域，特别涉及一种RN移动后的用户平面建立方法。The invention relates to the field of mobile communication systems, in particular to a method for establishing a user plane after an RN moves.

背景技术Background technique

图1为现有支持中继(RN)的LTE结构示意图，如图1所示，在LTE系统的无线接入网络中，无线资源管理实体包括宏基站(eNB)101和中继102，RN通过另外一个宏基站(DeNB)103接入核心网络。其中，eNB 101之间通过X2接口相连，每个eNB 101分别通过S1接口与核心网中的移动管理实体(MME)和服务网管(S-GW)104相连；RN 102通过Un接口接入DeNB 103。DeNB 103提供了RN 102和其他eNB之间的X2代理(proxy)功能。DeNB 103提供了RN 102和MME/S-GW 104之间的S1代理(proxy)功能。S1和X2的代理功能包括在RN 102和eNB 101、RN 102和MME 104之间传输UE专用的X2和S1信令，以及在RN 102和S-GW 104之间传输。FIG. 1 is a schematic diagram of an existing LTE structure supporting a relay (RN). As shown in FIG. Another macro base station (DeNB) 103 accesses the core network. Among them, the eNBs 101 are connected through the X2 interface, and each eNB 101 is respectively connected to the mobile management entity (MME) and the serving network management (S-GW) 104 in the core network through the S1 interface; theRN 102 is connected to the DeNB 103 through the Un interface . DeNB 103 provides an X2 proxy (proxy) function betweenRN 102 and other eNBs. DeNB 103 provides an S1 proxy (proxy) function betweenRN 102 and MME/S-GW 104. The proxy functions of S1 and X2 include transmitting UE-specific X2 and S1 signaling betweenRN 102 and eNB 101,RN 102 and MME 104, and betweenRN 102 and S-GW 104.

图1是目前固定中继的结构图。S1，X2和Un接口终止于固定中继。DeNB提供了RN和DeNB之间，RN和其他节点，比如MME，其他的eNB，S1和X2的proxy功能。Proxy功能包含：在S1和X2接口上传输UE专用S1和X2消息，传输RN和DeNB、RN和其它网络节点之间的GTP数据包。由于proxy功能，在RN看来，DeNB就是MME、其他eNB和S-GW的功能的结合体。Fig. 1 is a structural diagram of a fixed relay at present. The S1, X2 and Un interfaces terminate at fixed trunks. DeNB provides the proxy function between RN and DeNB, RN and other nodes, such as MME, other eNBs, S1 and X2. Proxy functions include: transmitting UE-specific S1 and X2 messages on S1 and X2 interfaces, transmitting GTP data packets between RN and DeNB, RN and other network nodes. Due to the proxy function, in the view of the RN, the DeNB is a combination of functions of the MME, other eNBs and the S-GW.

RN连接到DeNB的过程分成了两个阶段。The process of RN connecting to DeNB is divided into two stages.

阶段一：RN的预配置阶段。Phase 1: RN pre-configuration phase.

RN作为一个UE，附着在E-UTRAN/EPC，附着过程和普通UE的附着过程一样，MME把RN当作普通UE为它选择S-GW和P-GW。服务RN的MME叫做RN-MME，从RN操作维护得到最初始的配置参数，配置参数至少包含RN可以连接的DeNB小区的列表。当过程结束，RN通过去附着过程离开网络，进入到阶段二。As a UE, RN attaches to E-UTRAN/EPC. The attachment process is the same as that of ordinary UE. MME regards RN as an ordinary UE and selects S-GW and P-GW for it. The MME that serves the RN is called RN-MME, and obtains the initial configuration parameters from the operation and maintenance of the RN. The configuration parameters at least include a list of DeNB cells that the RN can connect to. When the process ends, the RN leaves the network through the detachment process and enters phase two.

阶段二：RN的工作阶段。Phase 2: RN's working phase.

RN从预配置的DeNB的小区列表中选择一个DeNB开始进入正常工作状态。当DeNB发起了S1/X2承载建立后，RN发起和DeNB之间的S1/X2承载建立。DeNB可能会发起RN的RRC重配置过程去更新RN的参数。The RN selects a DeNB from the pre-configured cell list of the DeNB to enter the normal working state. After the DeNB initiates the establishment of the S1/X2 bearer, the RN initiates the establishment of the S1/X2 bearer between the DeNB and the DeNB. The DeNB may initiate the RRC reconfiguration process of the RN to update the parameters of the RN.

在S1建立之后，如果配置参数改变了，DeNB发起S1的eNB配置更新过程。X2接口建立后，DeNB发起X2 eNB配置更新过程去更新小区的配置信息。这个阶段，RN的小区标识ECGI是由RN OAM配置的。After S1 is established, if the configuration parameters are changed, DeNB initiates the eNB configuration update process of S1. After the X2 interface is established, the DeNB initiates the X2 eNB configuration update process to update the configuration information of the cell. At this stage, the cell identity ECGI of the RN is configured by the RN OAM.

在阶段二，DeNB提供了RN的S-GW/P-GW的功能，包含：为RN建立一个session和管理承载，提供S11的功能。在DeNB上面的P-GW的功能还包括为RN分配IP地址，用户RN和OAM通信。这个地址可能和DeNB的IP地址不同。In phase 2, the DeNB provides the functions of the RN's S-GW/P-GW, including: establishing a session and managing the bearer for the RN, and providing the function of S11. The function of the P-GW on the DeNB also includes assigning an IP address to the RN, and communicating with the user RN and the OAM. This address may be different from the IP address of the DeNB.

RN和DeNB要把信令和数据映射到为RN建立的EPS承载上。映射机制是基于目前定义的UE和P-GW之间的Qos机制。RN and DeNB need to map signaling and data to the EPS bearer established for RN. The mapping mechanism is based on the currently defined Qos mechanism between UE and P-GW.

图2显示了RN的附着过程。这个过程和普通的UE附着过程基本相同，区别在于：Figure 2 shows the RN attachment process. This process is basically the same as the normal UE attach process, the difference is:

1.DeNB在和MME建立S1接口的过程中，通过S1建立响应消息知道哪些MME支持RN功能；1. In the process of establishing the S1 interface with the MME, the DeNB knows which MMEs support the RN function through the S1 establishment response message;

2.在步骤1，RN和DeNB建立RRC连接的过程，RN发送RN指示给DeNB；2. Instep 1, the RN and the DeNB establish the RRC connection process, and the RN sends the RN indication to the DeNB;

3.在步骤4b，在建立S1接口UE上下文的过程中的初始UE消息中，DeNB要发送RN指示和S-GW/P-GW的IP地址给MME；3. In step 4b, in the initial UE message during the process of establishing the S1 interface UE context, the DeNB shall send the RN indication and the IP address of the S-GW/P-GW to the MME;

4.在附着过程中，EPC检查RN是否被认证了，只有当RN是认证的RN，EPC接受附着过程，并且建立和DeNB之间的上下文；否则，EPC拒绝附着过程。4. During the attach process, the EPC checks whether the RN is authenticated. Only when the RN is an authenticated RN, the EPC accepts the attach process and establishes a context with the DeNB; otherwise, the EPC rejects the attach process.

UE通过RN附着在网络，服务UE的MME被称为UE-MME，RN-MME和UE-MME可以是相同的MME，或者是不同的MME。RN的GW，包含SGW和PGW，目前都是和DeNB在同一个实体上。SGW和PGW实现不同的功能，为了描述简单，把它们统称为RN的GW，实际上，它包含两个不同的功能。The UE attaches to the network through the RN, and the MME serving the UE is called UE-MME. The RN-MME and the UE-MME may be the same MME or different MMEs. RN's GW, including SGW and PGW, is currently on the same entity as DeNB. The SGW and the PGW implement different functions. For simplicity of description, they are collectively referred to as the RN's GW. In fact, it includes two different functions.

目前定义的中继是用于固定位置的，不支持中继在不同小区之间的移动性。目前的机制不适用于高速移动的火车的场景。高速火车目前发展很快，移动速度很高，例如250-350公里每小时，高速移动的火车的无线环境比较特殊，例如高噪声，高的穿透损耗，严重的多普勒频率偏移等。现有的中继所提供的服务质量无法满足运营商的需求，移动中继就是要解决上述现有中继存在的问题，提高高速火车上所能提供服务的质量，更好的满足用户的需求。Currently defined relays are used for fixed locations and do not support the mobility of relays between different cells. The current mechanism is not suitable for the scenario of a train moving at high speed. High-speed trains are currently developing rapidly and moving at high speeds, such as 250-350 kilometers per hour. The wireless environment of high-speed trains is relatively special, such as high noise, high penetration loss, and severe Doppler frequency shift. The quality of service provided by the existing relays cannot meet the needs of operators. The mobile relay is to solve the above-mentioned problems existing in the existing relays, improve the quality of services that can be provided on high-speed trains, and better meet the needs of users .

移动中继和固定中继不同的地方是移动中继的DeNB在移动的过程中会改变，而在切换的时候，移动中继的承载、上下文和移动中继的用户都需要切换到目的DeNB之上，而且要保证数据的连续性。目前的协议没有讨论这方面如何支持。需要在目的DeNB与RN-GW间建立用于传输UE信息的用户平面，并实现移动RN与目的DeNB间S1接口的建立，建立移动RN与目的DeNB之间的用户平面，尽量保证RN的切换过程对UE透明。The difference between the mobile relay and the fixed relay is that the DeNB of the mobile relay will change during the process of moving, and at the time of handover, the bearer, context and user of the mobile relay need to be handed over to the destination DeNB. On, but also to ensure the continuity of the data. The current protocol does not discuss how this is supported. It is necessary to establish a user plane for transmitting UE information between the target DeNB and RN-GW, and realize the establishment of the S1 interface between the mobile RN and the target DeNB, establish a user plane between the mobile RN and the target DeNB, and ensure the handover process of the RN as much as possible Transparent to the UE.

本发明涉及了当RN移动的时候，RN如何从在DeNB之间进行切换，UE如何跟着RN一起切换到目的的DeNB，如何建立起来新的和DeNB之间的连接，如何保证数据的连续接收，并且减少切换过程的消息交互，切换过程尽量对UE和核心网透明。The present invention relates to how the RN switches between DeNBs when the RN moves, how the UE switches to the target DeNB together with the RN, how to establish a new connection with the DeNB, and how to ensure continuous data reception. In addition, message interaction in the handover process is reduced, and the handover process is as transparent as possible to the UE and the core network.

发明内容Contents of the invention

本发明提供了一种支持组切换和数据连续接收的方法，能够在高速移动的环境下，减少不必要的信令流程，减少网络拥塞。The invention provides a method for supporting group switching and continuous data reception, which can reduce unnecessary signaling procedures and network congestion in a high-speed mobile environment.

为实现上述目的，本发明采用如下的技术方案：To achieve the above object, the present invention adopts the following technical solutions:

一种移动中继的DeNB与移动中继的网关间的隧道建立方法，在所述移动中继(RN)通过S1接口切换到新的DeNB时，该方法包括：A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, when the mobile relay (RN) switches to a new DeNB through the S1 interface, the method includes:

A、所述移动RN的源DeNB向服务RN的移动管理实体(RN-MME)发送切换需要消息，该消息中包含所述移动RN服务的每个UE的标识和移动RN的网关(RN-GW)为该UE分配的上行隧道信息；A. The source DeNB of the mobile RN sends a handover requirement message to the mobility management entity (RN-MME) of the serving RN, which contains the identity of each UE served by the mobile RN and the gateway (RN-GW) of the mobile RN ) the uplink tunnel information allocated for the UE;

B、所述RN-MME向所述移动RN的目的DeNB发送切换请求消息，该消息中包含所述移动RN服务的每个UE的标识和RN-GW为相应UE分配的上行隧道信息；B. The RN-MME sends a handover request message to the target DeNB of the mobile RN, and the message includes the identity of each UE served by the mobile RN and the uplink tunnel information allocated by the RN-GW for the corresponding UE;

C、所述目的DeNB向所述RN-MME发送切换响应消息，该消息包含：目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息；C. The target DeNB sends a handover response message to the RN-MME, and the message includes: the new S1 interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN;

D、所述RN-MME或目的DeNB向所述RN-GW发送目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息。D. The RN-MME or the target DeNB sends to the RN-GW the new S1 interface identifier and downlink tunnel information allocated by the target DeNB for each UE served by the mobile RN.

较佳地，所述步骤D为：所述RN-MME向所述RN-GW发送改变承载建立请求，该消息中包含所述目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息；Preferably, the step D is: the RN-MME sends a change bearer establishment request to the RN-GW, and the message includes the new S1 interface allocated by the target DeNB for each UE served by the mobile RN. Identification and downlink tunnel information;

或者，or,

所述目的DeNB向所述RN-GW发送路径更新消息，该消息中包含所述目的DeNB为RN服务的每个UE分配的S1接口新标识和下行隧道信息。The target DeNB sends a path update message to the RN-GW, and the message includes the new S1 interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the RN.

较佳地，在所述步骤D后，该方法进一步包括包括步骤E：所述RN-MME向所述源DeNB发送UE上下文释放命令消息，该消息中包含所述移动RN服务的所有UE的标识，所述源DeNB接收所述UE上下文释放命令消息后，释放所述移动RN的上下文信息和所述移动RN服务的所有UE的上下文信息。Preferably, after the step D, the method further includes step E: the RN-MME sends a UE context release command message to the source DeNB, and the message contains the identifiers of all UEs served by the mobile RN After receiving the UE context release command message, the source DeNB releases the context information of the mobile RN and the context information of all UEs served by the mobile RN.

较佳地，在所述步骤E后，该方法进一步包括：在所述移动RN与目的DeNB间建立S1接口，并保持所述移动RN服务的所有UE的上下文信息不变。Preferably, after the step E, the method further includes: establishing an S1 interface between the mobile RN and the target DeNB, and keeping the context information of all UEs served by the mobile RN unchanged.

较佳地，在所述S1切换完成后，该方法进一步包括：Preferably, after the S1 handover is completed, the method further includes:

对于所述移动RN服务的每个UE，所述目的DeNB将相应UE的标识和目的DeNB为相应UE分配的S1接口新标识发送给服务于相应UE的(UE-MME)，用于更新该UE-MME上的UE信息；所述UE-MME为相应UE分配S1接口新标识，并通知所述目的DeNB；For each UE served by the mobile RN, the target DeNB sends the identity of the corresponding UE and the new identity of the S1 interface allocated by the target DeNB to the corresponding UE (UE-MME) to update the UE - UE information on the MME; the UE-MME allocates a new S1 interface identifier for the corresponding UE, and notifies the target DeNB;

所述UE-MME或目的DeNB向所述RN-GW发送UE-MME为移动RN服务的每个UE分配的S1接口新标识。The UE-MME or the target DeNB sends to the RN-GW the new identity of the S1 interface allocated by the UE-MME for each UE served by the mobile RN.

较佳地，步骤A的所述切换需要消息中还包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB和RN-MME间的S1接口旧标识；Preferably, the handover requirement message in step A also includes the information that the mobile RN is a UE, including the old identity of the S1 interface between the source DeNB and the RN-MME of the mobile RN;

步骤B的所述切换请求消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message in step B also includes the new S1 interface identifier allocated by the RN-MME for the mobile RN and the uplink tunnel information allocated by the RN-GW for the mobile RN;

步骤C中的所述切换响应消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识、目的DeNB为所述移动RN分配的S1接口新标识和下行隧道信息；The handover response message in step C also includes the new identifier of the S1 interface assigned by the RN-MME to the mobile RN, the new identifier of the S1 interface assigned by the target DeNB to the mobile RN, and downlink tunnel information;

在步骤C后、步骤D前进一步包括：所述RN-MME向所述源DeNB发送切换命令信息，该消息中包含移动RN分配的S1接口新标识、目的DeNB为所述移动RN分配的S1接口新标识；After step C and before step D, it further includes: the RN-MME sends handover command information to the source DeNB, and the message includes the new identifier of the S1 interface allocated by the mobile RN, and the S1 interface allocated by the target DeNB to the mobile RN new logo;

步骤D中进一步包括：所述RN-MME向所述RN-GW发送目的DeNB为所述移动RN分配的下行隧道信息。Step D further includes: the RN-MME sending the downlink tunnel information allocated by the target DeNB to the mobile RN to the RN-GW.

