WO2007147345A1 - Procédé de sélection d'entité plan utilisateur du côté réseau et d'entité plan contrôle - Google Patents

Procédé de sélection d'entité plan utilisateur du côté réseau et d'entité plan contrôle Download PDF

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Publication number
WO2007147345A1
WO2007147345A1 PCT/CN2007/001886 CN2007001886W WO2007147345A1 WO 2007147345 A1 WO2007147345 A1 WO 2007147345A1 CN 2007001886 W CN2007001886 W CN 2007001886W WO 2007147345 A1 WO2007147345 A1 WO 2007147345A1
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WIPO (PCT)
Prior art keywords
user equipment
plane entity
user
network
location information
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PCT/CN2007/001886
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English (en)
French (fr)
Inventor
Wenfu Wu
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007147345A1 publication Critical patent/WO2007147345A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/17—Selecting a data network PoA [Point of Attachment]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a network side user plane entity selection method and a control plane entity. Background technique
  • the existing General Packet Radio Service (GPRS)/Universal Mobile Telecommunications System (UMTS) network structure is shown in Figure 1. It adopts a similar structure to the second generation mobile communication system, including UMTS.
  • UMTS UMTS Territorial Radio Access Network
  • GERAN GSM/EDGE Radio Access Network
  • CN Core Network
  • UE User Equipment
  • GERAN/UTRAN is used to implement all wireless-related functions
  • CN handles all voice calls and data connections in the GPRS/UMTS system and is used to implement switching and routing functions with external networks.
  • the CN is logically divided into a Circuit Switched Domain (CS) and a Packet Switched Domain (PS), which support voice and data services, respectively.
  • CS Circuit Switched Domain
  • PS Packet Switched Domain
  • the CS domain includes nodes such as a mobile switching center server (MSC-Server), a media gateway (MGW), and a gateway mobile services switching center server (GMSC-Server).
  • MSC-Server mobile switching center server
  • MGW media gateway
  • GMSC-Server gateway mobile services switching center server
  • the MSC-Server is used to transmit control plane data of the CS domain, and implement functions such as mobility management, call control, and authentication encryption.
  • the GMSC-Server is used to implement the control plane function of the call control and mobility control of the GMSC. To achieve the transmission of user plane data.
  • the PS domain includes nodes such as a Serving General Packet Radio Service Support Node (SGSN) and a Gateway General Packet Radio Service Support Node (GGSN).
  • the GGSN is mainly responsible for interfacing with the external network. At the same time, the GGSN is also responsible for realizing the transmission of user plane data.
  • the location of the SGSN in the PS domain is similar to that of the MSC Server in the CS domain. Its core functions are to implement functions such as route forwarding, mobility management, session management, and user information storage.
  • the Home Location Register (HLR) is used to store user subscription information, and both the CS and PS domains use this device.
  • HLR Home Location Register
  • 3GPP is studying a new evolutionary network architecture, including System Architecture Evolution (SAE) and Long Term Evolution (LTE) of access networks, where the evolved access network is called E-UTRAN.
  • SAE System Architecture Evolution
  • LTE Long Term Evolution
  • An evolved packet core network architecture in the prior art is shown in FIG. 2, including a Mobility Management Entity (MME), a User Plane Entity (UPE), and a different access system.
  • MME Mobility Management Entity
  • UPE User Plane Entity
  • the MME is responsible for mobility management of the control plane, including user context and mobility state management, assigning user temporary identity, etc., corresponding to the control plane part of the internal SGSN of the current GPRS UMTS system; the UPE is responsible for initiating paging for downlink data in the idle state.
  • the management saves the IP bearer parameters and the intra-network routing information, etc., corresponding to the data plane part of the current GPRS/UMTS system internal SGSN and GGSN; Inter AS Anchor acts as the user plane anchor point between different access systems.
  • the Policy and Charging Rule Function (PCRF) is used for policy control decisions and flow accounting control functions.
  • the Home Subscriber Server (HSS) is used to store user subscription information.
  • the UE selects the Network Discovery and Access System Selection
  • the UE sends an attach request message (Attach Request) to the current MME/UPE;
  • the attach request message carries the old (previous) registration information
  • the current MME UPE sends a message (Send old registration information) to the old MME UPE to obtain the user information.
  • the old side MME UPE sends the user information (Send user information) to the current MME/UPE;
  • the current MME/UPE authenticates the UE (Authentication);
  • the HSS confirms the registration of the current MME UPE ( Confirm Registration );
  • the current MME UPE selects an Inter AS Anchor (Selection of Intersystem Mobility Anchor GW);
  • Inter AS Anchor uses the assigned IP address of the UE for IP layer configuration, UE and Inter AS
  • the user plane between the anchors is established, and the default accounting and policy rules are used;
  • the current MME/UPE provides the QoS configuration of the default IP bearer to the evolved radio access network
  • the current MME UPE accepts an attach request of the UE and allocates a temporary identifier of the UE.
  • the UE confirms the Attach Confirm.
  • the user attach procedure in the existing 23.882 protocol is described based on the MME/UPE on the same network entity, so there is no description of how the MME selects the UPE during the user attach procedure. If the MME UPE is not in the same network entity, the MME needs to select a UPE to serve the user in a process such as user attachment or Tracking Area Registration.
  • the embodiment of the invention provides a network side user plane entity selection method and a control plane entity, which implements the improvement and supplement of the prior art.
