WO2010037313A1

WO2010037313A1 - Inter network handoff method, system and access device thereof

Info

Publication number: WO2010037313A1
Application number: PCT/CN2009/073962
Authority: WO
Inventors: 钟鑫; 扈曙辉; 赵洁; 刘清顺
Original assignee: 华为技术有限公司
Priority date: 2008-09-26
Filing date: 2009-09-16
Publication date: 2010-04-08
Also published as: CN101686518A

Abstract

An inter network handoff method and system and access device are provided by the embodiments of the present invention. The inter network handoff method includes: obtaining target access network device information according to handoff information of a terminal received by a point access network device and forwarded by a source network side device; when the target access network device is different from the point access network device, sending the handoff information to the target access network device; forwarding radio resource information to the terminal via the source network side device, the radio resource information is assigned to the terminal by the target access network device according to the handoff information. The embodiments of the present invention solve inter network handoff problem that the terminal hands off from the source network to the target network when the point access network device receiving handoff information of the terminal forwarded by the source network side device is different form the target access network device located in the target sector that the terminal will handoff actually, so as to enhance ratio of success that the terminal inter network handoff.

Description

跨网切换方法和***及接入网设备本申请要求于 2008年 9月 26日提交中国专利局、申请号为 2008102230 69. 5、发明名称为 "跨网切换方法和***及接入网设备" 的中国专利申请的优先权，其全部内容通过引用结合在本申请中。技术领域 Inter-network handover method and system and access network equipment The application is submitted to the Chinese Patent Office on September 26, 2008, and the application number is 2008102230 69. 5. The invention name is "cross-network handover method and system and access network equipment". Priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

本发明实施例涉及无线通信技术，特别是涉及一种跨网切换方法和*** 及接入网设备。背景技术 The embodiments of the present invention relate to a wireless communication technology, and in particular, to an inter-network handover method and system, and an access network device. Background technique

不同标准化组织制定的网络之间的网络互通问题，例如： 3GPP标准化组织制定的网络与非 3GPP标准化组织制定的网络之间的网络互通问题，是当前标准化组织讨论的一个热点话题，其中备受关注的是 3GPP演进网络无线接入网长期演进 ( Long Term Evo lut ion, 以下简称 LTE ) 项目与 3GPP2中演进的高速率分组数据（Evo lved H i gh Ra te Packet Da ta , 以下简称 eHRPD )之间的网络互通。 Network interworking between networks developed by different standardization organizations, for example: Network interworking between networks developed by 3GPP standardization organizations and networks established by non-3GPP standardization organizations is a hot topic in current standards organization discussions, which has received much attention. The 3GPP evolved network radio access network Long Term Evolution (LTE) project and the evolved high rate packet data (Evo lved H i gh Ra te Packet Da ta, hereinafter referred to as eHRPD) Network interoperability.

多模终端功能上支持在多个网络间进行跨网切换。假设支持 LTE/eHRPD 网络的双模终端是单发双收的双模终端。当单发双收的双模终端在一个网络上收发数据时，它不可能同时在另一个网络上执行注册、鉴权或者会话协商的工作，使得终端进行跨网切换时，须先进行终端注册、鉴权或者会话协商等工作。这些过程通常需要几秒，造成数据传输中断，极大地影响了实时业务（如： Vo IP语音业务等）在跨网切换过程中的业务质量。为了降低实时业务在跨网切换过程中的延时，可在终端仍然还位于源网络侧时，通过源网络资源以及源网络与目标网络的接口，进行终端在目标网络的 "预注册" ；即当终端仍位于源网络侧时 , 一边收发数据 , 一边通过源网络和目标网络之间的接口执行在目标网络的注册、鉴权或者会话协商等工作。这样在终端真正进行跨网切换的时候，终端可以立即开始在目标网络收发数据，因此缩短了由于跨网切换而导致业务中断的时间。 Multimode terminals support cross-network switching between multiple networks. Assume that the dual-mode terminal supporting the LTE/eHRPD network is a dual-mode terminal with single-shot and dual-receiver. When a single-mode dual-received dual-mode terminal transmits and receives data on one network, it is impossible to perform registration, authentication, or session negotiation on another network at the same time, so that when the terminal performs cross-network handover, terminal registration must be performed first. , authentication or conversational negotiation. These processes usually take a few seconds, causing data transmission interruption, which greatly affects the quality of service of real-time services (such as Vo IP voice services) during inter-network handover. In order to reduce the delay of the real-time service in the inter-network handover process, the terminal may be pre-registered in the target network through the source network resource and the interface between the source network and the target network when the terminal is still located at the source network side; When the terminal is still located on the source network side, while transmitting and receiving data, the registration, authentication, or session negotiation of the target network is performed through the interface between the source network and the target network. In this way, when the terminal actually performs the cross-network handover, the terminal can immediately start to send and receive data on the target network, thereby shortening the time for the service interruption due to the cross-network handover.

终端从 LTE网络切换到 eHRPD网络的切换过程包括 "预注册" 过程和切换执行过程。终端在 LTE网络首先进行 eHRPD网络的 "预注册" 。在预注册区域的每个 LTE 网络基站（Evo lved Node B, 以下简称 eNB )上都配有一个 eHRPD网络的扇区标识信息（ Sec tor lD )；该扇区标识信息是静态配置在 eNB 上的。当终端进行切换执行流程时，即当终端真正发起从 LTE 网络到 eHRPD 网络的切换操作时，位于 LTE网络侧的终端将切换信息发送给与静态配置在 eNB 的扇区标识信息相应的目标网络侧基站（以下称为端点接入网设备），由端点接入网设备为终端分配 eHRPD无线资源信息。 The handover process of the terminal from the LTE network to the eHRPD network includes a "pre-registration" process and a handover execution process. The terminal first performs "pre-registration" of the eHRPD network on the LTE network. Each LTE network base station (Evo lved Node B, hereinafter referred to as eNB) in the pre-registration area is provided with sector identification information (Sec tor lD) of the eHRPD network; the sector identification information is statically configured on the eNB. . When the terminal performs the handover execution process, that is, when the terminal actually initiates the handover operation from the LTE network to the eHRPD network, the terminal located on the LTE network side sends the handover information to the target network side corresponding to the sector identification information statically configured in the eNB. The base station (hereinafter referred to as an endpoint access network device) allocates eHRPD radio resource information to the terminal by the endpoint access network device.

发明人在实现本发明实施例过程中发现，如果 eHRPD端点接入网设备不是目标接入网设备，终端从源网络（ LTE )到目标网络（ eHRPD )的切换失败，因此，现有技术终端跨网切换成功率较低。发明内容 During the implementation of the embodiment of the present invention, the inventor finds that if the eHRPD endpoint access network device is not the target access network device, the handover of the terminal from the source network (LTE) to the target network (eHRPD) fails, and therefore, the prior art terminal crosses. The network switching success rate is low. Summary of the invention

本发明实施例提供了一种跨网切换方法和***及接入网设备，用于提高终端跨网切换的成功率。 The embodiments of the present invention provide an inter-network handover method and system, and an access network device, which are used to improve the success rate of terminal cross-network handover.

本发明实施例提供了一种跨网切换方法，包括： An embodiment of the present invention provides an inter-network handover method, including:

根据端点接入网设备接收的源网络侧设备转发的终端的切换信息，获取目标接入网设备信息； Acquiring the target access network device information according to the handover information of the terminal forwarded by the source network device received by the endpoint access network device;

当所述目标接入网设备与端点接入网设备不同时，向所述目标接入网设备发送所述切换信息； Transmitting the handover information to the target access network device when the target access network device is different from the endpoint access network device;

将所述目标接入网设备根据所述切换信息为所述终端分配的无线资源信息，通过所述源网络侧设备转发给所述终端。本发明实施例提供的跨网切换方法中，当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到目标扇区所属的目标接入网设备不同时，将端点接入网设备接收的切换信息发送给目标接入网设备，由目标接入网设备为终端分配目标网络的无线资源 , 并通过源网络侧设备转发给终端，从而解决了当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到的目标扇区所属的目标接入网设备不同时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 And transmitting the radio resource information allocated by the target access network device to the terminal according to the handover information, and forwarding the information to the terminal by using the source network side device. In the cross-network handover method provided by the embodiment of the present invention, when the endpoint access network device that receives the terminal handover information forwarded by the source network side device is different from the target access network device to which the target sector is to be switched, The switching information received by the endpoint access network device is sent to the target access network device, and the target access network device allocates the radio resource of the target network to the terminal, and forwards the radio resource to the terminal through the source network side device, thereby solving the receiving source network side. When the endpoint access network device of the terminal switching information forwarded by the device is different from the target access network device to which the target sector to which the terminal actually switches, the cross-network handover problem of the terminal from the source network to the target network improves the terminal cross The success rate of network switching.

本发明实施例还提供了一种接入网设备，包括： An embodiment of the present invention further provides an access network device, including:

解析模块，用于根据接收的源网络侧设备转发的终端的切换信息，获取目标接入网设备信息； a parsing module, configured to obtain, according to the received handover information of the terminal that is forwarded by the source network device, the target access network device information;

判断模块，用于根据所述目标接入网设备信息，判断所述目标接入网设备是否为本接入网设备； a determining module, configured to determine, according to the target access network device information, whether the target access network device is an access network device;

通信模块，用于当所述目标接入网设备与本接入网设备不同时，向所述目标接入网设备发送所述切换信息；以及接收所述目标接入网设备根据所述切换信息为所述终端分配的无线资源信息，并通过源网络侧设备向所述终端转发所述无线资源信息。 a communication module, configured to: when the target access network device is different from the local access network device, send the handover information to the target access network device; and receive the target access network device according to the handover information The radio resource information allocated to the terminal, and the radio resource information is forwarded to the terminal by the source network side device.

本发明实施例提供的一种接入网设备中，当判断模块判断出接入网设备自身不是终端要切换到的目标扇区所属的目标接入网设备时，由通信模块将源网络侧设备转发的终端切换信息发送给目标接入网设备，并将目标接入网设备为终端分配无线资源信息通过源网络侧设备发送给终端，从而解决了当接收源网络侧设备转发的终端切换信息的接入网设备、与终端实际要切换到的目标扇区所属的目标接入网设备不同（即本接入网设备与目标接入网设备不同）时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In the access network device provided by the embodiment of the present invention, when the determining module determines that the access network device itself is not the target access network device to which the target sector to which the terminal is to be switched, the source network side device is used by the communication module. The forwarded terminal switching information is sent to the target access network device, and the target access network device allocates the wireless resource information to the terminal through the source network side device, thereby solving the terminal switching information forwarded by the receiving source network side device. When the access network device is different from the target access network device to which the target sector to which the terminal is actually switched (that is, the access network device is different from the target access network device), the terminal crosses the network from the source network to the target network. Switching problems improve the success rate of terminal cross-network switching.

本发明实施例还提供了另一种接入网设备，包括： An embodiment of the present invention further provides another access network device, including:

接收模块，用于接收端点接入网设备发送的源网络侧设备转发的终端切换信息； a receiving module, configured to receive a terminal cut by the source network side device sent by the endpoint access network device Change information;

无线资源分配模块，用于根据所述切换信息为所述终端分配无线资源；发送模块，用于将所述无线资源信息发送给所述源网络侧设备，触发所述源网络侧设备转发所述无线资源信息给所述终端；或者，将所述无线资源信息发送给所述端点接入网设备，触发所述端点接入网设备通过所述源接入网将所述无线资源信息转发给所述终端。 a radio resource allocation module, configured to allocate a radio resource to the terminal according to the handover information, and a sending module, configured to send the radio resource information to the source network side device, and trigger the source network side device to forward the Transmitting the radio resource information to the terminal; or transmitting the radio resource information to the endpoint access network device, triggering the endpoint access network device to forward the radio resource information to the Said terminal.

本发明实施例提供的另一种接入网设备中，当接收模块接收到端点接入网设备转发的源网络侧终端的切换信息时，触发无线资源分配模块为终端分配无线资源，并将无线资源信息直接通过源网络侧设备转发给终端或经端点接入网设备通过源网络侧设备转发给终端，从而解决了当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到的目标扇区所属的目标接入网设备不同（即端点接入网设备与本接入网设备不同）时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In another access network device provided by the embodiment of the present invention, when the receiving module receives the switching information of the source network side terminal forwarded by the endpoint access network device, the triggering the wireless resource allocation module allocates the wireless resource to the terminal, and the wireless device The resource information is directly forwarded to the terminal through the source network side device or forwarded to the terminal through the source network side device, thereby solving the endpoint access network device and the terminal when receiving the terminal handover information forwarded by the source network side device. When the target access network device to which the target sector to be actually switched belongs is different (that is, the endpoint access network device is different from the access network device), the terminal crosses the network from the source network to the target network, and the terminal crosses. The success rate of network switching.

本发明实施例还提供了一种跨网切换***，包括终端和源网络侧设备，以及端点接入网设备和目标接入网设备，所述端点接入网设备和目标接入网设备均位于目标网络侧； The embodiment of the present invention further provides an inter-network handover system, including a terminal and a source network side device, and an endpoint access network device and a target access network device, where the endpoint access network device and the target access network device are located. Target network side;

所述终端用于通过所述源网络侧设备向所述端点接入网设备发送切换信息； The terminal is configured to send, by using the source network side device, handover information to the endpoint access network device;

所述端点接入网设备用于根据所述切换信息，获取目标接入网设备的信息；若所述目标接入网设备与端点接入网设备不同，向所述目标接入网设备发送所述切换信息； The endpoint access network device is configured to acquire information about a target access network device according to the handover information; and if the target access network device is different from the endpoint access network device, send the location to the target access network device. Switching information;

所述目标接入网设备用于将所述无线资源信息发送给所述源网络侧设备，触发所述源网络侧设备转发所述无线资源信息给所述终端；或者，将所述无线资源信息发送给所述端点接入网设备，触发所述端点接入网设备通过所述源接入网将所述无线资源信息转发给所述终端。 The target access network device is configured to send the radio resource information to the source network side device, and trigger the source network side device to forward the radio resource information to the terminal; or Sending to the endpoint access network device, triggering the endpoint access network device to forward the radio resource information to the terminal by using the source access network.

