WO2011023055A1 - 呼叫控制方法和呼叫控制装置 - Google Patents

呼叫控制方法和呼叫控制装置 Download PDF

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Publication number
WO2011023055A1
WO2011023055A1 PCT/CN2010/075619 CN2010075619W WO2011023055A1 WO 2011023055 A1 WO2011023055 A1 WO 2011023055A1 CN 2010075619 W CN2010075619 W CN 2010075619W WO 2011023055 A1 WO2011023055 A1 WO 2011023055A1
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WIPO (PCT)
Prior art keywords
called party
call control
call
identity
control device
Prior art date
Application number
PCT/CN2010/075619
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English (en)
French (fr)
Inventor
任慧鹏
成葵交
陈亮
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112012004271-8A priority Critical patent/BR112012004271B1/pt
Priority to RU2012111595/08A priority patent/RU2524842C2/ru
Publication of WO2011023055A1 publication Critical patent/WO2011023055A1/zh

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Classifications

    • 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
    • H04L65/1046—Call controllers; Call servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1453—Methods or systems for payment or settlement of the charges for data transmission involving significant interaction with the data transmission network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • 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]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a call control method and a call control apparatus.
  • IMS IP Multimedia Subsystem
  • 3rd 3rd Generation Partnership Project
  • IP internet protocol
  • P-CSCF Proxy Call Session Control Function
  • I-CSCF Interrogating CSCF
  • Server Serving Call Session Control Function Entity
  • the S-CSCF is in the core control position of the IMS core network, responsible for registration authentication and session control of the UE, performing basic session routing functions for the calling party and the called party IMS user, and according to the IMS triggering rule signed by the user.
  • Bay U when the conditions are met, the value-added service route triggering and service control interaction to the AS is performed.
  • the I-CSCF is the gateway node of the IMS, providing local user service node assignment, routing query, and IMS inter-domain topology hiding.
  • the P-CSCF is the connection point with the user in the IMS. It provides the proxy function, that is, accepts the service request (INVITE) and forwards it, but cannot modify the Request URI field in the INVITE message.
  • the P-CSCF can also provide the user agent (UA). ) Function, which interrupts and generates SIP sessions independently under abnormal conditions.
  • the prior art proposes to replace the P-CSCF by using an Access Gateway Control Function (AGCF) and an Access Gateway (AG).
  • AGCF Access Gateway Control Function
  • AG Access Gateway
  • S-CSCF service
  • IMS Core IMS core network
  • the existing call control procedure is that the AGCF or P-CSCF routes the user's call to the S-CSCF, by the S-CSCF. Call control is performed, so there is a problem that the pressure of the core network element is relatively large, and the number of signaling routes is relatively large.
  • the embodiment of the invention provides a call control method and a call control device, which can save the number of signaling routes and reduce the pressure of the core network element.
  • the call control device receives the session request sent by the calling party; the session request includes the identity of the called party; if the link between the call control device and the serving call session control function entity S-CSCF fails, The identity of the called party checks whether the called party is a user under the call control device, and if so, directly sends the session request to the called party to perform call connection.
  • the call control device receives the session request sent by the calling party; the session request includes the identity of the calling party and the identity of the called party;
  • the call control device checks, according to the identity of the calling party and the identity of the called party, whether the calling party and the called party belong to a member of the same group of the cluster service, and if so, directly The session request is sent to the called party for call connection.
  • a session request receiving unit configured to receive a session request sent by the calling party; the session request includes an identifier of the called party;
  • a call connection unit configured to: when the link between the call control device and the S-CSCF fails, check whether the called party is a user under the device according to the identity of the called party, If yes, the session request is directly sent to the called party for call connection.
  • a session request receiving unit configured to receive a session request sent by the calling party;
  • the session request includes an identity of the calling party and an identity of the called party;
  • a call connection unit configured to check, according to the identity of the calling party and the identity of the called party, whether the calling party and the called party belong to a member of the same group of the cluster service, and if so, directly
  • the session request is sent to the called party for call connection.
  • the call control device when the link between the call control device and the S-CSCF fails, the call control device directly forwards the call signaling.
  • the calling party and the called party belong to the same group of the cluster service. At the time, the call control device forwards the call signaling directly.
  • the number of routes can be reduced, and the pressure of the core network element can be alleviated.
  • FIG. 1 is a flowchart of a call control method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a call control method according to Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a third call control method according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of a fourth call control method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a fifth call control method according to Embodiment 5 of the present invention.
  • FIG. 6 is a schematic structural diagram of a call control apparatus according to Embodiment 6 of the present invention.
  • FIG. 7 is a schematic structural diagram of a call control apparatus according to Embodiment 7 of the present invention.
  • FIG. 8 is a schematic structural diagram of a call control apparatus according to Embodiment 8 of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • Embodiments of the present invention provide a call control method and a call control apparatus. The details are described below separately.
