WO2009092251A1 - 标识媒体资源的方法、媒体网关及媒体网关控制器 - Google Patents

标识媒体资源的方法、媒体网关及媒体网关控制器 Download PDF

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Publication number
WO2009092251A1
WO2009092251A1 PCT/CN2008/073634 CN2008073634W WO2009092251A1 WO 2009092251 A1 WO2009092251 A1 WO 2009092251A1 CN 2008073634 W CN2008073634 W CN 2008073634W WO 2009092251 A1 WO2009092251 A1 WO 2009092251A1
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WIPO (PCT)
Prior art keywords
media
media resource
identifier
resource
media gateway
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PCT/CN2008/073634
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English (en)
French (fr)
Inventor
Yangbo Lin
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to JP2010540005A priority Critical patent/JP2011508545A/ja
Priority to EP08871543A priority patent/EP2222047A4/en
Publication of WO2009092251A1 publication Critical patent/WO2009092251A1/zh
Priority to US12/826,341 priority patent/US20100265960A1/en

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Classifications

    • 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
    • H04L65/10Architectures or entities
    • H04L65/102Gateways
    • H04L65/1023Media gateways

Definitions

  • the Media Gateway Controller (MGC) and the Media Gateway (MG) are two key components of the packet network under the service and bearer separation architecture.
  • the MGC is responsible for the service control function, and the MG is responsible for the media bearer function, thereby separating 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 networking diagram of the media gateway and the media gateway controller is shown in Figure 1.
  • the protocols for communication between the MG and the MGC are mainly the Gateway Control Protocol (H.248/MeGaCo, Media Gateway Control Protocol) and the Media Gateway Control Protocol (MGCP), and H.248/MeGaCo. It is based on the development of MGCP. Taking H.248 as an example, various resources on the MG are abstractly represented as Terminations. The terminal is further divided into physical (Phy) terminals and temporary (Ephemeral) terminals. The former represents some semi-permanent physical entities, such as time division multiplexing (TDM) time slots, etc., the latter represents some temporary applications. Released public resources, such as Real Time Transport Protocol (RTP) flows.
  • the MG as a whole is represented by a special terminal called a root terminal.
  • Context The association between terminals is abstracted as a context (Context).
  • Context can contain multiple terminals, so the relationship between the terminals is described in terms of Topology.
  • null null
  • the MGC When a user requests a certain media service from the MGC, for example, playing a certain media, the MGC needs to instruct the MG to allocate the corresponding media resource, which is an initialization process for providing the media service to the MGC and the MG. At the same time, users may also need to know the relevant information of these media resources in order to properly use and control the media services provided. This requires uniquely identifying the media resources allocated for the media service during the relevant interaction between the MGC and the MG.
  • the current (media) gateway control protocol lacks such a support mechanism. Summary of the invention
  • the embodiment of the invention provides a method for identifying a media resource, so that the media gateway controller and the media gateway can identify the media resource allocated for the media service to manage and control the media resource allocated for the media service.
  • the media gateway requests to operate the media resource according to the command sent by the media gateway controller, and associates the media resource of the operation with the media resource identifier;
  • the media gateway sends back information of the media resource identified by the associated media resource to the media gateway controller by using a corresponding command response.
  • the embodiment of the invention further provides a media gateway controller, including:
  • An identifier setting module configured to set a media resource identifier in a command request sent by the request sending module
  • a request sending module configured to send a command request for operating a media resource to the media gateway
  • the response receiving module is configured to receive a command response from the media gateway corresponding to the command request of the operating media resource sent by the request sending module;
  • an information acquiring module configured to obtain information about the media resource of the associated media resource identifier from the command response received by the response receiving module.
  • an embodiment of the present invention further provides a media gateway, including:
  • a request receiving module configured to receive a command request for an operating media resource from the media gateway controller, and an identifier association module, configured to request to operate the media resource according to a command sent by the media gateway controller, and operate the media resource and the media resource Identification associated;
  • the response sending module is configured to feed back information of the media resource identified by the associated media resource to the media gateway controller by using a corresponding command response.
