WO2012167460A1

WO2012167460A1 - Method and apparatus for realizing mobility of local ip access or selected ip traffic offload

Info

Publication number: WO2012167460A1
Application number: PCT/CN2011/076450
Authority: WO
Inventors: 朱奋勤; 张艳平
Original assignee: 华为技术有限公司
Priority date: 2011-06-27
Filing date: 2011-06-27
Publication date: 2012-12-13
Also published as: CN103155683B; CN103155683A

Abstract

A method and an apparatus for realizing mobility of Local IP Access (LIPA) or Selected IP Traffic Offload (SIPTO) are provided. The method includes: the Tunnel Endpoint Identity (TEID) and first IP address assigned by the access network element for the User Equipment (UE) are received from the access network element, wherein, the first IP address is the IP address used by the access network element for interacting with the local gateway; the TEID and first IP address assigned by the access network element for the UE are transmitted to the local gateway via the serving gateway, wherein, the TEID and first IP address are received and forwarded to the local gateway by the serving gateway. In the method and apparatus for realizing the mobility of LIPA or SIPTO, the mobility function under the LIPA or SIPTO Public Data Network (PDN) connection can be realized without upgrading the serving gateway, therefore the deployment and maintenance cost of the operators are saved through avoiding the upgrade of the serving gateway.

Description

实现 LIPA或 SIPTO的移动性的方法和设备技术领域 Method and apparatus for realizing mobility of LIPA or SIPTO

本发明实施例涉及无线接入领域，并且更具体地，涉及实现 LIPA 或 SIPTO的移动性的方法和设备。背景技术 Embodiments of the present invention relate to the field of wireless access and, more particularly, to methods and apparatus for implementing mobility of LIPA or SIPTO. Background technique

Femtocell (微微蜂窝 )是一种低功耗无线接入点技术的泛称，使用授权许可的频谱，连接标准无线终端，利用家庭住户的 DSL( digital subscriber line: 数字用户线）、线缆宽带接入方式接入移动运营商的网络。图 1是 Femtocell 的通用模型的示意图， Femtocell与各种用户设备连接，并通过宽带路由器接入因特网。 Femtocell (Picocell) is a generic term for low-power wireless access point technology, using licensed spectrum, connecting to standard wireless terminals, using DSL (digital subscriber line) for home occupants, and broadband access to cable The mode is connected to the mobile operator's network. Figure 1 is a schematic diagram of the general model of Femtocell, which is connected to various user equipments and connected to the Internet through a broadband router.

图 2是家庭接入***架构的示意图。如图 2所示，家庭基站（HNB ： Home NodeB )是运行在 UTRAN ( UMTS Territorial Radio Access Network: UMTS 陆地无线接入网）频谱的家庭无线接入点；家庭演进基站（HeNB: Home evolved NodeB )是运行在 E-UTRAN ( Evolved UMTS Territorial Radio Access Network: 演进的 UMTS陆地无线接入网 )频谱的家庭无线接入点；家庭非 3GPP无线接入点（Home non-3GPP WAP ： Home non-3GPP Wireless Access Point )是为运行在非 3GPP网络（如 CDMA/Wimax/WLAN/HRPD等网络）频谱的家庭无线接入点。 2 is a schematic diagram of a home access system architecture. As shown in FIG. 2, a home base station (HNB: Home NodeB) is a home wireless access point operating in a UTRAN (UMTS Territorial Radio Access Network) spectrum; a home evolved base station (HeNB: Home evolved NodeB) Is a home wireless access point operating in the E-UTRAN (Evolved UMTS Territorial Radio Access Network) spectrum; Home non-3GPP WAP: Home non-3GPP Wireless Access Point is a home wireless access point for spectrum running on non-3GPP networks such as CDMA/Wimax/WLAN/HRPD.

如图 2所示，家庭基站网关（ HNB GW )、家庭演进基站网关（ HeNB GW ) 和家庭非 3GPP无线接入点网关（ Home non-3GPP WAP GW )分别是通过通用的 IP接入网络与 HNB、接入网元和家庭非 3GPP无线接入点相连的家庭无线接入点的网关网元。 As shown in FIG. 2, the home base station gateway (HNB GW), the home evolved base station gateway (HeNB GW), and the home non-3GPP wireless access point gateway (Home non-3GPP WAP GW) respectively pass the universal IP access network and the HNB. And a gateway network element of the home wireless access point connected to the access network element and the home non-3GPP wireless access point.

其中，移动网络中的网元包括： E-UTRAN中的移动性管理实体（ MME: The network element in the mobile network includes: a mobility management entity in the E-UTRAN (MME:

Mobility Management Entity ) , GPRS/UMTS 中的服务 GPRS 支持节点 ( SGSN ： Serving GPRS Supporting Node )和非 3GPP网络中包括的多种实现实体的非 3GPP网关（non-3GPP GW ), 例如， WLAN中的演进分组数据网关（ EPDG ： Evolved Packet Data Gateway )、 Wimax中的接入业务网络网关（ASN GW ： Access Service Network Gateway ), CDMA中的接入网关 ( AGW ： Access Gateway )及 HRPD中的高速分组数据服务网关（ HSGW: HRPD Serving Gateway )等。 Mobility Management Entity), a Serving GPRS Supporting Node (SGSN) in GPRS/UMTS and a non-3GPP GW (non-3GPP GW) of various implementing entities included in a non-3GPP network, for example, evolution in WLAN Packet Data Gateway (EPDG: Evolved Packet Data Gateway), Access Service Network Gateway (ASN GW: Access Service Network Gateway) in Wimax, Access Gateway (AGW: Access Gateway) in CDMA, and High Speed Packet Data Service in HRPD Gateway (HSGW: HRPD Serving Gateway) and so on.

归属用户服务器（ HSS ： Home Subscriber Server )用于存储 UE ( User Equipment:用户设备）的签约信息。认证、授权与计费服务器（ AAA Server ： Authentication Authorization and Accounting Server )用于对 UE执行接入认证、授权和计费功能。 The Home Subscriber Server (HSS) is used to store subscription information of the UE (User Equipment). The Authentication Authorization and Accounting Server (AAA Server) is used to perform access authentication, authorization, and accounting functions for the UE.

上述图 2所示的仅是家庭接入***架构的一个示例，在其它的家庭接入 ***架构中，家庭接入点可以和移动网络中的网元直接相连。 The above FIG. 2 is only an example of a home access system architecture. In other home access system architectures, a home access point can be directly connected to a network element in a mobile network.

当在现有的家庭接入***架构中，用户通过家庭基站或家庭演进基站 (以下筒称为 "H(e)NB" , 或者也称为接入网元）接入运营商网络时，出于节约数据传输成本的目的，对于用户访问因特网的数据，可以在接入网元或者在接入网元附近直接发送到因特网。同时，为吸引客户，运营商提供了附加服务，即用户可以通过接入网元访问同样处于家庭或者企业网络中的其它 IP设备，比如打印机，传真机等。 In an existing home access system architecture, when a user accesses a carrier network through a home base station or a home evolved base station (hereinafter referred to as "H(e)NB", or also referred to as an access network element), For the purpose of saving data transmission cost, the data for the user to access the Internet can be directly sent to the Internet in the vicinity of the access network element or in the vicinity of the access network element. At the same time, in order to attract customers, operators provide additional services, that is, users can access other IP devices, such as printers and fax machines, which are also in the home or enterprise network through access network elements.

LIPA ( Local IP Access: 本地 IP接入 )是指：当用户从接入网元接入时， UE可以通过位于接入网元的本地网关（ L-GW: Local Gateway )或者通过和接入网元同样位于家庭或者企业网络的本地网关来访问家庭或者企业网络中的其他 IP设备。 LIPA (Local IP Access) refers to: When a user accesses from an access NE, the UE can pass through the local gateway (L-GW: Local Gateway) located in the access NE or through the access network. The meta is also located in the home gateway of the home or corporate network to access other IP devices in the home or corporate network.

SIPTO ( Selected IP traffic offload: 选择 IP数据流疏导）是指：当用户从接入网元接入时， UE可以通过位于接入网元的本地网关或者通过和接入网元同样位于家庭或者企业网络的本地网关访问特定的 IP 网络，比如因特网。 SIPTO (Selected IP traffic offload): When the user accesses the access network element, the UE can be located in the home or enterprise through the local gateway located in the access network element or through the access network element. The local gateway of the network accesses a specific IP network, such as the Internet.

也就是说，当用户设备建立 LIPA或 SIPTO PDN ( Packet Data Network: 分组数据网络）时，用户设备从接入网元接入，并通过本地网关来访问 IP 网络及 IP设备，图 3是一般的 LIPA或 SIPTO PDN连接的示意图。 That is, when the user equipment establishes LIPA or SIPTO PDN (Packet Data Network), the user equipment accesses from the access network element and accesses the IP network and the IP device through the local gateway. FIG. 3 is a general Schematic diagram of a LIPA or SIPTO PDN connection.

随着移动设备使用的普及，在上述家庭接入***架构中，用户设备也可能发生移动，如果在用户移动后保证 LIPA或 SIPTO的连续性，即实现 LIPA 或 SIPTO的移动性，是一个需要解决的问题。发明内容 With the popularity of mobile devices, in the above-mentioned home access system architecture, user equipment may also move. If the continuity of LIPA or SIPTO is ensured after the user moves, that is, the mobility of LIPA or SIPTO is realized, which is a need to be solved. The problem. Summary of the invention

基于上述目的做出本发明，且本发明的目的是提供一种实现 LIPA SIPTO的移动性的方法和设备。一方面，提供了用于实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO 的移动性的方法，包括：从接入网元接收所述接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中所述第一 IP地址是接入网元用于与本地网关交互使用的 IP地址；经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址，其中，所述 TEID和第一 IP 地址为服务网关收到后，服务网关转发到所述本地网关。 The present invention has been made in view of the above objects, and an object of the present invention is to provide a method and apparatus for realizing mobility of LIPA SIPTO. In one aspect, a method for implementing local IP access LIPA or selecting an IP data stream to steer SIPTO mobility includes: receiving, from an access network element, a tunnel endpoint identifier TEID assigned by the access network element to a user equipment a first IP address, where the first IP address is an IP address used by the access network element to interact with the local gateway; and the serving gateway sends the TEID assigned by the access network element to the user equipment to the local gateway. The first IP address, where the TEID and the first IP address are received by the serving gateway, and the serving gateway forwards to the local gateway.

