WO2008046266A1 - Ip multimedia subsystem for selecting home subscriber server automatically - Google Patents
Ip multimedia subsystem for selecting home subscriber server automatically Download PDFInfo
- Publication number
- WO2008046266A1 WO2008046266A1 PCT/CN2006/003685 CN2006003685W WO2008046266A1 WO 2008046266 A1 WO2008046266 A1 WO 2008046266A1 CN 2006003685 W CN2006003685 W CN 2006003685W WO 2008046266 A1 WO2008046266 A1 WO 2008046266A1
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- WIPO (PCT)
- Prior art keywords
- function device
- user
- home subscriber
- home
- available
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4588—Network directories; Name-to-address mapping containing mobile subscriber information, e.g. home subscriber server [HSS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
Definitions
- the present invention relates to an IP multimedia subsystem, and more particularly to an automatic selection method for a home subscriber server of an IP multimedia subsystem and an IP multimedia subsystem for automatically selecting a home subscriber server. Background technique
- the Home Subscriber Server is a central database for storing user-related information, which is equivalent to the HLR (Home Location Register) of the traditional mobile network. Location register).
- HLR Home Location Register
- the HSS also stores customized data related to the user for processing the multimedia session, including: local information, confidential information (proof and authorization information), registration information, service trigger information, The user's personal information and the S-CSCF (Serving Call Session Control Function) assigned to the user, etc.
- the IMS network structure diagram is shown in Figure 3.
- the CSCF Call Session Control Function
- PVI Public User Identity
- PUI Primary User Identity
- the CSCF queries the SLF for the HSS address to which the user belongs based on the SLF (Subscriber Location Function) address, and then sends the service request to the HSS.
- the SLF locates which HSS the user belongs to according to the following three conditions:
- the PVI/PUI is a phone number, it is searched based on the HSS information to which the configured phone number segment belongs.
- HSS If you configure the HSS information corresponding to the user's PVI/PUI, look it up based on this. Because the HSS stores the user's subscription information and location information, if the HSS is damaged, such as an earthquake or a fire, the entire HSS is damaged, the registration and call services of the user belonging to the HSS cannot be implemented, so the HSS needs to be considered. Disaster tolerance issues. The implementation definition of HSS disaster tolerance is not given in the current protocol specification. When the HSS fails and the service cannot be processed normally, the SLF does not know the actual status of the HSS and still returns the information of the failed HSS to the CSCF. Therefore, there is a need for a solution for implementing automatic switching of HSS disaster tolerance in an IP multimedia subsystem to solve the above problems.
- a primary object of the present invention is to provide an automatic selection method and system for a home subscriber server, which is used to provide an HSS disaster recovery automatic handover implementation method, which is used to automatically replace a disaster recovery backup HSS when an HSS failure occurs. It provides services that ensure that CSCF queries and downloads continue.
- the present invention provides an automatic selection method of a home subscriber server of an IP multimedia subsystem.
- the automatic selection method of the home subscriber server includes the following steps: Step S102: respectively set an interface between the user positioning function device and the plurality of home subscriber servers; Step S104: The user positioning function device queries multiple home subscriber servers through the interface according to a predetermined timing.
- step S106 when the call session control function device queries the user location function device for the home user server information, the user location function device selects an available home user server according to the recorded status of the plurality of home user servers. Return its information to the call session control function device. Data replication is performed synchronously or asynchronously between multiple home subscriber servers.
- step S104 the user positioning function device initiates a status query request to the plurality of home user servers, and determines the status of each home user server according to the response or non-response of the plurality of home user servers.
- step S104 if the home server response status is normal, the user positioning function device determines that the home user server is available, and if the home user server response is in a failure or does not respond within a predetermined time, the user positioning function device will The home subscriber server is determined to be unavailable.
- the user location function device may select an available home user server in the state-of-available home subscriber server according to a predetermined priority.
- the user location function device may alternately select an available home subscriber server among the home subscriber servers whose status is available.
- the user location function device may randomly select an available home subscriber server among the home subscriber servers whose status is available.
- the present invention provides an IP multimedia subsystem that automatically selects a home subscriber server.
- the IP multimedia subsystem includes: a plurality of home subscriber servers; a call session control function device, configured to query the user location function device for the home subscriber server information; the state query interface is respectively set between the user location function device and the plurality of home subscriber servers.
- the user positioning function device is configured to query the status of the plurality of home users by using the status query interface according to the predetermined timing, and update the record, and is used for querying the home user server by the call session control function device to the user positioning function device.
- an available home subscriber server is selected and its information is returned to the call session control function device.
- Data replication is performed synchronously or asynchronously between multiple home subscriber servers.
- the user positioning function device is configured to initiate a status query request to multiple home user servers, and determine the status of each home user server according to the response or non-response of multiple home user servers. If the home subscriber server response status is normal, the subscriber location function device determines that the home subscriber server is available. If the home subscriber response is faulty or does not respond within a predetermined time, the subscriber location function device determines the home subscriber server as unavailable.
- the user location function device is configured to select an available home subscriber server among the home subscriber servers whose status is available according to a predetermined priority.
- the user location function device is configured to alternately select an available home subscriber server among the home subscriber servers whose status is available.
