WO2012000359A1

WO2012000359A1 - Method, device and system for selecting public safety answer point

Info

Publication number: WO2012000359A1
Application number: PCT/CN2011/074773
Authority: WO
Inventors: 李勉; 李世涛
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-29
Filing date: 2011-05-27
Publication date: 2012-01-05
Also published as: CN102316077A; CN102316077B

Abstract

A method, a device and a system for selecting public safety answer point are disclosed in the present invention. The method includes: an E-CSCF receives an emergency service request message for indicating that a UE initiates emergency service (S302); according to the emergency service request message, the E-CSCF judges whether the type of emergency service is non-voice emergency service or not (S304); if the result of judgment is right, the E-CSCF selects a PSAP for the UE, which supports the non-voice emergency service, based on the position information and the non-voice emergency service type of the UE (S306). The invention ensures that the PSAP supporting the non-voice emergency service can be selected, and the service corresponding to the non-voice emergency service is provided for the UE.

Description

^^共安全应答点的选择方法、装置及*** 技术领域本发明涉及通信领域，具体而言，涉及一种公共安全应答点（Public Safety Answer Point, 简称为 PSAP ) 的选择方法、装置及***。背景技术 TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method, device, and system for selecting a Public Safety Answer Point (PSAP). Background technique

IP多媒体子*** ( IP Multimedia Subsystem, 简称为 IMS ) 是新一代通信网络的核心，其显著特点是釆用了会话发起协议（ Session Initiation Protocol, 简称为 SIP ) 体系，通信与接入无关，且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功能。由于 IMS与接入无关的特点， IMS下的紧急会话（ Emergency Call , 简称为 EMC ) 业务，可以建设在通用无线分组业务（General Packet Radio Service, 简称为 GPRS ) 网络和***长期演进 ( System Architecture Evolution, 简称为 SAE ) 网络上，提供统一的紧急会话控制。图 1为才艮据^!关技术的用户设备 ( User Equipment, 简称为 UE )接入网络实现 IMS紧急会话的***架构的示意图。图 1中， IMS紧急业务部分用以控制和处理紧急会话的会话，该部分的网元主要包括：归属用户服务器（Home Subscriber Server, 简称为 HSS )、呼叫会话控制功能（Call Session Control Function, 简称为 CSCF )。 HSS主要管理用户的签约数据，位于归属网。 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（Proxy-Call Session Control Function , 简称为 P-CSCF ) 、查询呼叫会话控制功能 ( Interrogating-CSCF,简称为 I-CSCF )、服务呼叫会话控制功能（ Serving-CSCF, 简称为 S-CSCF )、紧急呼叫会话控制功能 ( Emergency Call Session Control Function, 简称为 E-CSCF )。其中， E-CSCF为紧急会话的会话控制中心，其决定紧急会话路由到哪个 PS AP。在现有技术下， UE通过 GPRS/演进的分组域***（ Evolved Packet System, 简称为 EPS )发起 IMS紧急会话的过程，经历了接入网络、建立承载并获取 IP 地址、发现 P-CSCF、发起紧急会话、紧急会话被路由到 PSAP并处理的一系列过程。图 2为根据相关技术的 UE在发起 IMS紧急会话， ***分配 PSAP并处理紧急会话的流程图，包括如下的步骤 S202至步骤 S212。步骤 S202 , UE 发起紧急会话请求，紧急会话请求被 P-CSCF 路由到 E-CSCF。步骤 S204, E-CSCF接收到来自 UE的紧急会话请求后，向 LRF发起位置查询请求，查询 UE的位置信息，并要求 LRF分配合适的 PSAP。步骤 S206, LRF从位置服务功能实体 (比如 LCS ) 查询 UE的位置信息，并且， LRF根据所获得的 UE的位置信息、按位置从所配置的 PSAP中选择一个合适的 PSAP。步骤 S208, LRF向 E-CSCF返回位置查询响应，携带 UE的当前位置信息，以及根据位置选择的 PSAP。步骤 S210 , E-CSCF将紧急会话请求路由给该 PSAP。步骤 S212, 后续 PSAP和 UE间完成紧急会话过程。在上述步骤 S204中，如果 E-CSCF收到的 UE紧急会话请求中携带的位置信息可信且足够，能正确地选择 PSAP, 则 E-CSCF直接根据 UE的位置信息为 UE选择对应的 PSAP, 而不需要与 LRF交互，即步骤 S204到步骤 S208不执行。通常，在网络中会存在多个 PSAP, 每个 PSAP均有其管辖的范围，对应于特定的位置区域范围。在图 2中， LRF根据 UE的当前位置信息来选择合适的 PSAP。当 UE发生移动时，可能在下次发起紧急会话时，会选择到不同的 PSAP上去。由于紧急会话并不仅仅局限于语音呼叫，在一些特殊的情况下（比如聋哑人），紧急会话可以通过短信业务、 IMS消息业务来进行，在其他一些情况下，比如紧急呼叫中心需要报警人提供更多发生地的信息，还可以要求报警人提供视频或图片等媒体信息，这些都称为非语音紧急业务。而这种支持非语音紧急业务的 PSAP的部署有两种可能性：一种是在现有的 PSAP上同时实现支持语音和非语音的紧急业务，一种是单独部署专门为非语音紧急业务服务的 PSAP。对于前一种情况，由于这种部署都是逐步进行的，所以在前期会出现某些 PSAP 不支持非语音紧急业务；对于后一种情况，仅有单独部署的 PSAP支持非语音紧急业务，还有一些 PSAP并不支持非语音紧急业务。因此， E-CSCF根据 UE的位置信息为其选择 PSAP,会导致选择到的 PSAP 可能不支持非语音紧急业务，从而无法为用户提供非语音紧急业务相应的服务。发明内容针对相关技术中 E-CSCF仅仅根据 UE的位置信息为其选择 PSAP会导致发起非语音紧急业务的 UE无法选择到支持非语音紧急业务的 PSAP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 PSAP的选择方法、装置及***，以解决上述问题。为了实现上述目的，根据本发明的一个方面，提供了一种 PSAP的选择方法。根据本发明的 PSAP的选择方法包括： E-CSCF接收到用于指示 UE发起紧急业务的紧急业务请求消息； E-CSCF 才艮据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务；如果判断结果为是， E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP。 The IP Multimedia Subsystem (IMS) is the core of the new generation communication network. Its distinctive feature is the use of the Session Initiation Protocol (SIP) system. Communication and access are independent and have Multiple media service control functions are separated from bearer capabilities, call and session separation, application and service separation, service and network separation, and convergence of mobile and Internet services. Due to the fact that IMS is independent of access, the Emergency Call (EMC) service under IMS can be built into the General Packet Radio Service (GPRS) network and system long-term evolution (System Architecture Evolution). , referred to as SAE), provides unified emergency session control on the network. FIG. 1 is a schematic diagram of a system architecture for accessing a network to implement an IMS emergency session according to a user equipment (User Equipment, UE for short). In Figure 1, the IMS emergency service part is used to control and process the session of the emergency session. The network elements of the part mainly include: a Home Subscriber Server (HSS) and a Call Session Control Function (Call Session Control Function). For CSCF). The HSS mainly manages the user's subscription data and is located in the home network. The CSCF is the core network element that controls the session process, including: Proxy-Call Session Control Function (P-CSCF for short), Interrogating-CSCF (I-CSCF for short), and service. The call session control function (Serving-CSCF, abbreviated as S-CSCF) and the emergency call session control function (E-CSCF for short). The E-CSCF is a session control center of an emergency session, which determines which PS AP the emergency session is routed to. In the prior art, the UE initiates an IMS emergency session through a GPRS/Evolved Packet System (EPS), and goes through the access network, establishes a bearer and obtains an IP address, discovers a P-CSCF, and initiates Emergency sessions, emergency sessions are routed to the PSAP and processed through a series of processes. FIG. 2 is a flowchart of a method for a UE to initiate an IMS emergency session, the system allocates a PSAP, and processes an emergency session according to the related art, and includes the following steps S202 to S212. Step S202: The UE initiates an emergency session request, and the emergency session request is routed by the P-CSCF to the E-CSCF. Step S204: After receiving the emergency session request from the UE, the E-CSCF initiates a location query request to the LRF, queries the location information of the UE, and requests the LRF to allocate an appropriate PSAP. Step S206, the LRF queries the location information of the UE from the location service function entity (such as the LCS), and the LRF selects an appropriate PSAP from the configured PSAPs according to the obtained location information of the UE. Step S208, the LRF returns a location query response to the E-CSCF, carrying the current location information of the UE, and the PSAP selected according to the location. Step S210, the E-CSCF routes the emergency session request to the PSAP. Step S212, the emergency session process is completed between the subsequent PSAP and the UE. In the foregoing step S204, if the location information carried in the UE emergency session request received by the E-CSCF is reliable and sufficient, and the PSAP can be correctly selected, the E-CSCF directly selects the corresponding PSAP for the UE according to the location information of the UE. There is no need to interact with the LRF, that is, steps S204 through S208 are not performed. Typically, there will be multiple PSAPs in the network, each with a scope of its jurisdiction, corresponding to a specific range of location areas. In Figure 2, the LRF selects the appropriate PSAP based on the current location information of the UE. When the UE moves, it may choose to go to a different PSAP the next time an emergency session is initiated. Since the emergency session is not limited to voice calls, in some special cases (such as deaf people), emergency sessions can be performed through SMS service and IMS message service. In other cases, such as emergency call center, an alarm person is required. Providing more information about where it takes place, you can also ask the police to provide media information such as videos or pictures, which are called non-voice emergency services. The deployment of PSAPs that support non-voice emergency services has two possibilities: one is to implement both voice and non-voice emergency services on the existing PSAP, and the other is to separately deploy non-voice emergency services. PSAP. In the former case, since this deployment is carried out step by step, some PSAPs will appear in the early stage. Non-voice emergency services are not supported; in the latter case, only PSAPs that are deployed separately support non-voice emergency services, and some PSAPs do not support non-voice emergency services. Therefore, the E-CSCF selects the PSAP based on the location information of the UE, which may result in the selected PSAP may not support the non-voice emergency service, thereby failing to provide the user with the corresponding service of the non-voice emergency service. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that the E-CSCF selects a PSAP based on only the location information of the UE, which causes the UE that initiates the non-voice emergency service to fail to select the PSAP supporting the non-voice emergency service. The main purpose of the present invention is to provide a method, device and system for selecting a PSAP to solve the above problems. In order to achieve the above object, according to an aspect of the present invention, a method of selecting a PSAP is provided. The method for selecting a PSAP according to the present invention includes: the E-CSCF receives an emergency service request message for instructing the UE to initiate an emergency service; and the E-CSCF determines whether the type of the emergency service is a non-voice emergency service according to the emergency service request message. If the judgment result is yes, the E-CSCF selects a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE.