  • the method for identifying a media resource provided by the embodiment of the present invention, the media gateway controller and the media gateway, the media gateway associates the media resource identifier with the media resource, so that the media gateway controller and the media gateway can adopt a unique media resource identifier.
  • Manage and control media resources provide media services to users, and enable users to properly use and control the media services provided.
  • 1 is a schematic diagram of networking of an existing media gateway and a media gateway controller
  • FIG. 2 is a schematic structural diagram of a media gateway controller according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a media gateway according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a first embodiment of a method for identifying a media resource according to an embodiment of the present invention
  • FIG. 5 is a schematic flow chart of a second embodiment of a method for identifying a media resource according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a method for identifying media resources.
  • the media gateway controller and the media gateway, the media gateway controller and the media gateway can use a unique media resource identifier to manage and control the media resources allocated for the media service.
  • the media resource identifier, corresponding to the media resource, is used to distinguish each media resource.
  • FIG. 2 is a schematic structural diagram of a media gateway controller according to an embodiment of the present invention.
  • the identifier setting module 10 is configured to set a media resource identifier in the command request sent by the request sending module 11, and if the media resource identifier takes a specific value, the media gateway controller instructs the media gateway to operate the media resource and the media.
  • the resource identifier is associated with, or operates on, the associated media resource for the media resource identifier; if the media resource identifier is set to "select or" the wildcard "$", it indicates that the media gateway controller wants the media gateway to determine the media resource for which the media gateway operates And identifying, by the media resource identifier, the determined media resource identifier and the media resource identifier of the associated media resource identifier to the media gateway controller;
  • the request sending module 11 is configured to send a command request for operating the media resource to the media gateway.
  • the types of commands exchanged between the media gateway controller and the media gateway include, but are not limited to, adding, modifying, deleting, and moving.
  • Audit value, audit capability, notification, service change, etc., the command parameters are classified into attributes, signals, events, statistics, etc., when the media resource needs to be identified, the requesting transmission module 11 sends the operation media resource to the media gateway.
  • the command request is specifically a command type for allocating or adjusting the media resource, including adding, modifying, moving, and the like; once the media resource and the media resource identifier are associated, the media resource identifier is used to uniquely identify the media resource, and then the subsequent media
  • the media resource identifier may be referenced to indicate the operated media resource by a command exchanged between the gateway controller and the media gateway, such as adding, modifying, deleting, moving, auditing value, auditing capability, notification, service change, and the like.
  • the response receiving module 12 is configured to receive a command response corresponding to a command request of the media resource from the operation media resource sent by the request sending module 10.
  • the information obtaining module 13 is configured to obtain the information of the media resource identifier and/or the media resource from the command response received by the response receiving module 12, and when the value of the media resource identifier set by the identifier setting module 10 is a specific value, Then, the information obtained from the response received by the response receiving module 12 includes the information about the media resource associated with the media resource identifier, and the value of the media resource identifier attribute set by the identifier setting module 10 is selected. When the "wildcard" is "", the information obtained from the response received by the response receiving module 12 includes the media resource identifier determined by the media gateway for the media resource it operates, and the media resource associated with the media resource identifier. Related information.
  • the media resource identifier can be represented by an attribute, which can be defined in an existing package or a new package.
  • the attribute type is a string (String), which can be a Uniform Resource Identifier (URI) or an Internationalized Resource Identifier (IRI).
  • the URI can be a single name or a Universal Resource Locator (URL).
  • the schemes that URLs can use include file, ftp, http, rtsp, rtsps, and rtspu.
  • the file scheme is used for media resources local to the MG.
  • the ftp scheme is used for media resources on other devices other than the MG.
  • the http scheme can be used for both local and remote media resources.
  • the rtsp, rtsps, and rtspu schemes are used.
