WO2009076820A1 - 一种终端服务状态改变指示的响应方法及装置 - Google Patents

一种终端服务状态改变指示的响应方法及装置 Download PDF

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Publication number
WO2009076820A1
WO2009076820A1 PCT/CN2008/073152 CN2008073152W WO2009076820A1 WO 2009076820 A1 WO2009076820 A1 WO 2009076820A1 CN 2008073152 W CN2008073152 W CN 2008073152W WO 2009076820 A1 WO2009076820 A1 WO 2009076820A1
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Prior art keywords
terminal
command message
parameter
service
service state
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PCT/CN2008/073152
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English (en)
French (fr)
Inventor
Yangbo Lin
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08862988.6A priority Critical patent/EP2214343B1/en
Publication of WO2009076820A1 publication Critical patent/WO2009076820A1/zh
Priority to US12/794,258 priority patent/US8331258B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10Architectures or entities
    • H04L65/102Gateways
    • H04L65/1043Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066Session management
    • H04L65/1073Registration or de-registration

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for responding to a terminal service status change indication based on a media gateway control protocol.
  • MGC Media Gateway Controller
  • MG Media Gateway
  • the gateway separation architecture formed by the MGC and the MG realizes the separation of the service control plane and the media bearer plane, thereby fully sharing network resources, upgrading equipment and service expansion, and reducing development and maintenance costs.
  • the MGC communicates with the MC through the media gateway control protocol.
  • the media gateway control protocols that are widely used are MGCP (Media Gateway Control Protocol) and H.248/MeGaCo (Gateway Control Protocol). Two protocols.
  • the MGCP was developed and revised by the IETF.
  • H.248/MeGaCo is based on the development of MGCP. Among them, H.248/MeGaCo version 1 was jointly developed by the ITU and IETF in November 2000 and revised in June 2003.
  • H.248 version 2 was developed by the ITU in May 2002 and revised in March 2004, H .248 Version 3 was developed by the ITU in September 2005.
  • connection model defined by the H.248/MeGaCo protocol includes a terminal (Termination) and a context (Context).
  • the terminal is a logical entity in the MG (the MG itself can also be represented by a terminal, called a root terminal), capable of transmitting and receiving one or more media.
  • the terminal is further divided into physical terminals and temporary (Ephemeral) terminals, and the physical terminals represent some semi-permanent objects.
  • the properties of the terminal are represented by a property, a signal, an event, a statistic, and the like, and a package is introduced to combine various characteristic parameters of the terminal.
  • a context (Context) is used to indicate an association between terminals.
  • a context can contain multiple terminals, and the context uses Topology to describe the interrelationship between terminals.
  • a null (Null) context For a terminal that has not been associated with another terminal, it is included by a special context called a null (Null) context.
  • the Context is created when the first terminal is added and is released when the last terminal is removed.
  • Termination and Context the interaction between the service and the bearer is actually the operation of Termination and Context. This operation is done through the command (Request) and response (Reply) of the command between the MGC and the MG.
  • commands include Add, Modify, Subtract, Move, AuditValue, AuditCapabilities, Notify, ServiceChange, and so on. among them,
  • the Add command is used to add a Termination to the Context.
  • the Add command for the first Termination in the Context is also used to create the Context.
  • the Modify command is used to change the properties of Termination, such as attributes, events, signals, and statistics.
  • the Subtract command is used to remove Termination from the Context.
  • the Subtract command for the last Termination in the Context is also used to delete the Context.
  • the Move command is used to move the Termination to another Context.
  • the AuditValue command is used to request the return of the current state of the MG's properties, events, signals, statistics, etc. about Termination.
  • the AuditCapabilities command is used to request the return of all possible states of the Termination's attributes, events, signals, statistics, etc. supported by the MG.
  • the Notify command allows the MG to notify the MGC about events that occur in the MG.
  • the ServiceChange command can be used by the MG to notify the MGC—one or a group of Terminations (or the MG itself) that will quit the service (including logout) or join the service (including registration).
  • the ServiceChange command can also be used for MGC notifications.
  • the MG adds or removes one or a group of Terminations (which can also be the MG itself).
  • the ServiceChange command can also be used for fault notification and control handover.
  • the terminal can be in one of the following three service states: InService, OutOfService, and Test.
  • InService status indicates that the terminal can be used or is being used for normal communication
  • the OutOfService status indicates that the terminal is unavailable for communication
  • the Test status indicates that the terminal is being tested.
  • the change of the terminal service status is generally performed by the ServiceChange command.
  • the ServiceChange command includes a series of parameters such as Method, Reason, and Delay.
  • the Method parameter can take values Graceful, Forced, Restart, Disconnected, Handoff, or Failover.
  • Graceful means that the entire MG or a terminal on it will quit the service after a specified delay; Forced means that the entire MG or a terminal on it suddenly quits the service; Restart refers to the entire MG or one of them The terminal will resume service after the specified delay; Disconnected means that the MG loses communication with an MGC but then resumes communication with the same MGC; Handoff means that the MGC will hand over control of one MG to another MGC; Failover means primary The MG failure will be taken over by the standby MG, or the MG finds that the primary MGC has failed and seeks control of the standby MGC.
  • the Reason parameter provides further explanation for the above method.
  • the Delay parameter provides the specified delay for the above Method. Other parameters are not described here.
  • the Restart of the ServiceChange command can be used by the MG or by the MGC.