  • the user equipment initiates a service request to the network side control plane entity
  • the control plane entity acquires location information of the user equipment, and selects a network side user plane entity to serve the user equipment according to the location information.
  • a control surface entity including: a location information obtaining unit, configured to acquire location information of the user equipment and send the service request after receiving the service request initiated by the user equipment;
  • a selecting unit configured to receive location information of the user equipment sent by the location information acquiring unit, and select a network side user plane entity to serve the user equipment according to the location information of the user equipment.
  • the control plane entity when the user equipment initiates a service request to the network side control plane entity, acquires the location information of the user equipment, and selects a network side user plane entity as the user equipment according to the location of the user equipment. service. Therefore, the present invention provides a feasible service processing method for the network architecture in which the control plane entity and the user plane entity are separated, and is a perfection and supplement to the prior art.
  • FIG. 1 is a schematic structural diagram of a prior art GPRS/UMTS network
  • FIG. 2 is a schematic diagram of an evolved packet core network architecture in the prior art
  • 3 is a flowchart of implementing an implementation of UE attachment in an evolved packet core network in the prior art 3GPP TR 23.882 protocol;
  • FIG. 4 is a flowchart of a UE initiating an attach request in an evolved network according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a UE initiating a tracking area registration in an evolved network according to Embodiment 2 of the present invention
  • FIG. 6 is a flow chart of a UE initiating an activation PDP context request in a UMTS system according to Embodiment 3 of the present invention
  • FIG. 7A and FIG. 7B are schematic diagrams showing the structure of a control plane entity according to an embodiment of the present invention. detailed description
  • the network side user plane entity selection method provided by the embodiment of the present invention includes: the user equipment UE initiates a service request to the network side control plane entity; the control plane entity acquires the location information of the UE, and selects a network side user plane according to the UE location information. The entity serves it.
  • the location information of the UE and the network capable of providing services may be pre-stored on the network side.
  • Corresponding relationship of the user plane entity of the network side after acquiring the location information of the user equipment, the control plane entity queries the saved correspondence relationship, and selects a corresponding network side user plane entity to serve the UE.
  • the correspondence between the location information of the UE and the network side user plane entity that can provide the service may be stored in the network side control plane entity or in any functional entity on the network side.
  • a location information corresponds to multiple user plane entities that can provide services
  • one of the user plane entities is selected according to the load sharing principle.
  • Embodiment 1
  • the UE initiates an attach request in the evolved network, and the MME selects the UPE to serve the UE.
  • the specific signaling process is shown in Figure 4, including:
  • the UE selects the network access network and network (Network Discovery and Access System Selection);
  • the UE sends an attach request message (Attach Request) to the current MME of the evolved network; the evolved radio access network (Evolved RAN) carries the tracking area information of the UE when transmitting the attach request message of the UE to the current MME. And may further include an evolved radio access network identifier (identifying an evolved radio access network network element) information, and may also include a service area of the UE.
  • Attach Request an attach request message
  • Evolved RAN carries the tracking area information of the UE when transmitting the attach request message of the UE to the current MME.
  • an evolved radio access network identifier identifying an evolved radio access network network element
  • the attach request message carries the registration information of the old side (before the UE), the current MME sends a message (Send old registration information) to the old MME to obtain the information of the user;
  • the old side MME sends the user information (Send user information) to the current MME;
  • the current MME authenticates the UE (Authentication);
  • the HSS confirms the current MME registration ( Confirm Registration );
  • the current MME selects a UPE (Selection of UPE) used by the user according to the location information of the user; the specific method is:
  • the current MME obtains the tracking of the UE from the attach request message sent by the Evolved RAN.
  • the area information is then queried, and the corresponding relationship between the tracking area and the UPE can be configured in the MME or configured in other network side entities, if the correspondence between the tracking area and the UPE is configured.
  • the current MME queries the corresponding entity to obtain the UPE corresponding to the tracking area;
  • the current MME obtains the evolved radio access network identification information of the UE from the attach request message sent by the Evolved RAN, and then queries which UPE service (the evolved radio access network identifier and the evolved radio access network identifier can be used by the evolved radio access network identifier.
  • the correspondence between the UPEs may be configured in the MME or configured in other network side entities. If the correspondence between the evolved radio access network identifier and the UPE is configured in other network side entities, the current MME query Corresponding entity to obtain the UPE corresponding to the evolved radio access network identifier;
  • the current MME obtains the service area information of the UE from the attach request message sent by the Evolved RAN, and then queries which UPE service the service area can be used.
  • the correspondence between the service area and the UPE can be configured in the MME or other Configured in the network side entity, if the corresponding relationship between the service area and the UPE is configured in another network side entity, the current MME queries the corresponding entity to obtain the UPE corresponding to the service area);
  • the MME selects a UPE to process the user plane of the UE according to the query result. If a tracking area or an evolved radio access network identifier or a service area can be served by multiple UPEs, the MME selects one according to the principle of load sharing and the like. UPE; The specific load sharing principle (for example, selecting the UPE with the lowest current load, etc.) is not limited in the present invention.
  • This step includes:
  • the MME sends an activation request message to the selected UPE
  • UPE selects an Inter AS Anchor
  • the UPE returns an activation response message to the MME;
  • the current MME provides the default IP bearer QoS configuration to the evolved IP Bearer QoS.
  • the MME accepts an attach request of the UE and allocates a temporary identifier of the UE.
  • the UE confirms the Attach Confirm.
  • UPE and Inter AS Anchor are independent network entities, but the present invention does not limit other network architectures, such as UPE and Inter AS Anchor in a network entity.