  • Embodiment 1 A call control method, which is shown in FIG. 1 and includes:
  • the call control apparatus receives a session request sent by the calling party, where the session request includes an identity identifier of the called party.
  • A2 if the link between the call control device and the S-CSCF fails, check whether the called party is a user under the call control device according to the identity of the called party, and if so, directly The session request is sent to the called party for call connection.
  • the call control apparatus checks whether the called party is a user belonging to the device, and may It is checked whether the called party identity is implemented in a local user list. If the called party is not the user to whom the call control device belongs, the call control device may return a connection failure response to the calling party.
  • the call control device may include a P-CSCF or an AGCF.
  • the link with the S-CSCF fails, including the S-CSCF failure, or the link between the P-CSCF or AGCF and the S-CSCF.
  • the call control device when the link between the call control device and the S-CSCF fails, the call control device directly forwards the call signaling to implement a call between local users, and to a certain extent keeps the local user when the fault occurs.
  • the communication improves the anti-fault of the network and the processing capability of the emergency communication.
  • the session is directly established by the call control device, which can reduce the number of routes and reduce the pressure on the core network element.
  • a call control method includes:
  • the P-CSCF receives the session request sent by the calling party; the session request includes the identity of the called party; B2, if the link between the P-CSCF and the S-CSCF fails, the P-CSCF according to the The identity of the called party checks whether the called party is a user that belongs to the P-CSCF, and if so, directly sends the session request to the called party for call connection.
  • the P-CSCF may check, according to the identity of the called party, whether the called party is a user that belongs to the P-CSCF, and may perform multiple manners, such as checking the called party. Whether the identity is in the local user list. In the list, the called party is a local user, not in the list, indicating that the called party is not a user managed by the P-CSCF. It can be understood that the P-CSCF can save the identity of the user of its proxy during the user's registration or location update. It can be understood that the user identity may also be an IP address of the user, and the P-CSCF may further determine, according to the IP address segment of the user, whether the called party user is a user managed by the P-CSCF.
  • the P-CSCF can detect the link between the P-CSCF and the S-CSCF, and the detection manner can adopt various existing methods, such as adopting a "request-response” mechanism, or adopting synchronization.
  • the mechanism of the clock or the way of sending a "Ping-response packet", the specific response mode can also take an unintended way, such as when one or several times of communication failure with the C-CSCF occurs, the link is considered faulty, and the fault is When recovering, you can use the above fault detection method, which is not described here.
  • the method further includes: if the called party is not the user that belongs to the P-CSCF, the P-CSCF returns a connection failure response to the calling party to notify the calling party that the connection fails.
  • the P-CSCF when the link between the P-CSCF and the S-CSCF fails, the P-CSCF directly forwards the call signaling to implement a call between local users, and maintains the local user when the fault occurs to a certain extent.
  • the communication improves the anti-fault of the network and the processing capability of the emergency communication.
  • the P-CSCF is directly established. Sessions can reduce the number of routes and reduce the pressure on the core network element I-CSCF/S-CSCF.
  • Embodiment 3 A call control method, which is shown in FIG. 3, includes:
  • the AGCF receives the session request sent by the calling party; the session request includes the identity of the called party; C2, if the link between the AGCF and the S-CSCF fails, the AGCF according to the identity of the called party Checking whether the called party is a user belonging to the AGCF, and if yes, directly sending the session request to the called party for call connection.
  • the AGCF checks whether the called party is a user that belongs to the AGCF according to the identity of the called party, and may perform multiple manners, such as checking whether the called party identity is checked.
  • a list of local users In the list, the called party is a local user, not in the list, indicating that the called party is not a user managed by AGCF.
  • the AGCF may save the identity of the user of its agent during the user's registration or location update.
  • the user identity may also be an IP address of the user, and the AGCF may also determine, according to the IP address segment of the user, whether the called party user is a user managed by the AGCF.
  • the AGCF may detect the link between the AGCF and the S-CSCF, and the manner of detecting may adopt various existing methods, such as adopting a "request-response” mechanism, or adopting a synchronous clock mechanism or By sending a "Ping-Response Packet", the specific response method can also take an unintended way. For example, when one or several times of communication failure with the C-CSCF occurs, the link is considered to be faulty.
  • the above fault detection method can be used, and is not described here.
  • the AGCF when the link between the AGCF and the S-CSCF fails, the AGCF directly forwards the call signaling to implement a call between local users, and to some extent, maintains communication of the local user when the fault occurs, and improves The network's anti-fault and emergency communication processing capabilities.
  • the session is directly established by the AGCF, which reduces the number of routes and reduces the pressure on the core network element.
  • Embodiment 4 A call control method, which is shown in FIG. 4, includes:
  • the AGCF receives the session request sent by the AG where the calling party is located;
  • the session request sent by the calling party is sent to an access gateway (AG), and the access gateway encapsulates the session request into H.248 protocol, and sends the encapsulated session request to the AGCF.