- the user location function device is configured to randomly select an available home subscriber server among the home subscribers whose status is available.
- FIG. 1 is a flow chart of an automatic selection method of a home subscriber server according to the present invention
- FIG. 2 is a block diagram of an IP multimedia subsystem for automatically selecting a home subscriber server according to the present invention
- 4 is a schematic diagram of an improved architecture in accordance with an embodiment of the present invention
- FIG. 5 is a flow diagram of a CSCF and SLF interaction flow in the prior art
- FIG. 6 is an improved HSS state detection according to an embodiment of the present invention.
- an automatic selection method of a home subscriber server of an IP multimedia subsystem includes the following steps: Step S102: Set a connection ⁇ between a user location function device and a plurality of home subscriber servers, respectively. Data replication is performed synchronously or asynchronously between multiple home subscriber servers. Step S104: The user positioning function device queries the status of the plurality of home subscriber servers through the interface according to the predetermined timing, and updates the record.
- the user positioning function device initiates a status query request to the plurality of home user servers, and determines the status of each home user server according to the response or non-response of the plurality of home server servers. If the home subscriber server response status is normal, the subscriber location function device determines that the home subscriber server is available, and if the home subscriber server response is in a failure or does not respond within a predetermined time, the subscriber location function device determines the home subscriber server to be unavailable. Step S106, the call session control function device queries the user location function device to query the home user service. Select an available home subscriber server and return its information to the call session control function device.
- the user location function device can select an available home subscriber server among the available home subscriber servers in accordance with a predetermined priority.
- the user location function device can alternately select an available home subscriber server among the home subscriber servers whose status is available.
- the user location function device can randomly select an available home subscriber server among the home subscriber servers whose status is available. Referring to FIG.
- the IP multimedia subsystem 10 for automatically selecting a home subscriber server includes: a plurality of home subscriber servers 20; a call session control function device 30, configured to query the subscriber location function device 40 for the home subscriber server 20 information;
- the status query interface 50 is respectively disposed between the user location function device 40 and the plurality of home user servers 20; the user location function device 40 is configured to query the plurality of home user servers 20 through the status query interface 50 according to a predetermined timing.
- the status, and the update record, and when the call session control function device 30 queries the user location function device 40 for the home subscriber server 20 information selects an available home subscriber server 20 based on the recorded status of the plurality of home subscriber servers 20. And return its information to the call session control function device 30.
- the user location function device 40 is configured to initiate a status query request to the plurality of home user servers 20, and determine the status of each home user server 20 based on the response or non-response of the plurality of home user servers 20. If the home subscriber server 20 responds to a normal state, the subscriber location function device 40 determines that the home subscriber server 20 is available. If the home subscriber server 20 responds to a failure or does not respond within a predetermined time, the subscriber location function device 40 will The home subscriber server 20 is determined to be unavailable.
- the user location function device 40 is configured to select the available home subscriber server 20 in the home subscriber server 20 whose status is available according to a predetermined priority.
- the user location function device 40 is configured to select the available home subscribers 20 in turn in the home subscribers 20 that are available.
- the user location function device 40 is configured to randomly select the available home subscriber server 20 among the home subscriber servers 20 whose status is available.
- the invention relates to a method for implementing automatic disaster recovery switching of an HSS by an IP multimedia subsystem. From the previous description, you can see that there are multiple HSSs in the network. The SLF assumes the HSS selection function. Therefore, you can increase the HSS disaster recovery configuration information on the SLF to implement an HSS fault and use its corresponding disaster recovery HSS. Continue to provide services.
- the present invention has two major improvements to existing systems:
- the SLF can select one HSS from a group of HSSs to return its address information to the CSCF.
- HSS group Data replication is implemented in a synchronous or asynchronous manner among multiple HSSs to ensure that the user's subscription information and location information are consistent.
- HSSs may be referred to as an HSS group.
- HSS information Plan the access priority for the HSS belonging to the same HSS group in the SLF (only one HSS selection method is listed here, or it may be round robin or random selection, etc.), for example, the SLF is configured according to the telephone number segment.
- HSS information can be configured as follows:
- the SLF periodically initiates a state detection process to all HSSs configured in the SLF. According to the result of the state detection, the HSS is identified as available, as shown in FIG. 6.
- the CSCF to the SLF queries the HSS information to which the user belongs, the user's number is provided, for example, 8613958057777.
- the SLF judges that the number of the user falls between the number segments 8613958060000 ⁇ 8613958069999.
- the SLF determines whether HSS1 is currently available. If HSS1 is available, it returns the address information of HSS1 to the CSCF. If HSS1 is not available, continue to determine if there are other available nodes, such as HSS2 and HSS3, and if there are available nodes, select and return to CSCF.
- IMS Inter-Calling Session Control Function
- P-CSCF Pro-Call Session Control Function
- Session control function home user server, User location feature.
- PSTN/PLMN Public Switched Telephone Network I Public Land Mobile Network
- the present invention focuses on the relationship between SLF and HSS.
- Figure 4 is an extension of the existing architecture. The status detection interface of the SLF and the HSS is added. The SLF can be used to determine whether the current HSS is available.