  • the mode changes the service state of the entire MG or a certain group of terminals thereof to the InService state (for example, switching the finite state machine of the terminal state to the InService state indicated by the Restart mode parameter, or setting the flag representing the terminal service state to The InService state indicated by the Restart mode parameter may also be changed by the MG or the MGC in the Graceful or Forced mode of the ServiceChange command to change the service status of the entire MG or a group or a group of terminals to the OutOfService state (for example, the terminal status)
  • the finite state machine switches to the OutOfService state indicated by the Graceful or Forced mode parameter, or sets the flag representing the terminal service state to the OutOfService state indicated by the Graceful or Forced mode parameter.
  • the Disconnected mode in which the MG uses the ServiceChange command, and the Handoff method in which the MGC and the MG use the ServiceChange command actually change the
  • the above Delay parameter can be combined with the Restart or Graceful mode to implement the entire MG or a certain group of terminals on it to enter or exit the service after a specified delay, that is, the combination represents the entire MG or one of the above. Or a group of terminals will change to a certain service state and the time required to change to the service state.
  • a technical problem to be solved by the embodiments of the present invention is to provide a response method and apparatus for a terminal service state change indication based on a media gateway control protocol. It greatly facilitates the effective subsequent control of the terminal by the MG or MGC after the terminal service status changes.
  • an embodiment of the present invention provides a terminal service status change indication.
  • Response method the method includes:
  • a command message for indicating a change of the service state of the terminal includes at least a mode parameter and a duration parameter, where the mode parameter is used to indicate a change mode of the service state, and the duration parameter is used to indicate the changed service state. Length of time;
  • an embodiment of the present invention provides a media gateway controller, where the media gateway controller includes:
  • a determining unit configured to determine a command message for indicating a change of the service state of the terminal, where the command message includes at least a mode parameter and a duration parameter, where the mode parameter is used to indicate a change mode of the service state, and the duration parameter is used to indicate The duration of the service state changed to;
  • a sending unit configured to send the determined command message to the media gateway.
  • an embodiment of the present invention provides a media gateway, where the media gateway includes:
  • a determining unit configured to determine a command message for indicating a change of the service state of the terminal, where the command message includes at least a mode parameter and a duration parameter, where the mode parameter is used to indicate a change mode of the service state, and the duration parameter is used to indicate The duration of the service state changed to;
  • a sending unit configured to send the determined command message to the media gateway controller.
  • an embodiment of the present invention provides a media gateway controller, where the media gateway controller includes:
  • a receiving unit configured to receive a command message indicating a change of the service status of the terminal, where the command message includes at least a mode parameter and a duration parameter, where the mode parameter is used to indicate a change mode of the service state, and the time length parameter is used to indicate that the change is The duration of the service state;
  • the processing unit changes the service status of the terminal according to the mode parameter of the received command message, The changed service state is maintained according to the duration parameter of the received command message.
  • an embodiment of the present invention provides a media gateway, where the media gateway includes:
  • a receiving unit configured to receive a command message indicating a change of the service status of the terminal, where the command message includes at least a mode parameter and a duration parameter, where the mode parameter is used to indicate a change mode of the service state, and the time length parameter is used to indicate that the change is The duration of the service state;
  • the processing unit changes the service status of the terminal according to the mode parameter of the received command message, and maintains the changed service status according to the duration parameter of the received command message.
  • the embodiment of the present invention extends the parameter of the command message for indicating the change of the service status of the terminal in the media gateway control protocol, so that the MG or the MGC obtains the duration of the service state indicating the changed service status while obtaining the indication service status change indication information of the terminal.
  • the information greatly facilitates the MG or MGC to effectively control the terminal after the terminal service status changes.
  • FIG. 1 is a schematic structural diagram of an embodiment of a system for implementing a terminal service state change indication according to the present invention
  • FIG. 2 is a schematic flow chart of an embodiment of a method for transmitting a terminal service state change indication according to the present invention
  • Fig. 3 is a flow chart showing an embodiment of a response method of a terminal service state change indication of the present invention. detailed description
  • the system of this embodiment includes a media gateway 1 and a media gateway controller 2, wherein the media gateway 1 For determining a command message for indicating a change of the service status of the terminal (for example, the command message may be a service status change (ServiceChange) command message of the H.248/MeGaCo protocol, or a RestartlnProgress command message for the MGCP protocol), And sending the determined command message to the media gateway controller 2.
  • the command message may be a service status change (ServiceChange) command message of the H.248/MeGaCo protocol, or a RestartlnProgress command message for the MGCP protocol
  • the media gateway controller 2 is configured to receive a command message sent by the media gateway 1 for indicating a change of a terminal service state, and change a service state of the terminal according to the parameter content information of the received command message. , and maintain the changed service status.
  • the command message indicating that the service status of the terminal is changed includes at least a mode parameter (Method) and a duration parameter (Duration).
  • the terminal includes at least two service states, for example, a service of the terminal in the H.248/MeGaCo protocol.
  • the status includes three service states: InService (in service), OutOfService (exit service), and Test (test).
  • a uniform duration parameter is used to indicate the duration of each service state of the terminal.
  • the mode parameter (Method) is used to indicate a change mode of the service state
  • the duration parameter (Duration) is used to indicate a hold duration of the changed service state.
  • the media gateway 1 further includes a determining unit 101 and a sending unit 102, where the determining unit 101 is configured to determine a service state change (ServiceChange) command message, where the ServiceChange command message includes at least a Method parameter and a Duration parameter.
