WO2010105462A1 - 用户设备附着的处理方法、移动性管理实体以及用户设备 - Google Patents

用户设备附着的处理方法、移动性管理实体以及用户设备 Download PDF

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Publication number
WO2010105462A1
WO2010105462A1 PCT/CN2009/073584 CN2009073584W WO2010105462A1 WO 2010105462 A1 WO2010105462 A1 WO 2010105462A1 CN 2009073584 W CN2009073584 W CN 2009073584W WO 2010105462 A1 WO2010105462 A1 WO 2010105462A1
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Prior art keywords
emergency
user equipment
state
mobility management
management entity
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PCT/CN2009/073584
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English (en)
French (fr)
Inventor
朱春晖
宗在峰
李志军
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中兴通讯股份有限公司
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Publication of WO2010105462A1 publication Critical patent/WO2010105462A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • the present invention relates to the field of communications, and in particular, to a processing method for attaching a user equipment, a mobility management entity, and a user equipment.
  • IP Internet Multimedia Protocol
  • the IMS is characterized by a session initiation protocol (Session). Initiation Protocol, called SIP) system, communication and access independent, can have multiple media service control functions and bearer separation, call and session separation, application and service separation, service and network separation, and mobile network and Internet
  • SIP session initiation protocol
  • SIP Session
  • FIG. 1 is a schematic diagram of a user equipment (User Equipment, referred to as a UE) according to the related art, performing emergency services by accessing an SAE network. As shown in FIG. 1, a solid line indicates signaling, and a dotted line indicates a user's IP. Channel, Figure 1 depicts the primary network element involved in an emergency call to the IMS under SAE access.
  • a UE User Equipment
  • the network element includes: a network element of the SAE network part, which is used to provide the underlying bearer management and mobility management.
  • the network element of the Policy Charging Control (PCC) part is used to establish effective policy and charging control in the lower layer and the upper layer.
  • a network element of a part of the location service (LCS) is used to provide location services for emergency calls and addresses of public safety access points (PNAs).
  • PNAs public safety access points
  • Part of the IMS emergency service used to control and handle sessions for emergency calls.
  • the network elements in the SAE part mainly include: an enhanced wireless base station (eNodeB), which is a control device for the main air interface resources of the next generation radio access network, and can provide higher uplink and downlink rates, lower transmission delays, and More reliable wireless transmission.
  • eNodeB enhanced wireless base station
  • a Mobility Management Entity is responsible for managing and storing UE contexts (eg, UE/user identity, mobility management status, user security parameters, etc.), assigning temporary identifiers to users, when the UE is camped on The tracking area or the network is responsible for authenticating the user.
  • the UE is connected to the eNodeB through a long-term evolution (Long-Term Evolution, LTE)-UU, and the eNodeB is connected to the MME through the S1-MME.
  • the SAE gateway (Gateway, called GW) is a user plane function entity for user plane data routing processing. It is divided into a service gateway (Serving Gateway, called S-GW) and a packet data network gateway (Packet Data Network Gateway).
  • the barrel is called P-GW) Two SAE GWs.
  • the S-GW is a mobile 4 seedling between the SAE system and the traditional 3rd Generation Partnership Project (3GPP) system and an Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network).
  • the tube is called E-UTRAN) and moves between 4 seedlings.
  • the P-GW is a border gateway between the SAE and the Packet Data Network (PDN). It is responsible for PDN access and forwarding data between the SAE and the PDN.
  • the S-GW is connected to the eNodeB through S1-U and connected to the P-GW through S5.
  • the Policy and Charging Control (PCC) part includes: Policy and Charging Rules Function (PCRF), which is an important part of the PCC architecture. A functional entity that controls the acquisition, assembly, and delivery of policies and accounting rules.
  • PCEF Policy and Charging Enforcement Function
  • the Policy and Charging Enforcement Function (PCEF) is a specific policy and charging enforcement point, usually located in the gateway function. In the SAE network, the PCEF function is located in the PDN GW, where the PCRF is connected to the P-GW (PCEF) through G.
  • the IMS emergency call part includes: a Home Subscriber Server (HSS), which is mainly used for management. The subscriber's subscription data is located in the home network.
  • HSS Home Subscriber Server
  • CSCF Call Session Control Function
  • P-CSCF Proxy Call Session Control Function Entity
  • I-CSCF Query Call Session Control Functional entity
  • S-CSCF Serving Call Session Control Function Entity
  • Emergency-CSCF Emergency-CSCF
  • the E-CSCF is the session control center of the emergency call, and determines which public safety answer point (PNA) the emergency call should be routed to.
  • PNA public safety answer point
  • the E-CSCF is connected to the PSAP via Mi/Mg and connected to the P-CSCF via Mw.
  • the P-CSCF is connected to the PCRF through Rx and is connected to the UE through Gm.
  • the location service part includes: a location request function (Location Require Function, called LRF), which is a function entity that is defined in the emergency call architecture, provides the location of the user for the E-CSCF, and finds a suitable location based on the location. PSAP.
  • LRF Location Require Function
  • the Gateway Mobile Location Center (GLC) is the main function point for providing user location functions in the core network.
  • the LRF function is part of the GMLC.