- the interface implementation process includes the following steps, as shown in FIG.
- Step 401 The SLF periodically initiates a status query request to all HSSs configured in the SLF.
- Step 402 After receiving the status query request of the SLF, the HSS returns to the current running of the HSS. Status; SLF judges the status query result returned by HSS. If HSS feedback this HSS is faulty, then SLF ⁇ ! The HSS flag is not available; if the HSS does not return a response within the specified time, the SLF actively takes the HSS flag as unavailable.
- FIG. 5 is a flow chart of the HSCS for querying the user's home to the SLF in the prior art, including the following steps:
- Step 302 The CSCF completes the service control judgment.
- Step 303 The CSCF initiates a request to the SLF to query the HSS information to which the user belongs.
- Step 304 The SLF searches for the configured HSS information according to the user information in the request message, such as the user phone number, and returns the information to the CSCF.
- Step 305 CSCF to the slave SLF
- the HSS address obtained by the query is sent to the request, and the service processing is continued.
- FIG. 7 is an improvement of the HSS process for querying the user ownership of the CSCF from the CSCF in the present invention, describes the internal flow of the SLF, selects an available HSS, and returns it to the CSCF. Includes the following steps.
- Step 501 The CSCF receives the service request, which may be a user registration or a call request.
- Step 502 The CSCF completes the service control judgment.
- Step 503 The CSCF initiates a request to the SLF to query the HSS information to which the user belongs.
- Step 504 The SLF searches for the configured HSS group information according to the user information in the request message, such as the user's phone number, and selects an available HSS to return to the CSCF.
- Step 505 The CSCF sends a request to the HSS address obtained from the SLF query to continue the service. deal with.
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Abstract
Description
自动选择归属用户服务器的 IP多媒体子系统 技术领域 本发明涉及 IP多媒体子系统， 尤其涉及一种 IP多媒体子系统的归属用户 月 务器的自动选择方法和自动选择归属用户服务器的 IP多媒体子系统。 背景技术 TECHNICAL FIELD The present invention relates to an IP multimedia subsystem, and more particularly to an automatic selection method for a home subscriber server of an IP multimedia subsystem and an IP multimedia subsystem for automatically selecting a home subscriber server. Background technique
3GPP R5所规范的 IP多媒体子系统 ( IP Multimedia Subsystem , IMS )中 , HSS ( Home Subscriber Server, 归属用户服务器） 是存储用户相关信息的中心 数据库，相当于传统移动网的 HLR( Home Location Register,归属位置寄存器）。 HSS除了存储用户的签约信息与位置信息外， 还保存有与用户相关的、 用来处 理多媒体会话的定制数据， 包括： 本地信息、 保密信息 （证明与授权信息）、 注册信息、 业务触发信息、用户个人信息和分配给用户的 S-CSCF ( Serving Call Session Control Function, 服务呼叫会话控制功能） 等， IMS网络结构图如图 3 所示。 如果网络中只有一个 HSS , 则 CSCF ( Call Session Control Function, 呼叫 会话控制功能）根据各自配置的 HSS地址， 将业务请求发给 HSS , 请求中用 户用 PVI ( Public User Identity , 公有用户标示 )或者 PUI ( Private User Identity, 私有用户标示） 标示。 如果网络中存在多个 HSS, 则 CSCF会根据各自配置的 SLF ( Subscriber Location Function, 用户定位功能） 地址， 到 SLF查询用户归属的 HSS地址， 然后再将业务请求发到该 HSS上。 In the IP Multimedia Subsystem (IMS) specified by 3GPP R5, the Home Subscriber Server (HSS) is a central database for storing user-related information, which is equivalent to the HLR (Home Location Register) of the traditional mobile network. Location register). In addition to storing the user's subscription information and location information, the HSS also stores customized data related to the user for processing the multimedia session, including: local information, confidential information (proof and authorization information), registration information, service trigger information, The user's personal information and the S-CSCF (Serving Call Session Control Function) assigned to the user, etc., the IMS network structure diagram is shown in Figure 3. If there is only one HSS in the network, the CSCF (Call Session Control Function) sends a service request to the HSS according to the configured HSS address, and the requesting user uses PVI (Public User Identity) or PUI. (Private User Identity). If there are multiple HSSs in the network, the CSCF queries the SLF for the HSS address to which the user belongs based on the SLF (Subscriber Location Function) address, and then sends the service request to the HSS.
SLF中根据以下三种情况定位用户属于哪个 HSS: The SLF locates which HSS the user belongs to according to the following three conditions:
1 )如果 PVI/PUI是电话号码， 则根据配置的电话号码段归属的 HSS信息 查找。 1) If the PVI/PUI is a phone number, it is searched based on the HSS information to which the configured phone number segment belongs.
2 ) 如果用户签约了域， 则根据域归属的 HSS来查找。 2) If the user has signed up for the domain, it will look up according to the HSS to which the domain belongs.