另一方面，提供了用于实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO的移动性的设备，包括：接收装置，用于从接入网元接收所述接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中所述第一 IP 地址是接入网元用于与本地网关交互使用的 IP地址；发送装置，用于经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址，其中，所述 TEID和第一 IP地址为服务网关收到后，服务网关转发到所述本地网关。 On the other hand, an apparatus for implementing local IP access LIPA or selecting an IP data stream to steer SIPTO mobility includes: receiving means, configured to receive, by an access network element, the access network element for user equipment allocation The tunnel endpoint identifies the TEID and the first IP address, where the first IP address is an IP address used by the access network element to interact with the local gateway; and the sending device is configured to send the access to the local gateway through the serving gateway. The TEID and the first IP address allocated by the network element to the user equipment, where the TEID and the first IP address are received by the serving gateway, and the serving gateway forwards to the local gateway.

在上述用于实现 LIPA或 SIPTO的移动性的方法和设备中，通过向本地网关通知不需要服务网关处理而仅需要转发的、接入网元为用户设备分配的 TEID和 IP地址，可以在不升级服务网关的情况下实现 LIPA或 SIPTO PDN 连接下的移动性功能，因此，通过避免服务网关的升级，节约了运营商的部署和维护成本。附图说明 In the foregoing method and device for implementing mobility of LIPA or SIPTO, by notifying the local gateway of the TEID and IP address allocated by the access network element for the user equipment, which only needs to be forwarded, which does not need to be processed by the serving gateway, The mobility function under LIPA or SIPTO PDN connection is implemented when the service gateway is upgraded. Therefore, the deployment and maintenance cost of the operator is saved by avoiding the upgrade of the service gateway. DRAWINGS

为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作筒单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

图 1是 Femtocell的通用模型的示意图； Figure 1 is a schematic diagram of a general model of Femtocell;

图 2是家庭接入***架构的示意图； 2 is a schematic diagram of a home access system architecture;

图 3是一般的 LIPA或 SIPTO PDN连接的示意图； Figure 3 is a schematic diagram of a general LIPA or SIPTO PDN connection;

图 4是示出接入网元和本地网关合一的架构的示意图； 4 is a schematic diagram showing an architecture in which an access network element and a local gateway are integrated;

图 5是示出接入网元和本地网关分离的架构的示意图；图 6是示出了根据本发明实施例的实现 LIPA或 SIPTO的移动性的方法的流程图； 5 is a schematic diagram showing an architecture in which an access network element and a local gateway are separated; 6 is a flow chart showing a method of implementing mobility of LIPA or SIPTO, in accordance with an embodiment of the present invention;

图 7是示出了在建立 LIPA或 SIPTO PDN连接时在接入网元和本地网关之间建立隧道连接的流程的示意图； 7 is a schematic diagram showing a flow of establishing a tunnel connection between an access network element and a local gateway when establishing a LIPA or SIPTO PDN connection;

图 8是示出在 Sl/Iu连接释放时，本地网关和接入网元之间的连接释放的流程的示意图； Figure 8 is a diagram showing the flow of connection release between the local gateway and the access network element when the Sl/Iu connection is released;

图 9是示出在 S 1/Iu连接释放之后，用户设备做出服务请求时的流程的示意图； Figure 9 is a diagram showing the flow when the user equipment makes a service request after the S 1/Iu connection is released;

图 10是示出当接入网元改变时，如何建立新的接入网元与本地网关之间的隧道连接的流程的示意图； FIG. 10 is a schematic diagram showing how to establish a tunnel connection between a new access network element and a local gateway when the access network element changes;

图 11是示出当接入网元改变时的 x2或者 RNC增强切换流程的示意图；图 12是示出了根据本发明实施例的实现 LIPA或 SIPTO的移动性的设备的框图。具体实施方式 Figure 11 is a diagram showing an x2 or RNC enhanced handover procedure when an access network element changes; Figure 12 is a block diagram showing a device implementing mobility of LIPA or SIPTO according to an embodiment of the present invention. detailed description

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

如上所述，在当前的 3GPP标准架构中，接入网元和本地网关通常是合一的，即，接入网元和本地网关在物理上是一体的。下面，将结合图 4描述在接入网元和本地网关合一的架构中的信令面和用户面的信令和数据传递，图 4是示出接入网元和本地网关合一的架构的示意图。如图 4所示，虚线示出了在现有的接入网元和本地网关合一的架构中的信令传递。当 UE需要发送信令到局域网时，其首先将信令发送到接入网元（图 4中的 HNB ) , 此后，接入网元将信令经由移动性管理网元（图 4中的 SGSN )和服务网关（图 4 中的 Serving GW )转发到本地网关（图 4中的 LGW ), 再由本地网关与其它网络和设备进行信令交互。而当发送用户面的数据时，由于接入网元和本地网关是合一的，在建立 LIPA或 SIPTO PDN时，移动性管理网元将本地网关为用户分配的用户名 TEID ( Tunnel Endpoint Identity: 隧道端点标识）发送到接入网元，由接入网元利用内部接口根据该 TEID执行承载绑定，建立和本地网关之间的内部数据转发隧道。此时，当从 UE发送上行数据时，接入网元接收 UE发送的上行数据并通过内部数据转发隧道发送到本地网关，再由本地网关将数据包发送到局域网中的目的地址。同样，当本地网关接收到下行数据时，本地网关通过内部数据转发隧道将数据包发送到接入网元，再由接入网元发送给 UE。这里，数据包由接入网元直接发送到本地网关节约了核心网的传输成本，提高了传输效率。由于信令数据包较少，仍然按照 3GPP现有标准流程传递，可以避免对网络网元做大的改动。 As described above, in the current 3GPP standard architecture, the access network element and the local gateway are generally unified, that is, the access network element and the local gateway are physically integrated. In the following, the signaling plane and user plane signaling and data transfer in the architecture of the access network element and the local gateway are described in conjunction with FIG. 4, and FIG. 4 is a diagram showing the architecture of the access network element and the local gateway. Schematic diagram. As shown in Figure 4, the dashed lines show the signaling transfer in the architecture of the existing access network element and local gateway. When the UE needs to send signaling to the local area network, it first sends the signaling to the access network element (HNB in FIG. 4). Thereafter, the access network element transmits the signaling via the mobility management network element (SGSN in FIG. 4). And the service gateway (Serving GW in Figure 4) forwards to the local gateway (LGW in Figure 4), which then communicates with other networks and devices. When the user plane data is sent, the access network element and the local gateway are unified. When the LIPA or SIPTO PDN is established, the mobility management network element assigns the user name TEID (the tunnel endpoint identity: Tunnel endpoint identifier) It is sent to the access network element, and the access network element performs bearer binding according to the TEID by using the internal interface, and establishes an internal data forwarding tunnel between the local gateway and the local gateway. At this time, when the uplink data is sent from the UE, the access network element receives the uplink data sent by the UE and sends the data to the local gateway through the internal data forwarding tunnel, and then the local gateway sends the data packet to the destination address in the local area network. Similarly, when the local gateway receives the downlink data, the local gateway sends the data packet to the access network element through the internal data forwarding tunnel, and then sends the data packet to the UE. Here, the data packet is directly sent by the access network element to the local gateway, which saves the transmission cost of the core network and improves the transmission efficiency. Since there are fewer signaling data packets, they are still delivered according to the existing 3GPP standard procedures, which can avoid major changes to the network element.

在 3GPP R11中，为了保证用户移动后， LIPA和 SIPTO的连续性，即为了实现 LIPA和 SIPTO的移动性，引入了接入网元和本地网关分离的架构。图 5是示出接入网元和本地网关分离的架构的示意图。如图 5所示，当 UE 需要发送信令时，首先将信令发送到接入网元（图 5中的 HNB或 HeNB ), 之后，接入网元经由移动性管理网元（图 5中的 S4-SGSN/MME )和服务网关（图 5中的 S-GW )将信令发送到本地网关（图 5中的 L-PGW )。但是，由于在这种接入网元和本地网关分离的架构中，接入网元与本地网关分离，无法利用内部接口进行承载绑定，因此，无法在接入网元与本地网关之间传递数据。也就是说，需要一种在 LIPA或 SIPTO PDN连接时，通过在接入网元和本地网关之间建立隧道连接，来在接入网元和本地网关之间实现直接的数据传递，从而实现 LIPA或 SIPTO的移动性的方法。 In 3GPP R11, in order to ensure the continuity of LIPA and SIPTO after the user moves, that is, to realize the mobility of LIPA and SIPTO, an architecture in which the access network element and the local gateway are separated is introduced. Figure 5 is a schematic diagram showing an architecture in which an access network element and a local gateway are separated. As shown in FIG. 5, when the UE needs to send signaling, the signaling is first sent to the access network element (HNB or HeNB in FIG. 5), and then the access network element is sent through the mobility management network element (FIG. 5). The S4-SGSN/MME) and the Serving Gateway (S-GW in Figure 5) send signaling to the local gateway (L-PGW in Figure 5). However, in the architecture in which the access network element and the local gateway are separated, the access network element is separated from the local gateway, and the internal interface cannot be used for bearer binding. Therefore, the access network element cannot be transmitted between the access network element and the local gateway. data. That is to say, there is a need for a direct data transfer between the access network element and the local gateway by establishing a tunnel connection between the access network element and the local gateway when the LIPA or SIPTO PDN is connected, thereby implementing LIPA. Or SIPTO's mobility method.

因此，本发明的实施例提供了用于实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO的移动性的方法和设备。图 6是示出了根据本发明实施例的实现 LIPA或 SIPTO的移动性的方法的流程图，其由移动性管理网元实施。 S 1 , 从接入网元接收接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中第一 IP地址是接入网元用于与本地网关交互使用的 IP地址； S2 , 经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址，其中，所述 TEID和第一 IP地址为服务网关收到后，服务网关转发到所述本地网关。 Accordingly, embodiments of the present invention provide methods and apparatus for implementing local IP access to LIPA or selecting IP data streams to groom the mobility of SIPTO. 6 is a flow chart showing a method of implementing mobility of LIPA or SIPTO, implemented by a mobility management network element, in accordance with an embodiment of the present invention. S1, receiving, by the access network element, a tunnel endpoint identifier TEID and a first IP address that are allocated by the access network element to the user equipment, where the first IP address is an IP address used by the access network element to interact with the local gateway; Sending, by the serving gateway, the TEID and the first IP address allocated by the access network element to the user equipment, where the TEID and the first IP address are received by the serving gateway, and the serving gateway forwards to the local The local gateway.