E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP 包括： E-CSCF才艮据紧急业务请求消息中携带的 UE的位置信息以及 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP。 The E-CSCF selects a PSAP for supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, including: the E-CSCF, the location information of the UE carried in the emergency service request message, and the UE The type of non-voice emergency service is that the UE selects a PSAP that supports non-voice emergency services.

E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP 包括： E-CSCF向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型；位置查询服务器根据紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型，确定支持非语音紧急业务的 PSAP的地址或路由信息，并发送 PSAP 的地址或路由信息； E-CSCF接收来自位置查询月艮务器 PSAP的地址或路由信息； E-CSCF根据地址或路由信息，为 UE选择支持非语音紧急业务的 PSAP。 The E-CSCF selects the PSAP for supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. The E-CSCF sends the location information of the UE carried in the emergency service request message to the location query server. The type of the non-voice emergency service of the UE; the location query server determines the address or routing information of the PSAP supporting the non-voice emergency service according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE, and sends the information The address or routing information of the PSAP; the E-CSCF receives the address or routing information from the location query server PSAP; the E-CSCF selects the PSAP supporting the non-voice emergency service for the UE according to the address or routing information.

E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP 包括： E-CSCF向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息；位置查询服务器根据紧急业务请求消息中携带的 UE的位置信息，确定 PSAP的列表，其中 PSAP的列表包括 PSAP的地址或路由信息以及 PSAP支持的紧急业务类型的能力，并发送 PSAP的列表； E-CSCF接收来自位置查询服务器的 PSAP的列表，并获取列表中的 PSAP的地址或路由信息以及 PSAP支持的紧急业务类型的能力； E-CSCF根据 UE的非语音紧急业务的类型、从列表中获取的地址或路由信息以及从列表中获取的 PSAP支持的紧急业务类型的能力，为 UE选择支持非语音紧急业务的 PSAP。 The E-CSCF selects a PSAP for supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, including: The E-CSCF sends the emergency service to the location query server. The location information of the UE carried in the request message; the location query server determines the list of PSAPs according to the location information of the UE carried in the emergency service request message, where the list of PSAPs includes the address or routing information of the PSAP and the emergency service type supported by the PSAP. Capabilities and send a list of PSAPs; the E-CSCF receives a list of PSAPs from the location query server and obtains the address or routing information of the PSAPs in the list and the capabilities of the emergency service types supported by the PSAP; the E-CSCF is based on the non-speech of the UE The type of emergency service, the address or routing information obtained from the list, and the ability of the emergency service type supported by the PSAP obtained from the list, select the PSAP supporting the non-voice emergency service for the UE.