3 ) 如果配置用户的 PVI/PUI对应的 HSS信息， 则根据此查找。 因为 HSS存放用户的签约信息和位置信息， 因此， 如果 HSS出现故障， 比如地震或火灾等原因造成整个 HSS毁损， 则归属于该 HSS的用户的注册和 呼叫等业务无法实现， 因此需要考虑 HSS的容灾问题。 而目前的协议规范中未 给出 HSS容灾的实现定义。 当 HSS发生故障， 实际无法处理业务时， SLF不 知道 HSS的实际状态， 仍然向 CSCF返回故障 HSS的信息。 因此，需要一种在 IP多媒体子系统中实现 HSS容灾自动切换的解决方案， 用以解决上述问题。 发明内容 本发明的主要目的在于提供一种归属用户服务器的自动选择方法和系统， 用于提供一种 HSS容灾自动切换的实现方法， 用以实现 HSS故障时， 自动使 用容灾备份的 HSS代替它提供业务，保证 CSCF的查询和下载等流程能够继续。 为了实现上述目的， 根据本发明的第一方面， 本发明提供了一种 IP多媒 体子系统的归属用户服务器的自动选择方法。 归属用户服务器的自动选择方法 包^以下步骤： 步骤 S102, 分别设置用户定位功能设备与多个归属用户服务器之间的接 口； 步骤 S104, 用户定位功能设备按照预定定时通过接口查询多个归属用户 服务器的状态， 并更新记录； 步驟 S106, 呼叫会话控制功能设备向用户定位功能设备查询归属用户服 务器信息时， 用户定位功能设备根据所记录的多个归属用户服务器的状态， 选 择一个可用归属用户服务器并返回其信息给呼叫会话控制功能设备。 在多个归属用户服务器之间通过同步或异步的方式进行数据复制。 在步骤 S104中， 用户定位功能设备向多个归属用户服务器发起状态查询 请求， 并根据多个归属用户服务器的响应或无响应确定每个归属用户服务器的 状态。 在步骤 S104 中， 如果归属用户月艮务器响应状态正常， 则用户定位功能 设备将归属用户服务器确定为可用， 如果归属用户服务器响应处于故障或在预 定时间内未响应， 则用户定位功能设备将归属用户服务器确定为不可用。 在步骤 S106中， 用户定位功能设备可以按照预定的优先级在状态为可用 的归属用户服务器中选择可用归属用户月 务器。 在步骤 S106 中， 用户定位功 能设备可以轮流地在状态为可用的归属用户服务器中选择可用归属用户服务 器。 在步骤 S106 中， 用户定位功能设备可以随机地在状态为可用的归属用户 服务器中选择可用归属用户服务器。 为了实现上述目的，根据本发明的第二方面， 本发明提供了一种自动选择 归属用户月艮务器的 IP多媒体子系统。 IP多媒体子系统包括： 多个归属用户服 务器； 呼叫会话控制功能设备， 用于向用户定位功能设备查询归属用户服务器 信息； 状态查询接口， 分别设置在用户定位功能设备与多个归属用户服务器之 间； 用户定位功能设备， 用于按照预定定时通过^ 态查询接口查询多个归属用 户月良务器的状态， 并更新记录， 以及用于当呼叫会话控制功能设备向用户定位 功能设备查询归属用户服务器信息时， 根据所记录的多个归属用户服务器的状 态， 选择一个可用归属用户服务器并返回其信息给呼叫会话控制功能设备。 在多个归属用户服务器之间通过同步或异步的方式进行数据复制。 用户定位功能设备用于向多个归属用户服务器发起状态查询请求，并根据 多个归属用户服务器的响应或无响应确定每个归属用户服务器的状态。 如果归 属用户服务器响应状态正常， 则用户定位功能设备将归属用户服务器确定为可 用， 如果归属用户月良务器响应处于故障或在预定时间内未响应， 则用户定位功 能设备将归属用户服务器确定为不可用。 可选地，用户定位功能设备用于按照预定的优先级在状态为可用的归属用 户服务器中选择可用归属用户服务器。 可选地， 用户定位功能设备用于轮流地 在状态为可用的归属用户服务器中选择可用归属用户服务器。 可选地， 用户定 位功能设备用于随机地在状态为可用的归属用户 J艮务器中选择可用归属用户 服务器。 通过上述技术方案， 本发明实现了当一个 HSS 出现故障时， SLF能及时 识别， 并可通过 SLF侧自动切换 CSCF的访问路径到故障 HSS对应的容灾备 份 HSS上， 保证了业务的正确性。 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是根据本发明的归属用户服务器的自动选择方法的流程图； 图 2是根据本发明的自动选择归属用户服务器的 IP多媒体子系统的框图； 图 3是 IMS现有体系结构的示意图； 图 4是根据本发明实施例的改进的体系结构的示意图； 图 5是现有技术中 CSCF与 SLF交互流程的流程图； 图 6是根据本发明实施例的改进的 HSS状态检测流程的流程图； 图 7是根据本发明实施例的改进的 CSCF与 SLF交互流程的流程图。 具体实施方式 下面将参考附图详细说明本发明。 参照图 1 , 根据本发明的 IP多媒体子系统的归属用户服务器的自动选择 方法包括以下步骤： 步骤 S 102 , 分别设置用户定位功能设备与多个归属用户服务器之间的接 σ 。 在多个归属用户服务器之间通过同步或异步的方式进行数据复制。 步骤 S104, 用户定位功能设备按照预定定时通过接口查询多个归属用户 服务器的状态， 并更新记录。 用户定位功能设备向多个归属用户服务器发起状态查询请求，并根据多个 归属用户 良务器的响应或无响应确定每个归属用户月艮务器的状态。 如果归属用户服务器响应状态正常，则用户定位功能设备将归属用户服务 器确定为可用， 如果归属用户服务器响应处于故障或在预定时间内未响应， 则 用户定位功能设备将归属用户服务器确定为不可用。 步骤 S106 , 呼叫会话控制功能设备向用户定位功能设备查询归属用户服 择一个可用归属用户服务器并返回其信息给呼叫会话控制功能设备。 用户定位功能设备可以按照预定的优先级在状态为可用的归属用户服务 器中选择可用归属用户服务器。 用户定位功能设备可以轮流地在状态为可用的归属用户服务器中选择可 用归属用户服务器。 用户定位功能设备可以随机地在状态为可用的归属用户服务器中选择可 用归属用户服务器。 参照图 2 , 根据本发明的自动选择归属用户服务器的 IP多媒体子系统 10 包括： 多个归属用户服务器 20; 呼叫会话控制功能设备 30, 用于向用户定位 功能设备 40查询归属用户服务器 20信息； 状态查询接口 50, 分别设置在用户 定位功能设备 40与多个归属用户服务器 20之间； 用户定位功能设备 40 , 用于 按照预定定时通过状态查询接口 50查询多个归属用户月良务器 20的状态， 并更 新记录， 以及用于当呼叫会话控制功能设备 30向用户定位功能设备 40查询归 属用户服务器 20信息时， 根据所记录的多个归属用户服务器 20的状态， 选择 一个可用归属用户服务器 20并返回其信息给呼叫会话控制功能设备 30。 在多个归属用户服务器 20之间通过同步或异步的方式进行数据复制。 用户定位功能设备 40用于向多个归属用户服务器 20发起状态查询请求， 并根据多个归属用户服务器 20的响应或无响应确定每个归属用户服务器 20的 状态。 如果归属用户服务器 20响应状态正常， 则用户定位功能设备 40将归属 用户月艮务器 20确定为可用， 如果归属用户服务器 20响应处于故障或在预定时 间内未响应， 则用户定位功能设备 40将归属用户月良务器 20确定为不可用。 可选地， 用户定位功能设备 40用于按照预定的优先级在状态为可用的归 属用户服务器 20中选择可用归属用户服务器 20。 可选地， 用户定位功能设备 40用于轮流地在 态为可用的归属用户月 务器 20 中选择可用归属用户月艮务器 20。 可选地， 用户定位功能设备 40 用于随机地在状态为可用的归属用户服务 器 20中选择可用归属用户服务器 20。 本发明涉及 IP多媒体子系统实现 HSS 自动容灾切换的方法。 从前面的描述可以看到网络中存在多个 HSS的情况下， SLF承担了 HSS 的选择功能， 因此可以在 SLF增加 HSS容灾的配置信息， 实现一个 HSS出现 故障， 使用其对应的容灾 HSS继续提供服务。 本发明对现有系统主要有两点改进： 3) If you configure the HSS information corresponding to the user's PVI/PUI, look it up based on this. Because the HSS stores the user's subscription information and location information, if the HSS is damaged, such as an earthquake or a fire, the entire HSS is damaged, the registration and call services of the user belonging to the HSS cannot be implemented, so the HSS needs to be considered. Disaster tolerance issues. The implementation definition of HSS disaster tolerance is not given in the current protocol specification. When the HSS fails and the service cannot be processed normally, the SLF does not know the actual status of the HSS and still returns the information of the failed HSS to the CSCF. Therefore, there is a need for a solution for implementing automatic switching of HSS disaster tolerance in an IP multimedia subsystem to solve the above problems. SUMMARY OF THE INVENTION A primary object of the present invention is to provide an automatic selection method and system for a home subscriber server, which is used to provide an HSS disaster recovery automatic handover implementation method, which is used to automatically replace a disaster recovery backup HSS when an HSS failure occurs. It provides services that ensure that CSCF queries and downloads continue. In order to achieve the above object, according to a first aspect of the present invention, the present invention provides an automatic selection method of a home subscriber server of an IP multimedia subsystem. The automatic selection method of the home subscriber server includes the following steps: Step S102: respectively set an interface between the user positioning function device and the plurality of home