通过向本地网关通知不需要服务网关的处理而仅需要转发的接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，可以在实现接入网元和本地网关的隧道连接，从而实现 LIPA或 SIPTO的连续性，并且，由于不需要升级服务网关，节约了运行商的成本。本发明实施例的用于实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO 的移动性的方法可以应用于在初始建立 LIPA或 SIPTO PDN连接时，在接入网元和本地网关之间的隧道连接的建立，下面将结合图 7对此进行具体描述。 By notifying the local gateway that the access network element that needs to be forwarded only needs to forward the tunnel endpoint identifier TEID and the first IP address allocated by the user equipment, the tunnel connection between the access network element and the local gateway may be implemented. Realize the continuity of LIPA or SIPTO, and save the cost of the operator because there is no need to upgrade the service gateway. The method for implementing local IP access LIPA or selecting IP data flow to groom SIPTO mobility according to an embodiment of the present invention may be applied to a tunnel between an access network element and a local gateway when initially establishing a LIPA or SIPTO PDN connection. The establishment of the connection will be specifically described below in conjunction with FIG.

在下文的描述中，接入网元是指 UTRAN中 HNB或者 E-UTRAN*** 中的 HeNB , 并且移动性管理网元是指 UTRAN ***中的 SGSN 或者 E-UTRAN***中的 MME。当然，本领域技术人员可以理解，在其它***中，接入网元和移动性管理网元也可以指其它相应的设备，本发明的实施例并不意在对此进行任何限制。 In the following description, the access network element refers to the HNB in the UTRAN or the HeNB in the E-UTRAN system, and the mobility management network element refers to the SGSN in the UTRAN system or the MME in the E-UTRAN system. Of course, those skilled in the art can understand that in other systems, the access network element and the mobility management network element can also refer to other corresponding devices, and embodiments of the present invention are not intended to limit the present.

图 7是示出了在建立 LIPA或 SIPTO PDN连接时在接入网元和本地网关之间建立隧道连接的流程的示意图。 Figure 7 is a diagram showing the flow of establishing a tunnel connection between an access network element and a local gateway when establishing a LIPA or SIPTO PDN connection.

如图 7所示， S11 , 当要建立 LIPA或 SIPTO PDN连接时，用户设备向移动性管理网元发送 PDN连接建立请求（ PDN Connectivity Request )消息。 S12, 移动性管理网元根据建立 LIPA或 SIPTO PDN连接的相关信息，所述相关信息具体为：连接的签约和 /或接入网元信息例如，用户设备请求的 APN ( Access Point Name：接入点名称 )是否允许 1IPA或者 SIPTO、接入网元支持 LIPA或 SIPTO的能力、用户设备签约数据或者运营商配置来判断是否可以激活 LIPA或 SIPTO PDN。比如，如果用户设备签约中所述请求的 APN 允许 LIPA或允许 SIPTO,且接入网元支持 LIPA或 SIPTO,则移动性管理网元可以为用户建立 LIPA或 SIPTO PDN连接，并将该 PDN连接标记为 LIPA 或 SIPTO PDN连接。这里，标记只是实现移动性管理网元后续流程中判断 PDN是否为 LIPA或 SIPTO PDN的一种实现方式，本发明的实施例并不意在对判断的方法进行任何限制。接入网元支持 LIPA或 SIPTO的能力由接入网元在用户设备接入核心网的时候或者用户设备启动时通过 Iu或者 S 1接口上报到移动性管理网元，且移动性管理网元保存所述能力。 S12, 移动性管理网元向服务网关发送创建会话请求（ Create session request ) 消息，服务网关分配用户面和控制面信息，在本发明的实施例中，用户面信息包括但不限于用户面 IP地址/ TEID, 且控制面信息包括但不限于控制面 IP地址/ TEID。 S12, 服务网关向本地网关转发该创建会话请求消息，收到消息后，本地网关为所述 PDN连接分配用户面信息和控制面信息。 As shown in FIG. 7, S11, when a LIPA or SIPTO PDN connection is to be established, the user equipment sends a PDN Connectivity Request (PDN Connectivity Request) message to the mobility management network element. S12, the mobility management network element is configured according to the information about establishing a LIPA or a SIPTO PDN connection, where the related information is specifically: a connection subscription and/or access network element information, for example, an APN requested by the user equipment (Access Point Name: access) Point Name) Whether to allow 1IPA or SIPTO, access network element to support LIPA or SIPTO, user equipment subscription data or carrier configuration to determine whether LIPA or SIPTO PDN can be activated. For example, if the requested APN in the user equipment subscription allows LIPA or SIPTO is allowed, and the access NE supports LIPA or SIPTO, the mobility management network element may establish a LIPA or SIPTO PDN connection for the user, and mark the PDN connection. Connect for LIPA or SIPTO PDN. Here, the marking is only an implementation manner for determining whether the PDN is a LIPA or a SIPTO PDN in the subsequent process of the mobility management network element, and the embodiment of the present invention is not intended to impose any limitation on the method of determining. The capability of the access network element to support the LIPA or the SIPTO is reported by the access network element to the mobility management network element through the Iu or S1 interface when the user equipment accesses the core network or when the user equipment is started, and the mobility management network element is saved. The ability. S12, the mobility management network element sends a Create Session Request message to the service gateway, where the service gateway allocates user plane and control plane information. In the embodiment of the present invention, the user plane information includes but is not limited to the user plane IP address. / TEID, and the control plane information includes but is not limited to the control plane IP address / TEID. S12. The serving gateway forwards the create session request message to the local gateway. After receiving the message, the local gateway allocates user plane information and control plane information to the PDN connection.

S13, 本地网关向服务网关发送创建会话响应（ Create session Response ) 消息，该创建会话响应消息中包括本地网关为用户分配的用户面和控制面信息，服务网关向移动性管理网元发送创建会话响应消息，该创建会话响应消息中包括本地网关以及服务网关为用户分配的用户面和控制面信息。 S13. The local gateway sends a Create Session Response message to the serving gateway, where the Create Session Response message includes a user plane and a control plane letter allocated by the local gateway to the user. The service gateway sends a create session response message to the mobility management network element, where the create session response message includes the local gateway and the user plane and control plane information allocated by the service gateway for the user.

514,移动性管理网元向接入网元发送 ERAB/RAB( Evolved Radio Access Bearer/Radio Access Bearer: 演进的无线接入载 /无线接入载 )指派请求 ( (E-RAB)RAB Assignment request ) 消息以建立无线侧⁷ 载，如果 S 12 , 移动性管理网元确定为用户建立 LIPA或 SIPTO PDN, 该消息中包括本地网关为用户分配的 TEID和 IP地址，并且该 IP地址为本地网关用于与接入网元交互使用的 IP地址，通常称为 LGW@LN。在本发明的实施例中，移动性管理网元获取该 LGW@LN可以有如下三种方式： 514. The mobility management network element sends an ERAB/RAB (Evolved Radio Access Bearer/Radio Access Bearer) assignment request ((E-RAB) RAB Assignment request) to the access network element. ⁷ message carrier to establish a radio side, if S 12, the mobility management network element determines to establish the user LIPA or SIPTO PDN, the message comprises a local gateway and TEID allocated to the user's IP address, and the IP address for the local gateway The IP address used to interact with the access NE, usually called LGW@LN. In the embodiment of the present invention, the mobility management network element may obtain the LGW@LN in the following three manners:

方法一：如在 S13中，本地网络在发送的创建会话响应消息中携带的用户面或者控制面 IP地址包括所述 L-GW@LN, 以经由服务网关发送到移动性管理网元； Method 1: In S13, the user plane or control plane IP address carried in the created session response message sent by the local network includes the L-GW@LN, and is sent to the mobility management network element via the serving gateway;

方法二：该 L-GW@LN可以通过 OAM ( Operate and Maintain: 操作和维护***）方式预先发送到接入网元，再由接入网元将该 L-GW@LN通过 Iu接口或者 S1接口消息发送到移动性管理网元； Method 2: The L-GW@LN can be pre-sent to the access NE through the OAM (Operation and Maintenance System), and the L-GW@LN can pass the Iu interface or the S1 interface by the access NE. The message is sent to the mobility management network element;

方法三：移动性管理网元根据用户接入的小区等通过 DNS ( Domain Name Server: 域名服务器）查询以获得 L-GW@LN。 Method 3: The mobility management network element queries the domain name server (DNS) to obtain L-GW@LN according to the cell accessed by the user.

515, 接入网元保存本地网关为用户分配的 TEID和 L-GW@LN, 并向移动性管理网元发送 ERAB/RAB 指派响应（（E-RAB)RAB Assignment response )消息，该消息中包括接入网元为用户分配的 TEID以及用于与本地网关交互使用的 IP地址，通常称为 H(e)NB@LN。 515. The access NE saves the TEID and L-GW@LN allocated by the local gateway to the user, and sends an ERAB/RAB Assignment Response (E-RAB) RAB Assignment response message to the mobility management network element, where the message includes The TEID assigned by the access NE to the user and the IP address used for interaction with the local gateway, commonly referred to as H(e)NB@LN.

516, 移动性管理网元在接收到该 ERAB/RAB指派响应消息后，由于建立的是 LIPA或 SIPTO PDN连接，移动性管理网元将接入网元分配的用户面信息，即， TEID+IP地址包括在改变通知请求（change notification request) 消息中发送到服务网关， TEID+IP地址封装在消息中的特别信元中，该信元服务网元并不解析，收到后直接转发到本地网关，比如 Private Extension (私有扩展）信元。收到该改变通知请求消息后，服务网关将其转发到本地网关。 516: After receiving the ERAB/RAB assignment response message, the mobility management network element accesses the user plane information allocated by the network element, that is, TEID+IP, because the LIPA or SIPTO PDN connection is established. The address is sent to the serving gateway in the change notification request message. The TEID+IP address is encapsulated in a special cell in the message. The cell service network element is not parsed, and is directly forwarded to the local gateway after receiving. , such as the Private Extension (Private Extension) cell. After receiving the change notification request message, the serving gateway forwards it to the local gateway.

517, 本地网关保存接入网元分配的用户面信息，即， TEID和 IP地址，并向服务网关发送改变通知响应（ Change Notification Response )消息，服务网关将所述改变通知响应消息转发到移动性管理网元。 517. The local gateway saves the user plane information allocated by the access network element, that is, the TEID and the IP address, and sends a change notification response (Change Notification Response) message to the serving gateway, and the service gateway forwards the change notification response message to the mobility. Manage network elements.