E-CSCF 根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务包括以下之一： E-CSCF 根据紧急业务请求消息中是否携带用于指示紧急业务的类型为非语音紧急业务的标识，判断紧急业务的类型是否为非语音紧急业务，其中，标识包括以下之一：单独的会话发起协议 SIP头域，以参数形式携带在现有的 SIP头域； E-CSCF根据紧急业务请求消息中是否包括用于指示紧急业务的类型为非语音紧急业务的信息，判断紧急业务的类型是否为非语音紧急业务，其中，信息包括以下至少之一： SIP信令、会话描述协议 SDP信令、其他文体。在 E-CSCF接收到用于指示 UE发起紧急业务的紧急业务请求消息之前，还包括：代理呼叫会话控制功能 P-CSCF接收到来自 UE的紧急业务请求消息； P-CSCF根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务；如果判断结果为是， P-CSCF将紧急业务请求消息发送给 E-CSCF。为了实现上述目的，根据本发明的另一个方面，提供了一种 E-CSCF。才艮据本发明的 E-CSCF包括：接收装置，设置为接收用于指示用户设备 UE 发起紧急业务的紧急业务请求消息；判断装置，设置为根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务；选择装置，设置为在判断结果为是时，根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的公共安全应答点 PSAP。选择装置包括：第一选择模块，设置为根据紧急业务请求消息中携带的 UE的位置信息以及 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP。选择装置包括：第一发送模块，设置为向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型；第一接收模块，设置为接收来自位置查询服务器 PSAP的地址或路由信息；第二选择模块，设置为根据地址或路由信息，为 UE选择支持非语音紧急业务的 PSAP。选择装置包括：第二发送模块，设置为向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息；第二接收模块，设置为接收来自位置查询服务器的 PSAP的列表，其中列表包括 PSAP的地址或路由信息，以及 PSAP支持的紧急业务类型的能力；第三选择模块，设置为根据 UE的非语音紧急业务的类型、从列表中获取的地址或路由信息，以及 PSAP支持的紧急业务类型的能力为 UE选择支持非语音紧急业务的 PSAP。为了实现上述目的，根据本发明的另一个方面，还提供了一种位置查询服务器。根据本发明的位置查询服务器包括：第一确定模块，设置为根据紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型，确定支持非语音紧急业务的 PSAP的地址或路由信息；第一发送模块，设置为发送 PSAP 的地址或路由信息；第二确定模块，设置为根据紧急业务请求消息中携带的 UE的位置信息，确定 PSAP的列表，其中 PSAP的列表包括 PSAP的地址或路由信息以及 PSAP 支持的紧急业务类型的能力；第二发送模块，设置为发送 PSAP的歹' J表。为了实现上述目的，根据本发明的又一个方面，提供了一种 PSAP的选择 ***。才艮据本发明的 PSAP的选择***包括上述中任一项的 E-CSCF以及位置查询服务器。通过本发明，釆用 E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP, 解决了相关技术中 E-CSCF 仅仅根据 UE的位置信息为其选择 PSAP会导致发起非语音紧急业务的 UE无法选择到支持非语音紧急业务的 PSAP的问题，从而可以保证选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的服务。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为根据相关技术的 UE接入网络实现 IMS紧急会话的***架构的示意图；图 2为根据相关技术的 UE在发起 IMS紧急会话， ***分配 PSAP并处理紧急会话的流程图；图 3是才艮据本发明实施例的 PSAP的选择方法的流程图；图 4是才艮据本发明优选实施例一的交互流程图；图 5是居本发明优选实施例二的交互流程图；图 6是居本发明优选实施例三的交互流程图；图 7是才艮据本发明实施例的 E-CSCF的结构框图；图 8是根据本发明实施例的位置查询服务器的结构框图。具体实施方式需要说明的是，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。根据本发明的实施例，提供了一种 PSAP的选择方法。图 3是根据本发明实施例的 PSAP的选择方法的流程图，包括如下的步骤 S302至步骤 S306。步骤 S302, E-CSCF接收到用于指示 UE发起紧急业务的紧急业务请求消息。步骤 S304, E-CSCF根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务。步骤 S306, 如果判断结果为是， E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP。相关技术中， E-CSCF仅仅根据 UE的位置信息为其选择 PSAP, 会导致发起非语音紧急业务的 UE无法选择到支持非语音紧急业务的 PSAP。本发明实施例中， E-CSCF为 UE选择 PSAP考虑到了非语音紧急业务的类型，从而可以保证选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的月艮务。需要说明的是，如果紧急业务请求消息中携带的位置信息具体且可信，足够选择正确的 PSAP, 或网络中未部署位置查询服务器，本优选实施例中可以为位置请求功能（Location Require Function, 简称为 LRF ), 则 E-CSCF直接才艮据 UE的位置信息及判断出的紧急业务类型为 UE选择 PSAP。优选地， E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为The E-CSCF determines whether the type of the emergency service is a non-voice emergency service according to the emergency service request message. The E-CSCF includes an identifier for indicating that the emergency service is a non-voice emergency service according to the emergency service request message. And determining whether the type of the emergency service is a non-voice emergency service, where the identifier includes one of the following: a separate session initiation protocol SIP header field, carried in an existing SIP header field as a parameter; and the E-CSCF according to the emergency service request message Whether the information indicating the type of the emergency service is a non-voice emergency service, and determining whether the type of the emergency service is a non-voice emergency service, wherein the information includes at least one of the following: SIP signaling, session description protocol SDP signaling, Other styles. Before the E-CSCF receives the emergency service request message for instructing the UE to initiate the emergency service, the method further includes: the proxy call session control function P-CSCF receives the emergency service request message from the UE; and the P-CSCF according to the emergency service request message, It is determined whether the type of the emergency service is a non-voice emergency service; if the judgment result is yes, the P-CSCF sends an emergency service request message to the E-CSCF. In order to achieve the above object, according to another aspect of the present invention, an E-CSCF is provided. The E-CSCF according to the present invention includes: receiving means configured to receive an emergency service request message for instructing the user equipment UE to initiate an emergency service; and determining means configured to determine, according to the emergency service request message, whether the type of the emergency service is The non-voice emergency service; the selecting device is configured to, when the determination result is yes, select a public safety answering point PSAP supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. The selecting device includes: a first selecting module, configured to select a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE. The selecting device includes: a first sending module, configured to send, to the location query server, location information of the UE carried in the emergency service request message and a type of the non-voice emergency service of the UE; The block is configured to receive an address or routing information from the location query server PSAP; the second selection module is configured to select a PSAP supporting the non-voice emergency service for the UE according to the address or routing information. The selecting device includes: a second sending module, configured to send location information of the UE carried in the emergency service request message to the location query server; and a second receiving module, configured to receive a list of PSAPs from the location query server, where the list includes the PSAP Address or routing information, and the ability of the emergency service type supported by the PSAP; a third selection module, configured to be based on the type of non-voice emergency service of the UE, the address or routing information obtained from the list, and the type of emergency service supported by the PSAP The ability to select a PSAP that supports non-voice emergency services for the UE. In order to achieve the above object, according to another aspect of the present invention, a location query server is also provided. The location query server according to the present invention includes: a first determining module, configured to determine an address or a route of the PSAP supporting the non-voice emergency service according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE The first sending module is configured to send the address or routing information of the PSAP. The second determining module is configured to determine a list of PSAPs according to the location information of the UE carried in the emergency service request message, where the list of PSAPs includes the address of the PSAP. Or routing information and the ability of the PSAP to support the type of emergency service; the second sending module, set to send the PSAP's J table. In order to achieve the above object, according to still another aspect of the present invention, a selection system of a PSAP is provided. The selection system of the PSAP according to the present invention includes the E-CSCF of any of the above and a location query server. With the present invention, the E-CSCF selects a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, and solves the related art that the E-CSCF only uses the location information of the UE. Selecting a PSAP will cause the UE that initiates the non-voice emergency service to fail to select the PSAP that supports the non-voice emergency service, thereby ensuring the selection of the PSAP supporting the non-voice emergency service and providing the UE with the corresponding service of the non-voice emergency service. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a system architecture for implementing an IMS emergency session by a UE accessing a network according to the related art; FIG. 2 is a flowchart of a system for assigning a PSAP and processing an emergency session by the UE initiating an IMS emergency session according to the related art. 3 is a flow chart of a method for selecting a PSAP according to an embodiment of the present invention; FIG. 4 is an interaction flow chart according to a preferred embodiment of the present invention; FIG. 5 is an interaction flow of a preferred embodiment 2 of the present invention; Figure 6 is a block diagram showing the structure of the preferred embodiment 3 of the present invention; Figure 7 is a block diagram showing the structure of an E-CSCF according to an embodiment of the present invention; Figure 8 is a block diagram of a location query server according to an embodiment of the present invention; . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. According to an embodiment of the present invention, a method of selecting a PSAP is provided. FIG. 3 is a flowchart of a method for selecting a PSAP according to an embodiment of the present invention, including the following steps S302 to S306. Step S302: The E-CSCF receives an emergency service request message for instructing the UE to initiate an emergency service. Step S304: The E-CSCF determines, according to the emergency service request message, whether the type of the emergency service is a non-voice emergency service. Step S306, if the judgment result is yes, the E-CSCF selects a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. In the related art, the E-CSCF selects the PSAP for the UE based on the location information of the UE, and the UE that initiates the non-voice emergency service cannot select the PSAP that supports the non-voice emergency service. In the embodiment of the present invention, the E-CSCF selects the PSAP for the UE, and considers the type of the non-voice emergency service, so that the PSAP supporting the non-voice emergency service can be selected, and the corresponding monthly service of the non-voice emergency service is provided for the UE. It should be noted that, if the location information carried in the emergency service request message is specific and reliable, and is sufficient to select the correct PSAP, or the location query server is not deployed in the network, the preferred embodiment may be a location request function (Location Require Function, Referred to as LRF, the E-CSCF directly selects the PSAP for the UE according to the location information of the UE and the determined emergency service type. Preferably, the E-CSCF is based on the location information of the UE and the type of the non-voice emergency service of the UE.