  • step 9 of FIG. 4 The main difference between the process shown in FIG. 4 and the prior art attach process using the method of the embodiment of the present invention is embodied in step 9 of FIG. 4, and the MME performs UPE selection.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the UE initiates a tracking area registration request in the evolved network, and the MME selects the UPE to serve the UE.
  • the specific signaling process is shown in Figure 5, including:
  • the UE sends the tracking area registration message to the MME of the evolved network core network when the tracking area change occurs or the period tracking area update timer expires.
  • the Evolved RAN carries the tracking area information of the UE when sending the tracking area registration message of the UE to the MME.
  • the information of the evolved radio access network identifier (identifying an evolved radio access network network element) may also be included, and the service area information of the UE may also be included;
  • the MME selects a UPE (Selection of UPE) used by the user according to the location information of the user; the specific method is:
  • the MME obtains the tracking area information of the UE from the tracking area registration message sent by the Evolved RAN, and then queries which UPE service the tracking area can be used.
  • the correspondence between the tracking area and the UPE can be configured in the MME or other Configured in the network side entity, if the mapping between the tracking area and the UPE is configured in other network side entities, the MME queries the corresponding entity to obtain the UPE corresponding to the tracking area.
  • the MME obtains the evolved radio access network identification information of the UE from the tracking area registration message sent by the Evolved RAN, and then queries the evolved radio access network identifiers by which UPE services (evolved radio access network identifiers and The corresponding relationship between the UPEs may be configured in the MME or configured in other network side entities. If the mapping between the evolved radio access network identifier and the UPE is configured in other network side entities, the current MME queries the corresponding entity. To obtain the UPE corresponding to the evolved radio access network identifier; 3) The MME obtains the service area information of the UE from the tracking area registration message sent by the Evolved RAN, and then queries which UPE service the service area can be used.
  • UPE services evolved radio access network identifiers and The corresponding relationship between the UPEs may be configured in the MME or configured in other network side entities. If the mapping between the evolved radio access network identifier and the UPE is configured in other network side entities, the current MME queries the
  • the correspondence between the service area and the UPE can be configured in the MME or other Configured in the network side entity, if the mapping between the service area and the UPE is configured in another network side entity, the current MME queries the corresponding entity to obtain the UPE corresponding to the service area.
  • the MME selects a UPE to process the user plane of the UE according to the query result. If a tracking area or an evolved radio access network identifier or service area can be served by multiple UPEs, the MME selects one according to the principle of load sharing and the like. UPE; The specific load sharing principle (for example, selecting the UPE with the lowest current load, etc.) is not limited in the present invention.
  • the MME sends an activation context request message to the selected UPE (ie, the destination UPE);
  • the MME sends a delete context request message to the source UPE.
  • the destination UPE sends an activation context response message to the MME.
  • the source UPE sends a delete context response message to the MME.
  • the MME confirms the user's tracking area registration.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the UE initiates an activation PDP context request in the UMTS system, and the SGSN selects the GGSN to serve the UE.
  • Determining the user plane entity used by the UE according to the location information of the UE may also be applied to the GGSN selection under the One Tunnel mechanism in the UMTS system of the prior art.
  • the specific signaling process is shown in Figure 6, which includes:
  • the UE sends an "Activate PDP Context Request" message to the SGSN;
  • the SGSN selects the GGSN to be used according to the location information of the UE, and the following methods are as follows: 1) The SGSN obtains the routing area where the user is located from the user context it stores (Route Area,
  • the SGSN queries which GGSN services can be used by this routing area (the pair between the routing area and the GGSN)
  • the relationship may be configured in the SGSN or configured in other network entities. If the correspondence between the routing area and the GGSN is configured in other network side entities, the SGSN queries the corresponding network entity to obtain the GGSN corresponding to the routing area.
  • the SGSN obtains the access network identifier (identifying a network element of the access network) where the user is located from the user context it holds; if the access network is GERAN, the access network identifier is the GERAN identifier; Is UTRAN, then the access network identifier is the UTRAN identifier.
  • the SGSN queries which GGSN services the access network identifier can be used for.
  • the correspondence between the access network identifier and the GGSN can be configured in the SGSN or configured in other network entities, if the correspondence between the access network identifier and the GGSN Configured in other network side entities, the SGSN queries the corresponding network entity to obtain the GGSN corresponding to the access network identifier);
  • the SGSN obtains the service area information of the user from the user context it holds.
  • the SGSN queries which GGSN services can be used in this service area.
  • the correspondence between the service area and the GGSN can be configured in the SGSN or configured in other network entities. If the correspondence between the service area and the GGSN is configured on other network side entities.
  • the SGSN queries the corresponding network entity to obtain the GGSN corresponding to the access network identifier.
  • the SGSN obtains the Network Service Entity information of the user from the user context it holds.
  • the SGSN queries which GGSN services can be used by the network service entity (the correspondence between the network service entity and the GGSN can be configured in the SGSN or configured in other network entities, if the correspondence between the network service entity and the GGSN is configured in other In the network side entity, the SGSN queries the corresponding network entity to obtain the GGSN corresponding to the access network identifier;
  • the SGSN selects a GGSN to process the user plane of the UE. If a routing area or an access network identifier or a service area or a network service entity can be served by multiple GGSNs, the SGSN selects one of the GGSNs according to the principle of load sharing, and the specific load sharing principle (for example, selecting the GGSN with the lowest current load). The invention is not limited thereto.