  • GMLC is connected to E-CSCF through Ml, connected to PSAP through Mm, and connected to MME through Lg.
  • the UE is required to be able to initiate an emergency call even if it is restricted.
  • the case where the UE is restricted to the service includes the following:
  • the UE has a valid Universal Integrated Circuit Card (UICC) card. It is a legitimate IMS user. It has a legitimate user identity in the HSS, but there are certain service restrictions, such as: The roaming area is restricted to the service, the current arrears are not allowed to initiate a normal call, and the monthly service is restricted in a specific cell.
  • UICC Universal Integrated Circuit Card
  • the UE has a valid UICC card, but the International Mobie Subscriber Identity (IMSI) recorded on the card is invalid in the HSS. For example, the IMSI recorded on the card has been cancelled by the HSS due to long-term non-use.
  • IMSI International Mobie Subscriber Identity
  • the UE does not have a valid UICC card, and of course there is no IMSI.
  • the emergency call in the emergency call, it is called a restricted mode.
  • a restricted mode ie, the UE is in a restricted state at this time
  • its normal network attachment, or service establishment request will be rejected by the network.
  • Emergency calls should ensure that restricted mode UEs are also supported by emergency calls. Therefore, 3GPP has carried out a series of technical improvements for restricted mode UEs in the research of the Evolved Packet System (Evolved Packet System), which supports the research of emergency calls. A typical improvement is to promote restrictions.
  • the mode UE is attached to the EPS network through an Emergency Attach and establishes an Emergency Bearer dedicated to emergency calls. For a UE in restricted mode, the following main steps are required to initiate an emergency call:
  • A Establishing an emergency bearer (default bearer):
  • the UE initiates an emergency attach, and the so-called emergency attach means that the UE carries the emergency identifier when initiating the normal attach, so that the bearer network is currently attached for the purpose of making an emergency call.
  • the bearer network receives the emergency attach request of the UE, and establishes a default bearer dedicated to the emergency call by using an emergency access point name (E-APN). This default bearer is mainly used. For signaling control.
  • (B) Emergency call (This procedure describes the process of establishing a bearer):
  • the UE initiates an emergency call, ie, by carrying an emergency identity in a normal INVITE message, indicating that the call request is an emergency call.
  • the UE fills in the emergency number in the called number. If the UE is in the visited place, the emergency number is the emergency number of the visited place; the emergency call is routed to the E-CSCF, and the E-CSCF queries the LRF for the address of the PSAP.
  • the LRF determines which PSAP to serve the UE by querying the location information of the UE. After obtaining the PSAP address, the E-CSCF routes the call to the PSAP.
  • Step 201 When the UE does not know that the UE is in the restricted area, the UE initiates a normal attach request to the eNodeB, and after receiving the normal attach request sent by the UE, the eNodeB selects an MME for the UE for the monthly service, and Forward to the MME.
  • Step 202 The MME sends a location update (Location Update) request message to the HSS of the home network, where the location update request message carries the identifier of the MME and the identifier of the UE, to inform the UE of the currently accessed area i or.
  • Step 203 The HSS searches for the user data of the UE according to the identifier of the UE, and sends the data to the MME.
  • the part of the user data of the UE may include: an access point name (Access Point Name, a cartridge called APN), a quality of service (Quality of Service), and the like; the following restriction information may be included: The cell or base station that is forbidden to access, or may be a specific cell or base station that can be accessed (the access is prohibited in other areas).
  • Step 204 The MME receives the user data, and returns a user data receiving response to the HSS.
  • step 206 If the UE needs to initiate an emergency call, an emergency attach procedure needs to be performed. That is, the emergency attach request is initiated to the MME, that is, the UE carries an emergency identifier during the attaching process, and the user is in an emergency attach state.
  • Step 208 The MME receives an emergency attach request from the UE, and finds that the user is in an emergency attach state, and the MME will allow the user to access the emergency service, and initiate a default bearer to the emergency APN.
  • the UE attaches to the SAE network and obtains a bearer dedicated to the emergency call, after which the UE can initiate an emergency call.
  • the UE needs to perform a normal attach before it can find that it is in a restricted state, cannot be in a normal attached state, and then initiates an emergency call to make an emergency call.
  • the present invention has been made in view of the problem that a restricted UE may cause an extended emergency call time and increase the signaling interaction between the UE and the network when the emergency attachment is attached.
  • the main object of the present invention is to provide a user equipment attachment processing. The program to solve at least one of the above problems.
  • a processing method of user equipment attachment includes: when the mobility management entity determines that the user equipment is in a restricted state, the mobility management entity sets the state of the user equipment to an emergency attachment state.
  • the method further includes: the mobility management entity initiates establishing a default bearer to the emergency service access point name.
  • the default management of the mobility management entity to establish the name of the emergency service access point includes: the mobility management entity initiates a default bearer request to the serving gateway; the service gateway receives the default bearer request, and forwards the default bearer request to the packet.
  • the Serving Gateway receives the setup default bearer response from the packet data network gateway and forwards the default bearer response to the mobility management entity.
  • the method further includes: the mobility management entity sending an attach response message to the user equipment, where the attach response message carries the device for notifying the user Notification information that is currently in an emergency attachment state.