UE选择支持非语音紧急业务的 PSAP包括： E-CSCF根据紧急业务请求消息中携带的 UE的位置信息以及 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息足以选择正确的 PSAP,则直接才艮据该 UE的位置信息以及该 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP, 实现方式简单方便。优选地， E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP包括： E-CSCF向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型；位置查询服务器根据紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型，确定支持非语音紧急业务的 PSAP的地址或路由信息，并发送 PSAP的地址或路由信息； E-CSCF接收来自位置查询服务器 PSAP的地址或路由信息； E-CSCF根据地址或路由信息，为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息不足以选择正确的 PSAP, 则通过 LRF获取 PSAP的信息以便为 UE选择 PSAP, 这样，可以保证为 UE选择到支持非语音紧急业务的 PSAP,并为该 UE提供非语音紧急业务相应的月艮务。同时，由位置查询月艮务器将选择好的 PSAP 的地址或路由信息通知 E-CSCF, 再由 E-CSCF 为 UE 选择支持非语音紧急业务的 PSAP, 可以节约 E-CSCF上的操作，从而提高 E-CSCF的处理效率。优选地， E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP包括： E-CSCF向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息；位置查询服务器根据紧急业务请求消息中携带的 UE的位置信息，确定 PS AP的列表，其中 PS AP的列表包括 PS AP 的地址或路由信息以及 PSAP支持的紧急业务类型的能力，并发送 PSAP的列表； E-CSCF接收来自位置查询服务器的 PSAP 的列表，其中列表包括 PSAP 的地址或路由信息，以及 PSAP支持的紧急业务类型的能力； E-CSCF根据 UE 的非语音紧急业务的类型、从列表中获取的地址或路由信息，以及 PSAP支持的紧急业务类型的能力为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息不足以选择正确的 PSAP, 则通过 LRF获取 PSAP的信息以便为 UE选择 PSAP, 这样，可以保证为 UE选择到支持非语音紧急业务的 PSAP,并为该 UE提供非语音紧急业务相应的月艮务。同时，由 E-CSCF根据 PSAP 的列表为 UE选择支持非语音紧急业务的 PSAP, 可以保证为 UE选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的服务。优选地， E-CSCF 根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务包括以下两种情况。情况一： E-CSCF 根据紧急业务请求消息中是否携带用于指示紧急业务的类型为非语音紧急业务的标识，判断紧急业务的类型是否为非语音紧急业务，其中，标识包括以下之一：单独的 SIP头域，以参数形式携带在现有的 SIP头域；因此， E-CSCF在接收到请求消息后，不需要综合判断请求消息中 SIP信令， SDP信令以及消息中携带的其他报文体便可以判断该请求消息是否为非语音紧急业务，提高了 E-CSCF的判断效率。情况二： The PSAP that the UE chooses to support the non-voice emergency service includes: The E-CSCF selects the PSAP supporting the non-voice emergency service for the UE according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE. In the preferred embodiment, if the location information carried in the emergency service request message is sufficient to select the correct PSAP, the UE selectively selects the non-voice emergency service according to the location information of the UE and the type of the non-voice emergency service of the UE. The PSAP is simple and convenient to implement. Preferably, the E-CSCF selects a PSAP for supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, where the E-CSCF sends the UE carried in the emergency service request message to the location query server. The location information and the type of the non-voice emergency service of the UE; the location query server determines the address or routing information of the PSAP supporting the non-voice emergency service according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE. And sending the address or routing information of the PSAP; the E-CSCF receives the address or routing information from the location query server PSAP; the E-CSCF selects the PSAP supporting the non-voice emergency service for the UE according to the address or routing information. In the preferred embodiment, if the location information carried in the emergency service request message is insufficient to select the correct PSAP, the information of the PSAP is obtained through the LRF to select the PSAP for the UE, so that the UE can be selected to support the non-voice emergency service. The PSAP provides the UE with a corresponding monthly service for non-voice emergency services. At the same time, the location query server notifies the E-CSCF of the address or routing information of the selected PSAP, and then the E-CSCF selects the PSAP supporting the non-voice emergency service for the UE, thereby saving operations on the E-CSCF. Improve the processing efficiency of the E-CSCF. Preferably, the E-CSCF selects a PSAP for supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, where the E-CSCF sends the UE carried in the emergency service request message to the location query server. The location information server determines the list of PS APs according to the location information of the UE carried in the emergency service request message, where the list of PS APs includes the address or routing information of the PS AP and the emergency service type supported by the PSAP, and sends the location information. A list of PSAPs; the E-CSCF receives a list of PSAPs from the location query server, where the list includes the address or routing information of the PSAP, and the capabilities of the emergency service type supported by the PSAP; the E-CSCF is based on the type of non-voice emergency services of the UE, The address or routing information obtained from the list, and the ability of the emergency service type supported by the PSAP, selects a PSAP that supports non-voice emergency services for the UE. In the preferred embodiment, if the location information carried in the emergency service request message is insufficient to select the correct PSAP, the information of the PSAP is obtained through the LRF to select the PSAP for the UE, so that the UE can be selected to support the non-voice emergency service. The PSAP provides the UE with a corresponding monthly service for non-voice emergency services. At the same time, the E-CSCF selects the PSAP supporting the non-voice emergency service for the UE according to the list of the PSAP, and can ensure that the PSAP for the non-voice emergency service is selected for the UE, and the corresponding service of the non-voice emergency service is provided for the UE. Preferably, the E-CSCF determines, according to the emergency service request message, whether the type of the emergency service is a non-voice emergency service, and includes the following two situations. Case 1: The E-CSCF determines whether the type of the emergency service is a non-voice emergency service according to whether the emergency service request message carries an identifier indicating that the emergency service is a non-voice emergency service, wherein the identifier includes one of the following: The SIP header field is carried in the existing SIP header field in the form of a parameter. Therefore, after receiving the request message, the E-CSCF does not need to comprehensively determine the SIP signaling in the request message, the SDP signaling, and other reports carried in the message. The style can judge whether the request message is a non-voice emergency service, and improve the judgment efficiency of the E-CSCF. Case 2:

E-CSCF 才艮据紧急业务请求消息中是否包括用于指示紧急业务的类型为非语音紧急业务的信息，判断紧急业务的类型是否为非语音紧急业务，其中，信息包括以下至少之一： SIP信令、会话描述协议 ( Sessions Description Protectio n, 简称为 SDP )信令、其他报文体。因此，不需要 UE在请求消息中***非语音紧急业务类型的标识， UE可以按照发送普通消息业务的方式发送请求消息，对 UE的能力要求较低。需要说明的是， UE 在发送的紧急业务请求消息中，可以携带上述用于指示紧急业务的类型为非语音紧急业务的标识，该标识可以是一个单独的 SIP头域携带，也可以以参数的形式携带在现有的 SIP头域中。 UE在发送的紧急业务请求消息中，还可以不携带上述用于指示紧急业务的类型为非语音紧急业务的标识，由后续网络实体： P-CSCF、 E-CSCF通过判断消息请求中的 SIP信令， SDP信令以及消息中携带的其他报文体，获得 UE请求的紧急业务类型。优选地，在 E-CSCF接收到用于指示 UE发起紧急业务的紧急业务请求消息之前， P-CSCF接收到来自 UE的紧急业务请求消息； P-CSCF根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务；如果判断结果为是， P-CSCF将紧急业务请求消息发送给 E-CSCF。优选地， P-CSCF 根据紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务包括以下之一： P-CSCF 根据紧急业务请求消息中是否携带用于指示紧急业务的类型为非语音紧急业务的标识，判断紧急业务的类型是否为非语音紧急业务，其中，标识包括以下之一：单独的 SIP头域，以参数形式携带在现有的 SIP头域； P-CSCF根据紧急业务请求消息中是否包括用于指示紧急业务的类型为非语音紧急业务的信息，判断紧急业务的类型是否为非语音紧急业务，其中，信息包括以下至少之一： SIP 信令、会话描述协议 ( Sessions Description Protectio n, 简称为 SDP ) 信令、其他 4艮文体。为了帮助理解上述实施例，下面进一步描述本发明的其他多个优选实施例。优选实施例一本优选实施例一描述了 E-CSCF根据判断出的紧急业务类型直接为 UE选择 PSAP。图 4是才艮据本发明优选实施例一的交互流程图，包括如下的步骤 S402至步骤 S412。步骤 S402, UE发起紧急会话请求，紧急会话请求被路由到 P-CSCF。步骤 S404, P-CSCF在接收到该请求消息后判断该消息请求的紧急业务类型，如果其业务类型是非语音紧急业务则为 UE 选择支持非语音紧急业务的 E-CSCF。具体地，在步骤 S402和步骤 S404中， UE在发起的紧急会话请求消息中会指示该紧急业务类型，且 P-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型的方式包括但不限于以下两种：方式一、在 UE发送该紧急会话请求消息前， UE可以确定该请求消息为非语音紧急消息，则 UE在发送的该请求消息中***指示非语音紧急业务类型的标识，该标识可以是由一个单独的 SIP头域携带，也可以以参数的形式携带在现有的 SIP头域中。 P-CSCF接收到请求消息后，通过判断接收到的请求消息中是否包含指示非语音紧急业务类型的标识，判断该请求消息请求的是否为非语音紧急业务；釆用这种方式， P-CSCF 在接收到请求消息后，不需要综合判断请求消息中 SIP信令， SDP信令以及消息中携带的其他报文体便可以判断该请求消息是否为非语音紧急业务，提高了 P-CSCF的判断效率。方式二、 P-CSCF在接收到请求消息后，对该请求消息中的 SIP信令， SDP 信令以及消息中携带的其他报文体进行检验，从中获取该请求消息是非语音紧急业务釆用这种方式，不需要 UE在请求消息中***非语音紧急业务类型的标识， UE可以按照发送普通消息业务的方式发送请求消息，对 UE 的能力要求较低。步骤 S406 , P-CSCF将紧急会话请求路由到选择的 E-CSCF。步骤 S408, E-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型。若此时，请求消息中携带的位置信息具体且可信，足够选择正确的 PSAP, 或网络中未部署位置查询月艮务器（此实施例中为 LRF ), 则 E-CSCF直接根据 UE的位置信息及判断出的紧急业务类型为 UE选择 PSAP。具体地，在本步骤中， E-CSCF 在接收到该请求消息后判断该请求消息请求的紧急业务类型的方法同步骤 S404, 这里不再赞述。步骤 S410, E-CSCF根据所选择的 PSAP,将紧急会话请求路由到该 PSAP。步骤 S412, 后续 PSAP和 UE间的紧急会话处理过程。优选实施例二本优选实施例二描述了 E-CSCF将 UE的紧急业务类型发送给位置查询月艮务器，该位置查询服务器根据紧急业务类型为 UE选择 PSAP。图 5是才艮据本发明优选实施例二的交互流程图，包括如下的步骤 S502至步骤 S518。步骤 S502, UE发起紧急会话请求，紧急会话请求被路由到 P-CSCF。步骤 S504, P-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型，为 UE选择支持非语音紧急业务的 E-CSCF。具体地，在步骤 S502和步骤 S504中， UE在发起的紧急会话请求消息中会指示该紧急业务类型，且 P-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型的方式同优选实施例一的步骤 S302和步骤 S304, 此时不再赘述。步骤 S506 , P-CSCF将紧急会话请求路由到选择的 E-CSCF。步骤 S508, E-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型。具体地，在本步骤中， E-CSCF 在接收到该请求消息后判断该请求消息请求的紧急业务类型的方法同步骤 S504, 这里不再赞述。步骤 S510, 若请求消息中携带的位置信息不可信，或 IMS***需要对 UE 的位置信息进行合法性检验等原因，则 E-CSCF收到紧急会话请求后，向位置查询月艮务器（此实施例中为 LRF )发起位置查询请求，其中携带解析出的 UE 请求的紧急业务类型，并要求 LRF为 UE分配具有该紧急业务类型的 PSAP。步骤 S512 , LRF执行位置查询过程，查询 UE的当前位置信息。同时 LRF 才艮据 UE当前的位置信息及 UE请求的紧急业务类型执行 PSAP分配过程，为 UE分配合适的 PSAP。步骤 S514, LRF向 E-CSCF返回位置查询响应，包含为 UE分配的 PSAP 的地址或路由信息。步骤 S516, E-CSCF根据所选择的 PSAP,将紧急会话请求路由到该 PSAP。步骤 S518, 后续 PSAP和 UE间的紧急会话处理过程。优选实施例三本优选实施例三描述了位置查询月艮务器居查询到的用户的位置信息返回其负责的区域内 PSAP的列表和其能力，由 E-CSCF才艮据获取的 UE的紧急业务类型为 UE选择 PSAP。图 6是才艮据本发明优选实施例二的交互流程图，包括如下的步骤 S602至步骤 S620。步骤 S602, UE发起紧急会话请求，紧急会话请求被路由到 P-CSCF。步骤 S604, P-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型，为 UE选择支持非语音紧急业务的 E-CSCF。具体地，在步骤 S602和步骤 S604中， UE在发起的紧急会话请求消息中会指示该紧急业务类型，且 P-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型的方式同优选实施例一的步骤 S402和步骤 S404, 此时不再赘述。步骤 S606 , P-CSCF将紧急会话请求路由到选择的 E-CSCF。步骤 S608, E-CSCF在接收到该请求消息后判断该请求消息请求的紧急业务类型。具体地，在本步骤中， E-CSCF 在接收到该请求消息后判断该请求消息请求的紧急业务类型的方法同步骤 S604, 这里不再赞述。步骤 S610, 若请求消息中携带的位置信息不可信，或 IMS***需要对 UE 的位置信息进行合法性检验等原因，则 E-CSCF收到紧急会话请求后，向位置查询服务器（此实施例中为 LRF ) 发起位置查询请求，其中不携带解析出的 UE请求的紧急业务类型，并要求 LRF为 UE分配 PSAP。步骤 S612 , LRF执行位置查询过程，查询 UE的当前位置信息。同时 LRF 根据 UE当前的位置信息选择该区域内 PSAP的列表及其支持的紧急业务类型能力。步骤 S614, LRF向 E-CSCF返回位置查询响应，包含为 UE选择的 PSAP 的列表及其支持的紧急业务类型能力。步骤 S616, E-CSCF 居解析出的 UE请求的紧急业务类型从返回的 PSAP 列表中为 UE选择符合相应紧急业务类型能力 PSAP。步骤 S618, E-CSCF根据所选择的 PSAP,将紧急会话请求路由到该 PSAP。步骤 S620, 后续 PSAP和 UE间的紧急会话处理过程。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***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 4聚。本发明实施例提供了一种 E-CSCF, 该 E-CSCF可以用于实现上述 PSAP 的选择方法。图 7是居本发明实施例的 E-CSCF的结构框图，包括接收装置 72、判断装置 74和选择装置 76 , 下面对其结构进行详细描述。接收装置 72 ,设置为接收用于指示 UE发起紧急业务的紧急业务请求消息；判断装置 74 , 连接至接收装置 72 , 设置为根据接收装置 72接收的紧急业务请求消息，判断紧急业务的类型是否为非语音紧急业务；选择装置 76 , 连接至判断装置 74 , 设置为在判断装置 74判断结果为是时，根据紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型，为 UE选择支持非语音紧急业务的 PSAP。相关技术中， E-CSCF仅仅根据 UE的位置信息为其选择 PSAP, 会导致发起非语音紧急业务的 UE无法选择到支持非语音紧急业务的 PSAP。本发明实施例中， E-CSCF为 UE选择 PSAP考虑到了非语音紧急业务的类型，从而可以保证选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的月艮务。需要说明的是，如果紧急业务请求消息中携带的位置信息具体且可信，足够选择正确的 PSAP, 或网络中未部署位置查询服务器，本优选实施例中可以为位置请求功能（Location Require Function, 简称为 LRF ), 则 E-CSCF直接才艮据 UE的位置信息及判断出的紧急业务类型为 UE选择 PSAP。优选地，选择装置 76包括：第一选择模块 761 , 设置为根据紧急业务请求消息中携带的 UE的位置信息以及 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息足以选择正确的 PSAP,则直接才艮据该 UE的位置信息以及该 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP, 实现方式简单方便。优选地，选择装置 76包括：第一发送模块 762 , 设置为向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型；第一接收模块 763 , 设置为接收来自位置查询服务器 PSAP的地址或路由信息；第二选择模块 764, 连接至第一接收模块 763 , 设置为根据第一接收模块 763接收的地址或路由信息，为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息不足以选择正确的 PSAP, 则通过 LRF获取 PSAP的信息以便第二选择模块 764为 UE选择 PSAP, 这样，可以保证为 UE选择到支持非语音紧急业务的 PSAP, 并为该 UE 提供非语音紧急业务相应的服务。同时，由位置查询月艮务器将选择好的 PSAP 的地址或路由信息通知 E-CSCF, 再由第二选择模块 764为 UE选择支持非语音紧急业务的 PSAP, 可以节约 E-CSCF上的操作，从而提高 E-CSCF的处理效率。优选地，选择装置 76包括：第二发送模块 765, 设置为向位置查询服务器发送紧急业务请求消息中携带的 UE的位置信息；第二接收模块 766, 设置为接收来自位置查询服务器的 PSAP的列表，其中列表包括 PSAP的地址或路由信息，以及 PSAP支持的紧急业务类型的能力；第三选择模块 767, 连接至第二接收模块 766, 设置为根据 UE的非语音紧急业务的类型、从第二接收模块 766接收的列表中获取的地址或路由信息，以及 PSAP支持的紧急业务类型的能力为 UE选择支持非语音紧急业务的 PSAP。本优选实施例中，如果紧急业务请求消息中携带的位置信息不足以选择正确的 PSAP, 则通过 LRF获取 PSAP的信息以便第三选择模块 767为 UE选择 PSAP, 这样，可以保证为 UE选择到支持非语音紧急业务的 PSAP, 并为该 UE 提供非语音紧急业务相应的服务。同时，由第三选择模块 767根据 PSAP的列表为 UE选择支持非语音紧急业务的 PSAP, 可以保证为 UE选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的服务。需要说明的是，装置实施例中描述的 E-CSCF对应于上述的方法实施例，其具体的实现过程在方法实施例中已经进行过详细说明，在此不再赞述。根据本发明的实施例，还提供了一种位置查询服务器。图 8是根据本发明实施例的位置查询服务器的结构框图，包括：第一确定模块 82 , 第一发送模块 84 , 第二确定模块 86和第二发送模块 88。下面对其结构进行详细描述。第一确定模块 82 , 设置为根据紧急业务请求消息中携带的 UE的位置信息和 UE的非语音紧急业务的类型，确定支持非语音紧急业务的 PSAP的地址或路由信息；第一发送模块 84 , 连接至第一确定模块 82 , 设置为发送第一确定模块 82确定的 PSAP的地址或路由信息。第二确定模块 86 ,设置为根据紧急业务请求消息中携带的 UE的位置信息，确定 PSAP的列表，其中 PSAP的列表包括 PSAP的地址或路由信息以及 PSAP 支持的紧急业务类型的能力；第二发送模块 88 , 连接至第二确定模块 86 , 设置为发送第二确定模块 86确定的 PSAP的列表。才艮据本发明的实施例，还提供了一种 PSAP的选择***，包括上述之一的 E-CSCF以及位置查询月艮务器。综上所述，根据本发明的上述实施例，釆用 E-CSCF根据 UE的位置信息和 UE的非语音紧急业务的类型为 UE选择支持非语音紧急业务的 PSAP,解决了相关技术中 E-CSCF仅仅根据 UE的位置信息为其选择 PSAP会导致发起非语音紧急业务的 UE无法选择到支持非语音紧急业务的 PSAP的问题，从而可以保证选择到支持非语音紧急业务的 PSAP, 并为该 UE提供非语音紧急业务相应的月艮务。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 ^"神和原则之内，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。 The E-CSCF determines whether the type of the emergency service is a non-voice emergency service according to whether the emergency service request message includes information indicating that the type of the emergency service is a non-voice emergency service, wherein the letter The information includes at least one of the following: SIP signaling, Session Description Protocol (SDP) signaling, and other message body. Therefore, the UE does not need to insert the identifier of the non-voice emergency service type in the request message, and the UE may send the request message in the manner of sending the normal message service, and the capability requirement for the UE is low. It should be noted that, in the urgent service request message sent by the UE, the identifier that is used to indicate the emergency service is a non-voice emergency service, and the identifier may be carried by a single SIP header field, or may be parameterized. The form is carried in the existing SIP header field. The emergency service request message sent by the UE may not carry the identifier of the type of the non-voice emergency service for indicating the emergency service, and the subsequent network entity: the P-CSCF and the E-CSCF determine the SIP message in the message request. The SDP signaling and other packet bodies carried in the message obtain the emergency service type requested by the UE. Preferably, before the E-CSCF receives the emergency service request message for instructing the UE to initiate the emergency service, the P-CSCF receives the emergency service request message from the UE; the P-CSCF determines the type of the emergency service according to the emergency service request message. Whether it is a non-voice emergency service; if the judgment result is yes, the P-CSCF sends an emergency service request message to the E-CSCF. Preferably, the P-CSCF determines, according to the emergency service request message, whether the type of the emergency service is a non-voice emergency service, including one of the following: The P-CSCF according to the emergency service request message carries a type indicating that the emergency service is a non-voice emergency. The identifier of the service is used to determine whether the type of the emergency service is a non-voice emergency service, where the identifier includes one of the following: a separate SIP header field, carried in the existing SIP header field as a parameter; and the P-CSCF according to the emergency service request message Whether the information indicating the type of the emergency service is a non-voice emergency service, and determining whether the type of the emergency service is a non-voice emergency service, wherein the information includes at least one of the following: SIP signaling, session description protocol (Sess Description Protectio n, abbreviated as SDP) signaling, other 4 艮 style. To assist in understanding the above embodiments, other preferred embodiments of the present invention are further described below. Preferred Embodiment 1 This preferred embodiment describes that the E-CSCF directly selects a PSAP for the UE according to the determined type of emergency service. FIG. 4 is an interaction flowchart according to a preferred embodiment 1 of the present invention, including the following steps S402 to S412. Step S402, the UE initiates an emergency session request, and the emergency session request is routed to the P-CSCF. Step S404: After receiving the request message, the P-CSCF determines the emergency service type requested by the message, and if the service type is non-voice emergency service, selects the E-CSCF supporting the non-voice emergency service for the UE. Specifically, in step S402 and step S404, the UE indicates the emergency service type in the initiated emergency session request message, and the manner in which the P-CSCF determines the emergency service type requested by the request message after receiving the request message includes: The method is not limited to the following two methods: In the first mode, before the UE sends the emergency session request message, the UE may determine that the request message is a non-voice emergency message, and the UE inserts an identifier indicating the non-voice emergency service type in the sent request message. The identifier may be carried by a single SIP header field or may be carried in an existing SIP header field as a parameter. After receiving the request message, the P-CSCF determines whether the received request message includes an identifier indicating a non-voice emergency service type, and determines whether the request message request is a non-voice emergency service. In this manner, the P-CSCF After receiving the request message, it is not necessary to comprehensively determine the SIP signaling in the request message, and the SDP signaling and other message packets carried in the message can determine whether the request message is a non-voice emergency service, thereby improving the judgment efficiency of the P-CSCF. . After the request message is received, the P-CSCF checks the SIP signaling, the SDP signaling, and other packet carried in the message, and obtains the request message from the non-voice emergency service. In this manner, the UE does not need to insert the identifier of the non-voice emergency service type in the request message, and the UE may send the request message according to the manner of sending the normal message service, and the capability requirement for the UE is low. Step S406, the P-CSCF routes the emergency session request to the selected E-CSCF. Step S408, the E-CSCF determines the emergency service type requested by the request message after receiving the request message. If the location information carried in the request message is specific and reliable, enough to select the correct PSAP, or the location query server (LRF in this embodiment) is not deployed in the network, the E-CSCF directly according to the UE. The location information and the determined emergency service type are PSAPs selected by the UE. Specifically, in this step, the method for determining the emergency service type requested by the E-CSCF after receiving the request message is the same as step S404, and is not further described herein. Step S410, the E-CSCF routes the emergency session request to the PSAP according to the selected PSAP. Step S412, an emergency session processing process between the subsequent PSAP and the UE. Preferred Embodiment 2 The preferred embodiment 2 describes that the E-CSCF sends the emergency service type of the UE to the location query