  • the SGSN sends a "Create PDP Context Request” message to the selected GGSN; 4. The GGSN returns a "Create PDP Context Response” message to the SGSN;
  • the SGSN establishes a radio access bearer through a radio access bearer assignment procedure (RAB Assignment);
  • the SGSN sends a "Modify PDP Context Request" message to the GGSN;
  • the GGSN returns a "Modify PDP Context Response" message to the SGSN;
  • the SGSN returns a "Activate PDP Context Accept” message to the UE.
  • the foregoing embodiment discloses a method for selecting, by the MME, the corresponding UPE to serve the UE according to the tracking area of the UE or the evolved radio access network identifier or the service area in the evolved network architecture where the MME and the UPE are separated.
  • a method for selecting a GGSN to serve a UE by the SGSN under the One Tunnel mechanism in the existing UMTS system is also disclosed.
  • a corresponding structure implementation of a control plane entity is as shown in FIG. 7A, and includes:
  • the location information obtaining unit 10 is configured to acquire the location information of the user equipment and send the service request after receiving the service request initiated by the user equipment;
  • the selecting unit 20 is configured to receive the location information of the user equipment sent by the location information acquiring unit 10, and select a network side user plane entity to serve the user equipment according to the location information of the user equipment.
  • FIG. 7B A corresponding configuration of a preferred control plane entity is shown in FIG. 7B, which is different from FIG. 7A in that it further includes a storage unit 30 for storing location information of the user equipment and a network side user capable of providing services. Corresponding relationship of the face entities; the selecting unit 20 queries the corresponding relationship stored in the storage unit 30 according to the received location information of the user equipment, and selects a network side user plane entity to serve the user equipment.
  • the control plane entity when the user equipment initiates a service request to the network side control plane entity, the control plane entity acquires the location information of the user equipment, and selects a network side user plane according to the location of the user equipment.
  • the entity serves the user device. Therefore, the embodiment of the present invention provides a feasible service processing flow for the network architecture in which the control plane entity and the user plane entity are separated, which is a perfection and supplement to the prior art.
  • the corresponding relationship between the location information of the user equipment and the network side user plane entity capable of providing the service may be pre-stored on the network side; after the control plane entity obtains the location information of the user equipment, the corresponding information saved by the query is saved.