  • the mode parameter (Method) is used to indicate a change mode of the service state; the duration parameter (Duration) is used to indicate the hold duration of the changed service state.
  • the Duration parameter and the Method parameter can be used together.
  • the ServiceChange command is accompanied by the Method and Duration parameters, it means that after the Method acts on a terminal and the terminal finally changes to a certain service state, The length of time that the terminal is expected to remain in the service state.
  • the ServiceChange command message may include a series of parameters such as Method, Reason, Delay, and Duration.
  • the Method parameter can be further valued as Graceful, Forced, Restart, Disconnected, Handoff, or Failover.
  • the value of the Duration parameter may be an absolute time or a relative time. If the absolute time is taken, it is composed of a date and a time. For example, the value "20080808T080808Z" indicates that the terminal will remain in the month of August 2008. 8:8:8 on the 8th.
  • the time of the relative time is the absolute time of changing to the service state, that is, the time when the service state is officially changed, if the ServiceChange command message includes the Delay. Parameter, then the relative time should be calculated after the delay time indicated by the Delay parameter.
  • the relative time unit can be seconds. For example, when the relative time is "99999", it means that the terminal will officially change from the service state. Keep up to 99999 seconds until the service status.
  • the Duration parameter only indicates the duration of a certain service state. It does not mean that the service state will change automatically when the duration is over. Only the mode parameter in the ServiceChange command can change the service state of the terminal. Therefore, this parameter does not affect the ServiceChange command. Execution of other parameter commands.
  • the sending unit 102 is configured to send the determined service state change (ServiceChange) command message to the receiving device 20.
  • the media gateway controller 2 still further includes the receiving unit 201 and the processing list with reference to FIG. Element 202, wherein
  • the receiving unit 201 is configured to receive a service state change (ServiceChange) command message sent by the media gateway 1.
  • ServiceChange service state change
  • the MG extends the service state change (ServiceChange) command message of the duration parameter (Duration) to send the terminal service state change indication information to the MGC, and sends the service state retention duration indication information changed by the terminal to the MGC.
  • ServiceChange service state change
  • Duration duration parameter
  • the service status change (ServiceChange) command message of the extended duration parameter (Dist) of the MGC may also be used to maintain the service status changed by the sending terminal when the terminal service status change indication information is sent to the MG.
  • the duration indication information is sent to the MG, and the MG changes the service status of the terminal according to the parameter content information of the received command message, and maintains the changed service status.
  • different duration parameters may be used for different terminal service states. For example, a parameter indicating the duration of the InService service state retention time is named as Induration. This parameter can only be used in conjunction with the Restart mode to indicate how long a terminal will remain in the service state after being changed to the InService service state.
  • ExitOut Duration (OutDuration). This parameter can only be used in conjunction with the Graceful or Forced mode to indicate how long a terminal will remain in the service state after being changed to the OutOfService service state.
  • FIG. 2 is a schematic flowchart of a method for sending a terminal service state change indication according to the present invention. As shown in FIG. 2, the method in this embodiment specifically includes:
  • Step S300 The media gateway determines a service status change command message, where the message includes at least a mode parameter and a duration parameter.
  • the mode parameter (Method) is used to indicate a change mode of the service state; the duration parameter (Duration) is used to indicate the hold duration of the changed service state. Duration parameter
  • Duration can be used with the Method parameter.
  • the ServiceChange command when the ServiceChange command is accompanied by the Method and Duration parameters, it indicates the length of time that the terminal is expected to remain in the service state after the method acts on a terminal and eventually changes the terminal to a certain service state.
  • the ServiceChange command message may include a series of parameters such as Method, Reason, Delay, and Duration.
  • the Method parameter can be further valued Graceful, Forced, Restart, Disconnected, Handoff, or Failover.
  • the value of the Duration parameter may be an absolute time or a relative time. If the absolute time is taken, it is composed of a date and a time. For example, the value "20080808T080808Z" indicates that the terminal will remain in the month of August 2008. 8:8:8 on the 8th.
  • the relative time of the relative time is the absolute time to change to the service state, that is, the official change to the service. The time of the service state is started. If the ServiceChange command message includes the Delay parameter, the relative time should be calculated after the delay time indicated by the Delay parameter.
  • the relative time unit can be seconds, for example, when the relative time is used.
  • “99999” indicates that the terminal will remain 99999 seconds from the official change of the service status to the service status.
  • the Duration parameter only indicates the duration of a certain service state. It does not mean that the service state will change automatically when the duration is over. Only the mode parameter in the ServiceChange command can change the service state of the terminal. Therefore, this parameter does not affect the ServiceChange command. Execution of other parameter commands.
  • Step S301 Send the determined service status change command message to the media gateway controller.
  • 3 is a schematic flow chart of an embodiment of a method for responding to a terminal service state change indication according to the present invention. As shown in FIG. 3, the method in this embodiment specifically includes:
  • Step S401 The media gateway controller receives a service status change command message.
  • Step S402 changing the service status of the terminal according to the parameter content information in the received service status change command message, and maintaining the changed service status.
  • the media gateway controller immediately changes the terminal specified by the message to the InService service state according to the ServiceChange command message, and changes the terminal to the terminal.
  • the terminal maintains the service state for 3000 seconds after changing to the service state.
  • another embodiment of the media gateway control protocol-based terminal service state change indication method of the present invention specifically includes: The media gateway controller determines a service state change command message, where the message includes at least a mode parameter and a duration parameter. The media gateway controller sends the determined service status change command message to the media gateway.