  • the notification information includes one of the following: an emergency service access point name, and an emergency attachment indication.
  • the method further includes: the user equipment receiving the attach response message, and setting the self state to the emergency attach state.
  • a mobility management entity includes: a determining module, configured to determine whether a user equipment that initiates a normal attach request is in a restricted state; and a first setting module, configured to:
  • the first scheduling module is configured to schedule the first setting module to perform setting when the determining module determines that the user equipment is in the restricted state.
  • the mobility management entity further includes: an initiating module, configured to initiate a default bearer to establish an emergency service access point name.
  • the mobility management entity further includes: a sending module, configured to send an attach response message to the user equipment, where the attach response message carries notification information for notifying the user that the device is currently in an emergency attach state.
  • a user equipment is provided.
  • the user equipment according to the present invention includes: a receiving module, configured to receive an attach response message from the mobility management entity, where the attach response message carries notification information for notifying the user that the device is currently in an emergency attach state;
  • the second setting module is configured to schedule the second setting module to perform setting when the receiving module receives the attach response message.
  • a method for setting the state of the MME UE to the emergency attach state when the MME determines that the UE is in the restricted state solves the problem that the restricted UE may cause the extended emergency call when the emergency attaches, and increase the UE and The problem of signaling interaction of the network, thereby shortening the time of emergency calls and reducing the signaling interaction between the UE and the network.
  • FIG. 1 is a schematic diagram of a UE performing an emergency service by accessing an SAE network according to the related art
  • FIG. 2 is a flowchart of a restricted UE attaching to an SAE network according to the related art
  • FIG. 3 is a flowchart according to the present invention.
  • FIG. 4 is a structural block diagram of an MME according to an embodiment of the present invention
  • FIG. 5 is a block diagram of a preferred structure of an MME according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a UE according to an embodiment of the present invention.
  • the embodiments of the present invention provide a processing scheme for attaching a user equipment, in which the problem of the extended UE is caused by the restricted UE in the case of the emergency attachment, and the problem of the signaling interaction between the UE and the network is increased.
  • the network In the normal attach procedure initiated by the UE in the restricted state (the network determines, but the UE does not know it yet), the network notifies the UE that the UE is in the emergency attach state.
  • the MME When the MME determines that the UE is in the restricted state, the MME will The state is set to the emergency attach state, and the default load to the emergency APN is initiated. The MME notifies the UE that the UE is in the emergency attach state in the attach response message. After receiving the attach response message, the UE sets the state to the emergency attach state. Reduce the time of emergency calls and reduce the signaling interaction between the UE and the network.
  • a method for processing a UE attaching is applied to a process in which a UE initiates a normal attach request, where the method includes: when the MME determines that the UE is in a restricted state, the MME sets the state of the UE. Set to emergency attachment status. Further, the MME initiates establishment of a default bearer to the name of the emergency service access point. Specifically, the MME initiates a default request to the S-GW, the S-GW receives the request, and forwards the default bearer request to the P-GW; the S-GW receives the setup default bearer response from the P-GW, and Establish a default response to the MME.
  • the MME sends an attach response message to the UE, where the attach response message carries the notification information for notifying that the UE is currently in an emergency attach state.
  • the notification information herein may include one of the following: an emergency service access point name (emergency APN), an emergency attachment indication.
  • the UE receives the attach response message and sets its own state to an emergency attach state.
  • Step 301 The UE sends a normal attach request to the EPS network, and the normal attach request is delivered to the MME.
  • Step 302 After receiving the normal attach request sent by the UE, the MME initiates a location update request to the HSS.
  • Step 303 After receiving the location update request sent by the MME, the HSS provides the user data of the UE to the MME, that is, sends a message inserting the user data to the MME.
  • Step 304 After receiving the user data sent by the HSS, the MME sends a user data response message to the HSS.
  • Step 305 After receiving the user data reception response message sent by the MME, the HSS sends a location update response message to the MME.
  • Step 306 After receiving the location update response message, the MME performs 4 ⁇ right according to the user data, and finds that the UE is in a restricted state (for example, the UE is in a restricted cell or arrears), and the MME sets the state of the UE. For emergency attach status, and initiate a default bearer to the emergency APN.
  • Step 307 The MME sends an attach response message to the UE, and notifies the UE that the UE is in an emergency attach state.
  • the method may be: sending an emergency APN to the UE, or sending an emergency attach indication to the UE. After receiving the attach response message, the UE sets its own state as emergency attach.
  • the steps shown in the flowchart of the accompanying drawings may be executed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein.
  • Apparatus Embodiments Embodiment 1 According to an embodiment of the present invention, an MME is provided.
  • FIG. 4 is a structural block diagram of an MME according to an embodiment of the present invention.
  • the MME includes: a determining module 42, a first setting module 44, and a first scheduling module 46.
  • the foregoing structure is described below.
  • the determining module 42 is configured to determine whether the UE that initiates the normal attach request is in a restricted state;
  • the first setting module 44 is configured to set the state of the UE to an emergency attach state;
  • the first scheduling module 46 is connected to the determining module 42 and the A setting module 44 is configured to schedule the first setting module 44 to perform setting when the determining module 42 determines that the UE is in the restricted state.