  • the location information may correspond to multiple user plane entities that can provide services, and select one of the user plane entities to serve the user equipment according to the load sharing principle, and the implementation method is simple, and the user plane entity load sharing can be implemented, and the network is improved.
  • Business processing capabilities and performance The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention.

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Description

一种网络侧用户面实体选择方法及控制面实体' 技术领域
本发明涉及移动通信领域， 尤其涉及一种网络侧用户面实体选择方法及 控制面实体。 背景技术
现有通用分组无线业务（ General Package Radio Service, GPRS ) /通用移 动通信系统 ( Universal Mobile Telecommunications System, UMTS ) 网络结构 如图 1所示， 采用了与第二代移动通信系统类似的结构， 包括 UMTS陆地无 线接入网（UMTS Territorial Radio Access Network, UTRAN )、 GSM/EDGE无 线接入网 （GSM/EDGE Radio Access Network, GERAN )、 核心网 （Core Network, CN )以及用户终端（ User Equipment, UE )。 其中， GERAN/UTRAN 用于实现所有与无线有关的功能， 而 CN处理 GPRS/UMTS系统内所有的话 音呼叫和数据连接， 并用于实现与外部网络的交换和路由的功能。 CN从逻辑 上分为电路交换域 ( Circuit Switched Domain, CS ) 和分组交换 i或 ( Packet Switched Domain, PS ), 分别支持话音和数据业务。
CS域包括移动交换中心服务器（MSC-Server )， 媒体网关（MGW )和网 关移动业务交换中心服务器 （GMSC-Server )等节点。 其中， MSC-Server用 于传输 CS域的控制面数据，实现移动性管理、呼叫控制以及鉴权加密等功能， GMSC-Server用于实现 GMSC的呼叫控制和移动性控制的控制面功能， MGW 用于实现用户面数据的传输。
PS 域包括服务通用分组无线业务支持节点 （SGSN ) 以及网关通用分组 无线业务支持节点 （GGSN )等节点。 其中， GGSN主要负责和外部网络进 行接口， 同时， GGSN还负责实现用户面数据的传输。 SGSN在 PS域中的位 置和 CS域的 MSC Server类似， 其核心功能是实现路由转发、 移动性管理、 会话管理以及用户信息存储等功能。 归属位置寄存器（ Home Location Register, HLR )用于存储用户签约信息， CS和 PS域都使用这个设备。
3GPP 为了增强未来网络的竟争能力， 正在研究一种全新的演进网络架 构， 包括系统架构演进（SAE )和接入网的长期演进（LTE ), 其中演进的接 入网称为 E-UTRAN，现有技术中的一种演进的分组核心网络架构如图 2所示， 包括移动性管理实体 ( Mobility Management Entity, MME )、用户面实体（ User Plane Entity, UPE )以及不同接入系统之间的用户面锚点（ Inter Access System Anchor, Inter AS Anchor )三个逻辑功能实体。 其中， MME负责控制面的移 动性管理， 包括用户上下文和移动状态管理， 分配用户临时身份标识等， 对 应于当前 GPRS UMTS系统内部 SGSN的控制平面部分； UPE负责空闲状态 下为下行数据发起寻呼， 管理保存 IP承载参数和网络内路由信息等， 对应于 当前 GPRS/UMTS系统内部 SGSN和 GGSN的数据平面部分； Inter AS Anchor 则充当不同接入系统间的用户面锚点。 策略和计费规则功能实体（Policy and Charging Rule Function, PCRF )用于策略控制决定和流计费控制功能。 归属 网络服务器 （ Home Subscriber Server, HSS )用于存储用户签约信息。
目前 3GPP TR 23.882协议中规定演进分组核心网中 UE附着的实现流程， 如图 3所示， 包括：
1、 UE 选择接入系统和网洛 ( Network Discovery and Access System Selection )；
2. UE发送附着请求消息（ Attach Request )到当前 MME/UPE;
3、如果附着请求消息中携带旧侧的（之前的）注册信息，则当前 MME UPE 发送消息（ Send old registration information )到旧侧的 MME UPE获取用户的 信息；
4、 旧侧 MME UPE 发送用户信息 （Send user information ) 给当前 MME/UPE;
5、 当前 MME/UPE对 UE进行鉴权（ Authentication );
6、 将当前 MME/UPE注册到 HSS中 （ Register MME/UPE ); 7、在旧侧 MME/UPE删除 UE的信息（ Delete UE registration information );
8、 HSS证实当前 MME UPE的注册（ Confirm Registration );
9、 当前 MME UPE选择一个 Inter AS Anchor ( Selection of Intersystem Mobility Anchor GW );