  • AG access gateway
  • step D2 if the link between the AGCF and the S-CSCF fails, the AGCF checks whether the called party is a user belonging to the AGCF according to the identity of the called party; if yes, proceed to step D3. If no, continue to step D4;
  • the AGCF may search for an AG serving the called party user according to the identity of the called party user, and then send the session request to the called party by using the obtained AG;
  • the correspondence between the identity of the user and the AG may be saved in the AGCF, according to the called party user.
  • the identity lookup is obtained by the AG serving the user.
  • the AGCF sends the received session invitation encapsulated by the H.248 protocol to the searched AG, and the AG forwards the call to the called party.
  • the calling party user and the called party user may be users of the same AG service, or may be users of different AG services. If it is the user of the same AG service, the AGCF no longer needs to find the AG serving the user according to the identity of the called party user.
  • connection failure response is sent to the calling party by the AG where the calling party is located.
  • the AGCF generates a connection response failure message of the H.248 protocol, and sends the message to the AG of the calling party, and the AG of the calling party forwards the connection failure response to the calling party.
  • the AGCF when the link between the AGCF and the S-CSCF fails, the AGCF directly forwards the call signaling to implement the call between the local users, and maintains the communication of the local user when the fault occurs to a certain extent.
  • the session is directly established by the AGCF, which reduces the number of routes and reduces the pressure on the core network element.
  • Embodiment 5 A call control method, which is shown in FIG. 5, includes:
  • the call control device receives the session request sent by the calling party;
  • the session request includes the identity of the calling party and the identity of the called party;
  • the call control device checks, according to the identity of the calling party and the identity of the called party, whether the calling party and the called party belong to a member of the same group of the cluster service, if , then proceed to step E3; if not, proceed to step E4;
  • the call control apparatus may be a P-CSCF or an AGCF. If the call control apparatus is an AGCF, the call request of the calling party received by the call control apparatus is reversed by the AG of the AGCF. And signaling format conversion.
  • the cluster service may be a short-number service or the like, and the cluster service is characterized by no real-time charging: for the user who subscribes to the same cluster, the communication fee between the users is calculated by using a monthly subscription. The way of the fee, so there is no need to trigger the service to the core network for charging control.
  • the called party when a special service is signed between the calling party user and the called party user, if the real-time charging control is not needed, the called party can be connected by the P-CSCF or the AGCF, simplifying the call flow, and saving control. Signaling, reducing the burden on the core network.
  • Embodiment 6 is a call control apparatus.
  • the flowchart is as shown in FIG. 6, and includes:
  • the session request receiving unit 510 is configured to receive a session request sent by the calling party, where the session request includes an identifier of the called party.
  • the call connection unit 520 is configured to check, according to the identity of the called party received by the session request receiving unit 510, when the link between the call control device and the S-CSCF is faulty, check whether the called party is The user to whom the call control device belongs, if yes, directly sends the session request to the called party to perform call connection.
  • the call control apparatus provided by the embodiment of the present invention can be integrated with an existing P-CSCF or AGCF to implement the call control function of the local user.
  • Embodiment 7 A call control apparatus, which is shown in FIG. 7 and includes:
  • the session request receiving unit 610 is configured to receive a session request sent by the calling party, where the session request includes an identifier of the called party.
  • the call connection unit 620 is configured to check, according to the identity of the called party received by the session request receiving unit 610, when the link between the call control device and the S-CSCF is faulty, whether the called party is the The user to whom the call control device belongs, if yes, directly sends the session request to the called party to perform call connection.
  • the call connection unit 620 can include:
  • the checking unit 621 is configured to check, according to the identity of the called party received by the session request receiving unit, whether the called party is a user to which the call control device belongs;
  • a continuation unit 622 configured to acquire an AG where the called party is located according to the called party identity, when the check result of the checking unit 621 is that the user is a user to which the call control device belongs, and The session invitation is sent to the called party through the AG.
  • the call control apparatus provided by the embodiment of the present invention can be integrated with the existing AGCF to implement call control for local users.
  • the call control apparatus provided in the sixth embodiment and the seventh embodiment of the present invention can directly forward the call signaling to implement the call between the local users when the link between the call control apparatus and the S-CSCF is faulty, to a certain extent.
  • the local user's communication is maintained when the fault occurs, which improves the network's anti-fault and emergency communication processing capabilities.
  • the session is directly established by the call control device, which reduces the number of routes and reduces the pressure of the core network element.
  • Embodiment 8 A call control apparatus, a schematic structural diagram is shown in FIG. 8, and includes:
  • the session request receiving unit 710 is configured to receive a session request sent by the calling party, where the session request includes an identity of the calling party and an identity of the called party.
  • the call connection unit 720 is configured to check, according to the identity of the calling party and the identity of the called party, whether the calling party and the called party belong to a member of the same group of the cluster service, and if yes, Send the session request directly Send the called party a call to connect.