最后， S18,完成 PDN连接建立的其它流程，从而完成在 LIPA或 SIPTO PDN 连接的建立。这里，本领域技术人员可以理解除了上述流程外，完成 LIPA或 SIPTO PDN连接还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。这样，在建立了 LIPA或 SIPTO PDN连接之后，由于接入网元知道本地网关为用户分配的 TEID和 IP地址，并且本地网关也知道接入网元分配的 TEIP和 IP地址，当有下行数据发送到本地网关时，本地网关可以根据接入网元分配的 TEID和 IP地址，将数据包发送到接入网元，而当有上行数据从 UE发送到接入网元时，接入网元也可以根据本地网关分配的 TEID和 IP地址，将数据包发送到本地网关，再由本地网关发送到目的地地址。 Finally, S18, complete the other process of establishing the PDN connection, thereby completing the LIPA or SIPTO The establishment of a PDN connection. Here, those skilled in the art can understand which processes are required to complete the LIPA or SIPTO PDN connection in addition to the above processes. In order to highlight the key points of the embodiments of the present invention, no further details are provided herein. In this way, after the LIPA or SIPTO PDN connection is established, the access network element knows the TEID and IP address assigned by the local gateway to the user, and the local gateway also knows the TEIP and IP address allocated by the access network element, when there is downlink data transmission. When the local gateway is connected to the local gateway, the local gateway can send the data packet to the access network element according to the TEID and the IP address allocated by the access network element, and when the uplink data is sent from the UE to the access network element, the access network element also The data packet can be sent to the local gateway according to the TEID and IP address assigned by the local gateway, and then sent to the destination address by the local gateway.

在 S16, 移动性管理网元通过改变通知请求消息发送接入网元分配的用户面信息，是因为在现有消息定义中，该改变通知请求消息中的某些信元，比如 Private Extension可以不需要服务网关做处理，服务网关在收到该消息后可以直接转发到分组网关。因此，利用该改变通知请求消息包括接入网元分配的用户面信息，不需要服务网关做特殊处理，只需要和以前一样转发就可以了，这避免了服务网关升级。并且，对于从本地网关发送的改变通知响应消息也是如此。这里，本领域技术人员可以理解，在本申请的实施例中，并不限定利用改变通知请求消息传递接入网元分配的用户面信息或者 Priviate Extension信元，也可以采用其它不需要服务网关做处理而仅需要转发的消息来包括所述接入网元分配的用户面信息，从而发送到本地网关。 At S16, the mobility management network element sends the user plane information allocated by the access network element by changing the notification request message, because in the existing message definition, the change notification notification message includes certain cells, such as Private Extension may not The service gateway needs to be processed, and the service gateway can directly forward to the packet gateway after receiving the message. Therefore, the change notification request message includes the user plane information allocated by the access network element, and does not require the service gateway to perform special processing, and only needs to be forwarded as before, which avoids the service gateway upgrade. Also, the same is true for the change notification response message sent from the local gateway. Here, those skilled in the art can understand that, in the embodiment of the present application, the user plane information or thePririvate Extension cell allocated by the access network element is not limited by using the change notification request message, and other service gateways may also be used. The message that needs to be forwarded only needs to include the user plane information allocated by the access network element, and is sent to the local gateway.

这样，在上述建立接入网元和本地网关的隧道连接的流程中，仅需要升级接入网元和移动性管理网元以及本地网关即可实现 LIPA或 SIPTO的移动性，避免升级服务网关，这减小了运营商的升级成本以及运维成本。同时，该方法也避免为建立接入网元和本地网关之间的用户面隧道，在接入网元和本地网关之间建立控制面隧道而进行隧道管理，筒化了接入网元的实现，从而节约接入网元的部署成本。 In this way, in the above process of establishing a tunnel connection between the access network element and the local gateway, only the access network element and the mobility management network element and the local gateway need to be upgraded to implement LIPA or SIPTO mobility, thereby avoiding upgrading the service gateway. This reduces the operator's upgrade cost and operation and maintenance costs. At the same time, the method also avoids establishing a user plane tunnel between the access network element and the local gateway, establishing a control plane tunnel between the access network element and the local gateway, and performing tunnel management, and implementing the access network element. Therefore, the deployment cost of the access network element is saved.

在上述图 7的示例中，在 S12根据建立 LIPA或 SIPTO PDN连接的相关信息判断是否可以激活 LIPA或 SIPTO PDN连接，并保存 LIPA或 SIPTO PDN 连接的标识。但是，本领域技术人员可以理解，在经由例如改变通知请求向本地网关通知接入网元为用户分配的 TEID和 IP地址时，可以居建立 LIPA 或 SIPTO PDN连接的相关信息判断所述家庭接入***架构是否是 LIPA或 SIPTO PDN连接，并在确定是 LIPA或 SIPTO PDN连接的情况下，则经由不需要服务网关处理而只需要转发的消息发送接入网元为用户分配的 TEID 和 IP地址，从而实现 LIPA或 SIPTO的连接性。 In the example of FIG. 7 above, it is determined at S12 whether the LIPA or SIPTO PDN connection can be activated based on the information related to establishing the LIPA or SIPTO PDN connection, and the identity of the LIPA or SIPTO PDN connection is saved. However, those skilled in the art can understand that when the TEID and the IP address assigned by the access network element to the user are notified to the local gateway via, for example, a change notification request, the related information of the LIPA or SIPTO PDN connection may be established to determine the home access. Whether the system architecture is a LIPA or SIPTO PDN connection, and if it is determined to be a LIPA or SIPTO PDN connection, then The message that does not need to be processed by the serving gateway but only needs to be forwarded sends the TEID and IP address allocated by the access network element to the user, thereby realizing the connectivity of LIPA or SIPTO.

在上述图 7的示意图中，示出了在建立 LIPA或 SIPTO PDN时如何建立接入网元和本地网关之间的隧道连接。此外，在已经建立了 LIPA或 SIPTO PDN 连接之后，根据通信环境的改变，会发生其它一些情况，例如， Sl/Iu 连接的释放，服务请求，以及由于用户设备的移动引起的接入网元的切换等。下面，将结合图 8到图 11对于这些情况中的一些示例进行解释。 In the above diagram of Fig. 7, it is shown how to establish a tunnel connection between an access network element and a local gateway when establishing a LIPA or SIPTO PDN. In addition, after the LIPA or SIPTO PDN connection has been established, other conditions may occur depending on the change of the communication environment, for example, the release of the Sl/Iu connection, the service request, and the access network element due to the movement of the user equipment. Switch and so on. In the following, some of these cases will be explained in conjunction with Figs. 8 through 11.

图 8是示出在 Sl/Iu连接释放时，本地网关和接入网元之间的连接释放的流程的示意图。 Sl/Iu 连接释放通常发生在用户不再进行业务而从连接态转为空闲态，无线资源被释放时。如图 12所示， S21 , 在 Sl/Iu连接释放时，接入网元或者移动性管理网元发起该 Sl/Iu释放流程，以释放无线侧资源。 S22, 进行 Sl/Iu释放的其它流程，从而完成 Sl/Iu的释放。这里，本领域技术人员可以理解除了图中所示的流程外，完成 Sl/Iu的释放还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。 S23 , 由于无线资源，包括接入网元为用户分配的资源已经释放，根据建立 LIPA或 SIPTO PDN连接时的标记（具体参见图 7 中的 S12 ), 移动性管理网元判断存在 LIPA或 SIPTO PDN 连接，则向本地网关发送改变通知请求（Change Notification Request ) 消息。 S23, 在收到该改变通知请求消息之后，本地网关将下行数据包发送到服务网关。在本发明的实施例中，通知本地网关将下行数据包的发送到服务网关具体可以是如下两种方式： Figure 8 is a diagram showing the flow of connection release between the local gateway and the access network element when the Sl/Iu connection is released. The Sl/Iu connection release usually occurs when the user no longer performs services and transitions from the connected state to the idle state, when the wireless resources are released. As shown in FIG. 12, S21, when the Sl/Iu connection is released, the access network element or the mobility management network element initiates the Sl/Iu release process to release the radio side resources. S22, performing other processes of Sl/Iu release, thereby completing the release of Sl/Iu. Here, those skilled in the art can understand which processes are required to complete the release of the Sl/Iu in addition to the flow shown in the figure. In order to highlight the focus of the embodiments of the present invention, details are not described herein. S23. The radio resource, including the resource allocated by the access NE for the user, has been released. According to the flag when establishing the LIPA or SIPTO PDN connection (refer to S12 in FIG. 7), the mobility management NE determines that the LIPA or SIPTO PDN exists. Connect, send a Change Notification Request message to the local gateway. S23. After receiving the change notification request message, the local gateway sends the downlink data packet to the serving gateway. In the embodiment of the present invention, the local gateway is notified that the sending of the downlink data packet to the service gateway may be specifically as follows:

方式一：移动性管理网元在改变通知请求消息中包括服务网关为用户分配的用户面信息，并发送到本地网关。其中服务网关的分配的用户面信息由服务网关在建立 PDN连接时发送到移动性管理网元（请参考图 7中的步骤 S13 )。随后，在收到该改变通知请求消息后，本地网关在本地保存了接收到的用户面信息，从而在收到下行数据包后，根据接收到的用户面信息发送下行数据包到服务网关，具体为，将下行数据包的目的 TEID和 IP地址填写为服务网关分配的 TEID和 IP地址，从而将下行数据包发送到服务网关。 Manner 1: The mobility management network element includes the user plane information allocated by the service gateway for the user in the change notification request message, and sends the information to the local gateway. The allocated user plane information of the serving gateway is sent by the serving gateway to the mobility management network element when establishing the PDN connection (refer to step S13 in FIG. 7). Then, after receiving the change notification request message, the local gateway locally saves the received user plane information, and after receiving the downlink data packet, sends the downlink data packet to the service gateway according to the received user plane information, specifically Therefore, the destination TEID and the IP address of the downlink data packet are filled in as the TEID and the IP address allocated by the serving gateway, so that the downlink data packet is sent to the serving gateway.

方式二：移动性管理网元在改变通知请求消息中指示本地网关无线资源不可用或者切换用户面。收到该改变通知请求消息后，本地网关根据接收到的服务网关分配的用户面信息将用户下行数据发送到服务网关。这里，本地网关或者服务网关的方式具体参考图 7的 S12。在方式二的情况下，由服务网关在转发的创建会话请求消息中携带为用户分配的用户面消息，发送给本地网关后，本地网关必须保存。在本发明的实施例中， S23的目的在于由移动性管理网元指示本地网关将下行数据包发送到服务网关，该指示的方式可以是直接的指示，如方式二，也可以是间接的指示，如方式一，本发明的实施例并不意在进行任何具体的限定。 Manner 2: The mobility management network element indicates that the local gateway radio resource is unavailable or switches the user plane in the change notification request message. After receiving the change notification request message, the local gateway sends the user downlink data to the serving gateway according to the user plane information allocated by the received service gateway. Here, the manner of the local gateway or the serving gateway is specifically referred to S12 of FIG. In the case of mode two, by service The gateway carries the user plane message allocated for the user in the created session request message. After being sent to the local gateway, the local gateway must be saved. In the embodiment of the present invention, the purpose of S23 is to instruct the local gateway to send the downlink data packet to the serving gateway by the mobility management network element, and the indication may be a direct indication, such as mode 2, or an indirect indication. As in the first mode, the embodiments of the present invention are not intended to be any specific limitation.