一种移动中继的DeNB与移动中继网关间的隧道建立方法，在所述移动中继(RN)通过X2接口切换到新的DeNB时，该方法包括：A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, when the mobile relay (RN) switches to a new DeNB through an X2 interface, the method includes:

A、所述移动RN的源DeNB向目的DeNB发送切换请求消息，该消息中包含所述移动RN服务的每个UE的标识和移动RN的网关(RN-GW)为该UE分配的上行隧道信息；A. The source DeNB of the mobile RN sends a handover request message to the target DeNB, and the message contains the identity of each UE served by the mobile RN and the uplink tunnel information allocated by the gateway (RN-GW) of the mobile RN for the UE ;

B、目的DeNB向源DeNB发送切换响应消息，该消息中包含目的DeNB为移动RN服务的每个UE分配的新标识和下行隧道信息；B. The target DeNB sends a handover response message to the source DeNB, which contains the new identity and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN;

C、所述目的DeNB通过服务RN的移动管理实体(RN-MME)向RN-GW转发目的DeNB为移动RN服务的每个UE分配的SI接口新标识和下行隧道信息。C. The target DeNB forwards the new SI interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN to the RN-GW through the mobility management entity (RN-MME) of the serving RN.

较佳地，在所述步骤C后，该方法进一步包括包括步骤D：所述RN-MME向所述源DeNB发送UE上下文释放命令消息，该消息中包含所述移动RN服务的所有UE的标识，所述源DeNB接收所述UE上下文释放命令消息后，释放所述移动RN的上下文信息和所述移动RN服务的所有UE的上下文信息。Preferably, after the step C, the method further includes step D: the RN-MME sends a UE context release command message to the source DeNB, and the message contains the identifiers of all UEs served by the mobile RN After receiving the UE context release command message, the source DeNB releases the context information of the mobile RN and the context information of all UEs served by the mobile RN.

较佳地，在所述步骤D后，该方法进一步包括：在所述移动RN与目的DeNB间建立S1接口，并保持所述移动RN服务的所有UE的上下文信息不变。Preferably, after the step D, the method further includes: establishing an S1 interface between the mobile RN and the target DeNB, and keeping the context information of all UEs served by the mobile RN unchanged.

较佳地，在所述X2切换完成后，该方法进一步包括：Preferably, after the X2 switching is completed, the method further includes:

对于所述移动RN服务的每个UE，所述目的DeNB将相应UE的标识和目的DeNB为相应UE分配的S1接口新标识发送给服务于该UE的(UE-MME)，用于更新所述UE-MME中保存的相应UE的信息；For each UE served by the mobile RN, the target DeNB sends the identity of the corresponding UE and the new identity of the S1 interface allocated by the target DeNB to the (UE-MME) serving the UE to update the The information of the corresponding UE stored in the UE-MME;

所述UE-MME向RN-GW发送相应UE的标识、目的DeNB为相应UE分配的S1接口新标识、UE-MME为相应UE分配的S1接口新标识，用于更新所述RN-GW中保存的相应UE的信息；The UE-MME sends to the RN-GW the identity of the corresponding UE, the new identity of the S1 interface allocated by the target DeNB for the corresponding UE, and the new identity of the S1 interface allocated by the UE-MME for the corresponding UE, for updating the information about the corresponding UE;

所述UE-MME向目的DeNB发送UE-MME为相应UE分配的S1接口新标识。The UE-MME sends the new identity of the S1 interface assigned by the UE-MME to the corresponding UE to the target DeNB.

较佳地，步骤A的切换请求消息中还包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB上的旧标识和RN-GW为所述移动RN分配的上行隧道信息；Preferably, the handover request message in step A also includes information that the mobile RN is a UE, including the old identity of the mobile RN on the source DeNB and the uplink tunnel information allocated by the RN-GW for the mobile RN;

步骤B的切换响应消息中还包含所述移动RN在源DeNB上的旧标识、所述移动RN在目的DeNB上的新标识和目的DeNB为移动RN分配的下行隧道信息；The handover response message in step B also includes the old identity of the mobile RN on the source DeNB, the new identity of the mobile RN on the target DeNB, and the downlink tunnel information allocated by the target DeNB to the mobile RN;

步骤C中所述目的DeNB通过RN-MME向RN-GW转发UE信息时，一并通过RN-MME向RN-GW转发目的DeNB为所述移动RN分配的下行隧道信息，并向RN-MME发送所述移动RN在目的DeNB上的新标识。When the target DeNB in step C forwards the UE information to the RN-GW through the RN-MME, the downlink tunnel information allocated by the target DeNB for the mobile RN is also forwarded to the RN-GW through the RN-MME, and sent to the RN-MME The new identity of the mobile RN on the target DeNB.

一种移动中继的DeNB与移动中继间的隧道建立方法，在所述移动中继(RN)切换到新的DeNB后，该方法包括：A method for establishing a tunnel between a mobile relay DeNB and a mobile relay, after the mobile relay (RN) is handed over to a new DeNB, the method includes:

A、所述移动RN向所述DeNB发送S1建立请求消息，该消息中包含切换时DeNB为所述每个UE分配的S1接口新标识、所述每个UE的当前上下文信息；A. The mobile RN sends an S1 establishment request message to the DeNB, and the message includes the new S1 interface identifier assigned by the DeNB to each UE during handover, and the current context information of each UE;

B、所述DeNB向所述移动RN发送S1建立响应消息，该消息中包含所述DeNB为所述每个UE分配的S1接口新标识和上行隧道信息。B. The DeNB sends an S1 establishment response message to the mobile RN, and the message includes the new S1 interface identifier and uplink tunnel information allocated by the DeNB to each UE.

较佳地，步骤A的所述S1建立请求消息中还包含所述移动RN的基站标识和支持的TAI文信息；Preferably, the S1 setup request message in step A also includes the mobile RN's base station identifier and supported TAI text information;

步骤B的所述S1建立响应消息中包含目的DeNB为所述每个UE分配的S1接口新标识和上行隧道信息。The S1 establishment response message in step B includes the new S1 interface identifier and uplink tunnel information allocated by the target DeNB for each UE.

一种移动中继的DeNB与移动中继网关间的隧道建立方法，在所述移动中继(RN)切换到新的DeNB后，该方法包括：A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, after the mobile relay (RN) is handed over to a new DeNB, the method includes:

A、所述DeNB通过UE的MME(UE-MME)向所述移动RN的网关(RN-GW)发送切换时所述DeNB为所述UE分配的S1接口新标识和下行隧道信息；所述UE为所述移动RN服务的每个UE；A. The DeNB sends the new S1 interface identifier and downlink tunnel information assigned by the DeNB to the UE during the handover to the mobile RN gateway (RN-GW) through the UE's MME (UE-MME); the UE each UE served by the mobile RN;

B、所述RN-GW通过所述UE-MME向所述DeNB发送RN-GW为UE分配的上行隧道信息。B. The RN-GW sends the uplink tunnel information allocated by the RN-GW to the UE to the DeNB through the UE-MME.

较佳地，所述步骤A为：所述DeNB向所述UE-MME发送路径切换请求消息，所述UE-MME向所述RN-GW发送改变承载请求消息，所述路径切换请求消息和改变承载请求消息中包含所述DeNB为相应UE分配的S1接口新标识和下行隧道信息；Preferably, the step A is: the DeNB sends a path switch request message to the UE-MME, the UE-MME sends a bearer change request message to the RN-GW, the path switch request message and the change The bearer request message includes the new S1 interface identifier and downlink tunnel information allocated by the DeNB to the corresponding UE;

所述步骤B为：所述RN-GW向所述UE-MME发送改变承载响应消息，所述UE-MME向所述DeNB发送路径切换请求确认消息，在所述改变承载响应消息和路径切换请求确认消息中包含RN-GW为相应UE分配的上行隧道信息。The step B is: the RN-GW sends a change bearer response message to the UE-MME, the UE-MME sends a path switch request confirmation message to the DeNB, and the change bearer response message and the path switch request The confirmation message includes the uplink tunnel information allocated by the RN-GW for the corresponding UE.

较佳地，在步骤A的所述改变承载请求消息中还包含所述UE-MME为相应UE分配的S1接口新标识；Preferably, the change bearer request message in step A also includes the new S1 interface identifier assigned by the UE-MME to the corresponding UE;

在步骤B的所述路径切换请求确认消息中还包含所述UE-MME为相应UE分配的S1接口新标识。The path switching request acknowledgment message in step B also includes the new S1 interface identifier assigned by the UE-MME to the corresponding UE.

较佳地，当所述移动RN通过S1切换到所述DeNB上时，在所述S1切换完成前，该方法进一步包括：Preferably, when the mobile RN is handed over to the DeNB through S1, before the S1 handover is completed, the method further includes:

在切换的源DeNB发给服务所述移动RN的移动管理实体(RN-MME)的切换需要消息中包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB和RN-MME间的S1接口旧标识；The handover requirement message sent by the handover source DeNB to the mobility management entity (RN-MME) serving the mobile RN contains the information that the mobile RN is a UE, which includes the information that the mobile RN is between the source DeNB and the RN-MME The old identifier of the S1 interface;

在所述RN-MME发送给所述DeNB的切换请求消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message sent by the RN-MME to the DeNB also includes the new S1 interface identifier allocated by the RN-MME for the mobile RN and the uplink tunnel information allocated by the RN-GW for the mobile RN;

在所述DeNB发送给所述RN-MME的切换响应消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识、所述DeNB为所述移动RN分配的S1接口新标识和下行隧道信息；The handover response message sent by the DeNB to the RN-MME also includes the new S1 interface identifier assigned by the RN-MME to the mobile RN, the new S1 interface identifier assigned by the DeNB to the mobile RN, and downlink tunnel information;

在所述RN-MME发送给所述源DeNB的切换命令消息中包含移动RN分配的S1接口新标识、所述DeNB为所述移动RN分配的S1接口新标识；The handover command message sent by the RN-MME to the source DeNB includes the new identifier of the S1 interface assigned by the mobile RN, and the new identifier of the S1 interface assigned by the DeNB to the mobile RN;

在所述RN-MME发送给所述RN-GW的改变承载请求消息中包含所述DeNB为所述移动RN分配的下行隧道信息。The change bearer request message sent by the RN-MME to the RN-GW includes the downlink tunnel information allocated by the DeNB for the mobile RN.

较佳地，当所述移动RN通过X2切换到所述DeNB上时，在所述X2切换完成前，该方法进一步包括：Preferably, when the mobile RN is handed over to the DeNB through X2, before the X2 handover is completed, the method further includes:

在切换的源DeNB发送给所述DeNB的切换请求消息中包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB上的旧标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message sent by the handover source DeNB to the DeNB contains the information of the mobile RN as a UE, including the old identity of the mobile RN on the source DeNB and the uplink allocated by the RN-GW for the mobile RN tunnel information;

在所述DeNB发送给所述源DeNB的切换响应消息中包含所述移动RN在源DeNB上的旧标识、所述移动RN在所述DeNB上的新标识和所述DeNB接受的为移动RN分配的上行隧道信息；The handover response message sent by the DeNB to the source DeNB includes the old identity of the mobile RN on the source DeNB, the new identity of the mobile RN on the DeNB, and the mobile RN assigned by the DeNB uplink tunnel information;

在所述DeNB发送给RN-MME的路径切换消息和所述RN-MME发送给所述RN-GW的改变承载请求消息中，包含所述DeNB为所述移动RN分配的下行隧道信息，并在所述路径切换消息中包含所述移动RN在所述DeNB上的新标识。In the path switching message sent by the DeNB to the RN-MME and the bearer change request message sent by the RN-MME to the RN-GW, the downlink tunnel information allocated by the DeNB to the mobile RN is included, and in The path switching message includes the new identity of the mobile RN on the DeNB.

由上述技术方案可见，本发明中，在S1或X2的切换过程中或切换完成后，进行移动RN的目的DeNB与服务RN的网关间的隧道建立；在切换完成后的S1接口建立时，进行移动RN与目的DeNB间的隧道建立。应用本发明所述的用户平面建立方法，能够在RN移动到新的DeNB时，实现用户平面的建立，并使切换过程对UE透明，保证数据传输的连续性。It can be seen from the above technical solution that in the present invention, during the handover process of S1 or X2 or after the handover is completed, the tunnel between the destination DeNB of the mobile RN and the gateway of the serving RN is established; when the S1 interface after the handover is established, the tunnel is established. The tunnel between the mobile RN and the target DeNB is established. Applying the method for establishing the user plane of the present invention can realize the establishment of the user plane when the RN moves to a new DeNB, and make the handover process transparent to the UE, thereby ensuring the continuity of data transmission.

附图说明Description of drawings

图1为现有支持中继(RN)的LTE结构示意图；FIG. 1 is a schematic diagram of an existing LTE structure supporting a relay (RN);

图2为现有RN的附着简化流程；Figure 2 is a simplified process for attaching an existing RN;

图3为本发明的工作原理图一；Fig. 3 is working principle figure one of the present invention;

图4为本发明的工作原理图二；Fig. 4 is working principle diagram two of the present invention;

图5为本发明的工作原理图三；Fig. 5 is working principle figure three of the present invention;

图6为本发明的工作原理图四；Fig. 6 is working principle figure four of the present invention;

图7为RN通过S1切换到目的DeNB的实施例一的工作流程图；FIG. 7 is a working flowchart ofEmbodiment 1 in which the RN switches to the target DeNB through S1;

图8为RN通过S1切换到目的DeNB的实施例二的工作流程图；FIG. 8 is a working flowchart of Embodiment 2 in which the RN switches to the target DeNB through S1;

图9为RN通过X2切换到目的DeNB的实施例三的工作流程图；FIG. 9 is a workflow flowchart ofEmbodiment 3 in which the RN switches to the target DeNB through X2;

图10为RN通过X2切换到目的DeNB的实施例四的工作流程图。Fig. 10 is a working flowchart of Embodiment 4 in which the RN switches to the target DeNB through X2.

具体实施方式Detailed ways

为使本发明的目的、技术手段和优点更加清楚明白，以下结合附图对本发明做进一步详细说明。In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

本发明提供了移动RN切换到目的DeNB之后的用户平面建立方法，包括RN的用户平面和RN服务的UE的用户平面，其中，可以在S1切换过程中或X2切换过程中实现用户平面的建立，也可以在移动RN已完成切换后实现用户平面的建立。The present invention provides a method for establishing a user plane after a mobile RN is handed over to a target DeNB, including the user plane of the RN and the user plane of the UE served by the RN, wherein the establishment of the user plane can be realized during the S1 handover process or the X2 handover process, The establishment of the user plane can also be realized after the mobile RN has completed the handover.

同时，本发明还提供了移动RN的DeNB与移动RN间用于传输UE数据的隧道建立方法，该过程可以在S1接口建立时一并完成。接下来，对本发明提供的方法进行详细介绍。At the same time, the present invention also provides a tunnel establishment method for transmitting UE data between the DeNB of the mobile RN and the mobile RN, and this process can be completed when the S1 interface is established. Next, the method provided by the present invention is introduced in detail.