  • Another embodiment of the receiving side corresponding to the method specifically includes: receiving, by the media gateway, a service status change command message, changing a service status of the terminal according to the parameter content information in the received service status change command message, and following The duration parameter maintains the changed service state. .
  • a service change (ServiceChange) command message of the gateway control protocol H.248/MeGaCo is used as a command message indicating a change of the terminal service state, and a restart of the media gateway control protocol may be used.
  • a command message indicating a change in the terminal service state the two command messages are the same as those required in the embodiment of the present invention.
  • the embodiment of the present invention extends the parameters of the service state change (ServiceChange) command of the gateway control protocol (H.248/MeGaCo) or the restart of the media gateway control protocol (MGCP) to the parameters of the RestartlnProgress command, and the MG serves in the sending terminal.
  • ServiceChange service state change
  • MGC gateway control protocol
  • MGCP media gateway control protocol
  • the status change indication information is sent to the MGC
  • the indication information of the retention duration of the service status changed by the transmission terminal is sent to the MGC, or the MGC sends the terminal service status change indication information to the MG, and the maintenance of the service status changed by the transmission terminal is sent.
  • the duration indication information is sent to the MG, which greatly facilitates the MG or the MGC to perform effective subsequent control on the terminal after the terminal service state is changed.

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Description

技术领域
本发明涉及通信领域, 尤其涉及一种基于媒体网关控制协议的终端服务状 态改变指示的响应方法及装置。 背景技术
MGC ( Media Gateway Controller ,媒体网关控制器)和 MG ( Media Gateway , 媒体网关)是业务与承载分离架构下的分组网络的两个关键构件。 其中, MGC 主要负责业务控制功能, MG主要负责媒体承载功能。 MGC和 MG形成的网关 分离架构, 实现了业务控制平面和媒体承载平面的分离, 从而可充分共享网络 资源, 筒化设备升级和业务扩展, 降低开发和维护成本。
MGC与 MC之间通过媒体网关控制协议进行通信, 目前应用较为广泛的媒 体网关控制协议有 MGCP ( Media Gateway Control Protocol,媒体网关控制协议 ) 和 H.248/MeGaCo ( Gateway Control Protocol, 网关控制协议 )两种协议。 MGCP 由 IETF 制订和修订。 H.248/MeGaCo 是基于 MGCP 发展而来的。 其中, H.248/MeGaCo版本 1由 ITU和 IETF于 2000年 11月共同制订并于 2003年 6 月修订, H.248版本 2由 ITU于 2002年 5月制订并于 2004年 3月修订, H.248 版本 3由 ITU于 2005年 9月制订。
目前, H.248/MeGaCo协议定义的连接模型包括终端(Termination )和上下 文( Context )。 终端是 MG ( MG本身也可以为用终端表示, 称为根(Root )终 端)中的逻辑实体, 能发送和接收一种或多种媒体。 终端又分为物理(Physical ) 终端和临时 (Ephemeral )终端, Physical 终端代表一些具有半永久存在性的物 理实体, 例如 TDM ( Time Division Multiplex, 时分复用) 时隙或模拟线等, Ephemeral终端代表一些临时申请, 用后释放的公共资源, 例如 RTP ( Real-time Transport Protocol, 实时传输协议) 流等。 用属性 ( Property ), 信号 (Signal ), 事件( Event )、 统计 (Statistic )等表示终端的特性, 并引入包(Package )将终 端的各种特性参数组合起来。 另外, 上下文(Context )用于表示终端之间的关 联。 一个上下文可以包含多个终端, 上下文以拓朴(Topology )来描述终端间的 相互关系。 对于还未与其它终端发生关联的终端, 由一个被称为空(Null )上下 文的特殊上下文来包含。 Context在添加第一个终端时被创建, 在最后一个终端 移出时被释放。