本发明实施例提供的跨网切换***中，当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到目标扇区所属的目标接入网设备不同时，端点接入网设备将源网络侧设备转发的终端切换信息发送给目标接入网设备，由目标接入网设备为终端分配目标网络的无线资源并发送给终端，从而解决了当端点接入网设备与目标接入网设备不同时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。附图说明 In the inter-network switching system provided by the embodiment of the present invention, when receiving the terminal forwarded by the source network side device When the endpoint access network device of the handover information is different from the target access network device to which the target sector is to be switched, the endpoint access network device sends the terminal handover information forwarded by the source network side device to the target access network device. The target access network device allocates the radio resource of the target network to the terminal and sends the radio resource to the terminal, thereby solving the problem of the inter-network handover of the terminal from the source network to the target network when the endpoint access network device is different from the target access network device. , improve the success rate of terminal cross-network switching. DRAWINGS

图 1为本发明跨网切换方法第一实施例流程图； 1 is a flowchart of a first embodiment of an inter-network handover method according to the present invention;

图 2a是本发明跨网切换方法应用场景 3GPP演进网络架构图；图 2b是本发明跨网切换方法应用场景 eHRPD网络 A. S 0008架构图；图 2c是本发明跨接入技术切换方法应用场景 eHRPD网络 A. S 0009架构图； 2a is a 3GPP evolution network architecture diagram of the cross-network handover method application scenario of the present invention; FIG. 2b is a cross-network handover method application scenario eHRPD network A. S 0008 architecture diagram of the present invention; FIG. 2c is a cross-access technology handover method application scenario of the present invention; eHRPD network A. S 0009 architecture diagram;

图 2d为本发明实施例应用场景 3GPP网络与 eHRPD网络互通的架构图；图 3为本发明跨网切换方法第二实施例流程图； FIG. 2 is a schematic diagram of an interworking between a 3GPP network and an eHRPD network according to an embodiment of the present invention; FIG. 3 is a flowchart of a second embodiment of an inter-network handover method according to the present invention;

图 4a为现有技术终端从 E-UTRAN向 eHRPD网络切换方法流程图；图 4b为现有技术 eNB存在二个相邻 eHRPD扇区情形的网络架构图；图 5为本发明跨网切换方法第三实施例流程图； 4a is a flow chart of a method for switching a terminal from an E-UTRAN to an eHRPD network in the prior art; FIG. 4b is a network architecture diagram of a situation in which two adjacent eHRPD sectors exist in the prior art eNB; FIG. Three embodiment flow chart;

图 6为本发明跨网切换方法第四实施例流程图； 6 is a flowchart of a fourth embodiment of an inter-network handover method according to the present invention;

图 7为本发明跨网切换方法第五实施例流程图； 7 is a flowchart of a fifth embodiment of an inter-network handover method according to the present invention;

图 8为本发明接入网设备实施例结构图； 8 is a structural diagram of an embodiment of an access network device according to the present invention;

图 9a为本发明另一接入网设备第一实施例结构图； 9a is a structural diagram of a first embodiment of another access network device according to the present invention;

图 9b为本发明另一接入网设备第二实施例结构图； 9b is a structural diagram of a second embodiment of another access network device according to the present invention;

图 9c为本发明另一接入网设备第三实施例结构图； 9c is a structural diagram of a third embodiment of another access network device according to the present invention;

图 1 0为本发明跨网切换***第一实施例结构图； 10 is a structural diagram of a first embodiment of an inter-network switching system according to the present invention;

图 1 1为本发明跨网切换***第二实施例结构图； 1 is a structural diagram of a second embodiment of an inter-network switching system according to the present invention;

图 12为本发明跨网切换***第三实施例结构图。具体实施方式 FIG. 12 is a structural diagram of a third embodiment of an inter-network switching system according to the present invention. detailed description

下面通过附图和实施例，对本发明的技术方案做进一步的详细描述。为便于描述本发明实施例的技术方案，首先对本发明下列各详述实施例中出现的术语进行说明。本发明下列各详述实施例中，源网络即为终端当前所在的网络；目标网络即为终端需要切换到的网络。端点接入网设备、目标接入网设备和源接入网设备都位于目标网络侧。其中端点接入网设备即为位于目标网络侧、且接收源网络侧设备转发的终端切换信息的接入网设备；目标接入网设备即为终端需要切换到的目标扇区所属的接入网设备；源接入网设备即为存储有终端会话信息的接入网设备。此外，目标分组控制功能设备即为位于目标网络侧、且与目标接入网设备关联的分组控制功能设备。源分组控制功能设备即为位于目标网络侧、且与源接入网设备关联的分组控制功能设备。根据实际涉及的***架构不同，如对于 eHRPD网络 A. S 0008架构，终端的会话信息存储在接入网设备上；而对于 eHRPD网络 A. S 0009架构，终端的会话信息存储在分组控制功能设备上；源分组控制功能设备即为存储有终端会话信息的分组控制功能设备。 The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. In order to facilitate the description of the technical solutions of the embodiments of the present invention, the terms appearing in the following detailed embodiments of the present invention are first described. In the following detailed embodiments of the present invention, the source network is the network where the terminal is currently located; the target network is the network that the terminal needs to switch to. The endpoint access network device, the target access network device, and the source access network device are all located on the target network side. The endpoint access network device is an access network device that is located at the target network side and receives the terminal handover information forwarded by the source network side device; the target access network device is the access network to which the target sector to which the terminal needs to be handed over belongs. The source access network device is an access network device that stores terminal session information. In addition, the target packet control function device is a packet control function device located on the target network side and associated with the target access network device. The source group control function device is a group control function device located on the target network side and associated with the source access network device. According to the actual system architecture involved, for example, for the eHRPD network A. S 0008 architecture, the session information of the terminal is stored on the access network device; and for the eHRPD network A. S 0009 architecture, the session information of the terminal is stored in the packet control function device. The source packet control function device is a packet control function device that stores terminal session information.

图 1为本发明跨网切换方法第一实施例流程图。如图 1所示，本实施例包括： FIG. 1 is a flowchart of a first embodiment of an inter-network handover method according to the present invention. As shown in FIG. 1, this embodiment includes:

步骤 1 1、根据端点接入网设备接收的源网络侧设备转发的终端的切换信息，获取目标接入网设备信息。端点接入网设备和目标接入网设备可以位于目标网络侧。 Step 1 1. Acquire the target access network device information according to the handover information of the terminal forwarded by the source network side device received by the endpoint access network device. The endpoint access network device and the target access network device may be located on the target network side.

步骤 1 2、若目标接入网设备与端点接入网设备不同，向目标接入网设备发送该切换信息。 Step 1 2. If the target access network device is different from the endpoint access network device, send the handover information to the target access network device.

步骤 1 3、将目标接入网设备根据切换信息为终端分配的无线资源信息，通过源网络侧设备转发给终端。 Step 1 3: The radio resource information allocated by the target access network device to the terminal according to the handover information is forwarded to the terminal by the source network side device.

本实施例当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到目标扇区所属的目标接入网设备不同时，端点接入网设备将接收的切换信息发送给目标接入网设备，由目标接入网设备为终端分配目标网络的无线资源，并通过源网络侧设备转发给终端，从而解决了当端点接入网设备与目标接入网设备不同时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In this embodiment, when the endpoint access network device that receives the terminal handover information forwarded by the source network side device is different from the target access network device to which the target actually belongs to the target sector, the endpoint access network device The receiving switch information is sent to the target access network device, and the target access network device allocates the radio resource of the target network to the terminal, and forwards the radio resource to the terminal through the source network side device, thereby solving the problem that when the endpoint accesses the network device and the target When the access network devices are different, the inter-network handover problem of the terminal from the source network to the target network improves the success rate of the terminal cross-network handover.

在本实施例技术方案的基石出上，当目标接入网设备接收到端点接入网设备转发的切换信息时，可根据切换信息为终端分配无线资源。在目标接入网设备完成终端无线资源的分配时，目标接入网设备可将无线资源信息发送给端点接入网设备，由端点接入网设备发送给源网络侧设备，再通过源网络侧设备转发给终端；或者，在端点接入网设备向目标接入网设备发送切换信息时，端点接入网设备还将源网络侧设备的地址信息发送给目标接入网设备，这样，当目标接入网设备完成终端无线资源的分配后，可由目标接入网设备将无线资源信息经源网络侧设备转发给终端，从而简化无线资源信息的传输流程。 On the basis of the technical solution of the embodiment, when the target access network device receives the handover information forwarded by the endpoint access network device, the terminal may allocate the radio resource to the terminal according to the handover information. When the target access network device completes the allocation of the terminal radio resources, the target access network device may send the radio resource information to the endpoint access network device, and the endpoint access network device sends the information to the source network side device, and then passes through the source network side. The device forwards the information to the terminal; or, when the endpoint access network device sends the handover information to the target access network device, the endpoint access network device sends the address information of the source network side device to the target access network device, so that the target After the access network device completes the allocation of the terminal radio resources, the target access network device may forward the radio resource information to the terminal through the source network side device, thereby simplifying the transmission process of the radio resource information.

以下举例说明本发明跨网切换方法实施例的应用场景可涉及的网络架构。 The following is an example of a network architecture that may be involved in the application scenario of the embodiment of the cross-network handover method of the present invention.

图 2a是本发明跨网切换方法应用场景 3GPP演进网络架构图。如图 2a 所示， 3GPP的 LTE项目中，演进的通用移动通信***地面无线接入网（ Evolved UMTS Terres t r ia l Radio Acces s Network , 以下简称 E-UTRAN ) 由演进后的基站（Evolved Node B, 简称 eNB )组成，负责数据的调制解调；服务网关 ( Serving Ga teway, 以下简称 S-GW )和分组数据网网关（ PDN Ga teway, 以下简称 PDN-GW )是演进后的网关，负责转发数据包；移动性管理网元（ Mob i 1 i ty Management Ent i ty, 以下简称丽 E )是演进***的信令控制实体设备，负责鉴权、移动性管理等功能。演进后的网络不提供传统电路交换的语音功能，可提供高速率数据承载业务。 2a is a schematic diagram of a 3GPP evolution network architecture of an application scenario of the cross-network handover method of the present invention. As shown in FIG. 2a, in the 3GPP LTE project, the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) is evolved by the evolved base station (Evolved Node B). , referred to as eNB ), is responsible for data modulation and demodulation; Serving Gateway (hereinafter referred to as S-GW) and Packet Data Network Gateway (PDN Ga teway, hereinafter referred to as PDN-GW) are evolved gateways, responsible for forwarding The data packet; the mobility management network element (hereinafter referred to as MN) is a signaling control entity device of the evolved system, and is responsible for functions such as authentication and mobility management. The evolved network does not provide traditional circuit-switched voice functions and provides high-rate data bearer services.

高速率分组数据（H igh Ra te Packet Da ta , 以下简称 HRPD ) 网络是一种第三代数据无线通信***，不提供传统电路交换的语音功能，可提供高速率数据承载业务；亦称为 CDMA2000 lx EVDO; eHRPD网络是基于 HRPD的演进的高速率分组数据***。 eHRPD 网络中接入网 ( Radio Access Network, 简称 RAN)设备包括演进接入网节点（Evolved Access Node, 以下简称 eAN) 和分组控制功能设备 (Packet Control Function, 以下简称 PCF) , 其中 eAN 相当于基站和基站控制器，负责数据的调制解调以及切换等； PCF 负责分组控制； HRPD服务网关（HRPD Serving Gateway, 以下简称 HSGW) 由 HRPD网络的分组数据服务节点（Packet Data Serving Node, 简称 PDSN)升级而成，负责数据转发、鉴权和计费等。在 eHRPD网络中，终端（AT)通过空中 AL接口与 eAN通信连接， eAN与 PCF之间通过 A8和 A9接口通信， A8是用户面接口， A9是信令面接口； PCF与 HSGW通过 A10和 All接口通信。 High-rate packet data (HPD) is a third-generation data wireless communication system that does not provide traditional circuit-switched voice functions and provides high-speed Rate data bearer service; also known as CDMA2000 lx EVDO; eHRPD network is an evolved high rate packet data system based on HRPD. The Radio Access Network (RAN) device in the eHRPD network includes an Evolved Access Node (eAN) and a Packet Control Function (PCF), where eAN is equivalent to a base station. And the base station controller, responsible for data modulation and demodulation and handover; PCF is responsible for packet control; HRPD Serving Gateway (hereinafter referred to as HSGW) is upgraded by Packet Data Serving Node (PDSN) of HRPD network It is responsible for data forwarding, authentication and billing. In the eHRPD network, the terminal (AT) communicates with the eAN through the air AL interface, the eAN and the PCF communicate through the A8 and A9 interfaces, A8 is the user plane interface, A9 is the signaling plane interface; PCF and HSGW pass the A10 and All Interface communication.

eHRPD网络存在两种架构，一种称为 A. S0008架构，另外一种称为 A. S0009 架构。图 2b是本发明跨网切换方法应用场景 eHRPD网络 A. S0008架构图。图 2c是本发明跨接入技术切换方法应用场景 eHRPD网络 A. S0009架构图。两种架构的最大区别是会话协商和移动性管理的功能的位置不同。 A. S0008 架构的会话协商和移动性管理功能在 eAN上，而 A. S0009架构的会话协商和位置管理的功能在 PCF上；该架构区别在会话转移处理上表现为：如图 2b所示，对于 A. S0008架构，会话保存在 eAN上，因此会话的转移是在 eAN之间进行； eAN之间通过 A13接口进行通信。如图 2c所示，对于 A. S0009架构，会话保存在 PCF上，因此会话的转移是在 PCF之间进行； eAN之间通过 A15接口进行通信， PCF之间通过 A13接口通信。 There are two architectures for the eHRPD network, one called A. S0008 architecture and the other called A. S0009 architecture. 2b is a schematic diagram of an application scenario of the cross-network handover method of the present invention eHRPD network A. S0008. 2c is a structural diagram of an application cross-access technology handover method eHRPD network A. S0009. The biggest difference between the two architectures is the location of the functions of session negotiation and mobility management. A. The session negotiation and mobility management functions of the S0008 architecture are on the eAN, and the session negotiation and location management functions of the A. S0009 architecture are on the PCF; the architecture difference is represented in the session transfer processing as follows: For the A. S0008 architecture, the session is saved on the eAN, so the transfer of the session is between the eANs; the eANs communicate through the A13 interface. As shown in Figure 2c, for the A. S0009 architecture, the session is stored on the PCF, so the transfer of the session is between the PCFs; the eANs communicate via the A15 interface, and the PCFs communicate via the A13 interface.

图 2d为本发明实施例应用场景 3GPP网络与 eHRPD网络互通的架构图。如图 2d所示，在 LTE网络与 eHRPD网络之间互通的网络架构中，增加了两个接口：第一个接口是 S101接口；第二个接口是 S103接口。 S101接口是丽 E 与 eAN之间的接口，其本质是一个隧道，转发终端和目标网络之间的信令或信令及数据，辅助终端在目标网络进行预注册或者从源网络切换到目标网络。 S103接口是 S-GW和 HSGW之间的接口，用于转发 3GPP演进网络滞留的数据到 eHRPD网络，然后通过 eHRPD网络发送给终端。 FIG. 2 is a structural diagram of interworking between an application scenario 3GPP network and an eHRPD network according to an embodiment of the present invention. As shown in Figure 2d, two interfaces are added to the network architecture between the LTE network and the eHRPD network: the first interface is the S101 interface; the second interface is the S103 interface. The S101 interface is an interface between the MN and the eAN. It is essentially a tunnel, which forwards signaling or signaling and data between the terminal and the target network. The auxiliary terminal performs pre-registration on the target network or switches from the source network to the target network. . The S103 interface is an interface between the S-GW and the HSGW, and is used to forward data retained by the 3GPP evolved network. Go to the eHRPD network and send it to the terminal through the eHRPD network.