随后， S24, 本地网关将该改变通知响应（ Change Notification Response ) 消息经由服务网关发送到移动性管理网元，从而完成接入网元和本地网关之间的释放过程。 Then, S24, the local gateway sends the change notification response (Change Notification Response) message to the mobility management network element via the serving gateway, thereby completing the release process between the access network element and the local gateway.

利用上述图 8所示的 Sl/Iu连接释放时，本地网关和接入网元之间的连接释放的流程，当用户的 Iu或者 S1连接释放时，无线资源被删除后，移动性管理网元可以及时通知本地网关将下行数据发送到服务网关，防止用户的下行数据丟失。同时，由于通知的指示信息包括在特别信元中，不需要服务网关的处理，避免了服务网关升级，既保证了业务进行又节约了运营商的升级成本。 When the connection of the S1/Iu connection shown in FIG. 8 is released, the connection between the local gateway and the access network element is released, and when the Iu or S1 connection of the user is released, the radio resource is deleted, and the mobility management network element is deleted. The local gateway can be notified in time to send downlink data to the service gateway to prevent the downlink data of the user from being lost. At the same time, since the indication information of the notification is included in the special cell, the processing of the service gateway is not required, and the service gateway upgrade is avoided, which not only ensures the service but also saves the upgrade cost of the operator.

在 Sl/Iu连接释放之后，如果用户想进行业务，需要恢复无线侧的承载，则用户设备发起服务请求流程。图 9是示出在 Sl/Iu连接释放之后，用户设备做出服务请求时的流程的示意图。如图 9所示， S31 , 用户设备向接入网元发送服务请求（Service Request )消息。 S32, 移动性管理网元判断用户是否存在 LIPA或 SIPTO PDN连接，如果判断用户存在 LIPA或 SIPTO PDN 连接，则移动性管理网元向接入网元发送初始上下文建立请求（Initial Context Setup Request ) 消息或 RAB指派请求 ( RAB assignment request ) 消息，且该消息中包括本地网关为用户分配的 TEID和 IP地址，其中 IP地址即上述的 LGW@LN。这里，移动性管理网元在图 7的 S13中获取了本地网关为用户分配的 TEID和 IP地址，并一直保存在用户的上下文中。 After the Sl/Iu connection is released, if the user wants to perform a service and needs to restore the bearer on the wireless side, the user equipment initiates a service request procedure. Fig. 9 is a diagram showing the flow when the user device makes a service request after the Sl/Iu connection is released. As shown in FIG. 9, S31, the user equipment sends a Service Request message to the access network element. S32. The mobility management network element determines whether the user has a LIPA or SIPTO PDN connection. If it is determined that the user has a LIPA or SIPTO PDN connection, the mobility management network element sends an Initial Context Setup Request message to the access network element. Or a RAB assignment request message, and the message includes a TEID and an IP address assigned by the local gateway to the user, where the IP address is the above LGW@LN. Here, the mobility management network element obtains the TEID and IP address assigned by the local gateway to the user in S13 of FIG. 7 and keeps it in the context of the user.

S33, 接入网元保存本地网关为用户分配的 TEID和 L-GW@LN, 并向移动性管理网元发送初始上下文建立响应（ Initial Context Setup response )消息或 RAB指派响应（ RAB assignment response ), 该消息中包括接入网元为用户分配的 TEID 以及用于与本地网关交互使用的 IP 地址，即上述的 H(e)NB@LN。 S33. The access NE saves the TEID and L-GW@LN allocated by the local gateway to the user, and sends an Initial Context Setup response message or a RAB assignment response to the mobility management network element. The message includes the TEID assigned by the access NE to the user and the IP address used for interaction with the local gateway, that is, the above H(e)NB@LN.

随后， S34, 完成服务请求的其它流程，这里，本领域技术人员可以理解除了图中所示的以外，完成服务请求还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。 Subsequently, S34, other processes of completing the service request, where those skilled in the art can understand, in addition to the figure, what processes are needed to complete the service request, in order to highlight the present invention. The focus of the application will not be repeated here.

535, 收到初始上下文建立响应消息后，由于建立的无线^载属于 LIPA 或 SIPTO PDN 连接，移动性管理网元将接入网元分配的用户面信息，即 TEID+IP地址包括在改变通知请求 ( change notification request ) 消息中发送到服务网关，收到该消息后，服务网关将该消息转发到本地网关。 535. After receiving the initial context setup response message, because the established radio bearer belongs to the LIPA or SIPTO PDN connection, the mobility management network element accesses the user plane information allocated by the network element, that is, the TEID+IP address is included in the change notification request. The (change notification request) message is sent to the service gateway. After receiving the message, the service gateway forwards the message to the local gateway.

536, 本地网关保存接入网元分配的 TEID和 IP地址，向服务网关发送改变通知响应（ change notification response ) 消息，月良务网关将该消息转发到移动性管理网元。此时，如在图 7所示的情况中，当有下行数据发送到本地网关时，本地网关根据接入网元分配的 TEID和 IP信息，将数据包直接发送到接入网元，并且当接入网元收到来自用户的上行数据时，根据本地网关分配的 TEID和 IP信息，将该上行数据发送到本地网关，再由本地网关发送到目的地址。与图 7的步骤 S16所示的相同，接入网元的用户面信息可以保存在不被月良务网关处理的信元中，比如 Private Extension。 536. The local gateway saves the TEID and the IP address allocated by the access NE, and sends a change notification response message to the serving gateway, and the monthly service gateway forwards the message to the mobility management network element. At this time, as in the case shown in FIG. 7, when downlink data is sent to the local gateway, the local gateway directly sends the data packet to the access network element according to the TEID and IP information allocated by the access network element, and when When receiving the uplink data from the user, the access network element sends the uplink data to the local gateway according to the TEID and IP information allocated by the local gateway, and then the local gateway sends the uplink data to the destination address. As shown in step S16 of Fig. 7, the user plane information of the access network element can be stored in a cell that is not processed by the monthly service gateway, such as Private Extension.

利用图 9所示的在 Sl/Iu连接释放之后，用户设备再次做出服务请求时的流程，当用户重新建立 Iu或者 S1连接以恢复无线资源时，移动性管理网元可以及时通知本地网关将下行数据直接发送到接入网元，减少数据转发路径迂回，节约传输成本。同时，由于采用不需要服务网关处理的例如改变通知请求消息，避免了服务网关升级，节约了运营商的升级成本。 After the release of the Sl/Iu connection shown in FIG. 9, the user equipment makes a service request again. When the user re-establishes the Iu or S1 connection to recover the wireless resource, the mobility management network element can notify the local gateway in time. The downlink data is directly sent to the access network element, which reduces the data forwarding path bypass and saves transmission costs. At the same time, the service gateway upgrade is avoided due to the change of the notification request message, which is processed by the service gateway, which saves the upgrade cost of the operator.

图 10是示出当接入网元改变时，如何建立新的接入网元与本地网关之间的隧道连接的流程的示意图。在实际的通信环境中，如果用户设备发生了移动，例如，从一个小区移动到另一个小区中，则可能从源接入网元接入目标接入网元，并且，当接入网元改变时，其所对应的移动性管理网元也可能发生改变，即，从源移动性管理网元接入目标移动性管理网元。图 10描述的就是在这种情况下建立新的接入网元与本地网关之间的隧道连接。 Figure 10 is a diagram showing the flow of how to establish a tunnel connection between a new access network element and a local gateway when the access network element changes. In an actual communication environment, if the user equipment moves, for example, from one cell to another, it may access the target access network element from the source access network element, and when the access network element changes The mobility management network element corresponding to the mobility management network element may also be changed, that is, the source mobility management network element is accessed from the source mobility management network element. Figure 10 depicts the tunnel connection between the new access network element and the local gateway in this case.

如图 10所示， S41 , 接收 UE测量报告以确定切换，比如目标小区的无线参数电平等达到切换要求。 S42, 源接入网元向源移动性管理网元发送切换要求 (Handover Required)消息。 S43 , 源移动性管理网元向目标移动性管理网元发送前转切换请求 (Forward Relocation Request)消息，该消息中包括本地网关为用户分配的 TEID和 IP地址，其中 IP地址为 L-GW@LN。如果用户存在 LIPA或 SIPTO PDN连接，源移动性管理网元需要在消息中指示目标侧哪些是 LIPA或 SIPTO PDN连接，该指示可以是显示的一个指示信元，比如 LIPA indication ( LIPA指示），也可以是隐式的指示信元，比如上下文中除了 L-GW@CN还存在 L-GW@LN即表明所述 PDN是 LIPA或 SIPTO PDN。S44, 完成从源接入网元向目标接入网元的其它切换流程。这里，本领域技术人员可以理解接入网元的切换还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。 As shown in FIG. 10, S41, receiving a UE measurement report to determine a handover, such as a radio parameter level of a target cell, etc., to achieve a handover requirement. S42. The source access NE sends a Handover Required message to the source mobility management network element. S43. The source mobility management network element sends a forward relocation request (Forward Relocation Request) message to the target mobility management network element, where the message includes a TEID and an IP address allocated by the local gateway for the user, where the IP address is L-GW@ LN. If the user has a LIPA or SIPTO PDN connection, the source mobility management network element needs to indicate in the message which of the target side is a LIPA or SIPTO PDN connection, and the indication may be an indication cell displayed, such as The LIPA indication (LIPA indication) may also be an implicit indication cell. For example, if L-GW@LN exists in the context except L-GW@CN, it indicates that the PDN is LIPA or SIPTO PDN. S44. Perform other switching processes from the source access NE to the target access NE. Here, those skilled in the art can understand which processes are required for the switching of the access network element. In order to highlight the key points of the embodiments of the present invention, details are not described herein.

S45 , 目标移动性管理网元向目标接入网元发送切换请求 (Handover Request)消息，该切换请求消息中包括本地网关为用户分配的 TEID和 IP地址。接入网元保存收到的信息并发送切换请求响应 (Handover Response)消息到目标移动性管理网元。该切换请求响应消息中包括接入网元为 LIPA或者 SIPTO PDN连接分配的用户面信息，即 TEID和 IP地址，其中 IP地址为响应 (Forward Relocation Response)消息。上述切换要求消息、前转切换请求消息、切换请求消息、切换响应消息和前转切换响应消息中包括目标建立的换流程。这里，本领域技术人员可以理解移动性管理网元的切换还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。 S45. The target mobility management network element sends a handover request (Handover Request) message to the target access network element, where the handover request message includes a TEID and an IP address allocated by the local gateway to the user. The access network element saves the received information and sends a Handover Response message to the target mobility management network element. The handover request response message includes the user plane information allocated by the access network element for the LIPA or the SIPTO PDN connection, that is, the TEID and the IP address, where the IP address is a Forward Relocation Response message. The handover request message, the forward handover request message, the handover request message, the handover response message, and the forward handover response message include a change process of the target establishment. Here, those skilled in the art can understand which processes are needed for the handover of the mobility management network element. In order to highlight the key points of the embodiments of the present invention, details are not described herein.