基于上述抽象连接模型, 业务与承载之间的交互实际上就是对 Termination 和 Context的操作。 这种操作通过 MGC和 MG之间的命令( Command )的请求 ( Request )和响应( Reply )来完成。这些命令类型包括增加( Add )、修改( Modify )、 删减( Subtract )、移动( Move )、审计值( AuditValue )、审计能力( AuditCapabilities )、 通报 ( Notify ), 服务改变 ( ServiceChange )等。 其中,
Add命令用于添力口 Termination到 Context中。 针对 Context 中第一个 Termination 的 Add命令也同时用于创建该 Context。
Modify命令用于更改 Termination 的属性、 事件、 信号和统计等特性。
Subtract命令用于将 Termination从 Context 中删除。 针对 Context 中最后 一个 Termination 的 Subtract命令也同时用于删除该 Context 。
Move命令用于将 Termination移动到其它 Context 。
AuditValue命令用于要求返回 MG关于 Termination 的属性、 事件、 信号 和统计等的当前状态。 AuditCapabilities命令用于要求返回 MG所支持的关于 Termination 的属 性、 事件、 信号和统计等的所有可能状态。
Notify命令允许 MG通知 MGC关于 MG中发生的事件。
ServiceChange命令可以用于 MG通告 MGC—个或一组 Termination (也 可以是 MG本身)将退出服务(包括注销)或加入服务(包括注册)。 ServiceChange 命令也可用于 MGC通知 MG将一个或一组 Termination (也可以是 MG本身) 加入或退出服务。 ServiceChange命令还可以用于故障通报和控制移交。
根据 H.248/MeGaCo对终端状态的服务状态( ServiceState )属性的定义, 终 端可以处于以下三种服务状态之一中: 在服务中 ( InService )、 退出服务 ( OutOfService )和测试(Test )。 其中, InService状态表示该终端可用于或正用 于正常通信, OutOfService状态表示该终端不可用于通信, Test状态表示该终端 正被测试中。 终端服务状态的改变一般是通过 ServiceChange命令来进行的。
ServiceChange命令包括 Method (方式)、 Reason (原因)、 Delay (延时) 等一系列参数。 Method参数可取值 Graceful (优雅)、 Forced (强制)、 Restart (重启 )、 Disconnected (中断)、 Handoff (移交)或 Failover (失效)。 其中, Graceful指整个 MG或其上的某个终端将在指定的延时之后退出服务; Forced 指整个 MG或其上的某个终端突发地退出服务; Restart指整个 MG或其上的某 个终端将在指定的延时之后恢复服务; Disconnected指 MG与某个 MGC失去通 信但随后又与同一 MGC恢复了通信; Handoff指 MGC将对某个 MG的控制移 交给另一个 MGC; Failover指主用 MG失效将由备用 MG接管, 或 MG发现主 用 MGC失效而寻求备用 MGC的控制。 Reason参数为上述 Method提供进一步 的说明, Delay参数为上述 Method提供指定的延时, 其它参数这里不做赘述。
由此可见, 可以由 MG也可以由 MGC使用 ServiceChange命令的 Restart 方式将整个 MG或其上的某个或某组终端的服务状态改变到 InService状态(例 如将终端状态的有限状态机切换到 Restart方式参数指示的 InService状态,或将 代表终端服务状态的标志设置为 Restart方式参数所指示的 InService状态 ), 也 可以由 MG或者 MGC使用 ServiceChange命令的 Graceful或 Forced方式将整个 MG或其上的某个或某组终端的服务状态改变到 OutOfService状态(例如将终端 状态的有限状态机切换到 Graceful或 Forced方式参数指示的 OutOfService状态, 或将代表终端服务状态的标志设置为 Graceful 或 Forced 方式参数所指示的 OutOfService ^犬态)。 另夕卜由 MG使用 ServiceChange命令的 Disconnected方式, 以及由 MGC和 MG配合使用 ServiceChange命令的 Handoff方式, 实际上也都 是将 MG的服务状态改变到 InService状态。
上述 Delay参数可以与 Restart或 Graceful方式配合实现整个 MG或其上的 某个或某组终端在指定延时后将进入服务或退出服务, 也即这种组合表示了整 个 MG或其上的某个或某组终端将改变到某种服务状态以及改变到该服务状态 所需要的时间。
现有技术中,通过 Delay参数仅可以将终端改变到某种服务状态所需的时间 表示出来, 而无法表示所述终端改变到所述服务状态后在所述服务状态的保持
发明内容
本发明实施例所要解决的技术问题在于, 提供一种基于媒体网关控制协议 的终端服务状态改变指示的响应方法及装置。大大方便了 MG或 MGC在终端服 务状态改变后对终端进行有效的后续控制。
为了解决上述技术问题, 本发明实施例提供了一种终端服务状态改变指示 的响应方法, 该方法包括:
接收用于指示终端服务状态改变的命令消息, 所述命令消息中至少包括方 式参数和时长参数, 所述方式参数用于指示服务状态的改变方式, 所述时长参 数用于指示改变到的服务状态的保持时长;
根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述 接收的命令消息的时长参数保持改变后的服务状态。
相应的, 本发明实施例提供了一种媒体网关控制器, 该媒体网关控制器包 括:
确定单元, 用于确定用于指示终端服务状态改变的命令消息, 所述命令消 息中至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方 式, 所述时长参数用于指示改变到的服务状态的保持时长;