server, and the location query server selects the PSAP for the UE according to the emergency service type. FIG. 5 is an interaction flowchart according to a preferred embodiment 2 of the present invention, including the following steps S502 to S518. Step S502, the UE initiates an emergency session request, and the emergency session request is routed to the P-CSCF. Step S504: After receiving the request message, the P-CSCF determines the emergency service type requested by the request message, and selects an E-CSCF supporting the non-voice emergency service for the UE. Specifically, in step S502 and step S504, the UE indicates the emergency service type in the initiated emergency session request message, and the P-CSCF determines the emergency service type requested by the request message after receiving the request message. Step S302 and step S304 of the first embodiment are omitted, and details are not described herein. Step S506, the P-CSCF routes the emergency session request to the selected E-CSCF. Step S508, the E-CSCF determines the emergency service type requested by the request message after receiving the request message. Specifically, in this step, the method for determining the emergency service type requested by the E-CSCF after receiving the request message is the same as step S504, and is not further described herein. Step S510: If the location information carried in the request message is not trusted, or the IMS system needs to check the legitimacy of the location information of the UE, the E-CSCF queries the location server after receiving the emergency session request. In the embodiment, the LRF initiates a location query request, where the parsed emergency service type requested by the UE is carried, and the LRF is required to allocate the PSAP with the emergency service type to the UE. Step S512, the LRF performs a location query process, and queries the current location information of the UE. At the same time, the LRF performs the PSAP allocation process according to the current location information of the UE and the emergency service type requested by the UE, and allocates an appropriate PSAP to the UE. Step S514, the LRF returns a location query response to the E-CSCF, including the address or routing information of the PSAP allocated for the UE. Step S516, the E-CSCF routes the emergency session request to the PSAP according to the selected PSAP. Step S518, an emergency session processing process between the subsequent PSAP and the UE. Preferred Embodiment 3 The preferred embodiment 3 describes the location information of the user queried by the location query server, and returns the list of PSAPs in the area in which it is responsible and the capability of the UE, and the emergency of the UE obtained by the E-CSCF The service type is the PSAP selected by the UE. FIG. 6 is an interaction flowchart according to a preferred embodiment 2 of the present invention, including the following steps S602 to S620. Step S602, the UE initiates an emergency session request, and the emergency session request is routed to the P-CSCF. Step S604: After receiving the request message, the P-CSCF determines the emergency service type requested by the request message, and selects an E-CSCF supporting the non-voice emergency service for the UE. Specifically, in step S602 and step S604, the UE indicates the emergency service type in the initiated emergency session request message, and the P-CSCF determines the emergency service type requested by the request message after receiving the request message. Steps S402 and S404 of the first embodiment are preferred, and details are not described herein. Step S606, the P-CSCF routes the emergency session request to the selected E-CSCF. Step S608, the E-CSCF determines the emergency service type requested by the request message after receiving the request message. Specifically, in this step, the method for determining the emergency service type requested by the E-CSCF after receiving the request message is the same as step S604, and is not further described herein. Step S610: If the location information carried in the request message is not trusted, or the IMS system needs to check the validity of the location information of the UE, the E-CSCF sends the emergency session request to the location query server (in this embodiment). A location query request is initiated for the LRF, which does not carry the parsed emergency service type requested by the UE, and requires the LRF to allocate a PSAP for the UE. Step S612, the LRF performs a location query process, and queries the current location information of the UE. At the same time, the LRF selects a list of PSAPs in the area and its supported emergency service type capabilities according to the current location information of the UE. Step S614, the LRF returns a location query response to the E-CSCF, including a list of PSAPs selected for the UE and their supported emergency service type capabilities. Step S616, the E-CSCF selects the emergency service type requested by the UE from the returned PSAP list, and selects the corresponding emergency service type capability PSAP for the UE. Step S618, the E-CSCF routes the emergency session request to the PSAP according to the selected PSAP. Step S620, an emergency session processing process between the subsequent PSAP and the UE. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed 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 from that herein. The embodiment of the present invention provides an E-CSCF, which can be used to implement the foregoing PSAP selection method. Figure 7 is a block diagram showing the structure of an E-CSCF according to an embodiment of the present invention, including a receiving device 72, a judging device 74, and a selecting device 76. The structure thereof will be described in detail below. The receiving device 72 is configured to receive an emergency service request message for instructing the UE to initiate an emergency service. The determining device 74 is connected to the receiving device 72, and is configured to determine, according to the emergency service request message received by the receiving device 72, whether the type of the emergency service is The non-voice emergency service; the selection device 76 is connected to the judging device 74, and is configured to: according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE, when the judging device 74 determines that the result is yes The UE selects a PSAP that supports non-voice emergency services. In the related art, the E-CSCF selects the PSAP for the UE based on the location information of the UE, and the UE that initiates the non-voice emergency service cannot select the PSAP that supports the non-voice emergency service. In the embodiment of the present invention, the E-CSCF selects the PSAP for the UE, and considers the type of the non-voice emergency service, so that the PSAP supporting the non-voice emergency service can be selected, and the corresponding monthly service of the non-voice emergency service is provided for the UE. It should be noted that, if the location information carried in the emergency service request message is specific and reliable, and is sufficient to select the correct PSAP, or the location query server is not deployed in the network, the preferred embodiment may be a location request function (Location Require Function, Referred to as LRF, the E-CSCF directly selects the PSAP for the UE according to the location information of the UE and the determined emergency service type. Preferably, the selecting means 76 comprises: a first selecting module 761, configured to select a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE. In the preferred embodiment, if the location information carried in the emergency service request message is sufficient to select the correct PSAP, the UE selectively selects the non-voice emergency service according to the location information of the UE and the type of the non-voice emergency service of the UE. The PSAP is simple and convenient to implement. Preferably, the selecting means 76 comprises: a first sending module 762, configured to send the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE to the location query server; the first receiving module 763 is set to Receiving the address or routing information from the location query server PSAP; the second selecting module 764 is connected to the first receiving module 763, and is configured to select, according to the address or routing information received by the first receiving module 763, the non-voice emergency service for the UE. PSAP. In the preferred embodiment, if the location information carried in the emergency service request message is insufficient to select the correct PSAP, the information of the PSAP is obtained through the LRF, so that the second selection module 764 selects the PSAP for the UE, so that the UE can be selected to support. The PSAP of the non-voice emergency service, and provides the corresponding service of the non-voice emergency service for the UE. At the same time, the location query server notifies the E-CSCF of the address or routing information of the selected PSAP, and the second selection module 764 selects the PSAP supporting the non-voice emergency service for the UE, which can save operations on the E-CSCF. , thereby improving the processing efficiency of the E-CSCF. Preferably, the selecting means 76 comprises: a second sending module 765, configured to send the location information of the UE carried in the emergency service request message to the location query server; the second receiving module 766 is configured to receive the list of PSAPs from the location query server The list includes the address or routing information of the PSAP, and the capability of the emergency service type supported by the PSAP; the third selection module 767 is connected to the second receiving module 766, and is set according to the type of the non-voice emergency service of the UE, from the second The address or routing information obtained in the list received by the receiving module 766, and the ability of the emergency service type supported by the PSAP, selects a PSAP that supports non-voice emergency services for the UE. In the preferred embodiment, if the location information carried in the emergency service request message is insufficient to select the correct PSAP, the information of the PSAP is obtained through the LRF, so that the third selection module 767 selects the PSAP for the UE, so that the UE can be selected to support. The PSAP of the non-voice emergency service, and provides the corresponding service of the non-voice emergency service for the UE. At the same time, the third selection module 767 selects the PSAP supporting the non-voice emergency service for the UE according to the list of the PSAP, and can ensure that the PSAP for the non-voice emergency service is selected for the UE, and the corresponding service of the non-voice emergency service is provided for the UE. It should be noted that the E-CSCF described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and is not described herein. According to an embodiment of the present invention, a location query server is also provided. FIG. 8 is a structural block diagram of a location query server according to an embodiment of the present invention, including: a first determining module 82, a first sending module 84, a second determining module 86, and a second sending module 88. The structure is described in detail below. The first determining module 82 is configured to determine, according to the location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE, the address or routing information of the PSAP supporting the non-voice emergency service; the first sending module 84, Connected to the first determining module 82, the address or routing information of the PSAP determined by the first determining module 82 is sent. The second determining module 86 is configured to determine, according to the location information of the UE carried in the emergency service request message, the list of PSAPs, where the list of PSAPs includes the address or routing information of the PSAP and the capability of the emergency service type supported by the PSAP; The module 88 is coupled to the second determining module 86 and configured to transmit a list of PSAPs determined by the second determining module 86. According to an embodiment of the present invention, there is also provided a PSAP selection system, including the E-CSCF of one of the above and a location query server. In summary, according to the foregoing embodiment of the present invention, the E-CSCF selects a PSAP supporting the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE, and solves the related technology in the E- The selection of the PSAP by the CSCF based on the location information of the UE may cause the UE that initiates the non-voice emergency service to fail to select the PSAP supporting the non-voice emergency service, thereby ensuring the selection of the PSAP supporting the non-voice emergency service, and for the UE. Provide the corresponding monthly service for non-voice emergency services. Obviously, those skilled in the art should understand that the above 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. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