  • FIG. 5 is a block diagram showing a preferred structure of an MME according to an embodiment of the present invention. As shown in FIG. 5,
  • the MME further includes: an initiating module 52, configured to initiate a default bearer to establish an emergency service access point name, and a sending module 54, configured to send an attach response message to the UE, where the attach response message carries a notification that the UE is currently in an emergency attach Status notification information.
  • an initiating module 52 configured to initiate a default bearer to establish an emergency service access point name
  • a sending module 54 configured to send an attach response message to the UE, where the attach response message carries a notification that the UE is currently in an emergency attach Status notification information.
  • FIG. 6 is a structural block diagram of a UE according to an embodiment of the present invention. As shown in FIG. 6, the UE includes: a receiving module 62, a second setting module 64, and a second scheduling module 66. The foregoing structure is described below.
  • the module 62 is configured to: connect an attach response message from the MME, where the attach response message carries notification information for notifying that the UE is currently in an emergency attach state; and the second setting module 64 is configured to set the UE's own state.
  • the second scheduling module 66 is connected to the receiving module 62 and the second setting module 64, and is configured to schedule the second setting module 64 to perform setting when the receiving module 62 receives the attach response message.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.

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  • Computer Networks & Wireless Communication (AREA)
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Description

用户设备附着的处理方法、 移动性管理实体
以及用户设备
技术领域 本发明涉及通信领域, 具体而言, 涉及一种用户设备附着的处理方法、 移动性管理实体以及用户设备。 背景技术 互联网十办议( Internet Protocol,筒称为 IP )的多媒体子系统( IP Multimedia Core Network Subsystem, 筒称为 IMS )是新一代通信网络的核心, IMS的特 点是采用了会话发起协议 ( Session Initiation Protocol, 筒称为 SIP )体系, 通 信与接入无关, 可以具备多种媒体业务控制功能与承载能力分离, 呼叫与会 话分离, 应用与服务分离, 业务与网络分离, 以及移动网与英特网业务融合 等多种能力, IMS的提出符合通信网融合发展的趋势。 由于 IMS和接入无关的特点 , IMS下的紧急业务( Emergency Call , 筒 称为 EMC ), 可以建设在通用无线分组业务 ( General Packet Radio Service, 筒称为 GPRS ) 网络、 系统架构演进( System Architecture Evolution, 筒称为 SAE ) 网络上, 提供统一的紧急呼叫控制。 图 1是才艮据相关技术的用户设备 ( User Equipment, 筒称为 UE ) 通过 接入 SAE网络执行紧急业务的示意图, 如图 1所示, 其中的实线表示信令, 虚线表示用户的 IP通道, 图 1描述了在 SAE接入下 , IMS的紧急呼叫所涉 及到主要网元。 