  • the call control apparatus provided in Embodiment 8 of the present invention may include: a P-CSCF or an AGCF, which subscribes a special service between the calling party user and the called party user, and if no real-time charging control is required, then the P- The CSCF or AGCF connects the called party, simplifying the call flow, saving control signaling, and reducing the burden on the core network.
  • the call control method and the call control apparatus provided by the embodiments of the present invention are described in detail above, wherein: when the link between the call control apparatus and the S-CSCF fails, the call control apparatus directly forwards the call signaling to implement local user
  • the call between the local users keeps the communication of the local user when the fault occurs to a certain extent, and improves the anti-fault of the network and the processing capability of the emergency communication.
  • the session is directly established by the call control device, and the number of routes can be reduced. , alleviate the pressure on the core network elements.
  • Special services are signed between the calling party and the called party. If real-time charging control is not required, the called party can be connected by the P-CSCF or AGCF to simplify the call flow, save control signaling, and reduce the core. The burden of the net.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Environmental & Geological Engineering (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
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Abstract

本发明公开了呼叫控制方法和呼叫控制装置。本发明实施例中，当呼叫控制装置与S-CSCF的链路发生故障时，呼叫控制装置直接转发呼叫信令。在本发明另一实施例中，主叫方和被叫方属于集群业务的同一群组的成员时，呼叫控制装置直接转发呼叫信令。通过本发明实施例，可以减少路由次数，减轻核心网网元的压力。

Description

呼叫控制方法和呼叫控制装置 本申请要求于 2009年 08月 27日提交中国专利局、 申请号为 200910171250. 0、发明 名称为 "呼叫控制方法和呼叫控制装置" 的中国专利申请的优先权， 其全部内容通过引用 结合在本申请中。
技术领域 本发明涉及通信技术领域， 具体涉及呼叫控制方法和呼叫控制装置。 背景技术 IP 多媒体子系统 （IP Multimedia Subsystem, IMS ) 是第三代合作伙伴计划 （3rd
Generation Partnership Project, 3 GPP) 在版本 5 (R5 ) 阶段增加的核心网络中的一个子系 统， 以会话初始协议 （Session Initiation Protocol, SIP) 协议为基础， 是一个融合数据、 语 音和网际协议 （Internet Protocol, IP) 网络的开放体系， 通过全 IP业务的网络架构提供丰 富的多媒体业务和应用。IMS网络定义了三个路由实体，代理呼叫会话控制功能实体 (Proxy Call Session Control Function, P-CSCF)、 查询呼叫会话控制功能实体 (Interrogating CSCF, I-CSCF), 服务呼叫会话控制功能实体 （Serving CSCF, S-CSCF)。