用户平面包含三段隧道，分别是UE-GW到RN-GW之间，RN-GW和DeNB之间，DeNB和RN之间。其中，UE-GW和RN-GW之间的隧道在切换的过程中没有改变，从而保证RN的切换过程对UE透明。图3描述了在S1切换过程中实现DeNB与RN-GW间隧道建立的方法流程。该方法流程描述了在RN切换到目的DeNB的时候，发起S1切换过程，在切换需要消息携带UE的S1接口的标识信息、承载信息等，来建立和RN的SGW/PGW(以下称为RN-GW)之间的隧道，用来传输UE的数据。如图3所示，该流程包括：The user plane includes three tunnels, namely between UE-GW and RN-GW, between RN-GW and DeNB, and between DeNB and RN. Wherein, the tunnel between the UE-GW and the RN-GW remains unchanged during the handover process, thereby ensuring that the RN handover process is transparent to the UE. Fig. 3 describes the flow of the method for realizing the establishment of the tunnel between the DeNB and the RN-GW during the S1 handover process. The method flow describes that when the RN is handed over to the target DeNB, the S1 handover process is initiated, and the handover needs to carry the identification information of the UE's S1 interface, bearer information, etc., to establish the SGW/PGW with the RN (hereinafter referred to as RN- The tunnel between GW) is used to transmit the data of UE. As shown in Figure 3, the process includes:

步骤301：源DeNB发送切换需要消息给MME，所述消息包含RN的信息和RN服务的每个UE的信息，具体来说，UE的信息包含UE的标识和RNGW分配的上行隧道信息；Step 301: The source DeNB sends a handover need message to the MME, the message includes the information of the RN and the information of each UE served by the RN, specifically, the information of the UE includes the identity of the UE and the uplink tunnel information allocated by the RNGW;

步骤302：MME发送切换请求消息给目的DeNB，所述消息包含RN的信息和RN服务的UE的信息，具体来说，UE的信息包含UE的标识，和RNGW分配的上行隧道信息；Step 302: The MME sends a handover request message to the target DeNB, the message includes RN information and UE information served by the RN, specifically, the UE information includes the UE identifier and the uplink tunnel information allocated by the RNGW;

步骤303：目的DeNB发送切换响应消息给MME，消息包含RN的信息和UE的信息，具体来说，UE的信息包含UE在S1接口的标识，和T-DeNB分配的下行隧道信息；Step 303: The target DeNB sends a handover response message to the MME, the message includes RN information and UE information, specifically, the UE information includes the identifier of the UE on the S1 interface, and the downlink tunnel information allocated by the T-DeNB;

步骤304：MME或目的DeNB向RN-GW发送RN的信息和UE的信息，具体来说，UE的信息包含目的DeNB为UE分配的S1接口新标识和下行隧道信息。Step 304: The MME or the target DeNB sends the RN information and the UE information to the RN-GW. Specifically, the UE information includes the new S1 interface identifier and downlink tunnel information allocated to the UE by the target DeNB.

值得说明的是，也可以在S1切换后建立起来DeNB和RN-GW之间的隧道，此时，在S1切换的过程中，只把UE的标识信息，UE的上下文信息传递到T-DeNB。It is worth noting that the tunnel between the DeNB and the RN-GW can also be established after the S1 handover. At this time, only the identification information of the UE and the context information of the UE are transmitted to the T-DeNB during the S1 handover process.

图4为本发明在X2切换过程中实现DeNB与RN-GW间隧道建立的方法流程。该方法流程描述了在RN切换到目的DeNB的时候，发起X2的切换过程，在切换请求消息携带UE的S1接口的标识信息，承载信息等，来建立起来和RN的SGW/PGW之间的隧道，用来传输UE的数据。如图4所示，该流程包括：Fig. 4 is a flowchart of the method for realizing the establishment of the tunnel between the DeNB and the RN-GW during the X2 handover process of the present invention. The method flow describes that when the RN is handed over to the target DeNB, the X2 handover process is initiated, and the handover request message carries the identification information of the S1 interface of the UE, bearer information, etc., to establish a tunnel with the SGW/PGW of the RN , used to transmit UE data. As shown in Figure 4, the process includes:

步骤401：源DeNB发送切换请求消息给目的DeNB，所述消息包含RN的信息和RN服务的UE的信息，具体来说，UE的信息包含UE的标识，和RN GW分配的上行隧道信息；Step 401: The source DeNB sends a handover request message to the target DeNB, the message includes RN information and UE information served by the RN, specifically, the UE information includes the UE identifier and the uplink tunnel information allocated by the RN GW;

步骤402：目的DeNB发送切换响应消息给源DeNB，所述消息中包含RN的信息和RN服务的UE的信息，具体来说，UE的信息包含目的DeNB为移动RN服务的每个UE分配的新标识和下行隧道信息；Step 402: The target DeNB sends a handover response message to the source DeNB, the message contains the information of the RN and the information of the UE served by the RN, specifically, the information of the UE includes the new UE allocated by the target DeNB for each UE served by the mobile RN. Identification and downlink tunnel information;

步骤403：目的DeNB发送消息给MME，MME发送消息给RN-GW，消息包含UE的信息，具体来说，UE的信息包含UE在S1接口的新标识，目的DeNB分配的下行隧道信息；Step 403: The target DeNB sends a message to the MME, and the MME sends a message to the RN-GW. The message contains UE information. Specifically, the UE information includes the new identity of the UE on the S1 interface and the downlink tunnel information allocated by the target DeNB;

步骤404：RN-GW发送消息给MME，MME发送消息给目的DeNB，消息包含UE的信息，具体来说，UE的信息包含UE在S1接口的新标识，目的RN-GW分配的上行隧道信息。Step 404: RN-GW sends a message to MME, MME sends a message to the target DeNB, the message contains UE information, specifically, the UE information includes the new identity of the UE on the S1 interface, and the uplink tunnel information allocated by the target RN-GW.

值得说明的是，也可以在切换后建立起来DeNB和RN-GW之间的隧道，此时，在X2切换的过程中，只把UE的标识信息，UE的上下文信息传递到T-DeNB，也可以切换过程中不传递UE的上下文信息，UE的上下文信息也可以在图6所示的流程中传递到T-DeNB。如果在RN切换过程中把UE的上下文传递到了T-DeNB，在图6所示的过程中就不需要RN把UE的上下文信息传递到T-DeNB。It is worth noting that the tunnel between the DeNB and RN-GW can also be established after the handover. At this time, only the identification information of the UE and the context information of the UE are transmitted to the T-DeNB during the X2 handover process. The context information of the UE may not be transmitted during the handover process, and the context information of the UE may also be transmitted to the T-DeNB in the process shown in FIG. 6 . If the context information of the UE is transferred to the T-DeNB during the RN handover process, the RN does not need to transfer the context information of the UE to the T-DeNB in the process shown in FIG. 6 .

图5为本发明在S1切换或X2切换完成后实现DeNB与RN-GW间隧道建立的方法流程。该流程描述了在RN切换到目的DeNB的时候，发起S1或者X2的切换过程，切换完成后，建立起来T-DeNB和RN的SGW/PGW之间的隧道，用来传输UE的数据。如图5所示，该流程包括：Fig. 5 is a flowchart of the method for establishing a tunnel between the DeNB and the RN-GW after the S1 handover or the X2 handover is completed in the present invention. This process describes that when the RN is handed over to the target DeNB, the S1 or X2 handover process is initiated. After the handover is completed, a tunnel between the T-DeNB and the SGW/PGW of the RN is established to transmit UE data. As shown in Figure 5, the process includes:

步骤501：DeNB发送消息给UE-MME，UE-MME发送消息给RN-GW，在消息中包含DeNB为UE分配的S1接口新标识，以及DeNB为UE分配的下行隧道信息；其中的UE是指移动RN所服务的UE；Step 501: The DeNB sends a message to the UE-MME, and the UE-MME sends a message to the RN-GW, which contains the new S1 interface identifier allocated by the DeNB for the UE, and the downlink tunnel information allocated by the DeNB for the UE; where the UE refers to UE served by the mobile RN;

步骤502：RN-GW发送消息给UE-MME，UE-MME发送消息给DeNB，在消息中包含RN-GW为UE分配的上行隧道信息。建立起来RN-GW和DeNB之间的隧道。Step 502: RN-GW sends a message to UE-MME, UE-MME sends a message to DeNB, and the message includes the uplink tunnel information allocated by RN-GW for UE. A tunnel between the RN-GW and the DeNB is established.

通过上述图3、图4和图5的处理，目的DeNB为移动RN下的UE分配了新的S1接口标识和下行隧道信息，并通知给RN-GW，同时，目的DeNB也通过源DeNB和RN-MME获取了RN-GW之前为UE分配的上行隧道信息，这样，就能够在目的DeNB与RN-GW之间建立起用于传输UE数据的隧道。Through the processing in Figure 3, Figure 4 and Figure 5 above, the target DeNB assigns a new S1 interface identifier and downlink tunnel information to the UE under the mobile RN, and notifies the RN-GW. At the same time, the target DeNB also passes the source DeNB and RN - The MME obtains the uplink tunnel information previously allocated by the RN-GW to the UE, so that a tunnel for transmitting UE data can be established between the target DeNB and the RN-GW.

图6为本发明在S1切换或X2切换完成后DeNB与RN间S1接口的建立方法流程。该流程描述了在RN切换到目的DeNB的时候，发起S1或者X2的切换过程，切换完成后，建立起来DeNB与RN间S1接口，并同时传输DeNB与移动RN间的隧道信息。如图6所示，该流程包括：FIG. 6 is a flowchart of the method for establishing the S1 interface between the DeNB and the RN after the S1 handover or the X2 handover is completed in the present invention. This process describes that when the RN is handed over to the target DeNB, the S1 or X2 handover process is initiated. After the handover is completed, the S1 interface between the DeNB and the RN is established, and the tunnel information between the DeNB and the mobile RN is transmitted at the same time. As shown in Figure 6, the process includes:

步骤601：RN发送S1建立请求消息给目的DeNB，消息包含移动RN服务的每个UE的信息，具体来说，该UE信息包含切换时DeNB为UE的S1接口新标识和当前上下文信息；Step 601: The RN sends an S1 establishment request message to the target DeNB, the message contains information about each UE served by the mobile RN, specifically, the UE information includes the new identity of the S1 interface and the current context information of the DeNB as the UE during the handover;

步骤602：DeNB发送S1建立响应消息给RN，消息包含移动RN服务的每个UE的信息；具体来说，UE的信息包含UE在S1接口的标识，承载信息等UE的上下文信息。Step 602: The DeNB sends an S1 establishment response message to the RN, and the message includes the information of each UE served by the mobile RN; specifically, the UE information includes the UE's identity on the S1 interface, bearer information, and other UE context information.

通过图6所示的流程，能够在建立S1接口的同时，传输RN与DeNB间的隧道信息，用于在RN与DeNB间传输UE数据。Through the process shown in FIG. 6 , the tunnel information between the RN and the DeNB can be transmitted while the S1 interface is established, so as to transmit UE data between the RN and the DeNB.

实施例一Embodiment one

实施例一是RN通过S1接口切换到目的DeNB的流程图。RN的S/P GW没有改变。在RN切换的过程中，要为UE建立起来RN的S/PGW和T-DeNB之间的用于传输数据的隧道。RN切换到目的DeNB，RN服务的MME也可以切换到新的MME上面。实施例一以RN的服务MME(RN-MME)没有改变为例子。如果RN的服务MME改变了，还涉及源MME和目的MME之间的消息的传递。图7省略了源MME和目的MME之间的消息。下面是对图7的具体说明：Embodiment 1 is a flow chart of the RN handing over to the target DeNB through the S1 interface. RN's S/PGW has not changed. In the process of RN handover, a tunnel for transmitting data between the S/PGW of the RN and the T-DeNB shall be established for the UE. The RN is handed over to the target DeNB, and the MME served by the RN can also be handed over to the new MME. In the first embodiment, the serving MME (RN-MME) of the RN is not changed as an example. If the serving MME of the RN changes, it also involves the transfer of messages between the source MME and the destination MME. Figure 7 omits the messages between the source MME and the destination MME. The following is a specific description of Figure 7:

步骤701：RN对周围的无线环境进行测量，并且把测量报告发送给服务的DeNB(图中的S-DeNB)。根据测量汇报，S-DeNB决定把RN切换到信号质量更好的目的DeNB(图中的T-DeNB)。Step 701: RN measures the surrounding wireless environment, and sends the measurement report to the serving DeNB (S-DeNB in the figure). According to the measurement report, the S-DeNB decides to switch the RN to the target DeNB with better signal quality (T-DeNB in the figure).

步骤702：S-DeNB发送切换需要消息给RN的服务MME，即图中的RN-MME，所述切换需要消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 702: The S-DeNB sends a handover need message to the serving MME of the RN, ie, the RN-MME in the figure, and the handover need message includes the existing information regarding the RN as a UE. The existing information of the RN as UE includes:

-RN在S-DeNB和RN-MME之间的旧的S1接口的标识：eNB UE S1 APID，MME UE S1 AP ID；-Identification of RN's old S1 interface between S-DeNB and RN-MME: eNB UE S1 APID, MME UE S1 AP ID;

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

-切换的目的地址，此处切换的目的T-DeNB的标识，由此标识MME可以找到T-DeNB。-Handover destination address, here is the identifier of the destination T-DeNB for the handover, thereby identifying that the MME can find the T-DeNB.

-源到目的的透明传输的容器，- container for transparent transfer from source to destination,

所述切换需要消息还包含RN服务的UE的信息。包含该信息是为了在RN的网关(SGW和PGW)和T-DeNB之间为UE建立传输数据的隧道。所述UE的信息包含UE的标识和隧道信息(UE的信息可以包含下述一个或者多个或者所有)：The handover requirement message also includes the information of the UE served by the RN. The purpose of including this information is to establish a data transmission tunnel for the UE between the gateways (SGW and PGW) of the RN and the T-DeNB. The UE information includes UE identity and tunnel information (UE information may include one or more or all of the following):

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：eNB UE S1 APID，MME UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: eNB UE S1 APID, MME UE S1 AP ID;

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE的E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- E-RAB information of UE, such as E-RAB identifier, uplink TEID and transport layer address assigned by RN-GW, Qos information.

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface; RRC context, handover restriction list, location report information.

其中，UE的标识为RN切换前UE的旧标识，可以是上述几种标识中的一种或任意组合，用于识别相应UE。一般地，在后续发送的消息中出现的UE旧标识与本步骤的UE标识相同。另外，UE的S1接口标识分为DeNB分配的S1接口标识eNB UE S1 AP ID和MME分配的S1接口标识MME UES1 AP ID，包括RN作为UE时的S1接口标识也分为上述两种，在进行切换时，目的DeNB为RN和UE分配S1接口新标识为new eNB UE S1 AP ID，RN-MME为RN分配S1接口新标识new MME UE S1 AP ID，服务于UE的MME(UE-MME)为UE分配S1接口新标识new MME UE S1 AP ID。Wherein, the UE ID is the old ID of the UE before the RN handover, which may be one or any combination of the above-mentioned IDs, and is used to identify the corresponding UE. Generally, the old UE identity appearing in the message sent subsequently is the same as the UE identity in this step. In addition, the S1 interface identifier of the UE is divided into the S1 interface identifier eNB UE S1 AP ID assigned by the DeNB and the S1 interface identifier MME UES1 AP ID assigned by the MME, including the S1 interface identifier when the RN acts as a UE. During handover, the target DeNB assigns the new S1 interface identifier to RN and UE as new eNB UE S1 AP ID, RN-MME assigns new S1 interface identifier to RN as new MME UE S1 AP ID, and the MME serving UE (UE-MME) is The UE allocates a new identifier for the S1 interface new MME UE S1 AP ID.

步骤703：RN-MME发送切换请求给T-DeNB，消息包含把RN当成UE的现有信息。如果RN-MME改变了，旧的MME需要转发消息给目的MME，在此省略了两个MME转发消息的过程。所述RN当成UE的现有信息包含：Step 703: RN-MME sends a handover request to T-DeNB, and the message includes the existing information regarding RN as UE. If the RN-MME changes, the old MME needs to forward the message to the destination MME, and the process of two MMEs forwarding the message is omitted here. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID。如果RN-MME没有改变，这个标识可以重用MME为UE在旧的S1接口上分配的标识。如果MME改变了，新的MME会分配新的UE标识。-Identification of the new S1 interface of the RN between the T-DeNB and the RN-MME: new MME UES1 AP ID. If the RN-MME has not changed, this identity can reuse the identity allocated by the MME for the UE on the old S1 interface. If the MME is changed, the new MME will assign a new UE identity.

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

-源到目的的透明传输的容器。- Container for transparent transfer from source to destination.

-要建立的E-RAB信息的列表，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- A list of E-RAB information to be established, such as E-RAB identifier, uplink TEID and transport layer address allocated by RN-GW, and Qos information.