其中的网元包括: SAE 网络部分的网元, 用以提供底层的承载管理和 移动性管理。 策略计费控制 (Policy Charging Control, 筒称为 PCC ) 部分的 网元, 用以在底层 ^lc载层和上层业务层建立有效的策略、 计费控制。 位置月 务( Location Service, 筒称为 LCS ) 的部分的网元, 用以为紧急呼叫提供位 置服务和公共安全接入点( Public Safety Access Point , 筒称为 PSAP )的地址。 IMS紧急业务的部分, 用以控制和处理紧急呼叫的会话。 其中, SAE部分的网元主要有: 增强型的无线基站( eNodeB ) , 是下一代的无线接入网的主要空口资源 的控制设备, 可以提供更高的上下行速率, 更低的传输延迟和更加可靠的无 线传输。 移动性管理实体(Mobility Management Entity, 筒称为 MME ), 负责管 理和存储 UE上下文(例如 , UE/用户标识 , 移动性管理状态 , 用户安全参数 等), 为用户分配临时标识, 当 UE驻扎在该跟踪区域或者该网络时, 负责对 该用户进行鉴权。 其中, UE 通过长期演进 ( Long-Term Evolution, 筒称为 LTE ) -UU与 eNodeB相连, eNodeB通过 S1-MME与 MME相连。 SAE 网关 (Gateway, 筒称为 GW ), 是用户面功能实体, 用于用户面 数据路由处理, 分为服务网关 ( Serving Gateway, 筒称为 S-GW ) 和分组数 据网络网关 ( Packet Data Network Gateway , 筒称为 P-GW ) 两种 SAE GW。 S-GW 是 SAE 系统与传统第三代合作伙伴计划 ( The 3rd Generation Partnership Project, 筒称为 3GPP ) 系统间的移动 4苗点以及演进的通用地面无 线接入网 ( Evolved Universal Terrestrial Radio Access Network , 筒称为 E-UTRAN ) 之间的移动 4苗点。 P-GW 是 SAE 与分组数据网 (Packet Data Network, 筒称为 PDN ) 的边界网关, 负责 PDN的接入、 在 SAE与 PDN间 转发数据等功能。 S-GW通过 S1-U与 eNodeB相连, 通过 S5与 P-GW相连。 其中 , 策略和计费控制 ( Policy and Charging Control , 筒称为 PCC )部 分包括: 策略和计费规贝 'J功肯 ¾ ( Policy and Charging Rules Function , 筒称为 PCRF ), 是 PCC架构的重要功能实体, 用以控制策略和计费规则的获取、 装 配、 下发等。 策略和计费执行功能 ( Policy and Charging Enforcement Function , 筒称 为 PCEF ), 是具体的策略和计费的执行点, 通常位于网关功能中。 在 SAE 网络中, PCEF功能位于 PDN GW中, 其中 PCRF通过 G 与 P-GW ( PCEF ) 相连。 其中, IMS紧急呼叫部分包括: 归属用户服务器 (Home Subscriber Server, 筒称为 HSS ), 主要管理用 户的签约数据, 位于归属网。 呼叫会话控制功能 ( Call Session Control Function, 筒称为 CSCF ), 是 控制会话过程的核心网元, 包括: 代理呼叫会话控制功能实体( Proxy-CSCF , 筒称为 P-CSCF )、 查询呼叫会话控制功能实体( Interrogating-CSCF , 筒称为 I-CSCF )、 服务呼叫会话控制功能实体 ( Serving-CSCF , 筒称为 S-CSCF )、 紧急呼叫会话控制功能实体 (Emergency-CSCF , 筒称为 E-CSCF )。 其中, E-CSCF 为紧急呼叫的会话控制中心, 决定紧急呼叫应该路由到哪个公共安 全应答点 ( Public Safety Answer Point, 筒称为 PSAP )。 E-CSCF通过 Mi/Mg 与 PSAP相连, 通过 Mw与 P-CSCF相连。 P-CSCF通过 Rx与 PCRF相连, 通过 Gm与 UE相连。 其中, 位置服务部分包括: 位置请求功能 (Location Require Function, 筒称为 LRF ), 是一个還辑 功能实体, 定义在紧急呼叫架构中 , 为 E-CSCF提供用户的位置 , 以及基于 该位置查找合适的 PSAP。 网关移动定位中心 (Gateway Mobile Location Center, 筒称为 GMLC ),是核心网中提供用户定位功能的主要功能点。通常, LRF功能属于 GMLC的一部分。 其中, GMLC ( LRF ) 通过 Ml与 E-CSCF 相连, 通过 Mm与 PSAP相连, 通过 Lg与 MME相连。 在现有紧急呼叫的处理过程中 ,要求 UE即使是在被限制服务的情况下 , 也应该能够发起紧急呼叫。 其中, UE被限制服务的情况包括以下几种:
( 1 ) UE 具有有效的普遍集成电路卡片 (Universal Integrated Circuit Card, 筒称为 UICC )卡, 是一个合法的 IMS用户 , 在 HSS中具备合法的用 户身份, 但是存在一定的服务限制, 例如: 在漫游地被限制服务、 当前欠费 不允许发起正常呼叫、 在特定的小区内被限制月 务等。 ( 2 ) UE具备有效的 UICC卡 , 但是该卡上所记录的国际移动用户识别 码 ( International Mobie Subscriber Identity, 筒称为 IMSI ), 在 HSS中是无效 的。 例如 , 该卡上所记录的 IMSI , 已经由于长期不使用被 HSS注销了。
