WO2010127493A1

WO2010127493A1 - Method, base station and relay node for processing handover

Info

Publication number: WO2010127493A1
Application number: PCT/CN2009/071674
Authority: WO
Inventors: 常俊仁; 李亚娟; 张亮亮
Original assignee: 华为技术有限公司
Priority date: 2009-05-07
Filing date: 2009-05-07
Publication date: 2010-11-11
Also published as: CN102246555A; CN102246555B

Abstract

A method, base station and relay node for processing handover are provided by the embodiments of the present invention, relating to field of communications. In order to save radio resources during the handover procedure, the technical solution provided by the embodiment of the present invention includes: the elimination of the data packets of the user equipment in the cache is stopped, when a determination is made that the user equipment needs a handover, or at an appointed time after the determination; the receiving state information of the user equipment is acquired from the source relay node; the lost data packets are acquired from the source relay node according to the receiving state information, when the existence of the lost data packets is determined according to the receiving state information. The technical solution provided by the embodiment of the present invention can be applied to the communication systems handover.

Description

切换处理方法、基站及中继节点技术领域 Switching processing method, base station and relay node

本发明涉及通信领域，尤其涉及一种切换处理方法、基站及中继节点。背景技术 The present invention relates to the field of communications, and in particular, to a handover processing method, a base station, and a relay node. Background technique

在现有的 LTE ( Long Term Evolut ion, 长期演进） ***中，在切换过程中，可以通过至少以下两种方式处理下行数据包：对于 RLC ( Radio Link Contro l , 无线链路控制）确认模式，当前接入 UE ( User Equipment , 用户设备）的 eNB ( Evolved Node B, 演进基站）按序将所有未被 UE正确接收的下行数据包及其序号转发给待接入 UE的 eNB; 对于 RLC非确认模式，当前接入 UE的 eNB仅将未向 UE发送的下行数据包转发给待接入 UE的 eNB。另外，在切换过程中，对于 RLC确认模式或者 RLC非确认模式，当前接入 UE的 eNB均会将所有成功接收的上行数据包发送给 S-GW ( Serving Gateway服务网关）。 In the existing LTE (Long Term Evolution) system, in the handover process, the downlink data packet can be processed in at least the following two ways: For the RLC (Radio Link Contro l) confirmation mode, The eNB (Evolved Node B) that is currently accessing the UE (User Equipment) sequentially forwards all downlink packets and their sequence numbers that are not correctly received by the UE to the eNB to be accessed by the UE; In the mode, the eNB currently accessing the UE forwards only the downlink data packet that is not sent to the UE to the eNB of the UE to be accessed. In addition, during the handover process, for the RLC acknowledgement mode or the RLC unacknowledged mode, the eNBs currently accessing the UE will send all successfully received uplink data packets to the S-GW (Serving Gateway Service Gateway).

为了提高小区边缘用户的数据吞吐量，同时也为了扩大小区覆盖面积，在 LTE-A ( Long Term Evolut ion Advanced, 长期演进***的进一步增强）系统中引入了 RN ( Relay Node, 中继节点）。在所述引入了 RN的***中所采用的 ARQ ( Automat ic Repeat Reques t , 自动重传请求）机制主要分为两种：端对端机制、逐兆机制。采用端对端机制传输时， eNB緩存从 S-GW ( Serving Gateway, 服务网关）接收的数据包后，将该数据包发送给对应的 RN, 当该 eNB接收由该 RN转发的 UE反馈的确认信息，确认该数据包已经被 UE正确接收时，该 eNB才从緩存中清除该数据包。然而，由于 eNB要一直等到 UE上报的确认消息才清除緩存，因此，当 eNB服务多个 RN的时候， eNB占用的緩存过大。 In order to improve the data throughput of the cell edge users and to expand the cell coverage area, an RN (Relay Node) is introduced in the LTE-A (Long Term Evolution Advanced) system. The ARQ (Automatic Repeat Reques) mechanism used in the RN-introduced system is mainly divided into two types: end-to-end mechanism and mega-mechanism. When transmitting by using the end-to-end mechanism, after the eNB buffers the data packet received from the S-GW (Serving Gateway), the eNB sends the data packet to the corresponding RN, and the eNB receives the acknowledgement of the UE feedback forwarded by the RN. The information, when it is confirmed that the data packet has been correctly received by the UE, the eNB clears the data packet from the cache. However, since the eNB waits until the acknowledgment message reported by the UE clears the buffer, when the eNB serves multiple RNs, the eNB occupies a large cache.

为克服上述问题，一种逐跳机制的传输技术得到采用。在采用逐跳机制传输时， eNB緩存从 S-GW接收的数据包后，将该数据包发送给对应的 RN, 当该 eNB确认该数据包已经被该 RN正确接收时，该 eNB就从緩存中清除该数据包。因此， eNB不需要等 UE的反馈确认信息而占用过多的緩存。在实现本发明的过程中，发明人发现现有技术中至少存在如下问题：采用逐跳机制传输时，在 UE从一个 RN切换到该 RN的 eNB或其他的目标节点时，由于所述 eNB发往 RN的数据包可能已被 eNB清除， RN需要将 eNB发送的数据包回传给 eNB以防数据丟失，而这种回传过程会浪费 RN和 eNB之间的无线资源。 To overcome the above problems, a hop-by-hop transmission technique is adopted. When the eNB buffers the data packet received from the S-GW, the eNB buffers the data packet received by the S-GW, and sends the data packet to the corresponding RN. When the eNB confirms that the data packet has been correctly received by the RN, the eNB caches the data packet. Clear the data in Package. Therefore, the eNB does not need to wait for the feedback confirmation information of the UE to occupy too much buffer. In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: when the UE uses a hop-by-hop mechanism to transmit, when the UE switches from one RN to the eNB or other target node of the RN, The data packet to the RN may have been cleared by the eNB. The RN needs to transmit the data packet sent by the eNB back to the eNB to prevent data loss, and this backhaul process wastes the radio resource between the RN and the eNB.

发明内容 Summary of the invention

本发明的实施例提供一种切换处理方法、基站及中继节点，能够在切换过程中节约无线资源。 Embodiments of the present invention provide a handover processing method, a base station, and a relay node, which are capable of conserving radio resources during handover.

为达到上述目的，本发明的实施例采用如下技术方案： In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

一种切换处理方法，包括： A switching processing method includes:

在确定用户设备需要切换时，或在确定所述用户设备需要切换后的指定时刻，停止清除緩存中所述用户设备的数据包； When it is determined that the user equipment needs to be switched, or after determining that the user equipment needs to be switched, the data packet of the user equipment in the cache is stopped.

从所述源中继节点获取所述用户设备的接收状态信息； Obtaining, by the source relay node, the receiving status information of the user equipment;

在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取所述丟失的数据包。 When it is determined that there is a lost data packet according to the reception status information, the lost data packet is acquired from the source relay node according to the reception status information.

一种基站，包括： A base station comprising:

切换确定单元，用于确定用户设备是否需要切换； a handover determining unit, configured to determine whether the user equipment needs to be switched;

停止清除单元，用于在所述切换确定单元确定所述用户设备需要切换时，或在所述切换确定单元确定所述用户设备需要切换后的指定时刻，停止清除緩存中所述用户设备的数据包； a stop clearing unit, configured to stop clearing data of the user equipment in the cache when the handover determining unit determines that the user equipment needs to be switched, or after the handover determining unit determines that the user equipment needs to be switched Package

信息获取单元，用于从所述源中继节点获取所述用户设备的接收状态信息； An information acquiring unit, configured to acquire, by the source relay node, the receiving status information of the user equipment;

丟失数据确定单元，用于根据所述信息获取单元获取的接收状态信息确定是否存在丟失的数据包；包时，根据所述接收状态信息从所述源中继节点获取所述丟失的数据包。一种切换处理方法，包括： a lost data determining unit, configured to determine, according to the receiving status information acquired by the information acquiring unit, whether there is a lost data packet; At the time of the packet, the lost data packet is acquired from the source relay node according to the received state information. A switching processing method includes:

向源演进基站发送用户设备的接收状态信息； Sending the receiving status information of the user equipment to the source evolved base station;

在接收由所述源演进基站发送的丟包消息时，根据所述丟包消息向所述源演进基站发送丟失的数据包。 When receiving the packet loss message sent by the source evolved base station, the lost data packet is sent to the source evolved base station according to the packet loss message.

一种中继节点，包括： A relay node, comprising:

状态信息发送单元，用于向源演进基站发送用户设备的接收状态信息；丟包消息接收单元，用于接收由所述源演进基站发送的丟包消息；丟失数据发送单元，用于在所述丟包消息接收单元接收丟包消息时，根据所述丟包消息向所述源演进基站发送丟失的数据包。 a status information sending unit, configured to send, to the source evolved base station, receive status information of the user equipment; a packet loss message receiving unit, configured to receive a packet loss message sent by the source evolved base station; and a lost data sending unit, configured to When receiving the packet loss message, the packet loss receiving unit sends the lost data packet to the source evolved base station according to the packet loss message.

本发明实施例提供的切换处理方法、基站及中继节点，通过源演进基站在确定用户设备需要切换时，或者在确定所述用户设备需要切换后的指定时刻，停止清除緩存中被源中继节点接收的所述用户设备的数据包，并从源中继节点获取所述用户设备的接收状态信息，在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取丟失的数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 The handover processing method, the base station, and the relay node provided by the embodiment of the present invention stop the clearing of the source relay in the cache by the source evolved base station when determining that the user equipment needs to be switched, or after determining that the user equipment needs to be switched. Receiving, by the node, the data packet of the user equipment, and acquiring, by the source relay node, the receiving status information of the user equipment, and when determining that there is a lost data packet according to the receiving status information, according to the receiving status information, The source relay node obtains the lost data packet, reduces the possibility that the source evolved base station loses the data packet during the handover process, reduces the number of cleared data packets that the source relay node returns to the source evolved base station, and saves the radio resource.

附图说明 DRAWINGS

为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly described, and the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

图 1为本发明实施例提供的一种切换处理方法的流程示意图； FIG. 1 is a schematic flowchart of a handover processing method according to an embodiment of the present disclosure;

图 2为本发明实施例在情况 1时提供的一种切换处理方法的流程示意图；图 3为本发明实施例在情况 2时提供的一种切换处理方法的流程示意图；图 4为本发明实施例在情况 3时提供的一种切换处理方法的流程示意图；图 5为本发明实施例在情况 4时提供的一种切换处理方法的流程示意图；图 6为本发明实施例在情况 5时提供的一种切换处理方法的流程示意图；图 7为本发明实施例在情况 6时提供的一种切换处理方法的流程示意图；图 8为本发明实施例在情况 7时提供的一种切换处理方法的流程示意图；图 9为本发明实施例在情况 8时提供的一种切换处理方法的流程示意图；图 10为本发明实施例在情况 2时提供的另一种切换处理方法的流程示意图； 2 is a schematic flowchart of a handover processing method provided in Case 1 according to an embodiment of the present invention; FIG. 3 is a schematic flowchart of a handover processing method provided in Case 2 according to an embodiment of the present invention; A schematic flowchart of a handover processing method provided in Case 3; FIG. 5 is a schematic flowchart of a handover processing method provided in case 4 of the embodiment of the present invention; FIG. 6 is a schematic flowchart of a handover processing method provided in case 5 of the embodiment of the present invention; FIG. 8 is a schematic flowchart diagram of a handover processing method provided in case 7 in the embodiment of the present invention; FIG. 9 is a schematic diagram of a handover processing method according to an embodiment of the present invention. FIG. 10 is a schematic flowchart diagram of another handover processing method provided in Case 2 according to an embodiment of the present invention;

图 11为本发明实施例在情况 3时提供的另一种切换处理方法的流程示意图； FIG. 11 is a schematic flow chart of another handover processing method provided in case 3 in the embodiment of the present invention; FIG.

图 12为本发明实施例在情况 4时提供的另一种切换处理方法的流程示意图； FIG. 12 is a schematic flow chart of another handover processing method provided in Case 4 according to an embodiment of the present invention; FIG.

图 1 3为本发明实施例提供的另一种切换处理方法的流程示意图；图 14为本发明实施例提供的一种基站的构成示意图； FIG. 13 is a schematic flowchart of another handover processing method according to an embodiment of the present invention; FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

图 15为本发明实施例提供的一种中继节点的构成示意图； FIG. 15 is a schematic structural diagram of a relay node according to an embodiment of the present disclosure;

图 16为本发明实施例提供的一种切换处理***的构成示意图。 FIG. 16 is a schematic structural diagram of a handover processing system according to an embodiment of the present invention.

具体实施方式 detailed description

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

为了节约切换过程中所使用的 RN和 eNB之间的无线资源，本发明实施例提供了一种切换处理方法，如图 1所示，本发明实施例切换处理方法，包括： In order to save the radio resource between the RN and the eNB used in the handover process, the embodiment of the present invention provides a handover processing method. As shown in FIG. 1 , the handover processing method of the embodiment of the present invention includes:

101、源演进基站在确定用户设备需要切换时，或在确定所述用户设备需要切换后的指定时刻，停止清除緩存中所述用户设备的数据包。 101. The source evolved base station stops clearing the data packet of the user equipment in the cache when determining that the user equipment needs to be switched, or after determining that the user equipment needs to be switched.