subscriber servers; Step S104: The user positioning function device queries multiple home subscriber servers through the interface according to a predetermined timing. And updating the record; step S106, when the call session control function device queries the user location function device for the home user server information, the user location function device selects an available home user server according to the recorded status of the plurality of home user servers. Return its information to the call session control function device. Data replication is performed synchronously or asynchronously between multiple home subscriber servers. In step S104, the user positioning function device initiates a status query request to the plurality of home user servers, and determines the status of each home user server according to the response or non-response of the plurality of home user servers. In step S104, if the home server response status is normal, the user positioning function device determines that the home user server is available, and if the home user server response is in a failure or does not respond within a predetermined time, the user positioning function device will The home subscriber server is determined to be unavailable. In step S106, the user location function device may select an available home user server in the state-of-available home subscriber server according to a predetermined priority. In step S106, the user location function device may alternately select an available home subscriber server among the home subscriber servers whose status is available. In step S106, the user location function device may randomly select an available home subscriber server among the home subscriber servers whose status is available. In order to achieve the above object, according to a second aspect of the present invention, the present invention provides an IP multimedia subsystem that automatically selects a home subscriber server. The IP multimedia subsystem includes: a plurality of home subscriber servers; a call session control function device, configured to query the user location function device for the home subscriber server information; the state query interface is respectively set between the user location function device and the plurality of home subscriber servers The user positioning function device is configured to query the status of the plurality of home users by using the status query interface according to the predetermined timing, and update the record, and is used for querying the home user server by the call session control function device to the user positioning function device. In the information, according to the recorded status of the plurality of home subscriber servers, an available home subscriber server is selected and its information is returned to the call session control function device. Data replication is performed synchronously or asynchronously between multiple home subscriber servers. The user positioning function device is configured to initiate a status query request to multiple home user servers, and determine the status of each home user server according to the response or non-response of multiple home user servers. If the home subscriber server response status is normal, the subscriber location function device determines that the home subscriber server is available. If the home subscriber response is faulty or does not respond within a predetermined time, the subscriber location function device determines the home subscriber server as unavailable. Optionally, the user location function device is configured to select an available home subscriber server among the home subscriber servers whose status is available according to a predetermined priority. Optionally, the user location function device is configured to alternately select an available home subscriber server among the home subscriber servers whose status is available. Optionally, the user location function device is configured to randomly select an available home subscriber server among the home subscribers whose status is available. Through the above technical solution, the present invention realizes that when an HSS fails, the SLF can be identified in time, and the access path of the CSCF can be automatically switched through the SLF side to the disaster recovery backup HSS corresponding to the faulty HSS, thereby ensuring the correctness of the service. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in, are The illustrative embodiments of the present invention and the description thereof are intended to explain the present invention and are not intended to limit the invention. In the drawings: FIG. 1 is a flow chart of an automatic selection method of a home subscriber server according to the present invention; FIG. 2 is a block diagram of an IP multimedia subsystem for automatically selecting a home subscriber server according to the present invention; 4 is a schematic diagram of an improved architecture in accordance with an embodiment of the present invention; FIG. 5 is a flow diagram of a CSCF and SLF interaction flow in the prior art; FIG. 6 is an improved HSS state detection according to an embodiment of the present invention. Flowchart of the Flow; Figure 7 is a flow diagram of an improved CSCF and SLF interaction flow in accordance with an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. Referring to FIG. 1, an automatic selection method of a home subscriber server of an IP multimedia subsystem according to the present invention includes the following steps: Step S102: Set a connection σ between a user location function device and a plurality of home subscriber servers, respectively. Data replication is performed synchronously or asynchronously between multiple home subscriber servers. Step S104: The user positioning function device queries the status of the plurality of home subscriber servers through the interface according to the predetermined timing, and updates the record. The user positioning function device initiates a status query request to the plurality of home user servers, and determines the status of each home user server according to the response or non-response of the plurality of home server servers. If the home subscriber server response status is normal, the subscriber location function device determines that the home subscriber server is available, and if the home subscriber server response is in a failure or does not respond within a predetermined time, the subscriber location function device determines the home subscriber server to be unavailable. Step S106, the call session control function device queries the user location function device to query the home user service. Select an available home subscriber server and return its information to the call session control function device. The user location function device can select an available home subscriber server among the available home subscriber servers in accordance with a predetermined priority. The user location function device can alternately select an available home subscriber server among the home subscriber servers whose status is available. The user location function device can randomly select an available home subscriber server among the home subscriber servers whose status is available. Referring to FIG. 2, the IP multimedia subsystem 10 for automatically selecting a home subscriber server according to the present invention includes: a plurality of home subscriber servers 20; a call session control function device 30, configured to query the subscriber location function device 40 for the home subscriber server 20 information; The status query interface 50 is respectively disposed between the user location function device 40 and the plurality of home user servers 20; the user location function device 40 is configured to query the plurality of home user servers 20 through the status query interface 50 according to a predetermined timing. The status, and the update record, and when the call session control function device 30 queries the user location function device 40 for the home subscriber server 20 information, selects an available home subscriber server 20 based on the recorded status of the plurality of home subscriber servers 20. And return its information to the call session control function device 30. Data replication is performed between multiple home subscriber servers 20 in a synchronous or asynchronous manner. The user location function device 40 is configured to initiate a status query request to the plurality of home user servers 20, and determine the status of each home user server 20 based on the response or non-response of the plurality of home user servers 20. If the home subscriber server 20 responds to a normal state, the subscriber location function device 40 determines that the home subscriber server 20 is available. If the home subscriber server 20 responds to a failure or does not respond within a predetermined time, the subscriber location function device 40 will The home subscriber server 20 is determined to be unavailable. Optionally, the user location function device 40 is configured to select the available home subscriber server 20 in the home subscriber server 20 whose status is available according to a predetermined priority. Optionally, the user location function device 40 is configured to select the available home subscribers 20 in turn in the home subscribers 20 that are available. Optionally, the user location function device 40 is configured to randomly select the available home subscriber server 20 among the home subscriber servers 20 whose status is available. The invention relates to a method for implementing automatic disaster recovery switching of an HSS by an IP multimedia subsystem. From the previous description, you can see that there are multiple HSSs in the network. The SLF assumes the HSS selection function. Therefore, you can increase the HSS disaster recovery configuration information on the SLF to implement an HSS fault and use its corresponding disaster recovery HSS. Continue to provide services. The present invention has two major improvements to existing systems:
1 ) 在 SLF和 HSS之间增加接口， 用于 SLF定时查询 HSS的状态。 1) Add an interface between the SLF and the HSS for the SLF to periodically query the status of the HSS.