S-CSCF在 IMS核心网中处于核心的控制地位， 负责对 UE的注册鉴权和会话控制， 执行针对主叫方及被叫方 IMS用户的基本会话路由功能， 并根据用户签约的 IMS触发规 贝 U， 在条件满足时进行到 AS的增值业务路由触发及业务控制交互。
I-CSCF是 IMS的关口节点， 提供本域用户服务节点分配、路由査询以及 IMS域间拓 扑隐藏功能。
P-CSCF是 IMS中与用户的连接点，提供代理 (Proxy)功能，即接受业务请求（INVITE) 并转发，但不能修改 INVITE消息中的 Request URI字段； P-CSCF也可提供用户代理（UA) 功能， 即在异常情况下中断和独立产生 SIP会话。
再考虑到固定传统网络向 IMS演进的场景时， 现有技术中提出了通过接入网关控制 器 (Access Gateway Control Function, AGCF)和接入网关 （Access Gateway, AG), 来代替 P-CSCF, 以实现传统网络和 IMS网络的融合， AGCF对 AG进行控制， 提供网关管理， 同 时通过 SIP协议与服务 （S-CSCF) 对接， 通过 IMS核心网 （IMS Core) 为用户提供业务。
现有的呼叫控制过程是 AGCF或 P-CSCF将用户的呼叫路由到 S-CSCF, 由 S-CSCF 进行呼叫控制， 因此存在核心网网元的压力比较大， 而且信令路由次数比较多的问题。 发明内容
本发明实施例提供呼叫控制方法和呼叫控制装置， 可以节约信令的路由次数， 减少核 心网网元的压力。
本发明实施例提供的一种呼叫控制方法， 包括：
呼叫控制装置接收主叫方发送的会话请求； 所述会话请求中包含被叫方的身份标识； 若所述呼叫控制装置与服务呼叫会话控制功能实体 S-CSCF的链路发生故障， 则根据 所述被叫方的身份标识检查所述被叫方是否是所述呼叫控制装置下所属的用户， 若是则直 接将所述会话请求发送给被叫方进行呼叫接续。
本发明实施例提供的一种呼叫控制方法， 包括：
呼叫控制装置接收主叫方发送的会话请求；所述会话请求中包含主叫方的身份标识和 被叫方的身份标识；
所述呼叫控制装置根据所述主叫方的身份标识和被叫方的身份标识检査所述主叫方 和所述被叫方是否属于集群业务的同一群组的成员， 若是， 则直接将所述会话请求发送给 被叫方进行呼叫接续。
本发明实施例提供的一种呼叫控制装置， 包括：
会话请求接收单元， 用于接收主叫方发送的会话请求； 所述会话请求中包含被叫方的 身份标识；
呼叫接续单元， 用于在所述呼叫控制装置与 S-CSCF的链路发生故障时， 则根据所述 被叫方的身份标识检査所述被叫方是否是所述装置下所属的用户， 若是则直接将所述会话 请求发送给被叫方进行呼叫接续。
本发明实施例提供的一种呼叫控制装置， 包括：
会话请求接收单元， 用于接收主叫方发送的会话请求； 所述会话请求中包含主叫方的 身份标识和被叫方的身份标识；
呼叫接续单元，用于根据所述主叫方的身份标识和被叫方的身份标识检査所述主叫方 和所述被叫方是否属于集群业务的同一群组的成员， 若是， 则直接将所述会话请求发送给 被叫方进行呼叫接续。
本发明实施例中， 当呼叫控制装置与 S-CSCF的链路发生故障时， 呼叫控制装置直接 转发呼叫信令。 在本发明另一实施例中， 主叫方和被叫方属于集群业务的同一群组的成员 时， 呼叫控制装置直接转发呼叫信令。 通过本发明实施例， 可以减少路由次数， 减轻核心 网网元的压力。 附图说明 为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的 附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本 领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的 附图。
图 1是本发明实施例一呼叫控制方法的流程图；
图 2是本发明实施例二呼叫控制方法的流程图；
图 3是本发明实施例三呼叫控制方法的流程图；
图 4是本发明实施例四呼叫控制方法的流程图；
图 5是本发明实施例五呼叫控制方法的流程图；
图 6是本发明实施例六呼叫控制装置的结构示意图；
图 7是本发明实施例七呼叫控制装置的结构示意图
图 8是本发明实施例八呼叫控制装置的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地 描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本 发明中的实施例， 本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实 施例， 都属于本发明保护的范围。
本发明实施例提供呼叫控制方法和呼叫控制装置。 以下分别进行详细说明。
实施例一， 一种呼叫控制方法， 流程图如图 1所示， 包括：
A1 , 呼叫控制装置接收主叫方发送的会话请求； 所述会话请求中包含被叫方的身份 标识；