在此，对在本发明实施例中用到的几个概念做一下描述，其中，源中继节点（source re l ay node , S-RN )是指切换前用户设备接入的中继节点；源演进基站（source eNB , S-eNB )是指用户设备所接入的源中继节点的授予 ( donor )演进基站；而在以下描述中所提到的目标中继节点（Target re l ay node , T-RN )是指切换后用户设备接入的中继节点；目标演进基站（ Target eNB, T-eNB )是指切换后用户设备接入的演进基站，或者切换后用户设备所接入的目标中继节点的授予（donor ) 演进基站。 Here, a description is given of several concepts used in the embodiments of the present invention, where a source re- y node (S-RN) refers to a relay node accessed by a user equipment before handover; Source An evolved base station (source eNB, S-eNB) refers to a donor evolved base station of a source relay node accessed by a user equipment; and a target relay node (Target re l ay node , mentioned in the following description) The T-RN is the relay node that the user equipment accesses after the handover; the target eNB (T-eNB) refers to the evolved base station that the user equipment accesses after the handover, or the target that the user equipment accesses after the handover. The relay node grants the evolved base station.

另外，源演进基站还可以停止向所述源中继节点发送所述用户设备的数据包。 In addition, the source evolved base station may also stop sending the data packet of the user equipment to the source relay node.

102、源演进基站从源中继节点获取所述用户设备的接收状态信息。 102. The source evolved base station acquires the receiving state information of the user equipment from the source relay node.

源中继节点可以向源演进基站发送接收状态报告，源演进基站从接收的接收状态报告中获取所述用户设备的接收状态信息。或者，源中继节点也可以在向源演进基站发送的切换请求中携带接收状态信息，源演进基站从接收的切换请求中获取所述用户设备的接收状态信息。 The source relay node may send a reception status report to the source evolved base station, and the source evolved base station acquires the reception status information of the user equipment from the received reception status report. Alternatively, the source relay node may also carry the receiving status information in the handover request sent to the source evolved base station, and the source evolved base station acquires the receiving status information of the user equipment from the received handover request.

103、源演进基站在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取丟失的数据包。 103. The source evolved base station acquires a lost data packet from the source relay node according to the received state information when determining that there is a lost data packet according to the received state information.

源演进基站还可以根据所述接收状态信息向所述目标节点发送所述用户设备的数据包和 /或所述用户设备的接收状态消息。 The source evolved base station may further send the data packet of the user equipment and/or the receiving status message of the user equipment to the target node according to the receiving status information.

本发明实施例提供的切换处理方法，通过源演进基站在确定用户设备需要切换时，或者在确定所述用户设备需要切换后的指定时刻，停止清除緩存中被源中继节点接收的所述用户设备的数据包，并从源中继节点获取所述用户设备的接收状态信息，在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取丟失的数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 The handover processing method provided by the embodiment of the present invention stops the clearing of the user received by the source relay node in the cache when the source evolved base station determines that the user equipment needs to be switched, or after determining that the user equipment needs to be switched. a data packet of the device, and acquiring, by the source relay node, the receiving state information of the user equipment, and when determining that there is a lost data packet according to the receiving state information, acquiring, according to the receiving state information, the source relay node The lost data packet reduces the possibility of the source evolved base station losing data packets during the handover process, reduces the number of cleared data packets returned by the source relay node to the source evolved base station, and saves radio resources.

在上述实施例中， UE从 S-RN切换到目标节点主要可以分为以下四种情况： UE从 S-RN切换到 S-eNB; UE从 S-RN切换到 T-eNB; UE从 S-RN切换到接入 T-eNB的 T-RN; UE从 S-RN切换到接入 S-eNB的 T-RN。另外，可以由 S-RN做出 UE切换的决定，也可以由 S-eNB做出 UE切换的决定。以下分别结合上述不同情况，对上述实施例作进一步详细描述。 In the foregoing embodiment, the UE switching from the S-RN to the target node may be mainly divided into the following four cases: the UE switches from the S-RN to the S-eNB; the UE switches from the S-RN to the T-eNB; the UE from the S-RN The RN switches to the T-RN accessing the T-eNB; the UE switches from the S-RN to the T-RN accessing the S-eNB. In addition, it can be done by S-RN The decision of the UE handover may also be made by the S-eNB to make a UE handover decision. The above embodiments are further described in detail below in combination with the above different situations.

情况一、由 S-RN做出 UE切换的决定， UE从 S-RN切换到 S-eNB 如图 2所示，本发明实施例切换处理方法，包括： Case 1: The S-RN makes a UE handover decision, and the UE switches from the S-RN to the S-eNB. As shown in FIG. 2, the handover processing method of the embodiment of the present invention includes:

201、 UE向源中继节点发送测量报告，源中继节点根据测量报告以及其他的无线资源信息做出切换决定，选择源演进基站为目标节点。 201. The UE sends a measurement report to the source relay node, where the source relay node makes a handover decision according to the measurement report and other radio resource information, and selects the source evolved base station as the target node.

202、源中继节点向源演进基站发送切换请求，该切换请求包含 UE 的上下文信息等。举例而言，该切换请求可以通过使用 X2接口的消息方式实现传输，也可以通过采用 RRC消息方式实现传输。 202. The source relay node sends a handover request to the source evolved base station, where the handover request includes the UE's context information and the like. For example, the handover request can be implemented by using a message mode of the X2 interface, or by using an RRC message.

203、源演进基站接收该切换请求后，根据所述切换请求确定目标节点为源演进基站后，执行准入控制，若根据所述准入控制结果确定允许所述用户设备接入，则源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 203. After receiving the handover request, the source evolved base station determines, after determining that the target node is the source evolved base station, performs the admission control according to the handover request, and if it is determined that the user equipment is allowed to access according to the admission control result, the source evolves. The base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

S-eNB可以在接收由 S-RN发送的切换请求后，解析该切换请求，从该切换请求中获取目标节点为 S-eNB 的信息。另外，该切换请求还可以携带目标地址， S-eNB在接收由 S-RN发送的切换请求后，判断该切换请求的目标地址为自身，则解析该切换请求，从该切换请求中获取目标节点为 S-eNB的信息。 After receiving the handover request sent by the S-RN, the S-eNB may parse the handover request, and obtain information of the target node as the S-eNB from the handover request. In addition, the handover request may further carry a target address, and after receiving the handover request sent by the S-RN, the S-eNB determines that the target address of the handover request is itself, parses the handover request, and acquires the target node from the handover request. Information for the S-eNB.

在本发明实施例中， S-eNB停止清除緩存中所述 UE的数据包，即 S-eNB 不管其发往 S-RN的 UE的数据包是否已经被正确接收，这些已经緩存的数据包都不再进行清除。具体地， S-eNB停止清除緩存中所述 UE的数据包的开始时刻可以是 S-eNB确定 UE需要切换的时刻，也可以是 S-eNB确定 UE需要切换的时刻到 S-eNB停止向 S-RN发送数据包的时刻之间的任意时刻，还可以是 S-eNB停止向 S-RN发送数据包的时刻。另外，若 S-eNB仅停止清除緩存中的 UE的数据包，不停止向 S-RN发送数据包，则 S-eNB停止清除緩存中所述 UE 的数据包的开始时刻可以是 S-eNB确定所述 UE需要切换的时刻到 S-eNB确定所述 UE被允许切换的时刻之间的任意时刻，也可以是 S-eNB确定所述 UE被允许切换的时刻。 In the embodiment of the present invention, the S-eNB stops clearing the data packet of the UE in the cache, that is, whether the data packet of the UE sent by the S-RN to the S-RN has been correctly received, and the cached data packets are all No more cleaning. Specifically, the start time of the S-eNB to stop clearing the data packet of the UE in the buffer may be the time when the S-eNB determines that the UE needs to be handed over, or may be the time when the S-eNB determines that the UE needs to be handed over until the S-eNB stops to the S. The arbitrary time between when the RN transmits the data packet may be the time when the S-eNB stops transmitting the data packet to the S-RN. In addition, if the S-eNB only stops clearing the data packet of the UE in the buffer and does not stop sending the data packet to the S-RN, the S-eNB may stop clearing the start time of the data packet of the UE in the buffer, which may be determined by the S-eNB. The time when the UE needs to be handed over to any time between when the S-eNB determines that the UE is allowed to be handed over, or the S-eNB determines that the UE is The moment when the switch is allowed.

在情况一中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 1, the S-eNB may stop sending the data packet of the UE to the S-RN at least at the following times:

当后述 S-eNB向 S-RN发送切换请求确认后即停止向 S-RN发送所述 UE的数据包； When the S-eNB sends a handover request acknowledgement to the S-RN, it stops sending the data packet of the UE to the S-RN.

或者 S-eNB也可以在确定允许 UE接入时停止向 S-RN发送所述 UE的数据包； Or the S-eNB may stop sending the data packet of the UE to the S-RN when determining that the UE is allowed to access;

或者 S-eNB也可以在比确定允许 UE接入的时刻滞后一段时间 T时停止向 S-RN发送所述 UE的数据包。 Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when it is delayed by a period of time T than determining that the UE is allowed to access.

或者也可以是 S-RN发送切换命令（或称之为带有移动性控制信息的 RRC 连接重配置消息）， S-RN将第一个从 S-eNB新接收的但是还没有向 UE发送的数据包的序列号发送给 S-eNB; 当 S-eNB接收到该序列号信息时，即停止向 S-RN发送 UE的数据包。 Alternatively, the S-RN may also send a handover command (or an RRC connection reconfiguration message with mobility control information), and the S-RN will first receive the new one from the S-eNB but has not yet sent to the UE. The sequence number of the data packet is sent to the S-eNB; when the S-eNB receives the sequence number information, the data packet of the UE is stopped from being sent to the S-RN.

或者 S-RN可以直接向 S-eNB发送一个停止传输请求消息，请求 S-eNB停止向 S-RN传输该 UE的数据。当 S-eNB接收到该消息后即停止向 S-RN发送该 UE的数据包。 Or the S-RN may directly send a stop transmission request message to the S-eNB, requesting the S-eNB to stop transmitting the data of the UE to the S-RN. When the S-eNB receives the message, it stops sending the data packet of the UE to the S-RN.

或者也可以是 S-eNB向 S-RN发送一个停止传输请求消息，然后 S-RN向 S-eNB发送一个确认消息，当 S-eNB接收到该确认消息后即停止向 S-RN发送该 UE的数据包。 Alternatively, the S-eNB may send a stop transmission request message to the S-RN, and then the S-RN sends an acknowledgement message to the S-eNB, and stops sending the UE to the S-RN when the S-eNB receives the acknowledgement message. Packet.

或者也可以是当 S-eNB接收到后述 S-RN发送的 UE的接收状态报告时停止向 S-RN发送该 UE的数据包。 Alternatively, when the S-eNB receives the reception status report of the UE transmitted by the S-RN described later, the S-eNB may stop transmitting the data packet of the UE to the S-RN.

204、源演进基站向源中继节点发送切换请求确认。 204. The source evolved base station sends a handover request acknowledgement to the source relay node.

205、源中继节点接收由源演进基站发送的切换请求确认后，向源演进基站发送所述用户设备的接收状态报告。 205. After receiving the handover request acknowledgement sent by the source evolved base station, the source relay node sends the reception status report of the user equipment to the source evolved base station.

具体地， S-RN可以在接收到切换请求确认时就停止向 UE发送数据包并向 S-eNB发送该 UE的接收状态报告，也可以在向 UE发送切换命令时停止向 UE 发送数据包并向 S-eNB发送该 UE的接收状态报告。另外， S-eNB也可以在步骤 202发送切换请求时，将所述 UE的接收状态报告发送给 S-eNB。 Specifically, the S-RN may stop sending a data packet to the UE and send a reception status report of the UE to the S-eNB when receiving the handover request acknowledgement, or may stop the UE when transmitting the handover command to the UE. The data packet is transmitted and the reception status report of the UE is sent to the S-eNB. In addition, the S-eNB may send the reception status report of the UE to the S-eNB when the handover request is sent in step 202.

在本发明实施例中，所述接收状态报告的内容在 RLC确认模式和 RLC非确认模式下，有所不同： In the embodiment of the present invention, the content of the reception status report is different in the RLC confirmation mode and the RLC non-confirmation mode:

对于 RLC确认模式： For the RLC confirmation mode:

所述接收状态报告可以包括 S-RN向 UE最后发送的一个或多个新的数据包的序列号和该数据包的接收状态，以及未被 UE确认正确接收的数据包的序列号。或者，所述接收状态报告也可以包括 S-RN向 UE最先未发送的一个或多个新的数据包的序列号，以及未被 UE确认正确接收的数据包的序列号。或者，所述接收状态报告也可以不携带未被 UE确认正确接收的数据包的序列号，而携带已被 UE确认正确接收的数据包的序列号。 The reception status report may include a sequence number of one or more new data packets finally transmitted by the S-RN to the UE and a reception status of the data packet, and a sequence number of the data packet that is not correctly received by the UE. Alternatively, the receiving status report may also include a sequence number of one or more new data packets that the S-RN does not transmit to the UE first, and a sequence number of the data packet that is not correctly received by the UE. Alternatively, the receiving status report may not carry the sequence number of the data packet that is not correctly received by the UE, but carries the sequence number of the data packet that has been correctly received by the UE.

另外，所述接收状态报告可以是一条消息，也可以是其他形式，例如， S-RN向 S-eNB发送一个或者多个特殊的终止点数据包，该终止点数据包包含 S-RN向 UE最后传输的一个或多个新的数据包的序列号，该终止点数据包表示当前 S-RN从哪个数据包开始已经停止向 UE发送数据。并且， S-RN在向 S-eNB 发送的状态报告中包含 S-RN向 UE发送的终止数据包之前并且包含该终止数据包在内的、未被 UE确认正确接收的数据包的序列号。 In addition, the receiving status report may be a message, or may be other forms. For example, the S-RN sends one or more special termination point data packets to the S-eNB, where the termination point data packet includes the S-RN to the UE. The sequence number of the last transmitted one or more new data packets indicating that the current S-RN has stopped transmitting data to the UE from which data packet. And, the S-RN includes, in the status report sent to the S-eNB, a sequence number of the data packet that is received by the S-RN before the termination packet and that is included in the termination packet and that is not correctly acknowledged by the UE.