  • the media resources transmitted in the form of a stream the transmission of the rtsp scheme uses Transmission Control Protocol (TCP), the transmission of the rtsps scheme uses Transport Layer Security (TLS), and the transmission of the rtspu scheme uses the User Datagram Protocol ( UDP, User Datagram Protocol).
  • TCP Transmission Control Protocol
  • TLS Transport Layer Security
  • UDP User Datagram Protocol
  • the attribute type can also be an integer (Integer), which is equivalent to the number of the media resource, and its numbering scheme can be designed as needed.
  • This integer identifier is similar to the bucket name in the string identifier above.
  • This attribute can be applied to the terminal (Termination) or the stream (Stream) on the terminal.
  • FIG. 3 is a schematic structural diagram of a media gateway according to an embodiment of the present invention.
  • the media gateway in this implementation includes:
  • the request receiving module 20 is configured to receive a command request for the operating media resource from the media gateway controller.
  • the types of commands exchanged between the media gateway controller and the media gateway include, but are not limited to, adding, modifying, and deleting. , mobile, audit value, audit capability, notification, service change, etc., whose command parameters are classified into attributes, signals, events, statistics, etc., when the media resource needs to be identified, the request receiving module 20 receives control from the media gateway.
  • the command request for the operation of the media resource is specifically a command type for allocating or adjusting the media resource, including adding, modifying, moving, etc.; once the media resource and the media resource identifier are associated, the media resource identifier is used to uniquely identify the media resource.
  • the media resource identifier may be referenced to indicate The media resource being operated.
  • the identifier obtaining module 21 is configured to obtain the media resource identifier from the command request received by the request receiving module 20, and if the value is a specific value, the media gateway associates the media resource identifier with the media resource it operates, or passes the media resource.
  • the identifier is operated after learning the associated media resource; if the value is "select" or the wildcard "$", the media gateway determines the media resource identifier for the media resource it operates and associates with the media resource.
  • the identifier association module 22 is configured to associate the media resource operated by the media gateway with the media resource identifier, and save the association information.
  • the response sending module 23 is configured to send a command response corresponding to the command request of the operating media resource received by the request receiving module 20 to the media gateway controller.
  • the media resource identifier may be represented by an attribute, which may be defined in an existing package or a new package.
  • the attribute type is a string (String), which can be a Uniform Resource Identifier (URI) or an Internationalized Resource Identifier (IRI).
  • the URI can be a single name or a Universal Resource Locator (URL).
  • the schemes that URLs can use include file, ftp, http, rtsp, rtsps, and rtspu.
  • the file scheme is used for media resources local to the MG.
  • the ftp scheme is used for media resources on other devices other than the MG.
  • the http scheme can be used for both local and remote media resources.
  • the rtsp, rtsps, and rtspu schemes are used.
  • the media resources transmitted in the form of a stream uses TCP (Transmission Control Protocol), the transmission of the rtsps scheme uses TLS (Transport Layer Security), and the transmission of the rtspu scheme uses UDP (User Data Protocol).
  • TCP Transmission Control Protocol
  • TLS Transmission Layer Security
  • UDP User Data Protocol
  • the attribute type can also be an integer (Integer), which is equivalent to the number of the media resource, and its numbering scheme can be designed as needed.
  • This integer identifier is similar to the bucket name in the string identifier above.
  • This attribute can be applied to the terminal (Termination) or the stream (Stream) on the terminal.
  • FIG. 4 is a schematic flowchart diagram of a first embodiment of a method for identifying a media resource according to an embodiment of the present invention.
  • the property identifier is represented by a property (Property), which can be defined in an existing package or a new package.
  • the new package is named "Media Resource Identification (abbreviated as mri) package," and the attribute is named “Specification (abbreviated as spec)” and is used in the format of "mri/spec”.
  • the attribute type is a string (String), which can be a Uniform Resource Identifier (URI) or an Internationalized Resource Identifier (IRI).
  • the URI can be a single name or a Universal Resource Locator (URL).
  • the schemes that URLs can use include file, ftp, http, rtsp, rtsps, and rtspu.