2 )在 SLF内部增加 HSS选择算法， SLF可以从一组 HSS中选择一个 HSS 返回其地址信息给 CSCF。 下面结合附图和具体实施方式对本发明作进一步详细说明。 实现方法， 包括以下步骤： 2) Add an HSS selection algorithm inside the SLF. The SLF can select one HSS from a group of HSSs to return its address information to the CSCF. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. The implementation method includes the following steps:
( 1 )在多个 HSS间通过同步或者异步的方式实现数据复制， 保证用户签 约信息和位置信息的一致， 这些 HSS可称为一个 HSS组。 (1) Data replication is implemented in a synchronous or asynchronous manner among multiple HSSs to ensure that the user's subscription information and location information are consistent. These HSSs may be referred to as an HSS group.
( 2 ) 在 SLF中为属于同一个 HSS组的 HSS规划访问优先级 (此处仅列 举了一种 HSS选择方法， 也可以是轮选或随机选择等）， 比如 SLF在按照电话 号码段配置归属 HSS信息时， 就可以如下配置：
( 3 ) SLF定时向本 SLF中配置的所有 HSS发起状态检测流程， ^据状 态检测的结果， 将 HSS标识为是否可用， 如图 6所示。 (3) The SLF periodically initiates a state detection process to all HSSs configured in the SLF. According to the result of the state detection, the HSS is identified as available, as shown in FIG. 6.
( 4 ) 当 CSCF到 SLF查询用户归属的 HSS信息时， 会提供用户的号码， 比 如 8613958057777 。 SLF 判 断 该 用 户 的 号 码 落 在 号 码 段 8613958060000~8613958069999之间。 SLF再判断 HSS1 当前是否可用， 如果 HSS1可用， 则返回 HSS1的地址信息给 CSCF。 如果 HSS1不可用， 继续判断 有无其他的可用节点， 比如 HSS2和 HSS3 , 如果有可用的节点则选择并返回 给 CSCF。 图 3是 IMS的现有体系构架， IMS包括查询呼叫会话控制功能（I-CSCF , Interrogating Call Session Control Function ), ^弋理呼叫会话控制功能 ( P-CSCF, Proxy Call Session Control Function )、服务呼叫会话控制功能、归属用户服务器、 用户定位功能。 这个框架同时提供与 PSTN/PLMN (公共交换电话网 /公共陆地 移动网, Public Switched Telephone Network I Public Land Mobile Network )和其 他 IP多媒体网络的互通。 本发明重点关注 SLF和 HSS之间的关系。 图 4是对现有体系结构的扩展， 增加了 SLF和 HSS的状态检测接口 , 通 过此接口 SLF可以知道当前配置的 HSS是否可用， 作为后续发起 HSS容灾切 换的判断依据。 该接口实现流程包括以下步骤， 如图 6所示： 步骤 401 , SLF定时向本 SLF中配置的所有 HSS发起状态查询请求； 步骤 402 , HSS收到 SLF的状态查询请求后， 返回本 HSS当前运行状态； SLF判断 HSS返回的状态查询结果， 如果 HSS反馈本 HSS处于故障， 则 SLF ^！夸该 HSS标识为不可用； 如果 HSS在规定的时间内未返回响应， 则 SLF主动 4夺该 HSS标识为不可用。 图 5是现有技术中 CSCF向 SLF查询用户归属的 HSS流程， 包括以下步 骤： 步骤 301 , CSCF收到业务请求， 可能是用户注册， 也可能是呼叫请求； 步骤 302 , CSCF完成业务控制判断； 步骤 303 , CSCF向 SLF发起请求， 查询用户归属的 HSS信息； 步骤 304 , SLF根据请求消息中用户信息， 比如用户电话号码查找配置的 HSS信息； 并返回给 CSCF; 步據 305 , CSCF向从 SLF查询得到的 HSS地址发请求， 继续业务处理。 图 7是本发明中对 CSCF向 SLF查询用户归属的 HSS流程的改进， 描述 了 SLF内部增加流程， 选择一个可用的 HSS , 并返回给 CSCF。 包括以下步驟。 步骤 501 , CSCF收到业务请求， 可能是用户注册， 也可能是呼叫请求； 步骤 502， CSCF完成业务控制判断； 步骤 503 , CSCF向 SLF发起请求， 查询用户归属的 HSS信息； 步骤 504, SLF根据请求消息中用户信息， 比如用户电话号码查找配置的 HSS组信息， 并从中选择一个可用的 HSS返回给 CSCF; 步骤 505 , CSCF向从 SLF查询得到的 HSS地址发请求， 继续业务处理。 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。 凡在本发明的精神和原则 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。 (4) When the CSCF to the SLF queries the HSS information to which the user belongs, the user's number is provided, for example, 8613958057777. The SLF judges that the number of the user falls between the number segments 8613958060000~8613958069999. The SLF then determines whether HSS1 is currently available. If HSS1 is available, it returns the address information of HSS1 to the CSCF. If HSS1 is not available, continue to determine if there are other available nodes, such as HSS2 and HSS3, and if there are available nodes, select and return to CSCF. FIG. 3 is an existing architecture of the IMS, and the IMS includes an Inter-Calling Session Control Function (I-CSCF), a Pro-Call Session Control Function (P-CSCF), and a service call. Session control function, home user server, User location feature. This framework also provides interworking with PSTN/PLMN (Public Switched Telephone Network I Public Land Mobile Network) and other IP multimedia networks. The present invention focuses on the relationship between SLF and HSS. Figure 4 is an extension of the existing architecture. The status detection interface of the SLF and the HSS is added. The SLF can be used to determine whether the current HSS is available. The interface implementation process includes the following steps, as shown in FIG. 6: Step 401: The SLF periodically initiates a status query request to all HSSs configured in the SLF. Step 402: After receiving the status query request of the SLF, the HSS returns to the current running of the HSS. Status; SLF