所述切换请求消息还包含RN服务的UE的信息。包含该信息是为了在RN的网关(SGW和PGW，图中的RN-GW)和T-DeNB之间为UE建立传输数据的隧道。所述UE的信息包含UE的标识和隧道信息：The handover request message also includes the information of the UE served by the RN. The purpose of including this information is to establish a data transmission tunnel for the UE between the gateway of the RN (SGW and PGW, RN-GW in the figure) and the T-DeNB. The UE information includes UE identity and tunnel information:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID；eNB UE S1 AP ID；(可以只包含其中一个标识)。-Identifier of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID; eNB UE S1 AP ID; (may contain only one of the identifiers).

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE的E-RAB信息的列表，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- A list of E-RAB information of UE, such as E-RAB identifier, uplink TEID and transport layer address assigned by RN-GW, and Qos information.

通过上述步骤，T-DeNB就接收到了移动RN切换前RN-GW为UE分配的上行隧道信息。Through the above steps, the T-DeNB has received the uplink tunnel information allocated by the RN-GW for the UE before the mobile RN handover.

步骤704：T-DeNB发送切换响应消息给RN-MME。消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 704: T-DeNB sends a handover response message to RN-MME. The message contains existing information regarding the RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID。-Identification of the new S1 interface of RN between T-DeNB and RN-MME: new MME UES1 AP ID, new eNB UE S1 AP ID.

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

-成功建立的E-RAB信息的列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- A list of successfully established E-RAB information, including E-RAB information, such as E-RAB identifier, downlink TEID and transport layer address allocated by T-DeNB.

所述切换响应消息还包含RN服务的UE的信息。包含该信息是为了在RN的网关(SGW和PGW)和T-DeNB之间为UE建立传输数据的隧道。所述UE的信息包含UE的S1接口新标识和隧道信息(UE的信息可以包含下述一个或者多个或者所有)，具体地：The handover response message also includes the information of the UE served by the RN. The purpose of including this information is to establish a data transmission tunnel for the UE between the gateways (SGW and PGW) of the RN and the T-DeNB. The information of the UE includes the new identity of the S1 interface of the UE and tunnel information (the information of the UE may include one or more or all of the following), specifically:

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE的标识，例如UE的临时标识S-TMSI；(在MME UE S1 AP ID、eNB UE S1 AP ID和UE的标识中可以只包含其中一个标识，用于RN-MME识别相应UE)；- The identity of the UE, such as the UE's temporary identity S-TMSI; (MME UE S1 AP ID, eNB UE S1 AP ID and UE identity can only contain one of the identity, used for RN-MME to identify the corresponding UE);

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID and transport layer address allocated by T-DeNB.

通过本步骤，RN-MME就接收到了T-DeNB为UE分配的下行隧道信息和新的S1接口标识。Through this step, the RN-MME has received the downlink tunnel information and the new S1 interface identifier allocated to the UE by the T-DeNB.

步骤705：RN-MME发送切换命令消息给S-DeNB。消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 705: RN-MME sends a handover command message to S-DeNB. The message contains existing information regarding the RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID。-Identification of the new S1 interface of RN between T-DeNB and RN-MME: new MME UES1 AP ID, new eNB UE S1 AP ID.

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

步骤706：S-DeNB发送RRC消息切换命令给RN，让RN切换到目的DeNB上面的目的小区。消息与目前的RRC消息一样，在此省略。Step 706: The S-DeNB sends an RRC message handover command to the RN, so that the RN is handed over to the target cell on the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤707：RN跟目的小区同步，发送上行RRC消息切换完成给目DeNB。消息与目前的RRC消息一样，在此省略。Step 707: The RN synchronizes with the target cell, and sends an uplink RRC message handover complete to the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤708：目的DeNB发送路径切换消息给RN-MME，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 708: The target DeNB sends a path switching message to the RN-MME, and the message includes the existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID。-Identification of the new S1 interface of RN between T-DeNB and RN-MME: MME UE S1 APID, eNB UE S1 AP ID.

-目的小区的标识。- The identity of the destination cell.

-目的TAI。- Purpose TAI.

步骤709：RN-MME发送改变承载请求消息给RN的网关(SGW和PGW)。Step 709: RN-MME sends a change bearer request message to the gateways (SGW and PGW) of the RN.

改变承载请求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：The Change Bearer Request message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

所述改变承载请求消息还包含RN服务的UE的信息。所述UE的信息包含(可以是一个或者多个或者所有)：The change bearer request message also includes the information of the UE served by the RN. The information of the UE includes (can be one or more or all):

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE的标识，例如UE的临时标识S-TMSI；- The identity of the UE, such as the temporary identity S-TMSI of the UE;

-UE的E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- E-RAB information of UE, such as E-RAB identifier, downlink TEID and transport layer address allocated by T-DeNB.

通过本步骤，RN-MME就将步骤704中接收的T-DeNB为UE分配的下行隧道信息发送给了RN-GW。Through this step, the RN-MME sends the downlink tunnel information allocated to the UE by the T-DeNB received in step 704 to the RN-GW.

或者，步骤709可以用下面两个步骤代替：Alternatively, step 709 can be replaced by the following two steps:

一：RN-MME发送改变承载请求消息给RN的网关(SGW和PGW)。改变承载请求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：One: The RN-MME sends a bearer change request message to the gateways (SGW and PGW) of the RN. The Change Bearer Request message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

二：T-DeNB发送路径更新消息给RN-GW，消息包含RN服务的UE的信息。所述UE的信息包含(UE的信息可以包含下述一个或者多个或者所有)：Two: The T-DeNB sends a path update message to the RN-GW, and the message includes the information of the UE served by the RN. The information of the UE includes (the information of the UE may include one or more or all of the following):

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE的标识，例如UE的临时标识S-TMSI；- The identity of the UE, such as the temporary identity S-TMSI of the UE;

-UE的E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- E-RAB information of UE, such as E-RAB identifier, downlink TEID and transport layer address allocated by T-DeNB.

步骤710：RN的网关(SGW和PGW)发送改变承载响应消息给RN-MME。消息包含RN和RN服务的UE的信息：Step 710: The gateway (SGW and PGW) of the RN sends a change bearer response message to the RN-MME. The message contains information about the RN and the UE served by the RN:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID assigned by RN-GW, and transport layer address.

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE的标识，例如UE的临时标识S-TMSI；- The identity of the UE, such as the temporary identity S-TMSI of the UE;

-UE的E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID，传输层地址。- E-RAB information of UE, such as E-RAB identifier, uplink TEID assigned by RN-GW, and transport layer address.

同步骤709一样，如果步骤709用两个消息实现，步骤710也用两个响应消息实现。Same as step 709, if step 709 is implemented with two messages, step 710 is also implemented with two response messages.

响应消息一：RN的网关(SGW和PGW)发送改变承载响应消息给RN-MME。消息包含RN的信息：Response message 1: the gateway (SGW and PGW) of the RN sends a change bearer response message to the RN-MME. The message contains the RN's information:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID assigned by RN-GW, and transport layer address.

响应消息二：RN的网关(SGW和PGW)发送路径更新响应消息给T-DeNB。消息包含RN服务的UE的信息：Response message 2: the gateway (SGW and PGW) of the RN sends a path update response message to the T-DeNB. The message contains the information of the UE served by the RN:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE的E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID，传输层地址。- E-RAB information of UE, such as E-RAB identifier, uplink TEID assigned by RN-GW, and transport layer address.

至此，T-DeNB与RN-GW间的上行和下行隧道信息已经传输完毕，可以进行隧道建立。So far, the uplink and downlink tunnel information between the T-DeNB and the RN-GW has been transmitted, and the tunnel can be established.

步骤711：RN-MME发送UE上下文释放命令消息给S-DeNB，释放S-DeNB上面保存的跟RN和RN上面的UE有关系的上下文信息。消息包含UE在旧的S1上面的标识eNB S1 AP ID和MME S1 AP ID，或者只包含MMES1 AP ID，消息还包含释放的原因，该消息和目前定义的消息不同之处在于该消息可以包含多个UE的上下文信息，通过在消息中包含一组UE的S1接口上的标识。Step 711: The RN-MME sends a UE context release command message to the S-DeNB to release the context information stored on the S-DeNB that is related to the RN and the UE on the RN. The message contains the eNB S1 AP ID and MME S1 AP ID of the UE on the old S1, or only contains the MMES1 AP ID, and the message also contains the reason for the release. The difference between this message and the currently defined message is that this message can contain multiple The context information of a UE is obtained by including the identifiers on the S1 interface of a group of UEs in the message.

步骤712：S-DeNB发送UE上下文释放完成消息给RN-MME。Step 712: S-DeNB sends UE context release complete message to RN-MME.

步骤713：RN和T-DeNB之间要建立S1接口。切换后，T-DeNB成为了RN的新的DeNB，为了描述方便，仍然把它称做T-DeNB。RN发送S1建立请求消息给T-DeNB。消息包含RN的基站标识，RN支持的TAI。消息还包含RN上面UE的信息，UE的信息包含下列信息：Step 713: An S1 interface needs to be established between the RN and the T-DeNB. After the handover, the T-DeNB becomes the new DeNB of the RN, and for the convenience of description, it is still called the T-DeNB. RN sends S1 establishment request message to T-DeNB. The message includes the base station identifier of the RN and the TAI supported by the RN. The message also contains the information of the UE on the RN, and the information of the UE includes the following information:

-UE服务的GUMMEI信息。- GUMMEI information of UE service.

-UE在RN和S-DeNB之间的旧的S1接口标识：eNB UE S1 AP ID。- The old S1 interface identifier of UE between RN and S-DeNB: eNB UE S1 AP ID.

-UE在T-DeNB和UE-MME之间的新的S1接口的标识：new eNB UE S1AP ID；-Identification of the new S1 interface of UE between T-DeNB and UE-MME: new eNB UE S1AP ID;

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID；-Identification of the UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID;

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息，RRC上下文，切换限制列表，位置汇报信息；- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established, RRC context, handover restriction list, location report information;

-其他信息，例如，UE的历史信息，根据激活信息。- Other information, eg UE's history information, according to the activation information.

RN上面UE的信息也可以在S1建立后，通过单独的消息发送给T-DeNB。The UE information on the RN can also be sent to the T-DeNB through a separate message after S1 is established.

步骤714：T-DeNB发送S1建立响应消息，消息包含T-DeNB作为MME应该传输给RN的信息：Step 714: T-DeNB sends S1 establishment response message, the message contains the information that T-DeNB as MME should transmit to RN:

-Served GUMMEI信息列表，GUMMEI信息包含PLMN标识，MME组标识，MME码。-Served GUMMEI information list, GUMMEI information includes PLMN identification, MME group identification, MME code.

-MME支持RN的指示。- Indication that the MME supports the RN.

-MME的容量信息。- Capacity information of the MME.

S1建立响应消息还包含跟RN上面的UE有关的信息，包含The S1 establishment response message also includes information related to the UE on the RN, including

-UE在RN和T-DeNB之间的新的S1接口的标识：new eNB UE S1 AP ID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between RN and T-DeNB: new eNB UE S1 AP ID, new MME UE S1 AP ID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的上行的TEID和传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID and transport layer address allocated by T-DeNB.

跟步骤614一致，RN上面UE的信息也可以在S1建立后，通过单独的消息响应发送给T-DeNB。Consistent with step 614, the UE information on the RN may also be sent to the T-DeNB through a separate message response after S1 is established.

至此，S1接口建立完成，并在该接口建立过程中，实现了RN与T-DeNB间的隧道信息传输。或者，也可以在S1接口建立完成后，传输RN与T-DeNB间的隧道信息。So far, the establishment of the S1 interface is completed, and during the establishment process of the interface, the tunnel information transmission between the RN and the T-DeNB is realized. Alternatively, the tunnel information between the RN and the T-DeNB may also be transmitted after the establishment of the S1 interface is completed.

接下来，更新UE-MME和RN-GW上的UE标识。Next, update UE identities on UE-MME and RN-GW.

步骤715：T-DeNB找到UE的服务MME，发送消息去更新服务MME上保存的UE的信息，消息包含Step 715: T-DeNB finds the serving MME of the UE, and sends a message to update the information of the UE stored on the serving MME, the message includes

-UE在S-DeNB和MME之间的S1接口的旧标识：MME UE S1 AP ID，eNB UE S1 AP ID；- The old identity of UE's S1 interface between S-DeNB and MME: MME UE S1 AP ID, eNB UE S1 AP ID;

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 AP ID- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 AP ID

步骤716：UE的服务MME，发送消息给T-DeNB来更新UE的标识。消息可以包含一组UE的信息，一个UE的信息包含的信息：Step 716: The serving MME of the UE sends a message to the T-DeNB to update the identity of the UE. The message can contain a group of UE information, and the information contained in a UE information:

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID，new MME UE S1 AP ID。- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-加密信息。- Encrypted information.

步骤717：更新RN-GW上面保存的UE的标识，可以通过几种方法来实现。Step 717: Updating the identity of the UE stored on the RN-GW can be implemented through several methods.

一：T-DeNB发送信息更新消息给RN-GW，消息包含：One: T-DeNB sends an information update message to RN-GW, the message includes:

-UE在S-DeNB和MME之间的S1接口的旧标识：MME UE S1 AP ID，eNB UE S1 AP ID。；- The old identity of the UE's S1 interface between S-DeNB and MME: MME UE S1 AP ID, eNB UE S1 AP ID. ;

-UE在T-DeNB和MME之间的S1接口的新标识：new MME UE S1 APID，new eNB UE S1 AP ID。- New identification of the UE's S1 interface between T-DeNB and MME: new MME UE S1 APID, new eNB UE S1 AP ID.

二：UE-MME发送信息更新消息给RN-GW，消息包含：Two: UE-MME sends an information update message to RN-GW, the message includes:

-UE在S-DeNB和MME之间的S1接口的旧标识：MME UE S1 AP ID，eNB UE S1 AP ID；- The old identity of UE's S1 interface between S-DeNB and MME: MME UE S1 AP ID, eNB UE S1 AP ID;

-UE在T-DeNB和MME之间的S1接口的新标识，new MME UE S1 APID，new eNB UE S1 AP ID。- The new identity of the UE's S1 interface between T-DeNB and MME, new MME UE S1 APID, new eNB UE S1 AP ID.

在上述流程中，相应信息中可能会包含UE的S1接口旧标识(MME UES1 AP ID，eNB UE S1 AP ID)和/或UE的唯一标识(例如UE的临时标识)，将其统称为UE标识，其作用在于识别相应的UE，在具体实现时，可以在相应消息中包含上述几种标识之一或任意组合，但一般地，在实体间传输的UE标识应当是一致的。In the above process, the corresponding information may contain the old identity of the S1 interface of the UE (MME UES1 AP ID, eNB UE S1 AP ID) and/or the unique identity of the UE (such as the temporary identity of the UE), which are collectively referred to as the UE identity , whose role is to identify the corresponding UE. In specific implementation, one or any combination of the above-mentioned identifiers may be included in the corresponding message, but generally, the UE identifiers transmitted between entities should be consistent.

实施例二Embodiment two

实施例二是RN通过S1接口切换到目的DeNB的流程图。RN的S/P GW没有改变。在RN切换的过程之后，要为UE建立起来RN的S/PGW和T-DeNB之间的用于传输数据的隧道，RN和T-DeNB之间建立起来用于传输数据的隧道。RN切换到目的DeNB，RN服务的MME也可以切换到新的MME上面。实施例二以RN的服务MME没有改变为例子。如果RN的服务MME改变了，还涉及源MME和目的MME之间的消息的转递。图8省略了源MME和目的MME之间的消息。下面是对图8的具体说明：Embodiment 2 is a flow chart of the RN handing over to the target DeNB through the S1 interface. RN's S/PGW has not changed. After the RN handover process, a tunnel for transmitting data between the S/PGW of the RN and the T-DeNB shall be established for the UE, and a tunnel for transmitting data shall be established between the RN and the T-DeNB. The RN is handed over to the target DeNB, and the MME served by the RN can also be handed over to the new MME. In the second embodiment, the serving MME of the RN is not changed as an example. If the serving MME of the RN changes, it also involves the transfer of messages between the source MME and the destination MME. Figure 8 omits the messages between the source MME and the destination MME. The following is a specific description of Figure 8:

步骤801：RN对周围的无线环境进行测量，并且把测量报告发送给服务的DeNB(图中的S-DeNB)。根据测量汇报，DeNB决定把RN切换到信号质量更好的目的DeNB(图中的T-DeNB)。Step 801: RN measures the surrounding wireless environment, and sends the measurement report to the serving DeNB (S-DeNB in the figure). According to the measurement report, the DeNB decides to switch the RN to the target DeNB with better signal quality (T-DeNB in the figure).