  • the file scheme is used for media resources local to the MG.
  • the ftp scheme is used for media resources on other devices other than the MG.
  • the http scheme can be used for both local and remote media resources, rtsp, rtsps, and rtspu.
  • the scheme is used for streaming media resources.
  • the transmission of the rtsp scheme uses TCP (Transmission Control Protocol), the transmission of the rtsps scheme uses TLS (Transport Layer Security), and the transmission of the rtspu scheme uses UDP (User Data Protocol).
  • TCP Transmission Control Protocol
  • TLS Transmission Layer Security
  • UDP User Data Protocol
  • the attribute type can also be an integer (Integer), which is equivalent to the number of the media resource, and its numbering scheme can be designed as needed.
  • This integer identifier is similar to the bucket name in the string identifier above.
  • Termination the terminal
  • Stream the stream on the terminal. If applied to a terminal, it is defined in the Termination State descriptor. If applied to a stream, it is defined in the Local Control descriptor.
  • the attribute is readable and writable, that is, the MGC can set the attribute to the MG to identify the specified media resource, and the MGC can also read the attribute from the MG to obtain the identity of the specified media resource.
  • the media gateway (MG) receives a command request for the operation media resource from the media gateway controller (MGC), and carries an attribute indicating the media resource identifier in the command request, where the value of the attribute is a specific value;
  • the value of the attribute attached to the MGC is the set media resource identifier, and the media resource indicating that the MGC requests the MG to operate should be associated with the media resource identifier;
  • step S101 the MG requests to operate the media resource according to the command
  • step S102 the MG associates the media resource it operates with the media resource identifier
  • step S103 the MG returns the information of the information media resource of the media resource identified by the associated media resource to the MGC through a corresponding command response;
  • step S104 the subsequent interaction command between the MGC and the MG only needs to include the attribute and the value is a specific value, and the MGC and the MG operate the media resource represented by the specific value;
  • the subsequent MGC may also read (e.g., by audit value command) the attribute from the MG to obtain the media resource identification.
  • FIG. 5 is a schematic flowchart diagram of a second embodiment of a method for identifying a media resource according to an embodiment of the present invention.
  • step S200 the media gateway (MG) receives a command request for the operating media resource from the media gateway controller (MGC), and carries an attribute indicating the media resource identifier in the command request;
  • the MGC is accompanied by the attribute and takes the value of the "select" wildcard "$", indicating that the MGC wishes to determine the media resource identifier by the MG, and the MG will determine in the corresponding command response.
  • the information of the media resource identifier and the media resource of the associated media resource identifier is fed back to the MGC.
  • step S201 the MG requests to operate the media resource according to the command
  • step S202 the MG determines a media resource identifier for the media resource it operates, and associates the media resource it operates with the media resource identifier;
  • step S203 the MG feeds back the information of the media resource identifier and the media resource identified by the associated media resource to the MGC through a corresponding command response.
  • step S204 the subsequent interaction command between the MGC and the MG only needs to include the attribute and the value is a specific value, and the MGC and the MG operate the media resource represented by the specific value;
  • the subsequent MGC may also read (e.g., by an audit value command) the attribute from the MG to obtain the identity of the media resource.
  • the media resource identification attribute may be applied to the stream on the terminal or the terminal, and the terminal may be a ⁇ (root) terminal representing the entire MG or an individual terminal on the MG, so different levels of application of the attribute
  • the media resource that determines its identity may be an individual terminal on the entire MG, MG, or a certain stream on the terminal. If the media resource identifier is set at a higher level, such as the entire MG, but is subsequently used at a lower level, such as an individual terminal, then it is considered to be the media resource associated with the media resource identity on the individual terminal.
  • the method for identifying a media resource mentioned in the embodiment of the present invention may be applied to real-time media control under the service and bearer separation architecture represented by the media gateway controller and the media gateway.