S48 , 移动性管理网元通知服务网关向本地网关发送更新消息以更新本地网关保存的下行用户面信息。 S491 , 由于是 LIPA或 SIPTO PDN连接，移动性管理网元将接入网元分配的用户面信息，即 TEID+IP地址包括在改变通知请求 (Change Notification Request)消息中发送到服务网关，其中 TEID+IP 地址信息封装在不被服务网关处理的信元中，比如 Private Extension 具体请参考图 7所示的在接入网元和本地网关之间建立隧道连接的流程。收到该消息后，服务网关将该消息转发到本地网关。 S492, 本地网关保存接入网元分配的 TEID和 IP信息，向月良务网关发送改变通知响应（ Change Notification Response ) 消息，且服务网关还将所述响应消息转发到移动性管理网元。此时，如在图 7所示的情况中，当有下行数据发送到本地网关时，本地网关根据接入网元分配的 TEID和 IP信息，将数据包直接发送到接入网元，并且当接入网元收到来自用户的上行数据时，根据本地网关分配的 TEID和 IP信息，将该上行数据发送到本地网关，再由本地网关发送到目的地址。 S48. The mobility management network element notifies the serving gateway to send an update message to the local gateway to update the downlink user plane information saved by the local gateway. S491, because the LIPA or the SIPTO PDN connection, the mobility management network element sends the user plane information allocated by the access network element, that is, the TEID+IP address, in the Change Notification Request message, to the serving gateway, where the TEID The IP address information is encapsulated in a cell that is not processed by the serving gateway. For example, the Private Extension refers to the process of establishing a tunnel connection between the access NE and the local gateway as shown in FIG. 7. After receiving the message, the service gateway forwards the message to the local gateway. S492: The local gateway saves the TEID and IP information allocated by the access network element, and sends a change notification response (Change Notification Response) message to the monthly service gateway, and the service gateway further forwards the response message to the mobility management network element. At this time, as in the case shown in FIG. 7, when downlink data is sent to the local gateway, the local gateway directly sends the data packet to the access network element according to the TEID and IP information allocated by the access network element, and when When receiving the uplink data from the user, the access network element sends the uplink data to the local gateway according to the TEID and IP information allocated by the local gateway, and then the local gateway sends the uplink data to the destination address.

利用图 10所示的接入网元改变时建立新的接入网元与本地网关之间的隧道连接的流程，当用户的接入网元发生改变时，移动性管理网元可以及时通知本地网关将下行数据发送到新的接入网元，避免数据包被丟掉，提高用户体验。同时，由于采用不需要服务网关处理的例如改变通知请求消息，避免了服务网关升级，节约了运营商的升级成本。 The process of establishing a new tunnel connection between the access network element and the local gateway when the access network element is changed as shown in FIG. 10, when the access network element of the user changes, the mobility management network element can be timely The local gateway is notified to send downlink data to the new access network element to prevent the data packet from being dropped and improve the user experience. At the same time, since the change notification request message is processed by the service gateway, for example, the service gateway upgrade is avoided, and the upgrade cost of the operator is saved.

需要说明的是，如果在接入网元发生改变的切换过程中，移动性管理网元没有发生改变，则省略上述图 10中的 S43、 S46和 S47, 此时源移动性管理网元和目标移动性管理网元是同一个网元。 It should be noted that, if the mobility management network element does not change during the handover process in which the access network element changes, the S43, S46, and S47 in FIG. 10 are omitted, and the source mobility management network element and the target are in this case. The mobility management network element is the same network element.

图 11是示出当接入网元改变时的 x2或者 RNC增强切换流程的示意图。当接入网元之间存在接口时，接入网元之间可以先完成切换流程再通知移动性管理网元，减少对移动性管理网元的影响。如图 11所示， S51 , 首先接收 UE测量报告以确定切换，比如目标小区的无线参数电平等达到切换要求。 S52, 执行 x2切换的其它流程或者增强的 RNC切换的其它流程，这里，本领域技术人员可以理解上述切换还需要哪些流程，为了突出本发明实施例的重点，在这里便不再赘述。 S53 , 目标接入网元向移动性管理网元发送路径切换流程请求 (Path Switch Request)消息，以请求更新下行用户面信息，该消息中包括接入网元对于 LIPA或 SIPTO PDN连接而为用户分配的用户面信息，即 TEID和 IP地址，其中 IP地址为 H(e)NB@LN。 S54, 移动性管理网元通过爹改 7 载请求 /响应（Modify Bearer Request/Response)通知月良务网关更新下行用户面信息。 Figure 11 is a diagram showing the x2 or RNC enhanced handover procedure when the access network element changes. When there is an interface between the access NEs, the access NEs can complete the handover process and then notify the mobility management NE to reduce the impact on the mobility management NE. As shown in FIG. 11, S51, first receives a UE measurement report to determine a handover, such as a radio parameter level of a target cell, to reach a handover requirement. S52, other processes for performing the x2 switchover or other processes of the enhanced RNC switch, and those skilled in the art can understand which processes are needed for the above-mentioned handover, and the details of the embodiments of the present invention are not limited herein. S53. The target access NE sends a Path Switch Request message to the mobility management network element to request to update the downlink user plane information, where the message includes the access network element being connected to the LIPA or the SIPTO PDN. The assigned user plane information, that is, the TEID and IP address, where the IP address is H(e)NB@LN. S54. The mobility management network element notifies the monthly service gateway to update the downlink user plane information by tampering with the Modify Bearer Request/Response.

S55 , 确定是 LIPA或 SIPTO PDN连接（确定 LIPA或 SIPTO PDN的方式请参考图 7所示的步骤 S12 ), 移动性管理网元将接入网元分配的用户面信息，即： TEID+IP地址包括在改变通知请求 (Change Notification Request) 消息中发送到服务网关，收到消息后，服务网关将所述消息转发到本地网关。 S55, determining that it is a LIPA or SIPTO PDN connection (refer to step S12 shown in FIG. 7 for the manner of determining the LIPA or SIPTO PDN), and the mobility management network element accesses the user plane information allocated by the network element, that is, the TEID+IP address. This is sent to the service gateway in the Change Notification Request message. After receiving the message, the service gateway forwards the message to the local gateway.

556, 本地网关保存接入网元分配的 TEID和 IP地址，并向服务网关发送改变通知响应 (Change Notification Response)消息，服务网关将该消息发送到移动性管理网元。同样的， TEID+IP地址可以封装在改变通知消息中的特别信元中，该信元不被服务网关处理，直接转发到本地网关，避免服务网关升级。556. The local gateway saves the TEID and the IP address allocated by the access network element, and sends a change notification response (Change Notification Response) message to the serving gateway, where the service gateway sends the message to the mobility management network element. Similarly, the TEID+IP address can be encapsulated in a special cell in the change notification message, which is not processed by the serving gateway and forwarded directly to the local gateway to avoid service gateway upgrade.

557, 移动性管理网元向目标接入网元发送路径切换确认消息（Path Switch Acknowledge ), 从而确认完成路径切换。 557. The mobility management network element sends a path switch acknowledgement message (Path Switch Acknowledge) to the target access NE to confirm that the path switch is completed.

此时，如在图 7所示的情况中，当有下行数据发送到本地网关时，本地网关根据接入网元分配的用户面信息，将数据包直接发送到接入网元，并且当接入网元收到来自用户的上行数据时，根据本地网关分配的用户面信息，将该上行数据发送到本地网关，再由本地网关发送到目的地址。 At this time, as in the case shown in FIG. 7, when the downlink data is sent to the local gateway, the local gateway sends the data packet directly to the access network element according to the user plane information allocated by the access network element, and is connected. When the incoming network element receives the uplink data from the user, according to the user plane information allocated by the local gateway, The uplink data is sent to the local gateway, and then sent by the local gateway to the destination address.

利用上述当接入网元改变时的 x2或者 RNC增强切换流程，当用户设备的接入网元发生改变时，移动性管理网元可以及时通知本地网关将下行数据发送到新的接入网元，避免数据包被丟掉，提高了用户体验。同时由于采用不需要服务网关处理的例如改变通知请求消息，避免了服务网关升级，节约了运营商的升级成本。 When the access network element of the user equipment changes, the mobility management network element can notify the local gateway to send the downlink data to the new access network element in time when the access network element of the user equipment is changed. , to avoid packet loss, and improve the user experience. At the same time, because the notification notification request message is processed by the service gateway, the service gateway upgrade is avoided, and the upgrade cost of the operator is saved.

图 12是示出了根据本发明实施例的实现 LIPA或 SIPTO的移动性的设备的框图，该设备 100可以包括在移动性管理网元中。具体地说，设备 100 包括：接收装置 101 , 从接入网元接收接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中第一 IP地址是接入网元用于与本地网关交互使用的 IP地址；发送装置 102, 经由服务网关的转发向本地网关发送第一消息，其中第一消息包括接入网元为用户设备分配的 TEID和第一 IP地址，且第一消息中的 TEID和第一 IP地址不需要服务网关处理而仅需要转发。 Figure 12 is a block diagram showing an apparatus for implementing mobility of LIPA or SIPTO, which may be included in a mobility management network element, in accordance with an embodiment of the present invention. Specifically, the device 100 includes: a receiving device 101, which receives, from an access network element, a tunnel endpoint identifier TEID and a first IP address allocated by the access network element to the user equipment, where the first IP address is used by the access network element The IP address of the local gateway is used by the local gateway; the sending device 102 sends the first message to the local gateway by using the forwarding of the serving gateway, where the first message includes the TEID and the first IP address allocated by the access network element for the user equipment, and the first message The TEID and the first IP address do not need to be processed by the serving gateway and only need to be forwarded.

通过上述根据本发明实施例的实现 LIPA或 SIPTO的移动性的方法和设备，可以在不升级服务网关的情况下实现 LIPA或 SIPTO PDN连接下的移动性功能，因此，通过避免服务网关的升级，节约了运营商的部署和维护成本。 Through the above method and device for implementing LIPA or SIPTO mobility according to an embodiment of the present invention, the mobility function under the LIPA or SIPTO PDN connection can be implemented without upgrading the service gateway, and therefore, by avoiding the upgrade of the service gateway, It saves operators' deployment and maintenance costs.

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

所属领域的技术人员可以清楚地了解到，为描述的方便和筒洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。 It will be apparent to those skilled in the art that, for the convenience of the description and the cleaning process, the specific operation of the system, the device and the unit described above may be referred to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个 ***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. Another point that is shown or discussed between each other The coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。 The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software function unit.