( 3 ) UE不具备有效的 UICC卡 , 当然也不存在 IMSI。
以上 UE所处的被限制服务的情况,在紧急呼叫中 ,称之为受限制模式。 对于受限制模式下的 UE (即, 此时 UE处于受限状态), 其发起的正常网络 附着、 或业务建立请求, 将会被网络所拒绝。 而紧急呼叫应该能保证受限制 模式的 UE也能够得到紧急呼叫的支持。 因此, 3GPP在研究的演进的分组域 系统( Evolved Packet System , 筒称为 EPS )对紧急呼叫的支持中 , 针对受限 制模式的 UE进行了一系列的技术改进, 一个典型的改进就是促使受限制模 式的 UE通过紧急附着 (Emergency Attach ) 附着到 EPS网络, 并建立专门 用于紧急呼叫的紧急 载 ( Emergency Bearer )。 对于一个受限制模式下的 UE, 发起紧急呼叫需要执行如下主要步骤:
( A ) 建立紧急承载 (默认承载): UE发起紧急附着 , 所谓紧急附着 , 是指 UE在发起普通附着时, 携带紧急标识, 以告知承载网当前附着是为了 拨打紧急电话。 承载网络接收到 UE的紧急附着请求, 通过一个紧急接入点 名称 ( Emergency Access Point Name, 筒称为 E-APN ), 来建立一个专门用于 紧急呼叫的缺省承载 , 这个缺省承载主要用于信令控制。
( B ) 紧急呼叫 (该过程描述的是建立指明承载的过程): UE发起紧急 呼叫, 即, 通过在一个正常的请求(INVITE ) 消息中携带紧急标识, 表明这 个呼叫请求是一个紧急呼叫。 UE在被叫号码中填写紧急号码, 如果 UE在拜 访地, 则该紧急号码是拜访地的紧急号码; 紧急呼叫被路由到 E-CSCF , E-CSCF通过向 LRF查询 PSAP的地址。 LRF通过查询 UE的位置信息来决 定为 UE服务的 PSAP是哪个。 E-CSCF在获得了 PSAP地址后, 即将呼叫路 由给 PSAP。 图 2是根据相关技术的受限 UE附着到 SAE网络的流程图 , 如图 2所 示, 描述了一个处于受限区域的 UE发起紧急呼叫的流程, 该流程包括步骤 201至步骤駕。 步骤 201 , 当 UE不知道自己处于受限区域时, UE向 eNodeB发起正常 附着请求, eNodeB接收到 UE发送的正常附着请求后, 为 UE选择一个为之 月 务的 MME, 并^)夺附着请求转发到该 MME。 步骤 202, MME向归属网的 HSS发送位置更新 ( Location Update ) 请 求消息, 该位置更新请求消息中携带有 MME的标识和 UE的标识, 以告知 UE当前所接入的区 i或。 步骤 203 , HSS才艮据 UE的标识查找出 UE的用户数据, 发送给 MME。 UE的该部分用户数据可以包括: 接入点名称 ( Access Point Name, 筒称为 APN )、 签约服务质量 (Quality of Service, 筒称为 QoS ) 等信息; 还可以包 括如下限制信息: 可以是特定的禁止接入的小区或基站, 或者, 可以是特定 的可以接入的小区或基站 (其他区域禁止接入) 等。 步骤 204 , MME接收到用户数据 , 向 HSS返回用户数据接收响应。 步骤 205 , HSS接收到 MME发送的接收用户数据响应后 , 向 MME发 送位置更新响应。 步骤 206, MME检查 UE是否被允许接入到网络; jt匕时 MME发现 UE 在当前位置区域被限制接入或被限制呼叫, 则拒绝 UE的附着请求, 即, 向 UE发送附着拒绝消息, 并发送相应的错误给 UE, 指示 UE: 区域受限。 此 时 UE的接入失败。 需要说明的是, 步骤 206也可以在步骤 203之后执行。 步骤 207, 如果 UE需要发起紧急呼叫, 需要执行紧急附着流程。 即, 向 MME发起紧急附着请求, 就是 UE在附着过程中, 携带了一个紧急标识, 此时, 该用户处于紧急附着状态。 步骤 208 , MME接收来自 UE的紧急附着请求 , 发现该用户为紧急附 着状态, MME将允许该用户接入紧急业务, 并且发起建立一个到 emergency APN的默认承载。 在图 2所示的流程完成之后, UE即附着到 SAE网络, 并且获得了一个 专门用于紧急呼叫的承载, 此后, UE可以发起紧急呼叫。 从以上描述可以看出: UE需要先进行一个正常附着才能发现自己处于 受限状态, 不能处于正常附着状态, 之后通过发起紧急附着, 使得自己处于 紧急附着状态, 进行紧急呼叫。 该过程中存在两个附着流程, 使得 UE接入 网络进行紧急呼叫的时间延长, 增加了终端和网络的信令交互。 针对相关技术中受限 UE在紧急附着时会导致延长紧急呼叫的时间、增 加 UE和网络的信令交互的问题, 目前尚未提出有效的解决方案。 发明内容 针对受限 UE在紧急附着时会导致延长紧急呼叫的时间、 增加 UE和网 络的信令交互的问题而提出本发明 , 为此, 本发明的主要目的在于提供一种 用户设备附着的处理方案, 以解决上述问题至少之一。 为了实现上述目的 , 根据本发明的一个方面, 提供了一种用户设备附着 的处理方法。 根据本发明的用户设备附着的处理方法包括: 当移动性管理实体确定用 户设备处于受限状态时, 移动性管理实体将用户设备的状态设置为紧急附着 状态。 优选地, 在移动性管理实体将用户设备的状态设置为紧急附着状态时, 上述方法还包括: 移动性管理实体发起建立到紧急业务接入点名称的默认承 载。 其中, 移动性管理实体发起建立到紧急业务接入点名称的默认承载包 括: 移动性管理实体向服务网关发起建立默认承载请求; 服务网关接收建立 默认承载请求, 并将建立默认承载请求转发给分组数据网络网关; 服务网关 接收来自分组数据网络网关的建立默认承载响应 , 并将建立默认承载响应转 发给移动性管理实体。 