A2, 若所述呼叫控制装置与 S-CSCF的链路发生故障时， 则根据所述被叫方的身份标 识检查所述被叫方是否是所述呼叫控制装置下所属的用户， 若是则直接将所述会话请求发 送给被叫方进行呼叫接续。
本发明实施例中， 呼叫控制装置检查所述被叫方是否是所述装置下所属的用户，可以 采取检查所述被叫方身份标识是否在本地的用户列表中实现。 若所述被叫方不是所述呼叫 控制装置的下所属的用户， 则呼叫控制装置可以向所述主叫方返回接续失败响应。
具体实现时， 呼叫控制装置可以包括 P-CSCF或 AGCF。
与 S-CSCF链路发生故障， 包括 S-CSCF故障， 或者 P-CSCF或 AGCF与 S-CSCF之 间链路不通等。
本发明实施例一中， 当呼叫控制装置与 S-CSCF的链路发生故障时， 呼叫控制装置直 接转发呼叫信令， 实现本地用户之间的呼叫， 在一定程度上保持了故障发生时本地用户的 通信， 提高了网络的抗故障以及应急通信的处理能力， 同时本发明实施例中， 由呼叫控制 装置直接建立会话， 可以减少路由次数， 减轻核心网网元的压力。
下面以 P-CSCF、 AGCF分别作为呼叫控制装置， 对本发明方案进行描述： 实施例二、 一种呼叫控制方法， 流程图如图 2所示， 包括：
B l , P-CSCF接收主叫方发送的会话请求； 所述会话请求中包含被叫方的身份标识； B2, 若 P-CSCF与 S-CSCF的链路发生故障， 则 P-CSCF根据所述被叫方的身份标识 检查所述被叫方是否是所述 P-CSCF下所属的用户， 若是则直接将所述会话请求发送给被 叫方进行呼叫接续。
本实施例中， 所述 P-CSCF 根据所述被叫方的身份标识检查所述被叫方是否是所述 P-CSCF 下所属的用户可以采取多种方式， 如检査所述被叫方身份标识是否在本地的用户 列表。 在列表中， 则说明被叫方是本地用户， 不在列表中， 说明被叫方不是 P-CSCF管理 的用户。 可以理解， 在用户在网络注册或位置更新的过程中， P-CSCF 可以保存其代理的 用户的身份标识。 可以理解， 所述用户身份标识还可以是用户的 IP地址， 所述 P-CSCF还 可以根据用户的 IP地址段， 判断被叫方用户是否是本 P-CSCF管理的用户。
本发明实施例中， P-CSCF可以对 P-CSCF与 S-CSCF之间链路进行检测， 检测的方 式可以采取多种现有的方式， 如采用 "请求-响应"的机制， 或者采取同步时钟的机制或者 通过发送 "Ping-响应数据包" 的方式， 具体的响应方式还可以采取非刻意的方式， 如当发 生一次或几次与 C-CSCF通信失败， 则认为链路故障， 在故障恢复的时， 可以采用上述故 障检测方式， 不在赘述。
本实施例中，还可以包括：若所述被叫方不是所述 P-CSCF下所属的用户，则 P-CSCF 向所述主叫方返回接续失败响应， 以通知主叫方接续失败。
本发明实施例二中， 当 P-CSCF与 S-CSCF的链路发生故障时， P-CSCF直接转发呼 叫信令， 实现本地用户之间的呼叫， 在一定程度上保持了故障发生时本地用户的通信， 提 高了网络的抗故障以及应急通信的处理能力， 同时本发明实施例中， 由 P-CSCF直接建立 会话， 可以减少路由次数， 减轻核心网网元 I-CSCF/S-CSCF的压力。
实施例三、 一种呼叫控制方法， 流程图如图 3所示， 包括：
Cl， AGCF接收主叫方发送的会话请求； 所述会话请求中包含被叫方的身份标识； C2, 若 AGCF与 S-CSCF的链路发生故障， 则 AGCF根据所述被叫方的身份标识检 査所述被叫方是否是所述 AGCF下所属的用户，若是则直接将所述会话请求发送给被叫方 进行呼叫接续。
本实施例中， 所述 AGCF 根据所述被叫方的身份标识检査所述被叫方是否是所述 AGCF下所属的用户可以釆取多种方式， 如检查所述被叫方身份标识是否在本地的用户列 表。 在列表中， 则说明被叫方是本地用户， 不在列表中， 说明被叫方不是 AGCF管理的用 户。 可以理解， 在用户在网络注册或位置更新的过程中， AGCF可以保存其代理的用户的 身份标识。 可以理解， 所述用户身份标识还可以是用户的 IP地址， 所述 AGCF还可以根 据用户的 IP地址段， 判断被叫方用户是否是本 AGCF管理的用户。
本发明实施例中， AGCF可以对 AGCF与 S-CSCF之间链路进行检测， 检測的方式可 以采取多种现有的方式， 如采用 "请求-响应"的机制， 或者采取同步时钟的机制或者通过 发送 "Ping-响应数据包" 的方式， 具体的响应方式还可以釆取非刻意的方式， 如当发生一 次或几次与 C-CSCF通信失败， 则认为链路故障， 在故障恢复的时， 可以采用上述故障检 测方式， 不在赘述。
本发明实施例三中， 当 AGCF与 S-CSCF的链路发生故障时， AGCF直接转发呼叫信 令， 实现本地用户之间的呼叫， 在一定程度上保持了故障发生时本地用户的通信， 提高了 网络的抗故障以及应急通信的处理能力。 同时本发明实施例中， 由 AGCF直接建立会话， 可以减少路由次数， 减轻核心网网元的压力。
实施例四、 一种呼叫控制方法， 流程图如图 4所示， 包括：
Dl， AGCF接收主叫方所在的 AG发送的会话请求；