10、 Inter AS Anchor使用 UE的分配 IP地址进行 IP层配置， UE和 Inter AS
Anchor间的用户平面被建立， 缺省的计费和策略规则被使用；
11、 当前 MME/UPE提供缺省 IP承载的 QoS配置给演进的无线接入网；
12、 当前 MME UPE接受 UE的附着请求（Attach Accept ), 并分配 UE 的临时标识；
13、 UE确认附着成功 （ Attach Confirm )。
通过以上流程可以看出， 现有 23.882 协议中用户附着流程是基于 MME/UPE在同一个网络实体上来描述的， 所以没有描述在用户附着过程中 MME如何来选择 UPE的问题。 如果 MME UPE不在同一个网络实体的话， 则在用户附着或者跟踪区注册（ Tracking Area Registration )等流程中 MME需 要选择一个 UPE来为这个用户服务。
另外， 在现有 UMTS系统中， 提出了一种单一隧道（One Tunnel )机制 (即 UMTS 系统中数据面直接在 UTRAN和 GGSN之间处理， 而无需通过 SGSN来处理）， 在该 One Tunnel下， 需要进行 GGSN选择。 发明内容
本发明实施例提供一种网络侧用户面实体选择方法及控制面实体， 实现 对现有技术的完善和补充。
本发明实施例提供的网络侧用户面实体选择方法包括：
用户设备向网络侧控制面实体发起业务请求；
所述控制面实体获取所述用户设备的位置信息 , 并根据所述位置信息选 择一个网络侧用户面实体为该用户设备服务。
一种控制面实体， 包括： 位置信息获取单元， 用于接收到用户设备发起的业务请求后获取所述用 户设备的位置信息并发送；
选择单元， 用于接收所述位置信息获取单元发送的用户设备的位置信息， 根据所述用户设备的位置信息选择一个网络侧用户面实体为该用户设备服 务。
根据本发明实施例， 当用户设备向网络侧控制面实体发起业务请求时， 由控制面实体获取该用户设备的位置信息， 并根据该用户设备所在位置选择 一个网络侧用户面实体为该用户设备服务。 因此， 本发明针对控制面实体和 用户面实体分离的网络架构， 提供了一种可行的业务处理方法， 是对现有技 术的完善和补充。 附图说明
图 1为现有技术 GPRS/UMTS网络结构示意图；
图 2为现有技术中一种演进的分组核心网络架构示意图；
图 3为现有技术 3GPP TR 23.882协议中规定演进分组核心网中 UE附着 的实现流程图；
图 4为本发明实施例一 UE在演进网络发起附着请求的流程图；
图 5为本发明实施例二 UE在演进网络发起跟踪区注册的流程图； 图 6为本发明实施例三 UE在 UMTS系统中发起激活 PDP上下文请求的流 程图；
图 7A、 图 7B为本发明实施例提供的控制面实体的结构示意图。 具体实施方式
本发明实施例提供的网络侧用户面实体选择方法， 包括： 用户设备 UE向 网络侧控制面实体发起业务请求；控制面实体获取 UE的位置信息， 并根据该 UE位置信息选择一个网络侧用户面实体为其服务。
在实际应用中，可以在网络侧预先保存 UE的位置信息和能提供服务的网 络侧用户面实体的对应关系； 控制面实体获取用户设备的位置信息后， 查询 保存的对应关系， 选择出一个对应的网络侧用户面实体为该 UE服务。
UE 的位置信息和能提供服务的网络侧用户面实体的对应关系可以保存 在网络侧控制面实体中， 或网络侧任意功能实体中。 当一个位置信息对应多 个能提供服务的用户面实体时， 根据负荷分担原则选择出其中一个用户面实 体。
下面结合附图用具体实施例对本发明上述实施例方法进行详细描述。 实施例一：
UE在演进网络中发起附着请求， 由 MME选择 UPE为该 UE服务。 具体信令流程如图 4所示， 包括：
1、 UE 选择接入系统和网络 ( Network Discovery and Access System Selection );
2、 UE发送附着请求消息（ Attach Request )到演进网络的当前 MME; 演 进的无线接入网 （Evolved RAN )在发送 UE的附着请求消息到当前 MME时 携带这个 UE的跟踪区 （Trace Area )信息， 还可以包括演进的无线接入网标 识（标识一个演进的无线接入网网元）信息， 还可以包括这个 UE 的业务区
( Service Area )信息；
3、如果附着请求消息中携带旧侧的（UE之前的）注册信息，则当前 MME 发送消息（ Send old registration information )到旧侧 MME获取用户的信息；
4、 旧侧 MME发送用户信息（ Send user information )给当前 MME;
5、 在当前 MME对 UE进行鉴权（ Authentication );
6、 将当前 MME注册到 HSS中 （ Register MME );
7、 在旧侧 MME删除用户的信息（ Delete UE registration information );
8、 HSS证实当前 MME的注册（ Confirm Registration );
9、 当前 MME根据用户所在的位置信息来选择用户所使用的一个 UPE ( Selection of UPE ); 具体方法为：
1 )当前 MME从 Evolved RAN发送的附着请求消息中获取 UE所在的跟踪 区信息， 然后查询这个跟踪区能被哪些 UPE服务（跟踪区和 UPE之间的对应 关系可以在 MME 中进行配置或者在其它网络侧实体中配置， 如果跟踪区和 UPE之间的对应关系配置在其它网络侧实体中， 则当前 MME查询对应实体 来获取跟踪区所对应的 UPE );
2 ) 当前 MME从 Evolved RAN发送的附着请求消息中获取 UE所在的演 进的无线接入网标识信息， 然后查询这个演进的无线接入网标识能被哪些 UPE服务（演进的无线接入网标识和 UPE之间的对应关系可以在 MME中进 行配置或者在其它网络侧实体中配置， 如果演进的无线接入网标识和 UPE之 间的对应关系配置在其它网 ^"侧实体中，则当前 MME查询对应实体来获取演 进的无线接入网标识所对应的 UPE );
3 ) 当前 MME从 Evolved RAN发送的附着请求消息中获取 UE所在的业 务区信息， 然后查询这个业务区能被哪些 UPE服务（业务区和 UPE之间的对 应关系可以在 MME中进行配置或者在其它网络侧实体中配置，如果业务区和 UPE之间的对应关系配置在其它网络侧实体中， 则当前 MME查询对应实体 来获取业务区所对应的 UPE );