所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括： U盘、移动硬盘、只读存储器（ROM, Read-Only Memory )、随机存取存储器 ( RAM, Random Access Memory )、磁碟或者光盘等各种可以存储程序代码的介质。 The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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

Claims

权利要求 Rights request

1.一种实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO的移动性的方法，其特征在于，包括： A method for implementing local IP access LIPA or selecting an IP data stream to groom the mobility of SIPTO, comprising:

从接入网元接收所述接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中所述第一 IP地址是接入网元用于与本地网关交互使用的 IP地址； Receiving, by the access network element, the tunnel endpoint identifier TEID and the first IP address that are allocated by the access network element to the user equipment, where the first IP address is an IP address used by the access network element to interact with the local gateway;

经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 Sending, by the serving gateway, the access network element to the local gateway for the user equipment

TEID和第一 IP地址，其中，所述 TEID和第一 IP地址为服务网关收到后，服务网关转发到所述本地网关。 The TEID and the first IP address, where the TEID and the first IP address are received by the serving gateway, and the serving gateway forwards to the local gateway.

2. 如权利要求 1所述的方法，其特征在于，经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址的步骤具体包括： The method according to claim 1, wherein the step of transmitting, by the serving gateway, the TEID and the first IP address allocated by the access network element to the user equipment by the serving gateway comprises:

判断所述用户设备可以建立 LIPA或 SIPTO PDN连接，或者所述用户设备已经建立了 LIPA或 SIPTO PDN连接，则执行经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址的步骤。 Determining that the user equipment can establish a LIPA or SIPTO PDN connection, or the user equipment has established a LIPA or SIPTO PDN connection, and then sends a TEID allocated by the serving gateway to the local gateway to allocate the access network element to the user equipment. And the steps of the first IP address.

3. 如权利要求 1或 2所述的方法，其特征在于，当所述方法应用于在接入网元和本地网关之间建立隧道连接时， The method according to claim 1 or 2, wherein when the method is applied to establish a tunnel connection between an access network element and a local gateway,

所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤之前，进一步包括： Before the step of receiving, by the access network element, the TEID and the first IP address allocated by the access device for the user equipment, the method further includes:

从用户设备接收 LIPA或选择 SIPTO PDN的连接建立请求； Receiving a LIPA from a user equipment or selecting a connection establishment request for a SIPTO PDN;

根据建立 LIPA或 SIPTO分组数据网络 PDN连接的相关信息，判断所述用户设备是否能够建立 LIPA或 SIPTO PDN连接； Determining whether the user equipment can establish a LIPA or SIPTO PDN connection according to the information about establishing a PDN connection of the LIPA or SIPTO packet data network;

在所述用户设备能够建立 LIPA或 SIPTO PDN连接的情况下，向服务网关发送用于建立 LIPA或 SIPTO PDN连接的创建会话请求消息，并由所述服务网关向本地网关转发所述创建会话请求消息； And in the case that the user equipment is capable of establishing a LIPA or SIPTO PDN connection, sending a create session request message for establishing a LIPA or SIPTO PDN connection to the serving gateway, and forwarding, by the serving gateway, the create session request message to the local gateway ;

从所述本地网关接收经由所述服务网关转发的作为所述创建会话请求消息的响应的创建会话响应消息，所述服务网关转发的所述创建会话响应消息包括所述本地网关为所述用户设备分配的 TEIP和第二 IP地址以及所述服务网关为所述用户设备分配的用户面信息，其中，所述第二 IP地址是本地网关用于与接入网元交互使用的 IP地址； Receiving, by the local gateway, a create session response message that is sent by the service gateway as a response to the create session request message, where the create session response message forwarded by the service gateway includes the local gateway as the user equipment The assigned TEIP and the second IP address and the user plane information allocated by the serving gateway to the user equipment, where the second IP address is an IP address used by the local gateway to interact with the access network element;

向所述接入网元发送无线接入承载 RAB分配请求消息，所述 RAB分配请求消息包括所述本地网关为所述用户设备分配的 TEID和第二 IP地址；所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤具体为： Transmitting, by the access network element, a radio access bearer RAB allocation request message, where the RAB is allocated The request message includes a TEID and a second IP address that are allocated by the local gateway to the user equipment. The step of receiving, by the access network element, the TEID and the first IP address allocated by the access network element to the user equipment is specifically :

从接入网元接收作为所述 RAB分配请求消息的响应的 RAB分配响应消息，其中，所述 RAB分配响应消息包括所述接入网元为用户设备分配的 TEID 和第一 IP地址；以及 Receiving, by the access network element, an RAB allocation response message as a response to the RAB allocation request message, where the RAB allocation response message includes a TEID and a first IP address allocated by the access network element to the user equipment;

所述经由服务网关的转发向本地网关发送第一消息的步骤之后，进一步包括： After the step of sending the first message to the local gateway by forwarding by the serving gateway, the method further includes:

经由所述服务网关的转发从所述本地网关接收作为所述第一消息的响应的第一响应消息。 A first response message as a response to the first message is received from the local gateway via forwarding of the serving gateway.

4. 如权利要求 1或 2所述的方法，其特征在于，当所述方法应用于在 Sl/Iu连接释放之后用户设备发起服务请求时， The method according to claim 1 or 2, wherein when the method is applied to a user equipment to initiate a service request after the Sl/Iu connection is released,

经由接入网元的转发从用户设备接收服务请求消息； Receiving a service request message from the user equipment via forwarding of the access network element;

在所述用户设备能够建立 LIPA或 SIPTO PDN连接的情况下，向接入网元发送初始上下文建立请求消息，所述初始上下文建立请求消息包括本地网关为所述用户设备分配的 TEID和第二 IP地址，所述第二 IP地址是本地网关用于与接入网元交互使用的 IP地址； And sending an initial context setup request message to the access network element, where the initial context setup request message includes a TEID and a second IP allocated by the local gateway to the user equipment, where the user equipment can establish a LIPA or a SIPTO PDN connection. An address, where the second IP address is an IP address used by the local gateway to interact with the access network element;

所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤具体为： The step of receiving, by the access network element, the TEID and the first IP address allocated by the access network element for the user equipment is specifically:

从接入网元接收作为所述初始上下文建立请求消息的响应的初始上下文建立响应消息，其中所述初始上下文建立响应消息包括所述接入网元为所述用户设备分配的 TEID和第一 IP地址；以及 Receiving, by the access network element, an initial context setup response message as a response to the initial context setup request message, where the initial context setup response message includes a TEID and a first IP allocated by the access network element to the user equipment Address;

5. 如权利要求 1或 2所述的方法，其特征在于，当所述方法应用于从源接入网元接入目标接入网元时在新的接入网元与本地网关之间建立隧道连接时， The method according to claim 1 or 2, wherein when the method is applied to When the source access NE accesses the target access NE, when a tunnel connection is established between the new access NE and the local gateway,

由源接入网元接收用户设备的测量报告以确定切换； Receiving, by the source access network element, a measurement report of the user equipment to determine a handover;

从源接入网元接收切换要求消息； Receiving a handover request message from the source access network element;

向目标接入网元发送切换请求消息，所述切换请求消息中包括本地网关为所述用户设备分配的 TEID和第二 IP地址，所述第二 IP地址为本地网关用于与接入网元交互使用的 IP地址； Sending a handover request message to the target access network element, where the handover request message includes a TEID and a second IP address that are allocated by the local gateway to the user equipment, where the second IP address is used by the local gateway to access the network element. Interactively used IP address;

从目标接入网元接收作为所述切换请求消息的响应的切换响应消息，其中所述切换响应消息包括接入网元为所述用户设备分配的 TEID和第一 IP地址； Receiving, by the target access network element, a handover response message as a response to the handover request message, where the handover response message includes a TEID and a first IP address allocated by the access network element to the user equipment;

所述经由服务网关的转发向本地网关发送第一消息的步骤之前，进一步包括： Before the step of transmitting the first message to the local gateway by forwarding by the serving gateway, the method further includes:

通知服务网关向本地网关发送更新消息以更新本地网关的用户面信息；所述经由服务网关的转发向本地网关发送第一消息的步骤之后，进一步包括： The notification service gateway sends an update message to the local gateway to update the user plane information of the local gateway. After the step of sending the first message to the local gateway by forwarding the service gateway, the method further includes:

6. 如权利要求 5所述的方法，其特征在于，当从源接入网元接入目标接入网元时从源移动性管理网元接入目标移动性管理网元时， The method according to claim 5, wherein when the source mobility management network element accesses the target mobility management network element when the source access network element accesses the target access network element,

所述从源接入网元接收切换要求消息的步骤由源移动性管理网元执行：所述向目标接入网元发送切换请求消息的步骤之前，进一步包括：述前转切换请求消息包括本地网关为所述用户设备分配的 TEID和第二 IP地址； The step of receiving the handover request message from the source access network element is performed by the source mobility management network element: before the step of sending the handover request message to the target access network element, the method further includes: the forward handover request message includes local a TEID and a second IP address assigned by the gateway to the user equipment;

所述向目标接入网元发送切换请求消息的步骤之后，进一步包括：求消息的前转切换响应消息；所述向目标接入网元发送切换请求消息的步骤、所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤、所述通知服务网关向本地网关发送更新消息、所述经由服务网关的转发向本地网关发送第一述第一消息的响应的第一响应消息的步骤由目标移动性管理网元执行。 After the step of sending a handover request message to the target access NE, the method further includes: requesting a forward handover response message of the message; The step of sending a handover request message to the target access network element, the step of receiving, by the access network element, the TEID and the first IP address allocated by the access network element for the user equipment, and the notification service gateway to the local The step of sending, by the gateway, the update message, the first response message of the first message of the first message sent to the local gateway via the forwarding of the serving gateway is performed by the target mobility management network element.

7. 如权利要求 1或 2所述的方法，其特征在于，当所述方法应用于在 x2或者 RNC增强切换时在新的接入网元和本地网关之间建立隧道连接时，所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤之前，进一步包括： The method according to claim 1 or 2, wherein when the method is applied to establish a tunnel connection between a new access network element and a local gateway when the x2 or RNC enhanced handover, the slave Before the step of the access network element receiving the TEID and the first IP address allocated by the access network element for the user equipment, the method further includes:

由源接入网元接收用户设备测量报告以确定切换； Receiving, by the source access network element, a user equipment measurement report to determine a handover;

完成从源接入网元到目标接入网元的 x2或者 RNC增强切换；所述从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址的步骤具体为： The step of performing the x2 or the RNC enhanced switching from the source access NE to the target access NE is performed. The step of receiving the TEID and the first IP address allocated by the access NE for the user equipment is as follows:

从所述目标接入网元接收路径切换请求消息，所述路径切换请求消息包括接入网元为所述用户设备分配的 TEID和第一 IP地址； Receiving, by the target access network element, a path switch request message, where the path switch request message includes a TEID and a first IP address allocated by the access network element to the user equipment;

经由所述服务网关的转发从所述本地网关接收作为所述第一消息的响应的第一响应消息；以及 Receiving, by the forwarding of the serving gateway, a first response message as a response to the first message from the local gateway;

向所述目标接入网元发送路径切换确认消息，以完成路径切换确认。 Sending a path switch confirmation message to the target access NE to complete the path switch confirmation.