步骤802：S-DeNB发送切换需要消息给RN的服务MME，即图中的RN-MME，所述切换需求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 802: The S-DeNB sends a handover requirement message to the RN's serving MME, that is, the RN-MME in the figure. The handover requirement message includes the existing information regarding the RN as a UE. The existing information of the RN as UE includes:

-RN在S-DeNB和RN-MME之间的旧的S1接口的标识：eNB UE S1 APID，MME UE S1 AP ID；-Identification of RN's old S1 interface between S-DeNB and RN-MME: eNB UE S1 APID, MME UE S1 AP ID;

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

-切换的目的地址，此处切换目的的T-DeNB的标识，由此标识MME可以找到T-DeNB。- Handover destination address, where the handover destination T-DeNB is identified, thereby identifying the T-DeNB that the MME can find.

-源到目的的透明传输的容器- Container for transparent transfer from source to destination

所述消息还包含RN服务的UE的信息。RN服务的UE的一些信息需要在切换过程中切换到目的DeNB，可以包含多个UE的信息，每个UE的信息包含(UE的信息可以包含下述一个或者多个或者所有)：The message also includes information about the UE served by the RN. Some information of the UE served by the RN needs to be handed over to the target DeNB during the handover process, which may contain information of multiple UEs, and the information of each UE includes (the information of the UE may include one or more or all of the following):

-UE在S-DeNB和UE-MME之间的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID；-Identification of UE's S1 interface between S-DeNB and UE-MME: eNB UE S1 AP ID, MME UE S1 AP ID;

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information.

步骤803：RN-MME发送切换请求给T-DeNB，消息包含把RN当成UE的现有信息。如果RN-MME改变了，旧的MME需要转发消息给目的MME，在此省略了两个MME转发消息的过程。所述RN当成UE的现有信息包含：Step 803: RN-MME sends a handover request to T-DeNB, and the message includes the existing information regarding RN as UE. If the RN-MME changes, the old MME needs to forward the message to the destination MME, and the process of two MMEs forwarding the message is omitted here. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID。如果RN-MME没有改变，这个标识可以重用MME为UE在旧的S1接口上分配的标识。如果MME改变了，新的MME会分配新的UE标识。-Identification of the new S1 interface of the RN between the T-DeNB and the RN-MME: new MME UES1 AP ID. If the RN-MME has not changed, this identity can reuse the identity allocated by the MME for the UE on the old S1 interface. If the MME is changed, the new MME will assign a new UE identity.

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

-源到目的的透明传输的容器。- Container for transparent transfer from source to destination.

-要建立的E-RAB信息的列表，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- A list of E-RAB information to be established, such as E-RAB identifier, uplink TEID and transport layer address allocated by RN-GW, and Qos information.

所述消息还包含RN服务的UE的信息。RN服务的UE的一些信息需要在切换过程中切换到目的DeNB，可以包含多个UE的信息，每个UE的信息包含(UE的信息可以包含下述一个或者多个或者所有)：The message also includes information about the UE served by the RN. Some information of the UE served by the RN needs to be handed over to the target DeNB during the handover process, which may contain information of multiple UEs, and the information of each UE includes (the information of the UE may include one or more or all of the following):

-UE在S-DeNB和UE-MME之间的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID；-Identification of UE's S1 interface between S-DeNB and UE-MME: eNB UE S1 AP ID, MME UE S1 AP ID;

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information.

-其他信息，例如，UE的历史信息，根据激活信息。- Other information, eg UE's history information, according to the activation information.

步骤804：T-DeNB发送切换响应消息给RN-MME。消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 804: T-DeNB sends a handover response message to RN-MME. The message contains existing information regarding the RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID。-Identification of the new S1 interface of RN between T-DeNB and RN-MME: new MME UES1 AP ID, new eNB UE S1 AP ID.

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

-成功建立的E-RAB信息的列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- A list of successfully established E-RAB information, including E-RAB information, such as E-RAB identifier, downlink TEID and transport layer address allocated by T-DeNB.

步骤805：RN-MME发送切换命令消息给S-DeNB。消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 805: RN-MME sends a handover command message to S-DeNB. The message contains existing information regarding the RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID；-Identification of RN's new S1 interface between T-DeNB and RN-MME: new MME UES1 AP ID, new eNB UE S1 AP ID;

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

-切换类型，此处切换类型是移动中继的切换类型。- Handover type, where the handover type is the handover type of the mobile relay.

步骤806：S-DeNB发送RRC消息切换命令给RN，让RN切换到目的DeNB上面的目的小区。消息给目前的RRC消息一样，在此省略。Step 806: The S-DeNB sends an RRC message handover command to the RN, so that the RN is handed over to the target cell on the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤807：RN跟目的小区同步，发送上行RRC消息切换完成给目DeNB。消息给目前的RRC消息一样，在此省略。Step 807: The RN synchronizes with the target cell, and sends an uplink RRC message handover complete to the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤808：目的DeNB发送路径切换消息给RN-MME，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 808: The target DeNB sends a path switch message to the RN-MME, and the message includes the existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID。-Identification of the new S1 interface of RN between T-DeNB and RN-MME: new MME UES1 AP ID, new eNB UE S1 AP ID.

-目的小区的标识。- The identity of the destination cell.

-目的TAI。- Purpose TAI.

步骤809：RN-MME发送改变承载请求消息给RN的网关(SGW和PGW)。改变承载请求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 809: RN-MME sends a change bearer request message to the gateways (SGW and PGW) of the RN. The Change Bearer Request message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

步骤810：RN的网关(SGW和PGW)发送改变承载响应消息给RN-MME。改变承载响应消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 810: The gateway (SGW and PGW) of the RN sends a change bearer response message to the RN-MME. The Change Bearer Response message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN SGW分配的上行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN SGW, and transport layer address.

步骤811：RN-MME发送UE上下文释放命令消息给S-DeNB，释放S-DeNB上面保存的跟RN有关系的上下文信息。消息包含RN的标识和释放的原因。Step 811: RN-MME sends a UE context release command message to S-DeNB to release context information related to RN stored on S-DeNB. The message contains the identity of the RN and the reason for the release.

步骤812：S-DeNB发送UE上下文释放完成消息给RN-MME。Step 812: S-DeNB sends UE context release complete message to RN-MME.

到了812步骤，RN作为UE的切换过程结束。上述步骤中，在T-DeNB与RN-GW间建立了传输了RN数据的隧道信息和RN与DeNB之间的Un接口的无线承载信息，但是没有传输UE用户数据的隧道信息，UE的隧道信息将在切换完成后进行传输。At step 812, the handover process of RN as UE ends. In the above steps, the tunnel information for transmitting RN data and the radio bearer information of the Un interface between RN and DeNB are established between T-DeNB and RN-GW, but there is no tunnel information for transmitting UE user data, and the tunnel information for UE The transfer will take place after the switchover is complete.

步骤813：RN和T-DeNB之间要建立S1接口。切换后，T-DeNB成为了RN的新的DeNB，为了描述方便，仍然把它成做T-DeNB。RN发送S1建立请求消息给T-DeNB。消息包含RN的基站标识，RN支持的TAI。消息还包含RN上面UE的信息，UE的信息包含下列信息，(可以是一个或者多个或者所有)：Step 813: An S1 interface needs to be established between the RN and the T-DeNB. After the handover, the T-DeNB becomes the new DeNB of the RN, and for convenience of description, it is still referred to as the T-DeNB. RN sends S1 establishment request message to T-DeNB. The message includes the base station identifier of the RN and the TAI supported by the RN. The message also includes the information of the UE on the RN, and the information of the UE includes the following information (can be one or more or all):

-UE在RN和S-DeNB之间的旧的S1接口标识：MME UE S1 AP ID，eNB UE S1 AP ID；- UE's old S1 interface identifier between RN and S-DeNB: MME UE S1 AP ID, eNB UE S1 AP ID;

-UE在RN和T-DeNB之间的新的S1接口标识：new eNB UE S1 AP ID；- The new S1 interface identifier of UE between RN and T-DeNB: new eNB UE S1 AP ID;

-UE服务的GUMMEI信息。- GUMMEI information of UE service.

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE的标识，例如S-TMSI。- UE's identity, eg S-TMSI.

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information.

-其他信息，例如，UE的历史信息，根据激活信息。RN上面UE的信息也可以在S1建立后，通过单独的消息发送给T-DeNB。- Other information, eg UE's history information, according to the activation information. The UE information on the RN can also be sent to the T-DeNB through a separate message after S1 is established.

步骤814：T-DeNB发送S1建立响应消息，消息包含T-DeNB作为MME应该传输给RN的信息：Step 814: T-DeNB sends S1 establishment response message, the message contains the information that T-DeNB as MME should transmit to RN:

-Served GUMMEI信息列表，GUMMEI信息包含PLMN标识，MME组标识，MME码。-Served GUMMEI information list, GUMMEI information includes PLMN identification, MME group identification, MME code.

-MME支持RN的指示。- Indication that the MME supports the RN.

-MME的容量信息。- Capacity information of the MME.

S1建立响应消息还包含跟RN上面的UE有关的信息，包含The S1 establishment response message also includes information related to the UE on the RN, including

-UE在RN和T-DeNB之间的新的S1接口的标识：new eNB UE S1 AP ID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between RN and T-DeNB: new eNB UE S1 AP ID, new MME UE S1 AP ID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的上行的TEID和传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID and transport layer address allocated by T-DeNB.

至此，S1接口建立完成，并在该接口建立过程中，实现了RN与T-DeNB间的隧道信息传输。So far, the establishment of the S1 interface is completed, and during the establishment process of the interface, the tunnel information transmission between the RN and the T-DeNB is realized.

跟步骤813一致，UE的信息也可以通过S1接口建立后的单独的响应消息发送给RN。Consistent with step 813, the information of the UE may also be sent to the RN through a separate response message after the S1 interface is established.

值得注意的是，813步骤和814步骤可以作为单独的过程，和其他方法结合使用，并不只局限于和本实施例中的步骤组合使用。It should be noted that step 813 and step 814 can be used as an independent process in combination with other methods, and are not limited to being used in combination with the steps in this embodiment.

步骤815：T-DeNB找到UE的服务MME，发送路径切换请求消息去更新服务MME上保存的UE的信息，消息包含Step 815: The T-DeNB finds the serving MME of the UE, and sends a path switching request message to update the information of the UE stored on the serving MME. The message includes

-UE在S-DeNB和MME之间的S1接口的旧标识：eNB UE S1 AP ID，MME UE S1 AP ID；- The old identity of the UE's S1 interface between S-DeNB and MME: eNB UE S1 AP ID, MME UE S1 AP ID;

-UE在T-DeNB和MME之间的S1接口的新标识：new eNB UE S1 APID；- The new identity of the UE's S1 interface between T-DeNB and MME: new eNB UE S1 APID;

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配下行的TEID，传输层地址；- UE's E-RAB information list, including E-RAB information, such as E-RAB identification, T-DeNB allocated downlink TEID, transport layer address;

-RN GW的地址。- Address of RN GW.

步骤816：UE-MME发送改变承载请求消息或者建立承载请求消息给RN的网关，消息包含一组UE的信息，每个UE的信息包含：Step 816: The UE-MME sends a bearer change request message or a bearer establishment request message to the gateway of the RN, the message includes information of a group of UEs, and the information of each UE includes:

-UE的标识，例如UE的S-TMSI。- The identity of the UE, such as the S-TMSI of the UE.

-UE在S-DeNB和UE-MME之间的S1接口的标识：new eNB S1 AP ID，MME S1 AP ID；-Identification of the UE's S1 interface between S-DeNB and UE-MME: new eNB S1 AP ID, MME S1 AP ID;

-UE在T-DeNB和MME之间的S1接口的新标识：new eNB UE S1 APID；- The new identity of the UE's S1 interface between T-DeNB and MME: new eNB UE S1 APID;

-要建立的该UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- The E-RAB information list of the UE to be established, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

步骤817：RN的网关发送改变承载响应消息给UE-MME，消息包含一组UE的信息，每个UE的信息包含：Step 817: The gateway of the RN sends a change bearer response message to the UE-MME, the message includes information of a group of UEs, and the information of each UE includes:

-UE的标识，例如UE的S-TMSI。- The identity of the UE, such as the S-TMSI of the UE.

-UE在S-DeNB和UE-MME之间的S1接口的标识，eNB S1 AP ID，MME S1 AP ID。- The identification of the UE's S1 interface between the S-DeNB and the UE-MME, the eNB S1 AP ID, and the MME S1 AP ID.

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 AP ID，new MME S1 AP ID。- The new identity of the UE's S1 interface between T-DeNB and MME, new eNB UE S1 AP ID, new MME S1 AP ID.

-要建立的该UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。- The E-RAB information list of the UE to be established, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

步骤818：UE-MME发送响应消息给T-DeNB。消息包含Step 818: UE-MME sends a response message to T-DeNB. message contains

-UE在T-DeNB和MME之间的新的S1接口的标识，new eNB UE S1 APID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-加密信息。- Encrypted information.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

上述步骤815-818，实现了T-DeNB与RN-GW间UE隧道信息的传输，至此，即可以建立起T-DeNB与RN-GW间的隧道，用于传输UE信息。The above steps 815-818 realize the transmission of UE tunnel information between T-DeNB and RN-GW, so far, the tunnel between T-DeNB and RN-GW can be established for transmitting UE information.

与实施例一中类似地，上述流程的相应信息中可能会包含UE的S1接口旧标识(MME UE S1 AP ID，eNB UE S1 AP ID)和/或UE的唯一标识(例如UE的临时标识)，将其统称为UE标识，其作用在于识别相应的UE，具体实现时，可以在相应消息中包含上述几种标识之一或任意组合，但一般地，在实体间传输的UE标识应当是一致的。Similar toEmbodiment 1, the corresponding information in the above process may include the old identifier of the S1 interface of the UE (MME UE S1 AP ID, eNB UE S1 AP ID) and/or the unique identifier of the UE (such as the temporary identifier of the UE) , which are collectively referred to as UE identities, and its function is to identify the corresponding UE. In specific implementation, one or any combination of the above-mentioned identities can be included in the corresponding message, but generally, the UE identities transmitted between entities should be consistent of.

实施例三Embodiment Three

图9是RN通过X2接口切换到目的DeNB的流程图。RN的S/P GW没有改变。在RN切换的过程中，要为UE建立起来RN的S/PGW和T-DeNB之间的用于传输数据的隧道。下面是对图9的具体说明：FIG. 9 is a flow chart of the RN handing over to the target DeNB through the X2 interface. RN's S/PGW has not changed. In the process of RN handover, a tunnel for transmitting data between the S/PGW of the RN and the T-DeNB shall be established for the UE. The following is a specific description of Figure 9:

步骤901：RN对周围的无线环境进行测量，并且把测量报告发送给服务的DeNB(图中的S-DeNB)。根据测量汇报，DeNB决定把RN切换到信号质量更好的目的DeNB(图中的T-DeNB)，S-DeNB和T-DeNB之间已经建立的X2接口，S-DeNB发起X2切换。Step 901: RN measures the surrounding wireless environment, and sends the measurement report to the serving DeNB (S-DeNB in the figure). According to the measurement report, the DeNB decides to switch the RN to the target DeNB with better signal quality (T-DeNB in the figure), the X2 interface has been established between the S-DeNB and the T-DeNB, and the S-DeNB initiates the X2 handover.