发送单元, 用于将所述确定的命令消息发送给媒体网关。
相应的, 本发明实施例提供了一种媒体网关, 该媒体网关包括:
确定单元, 用于确定用于指示终端服务状态改变的命令消息, 所述命令消 息中至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方 式, 所述时长参数用于指示改变到的服务状态的保持时长;
发送单元, 用于将所述确定的命令消息发送给媒体网关控制器。
相应的, 本发明实施例提供了一种媒体网关控制器, 该媒体网关控制器包 括:
接收单元, 用于接收指示终端服务状态改变的命令消息, 所述命令消息中 至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方式, 所述时长参数用于指示改变到的服务状态的保持时长;
处理单元, 根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述接收的命令消息的时长参数保持改变后的服务状态。
相应的, 本发明实施例提供了一种媒体网关, 该媒体网关包括:
接收单元, 用于接收指示终端服务状态改变的命令消息, 所述命令消息中 至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方式, 所述时长参数用于指示改变到的服务状态的保持时长;
处理单元, 根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述接收的命令消息的时长参数保持改变后的服务状态。
本发明实施例通过扩展媒体网关控制协议中用于指示终端服务状态改变的 命令消息的参数,使 MG或 MGC在获取指示终端服务状态改变指示信息的同时, 获取指示改变到的服务状态的保持时长的信息,大大方便了 MG或 MGC在终端 服务状态改变后对终端进行有效的后续控制。 附图说明
图 1是本发明实现终端服务状态改变指示的系统的一个实施例结构示意图; 图 2是本发明的终端服务状态改变指示的发送方法的一个实施例流程示意 图;
图 3是本发明的终端服务状态改变指示的响应方法的一个实施例流程示意 图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本发明 实施例作进一步地详细描述。
图 1是本发明实现终端 (终端是 MG中的逻辑实体, MG本身也可以用终 端表示, 称为根终端)服务状态改变的指示的系统的一个实施例结构示意图; 如图 1所示, 本实施例的系统包括媒体网关 1和媒体网关控制器 2, 其中所述媒 体网关 1 用于确定用于指示终端服务状态改变的命令消息 (比如该命令消息可 以为 H.248/MeGaCo协议的服务状态改变 ( ServiceChange )命令消息, 或者为 MGCP协议的重启进行( RestartlnProgress )命令消息), 并将所述确定后的命令 消息发送给所述媒体网关控制器 2。相应的, 所述媒体网关控制器 2用于接收所 述媒体网关 1 发送的用于指示终端服务状态改变的命令消息, 并根据所述接收 的命令消息的参数内容信息改变所述终端的服务状态, 以及保持改变后的服务 状态。其中,所述指示终端服务状态改变的命令消息至少包括方式参数(Method ) 和时长参数(Duration ), 具体实现中, 终端包括至少两种服务状态, 比如, H.248/MeGaCo协议中终端的服务状态包括 InService (在服务中)、 OutOfService (退出服务)和 Test (测试)三种服务状态, 本实施例中, 采用统一的时长参数 来指示所述终端的各服务状态的保持时长。 具体的, 所述方式参数(Method ) 用于指示服务状态的改变方式; 所述时长参数(Duration )用于指示改变到的服 务状态的保持时长。
以下以命令消息为 ServiceChange命令消息为例进行说明。
仍参考图 1 , 媒体网关 1进一步包括确定单元 101和发送单元 102, 其中, 所述确定单元 101 用于确定服务状态改变(ServiceChange )命令消息, 所 述 ServiceChange命令消息至少包括 Method参数和 Duration参数。 所述方式参 数(Method )用于指示服务状态的改变方式; 所述时长参数(Duration )用于指 示改变到的服务状态的保持时长。 时长参数 ( Duration )与方式参数(Method ) 参数可配合使用。 比如, 当 ServiceChange命令同时附带 Method和 Duration参 数时,表示在该 Method作用于某个终端而将该终端最终改变到某种服务状态后, 该终端预期将保持在该服务状态的时长。 具体实现中, ServiceChange命令消息 可包括 Method, Reason (原因)、 Delay (延时 ) 以及 Duration等一系列参数。 Method参数可进一步取值为 Graceful (优雅)、 Forced (强制)、 Restart (重启)、 Disconnected (中断)、 Handoff (移交)或 Failover (失效 )等。
进一步, Duration参数取值可以是绝对时间或相对时间, 若取值绝对时间, 则其由日期和时间组成, 例如取值 "20080808T080808Z" 表示该终端在该月良务 状态将保持到 2008年 8月 8日 8时 8分 8秒。 若取值相对时间, 则该相对时间 的时间起算点为改变到所述服务状态的绝对时间, 也即是以正式改变到该服务 状态的时间为起始, 如果 ServiceChange命令消息中同时包括有 Delay参数, 那 么该相对时间应该在 Delay参数表示的延迟时间过后才起始计算,相对时间的单 位可为秒, 例如当相对时间取值 "99999" , 表示该终端在该服务状态将从其正 式改变到该服务状态起保持 99999秒。 例如: ServiceChange { Method=Restart, Durational 000 }表示该终端将立即改变到 InService服务状态, 并将在改变到该 服务状态后保持该服务状态 1000 秒; 以及 ServiceChange { Method=Graceful, Delay=30, Duration=3000 }表示该终端将在 30秒后改变到 OutOf Service服务状 态, 并将在改变到该服务状态后保持该服务状态 3000秒。
另外 Duration参数只是指示某种服务状态的保持时长, 并不代表当该时长 结束时服务状态将自动改变, 只有 ServiceChange命令中的方式参数才能改变终 端的服务状态, 因此, 该参数并不影响 ServiceChange命令中其他参数命令的执 行。