本实施例中， 主叫方发送的会话请求发送到接入网关 （Access Gateway, AG), 接入 网关将所述会话请求进行 H.248协议封装， 并将封装后的会话请求发送给所述 AGCF。
D2， 若 AGCF与 S-CSCF的链路发生故障， 则 AGCF根据所述被叫方的身份标识检 査所述被叫方是否是所述 AGCF下所属的用户； 若是， 则继续歩骤 D3， 若否， 则继续歩 骤 D4;
D3 , 所述 AGCF可以根据被叫方用户的身份标识查找得到为被叫方用户服务的 AG, 然后将所述会话请求通过所述查找得到的 AG发送给所述被叫方；
具体的，所述 AGCF中可以保存用户的身份标识和 AG的对应关系，根据被叫方用户 的身份标识査找得到为用户服务的 AG。
具体的，所述 AGCF将所述收到的通过 H.248协议封装的会话邀请发送给所述査找得 到的 AG, AG向被叫方转发。
在实际处理中， 主叫方用户和被叫方用户可以是同一个 AG服务的用户， 也可以是不 同 AG服务的用户。 假如是同一个 AG服务的用户， 则 AGCF不用再根据被叫方用户的身 份标识查找为用户服务的 AG。
D4， 向所述主叫方返回接续失败响应。 返回的接续失败响应通过主叫方所在 AG发 送给主叫方。 具体的， 所述 AGCF生成 H.248协议的接续响应失败消息， 并将该消息发送 给主叫方的 AG， 主叫方的 AG将所述接续失败响应向主叫方转发。
本发明实施例四中， 当 AGCF与 S-CSCF的链路发生故障时， AGCF直接转发呼叫信 令， 实现本地用户之间的呼叫， 在一定程度上保持了故障发生时本地用户的通信， 提高了 网络的抗故障以及应急通信的处理能力。 同时本发明实施例中， 由 AGCF直接建立会话， 可以减少路由次数， 减轻核心网网元的压力。
实施例五、 一种呼叫控制方法， 流程图如图 5所示， 包括：
El， 呼叫控制装置接收主叫方发送的会话请求；所述会话请求包含主叫方的身份标识 和被叫方的身份标识；
E2，所述呼叫控制装置根据所述主叫方的身份标识和所述被叫方的身份标识检査所述 主叫方和所述被叫方是否属于集群业务的同一群组的成员， 若是， 则继续步骤 E3; 若否， 则继续步骤 E4;
本实施例中， 所述呼叫控制装置可以是 P-CSCF 或 AGCF, 若所述呼叫控制装置是 AGCF, 则所述呼叫控制装置接收的主叫方的会话请求通过所述 AGCF下属的 AG进行中 转和信令格式转换。
本实施例中， 所述集群业务可以为短号业务等类似的业务， 集群业务的特点为无需实 时计费： 如对于签约进入同一集群内的用户， 用户之间的通信费用， 采取包月的计费的方 式， 因此没有必要将业务触发到核心网进行计费控制。
E3， 直接将所述会话请求发送给被叫方进行呼叫接续；
E4, 将所述呼叫请求向 S-CSCF转发。
本实施例中， 对于主叫方用户和被叫方用户之间签约了特殊的业务， 如无需实时计费 控制， 那么则可以由 P-CSCF或 AGCF接续被叫方， 简化呼叫流程， 节约控制信令， 减少 核心网的负担。
实施例六、 一种呼叫控制装置， 流程图如图 6所示， 包括： 会话请求接收单元 510， 用于接收主叫方发送的会话请求； 所述会话请求中包含被叫 方的身份标识；
呼叫接续单元 520， 用于在呼叫控制装置与 S-CSCF之间的链路发生故障时， 根据所 述会话请求接收单元 510接收的被叫方的身份标识检査所述被叫方是否是所述本呼叫控制 装置下所属的用户， 若是则直接将所述会话请求发送给被叫方进行呼叫接续。
本发明实施例提供的呼叫控制装置可以集成与现有的 P-CSCF或者 AGCF上，实现本 地用户的呼叫控制功能。
实施例七、 一种呼叫控制装置， 流程图如图 7所示， 包括：
会话请求接收单元 610， 用于接收主叫方发送的会话请求； 所述会话请求中包含被叫 方的身份标识；
呼叫接续单元 620， 用于在呼叫控制装置与 S-CSCF之间的链路发生故障时， 根据所 述会话请求接收单元 610接收的被叫方的身份标识检查所述被叫方是否是所述本呼叫控制 装置下所属的用户， 若是则直接将所述会话请求发送给被叫方进行呼叫接续。
所述呼叫接续单元 620可以包括：
检查单元 621， 用于根据所述会话请求接收单元接收的被叫方的身份标识检查所述被 叫方是否是本呼叫控制装置所属的用户；
接续单元 622， 用于在所述检査单元 621的检查结果为所述用户是本呼叫控制装置所 属的用户时， 根据所述被叫方身份标识获取所述被叫方所在的 AG， 并将所述会话邀请通 过所述 AG发送给所述被叫方。
本发明实施例提供的呼叫控制装置可以集成与现有的 AGCF上， 实现对本地用户的 呼叫控制。
本发明实施例六和实施例七提供的呼叫控制装置，可以在呼叫控制装置与 S-CSCF的 链路发生故障时， AGCF直接转发呼叫信令， 实现本地用户之间的呼叫， 在一定程度上保 持了故障发生时本地用户的通信， 提高了网络的抗故障以及应急通信的处理能力。 同时本 发明实施例中， 由呼叫控制装置直接建立会话， 可以减少路由次数， 减轻核心网网元的压 力。
实施例八、 一种呼叫控制装置， 结构示意图如图 8所示， 包括：
会话请求接收单元 710， 用于接收主叫方发送的会话请求； 所述会话请求中包含主叫 方的身份标识和被叫方的身份标识；