步骤902：S-DeNB发送切换请求消息给T-DeNB，所述切换需求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 902: the S-DeNB sends a handover request message to the T-DeNB, and the handover request message includes the existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- RN's old UE identity on S-DeNB: old eNB UE X2 AP ID;

-切换原因，此处切换原因是移动中继的切换。- The handover reason, where the handover reason is the handover of the mobile relay.

-切换的目的地址，此处切换目的小区的标识。- handover destination address, where the identity of the handover destination cell.

-MME的标识GUMMEI。- the identifier GUMMEI of the MME.

-RRC上下文-RRC context

-要建立的E-RAB的信息，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- Information of the E-RAB to be established, such as the E-RAB identifier, the uplink TEID and transport layer address allocated by the RN-GW, and Qos information.

所述切换请求消息还包含RN服务的UE的信息。UE的信息也可以通过单独的切换请求消息传输，信息包含一个或者多个UE的信息，包含该信息是为了在RN的网关(SGW和PGW)和T-DeNB之间为UE建立传输数据的隧道。所述UE的信息包含UE的标识和隧道信息(UE的信息可以包含下述一个或者多个或者所有)：The handover request message also includes the information of the UE served by the RN. UE information can also be transmitted through a separate handover request message, the information contains one or more UE information, and the information is included to establish a data transmission tunnel for the UE between the RN gateway (SGW and PGW) and the T-DeNB . The UE information includes UE identity and tunnel information (UE information may include one or more or all of the following):

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：eNB UE S1 APID，MME UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: eNB UE S1 APID, MME UE S1 AP ID;

-UE在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- The old UE ID of the UE on the S-DeNB: old eNB UE X2 AP ID;

-UE的MME的标识GUMMEI。- the identity GUMMEI of the UE's MME.

-UE的E-RAB信息，例如E-RAB标识，RN-GW分配的上行的TEID和传输层地址，Qos信息。- E-RAB information of UE, such as E-RAB identifier, uplink TEID and transport layer address assigned by RN-GW, Qos information.

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, RRC context, handover restriction list, and location report information.

其中，UE的标识为RN切换前UE的旧标识，本实施例中，可能是S1接口旧标识eNB UE S1 AP ID，MME UE S1 AP ID，S-DeNB上UE的旧标识old eNB UE X2 AP ID，具体实现时可以在消息中包括上述几种标识中的一种或任意组合，用于识别相应UE。一般地，在后续发送的消息中出现的UE旧标识与本步骤的UE标识相同。Among them, the UE ID is the old ID of the UE before the RN handover. In this embodiment, it may be the old ID of the S1 interface eNB UE S1 AP ID, MME UE S1 AP ID, and the old ID of the UE on the S-DeNB old eNB UE X2 AP The ID, during specific implementation, may include one or any combination of the above-mentioned identifiers in the message, so as to identify the corresponding UE. Generally, the old UE identity appearing in the message sent subsequently is the same as the UE identity in this step.

步骤903：T-DeNB发送切换响应消息给S-DeNB，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 903: T-DeNB sends a handover response message to S-DeNB, and the message includes the existing information regarding RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB的新的标识：new eNB UE X2 AP ID。-New identification of RN in T-DeNB: new eNB UE X2 AP ID.

-RN在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- RN's old UE identity on S-DeNB: old eNB UE X2 AP ID;

-接受的E-RAB信息，包含E-RAB标识，T-DeNB的IP地址和隧道标识，用来接收RN-GW发送过来的数据。- The received E-RAB information includes the E-RAB identifier, the IP address of the T-DeNB and the tunnel identifier, and is used to receive the data sent by the RN-GW.

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

所述切换响应消息还包含RN服务的UE的信息。所述UE的信息包含：The handover response message also includes the information of the UE served by the RN. The UE information includes:

-UE在T-DeNB的新的标识：new eNB UE X2 AP ID。-New ID of UE in T-DeNB: new eNB UE X2 AP ID.

-UE在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- The old UE ID of the UE on the S-DeNB: old eNB UE X2 AP ID;

-接受的E-RAB信息，包含E-RAB标识，T-DeNB的IP地址和隧道标识，用来接收RN-GW发送过来的数据。- The received E-RAB information includes the E-RAB identifier, the IP address of the T-DeNB and the tunnel identifier, and is used to receive the data sent by the RN-GW.

通过上述步骤，T-DeNB就接收到并接受了RN切换前RN-GW为UE分配的上行隧道信息，并且T-DeNB也给用户数据分配了下行数据接收的隧道。Through the above steps, the T-DeNB receives and accepts the uplink tunnel information allocated by the RN-GW for the UE before the RN handover, and the T-DeNB also allocates a downlink data receiving tunnel for user data.

步骤904：S-DeNB发送RRC消息切换命令给RN，让RN切换到目的DeNB上面的目的小区。消息给目前的RRC消息一样，在此省略。Step 904: S-DeNB sends an RRC message handover command to RN, so that RN is handed over to the target cell on the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤905：RN跟目的小区同步，发送上行RRC消息切换完成给目DeNB。消息给目前的RRC消息一样，在此省略。Step 905: RN synchronizes with the target cell, and sends an uplink RRC message handover complete to the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤906：目的DeNB发送路径切换请求消息给RN-MME，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 906: The target DeNB sends a path switching request message to the RN-MME, and the message includes the existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new eNB UE S1AP ID-Identification of RN's new S1 interface between T-DeNB and RN-MME: new eNB UE S1AP ID

-RN在S-DeNB和RN-MME之间的旧的S1接口的标识：MME UE S1 APID-Identification of RN's old S1 interface between S-DeNB and RN-MME: MME UE S1 APID

-切换的E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- Handover E-RAB information, such as E-RAB identifier, downlink TEID and transport layer address assigned by T-DeNB.

-目的小区标识。- Target cell identity.

-目的TAI。- Purpose TAI.

所述路径切换请求消息还包含RN上的UE的信息，可以包含一个多个UE的信息，每个UE的信息包含：The path switching request message also includes information about UEs on the RN, and may include information about one or more UEs, and the information about each UE includes:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID。-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID.

-切换的E-RAB信息。例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- Toggle E-RAB information. For example, the E-RAB identifier, the downlink TEID and the transport layer address assigned by the T-DeNB.

通过本步骤，RN-MME就接收到了T-DeNB为UE分配的下行隧道信息。Through this step, the RN-MME has received the downlink tunnel information allocated to the UE by the T-DeNB.

步骤907：RN-MME发送改变承载请求消息给RN的网关(SGW和PGW)。改变承载请求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 907: RN-MME sends a change bearer request message to the gateways (SGW and PGW) of the RN. The Change Bearer Request message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的标识。可以是RN-MME为RN分配的临时标识，例如P-TMSI。- identification of RN. It may be a temporary identifier assigned to the RN by the RN-MME, such as P-TMSI.

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

消息还包含RN服务的UE的信息，所述UE的信息包含：The message also includes the information of the UE served by the RN, and the information of the UE includes:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID。-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID.

-UE的标识，例如UE的临时标识P-TMSI。- The identity of the UE, such as the temporary identity P-TMSI of the UE.

-切换的E-RAB信息。例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- Toggle E-RAB information. For example, the E-RAB identifier, the downlink TEID and the transport layer address assigned by the T-DeNB.

通过本步骤，RN-MME就将步骤906中接收的T-DeNB为UE分配的下行隧道信息发送给了RN-GW。Through this step, the RN-MME sends the downlink tunnel information allocated to the UE by the T-DeNB received in step 906 to the RN-GW.

步骤908：RN的网关(SGW和PGW)发送改变承载响应消息给RN-MME。Step 908: the gateway (SGW and PGW) of the RN sends a change bearer response message to the RN-MME.

消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：The message contains existing information regarding the RN as UE. The existing information of the RN as UE includes:

-RN的标识。可以是RN-MME为RN分配的临时标识，例如P-TMSI。- identification of RN. It may be a temporary identifier assigned to the RN by the RN-MME, such as P-TMSI.

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new eNB UE S1AP ID。-Identification of the new S1 interface of the RN between the T-DeNB and the RN-MME: new eNB UE S1AP ID.

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

消息还包含RN服务的UE的信息，所述UE的信息包含：The message also includes the information of the UE served by the RN, and the information of the UE includes:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID。-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID.

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

至此，T-DeNB与RN-GW间的上行和下行隧道信息已经传输完毕，可以进行隧道建立。So far, the uplink and downlink tunnel information between the T-DeNB and the RN-GW has been transmitted, and the tunnel can be established.

步骤909：RN-MME发送路径切换确认消息给T-DeNB。消息包含RN的信息和UE的标识，承载信息。所述RN当成UE的现有信息包含：Step 909: RN-MME sends a path switching confirmation message to T-DeNB. The message includes RN information, UE identity, and bearer information. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new eNB UE S1AP ID，new MME UE S1 AP ID。-Identification of the new S1 interface of the RN between the T-DeNB and the RN-MME: new eNB UE S1AP ID, new MME UE S1 AP ID.

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

所述UE的信息包含：The UE information includes:

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID。-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID.

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

步骤910：RN-MME发送UE上下文释放命令消息给S-DeNB，释放S-DeNB上面保存的跟RN有关系的上下文信息。消息包含UE的标识和释放的原因。或者包含RN的标识，收到该标识，S-DeNB把RN的信息和RN上面服务的UE的信息一并删除。Step 910: RN-MME sends a UE context release command message to S-DeNB to release context information related to RN stored on S-DeNB. The message contains the identity of the UE and the reason for the release. Or it includes the identity of the RN. After receiving the identity, the S-DeNB deletes the information of the RN and the information of the UE served by the RN together.

步骤911：S-DeNB发送UE上下文释放完成消息给RN-MME。Step 911: S-DeNB sends UE context release complete message to RN-MME.

步骤912：RN和T-DeNB之间要建立S1接口。切换后，T-DeNB成为了RN的新的DeNB，为了描述方便，仍然把它成做T-DeNB。RN发送S1建立请求消息给T-DeNB。消息包含RN的基站标识，RN支持的TAI。消息还包含RN上面UE的信息，UE的信息包含下列信息，(可以是一个或者多个或者所有)：Step 912: An S1 interface needs to be established between the RN and the T-DeNB. After the handover, the T-DeNB becomes the new DeNB of the RN, and for convenience of description, it is still referred to as the T-DeNB. RN sends S1 establishment request message to T-DeNB. The message includes the base station identifier of the RN and the TAI supported by the RN. The message also includes the information of the UE on the RN, and the information of the UE includes the following information (can be one or more or all):

-UE在RN和S-DeNB之间的旧的S1接口标识：eNB UE S1 AP ID。- The old S1 interface identifier of UE between RN and S-DeNB: eNB UE S1 AP ID.

-UE服务的GUMMEI信息。- GUMMEI information of UE service.

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：new MME UES1 AP ID，new eNB UE S1 AP ID。-Identification of the UE's old S1 interface between S-DeNB and UE-MME: new MME UES1 AP ID, new eNB UE S1 AP ID.

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information.

-其他信息，例如，UE的历史信息，根据激活信息。- Other information, eg UE's history information, according to the activation information.

RN上面UE的信息也可以在S1建立后，通过单独的消息发送给T-DeNB。The UE information on the RN can also be sent to the T-DeNB through a separate message after S1 is established.

步骤913：T-DeNB发送S1建立响应消息，消息包含T-DeNB作为MME应该传输给RN的信息：Step 913: T-DeNB sends an S1 establishment response message, which contains the information that T-DeNB as MME should transmit to RN:

-Served GUMMEI信息列表，GUMMEI信息包含PLMN标识，MME组标识，MME码。-Served GUMMEI information list, GUMMEI information includes PLMN identification, MME group identification, MME code.

-MME支持RN的指示。- Indication that the MME supports the RN.

-MME的容量信息。- Capacity information of the MME.

S1建立响应消息还包含跟RN上面的UE有关的信息，包含The S1 establishment response message also includes information related to the UE on the RN, including

-UE在RN和T-DeNB之间的新的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID。-Identification of the UE's new S1 interface between RN and T-DeNB: eNB UE S1 AP ID, MME UE S1 AP ID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的上行的TEID和传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID and transport layer address allocated by T-DeNB.

至此，S1接口建立完成，并在该接口建立过程中，实现了RN与T-DeNB间的隧道信息传输。接下来，更新UE-MME和RN-GW上的UE标识。So far, the establishment of the S1 interface is completed, and during the establishment process of the interface, the tunnel information transmission between the RN and the T-DeNB is realized. Next, update UE identities on UE-MME and RN-GW.

步骤914：T-DeNB找到UE的服务MME，发送消息去更新服务MME上保存的UE的信息，消息包含Step 914: T-DeNB finds the serving MME of the UE, and sends a message to update the information of the UE stored on the serving MME, the message includes

-UE在S-DeNB和MME之间的S1接口的旧标识，eNB UE S1 AP ID，MME UE S1 AP ID。- The old identity of UE's S1 interface between S-DeNB and MME, eNB UE S1 AP ID, MME UE S1 AP ID.

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID。- The new identity of the UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID.

步骤915：UE-MME发送改变承载请求消息给RN的网关，消息包含：Step 915: UE-MME sends a change bearer request message to the gateway of the RN, the message includes:

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE在SeNB和UE-MME之间的旧的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID。-Identification of UE's old S1 interface between SeNB and UE-MME: eNB UE S1 AP ID, MME UE S1 AP ID.

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID，new MME UE S1 AP ID。- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

步骤916：RN的网关发送改变承载响应消息给UE-MME，消息包含：Step 916: The gateway of the RN sends a change bearer response message to the UE-MME, and the message includes:

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID，new MME UE S1 AP ID。- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-UE的标识，例如UE的临时标识P-TMSI。- The identity of the UE, such as the temporary identity P-TMSI of the UE.

步骤917：UE-MME发送响应消息给T-DeNB。消息包含Step 917: UE-MME sends a response message to T-DeNB. message contains

-UE在T-DeNB和MME之间的新的S1接口的标识，new eNB UE S1 APID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-加密信息。- Encrypted information.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

与实施例一类似地，在上述流程中，相应信息中包含UE的S1接口旧标识(MME UE S1 AP ID，eNB UE S1 AP ID)、UE在S-DeNB上的旧标识(oldeNB UE X2 AP ID)和/或UE的唯一标识(例如UE的临时标识)，将其统称为UE标识，其作用在于识别相应的UE，具体实现时，可以在相应消息中包含上述几种标识之一或任意组合，但一般地，在实体间传输的UE标识应当是一致的。Similar toEmbodiment 1, in the above process, the corresponding information includes the old identity of the UE's S1 interface (MME UE S1 AP ID, eNB UE S1 AP ID), the old identity of the UE on the S-DeNB (oldeNB UE X2 AP ID) and/or the unique identifier of the UE (such as the temporary identifier of the UE), which are collectively referred to as the UE identifier, and its function is to identify the corresponding UE. In specific implementation, one of the above identifiers or any of the above identifiers can be included in the corresponding message combinations, but in general, the UE identity transmitted between entities should be consistent.

实施例四Embodiment four

图10是RN通过X2接口切换到目的DeNB的流程图。RN的S/P GW没有改变。在RN切换的过程后，要为UE建立起来RN的S/PGW和T-DeNB之间的用于传输数据的隧道。下面是对图10的具体说明：Fig. 10 is a flow chart of the RN handing over to the target DeNB through the X2 interface. RN's S/PGW has not changed. After the RN handover process, a tunnel for transmitting data between the S/PGW of the RN and the T-DeNB shall be established for the UE. The following is a specific description of Figure 10:

步骤1001：RN对周围的无线环境进行测量，并且把测量报告发送给服务的DeNB(图中的S-DeNB)。根据测量汇报，DeNB决定把RN切换到信号质量更好的目的DeNB(图中的T-DeNB)，S-DeNB和T-DeNB之间已经建立的X2接口，S-DeNB发起X2切换。Step 1001: RN measures the surrounding wireless environment, and sends the measurement report to the serving DeNB (S-DeNB in the figure). According to the measurement report, the DeNB decides to switch the RN to the target DeNB with better signal quality (T-DeNB in the figure), the X2 interface has been established between the S-DeNB and the T-DeNB, and the S-DeNB initiates the X2 handover.