以下均以 LTE项目中 E-UTRAN切换到 eHRPD网络的应用场景为例，进一步说明本发明跨网切换方法实施例的技术方案；其中，丽 E 即为本发明跨网切换方法实施例的源网络侧设备。 The following is an example of an application scenario in which the E-UTRAN is switched to the eHRPD network in the LTE project, and the technical solution of the embodiment of the cross-network handover method of the present invention is further described. Side equipment.

图 3为本发明跨网切换方法第二实施例流程图。本实施例是以 eHRPD中 FIG. 3 is a flowchart of a second embodiment of an inter-network handover method according to the present invention. This embodiment is in eHRPD

A. S 0008架构为例（参图 2b所示），说明当 S1 01端点 eAN与目标 eAN不同时，完成从 E-UTRAN到 eHRPD的跨网切换的技术方案。本实施例中， S101 端点 eAN即为本发明端点接入网设备，目标 eAN ( Target eAN ) 即为本发明目标接入网设备，源 eAN ( Source eAN ) 即为本发明源接入网设备。 A. S0008 架构的会话协商和移动性管理功能在 eAN上，会话保存在 eAN上，因此会话的转移是在 eAN之间通过 A1 3接口进行； eAN与 PCF之间通过 A8和 A9 接口通信， A8是用户面接口， A9是信令面接口。如图 3所示的流程图假设终端通过预注册过程与 eAN协商会话。当跨网切换发生时， eAN与 PCF之间遵循 A8 接口协议的用户面连接 (以下称为 A8连接 ) 已经断开。假设在 E-UTRAN上存在一个激活的业务，预注册已经完成， E-UTRAN 上静态配置扇区标识信息 ( Sec tor ID ) , 且 LTE与 eHRPD网络间的 S101隧道已经被建立。 The A. S 0008 architecture is taken as an example (refer to FIG. 2b), and the technical solution for completing the cross-network handover from E-UTRAN to eHRPD is completed when the S1 01 endpoint eAN is different from the target eAN. In this embodiment, the S101 endpoint eAN is the endpoint access network device of the present invention, and the target eAN (Target eAN) is the target access network device of the present invention, and the source eAN (Source eAN) is the source access network device of the present invention. A. S0008 architecture session negotiation and mobility management function On the eAN, the session is saved on the eAN, so the session transfer is performed between the eANs through the A1 3 interface; the eAN and the PCF communicate through the A8 and A9 interfaces, A8 It is a user plane interface, and A9 is a signaling plane interface. The flow chart shown in Figure 3 assumes that the terminal negotiates a session with the eAN through a pre-registration process. When an inter-network handover occurs, the user plane connection (hereinafter referred to as A8 connection) following the A8 interface protocol between the eAN and the PCF has been disconnected. Assuming that there is an active service on the E-UTRAN, the pre-registration has been completed, the sector identification information (Sec tor ID) is statically configured on the E-UTRAN, and the S101 tunnel between the LTE and the eHRPD network has been established.

如图 3所示，本实施例包括： As shown in FIG. 3, this embodiment includes:

步骤 31、 E-UTRAN根据网络实际情况判断终端应该切换到 eHRPD; 例如：当 E-UTRAN发现当前所在 LTE网络的信号艮弱时， E-UTRAN认为该终端应该切换到 eHRPD网络中。 Step 31: The E-UTRAN judges that the terminal should switch to the eHRPD according to the actual situation of the network; for example: When the E-UTRAN finds that the signal of the current LTE network is weak, the E-UTRAN considers that the terminal should switch to the eHRPD network.

步骤 32a、终端经 E-UTRAN向 MME发送 eHRPD网络的切换信息，该切换信息包括连接请求 ( Connec t ionReques t ) 消息和路径更新 ( RouteUpda te ) 消息，用以请求在 eHRPD网络无线资源和分配业务信道；其中，该连接请求中携带预注册过程中分配的终端标识（UATI )；路径更新 ( RouteUpda te )消息包括终端测量的导频信息，该导频信息包括每个导频的导频偏移参数 ( P i lotPN )和导频强度。该切换请求中还可包含 eNB静态配置的扇区标识信息（Sector ID) 。 Step 32: The terminal sends the handover information of the eHRPD network to the MME via the E-UTRAN, where the handover information includes a connection request and a route update message, and is used to request the radio resource and the service in the eHRPD network. a channel identifier, where the connection request carries a terminal identifier (UATI) allocated in the pre-registration process; the route update (RouteUpda te) message includes pilot information measured by the terminal, and the pilot information includes a pilot offset of each pilot. Parameters (P i lotPN ) and pilot strength. The handover request may further include a sector identification letter statically configured by the eNB. (Sector ID).

步骤 32b、 MME通过 SI 01隧道向与该扇区标识信息（ Sector ID )相应的 eAN ( 即 S101 端点 eAN ( S101 endpoint eAN ) ) 转发切换信息 ( Connect ionRequest+RouteUpdate )，同时 MME将 P-GW地址信息和 P-GW上行通用路由打包协议键值 ( GRE key )信息携带在 S101直接传输消息（ Direct Transfer )消息中发送给 SI 01端点 eAN。 MME还会通过 SI 01直接传输（S101 Direct Transfer ) 消息将扇区标识信息 ( Sector ID) 带给 S101端点 eAN。 Step 32b: The MME forwards the handover information (ConnectionRequest+RouteUpdate) to the eAN corresponding to the sector identifier information (S101 endpoint eAN) through the SI 01 tunnel, and the MME sets the P-GW address. The information and the P-GW uplink general routing packet protocol key value (GRE key) information are carried in the S101 Direct Transfer message (Direct Transfer) message and sent to the SI 01 endpoint eAN. The MME also brings the sector identification information (Sector ID) to the S101 endpoint eAN through the SI 01 Direct Transfer (S101 Direct Transfer) message.

SectorlD是一个 128比特（bit)的标识号。每个 HRPD扇区的扇区标识信息 ( SectorlD )都是唯一的。 S101端点 eAN获取目标 eAN信息实现方法可包括：在切换发生时， S101端点 eAN根据扇区标识信息（ Sec tor ID) , 查询预先存储的扇区标识信息与导频偏移参数（Pi lotPN)对应关系表，可获知该扇区标识信息（ Sector ID )对应的扇区以及该扇区相邻的扇区的导频偏移参数 (PilotPN)信息。 S101端点 eAN通过比较位置更新请求（ RouteUpdate ) 消息中终端所测得的各导频的导频偏移参数（PilotPN)信息和导频强度，可准确判断终端所接收的导频信号最强的是哪个扇区；进而查询预先存储的扇区标识信息与 eAN对应关系表，获取导频信号最强的扇区所属的 eAN, 该 eAN 即为终端要切换到的目标 eAN。 SectorlD is a 128-bit identification number. The sector identification information ( SectorlD ) of each HRPD sector is unique. The S101 endpoint eAN obtaining target eAN information implementation method may include: when the handover occurs, the S101 endpoint eAN queries the pre-stored sector identification information and the pilot offset parameter (Pi lotPN) according to the sector identification information (Sec tor ID) The relationship table can learn the sector corresponding to the sector identification information (Sector ID) and the pilot offset parameter (PilotPN) information of the sector adjacent to the sector. The S101 endpoint eAN can accurately determine the pilot signal received by the terminal by comparing the pilot offset parameter (PilotPN) information and the pilot strength of each pilot measured in the Location Update request (routeUpdate) message. Which sector; further queries the pre-stored sector identification information and the eAN correspondence table to obtain the eAN to which the sector with the strongest pilot signal belongs, and the eAN is the target eAN to which the terminal is to be handed over.

步骤 33、 S101 端点 eAN 收到 MME 通过 S101 隧道发送的切换信息 ( Connect ionRequest + RouteUpdate )后，根据切换信息判断目标 eAN信息，如果目标 eAN非本 eAN, 即目标则 eAN与 S101端点 eAN不是同一个 eAN时， S101端点 eAN向目标 eAN发送终端的切换信息。这里可定义一个新的消息，即 A13-透明传输消息（A13-Message Transfer ) , 该消息便于利用 A13接口转发终端切换信息等。 A13-透明传输消息包括步骤 32b 中的切换信息 ( Connect ionRequest + RouteUpdate ) 、 E-UTRUN静态酉己置的扇区标 i只信息- ( SectorlD) , P-GW地址和 P-GW的上行 GRE键值信息。 Step 33: After receiving the handover information (ConnectionRequest+Route Update) sent by the MME through the S101 tunnel, the endpoint eAN determines the target eAN information according to the handover information. If the target eAN is not the eAN, that is, the target eAN is not the same as the S101 endpoint eAN. In the eAN, the S101 endpoint eAN sends the handover information of the terminal to the target eAN. Here, a new message can be defined, that is, A13-Message Transfer (A13-Message Transfer), which facilitates the use of the A13 interface to forward terminal switching information and the like. The A13-transparent transmission message includes the handover information (ConnectionRequest + RouteUpdate) in step 32b, the sector identifier i information only in the E-UTRUN static state - (SectorlD), the P-GW address, and the uplink GRE button of the P-GW. Value information.

目标 eAN收到 A13-透明传输 ( A13-Message Transfer ) 消息后，判断自身是否存储有终端的会话信息。具体的，目标 eAN根据切换信息中包括的终端标识（UATI )信息，可获知存储有终端会话信息的 eAN信息。如果目标 eAN 获知自身存储有终端会话信息，执行步骤 35; 否则，向存储有终端会话信息的其它 eAN (以下称为源 eAN (Source eAN) )获取终端的会话信息，执行步骤 34a。 After the target eAN receives the A13-Transport (A13-Message Transfer) message, it judges Whether the session information of the terminal is stored. Specifically, the target eAN can learn the eAN information storing the terminal session information according to the terminal identifier (UATI) information included in the handover information. If the target eAN is aware that the terminal session information is stored by itself, step 35 is performed; otherwise, the session information of the terminal is acquired from other eANs (hereinafter referred to as source eANs) storing the terminal session information, and step 34a is performed.

步骤 34a、目标 eAN向源 eAN发送 A13-会话信息请求消息 ( A13-Session Information Request ) , 用于请求获取终端的会话信息。 Step 34: The target eAN sends an A13-Session Information Request message (A13-Session Information Request) to the source eAN, and is used to request to acquire session information of the terminal.

步骤 34b、源 eAN向目标 eAN发送 A13-会话信息响应消息 ( A13-Session Information Response ) , 该会话信息响应消息中包括终端的会话信息，如：会话状态信息记录（ SSIR )和扩展会话状态信息记录（ ESSIR )等。 Step 34b: The source eAN sends an A13-Session Information Response message (A13-Session Information Response) to the target eAN, where the session information response message includes session information of the terminal, such as: session state information record (SSIR) and extended session state information record. (ESSIR) and so on.

步骤 34c、目标 eAN向源 eAN发送 A13会话信息确认消息 ( Al 3-Session Information Confirm) , 用于确认收到终端的会话信息。执行步骤 36a。 Step 34c: The target eAN sends an A3-Session Information Confirm message to the source eAN, and is used to confirm the session information of the received terminal. Go to step 36a.

步骤 35、目标 eAN向目标 PCF发送 A9-建立 -A8消息 ( A9-Setup-A8 ) ；该消息属性中数据准备好指示（Data Ready Indicator, 简称 DRI )设置为 1, 并且包含建立多个 A8转发隧道 GRE键值 ( GRE key )信息、 P-GW地址和 P-GW 上行 GRE键值 (GRE key)信息。 Step 35: The target eAN sends an A9-Setup-A8 message (A9-Setup-A8) to the target PCF; the Data Ready Indicator (DRI) in the message attribute is set to 1, and includes establishing multiple A8 forwardings. Tunnel GRE key value (GRE key) information, P-GW address, and P-GW uplink GRE key value (GRE key) information.

步骤 36a、目标 PCF发送 All注册请求（Registration Request, 简称 RRQ ) 消息 (以下称为 A11-RRQ消息 )给 HSGW; A11-RRQ消息包括 P-GW地址和 P-GW的上行 GRE键值 ( GRE key )信息，以及请求 HSGW为终端分配数据转发地址和转发隧道 GRE键值 (GRE key)信息。 Step 36a: The target PCF sends an All-Registration Request (RRQ) message (hereinafter referred to as an A11-RRQ message) to the HSGW. The A11-RRQ message includes a P-GW address and an uplink GRE key value of the P-GW (GRE key). The information, and the requesting HSGW to allocate a data forwarding address and a forwarding tunnel GRE key (GRE key) information to the terminal.

步骤 36b、 HSGW 向目标 PCF 发送 All 注册请求响应（Registration Response, 简称 RRP ) 消息 (以下称为 A11-RRP消息 ) , 该消息包括 HSGW为终端分配的数据转发地址和转发隧道 GRE键值 (GRE key)信息。 Step 36b: The HSGW sends an All-Registration Response (RRP) message (hereinafter referred to as an A11-RRP message) to the target PCF, where the message includes a data forwarding address and a forwarding tunnel GRE key value allocated by the HSGW for the terminal (GRE key). )information.

如果步骤 34a-步骤 34c发生，执行步骤 37; 否则，执行步骤 38。 If steps 34a-34c occur, step 37 is performed; otherwise, step 38 is performed.

步骤 37、 HSGW通知源 PCF译放现有的源 PCF与 HSGW之间的用户面连接 Step 37: The HSGW notifies the source PCF to release the user plane connection between the existing source PCF and the HSGW.

(以下称为 A10连接）。源 PCF随后发起与 HSGW的注册更新过程，释放原来的 A10连接；执行步骤 38。 (hereinafter referred to as A10 connection). The source PCF then initiates a registration update process with the HSGW to release the original A10 connection; step 38 is performed.

步骤 37可与步骤 36b并行进行。 Step 37 can be performed in parallel with step 36b.

步骤 38、目标 PCF发送一个 A9-连接 -A8 ( A9-Connect-A8 ) 消息给目标 eAN; 该消息包括 HSGW为终端分配的数据转发地址和转发隧道 GRE键值 ( GRE key )信息。 Step 38: The target PCF sends an A9-Connect-A8 (A9-Connect-A8) message to the target eAN; the message includes the data forwarding address and the forwarding tunnel GRE key (GRE key) information allocated by the HSGW for the terminal.