所述发送单元 102用于将所述确定好的服务状态改变 (ServiceChange )命 令消息发送给所述接收装置 20。
相应的, 仍参考图 1媒体网关控制器 2进一步包括接收单元 201和处理单 元 202, 其中,
所述接收单元 201 用于接收所述媒体网关 1 发送的服务状态改变 ( ServiceChange )命令消息。
所述处理单元 202用于根据所述接收到的服务状态改变(ServiceChange ) 命令消息中的参数内容信息改变所述终端的服务状态, 以及保持改变后的服务 态。比: ¾口,当媒体网关 1发送 ServiceChange { Method=Restart, Durational 000 } 的命令消息时, 处理单元 202根据该 ServiceChange命令消息将该消息指定的终 端立即改变到 InService服务状态, 并将该终端在改变到该服务状态后保持该服 务状态 1000秒;而当媒体网关 1发送 ServiceChange { Method=Graceful, Delay=30: Duration=3000 }的命令消息时, 处理单元 202将根据该 ServiceChange命令消息 将该消息指定的终端在 30秒后改变到 OutOfService服务状态, 并将该终端在改 变到该服务状态后保持该服务状态 3000秒。
本实施例中 MG 通过扩展了时长参数 (Duration ) 的服务状态改变 ( ServiceChange )命令消息,在发送终端服务状态改变指示信息给 MGC的同时, 发送终端改变到的服务状态的保持时长指示信息给 MGC, 大大方便了 MG或 MGC在终端服务状态改变后对终端进行有效的后续控制。 比如, 当 MG遭遇过 载或计划维护时,将告知 MGC其已经或很快将退出服务, 若同时附带上其何时 将恢复服务的信息, 则将有助于 MGC的后续控制, 包括呼叫的抑制或改向, 以 及通知用户等待一定时间后再尝试呼叫等等。当然,在具体实施时,也可由 MGC 通过扩展的时长参数 ( Duration ) 的服务状态改变 (ServiceChange )命令消息, 在发送终端服务状态改变指示信息给 MG的同时, 发送终端改变到的服务状态 的保持时长指示信息给 MG, MG通过根据所述接收的命令消息的参数内容信息 改变所述终端的服务状态, 并保持改变后的服务状态。 另外, 在具体实施时, 可为不同的终端服务状态采用不同的时长参数, 比 如,将指示 InService服务状态保持时长的参数命名为在服务中时长( InDuration )。 该参数仅可与 Restart方式配合使用,表示某个终端在被改变到 InService服务状态 后将保持在该服务状态的时长。 而将指示 OutOfService服务状态保持时间的参数 命名为退出服务时长( OutDuration )。该参数仅可与 Graceful或 Forced方式配合使 用, 表示某个终端在被改变到 OutOfService服务状态后将保持在该服务状态的时 长。
相应的, 图 2是本发明的终端服务状态改变指示的发送方法的一个实施例 流程示意图; 如图 2所示, 本实施例的方法具体包括:
步骤 S300, 媒体网关确定服务状态改变命令消息, 所述消息至少包括方式 参数和时长参数。 所述方式参数(Method )用于指示服务状态的改变方式; 所 述时长参数 (Duration ) 用于指示改变到的服务状态的保持时长。 时长参数
( Duration ) 与方式参数 ( Method )参数可配合使用。 比如, 当 ServiceChange 命令同时附带 Method和 Duration参数时, 表示在该 Method作用于某个终端而 将该终端最终改变到某种服务状态后, 该终端预期将保持在该服务状态的时长。 具体实现中, ServiceChange命令消息可包括 Method, Reason (原因)、 Delay (延 时)以及 Duration等一系列参数。 Method参数可进一步取值为 Graceful (优雅)、 Forced (强制)、 Restart (重启)、 Disconnected (中断)、 Handoff (移交)或 Failover
(失效)等。
进一步, Duration参数取值可以是绝对时间或相对时间, 若取值绝对时间, 则其由日期和时间组成, 例如取值 "20080808T080808Z" 表示该终端在该月良务 状态将保持到 2008年 8月 8日 8时 8分 8秒。 若取值相对时间时, 则该相对时 间的时间起算点为改变到所述服务状态的绝对时间, 也即是以正式改变到该服 务状态的时间为起始, 如果 ServiceChange命令消息中同时包括有 Delay参数那 么该相对时间应该在 Delay参数表示的延迟时间过后才起始计算,相对时间的单 位可为秒, 例如当相对时间取值 "99999" , 表示该终端在该服务状态将从其正 式改变到该服务状态起保持 99999秒。 例如: ServiceChange { Method=Restart, Durational 000 }表示该终端将立即改变到 InService服务状态, 并将在改变到该 服务状态后保持该服务状态 1000 秒; 以及 ServiceChange { Method=Graceful, Delay=30, Duration=3000 }表示该终端将在 30秒后改变到 OutOf Service服务状 态, 并将在改变到该服务状态后保持该服务状态 3000秒。
另外 Duration参数只是指示某种服务状态的保持时长, 并不代表当该时长 结束时服务状态将自动改变, 只有 ServiceChange命令中的方式参数才能改变终 端的服务状态, 因此, 该参数并不影响 ServiceChange命令中其他参数命令的执 行。
步骤 S301 ,将所述确定好的服务状态改变命令消息发送给媒体网关控制器。 图 3是本发明的终端服务状态改变指示的响应方法的一个实施例流程示意 图; 如图 3所示, 本实施例的方法具体包括:
步骤 S401 , 媒体网关控制器接收服务状态改变命令消息;
步骤 S402, 根据所述接收到的服务状态改变命令消息中的参数内容信息改 变所述终端的服务状态, 并保持改变后的服务状态。。 比如, 当媒体网关发送 ServiceChange { Method=Restart, Durational 000 }的命令消息时,媒体网关控制器 根据该 ServiceChange命令消息将该消息指定的终端立即改变到 InService服务状 态, 并将该终端在改变到该服务状态后保持该服务状态 1000秒; 而当媒体网关 发送 ServiceChange { Method=Graceful, Delay=30, Duration=3000 }的命令消息 时,媒体网关控制器将根据该 ServiceChange命令消息将该消息指定的终端在 30 秒后改变到 OutOfService服务状态, 并将该终端在改变到该服务状态后保持该 服务状态 3000秒。