对于 RLC非确认模式： For RLC unacknowledged mode:

所述接收状态报告可以包括 S-RN向 UE最后发送的一个或多个新的数据包的序列号或 S-RN向 UE最先未发送的一个或多个新的数据包的序列号。 The reception status report may include a sequence number of one or more new data packets that the S-RN last transmitted to the UE or a sequence number of one or more new data packets that the S-RN did not transmit to the UE first.

本发明实施例中提到的数据包的序列号，可以是 PDCP SDU ( Packet Da ta Convergence Protoco l Service Data Uni t , 分组数据汇聚协议业务数据单元）的序列号，或者 RLC SDU ( Radio Link Control Service Data Uni t , 无线链路控制业务数据单元）序列号，或者 RLC PDU ( Radio Link Control Protoco l Data Uni t, 无线链路控制协议数据单元）序列号，也可以是 RTP/UDP/ IP/ESP等核心网数据包的序列号。此外，也可以是一个映射表，该映射表中指示了未被 UE正确接收的 RLC PDU与其他数据包（如 PDCP数据包或者核心网数据包）之间的序列号的对应关系。 The sequence number of the data packet mentioned in the embodiment of the present invention may be a serial number of a PDCP SDU (Packet Data Center Protocol Data Service Unit) or an RLC SDU (Radio Link Control Service) Data Uni t, radio link control service data unit) serial number, or RLC PDU (Radio Link Control Protoco l Data Uni t, radio link control protocol data unit) serial number, can also be RTP/UDP/IP/ESP, etc. The serial number of the core network packet. In addition, it can also be a mapping table, The correspondence between the RLC PDUs that are not correctly received by the UE and the sequence numbers between other data packets (such as PDCP data packets or core network data packets) is indicated in the mapping table.

206、源演进基站接收所述接收状态报告后，根据所述接收状态报告清除緩存中多余数据包。 206. After receiving the receiving status report, the source evolved base station clears the excess data packet in the cache according to the receiving status report.

在本发明实施例中， S-eNB在 RLC确认模式和 RLC非确认模式下，根据接收状态报告确定多余数据包的方法不同： In the embodiment of the present invention, the S-eNB determines the method for determining the excess data packet according to the receiving status report in the RLC acknowledge mode and the RLC unacknowledged mode:

对于 RLC确认模式： For the RLC confirmation mode:

S-eNB可以根据 S-RN向 UE最后发送的新的数据包的序列号和未被 UE确认正确接收的数据包的序列号，以及緩存中 UE的数据包的序列号，确定緩存中序列号在最后发送的数据包的序列号之前，且不是未被 UE确认正确接收的数据包的序列号，为已被 UE确认正确接收的数据包，将确定的已被 UE确认正确接收的数据包作为多余数据包清除。或者， S-eNB也可以根据 S-RN向 UE 最先未发送的新的数据包的序列号和未被 UE 确认正确接收的数据包的序列号，以及緩存中 UE的数据包的序列号，确定已被 UE确认正确接收的数据包并进行清除。 The S-eNB may determine the sequence number in the cache according to the sequence number of the new data packet finally sent by the S-RN to the UE and the sequence number of the data packet that is not correctly received by the UE, and the sequence number of the data packet of the UE in the cache. Before the sequence number of the last transmitted data packet, and not the sequence number of the data packet that is not correctly received by the UE, the data packet that has been correctly received by the UE is confirmed, and the determined data packet that has been correctly received by the UE is determined as Extra packets are cleared. Alternatively, the S-eNB may also use the sequence number of the new data packet that the S-RN does not send to the UE first and the sequence number of the data packet that is not correctly received by the UE, and the sequence number of the data packet of the UE in the cache. It is determined that the data packet that has been correctly received by the UE is confirmed and cleared.

对于 RLC非确认模式： For RLC unacknowledged mode:

S-eNB可以根据 S-RN向 UE最后发送的新的数据包的序列号或最先未发送的新的数据包的序列号，以及緩存中 UE的数据包的序列号，确定緩存中已经向所述 UE发送的数据包，将确定的已经向所述 UE发送的数据包作为多余数据包清除。 The S-eNB may determine that the cache has been forwarded according to the sequence number of the new data packet sent by the S-RN to the UE or the sequence number of the new data packet that is not sent first, and the sequence number of the data packet of the UE in the cache. The data packet sent by the UE clears the determined data packet that has been sent to the UE as a redundant data packet.

207、源演进基站在根据所述接收状态报告确定存在丟失数据包时，根据所述接收状态报告确定丟失的数据包，并向所述源中继节点发送丟包消息，所述丟包消息携带所述确定的丟失的数据包的序列号。 207. The source evolved base station determines, according to the received status report, that a lost data packet exists, determines a lost data packet according to the received status report, and sends a packet loss message to the source relay node, where the packet loss message carries The determined serial number of the lost data packet.

在本发明实施例中， S-eNB在 RLC确认模式和 RLC非确认模式下，根据接收状态报告确定丟失的数据包的方法不同： In the embodiment of the present invention, the S-eNB determines the method of determining the lost data packet according to the received status report in the RLC acknowledge mode and the RLC unacknowledged mode:

对于 RLC确认模式： S-eNB根据未被 UE确认正确接收的数据包的序列号以及緩存中所述 UE的数据包的序列号，确定緩存中不存在的未被所述 UE确认正确接收的数据包，将所述确定的未被所述 UE确认正确接收的数据包作为丟失的数据包。或者， S-eNB也可以根据已被 UE确认正确接收的数据包的序列号以及緩存中所述 UE 的数据包的序列号确定丟失的数据包。 For the RLC confirmation mode: The S-eNB determines, according to the sequence number of the data packet that is not correctly received by the UE and the sequence number of the data packet of the UE in the cache, that the data packet that is not in the cache and that is not correctly received by the UE is determined, The determined data packet that is not correctly received by the UE is confirmed as a lost data packet. Alternatively, the S-eNB may also determine the lost data packet according to the sequence number of the data packet that has been correctly received by the UE and the sequence number of the data packet of the UE in the cache.

对于 RLC非确认模式： For RLC unacknowledged mode:

S-eNB根据 S-RN向 UE最后发送的新的数据包的序列号，以及緩存的所述 UE的数据包的序列号，确定序列号在最后发送的新的数据包的序列号与最先緩存的数据包的序列号之间的数据包，将所述确定的数据包作为丟失的数据包。或者， S-eNB也可以根据 S-RN向 UE最先未发送的新的数据包的序列号，以及緩存的所述 UE的数据包的序列号，确定序列号为最先未发送的新的数据包的序列号或在最先未发送的新的数据包的序列号与最先緩存的数据包的序列号之间的序列号的数据包，将所述确定的数据包作为丟失的数据包。 The S-eNB determines the sequence number of the last new packet sent by the S-RN according to the sequence number of the new data packet sent by the S-RN to the UE and the sequence number of the buffered UE. A packet between the sequence numbers of the cached packets, and the determined packet is taken as a lost packet. Alternatively, the S-eNB may determine, according to the sequence number of the new data packet that the S-RN does not send to the UE first, and the sequence number of the buffered UE data packet, to determine that the sequence number is the first unsent new packet. The serial number of the data packet or the data packet of the serial number between the serial number of the new data packet that was not sent first and the serial number of the first cached data packet, and the determined data packet is regarded as the lost data packet. .

208、源中继节点接收所述丟包消息后，从所述丟包消息中获取丟失的数据包的序列号，根据所述丟失的数据包的序列号向所述源演进基站发送所述丟失的数据包。源演进基站接收由所述源中继节点发送的所述丟失的数据包后，緩存所述丟失的数据包。 208. After receiving the packet loss message, the source relay node obtains a sequence number of the lost data packet from the packet loss message, and sends the loss to the source evolved base station according to the sequence number of the lost data packet. Packet. After the source evolved base station receives the lost data packet sent by the source relay node, the lost data packet is buffered.

另外，所述用户设备在接收由源中继节点发送的切换命令后，执行向源演进基站的接入。 In addition, the user equipment performs access to the source evolved base station after receiving the handover command sent by the source relay node.

情况二、由 S-RN做出 UE切换的决定， UE从 S-RN切换到 T-eNB 如图 3所示，本发明实施例切换处理方法，包括： Case 2: The S-RN makes a UE handover decision, and the UE switches from the S-RN to the T-eNB. As shown in FIG. 3, the handover processing method of the embodiment of the present invention includes:

301、 UE向源中继节点发送测量报告，源中继节点根据测量报告以及其他的无线资源信息做出切换决定，选择目标演进基站为目标节点。 301. The UE sends a measurement report to the source relay node, where the source relay node makes a handover decision according to the measurement report and other radio resource information, and selects the target evolved base station as the target node.

步骤 302同步骤 202。 Step 302 is the same as step 202.

303、源演进基站接收该切换请求后，确定目标节点为目标演进基站，将所述切换请求转发给目标演进基站。 S-eNB可以在接收由 S-RN发送的切换请求后，解析该切换请求，从该切换请求中获取目标节点为 T-eNB的信息，将所述切换请求转发给 T-eNB。 303. After receiving the handover request, the source evolved base station determines that the target node is the target evolved base station, and forwards the handover request to the target evolved base station. After receiving the handover request sent by the S-RN, the S-eNB may parse the handover request, obtain information of the T-eNB from the handover request, and forward the handover request to the T-eNB.

304、目标演进基站接收源演进基站转发的切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标演进基站向源演进基站发送切换请求确认。 304. After receiving the handover request forwarded by the source evolved base station, the target evolved base station performs admission control. If the admission control result is that the user equipment is allowed to access, the target evolved base station sends a handover request acknowledgement to the source evolved base station.

305、源演进基站接收由所述目标演进基站发送的切换请求确认后，根据所述切换请求确认，确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 305. After receiving the handover request acknowledgement sent by the target evolved base station, the source evolved base station determines, according to the handover request acknowledgement, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

在情况二中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 2, the S-eNB may stop transmitting the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN转发切换请求确认后即停止向 S-RN发送该 UE的数据包。或者 S-eNB也可以在接收到 T-eNB发送的包含允许 UE接入的切换请求确认时停止向 S-RN发送该 UE的数据包。 When the S-eNB forwards the handover request acknowledgement to the S-RN, it stops sending the data packet of the UE to the S-RN. Alternatively, the S-eNB may stop sending the data packet of the UE to the S-RN when receiving the handover request acknowledgement that the T-eNB sends the UE to allow the UE to access.

或者 S-eNB也可以在比向 S-RN转发切换请求确认的时刻滞后一段时间 T 时停止向 S-RN发送该 UE的数据包。 Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when the time delay T is delayed from the time when the handover request acknowledgement is forwarded to the S-RN.

或者也可以是 S-RN发送切换命令时， S-RN即可以将第一个从 S-eNB新接收的但是还没有向 UE发送的数据包的序列号发送给 S-eNB; 当 S-eNB接收到该序列号信息时，即停止向 S-RN发送该 UE的数据包。 Alternatively, when the S-RN sends a handover command, the S-RN may send the sequence number of the first data packet newly received from the S-eNB but not yet transmitted to the UE to the S-eNB; When the serial number information is received, the data packet of the UE is stopped from being sent to the S-RN.

或者 S-RN可以直接向 S-eNB发送一个停止传输请求消息，请求 S-eNB停止向 S-RN传输该 UE的数据。当 S-eNB接收到该消息后即停止传输该 UE的数据给 S-RN。 Or the S-RN may directly send a stop transmission request message to the S-eNB, requesting the S-eNB to stop transmitting the data of the UE to the S-RN. When the S-eNB receives the message, it stops transmitting the data of the UE to the S-RN.

或者也可以是当 S-eNB接收到后述 S-RN发送的 UE的接收状态报告时停止向 S-RN发送该 UE的数据包。 Or may be stopped when the S-eNB receives the reception status report of the UE sent by the S-RN described later. The data packet of the UE is sent to the S-RN.

步骤 306 ~ 31 0同步骤 204 ~ 208。 Steps 306 ~ 31 0 are the same as steps 204 ~ 208.

31 1、源演进基站向目标演进基站发送緩存中所述用户设备的数据包；和 /或向所述目标演进基站发送所述用户设备的接收状态消息。 31. The source evolved base station sends a data packet of the user equipment in the buffer to the target evolved base station; and/or sends a reception status message of the user equipment to the target evolved base station.

S-eNB可以在接收由 S-RN发送的丟失数据包后，就向 T-eNB发送緩存中的所述 UE的数据包以及所述 UE的接收状态消息。或者， S-eNB也可以在 UE 成功接入 T-eNB后，向 T-eNB发送緩存中的所述 UE的数据包以及所述 UE的接收状态消息，例如， UE成功接入 T-eNB后， T-eNB向 S-eNB发送数据传输请求， S-eNB接收所述数据传输请求后，向 T-eNB发送緩存中的所述 UE的数据包以及所述 UE的接收状态消息。 After receiving the lost data packet sent by the S-RN, the S-eNB may send the buffered data packet of the UE and the receiving status message of the UE to the T-eNB. Or, after the UE successfully accesses the T-eNB, the S-eNB may send the data packet of the UE in the buffer and the receiving status message of the UE to the T-eNB, for example, after the UE successfully accesses the T-eNB. The T-eNB sends a data transmission request to the S-eNB, and after receiving the data transmission request, the S-eNB sends the buffered data packet of the UE and the receiving status message of the UE to the T-eNB.