  • the method for identifying a media resource provided by the present invention is implemented by extending an existing (media) gateway control protocol (including but not limited to a gateway control protocol (H.248/MeGaCo, Media Gateway Control Protocol) and a media gateway control protocol (MGCP,
  • MGCP media gateway control protocol
  • the Media Gateway Control Protocol (2) protocol can uniquely identify the media resource, so that the media gateway controller and the media gateway can use a unique media resource identifier to manage and control the media resource for the media service.
  • the embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product.
  • the computer software product is stored in a storage medium and includes a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform the methods described in various embodiments of the present invention.
  • the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and equivalent changes made in the claims of the present invention are still within the scope of the present invention.

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  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)

Description

标识媒体资源的方法, 媒体网关及媒体网关控制器
本申请要求于 2007 年 12 月 29 日提交中国专利局、 申请号为 200710033046.3、 发明名称为 "标识媒体资源的方法, 媒体网关及媒体网关控制 器" 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 本发明涉及分组网络技术, 尤其涉及一种标识媒体资源的方法, 媒体网关 及媒体网关控制器。 背景技术
媒体网关控制器 (MGC, Media Gateway Controller )和媒体网关 ( MG, Media Gateway )是业务与承载分离架构下的分组网络的两个关键构件。 MGC 负责业务控制功能, MG负责媒体承载功能,藉此实现业务控制平面和媒体承载 平面的分离, 从而充分共享网络资源, 筒化设备升级和业务扩展, 降低开发和 维护成本。 媒体网关和媒体网关控制器的组网示意图如图 1所示。
MG和 MGC之间通信的协议主要有网关控制协议( H.248/MeGaCo , Media Gateway Control Protocol )和媒体网关控制十办议 ( MGCP, Media Gateway Control Protocol ) 两种协议, 并且 H.248/MeGaCo是基于 MGCP发展而来的。 以 H.248 为例, MG 上的各种资源被抽象表示为终端 ( Termination )。 终端又分为物理 ( Physical )终端和临时(Ephemeral )终端, 前者代表一些具有半永久存在性的 物理实体, 例如时分复用 (TDM, Time Division Multiplex ) 时隙等, 后者代表 一些临时申请用后释放的公共资源,例如实时传输协议( RTP, Real-time Transport Protocol ) 流等。 另以被称为根(Root )终端的特殊终端来代表 MG整体。 终端 之间的关联被抽象表示为上下文(Context )。 上下文可以包含多个终端, 因而以 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。