步骤 39、目标 eAN为终端分配无线资源之后，目标 eAN向 S101端点 eAN 发送透明传输响应。这里可定义一个新的消息，即 A13-透明传输响应消息 ( A13-Message Transfer Response ) , 该消息便于利用 A13接口发送透明传输响应信息。 A13-透明传输响应消息包括目标 eAN为终端分配的无线资源信息，该无线资源信息包括业务信道指配（HRPD TrafficChannelAssignment, 以下简称 TCA)信息和新的终端标识分配信息（UATIAssignment ) , 其中，业务信道指配信息包括 HSGW为终端分配的数据转发地址和 GRE键值 ( GRE key ) 信息；新的终端标识分配信息包括目标 eAN为终端分配的新终端标识（简称 UATI ) 。 Step 39: After the target eAN allocates radio resources to the terminal, the target eAN sends a transparent transmission response to the S101 endpoint eAN. Here, a new message can be defined, namely A13-Message Transfer Response (A13-Message Transfer Response), which facilitates the transmission of transparent transmission response information using the A13 interface. The A13-transparent transmission response message includes radio resource information allocated by the target eAN for the terminal, where the radio resource information includes HRPD Traffic Channel Assignment (TCA) information and new terminal identifier allocation information (UATIAssignment), where the traffic channel The assignment information includes a data forwarding address and a GRE key (GRE key) information allocated by the HSGW for the terminal; the new terminal identifier allocation information includes a new terminal identifier (UATI) allocated by the target eAN for the terminal.

步骤 310、 S101端点 eAN将无线资源 (业务信道指配信息和终端标识分配信息 )通过 S101直接传输 ( S101 Direct Transfer )消息转发给终端。 S101 直接传输消息中包括 HSGW的数据转发地址和 GRE key信息。 Step 310: The S101 endpoint eAN forwards the radio resource (the traffic channel assignment information and the terminal identifier assignment information) to the terminal through the S101 Direct Transfer message. The S101 direct transmission message includes the data forwarding address and GRE key information of the HSGW.

具体的， S101 端点 eAN将业务信道指配信息和终端标识分配信息通过 S101直接传输消息发送给丽 E, 由丽 E经 E-UTRUN将业务信道指配和终端标识分配信息转发给终端。 Specifically, the S101 endpoint eAN sends the traffic channel assignment information and the terminal identifier assignment information to the MN through the S101 direct transmission message, and the E-UTRUN forwards the service channel assignment and the terminal identifier assignment information to the terminal.

步骤 311、当 E-UTRAN上还存有滞留数据时，可进行数据转发： E-UTRAN 开始通过 S-GW, 采用 HSGW为终端分配的数据转发地址和 GRE key信息，转发数据分组给 HSGW。本步骤为可选步骤。 Step 311: When there is still data in the E-UTRAN, data forwarding may be performed: the E-UTRAN starts to transmit the data packet to the HSGW through the S-GW, using the data forwarding address and the GRE key information allocated by the HSGW for the terminal. This step is an optional step.

步骤 312、终端获得 HRPD的空中接口。 Step 312: The terminal obtains an air interface of the HRPD.

步骤 313、终端发送业务信道完成（ Traff icChannelComplete,简称 TCC ) 消息给目标 eAN。 Step 313: The terminal sends a traffic channel complete (Traff icChannelComplete, referred to as TCC) The message is sent to the target eAN.

步骤 314、目标 eAN在收到 TCC消息后，向目标 PCF发送 A9-更新 -A8 ( A9-Update-A8 ) 消息。 Step 314: After receiving the TCC message, the target eAN sends an A9-Update-A8 (A9-Update-A8) message to the target PCF.

步骤 315、目标 PCF向 HSGW发送 All-RRQ (All-Registration Request ) 消息，并在该消息携带激活态转换的指示（Active Start ) 。 Step 315: The target PCF sends an All-RRQ (All-Registration Request) message to the HSGW, and carries an indication of the active state transition (Active Start) in the message.

步骤 316、 HSGW向目标 PCF发送 A11-RRP ( All-Registration Response ) 消息，该消息包括激活态起始空中链路记录（ Ac t i ve S t a r t A i r 1 i nk Record )。 Step 316: The HSGW sends an A11-RRP (All-Registration Response) message to the target PCF, where the message includes an active state initial airlink record (Ac t i ve S t a r t A i r 1 i nk Record ).

步骤 317、目标 PCF向目标 eAN发送 A9-更新 -A8响应（ A9-Update-A8 Ack ) 消息。 Step 317: The target PCF sends an A9-Update-A8 response (A9-Update-A8 Ack) message to the target eAN.

步骤 318、HSGW为终端创建一个与 P-GW的代理移动 IP( Proxy Mobi le IP, 简称 PMIP)绑定，并且完成其它所需的程序，例如：更新策略信息（update policy information) 、开始计费操作 ( starts accounting operations ) 等。 Step 318: The HSGW creates a binding with the proxy mobile IP (Proxy Mobi le IP, PMIP for short) of the P-GW, and completes other required procedures, for example, update policy information, and starts charging. Start (starting accounting operations) and so on.

步骤 318可由步骤 312触发执行，可与步骤 313并行执行。 Step 318 can be triggered by step 312 and can be performed in parallel with step 313.

步骤 319a、目标 eAN向 S101端点 eAN发送切换完成信息。这里可定义一个新的消息，即 A13-切换完成消息（A13-Handoff Complete) ，该消息便于利用 A13接口发送切换完成信息。 Step 319a: The target eAN sends the handover completion information to the S101 endpoint eAN. Here, a new message, A13-Handoff Complete, can be defined, which is used to send the handover completion message using the A13 interface.

步骤 319b、 SI 01端点 eAN向目标 eAN发送切换完成响应。这里可定义一个新的消息，即 A13-切换完成响应消息（A13-Handoff Complete ACK) , 该消息便于利用 A13接口发送切换完成响应。 Step 319b, the SI 01 endpoint eAN sends a handover completion response to the target eAN. Here, a new message, A13-Handoff Complete ACK, can be defined, which facilitates the transmission of the handover completion response using the A13 interface.

步骤 320、 S101端点 eAN通过 S101隧道通知 MME切换完成 (以下称为 S101-切换完成消息）。 Step 320: The S101 endpoint eAN notifies the MME that the handover is completed through the S101 tunnel (hereinafter referred to as S101-Handover Complete message).

步骤 321、匪 E通过 S101向 S101端点 eAN发送切换完成响应（以下称为 S101-切换完成响应消息）。 Step 321: 匪 E sends a handover completion response (hereinafter referred to as S101-Handover Complete Response message) to the S101 endpoint eAN through S101.

步骤 322、 E-UTRAN, 固 E和 S-GW幹放资源，释放的资源中包括从 S-GW 到 P-GW之间的 PMIP隧道。本实施例当 S101端点 eAN不是目标 eAN时， S101端点 eAN通过 eAN间接口（A13接口），向目标 eAN透明地传输切换消息；目标 eAN为终端分配无线资源，并将无线资源信息通过 eAN间接口透明地传递给 S101端点 eAN, 由 S101端点 eAN通过 S101隧道将无线资源信息发给终端；从而完成 E-UTRAN 到 HRPD的切换。本实施例解决了由于 S101端点 eAN不是目标 eAN而导致的 E-UTRAN跨网切换失败的问题，有效保证了 E-UTRAN向 eHRPD切换成功率，避免在切换过程引起的业务终端，从而保证了业务质量。进一步的，当 S101 端点 eAN与目标 eAN不是同一个 eAN、且目标 eAN上没有存储终端的会话信息时，为解决目标 eAN获取终端会话的问题，本实施例目标 eAN可通过 eAN 间接口（A13接口），向存储有终端会话信息的源 eAN获取终端的会话信息；目标 eAN获取会话的方法简单，有利于降低***复杂度，提供***性能。 Step 322: The E-UTRAN, the solid E, and the S-GW dry release resources, and the released resources include a PMIP tunnel from the S-GW to the P-GW. In this embodiment, when the S101 endpoint eAN is not the target eAN, the S101 endpoint eAN transparently transmits the handover message to the target eAN through the inter-eAN interface (A13 interface); the target eAN allocates the radio resource to the terminal, and the radio resource information passes the eAN interface. Transparently delivered to the S101 endpoint eAN, the S101 endpoint eAN sends radio resource information to the terminal through the S101 tunnel; thus completing the E-UTRAN to HRPD handover. This embodiment solves the problem that the E-UTRAN cross-network handover fails due to the S101 endpoint eAN is not the target eAN, which effectively ensures the E-UTRAN to switch to the eHRPD success rate, avoids the service terminal caused by the handover process, thereby ensuring the service. quality. Further, when the S101 endpoint eAN is not the same eAN as the target eAN, and the session information of the terminal is not stored on the target eAN, in order to solve the problem that the target eAN acquires the terminal session, the target eAN in this embodiment may pass the eAN interface (A13 interface). And obtaining the session information of the terminal from the source eAN storing the terminal session information; the method for obtaining the session by the target eAN is simple, which is beneficial to reducing system complexity and providing system performance.

本实施例跨网切换方法技术方案中，为了保证 S101端点 eAN能够为目标 eAN和 LTE网络间传递必要的消息， S101端点 eAN需要一直维护 S101隧道的上下文信息，直到切换结束。此外，本实施例跨网切换方法技术方案中，源 eAN与 S101端点 eAN还可以是同一个 eAN (图中未示出）。源 eAN保存有终端会话信息，如果 S101端点 eAN和源 eAN是同一个 eAN, 则当终端会话信息迁移到目标 eAN后， S101端点 eAN也需要继续维护该终端 S101隧道的上下文信息，直到切换结束。 In the technical solution of the inter-network handover method in this embodiment, in order to ensure that the S101 endpoint eAN can transmit necessary messages between the target eAN and the LTE network, the S101 endpoint eAN needs to maintain the context information of the S101 tunnel until the handover ends. In addition, in the technical solution of the inter-network handover method in this embodiment, the source eAN and the S101 endpoint eAN may also be the same eAN (not shown). The source eAN stores the terminal session information. If the S101 endpoint eAN and the source eAN are the same eAN, after the terminal session information is migrated to the target eAN, the S101 endpoint eAN also needs to continue to maintain the context information of the terminal S101 tunnel until the handover ends.

图 4a为现有技术终端从 E-UTRAN向 eHRPD网络切换方法流程图。如图 4a所示，现有技术在终端完成 "预注册" 流程后，执行以下切换操作： 4a is a flow chart of a method for switching a terminal from an E-UTRAN to an eHRPD network in the prior art. As shown in FIG. 4a, after the terminal completes the "pre-registration" process, the prior art performs the following switching operations:

步骤 41、 E-UTRAN根据网络实际情况判断终端应该切换到 eHRPD。 Step 41: The E-UTRAN determines that the terminal should switch to the eHRPD according to the actual situation of the network.

步骤 42a、终端经 E-UTRAN向 MME发送 eHRPD网络的切换信息，该切换信息携带 eNB静态配置的扇区标识信息（Sector ID) 。 Step 42: The terminal sends the handover information of the eHRPD network to the MME via the E-UTRAN, where the handover information carries the sector identifier information (Sector ID) statically configured by the eNB.

步骤 42b、固 E向与扇区标识信息相应的 eAN发送切换信息。 Step 42b: The solid E sends the switching information to the eAN corresponding to the sector identification information.

如果 eHRPD网络架构是 A. S0009架构，执行步骤 43a-43c; 如果 eHRPD 网络架构是 A. S0008架构，执行步骤 43c。步骤 43a、 eAN发送 A9-建立 -A8 (A9-Setup-A8) 消息给 PCF，包含建立单个 A8隧道的 GRE键值 ( GRE key )信息。 If the eHRPD network architecture is the A.S0009 architecture, steps 43a-43c are performed; if the eHRPD network architecture is the A.S0008 architecture, step 43c is performed. Step 43a, the eAN sends an A9-Setup-A8 (A9-Setup-A8) message to the PCF, which includes the GRE key (GRE key) information for establishing a single A8 tunnel.

步骤 43b、 PCF决定多 A8连接是必要时， PCF发送一个 A9-译放 -Αδ完成消息（ A9-Release-A8 Complete)给 eAN, 该消息的原因值被设置为 "需要多连接" 。执行步骤 44。 Step 43b: When the PCF determines that multiple A8 connections are necessary, the PCF sends an A9-Release-A8 Complete message to the eAN, and the cause value of the message is set to "requires multiple connections". Go to step 44.

步骤 43c、 eAN发送 A9-建立 -A8 ( A9-Setup-A8 ) 消息给 PCF, 包含建立多个 A8隧道的 GRE键值 ( GRE key )信息。执行步骤 44。 Step 43c: The eAN sends an A9-Set-A8 (A9-Setup-A8) message to the PCF, which includes GRE key information for establishing multiple A8 tunnels. Go to step 44.

步骤 44、 PCF发送 All-RRQ (All-Registration Request )消息给 HSGW; 用于请求 HSGW为终端分配数据转发地址和转发隧道的 GRE键值信息。 Step 44: The PCF sends an All-RRQ (All-Registration Request) message to the HSGW. The request is used to request the HSGW to allocate a data forwarding address and a GRE key value information of the forwarding tunnel.

步骤 45、 HSGW向 PCF发送 All-RRP (All-Registration Response ) 消息；该消息包括 HSGW为终端分配的数据转发地址和转发隧道的 GRE键值信息。 Step 45: The HSGW sends an All-RRP (All-Registration Response) message to the PCF. The message includes the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel.

步骤 46、 PCF发送 A9-连接 -A8 ( A9-Connect-A8 )消息给 eAN; 该消息包括 HSGW为终端分配的数据转发地址和 GRE key信息。 Step 46: The PCF sends an A9-Connect-A8 (A9-Connect-A8) message to the eAN; the message includes a data forwarding address and GRE key information allocated by the HSGW for the terminal.

步骤 47、 eAN为终端分配必要的无线资源，并且通过 S101隧道发送为终端分配的无线资源。 Step 47: The eAN allocates necessary radio resources to the terminal, and sends the radio resources allocated to the terminal through the S101 tunnel.

步骤 48、如果数据转发发生，则 E-UTRAN开始通过 S-GW，采用 HSGW为终端分配的数据转发地址和 GRE key信息，转发数据分组给 HSGW。 Step 48: If data forwarding occurs, the E-UTRAN starts to use the S-GW to forward the data packet to the HSGW by using the data forwarding address and the GRE key information allocated by the HSGW for the terminal.

步驟 49、终端获得 HRPD的空中接口。 Step 49: The terminal obtains an air interface of the HRPD.

步骤 410、终端发送 TCC (TrafficChannelComplete) 消息给 eAN。 Step 410: The terminal sends a TCC (TrafficChannelComplete) message to the eAN.

步骤 411、 eAN在收到 TCC消息后 ,向 PCF发送 A9-更新 -A8( A9-Update-A8 ) 消息，并在该消息携带激活态转换的指示（Active Start) 。 Step 411: After receiving the TCC message, the eAN sends an A9-Update-A8 (A9-Update-A8) message to the PCF, and carries an indication of the active state transition (Active Start).