具体地， S-eNB可以根据 S-RN发送的 UE的接收状态报告，按序将所有下行未被 UE正确接收的数据包及这些数据包的序列号转发给 T-eNB。另外， S-eNB 也可以将从 S 1接口接收的新的数据包发送给 T-eNB。 Specifically, the S-eNB may sequentially forward all the data packets that are not correctly received by the UE and the sequence numbers of the data packets to the T-eNB according to the reception status report of the UE sent by the S-RN. In addition, the S-eNB may also send a new data packet received from the S1 interface to the T-eNB.

S-eNB可以将从 S-RN接收的该 UE的接收状态报告，作为接收状态消息转发给 T-eNB。或者， S-eNB也可以向 T-eNB发送一个新的接收状态消息。在本发明实施例中， S-eNB在 RLC确认模式和 RLC非确认模式下，向 T-eNB发送的接收状态消息的内容有所不同： The S-eNB may forward the reception status report of the UE received from the S-RN to the T-eNB as a reception status message. Alternatively, the S-eNB may also send a new reception status message to the T-eNB. In the embodiment of the present invention, the content of the receiving status message sent by the S-eNB to the T-eNB in the RLC acknowledge mode and the RLC unacknowledged mode is different:

对于 RLC确认模式： For the RLC confirmation mode:

该接收状态消息包括 S-RN向 UE最后发送的一个或多个新数据包的序列号以及该数据包的接收状态，或者 S-RN向 UE最先未发送的一个或多个新的数据包的序列号。或者，该接收状态消息可以包括 T-eNB应该向新的数据包分配的第一个序列号。 The receiving status message includes a sequence number of one or more new data packets finally sent by the S-RN to the UE, and a receiving status of the data packet, or one or more new data packets that the S-RN does not send to the UE first. Serial number. Alternatively, the reception status message may include a first sequence number that the T-eNB should assign to the new data packet.

对于 RLC非确认模式： For RLC unacknowledged mode:

该接收状态消息包括 S-RN向 UE最后发送的一个或多个新数据包的序列号，或者 S-RN向 UE最先未发送的一个或多个新的数据包的序列号。 The receiving status message includes a sequence number of one or more new data packets finally sent by the S-RN to the UE, or a sequence number of one or more new data packets that the S-RN does not transmit to the UE first.

在步骤 303、 305中， S-eNB需要解析切换请求和切换请求确认。另外， S-eNB 还可以不解析该切换请求，将该切换请求透传给目标演进基站。如图 1 0所示，本发明实施例切换处理方法，包括： In steps 303, 305, the S-eNB needs to resolve the handover request and the handover request acknowledgement. In addition, The S-eNB may also not transparently parse the handover request, and transparently transmit the handover request to the target evolved base station. As shown in FIG. 10, the switching processing method of the embodiment of the present invention includes:

步骤 1 001同步骤 301。 Step 1 001 is the same as step 301.

1 002、源中继节点向源演进基站发送切换请求，该切换请求包含 UE的上下文信息、目标地址等。举例而言，该切换请求可以通过使用 X2接口的消息方式实现传输，也可以通过采用 RRC消息方式实现传输。 1 002. The source relay node sends a handover request to the source evolved base station, where the handover request includes the UE's context information, a target address, and the like. For example, the handover request may be implemented by using a message mode of the X2 interface, or by using an RRC message.

1 003、源演进基站接收该切换请求后，确定切换请求的目标地址不是自己的地址，根据该目标地址将所述切换请求透传给目标演进基站。 After receiving the handover request, the source evolved base station determines that the target address of the handover request is not its own address, and transparently transmits the handover request to the target evolved base station according to the target address.

步骤 1 004同步骤 304。 Step 1 004 is the same as step 304.

1 005、源演进基站接收该切换请求确认后，将该切换请求确认透传给源中继节点。 After receiving the handover request acknowledgement, the source evolved base station transparently transmits the handover request acknowledgement to the source relay node.

1 006、源中继节点接收该切换请求确认后，向源演进基站发送切换指示消息。 After receiving the handover request acknowledgement, the source relay node sends a handover indication message to the source evolved base station.

1 007、源演进基站接收所述切换指示消息后，根据所述切换指示消息确定允许用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 After receiving the handover indication message, the source evolved base station determines, according to the handover indication message, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

步骤 1 008 ~ 1 012同步骤 307 ~ 31 1。 Steps 1 008 ~ 1 012 are the same as steps 307 ~ 31 1.

情况三、由 S-RN做出 UE切换的决定， UE从 S-RN切换到 T-eNB的 T-RN 如图 4所示，本发明实施例切换处理方法，包括： Case 3: The S-RN makes a UE handover decision, and the UE switches from the S-RN to the T-RN of the T-eNB. As shown in FIG. 4, the handover processing method of the embodiment of the present invention includes:

401、 UE向源中继节点发送测量报告，源中继节点根据测量报告以及其他的无线资源信息做出切换决定，选择目标演进基站的目标中继节点为目标节点。 401. The UE sends a measurement report to the source relay node, where the source relay node makes a handover decision according to the measurement report and other radio resource information, and selects the target relay node of the target evolved base station as the target node.

步骤 402同步骤 302。 Step 402 is the same as step 302.

403、源演进基站接收该切换请求后，确定目标节点为目标演进基站的目标中继节点，将所述切换请求转发给目标演进基站。目标演进基站接收源演进基站转发的切换请求后，将所述切换请求转发给目标中继节点。 S-eNB可以在接收由 S-RN发送的切换请求后，解析该切换请求，从该切换请求中获取目标节点为被接入 T-eNB的 T-RN的信息，将所述切换请求转发给 T-RN。 403. After receiving the handover request, the source evolved base station determines that the target node is the target relay node of the target evolved base station, and forwards the handover request to the target evolved base station. After receiving the handover request forwarded by the source evolved base station, the target evolved base station forwards the handover request to the target relay node. After receiving the handover request sent by the S-RN, the S-eNB may parse the handover request, obtain the information that the target node is the T-RN that is accessed by the T-eNB, and forward the handover request to the handover request. T-RN.

404、目标中继节点接收目标演进基站转发的切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标中继节点向目标演进基站发送切换请求确认，目标演进基站将该切换请求确认转发给源演进基站。 404. After receiving the handover request forwarded by the target evolved base station, the target relay node performs admission control. If the admission control result is that the user equipment is allowed to access, the target relay node sends a handover request acknowledgement to the target evolved base station, and the target evolved base station forwards the handover request acknowledgement to the source evolved base station.

405、源演进基站接收该切换请求确认后，根据该切换请求确认确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 405. After receiving the handover request acknowledgement, the source evolved base station determines, according to the handover request, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

在情况三中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case three, the S-eNB may stop sending the data packet of the UE to the S-RN at least at the following times:

或者也可以是 S-RN发送切换命令时， S-RN即可以将第一个从 S-eNB新接收的但是还没有向 UE发送的数据包的序列号发送给 S-eNB; 当 S-eNB接收到该序列号信息时，即停止向 S-RN发送 UE的数据包。 Alternatively, when the S-RN sends a handover command, the S-RN may send the sequence number of the first data packet newly received from the S-eNB but not yet transmitted to the UE to the S-eNB; When the serial number information is received, the data packet of the UE is stopped from being transmitted to the S-RN.

或者也可以是当 S-eNB接收到后述 S-RN发送的 UE的接收状态报告时停止向 S-RN传输数据。 Or may be stopped when the S-eNB receives the reception status report of the UE sent by the S-RN described later. Stop transmitting data to the S-RN.

步骤 406 ~ 41 1同步骤 306 ~ 31 1。 Steps 406 ~ 41 1 are the same as steps 306 ~ 31 1.

另夕卜， T-eNB还可以在向 S-eNB发送切换请求确认后，向丽 E ( Mob i l i ty Management Ent i ty ,移动性管理实体）发送双播 /多播请求，然后固 E向 S-GW 请求向 S-eNB和 T-eNB双播 /多播发送当前 UE的数据包。 S-GW同意进行双播 / 多播后，向丽 E反馈双播 /多播请求确认。然后，丽 E向 T-eNB反馈双播 /多播请求确认。或者， S-eNB在接收到 T-eNB转发的切换请求确认后，向 MME发送双播 /多播请求，然后 MME向 S-GW请求向 S-eNB和 T-eNB双播 /多播发送当前 UE的数据包。 S-GW同意进行双播 /多播后，向丽 E反馈双播 /多播请求确认。然后， MME向 S-eNB反馈双播 /多播请求确认。 In addition, after transmitting the handover request acknowledgement to the S-eNB, the T-eNB may also send a bi-cast/multicast request to the E-E (Improvement Management Entity), and then fix the E to the S. The GW requests to transmit the current UE's data packet to the S-eNB and the T-eNB bi-cast/multicast. After the S-GW agrees to perform the dual-cast/multicast, it will feedback the dual-homed/multicast request confirmation to the MN. Then, the MN E feeds back the T-eNB to the bi-cast/multicast request acknowledgement. Alternatively, after receiving the handover request acknowledgement forwarded by the T-eNB, the S-eNB sends a bi-cast/multicast request to the MME, and then the MME requests the S-GW to transmit the current to the S-eNB and the T-eNB bi-cast/multicast. UE's data packet. After the S-GW agrees to perform the dual-cast/multicast, it will feedback the dual-cast/multicast request confirmation to the MN. Then, the MME feeds back the dual-homing/multicast request acknowledgement to the S-eNB.

S-GW同意进行双播 /多播后，向 S-eNB和 T-eNB双播 /多播发送 UE的数据包。在步骤 41 1中， S-eNB根据双播 /多播标志确定緩存中由 S-GW单播发送的 UE的数据包，在 RLC确认模式下，向 T-eNB转发未被 UE确认正确接收的由 S-GW单播发送的数据包，在 RLC非确认模式下，向 T-eNB转发 S-RN未向 UE 发送的由 S-GW单播发送的数据包。 After the S-GW agrees to perform the bi-cast/multicast, the S-eNB and the T-eNB bi-cast/multicast transmit the UE data packets. In step 41, the S-eNB determines, according to the bi-cast/multicast flag, the data packet of the UE that is unicastly transmitted by the S-GW in the buffer, and forwards to the T-eNB in the RLC acknowledge mode that the UE does not confirm the correct reception. The data packet unicast by the S-GW forwards the data packet transmitted by the S-GW to the T-eNB and transmitted by the S-GW unicast to the T-eNB in the RLC unacknowledged mode.

S-eNB根据双播 /多播标志确定緩存中由 S-GW单播发送的 UE的数据包的方式有艮多种。举例而言， S-GW可以在每个双播 /多播发送的数据包上添加双播 /多播标志，因此， S-eNB可以确定緩存的该 UE的数据包中不携带双播 /多播标志的数据包，为由 S-GW单播发送的该 UE的数据包。或者， S-GW也可以在第一个双播 /多播发送的数据包上添加双播 /多播标志，因此， S-eNB可以确定緩存的该 UE 的数据包中序列号在携带双播 /多播标志的数据包的序列号之前的数据包，为由 S-GW单播发送的该 UE的数据包。 The S-eNB determines, according to the dual-cast/multicast flag, how many data packets of the UE unicast by the S-GW in the buffer are determined. For example, the S-GW may add a bi-cast/multicast flag on each bi-directional/multicast-transmitted data packet. Therefore, the S-eNB may determine that the buffered UE's data packet does not carry the bi-cast/multiple The data packet of the broadcast flag is a data packet of the UE that is unicastly transmitted by the S-GW. Alternatively, the S-GW may also add a bi-cast/multicast flag on the first bi-cast/multicast-transmitted data packet. Therefore, the S-eNB may determine that the serial number of the buffered UE's data packet carries the dual-cast. The data packet before the sequence number of the multicast/multicast flag is the data packet of the UE that is unicast by the S-GW.

在步骤 403、 405中， S-eNB需要解析切换请求和切换请求确认。另外， S-eNB还可以不解析该切换请求，将该切换请求透传给目标演进基站的目标中继节点。如图 1 1所示，本发明实施例切换处理方法，包括： In steps 403, 405, the S-eNB needs to resolve the handover request and the handover request acknowledgement. In addition, the S-eNB may also not transparently parse the handover request, and transparently transmit the handover request to the target relay node of the target evolved base station. As shown in FIG. 1 , the switching processing method of the embodiment of the present invention includes:

步骤 1 1 01同步骤 401。 11 02、源中继节点向源演进基站发送切换请求，该切换请求包含 UE的上下文信息、目标地址等。举例而言，该切换请求可以通过使用 X2接口的消息方式实现传输，也可以通过采用 RRC消息方式实现传输。 Step 1 1 01 is the same as step 401. 11 02. The source relay node sends a handover request to the source evolved base station, where the handover request includes context information, a target address, and the like of the UE. For example, the handover request may be implemented by using a message mode of the X2 interface, or by using an RRC message mode.

11 03、源演进基站接收该切换请求后，确定切换请求的目标地址不是自己的地址，根据该目标地址将所述切换请求透传给目标演进基站的目标中继节点。 After receiving the handover request, the source evolved base station determines that the target address of the handover request is not its own address, and transparently transmits the handover request to the target relay node of the target evolved base station according to the target address.

11 04、目标中继节点接收该切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标中继节点向源演进基站发送切换请求确认。 11 04. After receiving the handover request, the target relay node performs admission control. If the admission control result is that the user equipment is allowed to access, the target relay node sends a handover request acknowledgement to the source evolved base station.

11 05、源演进基站接收该切换请求确认后，将该切换请求确认透传给源中继节点。 After receiving the handover request acknowledgement, the source evolved base station transparently transmits the handover request acknowledgement to the source relay node.