呼叫接续单元 720， 用于根据所述主叫方的身份标识和被叫方的身份标识检査所述主 叫方和所述被叫方是否属于集群业务的同一群组的成员， 若是， 则直接将所述会话请求发 送给被叫方进行呼叫接续。
本发明实施例八提供的呼叫控制装置可以包括： P-CSCF或 AGCF， 在主叫方用户和 被叫方用户之间签约了特殊的业务，如无需实时计费控制，那么则可以由 P-CSCF或 AGCF 接续被叫方， 简化呼叫流程， 节约控制信令， 减少核心网的负担。
以上对本发明实施例所提供的呼叫控制方法和呼叫控制装置进行了详细介绍， 其中： 当呼叫控制装置与 S-CSCF的链路发生故障时， 呼叫控制装置直接转发呼叫信令， 实 现本地用户之间的呼叫， 在一定程度上保持了故障发生时本地用户的通信， 提高了网络的 抗故障以及应急通信的处理能力， 同时本发明实施例中， 由呼叫控制装置直接建立会话， 可以减少路由次数， 减轻核心网网元的压力。
在主叫方用户和被叫方用户之间签约了特殊的业务， 如无需实时计费控制，那么则可 以由 P-CSCF或 AGCF接续被叫方， 简化呼叫流程， 节约控制信令， 减少核心网的负担。
本领域普通技术人员可以理解上述实施例的各种方法或者装置中的全部或部分步骤 是可以通过程序来指令相关的硬件来完成， 该程序可以存储于一计算机可读存储介质中， 存储介质可以包括： ROM、 RAM, 磁盘或光盘等。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只 是用于帮助理解本发明的方法及其核心思想； 同时， 对于本领域的一般技术人员， 依据本 发明的思想， 在具体实施方式及应用范围上均会有改变之处， 综上所述， 本说明书内容不 应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种呼叫控制方法， 其特征在于， 所述方法包括：
呼叫控制装置接收主叫方发送的会话请求； 所述会话请求中包含被叫方的身份标识； 若所述呼叫控制装置与服务呼叫会话控制功能实体 S-CSCF的链路发生故障， 则根据 所述被叫方的身份标识检査所述被叫方是否是所述呼叫控制装置下所属的用户， 若所述被 叫方是所述呼叫控制装置下所属的用户， 则直接将所述会话请求发送给被叫方进行呼叫接 续。
2、 如权利要求 1所述的方法， 其特征在于， 所述呼叫控制装置包括代理呼叫会话控 制功能实体 P-CSCF或者接入网关控制器 AGCF。
3、 如权利要求 1或 2所述的方法， 其特征在于， 所述呼叫控制装置根据所述被叫方 的身份标识检査所述被叫方是否是所述呼叫控制装置下所属的用户的过程包括：
呼叫控制装置检查所述被叫方身份标识是否在本地的用户列表中。
4、 如权利要求 1或 2所述的方法， 若所述被叫方不是所述呼叫控制装置下所属的用 户， 则向所述主叫方返回接续失败响应。
5、如权利要求 2所述的方法， 其特征在于， 所述呼叫控制装置是 AGCF,所述 AGCF 直接将所述会话请求发送给被叫方进行呼叫接续的过程包括：
所述 AGCF根据所述被叫方身份标识查找所述被叫方所在的接入网关 AG，将所述会 话邀请通过所述 AG发送给所述被叫方。
6、 一种呼叫控制方法， 其特征在于， 所述方法包括：
呼叫控制装置接收主叫方发送的会话请求；所述会话请求中包含主叫方的身份标识和 被叫方的身份标识；
所述呼叫控制装置根据所述主叫方的身份标识和被叫方的身份标识检查所述主叫方 和所述被叫方是否属于集群业务的同一群组的成员， 若所述主叫方和所述被叫方属于集群 业务的同一群组的成员， 则直接将所述会话请求发送给被叫方进行呼叫接续。
7、 如权利要求 6所述的呼叫控制方法， 其特征在于， 所述呼叫控制装置包括代理呼 叫会话控制功能实体 P-CSCF或者接入网关控制器 AGCF。
8、 一种呼叫控制装置， 其特征在于， 所述呼叫控制装置包括：
会话请求接收单元， 用于接收主叫方发送的会话请求； 所述会话请求中包含被叫方的 身份标识；
呼叫接续单元， 用于在所述呼叫控制装置与服务呼叫会话控制功能实体 S-CSCF的链 路发生故障时， 则根据所述被叫方的身份标识检查所述被叫方是否是所述装置下所属的用 户， 若所述被叫方是所述装置下所属的用户， 则直接将所述会话请求发送给被叫方进行呼 叫接续。
9、 如权利要求 9所述的呼叫控制装置， 其特征在于， 所述呼叫接续单元包括： 检查单元，用于根据所述会话请求接收单元接收的被叫方的身份标识检查所述被叫方 是否是本呼叫控制装置所属的用户；
接续单元，用于在所述检查单元的检査结果为所述用户是本呼叫控制装置所属的用户 时， 根据所述被叫方身份标识获取所述被叫方所在的接入网关 AG, 并将所述会话邀请通 过所述 AG发送给所述被叫方。
10、 一种呼叫控制装置， 其特征在于， 所述呼叫控制装置包括：
会话请求接收单元， 用于接收主叫方发送的会话请求； 所述会话请求中包含主叫方的 身份标识和被叫方的身份标识；
呼叫接续单元，用于根据所述主叫方的身份标识和被叫方的身份标识检査所述主叫方 和所述被叫方是否属于集群业务的同一群组的成员， 若所述主叫方和所述被叫方属于集群 业务的同一群组的成员， 则直接将所述会话请求发送给被叫方进行呼叫接续。
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