MME根据查询结果，选择一个 UPE来处理该 UE的用户面； 如果一个跟 踪区或者演进的无线接入网标识或者业务区能被多个 UPE服务， 则 MME根 据负荷分担等原则来选择其中的一个 UPE; 具体的负荷分担原则 （例如选择 当前负荷最小的 UPE等）本发明对此不作限定。
10、 建立 UE和 UPE、 Inter AS Anchor间的用户平面， 缺省的计费和策略 规则被使用 （ User Plane Route Configuration );
该步骤包括：
MME发送激活请求消息给选择的 UPE;
UPE选择一个 Inter AS Anchor;
UPE回激活响应消息给 MME;
11、 当前 MME 提供缺省 IP 承载的 QoS 配置给演进的无线接入网 ( Configure IP Bearer QoS ); 12、 MME接受 UE的附着请求（ Attach Accept )， 并分配 UE的临时标识；
13、 UE确认附着成功 （ Attach Confirm )。
上述流程中是以 UPE和 Inter AS Anchor为独立的网络实体为例， 但本发 明不限制其它的网络架构， 例如 UPE和 Inter AS Anchor在一个网絡实体中。
采用本发明实施例方法的图 4所示流程与现有技术附着流程的主要差异， 体现在图 4的步骤 9中， 由 MME进行 UPE的选择。
实施例二：
UE在演进网络中发起跟踪区注册请求，由 MME选择 UPE为该 UE服务。 具体信令流程如图 5所示， 包括：
1、 当发生跟踪区变化或者周期跟踪区更新定时器超时后 UE发送跟踪区 注册消息到演进网络核心网的 MME; Evolved RAN在发送 UE的跟踪区注 册消息到 MME时携带这个 UE的跟踪区信息，还可以包括演进的无线接入网 标识（标识一个演进的无线接入网网元）信息， 还可以包括这个 UE的业务区 信息；
2、 MME 根据用户所在的位置信息来选择用户所使用的一个 UPE ( Selection of UPE ); 具体方法为：
1 ) MME从 Evolved RAN发送的跟踪区注册消息中获取 UE所在的跟踪 区信息 , 然后查询这个跟踪区能被哪些 UPE服务（跟踪区和 UPE之间的对应 关系可以在 MME 中进行配置或者在其它网络侧实体中配置， 如果跟踪区和 UPE之间的对应关系配置在其它网络侧实体中， 则 MME查询对应实体来获 取跟踪区所对应的 UPE );
2 ) MME从 Evolved RAN发送的跟踪区注册消息中获取 UE所在的演进 的无线接入网标识信息， 然后查询这个演进的无线接入网标识能被哪些 UPE 服务（演进的无线接入网标识和 UPE之间的对应关系可以在 MME中进行配 置或者在其它网络侧实体中配置， 如果演进的无线接入网标识和 UPE之间的 对应关系配置在其它网络侧实体中，则当前 MME查询对应实体来获取演进的 无线接入网标识所对应的 UPE ); 3 ) MME从 Evolved RAN发送的跟踪区注册消息中获取 UE所在的业务 区信息， 然后查询这个业务区能被哪些 UPE服务（业务区和 UPE之间的对应 关系可以在 MME 中进行配置或者在其它网络侧实体中配置， 如果业务区和 UPE之间的对应关系配置在其它网络侧实体中， 则当前 MME查询对应实体 来获取业务区所对应的 UPE );
MME根据查询结果，选择一个 UPE来处理该 UE的用户面；如果一个跟 踪区或者演进的无线接入网标识或者业务区能被多个 UPE服务， 则 MME根 据负荷分担等原则来选择其中的一个 UPE; 具体的负荷分担原则 （例如选择 当前负荷最小的 UPE等）本发明对此不作限定。
3、 如果选择的 UPE与原来用户上下文中的 UPE不一致， 则 MME发送 激活上下文请求消息到选择的 UPE (即目的 UPE );
4、 MME发送删除上下文请求消息到源 UPE;
5、 建立目的 UPE和 Inter AS Anchor之间的用户平面；
6、 目的 UPE发送激活上下文响应消息给 MME;
7、 源 UPE发送删除上下文响应消息给 MME;
8、 MME证实用户的跟踪区注册。
实施例三：
UE在 UMTS系统中发起激活 PDP上下文请求， 由 SGSN选择 GGSN为 该 UE服务。
根据 UE的位置信息来确定 UE使用的用户面实体也可以应用到现有技术 的 UMTS系统中 One Tunnel机制下的 GGSN选择上。具体信令流程如图 6所 示， 包括：
1、 UE发送 "激活 PDP上下文请求" 消息到 SGSN;
2、 SGSN根据 UE所在的位置信息来选择所使用的 GGSN, 如下方法为： 1)SGSN从它保存的用户上下文中获取用户所在的路由区 （Route Area,
RA )信息；
SGSN查询这个路由区能被哪些 GGSN服务（路由区和 GGSN之间的对 应关系可以在 SGSN 中进行配置或者在其它网络实体中配置， 如果路由区和 GGSN之间的对应关系配置在其它网络侧实体中， 由 SGSN查询对应网络实 体来获取路由区所对应的 GGSN );
2 ) SGSN从它保存的用户上下文中获取用户所在的接入网标识（标识接 入网的一个网元）信息； 如果接入网是 GERAN , 则接入网标识为 GERAN标 识； 如果接入网是 UTRAN， 则接入网标识为 UTRAN标识。
SGSN查询这个接入网标识能被哪些 GGSN服务（接入网标识和 GGSN 之间的对应关系可以在 SGSN 中进行配置或者在其它网络实体中配置， 如果 接入网标识和 GGSN之间的对应关系配置在其它网络侧实体中， 由 SGSN查 询对应网络实体来获取接入网标识所对应的 GGSN );
3)如果 UE在 UTRAN系统接入， 则 SGSN从它保存的用户上下文中获 取用户所在的业务区 （Service Area )信息。
SGSN查询这个业务区能被哪些 GGSN服务（业务区和 GGSN之间的对 应关系可以在 SGSN中进行配置或者在其它网络实体中配置， 如果业务区和 GGSN之间的对应关系配置在其它网络侧实体中， 由 SGSN查询对应网络实 体来获取接入网标识所对应的 GGSN );
4 )如果 UE在 GERAN系统接入， 则 SGSN从它保存的用户上下文中获 取用户所在的网络业务实体 ( Network Service Entity )信息。
SGSN 查询这个网络业务实体能被哪些 GGSN服务（网络业务实体和 GGSN之间的对应关系可以在 SGSN中进行配置或者在其它网络实体中配置， 如果网络业务实体和 GGSN之间的对应关系配置在其它网络侧实体中， 由 SGSN查询对应网络实体来获取接入网标识所对应的 GGSN );
SGSN根据查询结果，选择一个 GGSN来处理该 UE的用户面。如果一个 路由区或者接入网标识或者业务区或者网络业务实体能被多个 GGSN服务， 则 SGSN根据负荷分担等原则来选择其中的一个 GGSN， 具体的负荷分担原 则 （例如选择当前负荷最小的 GGSN等）本发明对此不作限定。