优选地,在移动性管理实体发起建立到紧急业务接入点名称的默认承载 之后, 上述方法还包括: 移动性管理实体向用户设备发送附着响应消息, 其 中, 附着响应消息携带有用于通知用户设备当前处于紧急附着状态的通知信 息。 其中, 通知信息包括以下之一: 紧急业务接入点名称、 紧急附着指示。 优选地, 在移动性管理实体向用户设备发送附着响应消息之后, 上述方 法还包括: 用户设备接收附着响应消息, 并设置自身状态为紧急附着状态。 为了实现上述目的, 才艮据本发明的另一方面, 提供了一种移动性管理实 体。 根据本发明的移动性管理实体包括: 确定模块, 用于确定发起正常附着 请求的用户设备是否处于受限状态; 第一设置模块, 用于将用户设备的状态 设置为紧急附着状态; 第一调度模块, 用于在确定模块确定用户设备处于受 限状态时, 调度第一设置模块进行设置。 优选地, 上述移动性管理实体还包括: 发起模块, 用于发起建立到紧急 业务接入点名称的默认承载。 优选地, 上述移动性管理实体还包括: 发送模块, 用于向用户设备发送 附着响应消息, 其中, 附着响应消息携带有用于通知用户设备当前处于紧急 附着状态的通知信息。 为了实现上述目的, 根据本发明的再一方面, 提供了一种用户设备。 根据本发明的用户设备包括: 接收模块 , 用于接收来自移动性管理实体 的附着响应消息, 其中, 附着响应消息携带有用于通知用户设备当前处于紧 急附着状态的通知信息; 第二设置模块, 用于设置用户设备的自身状态为紧 急附着; 第二调度模块, 用于在接收模块接收到附着响应消息时, 调度第二 设置模块进行设置。 通过本发明, 采用当 MME确定 UE处于受限^!犬态时, MME UE的 状态设置为紧急附着状态的方法, 解决了受限 UE在紧急附着时会导致延长 紧急呼叫的时间、 增加 UE和网络的信令交互的问题, 进而缩短了紧急呼叫 的时间、 减少了 UE和网络的信令交互。 附图说明 此处所说明的附图用来提供对本发明的进一步理解 ,构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是根据相关技术的 UE通过接入 SAE网络执行紧急业务的示意图; 图 2是根据相关技术的受限 UE附着到 SAE网络的流程图; 图 3是才艮据本发明实施例的 UE发起的正常附着流程中, 网络通知 UE 处于紧急附着状态的流程图; 图 4是根据本发明实施例的 MME的结构框图; 图 5是根据本发明实施例的 MME的优选结构框图; 图 6是根据本发明实施例的 UE的结构框图。 具体实施方式 功能相克述 考虑到受限 UE在紧急附着时会导致延长紧急呼叫的时间、 增加 UE和 网络的信令交互的问题,本发明实施例提供了一种用户设备附着的处理方案 , 在受限状态下 (网络决定, 但 UE 自己还不知道) 的 UE发起的正常附着流 程中 , 网络通知 UE处于紧急附着状态的处理过程中 , 当 MME确定 UE处 于受限状态时, MME将 UE的状态设置为紧急附着状态, 并且发起建立一个 到 emergency APN的默认 载; MME在附着响应消息中通知 UE当前处于 紧急附着状态; UE接收到附着响应消息后 , 设置自身状态为紧急附着状态 , 这样可以缩短紧急呼叫的时间, 并减少 UE和网络的信令交互。 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特 征可以相互组合。 下面将参考附图并结合实施例来详细说明本发明。 方法实施例 根据本发明的实施例, 提供了一种 UE附着的处理方法, 应用于 UE发 起正常附着请求的过程, 该方法包括: 当 MME确定 UE处于受限^ 态时, MME将 UE的状态设置为紧急附着状态。 进一步地 , MME发起建立到紧急业务接入点名称的默认承载。具体地 , MME向 S-GW发起建立默认 ^l载请求, S-GW接收请求, 并将建立默认 载请求转发给 P-GW; S-GW接收来自 P-GW的建立默认承载响应, 并将建 立默认 ^l载响应转发给 MME。 jt匕后 , MME向 UE发送附着响应消息, 其中, 该附着响应消息携带有 用于通知 UE当前处于紧急附着状态的通知信息。 其中, 这里的通知信息可 以包括以下之一: 紧急业务接入点名称 ( emergency APN )、 紧急附着指示。 然后, UE接收该附着响应消息, 并设置自身状态为紧急附着状态。 下面将结合实例对本发明实施例的实现过程进行详细描述。在以下场景 中, UE不知道处于受限区域, 发起正常的附着后, 需要拨打紧急电话。 图 3是才艮据本发明实施例的 UE发起的正常附着流程中, 网络通知 UE 处于紧急附着状态的流程图, 如图 3所示, 该方法包括如下的步骤 301至步 骤 307: 步骤 301 , UE向 EPS网络发送正常附着请求, 该正常附着请求传递到 MME。 步骤 302, MME接收到 UE发送的正常附着请求后 , 向 HSS发起位置 更新请求。 步骤 303 , HSS接收到 MME发送的位置更新请求后, 向 MME提供 UE的用户数据, 即, 向 MME发送插入用户数据的消息。 步骤 304, MME接收到 HSS发送的用户数据后 , 向 HSS发送用户数据 接^:响应消息。 步骤 305 , HSS接收到 MME发送的用户数据接收响应消息后 ,向 MME 发送位置更新响应消息。 步骤 306 , MME接收到位置更新响应消息后, 根据用户数据对 UE进 行 4吏权, 发现该 UE处于受限状态 (例如, 该 UE处于受限小区或者欠费), MME将该 UE的状态设置为紧急附着状态, 并且发起建立一个到 emergency APN的默认承载。 步骤 307, MME向该 UE发送附着响应消息, 并在其中通知 UE当前处 于紧急附着状态, 通知的方法可以是: 将 emergency APN发送给 UE, 或者 发送紧急附着指示给 UE。 