步骤 412、 PCF向 HSGW发送 All-RRQ ( All-Registration Request ) 消息，该消息包括激活态起始空中链路记录（Active Start Airlink Record) 。 Step 412: The PCF sends an All-RRQ (All-Registration Request) message to the HSGW, where the message includes an Active Start Airlink Record.

步骤 413、 HSGW向 PCF发送 All-RRP ( All-Registration Response ) 消息。 Step 413: The HSGW sends an All-RRP (All-Registration Response) message to the PCF.

步骤 414、 PCF向 eAN发送 A9-更新 -A8响应（ A9，-Update-A8 Ack )消息。步骤 415、 HSGW为终端创建代理移动 IP ( Proxy Mob i le IP, 简称 PMIP ) 绑定。 Step 414: The PCF sends an A9-Update-A8 Response (A9, -Update-A8 Ack) message to the eAN. Step 415: The HSGW creates a Proxy Mob i le IP (PMIP) binding for the terminal.

步骤 416、 e AN向 MME发送 S101切换完成消息。 Step 416: The e AN sends an S101 handover complete message to the MME.

步骤 417、 MME向 eAN发送 S101切换完成响应消息。 Step 417: The MME sends an S101 handover completion response message to the eAN.

步骤 418、 E-UTRAN, MME和 S-GW译放资源，释放的资源中包括从 S-GW 到 P-GW之间的 PMIP隧道。 Step 418: The E-UTRAN, the MME, and the S-GW release the resources, and the released resources include a PMIP tunnel from the S-GW to the P-GW.

发明人在实践现有技术的跨网络切换方法过程中发现，现有技术中，静态配置在 eNB上的扇区标识信息 ( Sector lD )对应扇区所属的目标网络的 eAN 为 S101端点 eAN, 但 S101端点 eAN可能不是终端切换的目标扇区所属的目标 eAN; 特别是在 eAN覆盖边缘的终端，存在 S101端点 eAN与目标 eAN不同的可能性。如果 S101端点 eAN不是目标 eAN, 由于 S101端点 eAN无法为终端直接分配目标 eAN的无线资源，将导致终端从源网络到目标网络的切换失败。对于 E-UTRAN预注册区的 eNB来说，静态配置的扇区标识信息（ Sector lD ) 应该是与 eNB相邻的 HRPD扇区的扇区标识信息（ Sector lD )。若 eNB与多个 HRPD扇区相邻，那么只能选择一个 HRPD扇区的 Sector lD作为 eNB静态配置的扇区标识信息（ Sector lD ) 。图 4b为现有技术 eNB存在二个相邻 HRPD扇区情形的网络架构图。如图 4b所示， S4和 S5表示与 eNB相邻地二个不同的 HRPD扇区; S4属于 eANl , 而 S5属于 eAN2; eNB与 S4和 S5都相邻; eNB上静态配置的扇区标识信息（Sector lD ) 对应的扇区为 S5 ; 假设当终端从 E-UTRAN向 eHRPD网络切换发生时，终端测量的最强导频信号来自扇区 S4的信号。可见， eAN2是 S101端点 eAN, 而 eANl是目标 eAN。 In the prior art, the inventor finds that in the prior art, the sector identification information (Sector IDD) statically configured on the eNB corresponds to the eAN of the target network to which the sector belongs, which is the S101 endpoint eAN, but The S101 endpoint eAN may not be the target eAN to which the target sector of the terminal handover belongs; in particular, at the terminal of the eAN coverage edge, there is a possibility that the S101 endpoint eAN is different from the target eAN. If the S101 endpoint eAN is not the target eAN, the S101 endpoint eAN cannot directly allocate the radio resource of the target eAN to the terminal, which will cause the terminal to fail the handover from the source network to the target network. For the eNB of the E-UTRAN pre-registration area, the statically configured sector identification information (Sector LD) should be the sector identification information ( Sector lD) of the HRPD sector adjacent to the eNB. If the eNB is adjacent to multiple HRPD sectors, only Sector lD of one HRPD sector can be selected as the sector identification information ( Sector lD) of the eNB static configuration. 4b is a network architecture diagram of a situation in which two adjacent HRPD sectors exist in a prior art eNB. As shown in FIG. 4b, S4 and S5 represent two different HRPD sectors adjacent to the eNB; S4 belongs to eAN1, and S5 belongs to eAN2; eNB is adjacent to both S4 and S5; statically configured sector identification information on the eNB (Sector lD) The corresponding sector is S5; It is assumed that when the terminal switches from E-UTRAN to eHRPD network, the strongest pilot signal measured by the terminal comes from the signal of sector S4. It can be seen that eAN2 is the S101 endpoint eAN and eANl is the target eAN.

当 eAN2接收到丽 E发送的直接传输消息（即图 4a中执行步骤 42b之后 ), eAN2根据直接传输消息携带的扇区标识信息信息（Sector lD ( S5 ) ) , 查表获取 S5 的 Pi lotPN 以及相邻扇区的 Pi lotPN , 并且结合位置更新 ( RouteUpda te )消息中的 Pi lotPN和导频强度，可获知终端所接收的最强导频信号来自扇区 S4; 而 S4是位于相邻 eAN (即 eANl ) 的扇区。由于扇区 S4 属于 eANl, 因此 eAN2无法直接为终端分配无线资源，从而导致切换失败。终端通过预注册已经与目标网络 eHRPD协商了会话，但现有技术无法很好将终端的会话转移到目标 eAN上，具体可包括二种情形：如果协商好的会话保存在 S 101端点 eAN上，现有技术无法直接将终端的会话从 S 101端点 eAN 转移到目标 eAN; 或者，如果协商好的会话保存在其它的 eAN上，但该其它的 eAN也不是目标 eAN,现有技术无法很好地实现将终端的会话从保存的 eAN 转移到目标 eAN上。通过上述分析可知，现有技术对于 S101端点 eAN与目标 eAN 不同情形下，如何完成跨网切换以及终端会话转移并没有相应的解决方案，从而导致的网络间切换成功率较低。 When the eAN2 receives the direct transmission message sent by the MN (that is, after performing step 42b in FIG. 4a), the eAN2 obtains the Pi lotPN of the S5 according to the sector identification information information (Sector lD (S5)) carried in the direct transmission message. PilotPN of the adjacent sector, and combining the Pi lotPN and the pilot strength in the Location Update message, it can be known that the strongest pilot signal received by the terminal is from sector S4; and S4 is located in the adjacent eAN ( That is, the sector of eANl). Due to sector S4 It belongs to eANl, so eAN2 cannot directly allocate radio resources to the terminal, which causes the handover to fail. The terminal has negotiated the session with the target network eHRPD through the pre-registration, but the prior art cannot transfer the session of the terminal to the target eAN. Specifically, the two scenarios may be included: If the negotiated session is saved on the S101 endpoint eAN, The prior art cannot directly transfer the session of the terminal from the S101 endpoint eAN to the target eAN; or, if the negotiated session is saved on another eAN, but the other eAN is not the target eAN, the prior art cannot be well The transfer of the terminal's session from the saved eAN to the target eAN is implemented. According to the above analysis, the prior art has no corresponding solution for how to complete the cross-network handover and the terminal session transfer in different situations of the S101 endpoint eAN and the target eAN, so that the handover success rate between the networks is low.

区别于现有技术的是，本实施例当 S101端点 eAN与目标 eAN不同时， S101 端点 eAN通过 eAN间接口（ A13接口），向目标 eAN透明地传输切换消息；目标 eAN为终端分配无线资源，并将无线资源信息通过 eAN间接口透明地传递给 S101端点 eAN, 由 S101端点 eAN通过 S101隧道将无线资源信息发给终端；从而完成 E-UTRAN到 eHRPD的切换。本实施例解决了由于 S101端点 eAN 不是目标 eAN而导致的 E-UTRAN跨网切换失败的问题，有效保证了 E-UTRAN 向 eHRPD切换成功率，避免在切换过程引起的业务中断，从而保证了业务质量。进一步的，当 S101端点 eAN与目标 eAN不是同一个 eAN、且目标 eAN上没有存储终端的会话信息时，为解决目标 eAN获取终端会话的问题，本实施例目标 eAN可通过 eAN间接口（ A13接口），向存储有终端会话信息的源 eAN 获取终端的会话信息，使得目标 eAN可利用现有技术获取会话，从而解决当 S101端点 eAN与目标 eAN不同时，终端会话信息转移到目标 eAN上的技术问题，方法简单，有利于降低***复杂度，提供***性能。 Different from the prior art, in this embodiment, when the S101 endpoint eAN is different from the target eAN, the S101 endpoint eAN transparently transmits the handover message to the target eAN through the inter-eAN interface (A13 interface); the target eAN allocates the radio resource to the terminal. The radio resource information is transparently transmitted to the S101 endpoint eAN through the inter-eAN interface, and the S101 endpoint eAN sends the radio resource information to the terminal through the S101 tunnel; thereby completing the E-UTRAN to eHRPD handover. This embodiment solves the problem that the E-UTRAN cross-network handover fails due to the S101 endpoint eAN is not the target eAN, which effectively ensures the E-UTRAN to switch to the eHRPD success rate, avoids service interruption caused by the handover process, thereby ensuring the service. quality. Further, when the S101 endpoint eAN is not the same eAN as the target eAN, and the session information of the terminal is not stored on the target eAN, in order to solve the problem that the target eAN acquires the terminal session, the target eAN in this embodiment may pass the eAN interface (A13 interface). Obtaining the session information of the terminal from the source eAN storing the terminal session information, so that the target eAN can acquire the session by using the existing technology, thereby solving the technology that the terminal session information is transferred to the target eAN when the S101 endpoint eAN is different from the target eAN. The problem, the method is simple, which helps to reduce system complexity and provide system performance.

图 5为本发明跨网切换方法第三实施例流程图。本实施例与图 3所示的实施例的区别在于：本实施例是以 eHRPD中 A. S0009架构为例（如图 2c所示），说明当 S101端点 eAN与目标 eAN不同时，完成从 E-UTRAN到 eHRPD的切换的技术方案。 A. S0009架构的会话协商和移动性管理功能在 PCF上，会话保存在 PCF上，因此会话的转移是在 PCF之间进行， PCF之间通过 A13接口通信， AN之间通过 A15接口通信。如图 5所示，本实施例包括： FIG. 5 is a flowchart of a third embodiment of an inter-network handover method according to the present invention. The difference between this embodiment and the embodiment shown in FIG. 3 is that the embodiment is based on the A. S0009 architecture in the eHRPD (as shown in FIG. 2c), and the completion of the E is completed when the S101 endpoint eAN is different from the target eAN. - Technical solution for handover of UTRAN to eHRPD. A. Session negotiation and mobility management functions of the S0009 architecture on the PCF, session preservation On the PCF, therefore, the transfer of the session is between the PCFs, the PCFs communicate via the A13 interface, and the ANs communicate via the A15 interface. As shown in FIG. 5, this embodiment includes:

步骤 51-步骤 52b与图 3所示实施例步骤 31-步骤 32b相似。 Step 51 - Step 52b is similar to Step 31 - Step 32b of the embodiment shown in Figure 3.

步骤 53、 S101 端点 eAN 收到 MME 通过 S101 隧道发送的切换信息 ( Connect ionRequest + RouteUpdate )后，根据切换信息获取目标 eAN信息，向目标 eAN发送终端的切换信息。这里可定义一个新的消息，即 A15-透明传输消息（A15-Message Transfer ) , 该消息便于利用 A15接口转发的终端切换信息等。 A15-透明传输消息包括步骤 52b 中的切换信息 ( Connect ionRequest + RouteUpdate ) 、 E-UTRUN静态酉己置的扇区标 i只信息- ( SectorlD) , P-GW地址和 P-GW的上行 GRE键值信息。 Step 53: After receiving the handover information (ConnectionRequest + RouteUpdate) sent by the MME through the S101 tunnel, the endpoint eAN obtains the target eAN information according to the handover information, and sends the handover information of the terminal to the target eAN. Here, a new message can be defined, that is, A15-Transportation Message (A15-Message Transfer), which facilitates the use of terminal switching information forwarded by the A15 interface. The A15-transparent transmission message includes the handover information (ConnectionRequest + RouteUpdate) in step 52b, the sector identifier i information of the E-UTRUN static state - (SectorlD), the P-GW address, and the uplink GRE key of the P-GW. Value information.

步骤 54、目标 eAN向目标 PCF发送 A9-建立 -A8消息（ A9-Setup-A8 ) ；该消息属性中数据准备好指示（Data Ready Indicator, 简称 DRI )设置为 1, 并且包含建立单个 A8隧道 GRE键值 ( GRE key )信息、 P-GW地址和 P-GW上行 GRE键值 (GRE key)信息；该消息同时要求获取 HSGW为终端分配的数据转发地址和转发隧道的 GRE 键值信息；该消息 A9 指示项的会话信息请求 ( Session Information Required)域设置为 1, 用以请求从目标 PCF获得终端的会话信息记录 (Session Information Record ) 。 Step 54: The target eAN sends an A9-Setup-A8 message (A9-Setup-A8) to the target PCF; the Data Ready Indicator (DRI) in the message attribute is set to 1, and includes establishing a single A8 tunnel GRE. The key value (GRE key) information, the P-GW address, and the P-GW uplink GRE key value (GRE key) information; the message also requires obtaining the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel; The Session Information Required field of the A9 indicator is set to 1 to request the session information record (Session Information Record) of the terminal from the target PCF.

目标 PCF收到 A9-建立 -A8消息 ( A9-Setup-A8 ) 消息后，判断自身是否存储有终端的会话信息，如果有执行步骤 56; 否则，获取存储有终端会话信息的 PCF (以下称为源 PCF )地址信息，执行步骤 55a。 After receiving the A9-Setup-A8 message (A9-Setup-A8) message, the target PCF determines whether it stores the session information of the terminal, and if yes, performs step 56; otherwise, acquires the PCF storing the terminal session information (hereinafter referred to as Source PCF) address information, go to step 55a.

目标 PCF可根据切换信息中包括的 UATI信息，获知存储有终端会话信息的 PCF信息。如果目标 PCF获知自身存储有终端会话信息，执行步骤 56; 否贝' J, 向存储有终端会话信息的其它 PCF (以下称为源 PCF (SourcePCF) )获取终端的会话信息，执行步骤 55a。 The target PCF can know the PCF information storing the terminal session information based on the UATI information included in the handover information. If the target PCF knows that the terminal session information is stored in itself, step 56 is performed; otherwise, the session information of the terminal is obtained from the other PCF (hereinafter referred to as the source PCF (Source PCF)) storing the terminal session information, and step 55a is performed.