11 06、源中继节点接收该切换请求确认后，向源演进基站发送切换指示消息。 After receiving the handover request acknowledgement, the source relay node sends a handover indication message to the source evolved base station.

11 07、源演进基站接收所述切换指示消息后，根据所述切换指示消息确定允许用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 After receiving the handover indication message, the source evolved base station determines, according to the handover indication message, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

步骤 1108 ~ 1112同步骤 407 ~ 411。 Steps 1108 to 1112 are the same as steps 407 ~ 411.

情况四、由 S-RN做出 UE切换的决定， UE从 S-RN切换到 S-eNB的 T-RN 如图 5所示，本发明实施例切换处理方法，包括： Case 4: The S-RN makes a UE handover decision, and the UE switches from the S-RN to the T-RN of the S-eNB. As shown in FIG. 5, the handover processing method of the embodiment of the present invention includes:

501、 UE向源中继节点发送测量报告，源中继节点根据测量报告以及其他的无线资源信息做出切换决定，选择源演进基站的目标中继节点为目标节点。 501. The UE sends a measurement report to the source relay node, where the source relay node makes a handover decision according to the measurement report and other radio resource information, and selects the target relay node of the source evolved base station as the target node.

步骤 502同步骤 202。 Step 502 is the same as step 202.

503、源演进基站接收该切换请求后，确定目标节点为源演进基站的目标中继节点，将所述切换请求转发给目标中继节点。 503. After receiving the handover request, the source evolved base station determines that the target node is a target relay node of the source evolved base station, and forwards the handover request to the target relay node.

504、目标中继节点接收源演进基站转发的切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标中继节点向源演进基站发送切换请求确认。 504. After receiving the handover request forwarded by the source evolved base station, the target relay node performs admission control. If the admission control result is that the user equipment is allowed to access, the target relay node sends the source evolved base station to the source evolved base station. Send a switch request confirmation.

505、源演进基站接收该切换请求确认后，根据该切换请求确认确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 505. After receiving the handover request acknowledgement, the source evolved base station determines, according to the handover request, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

在情况四中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case four, the S-eNB may stop transmitting the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN转发切换请求确认后即停止向 S-RN发送该 UE的数据包。或者 S-eNB也可以在接收到 T-RN发送的包含允许 UE接入的切换请求确认时停止向 S-RN发送该 UE的数据包。 When the S-eNB forwards the handover request acknowledgement to the S-RN, it stops sending the data packet of the UE to the S-RN. Alternatively, the S-eNB may stop sending the data packet of the UE to the S-RN when receiving the handover request acknowledgement that the T-RN sends the UE to allow the UE to access.

或者 S-eNB也可以在比向 S-RN转发切换请求确认的时刻提前或滞后一段时间 T时停止向 S-RN发送该 UE的数据包。 Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when it is advanced or delayed by a time T to forward the handover request acknowledgement to the S-RN.

步骤 506 ~ 51 0同步骤 204 ~ 208。 Steps 506 ~ 51 0 are the same as steps 204 ~ 208.

51 1、源演进基站向目标中继节点发送緩存中所述用户设备的数据包，和 /或向所述目标中继节点发送所述用户设备的接收状态消息。 The source evolved base station sends the data packet of the user equipment in the cache to the target relay node, and/or sends the receiving status message of the user equipment to the target relay node.

S-eNB向 T-RN发送 UE的数据包以及 UE的接收状态消息的具体实现方式可以参看步骤 301 , 在此不再贅述。 A specific implementation manner in which the S-eNB sends a data packet of the UE to the T-RN and a reception status message of the UE See step 301, and details are not described herein again.

在步骤 503、 505中， S-eNB需要解析切换请求和切换请求确认。另外， S-eNB还可以不解析该切换请求，将该切换请求透传给目标中继点。如图 1 2 所示，本发明实施例切换处理方法，包括： In steps 503, 505, the S-eNB needs to resolve the handover request and the handover request acknowledgement. In addition, the S-eNB may not transparently parse the handover request, and transparently transmit the handover request to the target relay point. As shown in FIG. 12, the switching processing method of the embodiment of the present invention includes:

步骤 1201同步骤 501。 Step 1201 is the same as step 501.

1202、源中继节点向源演进基站发送切换请求，该切换请求包含 UE的上下文信息、目标地址等。举例而言，该切换请求可以通过使用 X2接口的消息方式实现传输，也可以通过采用 RRC消息方式实现传输。 1202. The source relay node sends a handover request to the source evolved base station, where the handover request includes the UE's context information, a target address, and the like. For example, the handover request may be implemented by using a message mode of the X2 interface, or by using an RRC message.

1203、源演进基站接收该切换请求后，确定切换请求的目标地址不是自己的地址，根据该目标地址将所述切换请求透传给被接入源演进基站的目标中继节点。 1203. After receiving the handover request, the source evolved base station determines that the target address of the handover request is not its own address, and transparently transmits the handover request to the target relay node of the access source evolved base station according to the target address.

步骤 1204同步骤 504。 Step 1204 is the same as step 504.

1205、源演进基站接收该切换请求确认后，将该切换请求确认透传给源中继节点。 1205. After receiving the handover request acknowledgement, the source evolved base station transparently transmits the handover request acknowledgement to the source relay node.

1206、源中继节点接收该切换请求确认后，向源演进基站发送切换指示消息。 1206. After receiving the handover request acknowledgement, the source relay node sends a handover indication message to the source evolved base station.

1207、源演进基站接收所述切换指示消息后，根据所述切换指示消息确定允许用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 After receiving the handover indication message, the source evolved base station determines, according to the handover indication message, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

步骤 1208 ~ 1212同步骤 507 ~ 51 1。 Steps 1208 ~ 1212 are the same as steps 507 ~ 51 1.

情况五、由 S-eNB做出 UE切换的决定， UE从 S-RN切换到 S-eNB 如图 6所示，本发明实施例切换处理方法，包括： Case 5: The S-eNB makes a UE handover decision, and the UE switches from the S-RN to the S-eNB. As shown in FIG. 6, the handover processing method of the embodiment of the present invention includes:

601、用户设备发送测量报告给源中继节点，源中继节点将所述用户设备发送的测量报告转发给源演进基站。举例而言，该测量报告可以通过使用 X2 接口的消息方式转发，也可以通过采用 RRC消息方式转发。 601. The user equipment sends a measurement report to the source relay node, where the source relay node forwards the measurement report sent by the user equipment to the source evolved base station. For example, the measurement report can be forwarded by using the message of the X2 interface, or by using the RRC message.

602、源演进基站接收该测量报告后，根据该测量报告以及其他的无线资源信息做出切换决定，选择自己为目标节点。执行准入控制，若根据所述准入控制结果确定允许所述用户设备接入，则源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 602. After receiving the measurement report, the source evolved base station, according to the measurement report and other wireless resources. The source information makes a switch decision and selects itself as the target node. Performing admission control, if it is determined that the user equipment is allowed to access according to the admission control result, the source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the to the source relay node. The packet of the user device.

在情况五中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 5, the S-eNB may stop sending the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN发送切换命令（或者称之为带有移动性控制信息的 RRC 连接重配置消息 )后即停止向 S-RN发送该 UE的数据包。 When the S-eNB sends a handover command (or RRC connection reconfiguration message with mobility control information) to the S-RN, it stops sending the data packet of the UE to the S-RN.

当 S-eNB在比向 S-RN发送切换命令的时刻提前或滞后一段时间 T时即停止向 S-RN发送该 UE的数据包。 When the S-eNB stops or lags the time T to send the handover command to the S-RN, it stops transmitting the data packet of the UE to the S-RN.

或者 S-eNB也可以在决定允许切换时停止向 S-RN发送该 UE的数据包。或者 S-eNB也可以在比决定允许切换的时刻提前或滞后一段时间 T时停止向 S-RN发送该 UE的数据包。 Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when it decides to allow the handover. Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when it is earlier or later than the time T is determined to allow the handover.

或者也可以是当 S-eNB接收到后述 S-RN发送的 UE的接收状态报告时停止向 S-eNB发送该 UE的数据包。 Alternatively, when the S-eNB receives the reception status report of the UE transmitted by the S-RN, which is described later, the S-eNB stops transmitting the data packet of the UE to the S-eNB.

603、源演进基站向源中继节点发送切换命令。 603. The source evolved base station sends a handover command to the source relay node.

604、源中继节点接收由源演进基站发送的切换命令后，向源演进基站发送所述用户设备的接收状态报告。 S-RN向 S-eNB发送 UE的接收状态 >¾告的具体实现方式可以参考步骤 205 , 在此不再赘述。 604. After receiving the handover command sent by the source evolved base station, the source relay node sends the reception status report of the user equipment to the source evolved base station. For a specific implementation manner in which the S-RN sends the receiving state of the UE to the S-eNB, refer to step 205, and details are not described herein again.

步骤 605 ~ 607同步骤 206 ~ 208。 Steps 605 ~ 607 are the same as steps 206 ~ 208.

情况六、由 S-eNB做出 UE切换的决定， UE从 S-RN切换到 T-eNB 如图 7所示，本发明实施例切换处理方法，包括： Case 6: The S-eNB makes a UE handover decision, and the UE switches from the S-RN to the T-eNB. As shown in FIG. 7, the handover processing method of the embodiment of the present invention includes:

步骤 701同步骤 601。 Step 701 is the same as step 601.

702、源演进基站接收该测量报告后，根据该测量报告以及其他的无线资源信息做出切换决定，选择目标演进基站为目标节点，并向目标演进基站发送切换请求。 702. After receiving the measurement report, the source evolved base station performs a handover decision according to the measurement report and other wireless resource information, selects the target evolved base station as the target node, and sends a handover request to the target evolved base station.

703、目标演进基站接收该切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标演进基站向源演进基站发送切换请求确认。 703. After receiving the handover request, the target evolved base station performs admission control. If the admission control result is that the user equipment is allowed to access, the target evolved base station transmits a handover request acknowledgement to the source evolved base station.

704、源演进基站接收由目标演进基站发送的切换请求确认后，根据所述切换请求确认，确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 704. After receiving the handover request acknowledgement sent by the target evolved base station, the source evolved base station determines, according to the handover request acknowledgement, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops transmitting the data packet of the user equipment to the source relay node.

在情况六中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 6, the S-eNB may stop sending the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN发送切换命令后即停止向 S-RN发送该 UE的数据包。当 S-eNB在比向 S-RN发送切换命令的时刻提前或滞后一段时间 T时即停止向 S-RN发送该 UE的数据包。 When the S-eNB sends a handover command to the S-RN, it stops sending the data packet of the UE to the S-RN. When the S-eNB stops or lags the time T to send the handover command to the S-RN, it stops transmitting the data packet of the UE to the S-RN.

或者也可以是 S-RN发送切换命令时， S-RN即可以将第一个从 S-eNB新接收的但是还没有向 UE发送的数据包的序列号发送给 S-eNB; 当 S-eNB接收到该序列号信息时，即停止向 S-RN发送 UE的数据包。或者 S-RN可以直接向 S-eNB发送一个停止传输请求消息，请求 S-eNB停止向 S-RN传输该 UE的数据。当 S-eNB接收到该消息后即停止传输该 UE的数据给 S-RN。 Alternatively, when the S-RN sends a handover command, the S-RN may send the sequence number of the first data packet newly received from the S-eNB but not yet transmitted to the UE to the S-eNB; When the serial number information is received, the data packet of the UE is stopped from being transmitted to the S-RN. Or the S-RN may directly send a stop transmission request message to the S-eNB, requesting the S-eNB to stop transmitting data of the UE to the S-RN. When the S-eNB receives the message, it stops transmitting the data of the UE to the S-RN.

步骤 705 ~ 706同步骤 603 ~ 604。 Steps 705 ~ 706 are the same as steps 603 ~ 604.

步骤 707 ~ 71 0同步骤 308 ~ 31 1。 Steps 707 ~ 71 0 are the same as steps 308 ~ 31 1.

情况七、由 S-eNB做出 UE切换的决定， UE从 S-RN切换到 T-eNB的 T-RN 如图 8所示，本发明实施例切换处理方法，包括： In the seventh embodiment, the S-eNB determines the UE handover, and the UE switches from the S-RN to the T-RN of the T-eNB. As shown in FIG. 8, the handover processing method of the embodiment of the present invention includes:

步骤 801同步骤 601。 Step 801 is the same as step 601.

802、源演进基站接收该测量报告后，根据该测量报告以及其他的无线资源信息做出切换决定，选择目标演进基站的目标中继节点为目标节点，并向目标演进基站发送切换请求，目标演进基站将该切换请求转发给目标中继节点。 802. After receiving the measurement report, the source evolved base station performs a handover decision according to the measurement report and other radio resource information, selects a target relay node of the target evolved base station as a target node, and sends a handover request to the target evolved base station, and the target evolves. The base station forwards the handover request to the target relay node.

803、目标中继节点接收目标演进基站转发的切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标中继节点向目标演进基站发送切换请求确认，目标演进基站将该切换请求确认转发给源演进基站。 803. After receiving the handover request forwarded by the target evolved base station, the target relay node performs admission control. If the admission control result is that the user equipment is allowed to access, the target relay node sends a handover request acknowledgement to the target evolved base station, and the target evolved base station forwards the handover request acknowledgement to the source evolved base station.

804、源演进基站接收该切换请求确认后，根据该切换请求确认确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述源中继节点发送所述用户设备的数据包。 804. After receiving the handover request acknowledgement, the source evolved base station determines, according to the handover request, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the source relay node.