步骤1002：S-DeNB发送切换请求消息给T-DeNB，所述切换需求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 1002: S-DeNB sends a handover request message to T-DeNB, and the handover request message includes the existing information regarding RN as UE. The existing information of the RN as UE includes:

-RN在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- RN's old UE identity on S-DeNB: old eNB UE X2 AP ID;

-切换原因。- Reason for switching.

-切换的目的地址，此处切换目的小区的标识。- handover destination address, where the identity of the handover destination cell.

-MME的标识GUMMEI。- the identifier GUMMEI of the MME.

-RRC上下文-RRC context

-要建立的E-RAB的信息，例如E-RAB标识，RN-PGW分配的上行的TEID和传输层地址，Qos信息。- Information about the E-RAB to be established, such as the E-RAB identifier, the uplink TEID and transport layer address allocated by the RN-PGW, and Qos information.

所述消息还包含RN服务的UE的信息。RN服务的UE的一些信息需要在切换过程中切换到目的DeNB，可以包含多个UE的信息，每个UE的信息包含：The message also includes information about the UE served by the RN. Some information of the UE served by the RN needs to be handed over to the target DeNB during the handover process, which can contain information of multiple UEs, and the information of each UE includes:

-UE在S-DeNB和UE-MME之间的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID；-Identification of UE's S1 interface between S-DeNB and UE-MME: eNB UE S1 AP ID, MME UE S1 AP ID;

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息。- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information.

步骤1003：T-DeNB发送切换消息给S-DeNB，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 1003: T-DeNB sends a handover message to S-DeNB, and the message includes the existing information regarding RN as UE. The existing information of the RN as UE includes:

-RN在T-DeNB的新的标识：new eNB UE X2 AP ID。-New identification of RN in T-DeNB: new eNB UE X2 AP ID.

-RN在S-DeNB上面的旧的UE标识：old eNB UE X2 AP ID；- RN's old UE identity on S-DeNB: old eNB UE X2 AP ID;

-接受的E-RAB信息，包含E-RAB标识。- Accepted E-RAB information, including E-RAB identification.

-目的到源的透明传输的容器。- Container for transparent transfer from destination to source.

上述步骤中，在T-DeNB与RN-GW间传输了RN的隧道信息，但是没有传输UE的隧道信息，UE的隧道信息将在切换完成后进行传输。In the above steps, the tunnel information of the RN is transmitted between the T-DeNB and the RN-GW, but the tunnel information of the UE is not transmitted, and the tunnel information of the UE will be transmitted after the handover is completed.

步骤1004：S-DeNB发送RRC消息切换命令给RN，让RN切换到目的DeNB上面的目的小区。消息给目前的RRC消息一样，在此省略。Step 1004: S-DeNB sends an RRC message handover command to RN, so that RN is handed over to the target cell above the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤1005：RN跟目的小区同步，发送上行RRC消息切换完成给目DeNB。消息给目前的RRC消息一样，在此省略。Step 1005: RN synchronizes with the target cell, and sends an uplink RRC message handover complete to the target DeNB. The message is the same as the current RRC message and is omitted here.

步骤1006：目的DeNB发送路径切换请求消息给RN-MME，消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 1006: The target DeNB sends a path switching request message to the RN-MME, and the message includes the existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN在T-DeNB和RN-MME之间的新的S1接口的标识：new eNB UE S1AP ID-Identification of RN's new S1 interface between T-DeNB and RN-MME: new eNB UE S1AP ID

-RN在S-DeNB和RN-MME之间的新的S1接口的标识：new MME UES1 AP ID-Identification of RN's new S1 interface between S-DeNB and RN-MME: new MME UES1 AP ID

-切换的E-RAB信息。例如E-RAB标识，T-DeNB分配的下行的TEID和传输层地址。- Toggle E-RAB information. For example, the E-RAB identifier, the downlink TEID and the transport layer address assigned by the T-DeNB.

-目的小区标识。- Target cell identity.

-目的TAI。- Purpose TAI.

步骤1007：RN-MME发送改变承载请求消息给RN的网关(SGW和PGW)。改变承载请求消息包含把RN当成UE的现有信息。所述RN当成UE的现有信息包含：Step 1007: RN-MME sends a change bearer request message to the gateways (SGW and PGW) of the RN. The Change Bearer Request message contains existing information regarding the RN as the UE. The existing information of the RN as UE includes:

-RN的标识。可以是RN-MME为RN分配的临时标识，例如P-TMSI。- identification of RN. It may be a temporary identifier assigned to the RN by the RN-MME, such as P-TMSI.

-RN的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- RN's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

步骤1008：RN的网关(SGW和PGW)发送改变承载响应消息给RN-MME。Step 1008: The gateway (SGW and PGW) of the RN sends a change bearer response message to the RN-MME.

步骤1009：RN-MME发送UE上下文释放命令消息给S-DeNB，释放S-DeNB上面保存的跟RN有关系的上下文信息。消息包含UE的标识和释放的原因。Step 1009: RN-MME sends a UE context release command message to S-DeNB to release context information related to RN stored on S-DeNB. The message contains the identity of the UE and the reason for the release.

步骤1010：S-DeNB发送UE上下文释放完成消息给RN-MME。Step 1010: S-DeNB sends UE context release complete message to RN-MME.

步骤1011：RN和T-DeNB之间要建立S1接口。切换后，T-DeNB成为了RN的新的DeNB，为了描述方便，仍然把它成做T-DeNB。RN发送S1建立请求消息给T-DeNB。消息包含RN的基站标识，RN支持的TAI。消息还包含RN上面UE的信息，UE的信息包含下列信息：Step 1011: S1 interface should be established between RN and T-DeNB. After the handover, the T-DeNB becomes the new DeNB of the RN, and for convenience of description, it is still referred to as the T-DeNB. RN sends S1 establishment request message to T-DeNB. The message includes the base station identifier of the RN and the TAI supported by the RN. The message also contains the information of the UE on the RN, and the information of the UE includes the following information:

-UE在RN和S-DeNB之间的旧的S1接口标识：eNB UE S1 AP ID。- The old S1 interface identifier of UE between RN and S-DeNB: eNB UE S1 AP ID.

-UE服务的GUMMEI信息。- GUMMEI information of UE service.

-UE在S-DeNB和UE-MME之间的旧的S1接口的标识：MME UE S1 APID，eNB UE S1 AP ID；-Identification of UE's old S1 interface between S-DeNB and UE-MME: MME UE S1 APID, eNB UE S1 AP ID;

-UE的上下文信息，比如UE的加密能力，接入层能力信息，UE在S1接口的最大速率，要建立的E-RAB信息；RRC上下文，切换限制列表，位置汇报信息，- UE context information, such as UE encryption capability, access layer capability information, maximum rate of UE on S1 interface, E-RAB information to be established; RRC context, handover restriction list, location report information,

-其他信息，例如，UE的历史信息，根据激活信息。- Other information, eg UE's history information, according to the activation information.

RN上面UE的信息也可以在S1建立后，通过单独的消息发送给T-DeNB。The UE information on the RN can also be sent to the T-DeNB through a separate message after S1 is established.

步骤1012：T-DeNB发送S1建立响应消息，消息包含T-DeNB作为MME应该传输给RN的信息：Step 1012: T-DeNB sends S1 establishment response message, the message contains the information that T-DeNB as MME should transmit to RN:

-Served GUMMEI信息列表，GUMMEI信息包含PLMN标识，MME组标识，MME码。-Served GUMMEI information list, GUMMEI information includes PLMN identification, MME group identification, MME code.

-MME支持RN的指示。- Indication that the MME supports the RN.

-MME的容量信息。- Capacity information of the MME.

S1建立响应消息还包含跟RN上面的UE有关的信息，包含The S1 establishment response message also includes information related to the UE on the RN, including

-UE在RN和T-DeNB之间的新的S1接口的标识：new eNB UE S1 AP ID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between RN and T-DeNB: new eNB UE S1 AP ID, new MME UE S1 AP ID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的上行的TEID和传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID and transport layer address allocated by T-DeNB.

至此，S1接口建立完成，并在该接口建立过程中，实现了RN与T-DeNB间的隧道信息传输。So far, the establishment of the S1 interface is completed, and during the establishment process of the interface, the tunnel information transmission between the RN and the T-DeNB is realized.

步骤1013：T-DeNB找到UE的服务MME，发送消息去更新服务MME上保存的UE的信息，消息包含Step 1013: T-DeNB finds the serving MME of the UE, and sends a message to update the information of the UE stored on the serving MME, the message includes

-UE在S-DeNB和MME之间的S1接口的旧标识，eNB UE S1 AP ID，MME UE S1 AP ID。(可以只包含MME UE S1 AP ID)。- The old identity of UE's S1 interface between S-DeNB and MME, eNB UE S1 AP ID, MME UE S1 AP ID. (It can only contain MME UE S1 AP ID).

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID。- The new identity of the UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNb分配下行的TEID，传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, T-DeNb allocated downlink TEID, and transport layer address.

步骤1014：UE-MME发送改变承载请求消息给RN的网关，消息包含(可以是一个或者多个或者所有)：Step 1014: UE-MME sends a change bearer request message to the gateway of RN, the message includes (can be one or more or all):

-UE的标识，例如UE的临时标识S-TMSI。- The identity of the UE, such as the temporary identity S-TMSI of the UE.

-UE在SeNB和UE-MME之间的旧的S1接口的标识：eNB UE S1 AP ID，MME UE S1 AP ID。-Identification of UE's old S1 interface between SeNB and UE-MME: eNB UE S1 AP ID, MME UE S1 AP ID.

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID，new MME UE S1 AP ID。- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，T-DeNB分配的下行的TEID，传输层地址。- UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, downlink TEID assigned by T-DeNB, and transport layer address.

步骤1015：RN的网关发送改变承载响应消息给UE-MME，消息包含：Step 1015: The gateway of the RN sends a change bearer response message to the UE-MME, and the message includes:

-UE在T-DeNB和MME之间的S1接口的新标识，new eNB UE S1 APID，new MME UE S1 AP ID。- The new identity of UE's S1 interface between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-UE的标识，例如UE的临时标识P-TMSI。- The identity of the UE, such as the temporary identity P-TMSI of the UE.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

步骤1016：UE-MME发送响应消息给T-DeNB。消息包含Step 1016: UE-MME sends a response message to T-DeNB. message contains

-UE在T-DeNB和MME之间的新的S1接口的标识，new eNB UE S1 APID，new MME UE S1 AP ID。-Identification of the new S1 interface of UE between T-DeNB and MME, new eNB UE S1 APID, new MME UE S1 AP ID.

-加密信息。- Encrypted information.

-UE的E-RAB信息列表，包含E-RAB信息，例如E-RAB标识，RN GW分配的上行的TEID，传输层地址。-UE's E-RAB information list, including E-RAB information, such as E-RAB identifier, uplink TEID allocated by RN GW, and transport layer address.

上述步骤1013-1016，实现了T-DeNB与RN-GW间UE隧道信息的传输，至此，即可以建立起T-DeNB与RN-GW间的隧道，用于传输UE的数据。The above steps 1013-1016 realize the transmission of UE tunnel information between T-DeNB and RN-GW, so far, the tunnel between T-DeNB and RN-GW can be established for transmitting UE data.

与实施例三类似地，在上述流程中，相应信息中包含UE的S1接口旧标识(MME UE S1 AP ID，eNB UE S1 AP ID)、UE在S-DeNB上的旧标识(oldeNB UE X2 AP ID)和/或UE的唯一标识(例如UE的临时标识)，将其统称为UE标识，其作用在于识别相应的UE，具体实现时，可以在相应消息中包含上述几种标识之一或任意组合，但一般地，在实体间传输的UE标识应当是一致的。Similar toEmbodiment 3, in the above process, the corresponding information includes the old identity of the UE's S1 interface (MME UE S1 AP ID, eNB UE S1 AP ID), the old identity of the UE on the S-DeNB (oldeNB UE X2 AP ID) and/or the unique identifier of the UE (such as the temporary identifier of the UE), which are collectively referred to as the UE identifier, and its function is to identify the corresponding UE. In specific implementation, one of the above identifiers or any of the above identifiers can be included in the corresponding message combinations, but in general, the UE identity transmitted between entities should be consistent.

通过上述本发明的方法，能够在移动RN的切换过程中或切换完成后，实现T-DeNB与RN-GW间的UE隧道建立，用于传输UE的信息；同时，实现了在S1建立的同时，传输RN与T-DeNB间的隧道信息。在上述流程中，RN与UE间的承载信息始终没有变化，因此，即使RN进行了移动和切换，但是对于UE而言，该切换过程是透明的，并能够保证数据的连续传输。Through the above-mentioned method of the present invention, during the handover process of the mobile RN or after the handover is completed, the UE tunnel establishment between the T-DeNB and the RN-GW can be realized for transmitting UE information; , to transmit tunnel information between the RN and the T-DeNB. In the above procedure, the bearer information between the RN and the UE remains unchanged. Therefore, even if the RN moves and switches, the switching process is transparent to the UE and can ensure continuous data transmission.

以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (18)