步骤 55a、目标 PCF向源 PCF发送 A13-会话信息请求消息（ A13-Session Step 55a: The target PCF sends an A13-session information request message to the source PCF (A13-Session)

Information Request ) , 用于请求获取终端的会话信息。步骤 55b、源 PCF向目标 PCF发送 Al 3-会话信息响应消息 ( A13-Session Information Response ) , 会话信息响应消息包括终端的会话信息，如：会话状态信息记录（SSIR)和扩展会话状态信息记录（ESSIR)等。 Information Request ) , used to request to obtain session information of the terminal. Step 55b: The source PCF sends an Al 3-session information response message (A13-Session Information Response) to the target PCF, where the session information response message includes session information of the terminal, such as: session state information record (SSIR) and extended session state information record ( ESSIR) and so on.

步骤 55c、目标 PCF向源 PCF发送 A13会话信息确认消息（ A13-Session Information Confirm) , 用于确认收到终端的会话信息。执行步骤 56。 Step 55c: The target PCF sends an A13-Session Information Confirm message to the source PCF to confirm the session information of the received terminal. Go to step 56.

步骤 56、当目标 PCF决定建立多 Α8连接是必要时，目标 PCF发送 Α9- 释放 -Α8完成消息 ( A9-Release-A8 Complete) 消息给目标 eAN, 该消息中携带 SSIRs信息，且消息原因值被设置为 "需要多连接" 。 Step 56: When the target PCF decides to establish a multi-Α8 connection, the target PCF sends a Α9-Release-A8 Complete message to the target eAN, where the message carries the SSIRs information, and the message cause value is Set to "requires multiple connections".

步骤 57、目标 eAN发送 A9-建立 -A8 ( A9-Setup-A8 ) 消息给目标 PCF, 并将消息属性中数据准备好指示（DRI )设置为 1, 且包括建立多个 A8 隧道的 GRE键值信息；该消息还包括步骤 53中收到的 P-GW地址和 P-GW的上行 GRE键值信息。 Step 57: The target eAN sends an A9-Setup-A8 (A9-Setup-A8) message to the target PCF, and sets the data ready indication (DRI) in the message attribute to 1, and includes establishing GRE key values of multiple A8 tunnels. The message further includes the P-GW address received in step 53 and the uplink GRE key value information of the P-GW.

步骤 58a、目标 PCF发送 All-RRQ (All-Registration Request )消息给 HSGW; 该消息包括 P-GW地址和上行 GRE key的信息，用于请求 HSGW为终端分配数据转发地址和转发隧道的 GRE键值信息。 Step 58a: The target PCF sends an All-RRQ (All-Registration Request) message to the HSGW. The message includes information of the P-GW address and the uplink GRE key, and is used to request the HSGW to allocate a data forwarding address and a GRE key value of the forwarding tunnel for the terminal. information.

步骤 58b、 HSGW向目标 PCF发送 All-RRP(All-RegistrationResponse) 消息；该消息包括 HSGW为终端分配的数据转发地址和转发隧道的 GRE键值信息。 Step 58b: The HSGW sends an All-RRP (All-RegistrationResponse) message to the target PCF. The message includes the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel.

如果步骤 55a-步骤 55c发生，执行步骤 59; 否则，执行步骤 510。 If steps 55a-55c occur, step 59 is performed; otherwise, step 510 is performed.

步骤 59, HSGW通知源 PCF译放现有的源 PCF与 HSGW之间的用户面连接 , 即释放 A10连接。 Step 59: The HSGW notifies the source PCF to release the user plane connection between the existing source PCF and the HSGW, that is, release the A10 connection.

源 PCF随后发起与 HSGW的注册更新过程，释放原来的 A10连接；执行步骤 510。 The source PCF then initiates a registration update process with the HSGW to release the original A10 connection; step 510 is performed.

步骤 59可与步骤 58b并行进行。 Step 59 can be performed in parallel with step 58b.

步骤 510、目标 PCF发送 A9-连接 -A8 ( A9-Connect-A8 )消息给目标 eAN; 该消息包括 HSGW为终端分配的数据转发地址和转发隧道的 GRE键值信息。步骤 511、目标 eAN为终端分配无线资源，之后，目标 eAN向 S101端点 eAN发送透明传输响应。这里可定义一个新的消息，即 A15-透明传输响应消息 ( A15-Message Transfer Response ) , 该消息便于利用 A15接口发送透明传输响应信息。 A15-透明传输响应消息包括目标 eAN为终端分配的无线资源信息，该无线资源信息包括业务信道指配信息和终端标识分配信息，其中，业务信道指配信息包括 HSGW为终端分配的数据转发地址和 GRE键值信息；终端标识分配信息包括目标 eAN为终端分配的新终端标识。 Step 510: The target PCF sends an A9-Connect-A8 (A9-Connect-A8) message to the target eAN. The message includes the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel. Step 511: The target eAN allocates radio resources to the terminal, and then the target eAN sends a transparent transmission response to the S101 endpoint eAN. Here, a new message, A15-Message Transfer Response (A15-Message Transfer Response), can be defined, which facilitates the transmission of transparent transmission response information using the A15 interface. The A15-transmission transmission response message includes the radio resource information allocated by the target eAN for the terminal, where the radio resource information includes the service channel assignment information and the terminal identifier allocation information, where the service channel assignment information includes a data forwarding address allocated by the HSGW for the terminal. GRE key value information; the terminal identity allocation information includes a new terminal identity assigned by the target eAN to the terminal.

步骤 512、 S101端点 eAN将无线资源（业务信道指配信息和终端标识分配信息 )通过 S101接口转发给终端。 Step 512: The S101 endpoint eAN forwards the radio resource (the traffic channel assignment information and the terminal identifier assignment information) to the terminal through the S101 interface.

具体的， S101 端点 eAN将业务信道指配信息和终端标识分配信息通过 Specifically, the S101 endpoint eAN passes the traffic channel assignment information and the terminal identifier assignment information.

S101直接传输 ( S101 Direct Transfer ) 消息发送给 MME, 由 MME经 E-UTRUN 将业务信道指配和终端标识分配信息转发给终端。 The S101 Direct Transfer message is sent to the MME, and the MME forwards the traffic channel assignment and the terminal identifier assignment information to the terminal via E-UTRUN.

步骤 513、当 E-UTRAN上还存有滞留数据时，可进行数据转发： E-UTRAN 开始通过 S-GW, 采用 HSGW为终端分配的数据转发地址和转发隧道的 GRE键值信息，转发数据分组给 HSGW。本步骤为可选步骤。 Step 513: When the stagnation data is still stored on the E-UTRAN, the data forwarding may be performed: the E-UTRAN starts to use the S-GW, and uses the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel to forward the data packet. To the HSGW. This step is an optional step.

步骤 514、终端获得 HRPD的空中接口。 Step 514: The terminal obtains an air interface of the HRPD.

步骤 515、终端发送 TCC消息给目标 eAN。 Step 515: The terminal sends a TCC message to the target eAN.

步骤 516、目标 eAN在收到 TCC消息后，向目标 PCF发送 A9-更新 -A8 ( A9-Update-A8 ) 消息。 Step 516: After receiving the TCC message, the target eAN sends an A9-Update-A8 (A9-Update-A8) message to the target PCF.

步骤 517、目标 PCF向 HSGW发送 All-RRQ (All-Registration Request ) 消息，并在该消息携带激活态转换的指示（Active Start ) 。 Step 517: The target PCF sends an All-RRQ (All-Registration Request) message to the HSGW, and carries an indication of an active state transition (Active Start).

步骤 518、 HSGW向目标 PCF发送 All-RRP(All-RegistrationResponse) 消息，该消息包括激活态起始空中链路记录（ Active Start Airlink Record )₀ 步骤 519、目标 PCF向目标 eAN发送 A9-更新 -A8响应（ A9-Update-A8 Ack ) 消息。 Step 518: The HSGW sends an All-RRP (All-RegistrationResponse) message to the target PCF, where the message includes an Active Start Airlink Record ₀ step 519, and the target PCF sends an A9-Update-A8 to the target eAN. Response (A9-Update-A8 Ack) message.

步骤 520、 HSGW为终端创建一个与 P-GW的代理移动 IP( Proxy Mobile IP, 简称 PMIP)绑定，并且完成其它所需的程序，例如：更新策略信息（update policy information) 、开始计费操作 ( starts accounting operations ) 等。 Step 520: The HSGW creates a proxy mobile IP (Proxy Mobile IP) with the P-GW for the terminal. Referred to as PMIP), and complete other required programs, such as: update policy information, starts accounting operations, and so on.

步骤 520可由步骤 514触发执行，可与步骤 515并行执行。 Step 520 can be triggered by step 514 and can be performed in parallel with step 515.

步骤 521a、目标 eAN向 S101端点 eAN发送切换完成信息。这里可定义一个新的消息，即 A15-切换完成消息 ( A15-Handoff Complete) , 该消息便于利用 A15接口发送切换完成信息。 Step 521a: The target eAN sends handover completion information to the S101 endpoint eAN. Here, a new message, A15-Handoff Complete, can be defined, which is used to send the handover completion message using the A15 interface.

步骤 521b、 SI 01端点 eAN向目标 eAN发送切换完成响应。这里可定义一个新的消息，即 A15-切换完成响应消息 ( A15-Handoff Complete ACK ) , 该消息便于利用 A15接口发送切换完成响应。 Step 521b, the SI 01 endpoint eAN sends a handover completion response to the target eAN. Here, a new message, A15-Handoff Complete ACK, can be defined, which facilitates the transmission of the handover completion response using the A15 interface.

步骤 522、 S101端点向 ΜΜΕ发送 S101-切换完成消息。 Step 522: The S101 endpoint sends an S101-Handover Complete message to the UI.

步骤 523、 ΜΜΕ向 S101端点 eAN发送 S101-切换完成响应消息。 Step 523: Send a S101-Handover Complete Response message to the S101 endpoint eAN.

步骤 524、 E-UTRAN, MME和 S-GW译放资源，释放的资源中包括从 S-GW 到 P-GW之间的 PMIP隧道。 Step 524: The E-UTRAN, the MME, and the S-GW release the resources, and the released resources include a PMIP tunnel from the S-GW to the P-GW.

本实施例当 S101端点 eAN与目标 eAN不同时， S101端点 eAN通过 eAN 间接口（A15接口），向目标 eAN透明地传输切换消息 ( Connect ionRequest + RouteUpdate )；目标 eAN向目标 PCF转发切换信息，由目标 PCF为终端分配无线资源，并将无线资源信息发送给目标 eAN, 目标 eAN通过 eAN间接口透明地传递给 S101端点 eAN, 由 S101端点 eAN通过 S101隧道将该无线资源信息发给终端；从而完成 E-UTRAN到 HRPD的切换。本实施例解决了在 HRPD 网络 A. S0009架构下，当 S101端点 eAN与目标 eAN不同时， E-UTRAN到 eHRPD 的跨接入技术切换问题，有效保证了 E-UTRAN向 eHRPD切换成功率。进一步的，当 S101端点 eAN与目标 eAN不是同一个 eAN、且目标 PCF上没有存储终端的会话信息时，为解决目标 PCF获取终端会话的问题，本实施例目标 PCF 可通过 PCF间接口（ A13接口），向存储有终端会话信息的源 PCF获取终端的会话信息，从而使得目标 PCF可利用现有技术获取会话，方法简单，有利于降低***复杂度，提供***性能。 In this embodiment, when the S101 endpoint eAN is different from the target eAN, the S101 endpoint eAN transparently transmits a handover message (ConnectionRequest+RouteUpdate) to the target eAN through the inter-eAN interface (A15 interface); the target eAN forwards the handover information to the target PCF, The target PCF allocates the radio resource to the terminal, and sends the radio resource information to the target eAN. The target eAN is transparently transmitted to the S101 endpoint eAN through the inter-eAN interface, and the S101 endpoint eAN sends the radio resource information to the terminal through the S101 tunnel; E-UTRAN to HRPD handover. This embodiment solves the problem that the E-UTRAN to eHRPD cross-access technology handover problem when the S101 endpoint eAN is different from the target eAN under the HRPD network A. S0009 architecture, effectively ensuring the E-UTRAN handover success rate to the eHRPD. Further, when the S101 endpoint eAN and the target eAN are not the same eAN, and the session information of the terminal is not stored on the target PCF, in order to solve the problem that the target PCF acquires the terminal session, the target PCF in this embodiment may pass the interface between the PCF (A13 interface). Obtaining the session information of the terminal from the source PCF storing the terminal session information, so that the target PCF can acquire the session by using the existing technology, and the method is simple and advantageous. To reduce system complexity and provide system performance.

图 6为本发明跨网切换方法第四实施例流程图。本实施例与图 3所示的实施例的区别在于：本实施例在进行无线资源信息（业务信道指配信息和新的终端标识信息 )透明传输过程中，是通过目标 eAN基于 S101隧道直接发送给 MME, 而不需要通过 S 101端点 eAN进行转发。如图 6所示，本实施例包括： FIG. 6 is a flowchart of a fourth embodiment of an inter-network handover method according to the present invention. The difference between this embodiment and the embodiment shown in FIG. 3 is that: in this embodiment, the transparent transmission process of the radio resource information (the traffic channel assignment information and the new terminal identifier information) is directly sent by the target eAN based on the S101 tunnel. The MME is sent without forwarding through the S 101 endpoint eAN. As shown in FIG. 6, this embodiment includes:

步骤 61-步骤 62b与图 3所示实施例步骤 31-步骤 32b相似。 Step 61 - Step 62b is similar to Step 31 - Step 32b of the embodiment shown in Figure 3.

步骤 63a、 S101 端点 eAN 收到 MME 通过 S101 隧道发送的切换信息 ( Connect ionRequest + RouteUpdate )后，根据切换信息获取目标 eAN信息，向目标 eAN发送 A13-透明传输消息（A13-Message Transfer ) , 该消息包括步骤 32b 中的切换信息 ( Connect ionRequest + RouteUpdate ) 、 E-UTRUN静态配置的扇区标识信息（ SectorlD) , P-GW地址和 P-GW的上行 GRE键值信息、以及丽 E的地址信息。 After receiving the handover information (ConnectionRequest + RouteUpdate) sent by the MME through the S101 tunnel, the endpoint eAN obtains the target eAN information according to the handover information, and sends an A13-Transportation message (A13-Message Transfer) to the target eAN. The switch information (Connect ionRequest + RouteUpdate) in step 32b, the sector identification information (SectorlD) of the E-UTRUN static configuration, the P-GW address and the uplink GRE key value information of the P-GW, and the address information of the MN are included.

步骤 63b、目标 eAN 向 S101 端点 eAN 发送 A13-透明传输响应消息 ( Al 3-Message Transfer Response ) 。 Step 63b: The target eAN sends an A13-Transformed Transmission Response message (Al 3-Message Transfer Response) to the S101 endpoint eAN.

步骤 64-步骤 68与图 3所示实施例步骤 34-步骤 38相似。 Steps 64-68 are similar to steps 34-38 of the embodiment shown in FIG.