在情况七中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 7, the S-eNB may stop sending the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN发送切换命令后即停止向 S-RN发送该 UE的数据包。当 S-eNB在比向 S-RN发送切换命令的时刻提前或滞后一段时间 T时即停止向 S-RN发送该 UE的数据包。 When the S-eNB sends a handover command to the S-RN, it stops sending the data packet of the UE to the S-RN. When the S-eNB stops or lags the time T before the handover command is sent to the S-RN, the data packet of the UE is stopped from being sent to the S-RN.

步骤 805 ~ 806同步骤 603 ~ 604。 Steps 805 ~ 806 are the same as steps 603 ~ 604.

步骤 807 ~ 81 0同步骤 408 ~ 41 1。 Steps 807 ~ 81 0 with steps 408 ~ 41 1.

另外，还可以 T-eNB在向 S-eNB发送切换请求确认后 ,通过 MME请求 S-GW 向 S-eNB和 T-eNB双播 /多播发送 UE的数据包，或者，也可以 S-eNB在接收由 T-eNB发送的切换请求确认后，通过 MME请求 S-GW向 S-eNB和 T-eNB双播 /多播发送 UE的数据包。 S-eNB向 T-eNB转发未被 UE确认正确接收的，或者 S-RN未向 UE发送的由 S-GW单播发送的数据包。具体实现方式在情况三中已进行详细描述，因此不再贅述。 In addition, after the T-eNB sends the handover request acknowledgement to the S-eNB, the MME requests the S-GW to transmit the UE data packet to the S-eNB and the T-eNB by using the S-eNB, or may also be the S-eNB. After receiving the handover request acknowledgement sent by the T-eNB, the MME requests the S-GW to transmit the UE's data packet to the S-eNB and the T-eNB in a bi-cast/multicast manner. The S-eNB forwards the data packet sent by the S-GW unicast to the T-eNB, which is not correctly received by the UE, or transmitted by the S-RN to the UE. The specific implementation has been described in detail in case three, and therefore will not be described again.

情况八、由 S-eNB做出 UE切换的决定， UE从 S-RN切换到 S-eNB的 T-RN 如图 9所示，本发明实施例切换处理方法，包括：步骤 901同步骤 601。 Case 8: The S-eNB makes a UE handover decision, and the UE switches from the S-RN to the S-eNB T-RN. As shown in FIG. 9, the handover processing method of the embodiment of the present invention includes: Step 901 is the same as step 601.

902、源演进基站接收该测量报告后，根据该测量报告以及其他的无线资源信息做出切换决定，选择源演进基站的目标中继节点为目标节点，并向目标中继节点发送切换请求。 902. After receiving the measurement report, the source evolved base station performs a handover decision according to the measurement report and other wireless resource information, selects a target relay node of the source evolved base station as a target node, and sends a handover request to the target relay node.

903、目标中继节点接收源演进基站发送的切换请求后，执行准入控制。如果准入控制结果为允许该用户设备接入，则目标中继节点向源演进基站发送切换请求确认。 903. After receiving the handover request sent by the source evolved base station, the target relay node performs admission control. If the admission control result is that the user equipment is allowed to access, the target relay node sends a handover request acknowledgement to the source evolved base station.

904、源演进基站接收该切换请求确认后，根据该切换请求确认确定允许所述用户设备接入。源演进基站停止清除緩存中所述用户设备的数据包，并且停止向所述 S-eNB发送所述用户设备的数据包。 904. After receiving the handover request acknowledgement, the source evolved base station determines, according to the handover request, that the user equipment is allowed to access. The source evolved base station stops clearing the data packet of the user equipment in the cache, and stops sending the data packet of the user equipment to the S-eNB.

在情况八中， S-eNB至少可以在以下几种时刻停止向 S-RN发送所述 UE的数据包： In case 8, the S-eNB may stop transmitting the data packet of the UE to the S-RN at least at the following times:

当 S-eNB向 S-RN发送切换命令后即停止向 S-RN发送该 UE的数据包。或者 S-eNB也可以在比向 S-RN发送切换命令的时刻提前或滞后一段时间 T时停止向 S-RN发送该 UE的数据包。 When the S-eNB sends a handover command to the S-RN, it stops sending the data packet of the UE to the S-RN. Alternatively, the S-eNB may stop transmitting the data packet of the UE to the S-RN when it is earlier or later than the time when the handover command is sent to the S-RN.

或者也可以是当 S-eNB接收到后述 S-RN发送的 UE的接收状态报告时停止向 S-RN发送该 UE的数据包。步骤 905 ~ 906同步骤 603 ~ 604。 Alternatively, when the S-eNB receives the reception status report of the UE transmitted by the S-RN described later, the S-eNB may stop transmitting the data packet of the UE to the S-RN. Steps 905 ~ 906 are the same as steps 603 ~ 604.

步骤 907 ~ 910同步骤 508 ~ 511。 Steps 907 ~ 910 are the same as steps 508 ~ 511.

另外，在处于情况三、情况七下，通过源演进基站或目标演进基站请求 S-GW双播 /多播发送当前的用户设备的数据包，使目标演进基站可以直接从 S-GW接收当前的用户设备的数据包，将该数据包转发给目标中继节点，不仅减小了数据传输的时延，还使目标演进基站更容易对数据包进行排序。 In addition, in case 3, case 7, the source evolved base station or the target evolved base station requests the S-GW to multicast/multicast the data packet of the current user equipment, so that the target evolved base station can directly receive the current data from the S-GW. The data packet of the user equipment forwards the data packet to the target relay node, which not only reduces the delay of data transmission, but also makes it easier for the target evolved base station to sort the data packets.

与上述方法相应地，本发明实施例还提供了一种切换处理方法，如图 13 所示，本发明实施例切换处理方法，包括： Corresponding to the foregoing method, the embodiment of the present invention further provides a handover processing method. As shown in FIG. 13, the handover processing method of the embodiment of the present invention includes:

1301、源中继节点向源演进基站发送用户设备的接收状态信息； 1301. The source relay node sends the receiving state information of the user equipment to the source evolved base station.

1302、源中继节点在接收由所述源演进基站发送的丟包消息时，根据所述丟包消息向所述源演进基站发送丟失的数据包。 1302: The source relay node sends the lost data packet to the source evolved base station according to the packet loss message when receiving the packet loss message sent by the source evolved base station.

本发明实施例提供的切换处理方法，源中继节点将用户设备的接收状态信息发送给源演进基站，使源演进基站在停止清除緩存中所述用户设备的数据包后，可以根据用户设备的接收状态信息确定是否存在丟失数据包，源中继节点根据源演进基站发送的丟包消息向源演进基站发送数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 According to the handover processing method provided by the embodiment of the present invention, the source relay node sends the receiving state information of the user equipment to the source evolved base station, so that the source evolved base station can clear the cached data packet of the user equipment in the cache, according to the user equipment. The receiving status information determines whether there is a lost data packet, and the source relay node sends a data packet to the source evolved base station according to the packet loss message sent by the source evolved base station, thereby reducing the possibility that the source evolved base station loses the data packet during the handover process, and reducing the source relay node back. The number of cleared packets transmitted to the source evolved base station saves radio resources.

与上述方法相对应地，本发明提供了一种基站，如图 14所示，本发明实施例基站，包括：切换确定单元 1401 , 用于确定用户设备是否需要切换； Corresponding to the above method, the present invention provides a base station. As shown in FIG. 14, the base station of the embodiment of the present invention includes: a handover determining unit 1401, configured to determine whether the user equipment needs to be switched;

停止清除单元 1402 ,用于在所述切换确定单元 1401确定所述用户设备需要切换时，或在所述切换确定单元 1401确定所述用户设备需要切换后的指定时刻，停止清除緩存中所述用户设备的数据包； The stop clearing unit 1402 is configured to stop clearing the user in the cache when the handover determining unit 1401 determines that the user equipment needs to be switched, or after the handover determining unit 1401 determines that the user equipment needs to be switched. Packet of the device;

信息获取单元 1403 , 用于从源中继节点获取所述用户设备的接收状态信息； The information acquiring unit 1403 is configured to acquire, by the source relay node, the receiving status information of the user equipment.

丟失数据确定单元 1404 ,用于根据所述信息获取单元 1403获取的接收状态信息确定是否存在丟失的数据包； The lost data determining unit 1404 is configured to determine, according to the received status information acquired by the information acquiring unit 1403, whether there is a lost data packet;

丟失数据获取单元 1405 ,用于在所述丟失数据确定单元 1404确定存在丟失的数据包时，根据所述信息获取单元 1403获取的接收状态信息从所述源中继节点获取所述丟失的数据包。 The lost data obtaining unit 1405 is configured to: when the lost data determining unit 1404 determines that there is a lost data packet, acquire the lost data packet from the source relay node according to the receiving state information acquired by the information acquiring unit 1403. .

进一步地，所述切换确定单元 1401具体包括： Further, the handover determining unit 1401 specifically includes:

切换请求接收子单元，用于接收由所述源中继节点发送的切换请求；切换请求判断子单元，用于根据所述切换请求接收子单元接收的切换请求确定所述用户设备需要切换； a handover request receiving subunit, configured to receive a handover request sent by the source relay node, and a handover request determination subunit, configured to determine, according to the handover request received by the handover request receiving subunit, that the user equipment needs to be switched;

或者，所述切换确定单元 1401具体包括： Alternatively, the handover determining unit 1401 specifically includes:

测量报告接收子单元，用于接收由所述源中继节点发送的所述用户设备的测量报告； a measurement report receiving subunit, configured to receive a measurement report of the user equipment sent by the source relay node;

测量报告判断子单元，用于根据所述测量报告接收子单元接收的测量报告确定所述用户设备需要切换。 And a measurement report determining subunit, configured to determine, according to the measurement report received by the measurement report receiving subunit, that the user equipment needs to be switched.

进一步地，所述信息获取单元 1403包括： Further, the information acquiring unit 1403 includes:

状态报告接收子单元，用于接收由所述源中继节点发送的接收状态报告；状态信息获取子单元，用于从所述状态报告接收子单元接收的接收状态报告中获取所述用户设备的接收状态信息。 a status report receiving subunit, configured to receive a receiving status report sent by the source relay node, and a status information acquiring subunit, configured to obtain the user equipment from a receiving status report received by the status report receiving subunit Receive status information.

进一步地，所述丟失数据获取单元 1405包括： Further, the lost data acquiring unit 1405 includes:

丟失数据确定子单元，用于根据所述接收状态信息确定丟失的数据包；丟包消息发送子单元，用于向所述源中继节点发送丟包消息，所述丟包消息携带所述丟失数据确定子单元确定的丟失的数据包的序列号； a lost data determining subunit, configured to determine a lost data packet according to the received state information; a packet loss sending sub-unit, configured to send a packet loss message to the source relay node, where the packet loss message carries a sequence number of the lost data packet determined by the lost data determining subunit;

丟失数据接收子单元，用于接收由所述源中继节点发送的所述丟失的数据包。 And a lost data receiving subunit, configured to receive the lost data packet sent by the source relay node.

进一步地，所述基站还包括： Further, the base station further includes:

多余数据确定单元，用于根据所述信息获取单元获取的接收状态信息确定是否存在多余的数据包； a redundant data determining unit, configured to determine, according to the receiving status information acquired by the information acquiring unit, whether there is an excess data packet;

緩存清除单元，用于在所述多余数据确定单元确定存在多余的数据包时，根据所述信息获取单元获取的接收状态信息清除緩存中所述多余的数据包。 a cache clearing unit, configured to: when the redundant data determining unit determines that there is a redundant data packet, clear the redundant data packet in the cache according to the received state information acquired by the information acquiring unit.

数据传输单元，用于根据所述信息获取单元获取的接收状态信息向目标节点发送所述用户设备的数据包； a data transmission unit, configured to send, according to the received status information acquired by the information acquiring unit, a data packet of the user equipment to a target node;

状态消息发送单元，用于根据所述信息获取单元获取的接收状态信息向所述目标节点发送所述用户设备的接收状态消息。 The status message sending unit is configured to send the receiving status message of the user equipment to the target node according to the receiving status information acquired by the information acquiring unit.

进一步地，所述基站还包括传输请求接收单元，用于接收由所述目标节点发送的数据传输请求。所述基站的数据传输单元和状态消息发送单元可以根据所述传输请求接收单元接收的数据传输请求，分别向目标节点发送所述用户设备的数据包以及所述用户设备的接收状态消息。 Further, the base station further includes a transmission request receiving unit, configured to receive a data transmission request sent by the target node. The data transmission unit and the status message sending unit of the base station may send the data packet of the user equipment and the reception status message of the user equipment to the target node according to the data transmission request received by the transmission request receiving unit.

进一步地，所述数据传输单元具体包括： Further, the data transmission unit specifically includes:

单播数据确定子单元，用于根据双播 /多播标志确定单播发送数据包；传输数据子单元，用于根据所述信息获取单元获取的接收状态信息向所述目标节点发送未被所述用户设备确认正确接收或未向所述用户设备发送的单播发送数据包。 a unicast data determining subunit, configured to determine a unicast sending data packet according to the bi-cast/multicast flag, and a transport data sub-unit, configured to send, to the target node, the unsuccessful according to the received state information acquired by the information acquiring unit The user equipment confirms that the unicast transmission data packet is correctly received or not sent to the user equipment.