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。命令类型包括增加( Add )、修改( Modify )、 删减 (Subtract ) , 移动 (Move )、 审计值 (Audit Value )、 审计能力 (Audit Capabilities ), 通报(Notify ), 服务改变 (Service Change )。 命令参数, 也称为 描述符 ( Descriptor ), 被分类为属性(Property ), 信号(Signal ), 事件( Event )、 统计 (Statistic ) 等。 为了方便将具有业务相关性的参数从逻辑上聚合为包
( Package )。
当用户向 MGC请求某种媒体服务, 例如播放某个媒体时, MGC需要指示 MG分配相应的媒体资源,这对 MGC和 MG而言是提供媒体服务的初始化过程。 同时, 用户也可能需要了解这些媒体资源的相关信息, 以便能够恰当的使用和 控制被提供的媒体服务。这就要求在 MGC与 MG的相关交互过程中, 能够唯一 地标识为该媒体服务所分配的媒体资源。 而目前的 (媒体) 网关控制协议还缺 乏这样的支持机制。 发明内容
本发明实施例提供了一种标识媒体资源的方法, 使得媒体网关控制器与媒 体网关之间能够标识出为媒体服务分配的媒体资源, 以管理和控制为媒体服务 分配的媒体资源。
本发明实施例提供的一种标识媒体资源的方法, 包括:
媒体网关根据媒体网关控制器下发的命令请求操作媒体资源, 并将其操作 的媒体资源与媒体资源标识相关联;
所述媒体网关通过相应的命令响应将已关联媒体资源标识的媒体资源的信 息反馈给所述媒体网关控制器。
本发明实施例还提供了一种媒体网关控制器, 包括:
标识设置模块, 用于在请求发送模块所发送的命令请求中设置媒体资源标 识;
请求发送模块, 用于向媒体网关发送操作媒体资源的命令请求;
响应接收模块, 用于接收来自媒体网关的与所述请求发送模块所发送的操 作媒体资源的命令请求相对应的命令响应;
信息获取模块, 用于从所述响应接收模块所接收的命令响应中获取已关联 媒体资源标识的媒体资源的信息。 相应地, 本发明实施例还提供了一种媒体网关, 包括:
请求接收模块, 用于接收来自媒体网关控制器的操作媒体资源的命令请求; 标识关联模块, 用于根据媒体网关控制器下发的命令请求操作媒体资源, 并将其操作的媒体资源与媒体资源标识相关联;
响应发送模块, 用于通过相应的命令响应将已关联媒体资源标识的媒体资 源的信息反馈给所述媒体网关控制器。
实施本发明, 具有如下有益效果:
本发明实施例提供的标识媒体资源的方法, 媒体网关控制器以及媒体网关, 媒体网关将媒体资源标识与媒体资源进行关联, 使得媒体网关控制器与媒体网 关之间能够采用唯一的媒体资源标识来管理和控制媒体资源, 为用户提供媒体 服务, 使得用户也能够恰当的使用和控制被提供的媒体服务。 附图说明
图 1是现有的媒体网关和媒体网关控制器的组网示意图;
图 2是本发明实施例提供的媒体网关控制器的结构示意图;
图 3是本发明实施例提供的媒体网关的结构示意图;
图 4是本发明实施例提供的标识媒体资源的方法的第一实施例的流程示意 图;
图 5是本发明实施例提供的标识媒体资源的方法的第二实施例的流程示意 图。 具体实施方式
本发明实施例提供一种标识媒体资源的方法, 媒体网关控制器及媒体网关, 媒体网关控制器与媒体网关之间能够采用唯一的媒体资源标识来管理和控制为 媒体服务分配的媒体资源。 该媒体资源标识, 与媒体资源对应, 用于对各个媒 体资源进行区分。
本发明实施例提供的标识媒体资源的方法, 是建立在扩展(媒体) 网关控 制协议(包括但不限于网关控制协议(H.248/MeGaCo, Media Gateway Control Protocol )和媒体网关控制协议(MGCP, Media Gateway Control Protocol ) 两种 协议) 的基 上的。 参见图 2, 为本发明实施例提供的媒体网关控制器的结构示意图。
本实施例中的媒体网关控制器包括:
标识设置模块 10,用于在请求发送模块 11所发送的命令请求中设置媒体资 源标识, 若媒体资源标识取值为具体值, 则代表媒体网关控制器指示媒体网关 将操作的媒体资源与该媒体资源标识相关联, 或对该媒体资源标识已关联的媒 体资源进行操作; 若媒体资源标识设置为 "选择或" 通配符 "$" , 则表示媒体 网关控制器希望媒体网关为其操作的媒体资源确定媒体资源标识, 并将确定的 媒体资源标识和已关联媒体资源标识的媒体资源的信息反馈给媒体网关控制 器;