步骤 69、目标 eAN为终端分配无线资源，之后，目标 eAN通过 S101隧道向 MME发送 S101直接传输（S101 Direct Transfer ) 消息，该 S101直接传输消息包括目标 eAN为终端分配的无线资源信息，该无线资源信息包括业务信道指配信息和终端标识分配信息，此外， S101 直接传输消息包括 HSGW 为终端分配的数据转发地址和转发隧道的 GRE键值信息。 Step 69: The target eAN allocates radio resources to the terminal, and then the target eAN sends a S101 Direct Transfer message to the MME through the S101 tunnel, where the S101 direct transmission message includes the radio resource information allocated by the target eAN for the terminal, the radio resource. The information includes the service channel assignment information and the terminal identifier assignment information. In addition, the S101 direct transmission message includes the data forwarding address allocated by the HSGW for the terminal and the GRE key value information of the forwarding tunnel.

步骤 610、 MME将 HRPD的无线资源信息（业务信道指配信息和终端标识分配信息 )经 E-UTRUN转发给终端。 Step 610: The MME forwards the radio resource information (the traffic channel assignment information and the terminal identifier assignment information) of the HRPD to the terminal through the E-UTRUN.

步骤 611-步骤 618与图 3所示实施例步骤 311-步骤 318相似。 Step 611 - Step 618 is similar to step 311 - step 318 of the embodiment shown in FIG.

步骤 619、目标 eAN通过 S101隧道向 MME发送 S101-切换完成消息。步骤 620、固 E向目标 eAN发送 S101-切换完成响应消息。步骤 621、 E-UTRAN, MME和 S-GW译放资源，释放的资源中包括从 S-GW 到 P-GW之间的 PMIP隧道。 Step 619: The target eAN sends an S101-Handover Complete message to the MME through the S101 tunnel. Step 620: The solid E sends an S101-Handover Complete Response message to the target eAN. Step 621: The E-UTRAN, the MME, and the S-GW release the resources, and the released resources include a PMIP tunnel from the S-GW to the P-GW.

本实施例在图 3所示实施例实现技术效果的基础上，通过目标 eAN向固 E 发送业务信道指配信息和终端标识分配信息等无线资源信息，从而简化了隧道传输目标 eAN为终端分配的无线资源信息的流程，有利于降低***复杂度，提高***性能。 In the embodiment, on the basis of the technical effect of the embodiment shown in FIG. 3, the target eAN sends the radio resource information such as the traffic channel assignment information and the terminal identifier allocation information to the solid E, thereby simplifying the tunnel transmission target eAN allocated to the terminal. The process of wireless resource information helps to reduce system complexity and improve system performance.

图 7为本发明跨网切换方法第五实施例流程图。本实施例与图 5所示的实施例的区别在于：本实施例在进行无线资源信息（业务信道指配信息和新的终端标识信息）透明传输过程中，是通过目标 eAN基于 S101隧道直接发送给 MME , 而不需要通过 S101端点 eAN进行转发。如图 7所示，本实施例包括：步骤 71-步骤 72b与图 5所示实施例步骤 51-步骤 52b相似。 FIG. 7 is a flowchart of a fifth embodiment of an inter-network handover method according to the present invention. The difference between this embodiment and the embodiment shown in FIG. 5 is that: in this embodiment, the transparent transmission process of the radio resource information (the traffic channel assignment information and the new terminal identifier information) is directly sent by the target eAN based on the S101 tunnel. The MME is sent without forwarding through the S101 endpoint eAN. As shown in FIG. 7, this embodiment includes: Step 71 - Step 72b is similar to step 51 - step 52b of the embodiment shown in FIG.

步骤 73a、 S101 端点 eAN 收到 MME 通过 S101 隧道发送的切换信息 ( Connec t i onReques t + RouteUpda te )后，根据切换信息获取目标 eAN信息，向目标 eAN发送 A15-透明传输消息（ A15-Mes sage Transfer ) , 该消息包括步骤 72b 中的切换信息 ( Connec t ionReques t + RouteUpda te ) 、 E-UTRUN静态配置的扇区标识信息（ Sec tor l D ) , P-GW地址和 P-GW的上行 GRE键值信息、以及丽 E的地址信息。 Steps 73a, S101: After receiving the handover information (Connec ti onReques t + RouteUpda te ) sent by the MME through the S101 tunnel, the endpoint eAN obtains the target eAN information according to the handover information, and sends an A15-transparent transmission message to the target eAN (A15-Mes sage Transfer). The message includes the switching information (Connec t ionReques t + RouteUpda te ) in step 72b, the sector identification information (Sec tor l D ) of the E-UTRUN static configuration, the P-GW address, and the uplink GRE key of the P-GW. Value information, and address information of 丽E.

步骤 73b、目标 eAN 向 S101 端点 eAN 发送 A15-透明传输响应消息 ( A15-Mes sage Transfer Ack ) 。 Step 73b: The target eAN sends an A15-Mes sage Transfer Ack to the S101 endpoint eAN.

步骤 74a-步骤 710与图 5所示实施例步骤 54a-步骤 510相似。 Step 74a-step 710 is similar to steps 54a-510 of the embodiment shown in FIG.

步骤 71 1、目标 eAN为终端分配无线资源，之后，目标 eAN通过 S101隧道向 MME发送 S101直接传输（S101 Di rec t Transfer ) 消息，该 S101直接传输消息包括目标 eAN为终端分配的无线资源信息，该无线资源信息包括业务信道指配信息和终端标识分配信息，此外， S1 01 直接传输消息包括 HSGW 为终端分配的数据转发地址和转发隧道的 GRE键值信息；终端标识分配信息包括目标 eAN为终端分配的新终端标识。步骤 712、 MME将 HRPD的无线资源信息（业务信道指配信息和终端标识分配信息 )经 E-UTRUN转发给终端。 Step 71: The target eAN allocates a radio resource to the terminal, and then the target eAN sends a S101 Di rec t Transfer message to the MME through the S101 tunnel, where the S101 direct transmission message includes the radio resource information allocated by the target eAN for the terminal. The radio resource information includes the service channel assignment information and the terminal identifier allocation information. In addition, the S1 01 direct transmission message includes a data forwarding address allocated by the HSGW for the terminal and GRE key value information of the forwarding tunnel. The terminal identifier allocation information includes the target eAN as the terminal. The assigned new terminal ID. Step 712: The MME forwards the radio resource information (the traffic channel assignment information and the terminal identifier assignment information) of the HRPD to the terminal through the E-UTRUN.

步骤 71 3-步骤 720与图 5所示实施例步骤 51 3-步骤 520相似。 Step 71 3-Step 720 is similar to step 51 3-step 520 of the embodiment shown in FIG.

步骤 721、目标 eAN通过 S 1 01隧道向丽 E发送 S 1 01 -切换完成消息。步骤 722、固 E向目标 eAN发送 S 1 01-切换完成响应消息。 Step 721: The target eAN sends a S 1 01 - handover complete message to the MN through the S 1 01 tunnel. Step 722: The solid E sends a S1 01-Handover Complete Response message to the target eAN.

步骤 723、 E-UTRAN , MME和 S-GW译放资源，释放的资源中包括从 S-GW 到 P-GW之间的 PMIP隧道。 Step 723: The E-UTRAN, the MME, and the S-GW release the resources, and the released resources include a PMIP tunnel from the S-GW to the P-GW.

本实施例在图 5所示实施例实现技术效果的基础上，通过目标 eAN向固 E 发送业务信道指配信息和终端标识分配信息等无线资源信息，从而简化了隧道传输目标 eAN为终端分配的无线资源信息的流程，有利于降低***复杂度，提高***性能。 On the basis of the technical effects of the embodiment shown in FIG. 5, the present embodiment transmits the radio resource information such as the traffic channel assignment information and the terminal identifier allocation information to the solid E through the target eAN, thereby simplifying the tunnel transmission target eAN allocated to the terminal. The process of wireless resource information helps to reduce system complexity and improve system performance.

图 8为本发明接入网设备实施例结构图。如图 8所示，本实施例包括解析模块 81、判断模块 82和通信模块 8 3。 FIG. 8 is a structural diagram of an embodiment of an access network device according to the present invention. As shown in FIG. 8, the embodiment includes an analysis module 81, a determination module 82, and a communication module 83.

解析模块 81用于根据接收的源网络侧设备转发的终端的切换信息，获取目标接入网设备信息。 The parsing module 81 is configured to obtain target access network device information according to the received handover information of the terminal forwarded by the source network side device.

判断模块 82用于根据解析模块 81获取的目标接入网设备信息，判断该目标接入网设备是否为本接入网设备。 The determining module 82 is configured to determine, according to the target access network device information acquired by the parsing module 81, whether the target access network device is the access network device.

通信模块 83用于当判断模块 82判断出目标接入网设备与本接入网设备不同时，向目标接入网设备发送切换信息；以及接收目标接入网设备根据切换信息为终端分配的无线资源信息，并通过源网络侧设备向终端转发无线资源信息。 The communication module 83 is configured to: when the determining module 82 determines that the target access network device is different from the local access network device, send the handover information to the target access network device; and receive the wireless information that the target access network device allocates to the terminal according to the handover information. The resource information is forwarded to the terminal by the source network side device.

本实施例当判断模块判断出接入网设备自身不是终端要切换到的目标扇区所属的目标接入网设备时，由通信模块将源网络侧设备转发的终端切换信息发送给目标接入网设备，并将目标接入网设备为终端分配无线资源信息通过源网络侧设备发送给终端，从而解决了当接收源网络侧设备转发的终端切换信息的接入网设备、与终端实际要切换到的目标扇区所属的目标接入网设备不同 (即本接入网设备与目标接入网设备不同）时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In this embodiment, when the determining module determines that the access network device itself is not the target access network device to which the target sector to which the terminal is to be switched, the communication module sends the terminal switching information forwarded by the source network side device to the target access network. The device, and the target access network device allocates radio resource information to the terminal, and sends the information to the terminal through the source network side device, thereby solving the access network device that receives the terminal switching information forwarded by the source network side device, and the terminal actually switches to the terminal. Target access network to which the target sector belongs When the standby device is different (that is, the access network device is different from the target access network device), the inter-network handover problem of the terminal from the source network to the target network improves the success rate of the terminal cross-network handover.

图 9a为本发明另一接入网设备第一实施例结构图。如图 9a所示，本实施例包括接收模块 91、无线资源分配模块 92和发送模块 93。 FIG. 9a is a structural diagram of a first embodiment of another access network device according to the present invention. As shown in FIG. 9a, the embodiment includes a receiving module 91, a radio resource allocation module 92, and a transmitting module 93.

接收模块 91 用于接收端点接入网设备发送的源网络侧设备转发的终端的切换信息。 The receiving module 91 is configured to receive, by the endpoint access network device, handover information of the terminal forwarded by the source network side device.

无线资源分配模块 92用于根据接收模块 91接收的切换信息为终端分配无线资源。 The radio resource allocation module 92 is configured to allocate radio resources to the terminal according to the handover information received by the receiving module 91.

发送模块 93用于将无线资源分配模块 92分配的无线资源信息，发送给源网络侧设备，触发源网络侧设备转发无线资源信息给终端；或者，将无线资源分配模块 92分配的无线资源信息，发送给端点接入网设备，触发端点接入网设备通过源接入网将无线资源信息转发给终端。 The sending module 93 is configured to send the radio resource information allocated by the radio resource allocation module 92 to the source network side device, and trigger the source network side device to forward the radio resource information to the terminal; or the radio resource information allocated by the radio resource allocation module 92, Sending to the endpoint access network device, triggering the endpoint access network device to forward the radio resource information to the terminal through the source access network.

本实施例当接收模块接收到端点接入网设备转发的源网络侧终端的切换信息时，触发无线资源分配模块为终端分配无线资源，并将无线资源信息直接通过源网络侧设备转发给终端或经端点接入网设备通过源网络侧设备转发给终端，从而解决了当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到的目标扇区所属的目标接入网设备不同（即端点接入网设备与本接入网设备不同）时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In this embodiment, when the receiving module receives the switching information of the source network side terminal that is forwarded by the endpoint access network device, the wireless resource allocation module is triggered to allocate the wireless resource to the terminal, and the wireless resource information is directly forwarded to the terminal through the source network side device or The endpoint access network device forwards the terminal to the terminal through the source network side device, thereby solving the problem that the endpoint access network device that receives the terminal handover information forwarded by the source network side device and the target sector to which the target sector to which the terminal actually switches is connected When the network access device is different (that is, the endpoint access network device is different from the access network device), the terminal cross-network handover problem from the source network to the target network improves the success rate of the terminal cross-network handover.

图 9b为本发明另一接入网设备第二实施例结构图。本实施例与图 9a所示实施例的区别在于，本实施例接入网设备还可包括第一会话信息获取模块 94。 FIG. 9b is a structural diagram of a second embodiment of another access network device according to the present invention. The difference between the embodiment and the embodiment shown in FIG. 9 is that the access network device in this embodiment may further include a first session information obtaining module 94.

第一会话信息获取模块 94 用于在本接入网设备未存储有终端的会话信息时，根据接收模块 91 接收的切换信息从源接入网设备获取终端的会话信息。 The first session information obtaining module 94 is configured to acquire the session information of the terminal from the source access network device according to the handover information received by the receiving module 91 when the access network device does not store the session information of the terminal.

本实施例在实现图 9a所示实施例技术效果的基础上，当本设备与端点接入网设备不是同一接入网设备、且本设备上没有存储终端的会话信息时，接入网设备可从源接入网设备获取终端会话信息，从而进一步解决了终端会话迁移的问题，有利于降低***复杂度，提供***性能。 This embodiment is based on the technical effect of the embodiment shown in FIG. 9a, when the device is connected to the endpoint. When the network access device is not the same access network device, and the session information of the terminal is not stored on the device, the access network device can obtain the terminal session information from the source access network device, thereby further solving the problem of terminal session migration, which is beneficial to reducing System complexity, providing system performance.

图 9c为本发明另一接入网设备第三实施例结构图。本实施例与图 9c所示实施例的区别在于，本实施例接入网设备还可包括第二会话信息获取模块 95。第二会话信息获取模块 95用于将接收模块 91接收的切换信息包括的终端标识发送给目标分组控制功能设备，触发目标分组控制功能设备，在目标分组控制功能设备未存储有在与终端标识相应的终端会话信息时，从源分组控制功能设备获取终端的会话信息。 FIG. 9c is a structural diagram of a third embodiment of another access network device according to the present invention. The difference between this embodiment and the embodiment shown in FIG. 9c is that the access network device of this embodiment may further include a second session information obtaining module 95. The second session information obtaining module 95 is configured to send the terminal identifier included in the handover information received by the receiving module 91 to the target packet control function device, and trigger the target packet control function device, where the target packet control function device is not stored and corresponding to the terminal identifier When the terminal session information is obtained, the session information of the terminal is acquired from the source packet control function device.