8. 如权利要求 1或 2所述的方法，其特征在于，当所述方法应用于用户无线资源释放时，经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址的步骤具体包括： The method according to claim 1 or 2, wherein, when the method is applied to the release of the user radio resource, the serving gateway sends the TEID allocated by the access network element to the user equipment to the local gateway. The steps of the first IP address specifically include:

向服务网关发送第一消息，其中所述第一消息包含所述用户设备分配的 TEID和第一 IP地址，以及指示所述本地网关将下行数据包发送到服务网关的指示信息。 Sending a first message to the serving gateway, where the first message includes a TEID and a first IP address allocated by the user equipment, and indication information indicating that the local gateway sends the downlink data packet to the serving gateway.

9. 如权利要求 1-8 中任意一项所述的方法，其特征在于，经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址的步骤具体包括： The method according to any one of claims 1 to 8, wherein the step of transmitting, by the serving gateway, the TEID and the first IP address allocated by the access network element to the user equipment to the local gateway is specific Includes:

向服务网关发送第一消息，其中所述第一消息包含封装所述用户设备分配的 TEID和第一 IP地址的信元，所述服务网关收到第一消息后，不解析所述信元而转发所述信元到所述本地网关。 Sending a first message to the serving gateway, where the first message includes a TEID that encapsulates the TEID and the first IP address allocated by the user equipment, and the service gateway does not parse the first message after receiving the first message. The cell is forwarded to the local gateway.

10. 如权利要求 9所述的方法，其特征在于，所述第一消息为改变通知消息，所述信元为私有扩展信元 Private Extension IE。 10. The method according to claim 9, wherein the first message is a change notification message, and the cell is a private extension cell Private Extension IE.

11. 一种实现本地 IP接入 LIPA或选择 IP数据流疏导 SIPTO的移动性的设备，其特征在于，包括： 11. A device for implementing local IP access LIPA or selecting an IP data stream to groom the mobility of SIPTO, comprising:

接收装置，用于从接入网元接收所述接入网元为用户设备分配的隧道端点标识 TEID和第一 IP地址，其中所述第一 IP地址是接入网元用于与本地网关交互使用的 IP地址； a receiving device, configured to receive, by the access network element, a tunnel endpoint identifier TEID and a first IP address that are allocated by the access network element to the user equipment, where the first IP address is used by the access network element to interact with the local gateway The IP address used;

发送装置，用于经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址，其中，所述 TEID和第一 IP地址为服务网关收到后，服务网关转发到所述本地网关。 a sending device, configured to send, by using a serving gateway, a TEID and a first IP address allocated by the access network element to the user equipment, where the TEID and the first IP address are received by the serving gateway, and the service is The gateway forwards to the local gateway.

12. 如权利要求 11 所述的设备，其特征在于，所述发送装置经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址具体包括： The device according to claim 11, wherein the sending, by the sending device, the TEID and the first IP address that are allocated by the accessing network element to the user equipment by the serving gateway, specifically:

判断所述用户设备可以建立 LIPA或 SIPTO PDN连接，或者所述用户设备已经建立了 LIPA或 SIPTO PDN连接，则经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址。 Determining that the user equipment can establish a LIPA or SIPTO PDN connection, or the user equipment has established a LIPA or SIPTO PDN connection, and then the serving gateway sends the TEID assigned by the access network element to the user equipment to the local gateway. First IP address.

13. 如权利要求 11或 12所述的设备，其特征在于，当应用于在接入网元和本地网关之间建立隧道连接时， The device according to claim 11 or 12, wherein when applied to establish a tunnel connection between the access network element and the local gateway,

所述接收装置在从接入网元接收所述接入网元为用户设备分配的 TEID 和第一 IP地址之前进一步用于： The receiving device is further used to: before receiving, by the access network element, the TEID and the first IP address allocated by the access network element for the user equipment:

从所述本地网关接收经由所述服务网关转发的作为所述创建会话请求消息的响应的创建会话响应消息，所述服务网关转发的所述创建会话响应消息包括所述本地网关为所述用户设备分配的 TEIP和第二 IP地址以及所述服务网关为所述用户设备分配的用户面信息，其中，所述第二 IP地址是本地网关用于与接入网元交互使用的 IP地址； Receiving, by the local gateway, a create session response message that is sent by the service gateway as a response to the create session request message, where the create session response message forwarded by the service gateway includes the local gateway as the user equipment The assigned TEIP and the second IP address and the user plane information allocated by the serving gateway to the user equipment, where the second IP address is local The IP address used by the gateway to interact with the access NE;

向所述接入网元发送无线接入承载 RAB分配请求消息，所述 RAB分配请求消息包括所述本地网关为所述用户设备分配的 TEID和第二 IP地址；所述接收装置从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址具体为： Transmitting, by the access gateway, a radio access bearer RAB allocation request message, where the RAB allocation request message includes a TEID and a second IP address allocated by the local gateway to the user equipment; The TEID and the first IP address that are allocated by the access network element to the user equipment are:

所述发送装置在经由服务网关的转发向本地网关发送第一消息之后进一步用于： The transmitting device further uses for transmitting the first message to the local gateway after forwarding via the serving gateway:

14. 如权利要求 11或 12所述的设备，其特征在于，当应用于在 Sl/Iu 连接释放之后用户设备发起服务请求时， The device according to claim 11 or 12, wherein, when the user equipment initiates a service request after the Sl/Iu connection is released,

所述接收装置从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址具体为： The receiving device receives, from the access network element, the TEID and the first IP address allocated by the access network element to the user equipment, specifically:

所述发送装置经由服务网关的转发向本地网关发送第一消息之后进一步用于： The transmitting device further sends the first message to the local gateway after forwarding by the serving gateway, and is further used for:

经由所述服务网关的转发从所述本地网关接收作为所述第一消息的响应的第一响应消息。 Receiving, as a result of the first message, from the local gateway via forwarding of the serving gateway The first response message should be.

15. 如权利要求 11或 12所述的设备，其特征在于，当应用于从源接入网元接入目标接入网元时在新的接入网元与本地网关之间建立隧道连接时，所述接收装置从接入网元接收所述接入网元为用户设备分配的 TEID和第一 IP地址之前进一步用于： The device according to claim 11 or 12, wherein when a tunnel connection is established between a new access network element and a local gateway when the source access network element accesses the target access network element The receiving device is further used to: before receiving, by the access network element, the TEID and the first IP address allocated by the access network element for the user equipment:

所述发送装置经由服务网关的转发向本地网关发送第一消息之前进一步用于： The transmitting device further uses for forwarding the first message to the local gateway via the forwarding of the serving gateway:

通知服务网关向本地网关发送更新消息以更新本地网关的用户面信息；所述发送装置经由服务网关的转发向本地网关发送第一消息之后进一步用于： The notification service gateway sends an update message to the local gateway to update the user plane information of the local gateway; the sending device sends the first message to the local gateway via the forwarding of the serving gateway and further uses for:

16. 如权利要求 15所述的设备，其特征在于，当从源接入网元接入目标接入网元时从源移动性管理网元接入目标移动性管理网元时， The device according to claim 15, wherein when the source mobility management network element accesses the target mobility management network element when the source access network element accesses the target access network element,

所述目标移动性管理网元包括所述接收装置；以及 The target mobility management network element includes the receiving device;

所述源移动性管理网元进一步包括第二接收装置，用于从源接入网元接收切换要求消息： The source mobility management network element further includes a second receiving device, configured to receive a handover request message from the source access network element:

所述接收装置向目标接入网元发送切换请求消息之前进一步用于：从源移动性管理网元的所述第二接收装置接收前转切换请求消息，所述前转切换请求消息包括本地网关为所述用户设备分配的 TEID和第二 IP地址； Before the receiving device sends the handover request message to the target access NE, the method further includes: receiving, by the second receiving device of the source mobility management network element, a forward handover request message, where the forward handover request message includes a local gateway a TEID and a second IP address assigned to the user equipment;

所述接收装置向目标接入网元发送切换请求消息的步骤之后进一步用于： The receiving device further uses the step of sending a handover request message to the target access network element. In:

向所述源移动性管理网元的所述第二接收装置发送作为所述前转切换请求消息的前转切换响应消息。 A forward handover response message as the forward handover request message is transmitted to the second receiving device of the source mobility management network element.

17. 如权利要求 11或 12所述的设备，其特征在于，当应用于在 x2或者 RNC增强切换时在新的接入网元和本地网关之间建立隧道连接时， 17. The device according to claim 11 or 12, wherein when applied to establish a tunnel connection between a new access network element and a local gateway when the x2 or RNC enhanced handover,

18. 如权利要求 11或 12所述的设备，其特征在于，当应用于用户无线资源释放时， 18. The device according to claim 11 or 12, wherein, when applied to user radio resource release,

所述发送装置向服务网关发送第一消息，其中所述第一消息包含指示所述本地网关将下行数据包发送到服务网关的指示信息。 The transmitting device sends a first message to the serving gateway, where the first message includes indication information indicating that the local gateway sends the downlink data packet to the serving gateway.

19. 如权利要求 11-18中任意一项所述的设备，其特征在于，所述发送装置经过服务网关向本地网关发送所述接入网元为所述用户设备分配的 TEID和第一 IP地址具体包括： The device according to any one of claims 11 to 18, wherein the transmitting device sends, by the serving gateway, the TEID and the first IP allocated by the access network element to the user equipment to the local gateway. The address specifically includes:

所述发送装置向服务网关发送第一消息，其中所述第一消息包含封装所述用户设备分配的 TEID和第一 IP地址的信元，所述服务网关收到第一消息后，不解析所述信元而转发所述信元到所述本地网关。 The sending device sends a first message to the serving gateway, where the first message includes a TEID that encapsulates the TEID and the first IP address allocated by the user equipment, and the service gateway does not parse the first message after receiving the first message. The cell is forwarded to the local gateway.

20. 如权利要求 19所述的设备，其特征在于，所述第一消息为改变通知消息，所述信元为私有扩展信元 Private Extension IE。 The device according to claim 19, wherein the first message is a change notification message, and the cell is a private extension cell Private Extension IE.