发送请求发送单元，用于通过移动性管理实体向服务网关发送双播 /多播请求，所述双播 /多播请求用于请求所述服务网关向目标演进基站和源演进基站双播 /多播发送数据包； And a sending request sending unit, configured to send a bi-cast/multicast request to the serving gateway by using the mobility management entity, where the dual-homing/multicast request is used to request the serving gateway to evolve to the target eNodeB and the source eNodeB Station bi-cast/multicast transmission of data packets;

发送确认接收单元，用于接收由所述移动性管理实体转发的双播 /多播请求确认； And a sending acknowledgement receiving unit, configured to receive a dual broadcast/multicast request acknowledgement forwarded by the mobility management entity;

新数据接收单元，用于接收由所述服务网关双播 /多播发送的数据包。本发明实施例提供的基站，通过在确定用户设备需要切换时，或者在确定所述用户设备需要切换后的指定时刻，停止清除緩存中被源中继节点接收的所述用户设备的数据包，并从源中继节点获取所述用户设备的接收状态信息，在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取丟失的数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 a new data receiving unit, configured to receive a data packet sent by the service gateway in dual/multicast. The base station provided by the embodiment of the present invention stops the clearing of the data packet of the user equipment received by the source relay node in the cache when determining that the user equipment needs to be switched, or after determining that the user equipment needs to be switched. Obtaining, by the source relay node, the receiving status information of the user equipment, and when determining that there is a lost data packet according to the receiving status information, acquiring the lost data packet from the source relay node according to the receiving status information, The possibility that the source evolved base station loses data packets during the handover process is reduced, and the number of cleared data packets returned by the source relay node to the source evolved base station is reduced, thereby saving radio resources.

与上述装置相对应地，本发明实施例还提供了一种中继节点，如图 15所示，本发明实施例中继节点，包括： Corresponding to the foregoing apparatus, the embodiment of the present invention further provides a relay node. As shown in FIG. 15, the relay node of the embodiment of the present invention includes:

状态信息发送单元 1501 , 用于向源演进基站发送用户设备的接收状态信息； The status information sending unit 1501 is configured to send, to the source evolved base station, the receiving status information of the user equipment.

丟包消息接收单元 1502 , 用于接收由所述源演进基站发送的丟包消息；丟失数据发送单元 1503 ,用于在所述丟包消息接收单元 1502接收丟包消息时，根据所述丟包消息向所述源演进基站发送丟失的数据包。 The packet loss receiving unit 1502 is configured to receive a packet loss message sent by the source evolved base station, and the lost data sending unit 1503 is configured to: when the packet loss message receiving unit 1502 receives the packet loss message, according to the packet loss The message sends the lost data packet to the source evolved base station.

进一步地，所述中继节点还包括： Further, the relay node further includes:

切换请求发送单元，用于向所述源演进基站发送切换请求； a handover request sending unit, configured to send a handover request to the source evolved base station;

指示消息发送单元，用于向所述源演进基站发送切换指示消息；切换确认接收单元，用于接收由所述源演进基站发送的切换请求确认。或者，所述中继节点还包括： And an indication message sending unit, configured to send a handover indication message to the source evolved base station, and a handover acknowledgement receiving unit, configured to receive a handover request acknowledgement sent by the source evolved base station. Or the relay node further includes:

测量报告发送单元，用于向所述源演进基站发送所述用户设备的测量报告. a measurement report sending unit, configured to send the measurement report of the user equipment to the source evolved base station.

切换命令接收单元，用于接收由所述源演进基站发送的切换命令。进一步地，所述丟失数据发送单元 1503具体还包括： And a handover command receiving unit, configured to receive a handover command sent by the source evolved base station. Further, the lost data sending unit 1503 specifically includes:

序号获取子单元，用于从所述丟包消息接收子单元接收的丟包消息中获取丟失的数据包的序列号； a sequence number obtaining subunit, configured to obtain a sequence number of the lost data packet from the packet loss message received by the packet loss message receiving subunit;

丟失数据发送子单元，用于根据所述序号获取子单元获取的序列号向所述源演进基站发送所述丟失的数据包。 And a lost data sending subunit, configured to send the lost data packet to the source evolved base station according to the sequence number obtained by the sequence number obtaining subunit.

本发明实施例提供的中继节点，将用户设备的接收状态信息发送给源演进基站，使源演进基站在停止清除緩存中所述用户设备的数据包后，可以根据用户设备的接收状态信息确定是否存在丟失数据包，所述中继节点根据源演进基站发送的丟包消息向源演进基站发送数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 The relay node provided by the embodiment of the present invention sends the receiving state information of the user equipment to the source evolved base station, so that after the source evolved base station stops clearing the data packet of the user equipment in the cache, the source evolved base station may determine according to the receiving state information of the user equipment. Whether there is a lost data packet, the relay node sends a data packet to the source evolved base station according to the packet loss message sent by the source evolved base station, which reduces the possibility that the source evolved base station loses the data packet during the handover process, and reduces the source relay node back to the source. The number of cleared packets of the evolved base station saves radio resources.

与上述方法、装置相对应地，本发明实施例还提供了一种切换处理***，如图 16所示，本发明实施例切换处理***，包括演进基站和中继节点：所述演进基站与至少一个中继节点连接；所述演进基站包括源演进基站 1602和目标演进基站 1603; 所述中继节点包括源中继节点 1601和目标中继节点 1604 ; 其中，所述源演进基站 1602 , 用于在确定用户设备需要切换时，或者在确定所述用户设备需要切换后的指定时刻，停止清除緩存中所述用户设备的数据包；并从所述源中继节点 1601获取所述用户设备的接收状态信息；在根据所述接收状态信息确定存在丟失的数据包时，根据接收状态信息从所述源中继节点 1601获取所述丟失的数据包； Corresponding to the foregoing method and apparatus, the embodiment of the present invention further provides a handover processing system. As shown in FIG. 16, the handover processing system of the embodiment of the present invention includes an evolved base station and a relay node: the evolved base station and at least a relay node is connected; the evolved base station includes a source evolved base station 1602 and a target evolved base station 1603; the relay node includes a source relay node 1601 and a target relay node 1604; wherein the source evolved base station 1602 is configured to When it is determined that the user equipment needs to be switched, or after determining that the user equipment needs to be switched, the data packet of the user equipment in the cache is stopped; and the receiving of the user equipment is obtained from the source relay node 1601. Status information; when it is determined that there is a lost data packet according to the received status information, acquiring the lost data packet from the source relay node 1601 according to the received status information;

所述源中继节点 1601 ,用于向源演进基站 1602发送用户设备的接收状态信息；并根据所述源演进基站 1602的丟包消息向所述源演进基站 1602发送丟失的数据包。 The source relay node 1601 is configured to send the receiving state information of the user equipment to the source evolved base station 1602; and send the lost data packet to the source evolved base station 1602 according to the packet loss message of the source evolved base station 1602.

进一步地，所述源演进基站 1602 , 还用于根据所述接收状态信息向所述目标演进基站 1603或所述目标中继节点 1604发送所述用户设备的数据包和 / 或所述用户设备的接收状态消息；所述目标演进基站 1603 ,用于接收由所述源演进基站 1602发送的所述用户设备的数据包和 /或所述用户设备的接收状态消息； Further, the source evolved base station 1602 is further configured to send, according to the received state information, the data packet of the user equipment and/or the user equipment to the target evolved base station 1603 or the target relay node 1604. Receiving a status message; The target evolved base station 1603 is configured to receive a data packet of the user equipment and/or a receiving status message of the user equipment sent by the source evolved base station 1602;

所述目标中继节点 1604 ,用于接收由所述源演进基站 1603发送的所述用户设备的数据包和 /或所述用户设备的接收状态消息。 The target relay node 1604 is configured to receive a data packet of the user equipment and/or a receiving status message of the user equipment sent by the source evolved base station 1603.

本发明实施例提供的切换处理***，通过源演进基站在确定用户设备需要切换时，或者在确定所述用户设备需要切换后的指定时刻，停止清除緩存中被源中继节点接收的所述用户设备的数据包，并从源中继节点获取所述用户设备的接收状态信息，在根据所述接收状态信息确定存在丟失的数据包时，根据所述接收状态信息从所述源中继节点获取丟失的数据包，降低切换过程中源演进基站丟失数据包的可能，减少源中继节点回传给源演进基站的已清除数据包数量，节约无线资源。 The switching processing system provided by the embodiment of the present invention stops the clearing of the user that is received by the source relay node in the cache when the source evolved base station determines that the user equipment needs to be switched, or after determining that the user equipment needs to be switched. a data packet of the device, and acquiring, by the source relay node, the receiving state information of the user equipment, and when determining that there is a lost data packet according to the receiving state information, acquiring, according to the receiving state information, the source relay node The lost data packet reduces the possibility of the source evolved base station losing data packets during the handover process, reduces the number of cleared data packets returned by the source relay node to the source evolved base station, and saves radio resources.

本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（ Read-Only Memory, ROM )或随机存储记忆体 ( Random Acces s Memory, RAM )等。 A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or a Random Acces s Memory (RAM).

以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

权利要求书 Claim

1、一种切换处理方法，其特征在于，包括： A switching processing method, comprising:

从源中继节点获取所述用户设备的接收状态信息； Obtaining, by the source relay node, the receiving status information of the user equipment;

2、根据权利要求 1所述的切换处理方法，其特征在于，确定所述用户设备需要切换包括： 2. The handover processing method according to claim 1, wherein determining that the user equipment needs to be handed over comprises:

接收由所述源中继节点发送的切换请求，并根据所述切换请求确定所述用户设备需要切换；或者， Receiving a handover request sent by the source relay node, and determining, according to the handover request, that the user equipment needs to be switched; or

接收由所述源中继节点发送的所述用户设备的测量报告，并根据所述测量报告确定所述用户设备需要切换。 Receiving a measurement report of the user equipment sent by the source relay node, and determining, according to the measurement report, that the user equipment needs to switch.

3、根据权利要求 1所述的切换处理方法，其特征在于，所述确定所述用户设备需要切换后的指定时刻为： The handover processing method according to claim 1, wherein the determining the specified time after the user equipment needs to be switched is:

确定所述用户设备需要切换的时刻到确定所述用户设备被允许切换的时刻之间的任一时刻，或者，确定所述用户设备被允许切换的时刻，或者，确定所述用户设备需要切换的时刻到停止向所述源中继节点发送所述用户设备的数据包的时刻之间的任一时刻，或者，停止向所述源中继节点发送所述用户设备的数据包的时刻； Determining, at any time between the time when the user equipment needs to be switched, the time when the user equipment is allowed to be switched, or determining the time when the user equipment is allowed to switch, or determining that the user equipment needs to be switched. At any time between the time when the data packet of the user equipment is sent to the source relay node, or the time when the data packet of the user equipment is sent to the source relay node is stopped;

所述停止向所述源中继节点发送所述用户设备的数据包的时刻为：确定所述用户设备被允许切换的时刻，或者，向所述源中继节点发送切换请求确认或切换命令的时刻，或者，确定所述用户设备被允许切换的时刻到向所述源中继节点发送切换请求确认或切换命令的时刻之间的时刻，或者，接收所述接收状态报告的时刻；或者，向所述源中继节点发送切换请求确认或切换命令的时刻到接收所述接收状态报告的时刻之间的时刻。 The moment of stopping the sending of the data packet of the user equipment to the source relay node is: determining a time when the user equipment is allowed to be handed over, or sending a handover request confirmation or a handover command to the source relay node. a time, or a time between when the user equipment is allowed to switch, a time when the handover request acknowledgement or the handover command is sent to the source relay node, or a time when the reception status report is received; or The time between the time when the source relay node transmits the handover request acknowledgement or the handover command to the time when the reception status report is received.

4、根据权利要求 3所述的切换处理方法，其特征在于，确定所述用户设备被允许切换包括： The handover processing method according to claim 3, wherein determining that the user equipment is allowed to switch comprises:

根据执行的准入控制结果确定所述用户设备被允许切换；或者， Determining that the user equipment is allowed to switch according to the performed admission control result; or

接收由目标节点发送的切换请求确认，并根据所述切换请求确认确定所述用户设备被允许切换；或者， Receiving a handover request acknowledgement sent by the target node, and determining, according to the handover request acknowledgement, that the user equipment is allowed to switch; or

接收由所述源中继节点发送的切换指示消息，并根据所述切换指示消息确定所述用户设备被允许切换。 Receiving a handover indication message sent by the source relay node, and determining, according to the handover indication message, that the user equipment is allowed to switch.

5、根据权利要求 1所述的切换处理方法，其特征在于，所述从所述源中继节点获取所述用户设备的接收状态信息包括： The method for processing handover according to claim 1, wherein the obtaining, by the source relay node, the reception status information of the user equipment comprises:

接收由所述源中继节点发送的接收状态报告； Receiving a reception status report sent by the source relay node;

从所述接收状态报告中获取所述用户设备的接收状态信息。 Obtaining the receiving status information of the user equipment from the receiving status report.

6、根据权利要求 1所述的切换处理方法，其特征在于，所述根据所述接收状态信息从所述源中继节点获取所述丟失的数据包包括： The handover processing method according to claim 1, wherein the acquiring the lost data packet from the source relay node according to the receiving status information comprises:

根据所述接收状态信息确定丟失的数据包； Determining a lost data packet according to the receiving status information;

向所述源中继节点发送丟包消息 , 所述丟包消息携带所述确定的丟失的数据包的序列号； Sending a packet loss message to the source relay node, where the packet loss message carries a sequence number of the determined lost data packet;

接收由所述源中继节点发送的所述丟失的数据包。 Receiving the lost data packet transmitted by the source relay node.