本实施例在实现图 9a所示实施例技术效果的基础上，当本设备与端点接入网设备不是同一接入网设备、触发目标分组控制功能设备，在目标分组控制功能设备未存储有在与终端标识相应的终端会话信息时，从源分组控制功能设备获取终端的会话信息；从而进一步解决了终端会话迁移的问题，有利于降低***复杂度，提供***性能。 In this embodiment, on the basis of implementing the technical effects of the embodiment shown in FIG. 9a, when the device and the endpoint access network device are not the same access network device, the trigger target group control function device is not stored in the target packet control function device. When the terminal session information corresponding to the terminal identifier is obtained, the session information of the terminal is obtained from the source packet control function device; thereby further solving the problem of terminal session migration, which is beneficial to reducing system complexity and providing system performance.

图 10为本发明跨网切换***第一实施例结构图。如图 10所示，本实施例包括终端 101、源网络侧设备 102、端点接入网设备 1 031和目标接入网设备 1032 ; 其中，端点接入网设备 1 031和目标接入网设备 1032可以位于目标网络侧 103。 FIG. 10 is a structural diagram of a first embodiment of an inter-network switching system according to the present invention. As shown in FIG. 10, the embodiment includes a terminal 101, a source network side device 102, an endpoint access network device 1 031, and a target access network device 1032. The endpoint access network device 1 031 and the target access network device 1032 It can be located at the target network side 103.

终端 101用于通过源网络侧设备 102向端点接入网设备 1031发送切换信息。具体的，终端 101向源网络侧设备 102发送切换信息；源网络侧设备 1 02 将来自终端 101的切换信息发送给端点接入网设备 1031。 The terminal 101 is configured to send the handover information to the endpoint access network device 1031 through the source network side device 102. Specifically, the terminal 101 sends the handover information to the source network side device 102. The source network side device 102 transmits the handover information from the terminal 101 to the endpoint access network device 1031.

端点接入网设备 1 031用于根据源网络侧设备 102转发的终端 101切换信息，获取目标接入网设备 1032的信息；若目标接入网设备 1032与端点接入网设备 1031不同，向目标接入网设备 1032发送切换信息。 The endpoint access network device 1 031 is configured to obtain information about the target access network device 1032 according to the terminal 101 handover information forwarded by the source network side device 102. If the target access network device 1032 is different from the endpoint access network device 1031, The access network device 1032 transmits the handover information.

目标接入网设备 1032用于根据切换信息为终端 101分配无线资源；将无线资源信息发送给源网络侧设备 102 , 触发源网络侧设备 102将无线资源信息发送给终端 101 ; 或者，将无线资源信息发送给端点接入网设备 1 031 , 触发端点接入网设备 1031通过源网络侧设备 102 , 将无线资源信息转发给终端 101。 The target access network device 1032 is configured to allocate a radio resource to the terminal 101 according to the handover information; send the radio resource information to the source network side device 102, and trigger the source network side device 102 to use the radio resource information. The information is sent to the terminal 101. Alternatively, the radio resource information is sent to the endpoint access network device 1 031, and the endpoint access network device 1031 is triggered to forward the radio resource information to the terminal 101 through the source network side device 102.

本实施例当接收源网络侧设备转发的终端切换信息的端点接入网设备、与终端实际要切换到目标扇区所属的目标接入网设备不同时，端点接入网设备将源网络侧设备转发的终端切换信息发送给目标接入网设备，由目标接入网设备为终端分配目标网络的无线资源并发送给终端，从而解决了当端点接入网设备与目标接入网设备不同时，终端从源网络到目标网络的跨网切换问题，提高了终端跨网切换的成功率。 In this embodiment, when the endpoint access network device that receives the terminal handover information forwarded by the source network side device is different from the target access network device to which the target actually belongs to the target sector, the endpoint access network device will be the source network side device. The forwarded terminal handover information is sent to the target access network device, and the target access network device allocates the radio resource of the target network to the terminal and sends the radio resource to the terminal, thereby solving the problem that when the endpoint access network device is different from the target access network device, The cross-network handover problem of the terminal from the source network to the target network improves the success rate of the terminal cross-network handover.

图 11为本发明跨网切换***第二实施例结构图。如图 11所示，本实施例与图 10所示实施例的区别在于，本实施例跨网切换***还包括位于目标网络侧 1 03的源接入网设备 1033。 FIG. 11 is a structural diagram of a second embodiment of an inter-network switching system according to the present invention. As shown in FIG. 11, the difference between this embodiment and the embodiment shown in FIG. 10 is that the inter-network switching system of this embodiment further includes a source access network device 1033 located at the target network side 103.

源接入网设备 1033用于存储终端 1 01的会话信息。 The source access network device 1033 is configured to store session information of the terminal 101.

相应的，目标接入网设备 1032还用于在自身（目标接入网设备 1032 ) 未存储有终端 101的会话信息时，根据终端 101的切换信息，从源接入网设备 1033获取终端 101的会话信息。 Correspondingly, the target access network device 1032 is further configured to acquire the terminal 101 from the source access network device 1033 according to the handover information of the terminal 101 when the session information of the terminal 101 is not stored by the target (the target access network device 1032). Session information.

本实施例在图 10所示实施例实现技术效果的基石出上，当端点接入网设备与目标接入网设备不是同一接入网设备、且目标接入网设备上没有存储终端的会话信息时，向存储有终端会话信息的源接入网设备获取终端的会话信息 , 从而解决终端会话迁移的问题，本实施例目标接入网设备获取会话的方法简单，有利于降低***复杂度，提供***性能。 This embodiment is based on the technical effect of the embodiment shown in FIG. 10, when the endpoint access network device and the target access network device are not the same access network device, and the target access network device does not have the storage terminal session information. The method for acquiring the session information of the terminal is obtained by the source access network device storing the terminal session information, so as to solve the problem of the terminal session migration. The method for obtaining the session by the target access network device in this embodiment is simple, and the system complexity is reduced. System performance.

图 12为本发明跨网切换***第三实施例结构图。如图 12所示，本实施例与图 10所示实施例的区别在于，本实施例跨网切换***还包括：目标分组控制功能设备 1034和源分组控制功能设备 1035 , 其中，目标分组控制功能设备 1034和源分组控制功能设备 1035均位于目标网络侧 103。 FIG. 12 is a structural diagram of a third embodiment of an inter-network switching system according to the present invention. As shown in FIG. 12, the difference between the embodiment and the embodiment shown in FIG. 10 is that the cross-network switching system of this embodiment further includes: a target grouping control function device 1034 and a source packet control function device 1035, wherein the target grouping control function is Both device 1034 and source packet control function device 1035 are located at target network side 103.

源分组控制功能设备 1035用于存储终端 1 01的会话信息。相应的，目标接入网设备 1032还用于将终端 101切换信息包括的终端标识发送给目标分组控制功能设备 1034。 The source packet control function device 1035 is configured to store session information of the terminal 101. Correspondingly, the target access network device 1032 is further configured to send the terminal identifier included in the terminal 101 handover information to the target packet control function device 1034.

目标分组控制功能设备 1034用于在自身（目标分组控制功能设备 1034 ) 未存储有与终端标识相应的终端 101的会话信息时，从源分组控制功能设备 1035获取终端 1 01的会话信息。 The target packet control function device 1034 is configured to acquire the session information of the terminal 101 from the source packet control function device 1035 when the session information of the terminal 101 corresponding to the terminal identifier is not stored by itself (the target packet control function device 1034).

本实施例在图 10所示实施例实现技术效果的基石出上，当端点接入网设备与目标接入网设备不是同一接入网设备、且目标分组控制功能设备上没有存储终端的会话信息时，向存储有终端会话信息的源分组控制功能设备获取终端的会话信息，从而解决终端会话迁移的问题，本实施例终端会话迁移的方法简单，有利于降低***复杂度，提供***性能。 This embodiment is based on the technical effect of the embodiment shown in FIG. 10, when the endpoint access network device and the target access network device are not the same access network device, and the target packet control function device does not have the storage terminal session information. In this case, the session information of the terminal is obtained from the source packet control function device that stores the terminal session information, so as to solve the problem of the terminal session migration. The method for the terminal session migration in this embodiment is simple, which is beneficial to reducing system complexity and providing system performance.

本领域普通技术人员可以理解：附图只是一个优选实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。 It will be understood by those of ordinary skill in the art that the drawings are only a schematic representation of a preferred embodiment, and that the modules or processes in the drawings are not necessarily required to practice the invention.

本领域普通技术人员可以理解：实施例中的装置中的模块可以按照实施例描述分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。 It will be understood by those skilled in the art that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。 The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括： R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明实施例技术方案的精神和范围。 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims

权利要求书 Claim

1、一种跨网切换方法，其特征在于，包括： An inter-network handover method, which is characterized in that:

将所述目标接入网设备根据所述切换信息为所述终端分配的无线资源信息，通过所述源网络侧设备转发给所述终端。 The radio resource information allocated by the target access network device to the terminal according to the handover information is forwarded to the terminal by the source network side device.

2、根据权利要求 1所述的跨网切换方法，其特征在于，所述将目标接入网设备根据所述切换信息为所述终端分配的无线资源信息，通过所述源网络侧设备转发给所述终端，包括： The cross-network handover method according to claim 1, wherein the radio resource information allocated by the target access network device to the terminal according to the handover information is forwarded by the source network side device to The terminal includes:

所述端点接入网设备接收来自所述目标接入网设备的无线资源信息；所述端点接入网设备将所述无线资源信息通过所述源网络侧设备转发给所述终端。 The endpoint access network device receives radio resource information from the target access network device; the endpoint access network device forwards the radio resource information to the terminal through the source network side device.

3、根据权利要求 1所述的跨网切换方法，其特征在于，在向所述目标接入网设备发送所述切换信息时，还包括： The cross-network switching method according to claim 1, wherein when the switching information is sent to the target access network device, the method further includes:

向所述目标接入网设备发送源网络侧设备的地址信息。 Sending address information of the source network side device to the target access network device.

4、根据权利要求 3所述的跨网切换方法，其特征在于，所述将所述目标接入网设备根据所述切换信息为所述终端分配的无线资源信息，通过所述源网络侧设备转发给所述终端，包括： The cross-network handover method according to claim 3, wherein the target access network device transmits the radio resource information allocated to the terminal according to the handover information, and the source network side device Forwarding to the terminal, including:

所述目标接入网设备将所述无线资源信息发送给与所述地址信息相应的源网络侧设备； Transmitting, by the target access network device, the radio resource information to a source network side device corresponding to the address information;

所述源网络侧设备将所述无线资源信息发送给所述终端。 The source network side device sends the radio resource information to the terminal.

5、根据权利要求 1-4任一所述的跨网切换方法，其特征在于，当所述目标接入网设备接收到所述切换信息后，还包括： The cross-network handover method according to any one of claims 1-4, wherein, after the target access network device receives the handover information, the method further includes:

若所述目标接入网设备未存储有所述终端的会话信息，则所述目标接入网设备从源接入网设备获取所述终端的会话信息。 If the target access network device does not store the session information of the terminal, the target access The network device acquires session information of the terminal from the source access network device.

6、根据权利要求 1-4任一所述的跨网切换方法，其特征在于，所述切换信息包括终端标识，当所述目标接入网设备接收到所述切换信息后，还包括：所述目标接入网设备将所述切换信息包括的终端标识发送给目标分组控制功能设备； The cross-network handover method according to any one of claims 1-4, wherein the handover information includes a terminal identifier, and after the target access network device receives the handover information, the method further includes: Transmitting, by the target access network device, the terminal identifier included in the handover information to the target packet control function device;

在所述目标分组控制功能设备未存储有与所述终端标识相应的终端会话信息时，从源分组控制功能设备获取所述终端的会话信息。 When the target packet control function device does not store the terminal session information corresponding to the terminal identifier, the session information of the terminal is acquired from the source packet control function device.

7、一种接入网设备，其特征在于，包括： 7. An access network device, comprising:

8、一种接入网设备，其特征在于，包括： 8. An access network device, comprising:

接收模块，用于接收端点接入网设备发送的源网络侧设备转发的终端切换信息； a receiving module, configured to receive terminal switching information forwarded by the source network side device sent by the endpoint access network device;

9、根据权利要求 8所述的接入网设备，其特征在于，还包括： The access network device according to claim 8, further comprising:

第一会话信息获取模块，用于在本接入网设备未存储有所述终端的会话信息时，根据所述切换信息从源接入网设备获取所述终端的会话信息。 a first session information obtaining module, configured to not store the session of the terminal in the access network device When the information is obtained, the session information of the terminal is obtained from the source access network device according to the handover information.

10、根据权利要求 8所述的接入网设备，其特征在于，还包括：第二会话信息获取模块，用于将所述切换信息包括的终端标识发送给目标分组控制功能设备，触发所述目标分组控制功能设备，在所述目标分组控制功能设备未存储有在与所述终端标识相应的终端会话信息时，从源分组控制功能设备获取所述终端的会话信息。 The access network device according to claim 8, further comprising: a second session information acquiring module, configured to send the terminal identifier included in the switching information to the target packet control function device, triggering the The target packet control function device acquires session information of the terminal from the source packet control function device when the target packet control function device does not store the terminal session information corresponding to the terminal identifier.

11、一种跨网切换***，包括终端和源网络侧设备，其特征在于，还包括：端点接入网设备和目标接入网设备，所述端点接入网设备和目标接入网设备均位于目标网络侧； An inter-network switching system, comprising a terminal and a source network side device, further comprising: an endpoint access network device and a target access network device, wherein the endpoint access network device and the target access network device are both Located on the target network side;

12、根据权利要求 11所述的跨网切换***，其特征在于，还包括：位于目标网络侧的源接入网设备，用于存储所述终端的会话信息；所述目标接入网设备还用于在自身未存储有所述终端的会话信息时，从所述源接入网设备获取所述终端的会话信息。 The cross-network switching system according to claim 11, further comprising: a source access network device located at a target network side, configured to store session information of the terminal; And configured to acquire session information of the terminal from the source access network device when the session information of the terminal is not stored by itself.

13、根据权利要求 11所述的跨网切换***，其特征在于，还包括：目标分组控制功能设备和源分组控制功能设备，所述目标分组控制功能设备和源分组控制功能设备均位于目标网络侧； The cross-network switching system according to claim 11, further comprising: a target packet control function device and a source packet control function device, wherein the target packet control function device and the source packet control function device are both located in a target network side;

所述源分组控制功能设备用于存储所述终端的会话信息；所述目标接入网设备还用于将所述切换信息包括的终端标识发送给目标分组控制功能设备； The source packet control function device is configured to store session information of the terminal; The target access network device is further configured to send the terminal identifier included in the handover information to the target packet control function device;

所述目标分组控制功能设备用于在自身未存储有与所述终端标识相应的终端会话信息时，从所述源分组控制功能设备获取所述终端的会话信息。 The target packet control function device is configured to acquire session information of the terminal from the source packet control function device when the terminal session information corresponding to the terminal identifier is not stored by itself.