相应的, 本发明的基于媒体网关控制协议的终端服务状态改变指示方法发 送侧的另一个实施例具体包括: 媒体网关控制器确定服务状态改变命令消息, 所述消息至少包括方式参数和时长参数。 媒体网关控制器将所述确定好的服务 状态改变命令消息发送给媒体网关。 与该方法对应的接收侧的另一个实施例具 体包括: 媒体网关接收服务状态改变命令消息, 根据所述接收到的服务状态改 变命令消息中的参数内容信息改变所述终端的服务状态, 并按照时长参数保持 改变后的服务状态。。 本发明的上述实施例中使用了网关控制协议 H.248/MeGaCo 的服务改变 ( ServiceChange )命令消息作为指示终端服务状态改变的命令消息, 也可以使 用媒体网关控制协议的重启进行( RestartlnProgress )命令消息作为指示终端服 务状态改变的命令消息, 这两种命令消息在本发明实施例中使用所需的参数相 同。
本发明实施例通过扩展网关控制协议 ( H.248/MeGaCo ) 的服务状态改变 ( ServiceChange ) 命令的参数或媒体网关控制协议 (MGCP ) 的重启进行 ( RestartlnProgress )命令的参数, 由 MG在发送终端服务状态改变指示信息给 MGC的同时, 发送终端改变到的服务状态的保持时长的指示信息给 MGC, 或 者由 MGC在发送终端服务状态改变指示信息给 MG的同时,发送终端改变到的 服务状态的保持时长指示信息给 MG,大大方便了 MG或 MGC在终端服务状态 改变后对终端进行有效的后续控制。
以上所列举的仅为本发明较佳实施例而已, 当然不能以此来限定本发明之 权利范围, 因此依本发明权利要求所作的等同变化, 仍属本发明所涵盖的范围。

Claims

权 利 要 求
1、 一种终端服务状态改变指示的响应方法, 其特征在于, 包括: 接收用于指示终端服务状态改变的命令消息, 所述命令消息中至少包括方 式参数和时长参数, 所述方式参数用于指示服务状态的改变方式, 所述时长参 数用于指示改变到的服务状态的保持时长;
根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述 接收的命令消息的时长参数保持所述终端改变后的服务状态。
2、 如权利要求 1所述的终端服务状态改变指示的响应方法, 其特征在于, 接收所述命令消息的实体为媒体网关, 且所述命令消息来自媒体网关控制器, 所述根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述 接收的命令消息的时长参数保持所述终端改变后的服务状态具体包括:
根据所述接收的命令消息的方式参数改变所述媒体网关中所述终端的服务 状态, 根据所述接收的命令消息的时长参数保持所述媒体网关中所述终端改变 后的服务状态。
3、 如权利要求 1所述的终端服务状态改变指示的响应方法, 其特征在于, 接收所述命令消息的实体为媒体网关控制器, 且所述命令消息来自媒体网关, 所述的根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所 述接收的命令消息的时长参数保持所述终端改变后的服务状态具体包括:
根据所述接收的命令消息的方式参数改变所述媒体网关控制器中所述终端 的服务状态, 根据所述接收的命令消息的时长参数保持所述媒体网关控制器中 所述终端改变后的服务状态。
4、 如权利要求 1-3中任一项所述的终端服务状态改变指示的响应方法, 其 特征在于, 采用同一时长参数或者不同的时长参数来指示所述终端的各服务状 态的保持时长。
5、 如权利要求 4所述的终端服务状态改变指示的响应方法, 其特征在于, 当要改变到的服务状态为 "在服务中" 时, 所述方式参数取值为 "重启", 所 述时长参数为与 "在服务中" 的服务状态唯一对应的时长参数。
6、 如权利要求 4所述的终端服务状态改变指示的响应方法, 其特征在于, 当要改变到的服务状态为 "退出服务" 时, 所述方式参数取值为 "优雅"或 "强 制", 所述时长参数为与 "退出服务" 的服务状态唯一对应的时长参数。
7、 如权利要求 1-3中任一项所述的终端服务状态改变指示的响应方法, 其 特征在于, 所述的时长参数的取值为绝对时间或者相对时间。
8、 如权利要求 7所述的终端服务状态改变指示的响应方法, 其特征在于, 所述相对时间的时间起算点为改变到所述 务状态时的绝对时间。
9、 一种媒体网关控制器, 其特征在于, 包括:
确定单元, 用于确定用于指示终端服务状态改变的命令消息, 所述命令消 息中至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方 式, 所述时长参数用于指示改变到的服务状态的保持时长;
发送单元, 用于将所述确定的命令消息发送给媒体网关。
10、 一种媒体网关, 其特征在于, 包括:
确定单元, 用于确定用于指示终端服务状态改变的命令消息, 所述命令消 息中至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方 式, 所述时长参数用于指示改变到的服务状态的保持时长;
发送单元, 用于将所述确定的命令消息发送给媒体网关控制器。
11、 一种媒体网关控制器, 其特征在于, 包括:
接收单元, 用于接收用于指示终端服务状态改变的命令消息, 所述命令消 息中至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方 式, 所述时长参数用于指示改变到的服务状态的保持时长;
处理单元, 根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述接收的命令消息的时长参数保持所述终端改变后的服务状态。
12、 一种媒体网关, 其特征在于, 包括:
接收单元, 用于接收指示终端服务状态改变的命令消息, 所述命令消息中 至少包括方式参数和时长参数, 所述方式参数用于指示服务状态的改变方式, 所述时长参数用于指示改变到的服务状态的保持时长;
处理单元, 根据所述接收的命令消息的方式参数改变所述终端的服务状态, 根据所述接收的命令消息的时长参数内容信息保持所述终端改变后的服务状 态。
PCT/CN2008/073152 2007-12-05 2008-11-21 一种终端服务状态改变指示的响应方法及装置 WO2009076820A1 (zh)

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