Translated fromChinese

1.一种移动中继的DeNB与移动中继的网关间的隧道建立方法，其特征在于，在所述移动中继(RN)通过S1接口切换到新的DeNB时，该方法包括：1. A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, wherein when the mobile relay (RN) is switched to a new DeNB through the S1 interface, the method comprises:A、所述移动RN的源DeNB向服务RN的移动管理实体(RN-MME)发送切换需要消息，该消息中包含所述移动RN服务的每个UE的标识和移动RN的网关(RN-GW)为该UE分配的上行隧道信息；A. The source DeNB of the mobile RN sends a handover requirement message to the mobility management entity (RN-MME) of the serving RN, which contains the identity of each UE served by the mobile RN and the gateway (RN-GW) of the mobile RN ) the uplink tunnel information allocated for the UE;B、所述RN-MME向所述移动RN的目的DeNB发送切换请求消息，该消息中包含所述移动RN服务的每个UE的标识和RN-GW为相应UE分配的上行隧道信息；B. The RN-MME sends a handover request message to the target DeNB of the mobile RN, and the message includes the identity of each UE served by the mobile RN and the uplink tunnel information allocated by the RN-GW for the corresponding UE;C、所述目的DeNB向所述RN-MME发送切换响应消息，该消息包含：目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息；C. The target DeNB sends a handover response message to the RN-MME, and the message includes: the new S1 interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN;D、所述RN-MME或目的DeNB向所述RN-GW发送目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息。D. The RN-MME or the target DeNB sends to the RN-GW the new S1 interface identifier and downlink tunnel information allocated by the target DeNB for each UE served by the mobile RN.2.根据权利要求1所述的方法，其特征在于，所述步骤D为：所述RN-MME向所述RN-GW发送改变承载建立请求，该消息中包含所述目的DeNB为所述移动RN服务的每个UE分配的S1接口新标识和下行隧道信息；2. The method according to claim 1, wherein the step D is: the RN-MME sends a change bearer establishment request to the RN-GW, and the message includes that the target DeNB is the mobile The new S1 interface identifier and downlink tunnel information assigned by each UE served by the RN;或者，or,所述目的DeNB向所述RN-GW发送路径更新消息，该消息中包含所述目的DeNB为RN服务的每个UE分配的S1接口新标识和下行隧道信息。The target DeNB sends a path update message to the RN-GW, and the message includes the new S1 interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the RN.3.根据权利要求1所述的方法，其特征在于，在所述步骤D后，该方法进一步包括包括步骤E：所述RN-MME向所述源DeNB发送UE上下文释放命令消息，该消息中包含所述移动RN服务的所有UE的标识，所述源DeNB接收所述UE上下文释放命令消息后，释放所述移动RN的上下文信息和所述移动RN服务的所有UE的上下文信息。3. The method according to claim 1, characterized in that, after the step D, the method further comprises step E: the RN-MME sends a UE context release command message to the source DeNB, in which Including the identifiers of all UEs served by the mobile RN, the source DeNB releases the context information of the mobile RN and the context information of all UEs served by the mobile RN after receiving the UE context release command message.4.根据权利要求3所述的方法，其特征在于，在所述步骤E后，该方法进一步包括：在所述移动RN与目的DeNB间建立S1接口，并保持所述移动RN服务的所有UE的上下文信息不变。4. The method according to claim 3, characterized in that, after the step E, the method further comprises: establishing an S1 interface between the mobile RN and the target DeNB, and maintaining all UEs served by the mobile RN The context information remains unchanged.5.根据权利要求1所述的方法，其特征在于，在所述S1切换完成后，该方法进一步包括：5. The method according to claim 1, characterized in that, after the S1 handover is completed, the method further comprises:对于所述移动RN服务的每个UE，所述目的DeNB将相应UE的标识和目的DeNB为相应UE分配的S1接口新标识发送给服务于相应UE的(UE-MME)，用于更新该UE-MME上的UE信息；所述UE-MME为相应UE分配S1接口新标识，并通知所述目的DeNB；For each UE served by the mobile RN, the target DeNB sends the identity of the corresponding UE and the new identity of the S1 interface allocated by the target DeNB to the corresponding UE (UE-MME) to update the UE - UE information on the MME; the UE-MME allocates a new S1 interface identifier for the corresponding UE, and notifies the target DeNB;所述UE-MME或目的DeNB向所述RN-GW发送UE-MME为移动RN服务的每个UE分配的S1接口新标识。The UE-MME or the target DeNB sends to the RN-GW the new identity of the S1 interface allocated by the UE-MME for each UE served by the mobile RN.6.根据权利要求1到5中任一所述的方法，其特征在于，步骤A的所述切换需要消息中还包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB和RN-MME间的S1接口旧标识；6. The method according to any one of claims 1 to 5, wherein the handover requirement message in step A further includes the information that the mobile RN is a UE, which includes information that the mobile RN is in the source DeNB and The old identifier of the S1 interface between RN-MME;步骤B的所述切换请求消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message in step B also includes the new S1 interface identifier allocated by the RN-MME for the mobile RN and the uplink tunnel information allocated by the RN-GW for the mobile RN;步骤C中的所述切换响应消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识、目的DeNB为所述移动RN分配的S1接口新标识和下行隧道信息；The handover response message in step C also includes the new identifier of the S1 interface assigned by the RN-MME to the mobile RN, the new identifier of the S1 interface assigned by the target DeNB to the mobile RN, and downlink tunnel information;在步骤C后、步骤D前进一步包括：所述RN-MME向所述源DeNB发送切换命令信息，该消息中包含移动RN分配的S1接口新标识、目的DeNB为所述移动RN分配的S1接口新标识；After step C and before step D, it further includes: the RN-MME sends handover command information to the source DeNB, and the message includes the new identifier of the S1 interface allocated by the mobile RN, and the S1 interface allocated by the target DeNB to the mobile RN new logo;步骤D中进一步包括：所述RN-MME向所述RN-GW发送目的DeNB为所述移动RN分配的下行隧道信息。Step D further includes: the RN-MME sending the downlink tunnel information allocated by the target DeNB to the mobile RN to the RN-GW.7.一种移动中继的DeNB与移动中继网关间的隧道建立方法，其特征在于，在所述移动中继(RN)通过X2接口切换到新的DeNB时，该方法包括：7. A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, characterized in that, when the mobile relay (RN) is switched to a new DeNB through the X2 interface, the method comprises:A、所述移动RN的源DeNB向目的DeNB发送切换请求消息，该消息中包含所述移动RN服务的每个UE的标识和移动RN的网关(RN-GW)为该UE分配的上行隧道信息；A. The source DeNB of the mobile RN sends a handover request message to the target DeNB, and the message contains the identity of each UE served by the mobile RN and the uplink tunnel information allocated by the gateway (RN-GW) of the mobile RN for the UE ;B、目的DeNB向源DeNB发送切换响应消息，该消息中包含目的DeNB为移动RN服务的每个UE分配的新标识和下行隧道信息；B. The target DeNB sends a handover response message to the source DeNB, which contains the new identity and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN;C、所述目的DeNB通过服务RN的移动管理实体(RN-MME)向RN-GW转发目的DeNB为移动RN服务的每个UE分配的SI接口新标识和下行隧道信息。C. The target DeNB forwards the new SI interface identifier and downlink tunnel information allocated by the target DeNB to each UE served by the mobile RN to the RN-GW through the mobility management entity (RN-MME) of the serving RN.8.根据权利要求7所述的方法，其特征在于，在所述步骤C后，该方法进一步包括包括步骤D：所述RN-MME向所述源DeNB发送UE上下文释放命令消息，该消息中包含所述移动RN服务的所有UE的标识，所述源DeNB接收所述UE上下文释放命令消息后，释放所述移动RN的上下文信息和所述移动RN服务的所有UE的上下文信息。8. The method according to claim 7, characterized in that, after the step C, the method further comprises step D: the RN-MME sends a UE context release command message to the source DeNB, in which Including the identifiers of all UEs served by the mobile RN, the source DeNB releases the context information of the mobile RN and the context information of all UEs served by the mobile RN after receiving the UE context release command message.9.根据权利要求8所述的方法，其特征在于，在所述步骤D后，该方法进一步包括：在所述移动RN与目的DeNB间建立S1接口，并保持所述移动RN服务的所有UE的上下文信息不变。9. The method according to claim 8, characterized in that, after the step D, the method further comprises: establishing an S1 interface between the mobile RN and the target DeNB, and maintaining all UEs served by the mobile RN The context information remains unchanged.10.根据权利要求1所述的方法，其特征在于，在所述X2切换完成后，该方法进一步包括：10. The method according to claim 1, characterized in that, after the X2 handover is completed, the method further comprises:对于所述移动RN服务的每个UE，所述目的DeNB将相应UE的标识和目的DeNB为相应UE分配的S1接口新标识发送给服务于该UE的(UE-MME)，用于更新所述UE-MME中保存的相应UE的信息；For each UE served by the mobile RN, the target DeNB sends the identity of the corresponding UE and the new identity of the S1 interface allocated by the target DeNB to the (UE-MME) serving the UE to update the The information of the corresponding UE stored in the UE-MME;所述UE-MME向RN-GW发送相应UE的标识、目的DeNB为相应UE分配的S1接口新标识、UE-MME为相应UE分配的S1接口新标识，用于更新所述RN-GW中保存的相应UE的信息；The UE-MME sends to the RN-GW the identity of the corresponding UE, the new identity of the S1 interface allocated by the target DeNB for the corresponding UE, and the new identity of the S1 interface allocated by the UE-MME for the corresponding UE, for updating the information about the corresponding UE;所述UE-MME向目的DeNB发送UE-MME为相应UE分配的S1接口新标识。The UE-MME sends the new identity of the S1 interface assigned by the UE-MME to the corresponding UE to the target DeNB.11.根据权利要求7到10中任一所述的方法，其特征在于，步骤A的切换请求消息中还包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB上的旧标识和RN-GW为所述移动RN分配的上行隧道信息；11. The method according to any one of claims 7 to 10, wherein the handover request message in step A further includes the information that the mobile RN is a UE, including the old information of the mobile RN on the source DeNB Identification and uplink tunnel information allocated by RN-GW for the mobile RN;步骤B的切换响应消息中还包含所述移动RN在源DeNB上的旧标识、所述移动RN在目的DeNB上的新标识和目的DeNB为移动RN分配的下行隧道信息；The handover response message in step B also includes the old identity of the mobile RN on the source DeNB, the new identity of the mobile RN on the target DeNB, and the downlink tunnel information allocated by the target DeNB to the mobile RN;步骤C中所述目的DeNB通过RN-MME向RN-GW转发UE信息时，一并通过RN-MME向RN-GW转发目的DeNB为所述移动RN分配的下行隧道信息，并向RN-MME发送所述移动RN在目的DeNB上的新标识。When the target DeNB in step C forwards the UE information to the RN-GW through the RN-MME, the downlink tunnel information allocated by the target DeNB for the mobile RN is also forwarded to the RN-GW through the RN-MME, and sent to the RN-MME The new identity of the mobile RN on the target DeNB.12.一种移动中继的DeNB与移动中继间的隧道建立方法，其特征在于，在所述移动中继(RN)切换到新的DeNB后，该方法包括：12. A method for establishing a tunnel between a mobile relay DeNB and a mobile relay, characterized in that, after the mobile relay (RN) is handed over to a new DeNB, the method comprises:A、所述移动RN向所述DeNB发送S1建立请求消息，该消息中包含切换时DeNB为所述每个UE分配的S1接口新标识、所述每个UE的当前上下文信息；A. The mobile RN sends an S1 establishment request message to the DeNB, and the message includes the new S1 interface identifier assigned by the DeNB to each UE during handover, and the current context information of each UE;B、所述DeNB向所述移动RN发送S1建立响应消息，该消息中包含所述DeNB为所述每个UE分配的S1接口新标识和上行隧道信息。B. The DeNB sends an S1 establishment response message to the mobile RN, and the message includes the new S1 interface identifier and uplink tunnel information allocated by the DeNB to each UE.13.根据权利要求12所述的方法，其特征在于，步骤A的所述S1建立请求消息中还包含所述移动RN的基站标识和支持的TAI文信息；13. The method according to claim 12, wherein the S1 establishment request message in step A also includes the base station identification and supported TAI text information of the mobile RN;步骤B的所述S1建立响应消息中包含目的DeNB为所述每个UE分配的S1接口新标识和上行隧道信息。The S1 establishment response message in step B includes the new S1 interface identifier and uplink tunnel information allocated by the target DeNB for each UE.14.一种移动中继的DeNB与移动中继网关间的隧道建立方法，其特征在于，在所述移动中继(RN)切换到新的DeNB后，该方法包括：14. A method for establishing a tunnel between a mobile relay DeNB and a mobile relay gateway, characterized in that, after the mobile relay (RN) is handed over to a new DeNB, the method comprises:A、所述DeNB通过UE的MME(UE-MME)向所述移动RN的网关(RN-GW)发送切换时所述DeNB为所述UE分配的S1接口新标识和下行隧道信息；所述UE为所述移动RN服务的每个UE；A. The DeNB sends the new S1 interface identifier and downlink tunnel information assigned by the DeNB to the UE during the handover to the mobile RN gateway (RN-GW) through the UE's MME (UE-MME); the UE each UE served by the mobile RN;B、所述RN-GW通过所述UE-MME向所述DeNB发送RN-GW为UE分配的上行隧道信息。B. The RN-GW sends the uplink tunnel information allocated by the RN-GW to the UE to the DeNB through the UE-MME.15.根据权利要求14所述的方法，其特征在于，所述步骤A为：所述DeNB向所述UE-MME发送路径切换请求消息，所述UE-MME向所述RN-GW发送改变承载请求消息，所述路径切换请求消息和改变承载请求消息中包含所述DeNB为相应UE分配的S1接口新标识和下行隧道信息；15. The method according to claim 14, wherein the step A is: the DeNB sends a path switching request message to the UE-MME, and the UE-MME sends a change bearer message to the RN-GW request message, the path switch request message and bearer change request message include the new S1 interface identifier and downlink tunnel information allocated by the DeNB for the corresponding UE;所述步骤B为：所述RN-GW向所述UE-MME发送改变承载响应消息，所述UE-MME向所述DeNB发送路径切换请求确认消息，在所述改变承载响应消息和路径切换请求确认消息中包含RN-GW为相应UE分配的上行隧道信息。The step B is: the RN-GW sends a change bearer response message to the UE-MME, the UE-MME sends a path switch request confirmation message to the DeNB, and the change bearer response message and the path switch request The confirmation message includes the uplink tunnel information allocated by the RN-GW for the corresponding UE.16.根据权利要求15所述的方法，其特征在于，在步骤A的所述改变承载请求消息中还包含所述UE-MME为相应UE分配的S1接口新标识；16. The method according to claim 15, wherein the change bearer request message in step A further includes the new S1 interface identifier assigned by the UE-MME to the corresponding UE;在步骤B的所述路径切换请求确认消息中还包含所述UE-MME为相应UE分配的S1接口新标识。The path switching request acknowledgment message in step B also includes the new S1 interface identifier assigned by the UE-MME to the corresponding UE.17.根据权利要求14、15或16所述的方法，其特征在于，当所述移动RN通过S1切换到所述DeNB上时，在所述S1切换完成前，该方法进一步包括：17. The method according to claim 14, 15 or 16, wherein when the mobile RN is handed over to the DeNB through S1, before the S1 handover is completed, the method further comprises:在切换的源DeNB发给服务所述移动RN的移动管理实体(RN-MME)的切换需要消息中包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB和RN-MME间的S1接口旧标识；The handover requirement message sent by the handover source DeNB to the mobility management entity (RN-MME) serving the mobile RN contains the information that the mobile RN is a UE, which includes the information that the mobile RN is between the source DeNB and the RN-MME The old identifier of the S1 interface;在所述RN-MME发送给所述DeNB的切换请求消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message sent by the RN-MME to the DeNB also includes the new S1 interface identifier allocated by the RN-MME for the mobile RN and the uplink tunnel information allocated by the RN-GW for the mobile RN;在所述DeNB发送给所述RN-MME的切换响应消息中还包含所述RN-MME为所述移动RN分配的S1接口新标识、所述DeNB为所述移动RN分配的S1接口新标识和下行隧道信息；The handover response message sent by the DeNB to the RN-MME also includes the new S1 interface identifier assigned by the RN-MME to the mobile RN, the new S1 interface identifier assigned by the DeNB to the mobile RN, and downlink tunnel information;在所述RN-MME发送给所述源DeNB的切换命令消息中包含移动RN分配的S1接口新标识、所述DeNB为所述移动RN分配的S1接口新标识；The handover command message sent by the RN-MME to the source DeNB includes the new identifier of the S1 interface assigned by the mobile RN, and the new identifier of the S1 interface assigned by the DeNB to the mobile RN;在所述RN-MME发送给所述RN-GW的改变承载请求消息中包含所述DeNB为所述移动RN分配的下行隧道信息。The change bearer request message sent by the RN-MME to the RN-GW includes the downlink tunnel information allocated by the DeNB for the mobile RN.18.根据权利要求14、15或16所述的方法，其特征在于，当所述移动RN通过X2切换到所述DeNB上时，在所述X2切换完成前，该方法进一步包括：18. The method according to claim 14, 15 or 16, wherein when the mobile RN is handed over to the DeNB through X2, before the X2 handover is completed, the method further comprises:在切换的源DeNB发送给所述DeNB的切换请求消息中包含所述移动RN作为UE的信息，其中包含所述移动RN在源DeNB上的旧标识和RN-GW为所述移动RN分配的上行隧道信息；The handover request message sent by the handover source DeNB to the DeNB contains the information of the mobile RN as a UE, including the old identity of the mobile RN on the source DeNB and the uplink allocated by the RN-GW for the mobile RN tunnel information;在所述DeNB发送给所述源DeNB的切换响应消息中包含所述移动RN在源DeNB上的旧标识、所述移动RN在所述DeNB上的新标识和所述DeNB接受的为移动RN分配的上行隧道信息；The handover response message sent by the DeNB to the source DeNB includes the old identity of the mobile RN on the source DeNB, the new identity of the mobile RN on the DeNB, and the mobile RN assigned by the DeNB uplink tunnel information;在所述DeNB发送给RN-MME的路径切换消息和所述RN-MME发送给所述RN-GW的改变承载请求消息中，包含所述DeNB为所述移动RN分配的下行隧道信息，并在所述路径切换消息中包含所述移动RN在所述DeNB上的新标识。In the path switching message sent by the DeNB to the RN-MME and the bearer change request message sent by the RN-MME to the RN-GW, the downlink tunnel information allocated by the DeNB to the mobile RN is included, and in The path switching message includes the new identity of the mobile RN on the DeNB.

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