UE接收到附着响应消息后, 设置自身状态为紧急 附着。 通过上述实施例, 当 UE发起紧急呼叫时,可以直接发起建立指明承载, 而不需要发起紧急附着流程。 需要说明的是,在附图的流程图示出的步骤可以在诸如一组计算机可执 行指令的计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是 在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤。 装置实施例 实施例一 根据本发明的实施例, 提供了一种 MME。 图 4是根据本发明实施例的 MME的结构框图 , 如图 4所示, 该 MME包括: 确定模块 42、 第一设置模 块 44、 第一调度模块 46, 下面对上述结构进行描述。 确定模块 42 , 用于确定发起正常附着请求的 UE是否处于受限状态; 第 一设置模块 44, 用于将 UE的状态设置为紧急附着状态; 第一调度模块 46, 连接至确定模块 42和第一设置模块 44 , 用于在确定模块 42确定 UE处于受 限状态时, 调度第一设置模块 44进行设置。 图 5是才艮据本发明实施例的 MME的优选结构框图, 如图 5所示, 该
MME还包括: 发起模块 52 , 用于发起建立到紧急业务接入点名称的默认承 载; 发送模块 54, 用于向 UE发送附着响应消息, 其中, 附着响应消息携带 有用于通知 UE当前处于紧急附着状态的通知信息。 实施例二 居本发明的实施例,提供了一种 UE。 图 6是 居本发明实施例的 UE 的结构框图, 如图 6所示, 该 UE包括: 接收模块 62、 第二设置模块 64、 第 二调度模块 66, 下面对上述结构进行描述。 接^:模块 62 , 用于接^:来自 MME的附着响应消息, 其中, 附着响应 消息携带有用于通知 UE当前处于紧急附着状态的通知信息; 第二设置模块 64, 用于设置 UE的自身状态为紧急附着; 第二调度模块 66, 连接至接收模 块 62和第二设置模块 64, 用于在接收模块 62接收到附着响应消息时, 调度 第二设置模块 64进行设置。 综上所述, 通过本发明的上述实施例 , 采用当 MME确定 UE处于受限 状态时, MME将 UE的状态设置为紧急附着状态的方法, 解决了受限 UE在 紧急附着时会导致延长紧急呼叫的时间、增加 UE和网络的信令交互的问题, 避免了相关技术中存在两个附着过程, 加快 UE接入网络进行紧急呼叫的速 度, 减少了 UE和网络的信令交互。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或 者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软 件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的^^申和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种用户设备附着的处理方法, 其特征在于, 包括:
当移动性管理实体确定所述用户设备处于受限状态时,所述移动性 管理实体将所述用户设备的状态设置为紧急附着状态。
2. 根据权利要求 1所述的方法, 其特征在于, 在所述移动性管理实体将所 述用户设备的状态设置为所述紧急附着状态时, 所述方法还包括:
所述移动性管理实体发起建立到紧急业务接入点名称的默认承载。
3. 才艮据权利要求 2所述的方法, 其特征在于, 所述移动性管理实体发起建 立到紧急业务接入点名称的默认承载包括:
所述移动性管理实体向服务网关发起建立默认承载请求; 所述服务网关接收所述建立默认承载请求,并将所述建立默认承载 请求转发给分组数据网络网关;
所述服务网关接收来自所述分组数据网络网关的建立默认承载响 应, 并将所述建立默认承载响应转发给所述移动性管理实体。
4. 根据权利要求 2所述的方法, 其特征在于, 在所述移动性管理实体发起 建立到紧急业务接入点名称的默认承载之后, 所述方法还包括:
所述移动性管理实体向所述用户设备发送附着响应消息, 其中, 所 述附着响应消息携带有用于通知所述用户设备当前处于紧急附着状态的 通知信息。
5. 根据权利要求 4所述的方法, 其特征在于, 所述通知信息包括以下之一: 紧急业务接入点名称、 紧急附着指示。
6. 根据权利要求 4所述的方法, 其特征在于, 在所述移动性管理实体向所 述用户设备发送附着响应消息之后, 所述方法还包括:
所述用户设备接收所述附着响应消息 ,并设置自身状态为紧急附着 状态。
7. 一种移动性管理实体, 其特征在于, 包括:
确定模块,用于确定发起正常附着请求的用户设备是否处于受限状 态;
第一设置模块, 用于将所述用户设备的状态设置为紧急附着状态; 第一调度模块,用于在所述确定模块确定所述用户设备处于受限状 态时, 调度所述第一设置模块进行设置。
8. 根据权利要求 7所述的移动性管理实体, 其特征在于, 还包括:
发起模块, 用于发起建立到紧急业务接入点名称的默认承载。
9. 根据权利要求 8所述的移动性管理实体, 其特征在于, 还包括:
发送模块, 用于向所述用户设备发送附着响应消息, 其中, 所述附 着响应消息携带有用于通知所述用户设备当前处于紧急附着状态的通知 信息。
10. 一种用户设备, 其特征在于, 包括:
接收模块 , 用于接收来自移动性管理实体的附着响应消息, 其中, 所述附着响应消息携带有用于通知用户设备当前处于紧急附着状态的通 知信息;
第二设置模块, 用于设置用户设备的自身状态为紧急附着; 第二调度模块 , 用于在所述接收模块接收到所述附着响应消息时 , 调度所述第二设置模块进行设置。
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