3、 SGSN发送 "创建 PDP上下文请求" 消息到选择的 GGSN; 4、 GGSN回 "创建 PDP上下文响应" 消息到 SGSN;
5、 SGSN通过无线接入承载指派流程（ RAB Assignment )建立无线接入 承载；
6、 SGSN发 "修改 PDP上下文请求" 消息给 GGSN;
7、 GGSN回 "修改 PDP上下文响应" 消息给 SGSN;
8、 SGSN回 "激活 PDP上下文接受" 消息给 UE。
上述具体实施例公开了在 MME和 UPE分离的演进网络架构下，由 MME 根据 UE所在跟踪区或者演进的无线接入网标识或者业务区来选择相应 UPE 为 UE服务的方法。还公开了现有 UMTS系统中 One Tunnel机制下，由 SGSN 选择 GGSN为 UE服务的方法。
根据上述实施例提供的选择网络侧用户面实体的方法， 一种控制面实体 的对应结构实施例如图 7A所示， 包括：
位置信息获取单元 10, 用于接收到用户设备发起的业务请求后获取所述 用户设备的位置信息并发送；
选择单元 20,用于接收所述位置信息获取单元 10发送的用户设备的位置 信息， 根据所述用户设备的位置信息选择一个网络侧用户面实体为该用户设 备服务。
另一种较佳的控制面实体的对应结构实施例如图 7B所示， 其与图 7A的 区别在于， 还包括有存储单元 30， 用于存储用户设备的位置信息和能提供服 务的网络侧用户面实体的对应关系； 选择单元 20根据接收的用户设备的位置 信息， 查询存储单元 30中存储的对应关系， 选择出一个网络侧用户面实体为 该用户设备服务。
综上所述， 根据本发明实施例， 当用户设备向网络侧控制面实体发起业 务请求时， 由控制面实体获取该用户设备的位置信息， 并根据该用户设备所 在位置选择一个网络侧用户面实体为该用户设备服务。 因此， 本发明实施例 针对控制面实体和用户面实体分离的网络架构， 提供了一种可行的业务处理 流程， 是对现有技术的完善和补充。 根据本发明实施例提供的方法， 可以在网络側预先保存用户设备的位置 信息和能提供服务的网络侧用户面实体的对应关系； 控制面实体获取用户设 备的位置信息后， 通过查询保存的对应关系， 选择出一个对应的网络侧用户 面实体为该用户设备服务。 其中， 一个位置信息可以对应多个能提供服务的 用户面实体， 并根据负荷分担原则选择出其中一个用户面实体为该用户设备 服务， 实现方法简单， 且能实现用户面实体负荷分担， 提高网络业务处理能 力和性能。 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种网络侧用户面实体选择方法， 其特征在于， 包括：
用户设备向网络侧控制面实体发起业务请求；
所述控制面实体获取所述用户设备的位置信息， 并根据所述位置信息选 择一个网络侧用户面实体为该用户设备服务。
2、 如权利要求 1所述的方法， 其特征在于， 在网络侧预先保存用户设备 的位置信息和能提供服务的网络侧用户面实体的对应关系；
所述控制面实体获取用户设备的位置信息后， 查询所述对应关系， 选择 出一个对应的网络侧用户面实体为该用户设备服务。
3、 如权利要求 2所述的方法， 其特征在于， 所述对应关系保存在网络侧 控制面实体中或网络侧任意功能实体中。
4、 如权利要求 2所述的方法， 其特征在于， 所述位置信息和所述用户面 实体的对应关系为：
一个位置信息对应一个能提供服务的所述用户面实体； 或者
一个位置信息对应多个能提供服务的所述用户面实体。
5、 如权利要求 4所述的方法， 其特征在于， 当一个位置信息对应多个能 提供服务的所述用户面实体时， 根据负荷分担原则选择出其中一个用户面实 体为该用户设备服务。
6、 如权利要求 2-5任意权项所述的方法， 其特征在于， 所述用户设备向 网络侧控制面实体发起业务请求， 具体包括：
所述用户设备向演进网络发起业务请求； 演进接入网发送用户的业务请 求到演进网络核心网的控制面实体， 携带该用户设备的跟踪区信息， 或者携 带演进的无线接入网标识信息， 或者携带用户设备的业务区信息；
所述控制面实体获取所述用户设备的位置信息， 并根据所述位置信息选 择一个网络侧用户面实体为该用户设备服务， 具体包括：
所述演进网络核心网的控制面实体从所述业务请求消息中获取用户设备 所在的跟踪区信息或者演进的无线接入网标识信息或者业务区信息， 查询保 存的跟踪区信息或者演进的无线接入网标识信息或者业务区信息与演进网络 核心网用户面实体的对应关系， 选择出一个与该用户设备所在跟踪区或者演 进的无线接入网标识或者业务区对应的演进网络核心网用户面实体为该用户 设备服务。
7、 如权利要求 6所述的方法， 其特征在于， 所述用户设备向网絡侧控制 面实体发起业务请求， 包括： 所迷用户设备向演进网络发起附着请求、 跟踪 区更新请求或切换请求。
8、 如权利要求 2-5任意权项所述的方法， 其特征在于， 所述用户设备向 网络侧控制面实体发起业务请求， 具体包括：
所述用户设备向通用移动通信系统 UMTS的服务通用分组无线业务支持 节点 SGSN发起业务请求；
所述控制面实体获取所述用户设备的位置信息， 并根据所述位置信息选 择一个网络侧用户面实体为该用户设备服务， 具体包括：
所述 SGSN从用户上下文中获取该用户设备所在的路由区信息或者接入 网标识信息或者业务区信息或者网络业务实体信息， 查询保存的路由区信息 或者接入网标识信息或者业务区信息或者网络业务实体信息与网关通用分组 无线业务支持节点 GGSN的对应关系， 选择出一个与该用户设备所在路由区 对应的 GGSN为该用户设备服务。
9、 如权利要求 8所述的方法， 其特征在于， 所述用户设备向网络侧控制 面实体发起业务请求， 包括： 所述用户设备向 UMTS的 SGSN发起激活 PDP 上下文请求。
10、 一种控制面实体， 其特征在于， 包括：
位置信息获取单元， 用于接收到用户设备发起的业务请求后获取所述用 户设备的位置信息并发送；
选择单元， 用于接收所述位置信息获取单元发送的用户设备的位置信息， 根据所述用户设备的位置信息选择一个网络侧用户面实体为该用户设备服 务。
11、 如权利要求 10所述的控制面实体， 其特征在于， 还包括： 存储单元， 用于存储用户设备的位置信息和能提供服务的网络侧用户面 实体的对应关系；
所述选择单元根据接收的用户设备的位置信息， 查询所述存储单元中存 储的所述对应关系， 选择出一个网络侧用户面实体为该用户设备服务。
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