权利要求书 Claims

1. 一种公共安全应答点 PS AP的选择方法，包括： 1. A public safety answering point PS AP selection method, including:

紧急呼叫会话控制功能 E-CSCF接收到用于指示用户设备 UE发起紧急业务的紧急业务请求消息； Emergency call session control function The E-CSCF receives an emergency service request message for instructing the user equipment UE to initiate an emergency service;

所述 E-CSCF 居所述紧急业务请求消息，判断所述紧急业务的类型是否为非语音紧急业务； The E-CSCF is in the emergency service request message, and determines whether the type of the emergency service is a non-voice emergency service;

如果所述判断结果为是，所述 E-CSCF 居所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型，为所述 UE选择支持所述非语音紧急业务的 PSAP。 And if the judgment result is yes, the E-CSCF is located at the location information of the UE and the type of the non-voice emergency service of the UE, and selects, for the UE, a PSAP that supports the non-speech emergency service.

2. 根据权利要求 1所述的方法，其中，所述 E-CSCF根据所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型，为所述 UE选择支持所述非语音紧急业务的 PSAP包括： 2. The method according to claim 1, wherein the E-CSCF selects to support the non-voice emergency for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. The PSAP of the business includes:

所述 E-CSCF 居所述紧急业务请求消息中携带的所述 UE的位置信息以及所述 UE的所述非语音紧急业务的类型为所述 UE选择支持所述非语音紧急业务的 PSAP。 The location information of the UE carried in the emergency service request message and the type of the non-voice emergency service of the UE are selected by the E-CSCF to support the PSAP of the non-voice emergency service.

3. 根据权利要求 1所述的方法，其中，所述 E-CSCF根据所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型，为所述 UE选择支持所述非语音紧急业务的 PSAP包括： The method according to claim 1, wherein the E-CSCF selects the non-voice emergency for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. The PSAP of the business includes:

所述 E-CSCF向位置查询服务器发送所述紧急业务请求消息中携带的所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型； Sending, by the E-CSCF, location information of the UE carried in the emergency service request message and a type of the non-voice emergency service of the UE to a location query server;

所述位置查询服务器根据所述紧急业务请求消息中携带的所述 UE 的位置信息和所述 UE的所述非语音紧急业务的类型，确定所述支持所述非语音紧急业务的 PSAP的地址或路由信息，并发送所述 PSAP的地址或路由信息； Determining, by the location query server, the address of the PSAP supporting the non-voice emergency service or the location of the non-voice emergency service of the UE according to the location information of the UE carried in the emergency service request message Routing information, and sending the address or routing information of the PSAP;

所述 E-CSCF接收来自所述位置查询服务器所述 PSAP的地址或路由信息； The E-CSCF receives address or routing information from the PSAP of the location query server;

所述 E-CSCF根据所述地址或所述路由信息，为所述 UE选择支持所述非语音紧急业务的 PSAP。根据权利要求 1所述的方法，其中，所述 E-CSCF根据所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型，为所述 UE选择支持所述非语音紧急业务的 PSAP包括： The E-CSCF selects, for the UE, a PSAP that supports the non-voice emergency service according to the address or the routing information. The method according to claim 1, wherein the E-CSCF selects the non-voice emergency service for the UE according to the location information of the UE and the type of the non-voice emergency service of the UE. The PSAP includes:

所述 E-CSCF向位置查询服务器发送所述紧急业务请求消息中携带的所述 UE的位置信息； Sending, by the E-CSCF, location information of the UE carried in the emergency service request message to a location query server;