7、根据权利要求 1或 2或 3或 6或 7所述的切换处理方法，其特征在于，所述接收状态信息包括： The handover processing method according to claim 1 or 2 or 3 or 6 or 7, wherein the receiving status information comprises:

所述源中继节点最后发送的一个或多个新的数据包的序列号，和未被所述用户设备确认正确接收的数据包的序列号；或者， a sequence number of one or more new data packets finally sent by the source relay node, and a sequence number of the data packet that is not correctly received by the user equipment; or

所述源中继节点最先未发送的一个或多个新的数据包的序列号，和未被所述用户设备确认正确接收的数据包的序列号；或者， a sequence number of one or more new data packets that are not previously sent by the source relay node, and a sequence number of a data packet that is not correctly received by the user equipment; or

所述源中继节点最后发送的一个或多个新的数据包的序列号；或者，所述源中继节点最先未发送的一个或多个新的数据包的序列号； a sequence number of one or more new data packets finally sent by the source relay node; or a sequence number of one or more new data packets that are not sent by the source relay node first;

所述根据所述接收状态信息确定丟失的数据包包括：根据所述未被所述用户设备确认正确接收的数据包的序列号以及緩存中所述用户设备的数据包的序列号，确定緩存中不存在的未被所述用户设备确认正确接收的数据包，将所述确定的未被所述用户设备确认正确接收的数据包作为丟失的数据包；或者， The determining, according to the receiving status information, that the lost data packet includes: Determining, according to the sequence number of the data packet that is not correctly received by the user equipment and the sequence number of the data packet of the user equipment in the cache, determining a data packet that is not in the cache and is not correctly received by the user equipment. And determining the determined data packet that is not correctly received by the user equipment as a lost data packet; or

根据所述最后发送的新的数据包的序列号，以及緩存的所述用户设备的数据包的序列号，确定序列号在所述最后发送的新的数据包的序列号与最先緩存的数据包的序列号之间的数据包，将所述确定的数据包作为丟失的数据包；或者， Determining a sequence number of the last transmitted new data packet and the first cached data according to the sequence number of the last transmitted new data packet and the sequence number of the buffered user equipment data packet a data packet between the serial numbers of the packets, and the determined data packet is regarded as a lost data packet; or

根据所述最先未发送的新的数据包的序列号，以及緩存的所述用户设备的数据包的序列号，确定序列号为所述最先未发送的新的数据包的序列号或在所述最先未发送的新的数据包的序列号与最先緩存的数据包的序列号之间的序列号的数据包，将所述确定的数据包作为丟失的数据包。 Determining, according to the sequence number of the first unsent new packet, and the sequence number of the buffer of the user equipment, determining the serial number of the new packet that is not sent first or The data packet of the sequence number between the sequence number of the first packet that is not sent first and the sequence number of the first buffered data packet, and the determined data packet is regarded as a lost data packet.

8、根据权利要求 1所述的切换处理方法，其特征在于，还包括：在根据所述接收状态信息确定存在多余的数据包时，根据所述接收状态信息清除緩存中所述多余的数据包。 The handover processing method according to claim 1, further comprising: when determining that there is an excess data packet according to the reception state information, clearing the redundant data packet in the cache according to the reception state information .

9、根据权利要求 1所述的切换处理方法，其特征在于，还包括：根据所述接收状态信息向所述目标节点发送所述用户设备的数据包和 /或所述用户设备的接收状态消息，所述接收状态消息为所述源中继节点发送的所述用户设备的接收状态报告，或者，所述接收状态消息携带所述源中继节点最后发送的一个或多个新的数据包的序列号或最先未发送的一个或多个新的数据包的序列号。 The handover processing method according to claim 1, further comprising: transmitting the data packet of the user equipment and/or the reception status message of the user equipment to the target node according to the reception status information. The receiving status message is a receiving status report of the user equipment sent by the source relay node, or the receiving status message carries one or more new data packets that are sent by the source relay node last. The serial number or the serial number of one or more new packets that were not sent first.

10、根据权利要求 1所述的切换处理方法，其特征在于，还包括：通过移动性管理实体向服务网关发送双播 /多播请求，所述双播 /多播请求用于请求所述服务网关向目标演进基站和源演进基站双播 /多播发送数据包；接收由所述移动性管理实体转发的双播 /多播请求确认； 10. The handover processing method according to claim 1, further comprising: transmitting a bi-cast/multicast request to the serving gateway by the mobility management entity, the bi-cast/multicast request for requesting the service Transmitting, by the gateway, a data packet to the target evolved base station and the source evolved base station: receiving a dual-homed/multicast request acknowledgement forwarded by the mobility management entity;

接收由所述服务网关双播 /多播发送的数据包；根据双播 /多播标志确定单播发送数据包； Receiving a data packet sent by the service gateway in dual/multicast; Determining a unicast transmission data packet according to the bi-cast/multicast flag;

根据所述接收状态信息，向所述目标节点发送未被所述用户设备确认正确接收或未向所述用户设备发送的单播发送数据包，和 /或向所述目标节点发送所述用户设备的接收状态消息，所述接收状态消息为所述源中继节点发送的所述用户设备的接收状态报告，或者，所述接收状态消息携带所述源中继节点最后发送的一个或多个新的数据包的序列号或最先未发送的一个或多个新的数据包的序列号。 Transmitting, according to the receiving status information, a unicast sending data packet that is not correctly received by the user equipment or not sent to the user equipment, and/or sending the user equipment to the target node a receiving status message, the receiving status message is a receiving status report of the user equipment sent by the source relay node, or the receiving status message carries one or more new ones sent by the source relay node. The serial number of the packet or the sequence number of one or more new packets that were not sent first.

11、根据权利要求 1 所述的切换处理方法，其特征在于，所述数据包为分制业务数据单元或无线链路控制协议数据单元； The handover processing method according to claim 1, wherein the data packet is a split service data unit or a radio link control protocol data unit;

所述数据包的序列号为分组数据汇聚协议业务数据单元序列号或分组数据汇聚协议协议数据单元序列号或无线链路控制业务数据单元序列号或无线链路控制协议数据单元序列号。 The sequence number of the data packet is a packet data convergence protocol service data unit sequence number or a packet data convergence protocol protocol data unit sequence number or a radio link control service data unit sequence number or a radio link control protocol data unit sequence number.

12、一种切换处理方法，其特征在于，包括： 12. A handover processing method, comprising:

在接收由所述源演进基站发送的丟包消息时，根据所述丟包消息向所述源演进基站发送丟失的数据包。 And receiving, when receiving the packet loss message sent by the source evolved base station, transmitting the lost data packet to the source evolved base station according to the packet loss message.

13、根据权利要求 12所述的切换处理方法，其特征在于，所述向源演进基站发送用户设备的接收状态信息的步骤之前包括： The handover processing method according to claim 12, wherein the step of transmitting the reception status information of the user equipment to the source evolved base station comprises:

向所述源演进基站发送切换请求；或者， Transmitting a handover request to the source evolved base station; or

向所述源演进基站发送切换请求，在接收由所述源演进基站发送的切换请求确认后，向所述源演进基站发送切换指示消息；或者， Sending a handover request to the source evolved base station, and after receiving the handover request acknowledgement sent by the source evolved base station, sending a handover indication message to the source evolved base station; or

向所述源演进基站发送所述用户设备的测量报告，并接收由所述源演进基站发送的切换命令。 Transmitting, by the source evolved base station, a measurement report of the user equipment, and receiving a handover command sent by the source evolved base station.

14、根据权利要求 12所述的切换处理方法，其特征在于，所述向源演进基站发送接收状态信息包括：向所述源演进基站发送接收状态报告，所述接收状态报告携带所述用户设备的接收状态信息；或者， The handover processing method according to claim 12, wherein the transmitting the reception status information to the source evolved base station comprises: Sending a reception status report to the source evolved base station, where the reception status report carries the reception status information of the user equipment; or

向所述源演进基站发送切换请求，所述切换请求消息携带所述用户设备的接收状态信息。 And transmitting, to the source evolved base station, a handover request, where the handover request message carries the receiving state information of the user equipment.

15、根据权利要求 12至 14 中任一项所述的切换处理方法，其特征在于，所述接收状态信息包括： The handover processing method according to any one of claims 12 to 14, wherein the receiving status information comprises:

所述源中继节点最后发送的一个或多个新的数据包的序列号；或者，所述源中继节点最先未发送的一个或多个新的数据包的序列号。 a sequence number of one or more new data packets finally sent by the source relay node; or a sequence number of one or more new data packets that are not sent by the source relay node first.

16、根据权利要求 15所述的切换处理方法，其特征在于，所述根据所述丟包消息向所述源演进基站发送丟失的数据包包括： The handover processing method according to claim 15, wherein the transmitting the lost data packet to the source evolved base station according to the packet loss message comprises:

从所述丟包消息中获取丟失的数据包的序列号； Obtaining a sequence number of the lost data packet from the packet loss message;

根据所述丟失的数据包的序列号向所述源演进基站发送所述丟失的数据包。 Transmitting the lost data packet to the source evolved base station according to the sequence number of the lost data packet.

17、一种基站，其特征在于，包括： 17. A base station, comprising:

信息获取单元，用于从源中继节点获取所述用户设备的接收状态信息；丟失数据确定单元，用于根据所述信息获取单元获取的接收状态信息确定是否存在丟失的数据包； An information acquiring unit, configured to acquire, by the source relay node, the receiving state information of the user equipment; the data loss determining unit, configured to determine, according to the receiving state information acquired by the information acquiring unit, whether there is a lost data packet;

丟失数据获取单元，用于在所述丟失数据确定单元时，根据所述信息获取单元获取的接收状态信息从所述源中继节点获取所述丟失的数据包。 a lost data acquisition unit for using the lost data determination unit And acquiring the lost data packet from the source relay node according to the receiving state information acquired by the information acquiring unit.

18、根据权利要求 17所述的基站，其特征在于，所述切换确定单元包括：切换请求接收子单元，用于接收由所述源中继节点发送的切换请求；切换请求判断子单元，用于根据所述切换请求接收子单元接收的切换请求确定所述用户设备需要切换。 The base station according to claim 17, wherein the handover determining unit comprises: a handover request receiving subunit, configured to receive a handover request sent by the source relay node; and a handover request determination subunit, Determining that the user equipment needs to be handed over according to the handover request received by the handover request receiving subunit.

19、根据权利要求 17所述的基站，其特征在于，所述切换确定单元包括：测量报告接收子单元，用于接收由所述源中继节点发送的所述用户设备的测量报告； The base station according to claim 17, wherein the handover determining unit comprises: a measurement report receiving subunit, configured to receive a measurement report of the user equipment sent by the source relay node;

20、根据权利要求 17所述的基站，其特征在于，所述信息获取单元包括：状态报告接收子单元，用于接收由所述源中继节点发送的接收状态报告；状态信息获取子单元，用于从所述状态报告接收子单元接收的接收状态报告中获取所述用户设备的接收状态信息。 The base station according to claim 17, wherein the information acquiring unit comprises: a status report receiving subunit, configured to receive a receiving status report sent by the source relay node; and a status information acquiring subunit, And acquiring, by the status report received by the status report receiving subunit, the receiving status information of the user equipment.

21、根据权利要求 17所述的基站，其特征在于，所述丟失数据获取单元包括： The base station according to claim 17, wherein the lost data acquisition unit comprises:

丟失数据确定子单元，用于根据所述接收状态信息确定丟失的数据包；丟包消息发送子单元，用于向所述源中继节点发送丟包消息，所述丟包消息携带所述丟失数据确定子单元确定的丟失的数据包的序列号； a lost data determining subunit, configured to determine a lost data packet according to the received state information; a packet loss message sending subunit, configured to send a packet loss message to the source relay node, where the packet loss message carries the loss The data determines the sequence number of the lost data packet determined by the subunit;

22、根据权利要求 17所述的基站，其特征在于，还包括： The base station according to claim 17, further comprising:

多余数据确定单元，用于根据所述信息获取单元获取的接收状态信息确定是否存在多余的数据包； And a redundant data determining unit, configured to determine, according to the receiving status information acquired by the information acquiring unit, whether there is an excess data packet;

緩存清除单元，用于在所述多余数据确定单元确定存在多余的数据包时，根据所述信息获取单元获取的接收状态信息清除緩存中所述多余的数据包。a cache clearing unit, configured to: when the redundant data determining unit determines that there is a redundant data packet, And clearing the redundant data packet in the cache according to the receiving state information acquired by the information acquiring unit.

23、根据权利要求 17所述的基站，其特征在于，还包括： The base station according to claim 17, further comprising:

24、根据权利要求 23所述的基站，其特征在于，还包括： The base station according to claim 23, further comprising:

发送请求发送单元，用于通过移动性管理实体向服务网关发送双播 /多播请求，所述双播 /多播请求用于请求所述服务网关向目标演进基站和源演进基站双播 /多播发送数据包； a sending request sending unit, configured to send a bi-cast/multicast request to the serving gateway by using the mobility management entity, where the dual-homing/multicast request is used to request the serving gateway to multicast/multicast to the target evolved base station and the source evolved base station Broadcast data packet;

发送确认接收单元，用于接收由所述移动性管理实体转发的双播 /多播请求确认； a sending acknowledgement receiving unit, configured to receive a bi-cast/multicast request acknowledgement forwarded by the mobility management entity;

新数据接收单元，用于接收由所述服务网关双播 /多播发送的数据包；所述数据传输单元包括： a new data receiving unit, configured to receive a data packet that is dual-cast/multicast sent by the serving gateway; the data transmission unit includes:

25、一种中继节点，其特征在于，包括： 25. A relay node, comprising:

26、根据权利要求 25所述的中继节点，其特征在于，所述数据发送单元包括：序号获取子单元，用于从所述丟包消息接收单元接收的丟包消息中获取丟失的数据包的序列号； The relay node according to claim 25, wherein the data sending unit comprises: a sequence number obtaining subunit, configured to obtain a sequence number of the lost data packet from the packet loss message received by the packet loss message receiving unit;