judges the status query result returned by HSS. If HSS feedback this HSS is faulty, then SLF ^! The HSS flag is not available; if the HSS does not return a response within the specified time, the SLF actively takes the HSS flag as unavailable. FIG. 5 is a flow chart of the HSCS for querying the user's home to the SLF in the prior art, including the following steps: Step 301: The CSCF receives a service request, which may be a user registration or a call request. Step 302: The CSCF completes the service control judgment. Step 303: The CSCF initiates a request to the SLF to query the HSS information to which the user belongs. Step 304: The SLF searches for the configured HSS information according to the user information in the request message, such as the user phone number, and returns the information to the CSCF. Step 305, CSCF to the slave SLF The HSS address obtained by the query is sent to the request, and the service processing is continued. FIG. 7 is an improvement of the HSS process for querying the user ownership of the CSCF from the CSCF in the present invention, describes the internal flow of the SLF, selects an available HSS, and returns it to the CSCF. Includes the following steps. Step 501: The CSCF receives the service request, which may be a user registration or a call request. Step 502: The CSCF completes the service control judgment. Step 503: The CSCF initiates a request to the SLF to query the HSS information to which the user belongs. Step 504: The SLF searches for the configured HSS group information according to the user information in the request message, such as the user's phone number, and selects an available HSS to return to the CSCF. Step 505: The CSCF sends a request to the HSS address obtained from the SLF query to continue the service. deal with. 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 spirit and scope of the present invention are intended to be included within the scope of the present invention.
Claims
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| CN200610152802.XA CN101090568A (en) | 2006-10-18 | 2006-10-18 | IP multimedium subsystem of automatic selecting attaching user server |
| CN200610152802.X | 2006-10-18 |
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| WO2011064492A1 (en) * | 2009-11-27 | 2011-06-03 | France Telecom | Method for switching a primary hss on a backup hss in an ip network |
| WO2015135486A1 (en) * | 2014-03-13 | 2015-09-17 | 电信科学技术研究院 | Selection of positioning method, and control method and apparatus for same |
| CN105049230A (en) * | 2015-06-15 | 2015-11-11 | 中兴国通通讯装备技术（北京）有限公司 | Vehicle disaster recovery method for distributed multimedia sub-system based on domain name system and vehicle disaster recovery system thereof |
| US12407739B2 (en) | 2022-10-07 | 2025-09-02 | T-Mobile Usa, Inc. | Interconnection border control function and home subscriber server interface for managing voice calls |
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| CN101459533B (en) * | 2008-04-16 | 2011-10-26 | 中兴通讯股份有限公司 | System and method for improved application server disaster tolerance in next generation network |
| CN102487495B (en) * | 2010-12-02 | 2015-05-20 | 中兴通讯股份有限公司 | Method and CSCF (Call Session Control Function) for realizing calling when HSS (Home Subscriber Server) is abnormal |
| CN102624731B (en) * | 2012-03-13 | 2014-11-05 | 华为技术有限公司 | Call processing method, system and server |
| CN103593369B (en) * | 2012-08-16 | 2017-02-08 | 成都鼎桥通信技术有限公司 | Inquiry and update method and processing system of HSS (home subscriber server) data |
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| WO2011064492A1 (en) * | 2009-11-27 | 2011-06-03 | France Telecom | Method for switching a primary hss on a backup hss in an ip network |
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| WO2015135486A1 (en) * | 2014-03-13 | 2015-09-17 | 电信科学技术研究院 | Selection of positioning method, and control method and apparatus for same |
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| CN101090568A (en) | 2007-12-19 |
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