所述位置查询服务器根据所述紧急业务请求消息中携带的所述 UE 的位置信息，确定所述 PSAP的列表，其中所述 PSAP的列表包括所述 PSAP的地址或路由信息以及所述 PSAP支持的紧急业务类型的能力，并发送所述 PSAP的列表； Determining, by the location query server, a list of the PSAPs according to location information of the UE carried in the emergency service request message, where the list of PSAPs includes address or routing information of the PSAP and supported by the PSAP The ability of the emergency service type and send a list of the PSAPs;

所述 E-CSCF接收来自所述位置查询服务器的所述 PSAP的列表，并获取所述列表中的所述 PSAP的地址或路由信息以及所述 PSAP支持的紧急业务类型的能力； Receiving, by the E-CSCF, a list of the PSAPs from the location query server, and acquiring an address or routing information of the PSAP in the list and an ability of an emergency service type supported by the PSAP;

所述 E-CSCF根据所述 UE的所述非语音紧急业务的类型、从所述列表中获取的所述地址或所述路由信息以及从所述列表中获取的所述 PSAP支持的紧急业务类型的能力，为所述 UE选择支持所述非语音紧急业务的 PSAP。根据权利要求 1至 4中任一项所述的方法，其中，所述 E-CSCF根据所述紧急业务请求消息，判断所述紧急业务的类型是否为非语音紧急业务包括以下之一： The E-CSCF according to the type of the non-voice emergency service of the UE, the address or the routing information obtained from the list, and an emergency service type supported by the PSAP obtained from the list The ability to select a PSAP that supports the non-voice emergency service for the UE. The method according to any one of claims 1 to 4, wherein the E-CSCF determines, according to the emergency service request message, whether the type of the emergency service is a non-voice emergency service, including one of the following:

所述 E-CSCF根据所述紧急业务请求消息中是否携带用于指示所述紧急业务的类型为非语音紧急业务的标识，判断所述紧急业务的类型是否为非语音紧急业务，其中，所述标识包括以下之一：单独的会话发起协议 SIP头域，以参数形式携带在现有的 SIP头域； Determining, by the E-CSCF, whether the type of the emergency service is a non-voice emergency service, according to whether the emergency service request message carries an identifier indicating that the type of the emergency service is a non-voice emergency service, where The identifier includes one of the following: a separate session initiation protocol SIP header field, carried in the existing SIP header field as a parameter;

所述 E-CSCF才艮据所述紧急业务请求消息中是否包括用于指示所述紧急业务的类型为非语音紧急业务的信息，判断所述紧急业务的类型是否为非语音紧急业务，其中，所述信息包括以下至少之一： SIP 信令、会话描述协议 SDP信令、其他文体。根据权利要求 1至 4中任一项所述的方法，其中，在所述 E-CSCF接收到用于指示所述 UE发起紧急业务的所述紧急业务请求消息之前，还包代理呼叫会话控制功能 P-CSCF接收到来自所述 UE的所述紧急业务请求消息； And determining, by the E-CSCF, whether the type of the emergency service is a non-voice emergency service, according to whether the emergency service request message includes information indicating that the type of the emergency service is a non-voice emergency service, where The information includes at least one of the following: SIP signaling, session description protocol SDP signaling, and other styles. The method according to any one of claims 1 to 4, wherein before the E-CSCF receives the emergency service request message for instructing the UE to initiate an emergency service, The proxy call session control function P-CSCF receives the emergency service request message from the UE;

所述 P-CSCF 居所述紧急业务请求消息，判断所述紧急业务的类型是否为非语音紧急业务； The P-CSCF is in the emergency service request message, and determines whether the type of the emergency service is a non-voice emergency service;

如果所述判断结果为是，所述 P-CSCF将所述紧急业务请求消息发送给所述 E-CSCF。 If the result of the determination is yes, the P-CSCF sends the emergency service request message to the E-CSCF.

7. 一种紧急呼叫会话控制功能 E-CSCF, 包括： 7. An emergency call session control function E-CSCF, including:

接收装置，设置为接收用于指示用户设备 UE发起紧急业务的紧急业务请求消息；判断装置，设置为根据所述紧急业务请求消息，判断所述紧急业务的类型是否为非语音紧急业务； The receiving device is configured to receive an emergency service request message for instructing the user equipment UE to initiate an emergency service, and the determining device is configured to determine, according to the emergency service request message, whether the type of the emergency service is a non-voice emergency service;

选择装置，设置为在所述判断结果为是时，根据所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型，为所述 UE选择支持所述非语音紧急业务的公共安全应答点 PSAP。 And selecting, when the determining result is yes, selecting, according to the location information of the UE and the type of the non-voice emergency service of the UE, a public security for supporting the non-voice emergency service for the UE Answer point PSAP.

8. 根据权利要求 7所述的 E-CSCF, 其中，所述选择装置包括： 8. The E-CSCF according to claim 7, wherein the selecting means comprises:

第一选择模块，设置为根据所述紧急业务请求消息中携带的所述 UE 的位置信息以及所述 UE的所述非语音紧急业务的类型为所述 UE选择支持所述非语音紧急业务的 PSAP。 a first selection module, configured to select, according to the location information of the UE that is carried in the emergency service request message, and the type of the non-voice emergency service of the UE, a PSAP that supports the non-voice emergency service .

9. 根据权利要求 7所述的 E-CSCF, 其中，所述选择装置包括： 9. The E-CSCF according to claim 7, wherein the selecting means comprises:

第一发送模块，设置为向位置查询服务器发送所述紧急业务请求消息中携带的所述 UE的位置信息和所述 UE的所述非语音紧急业务的类型； The first sending module is configured to send, to the location query server, location information of the UE carried in the emergency service request message and a type of the non-voice emergency service of the UE;

第一接收模块，设置为接收来自所述位置查询服务器所述 PSAP的地址或路由信息； a first receiving module, configured to receive an address or routing information of the PSAP from the location query server;

第二选择模块，设置为根据所述地址或所述路由信息，为所述 UE 选择支持所述非语音紧急业务的 PSAP。 And a second selecting module, configured to select, according to the address or the routing information, a PSAP that supports the non-voice emergency service for the UE.

10. 根据权利要求 7所述的 E-CSCF, 其中，所述选择装置包括： 10. The E-CSCF according to claim 7, wherein the selecting means comprises:

第二发送模块，设置为向所述位置查询服务器发送所述紧急业务请求消息中携带的所述 UE的位置信息；第二接收模块，设置为接收来自所述位置查询服务器的所述 PSAP 的列表，其中所述列表包括所述 PSAP 的地址或路由信息，以及所述 PSAP支持的紧急业务类型的能力； a second sending module, configured to send location information of the UE carried in the emergency service request message to the location query server; a second receiving module, configured to receive a list of the PSAPs from the location query server, where the list includes address or routing information of the PSAP, and capabilities of the emergency service type supported by the PSAP;

第三选择模块，设置为根据所述 UE的所述非语音紧急业务的类型、从所述列表中获取的所述地址或所述路由信息，以及所述 PSAP支持的紧急业务类型的能力为所述 UE选择支持所述非语音紧急业务的 PSAP。 a third selection module, configured to: according to the type of the non-voice emergency service of the UE, the address or the routing information obtained from the list, and the capability of the emergency service type supported by the PSAP The UE selects a PSAP that supports the non-voice emergency service.

11. 一种位置查询艮务器，包括： 11. A location query server, including:

第一确定模块 ,设置为根据所述紧急业务请求消息中携带的所述 UE 的位置信息和所述 UE的所述非语音紧急业务的类型，确定所述支持所述非语音紧急业务的 PSAP的地址或路由信息； a first determining module, configured to determine, according to the location information of the UE that is carried in the emergency service request message, and the type of the non-voice emergency service of the UE, the PSAP that supports the non-voice emergency service Address or routing information;

第一发送模块，设置为发送所述 PSAP的地址或路由信息；第二确定模块 ,设置为根据所述紧急业务请求消息中携带的所述 UE 的位置信息，确定所述 PSAP的列表，其中所述 PSAP的列表包括所述 PSAP的地址或路由信息以及所述 PSAP支持的紧急业务类型的能力；第二发送模块，设置为发送所述 PSAP的列表。 a first sending module, configured to send an address or routing information of the PSAP; a second determining module, configured to determine, according to location information of the UE carried in the emergency service request message, a list of the PSAP, where The list of PSAPs includes the address or routing information of the PSAP and the capabilities of the emergency service type supported by the PSAP; and a second sending module, configured to send a list of the PSAPs.

12. 一种公共安全应答点 PSAP的选择***，包括权利要求 7至 10中任一项所述的紧急呼叫会话控制功能 E-CSCF以及权利要求 11所述的位置查询服务器。 A public safety answering point PSAP selection system comprising the emergency call session control function E-CSCF according to any one of claims 7 to 10 and the location query server according to claim 11.