请求发送模块 11 , 用于向媒体网关发送操作媒体资源的命令请求; 需要说 明的是, 媒体网关控制器和媒体网关之间交互的命令的类型包括但不限于增加、 修改、 删减、 移动, 审计值、 审计能力、 通报、 服务改变等, 其命令参数被分 类为属性、 信号、 事件、 统计等等, 在需要对媒体资源进行标识时, 请求发送 模块 11向媒体网关发送的操作媒体资源的命令请求具体为对媒体资源进行分配 或调整的命令类型, 包括增加, 修改、 移动等; 一旦媒体资源和媒体资源标识 关联后, 即用媒体资源标识对媒体资源进行唯一的标识后, 在后续媒体网关控 制器与媒体网关之间交互的命令, 如增加、 修改、 删减、 移动、 审计值、 审计 能力、 通报、 服务改变等中, 就可以引用该媒体资源标识来指示所操作的媒体 资源。
响应接收模块 12,用于接收来自媒体网关与所述请求发送模块 10所发送的 操作媒体资源的命令请求相对应的命令响应。
信息获取模块 13 ,用于从所述响应接收模块 12所接收的命令响应中获取媒 体资源标识和 /或媒体资源的信息,当标识设置模块 10设置的媒体资源标识的取 值为具体值时, 则从所述响应接收模块 12中接收的命令响应中, 获取到的信息 包括与媒体资源标识相关联的媒体资源的相关信息, 当标识设置模块 10设置的 媒体资源标识属性的取值为 "选择" 通配符 "$" 时, 则从响应接收模块 12所 接收的命令响应中, 获取到的信息包括媒体网关为其操作的媒体资源确定的媒 体资源标识, 以及与该媒体资源标识相关联的媒体资源的相关信息。
需要说明的是, 媒体资源标识可以通过一个属性来表示, 该属性可以定义 在现有包(Package )或新的包中。 该属性类型为字符串 (String ), 可以采用统一资源标识 (URI , Uniform Resource Identifier ) 或者国际 ^匕资源标只 ( IRI , Internationalized Resource Identifier )。 URI可以是筒单名称或者通用资源定位(URL, Universal Resource Locator )。 URL可以使用的方案包括 file、 ftp, http、 rtsp、 rtsps和 rtspu等。 file 方案用于在 MG本地的媒体资源, ftp方案用于非 MG本地的其它设备上的媒体 资源, http 方案既可用于本地的也可用于远程的媒体资源, rtsp、 rtsps 和 rtspu 方案都用于以流形式传送的媒体资源, rtsp方案的传输使用传输控制协议(TCP, Transmission Control Protoc ), rtsps方案的传输使用传输层安全 ( TLS, Transport Layer Security ), rtspu方案的传输使用用户数据报协议(UDP, User Datagram Protocol )。 1"列^口 "rtsp:〃 server.example.com/ABC/123.rm"。
该属性类型也可以为整数(Integer ), 则其取值相当于媒体资源的编号, 其 编号方案可以按需设计。 这种整数标识与上述字符串标识中的筒单名称类似。
该属性可以应用于终端 (Termination )或终端上的流( Stream )。
参见图 3 , 为本发明实施例提供的媒体网关的结构示意图。
本实施中的媒体网关包括:
请求接收模块 20, 用于接收来自媒体网关控制器的操作媒体资源的命令请 求; 需要说明的是, 媒体网关控制器和媒体网关之间交互的命令的类型包括但 不限于增加、 修改、 删减、 移动, 审计值、 审计能力、 通报、 服务改变等, 其 命令参数被分类为属性、 信号、 事件、 统计等等, 在需要对媒体资源进行标识 时, 请求接收模块 20接收到来自媒体网关控制器的操作媒体资源的命令请求具 体为对媒体资源进行分配或调整的命令类型, 包括增加, 修改、 移动等; 一旦 媒体资源和媒体资源标识关联后, 即用媒体资源标识对媒体资源进行唯一的标 识后, 在后续媒体网关与媒体网关控制器之间交互的命令, 如增加、 修改、 删 减、 移动、 审计值、 审计能力、 通报、 服务改变等中, 就可以引用该媒体资源 标识来指示所操作的媒体资源。
标识获取模块 21 ,用于从请求接收模块 20所接收的命令请求中获取媒体资 源标识, 若取值为具体值则媒体网关将该媒体资源标识与其操作的媒体资源相 关联, 或通过该媒体资源标识获知其关联的媒体资源后进行操作; 若取值为 "选 择" 或通配符 "$" , 则媒体网关为其操作的媒体资源确定媒体资源标识, 并与 所述媒体资源相关联。 标识关联模块 22, 用于将媒体网关所操作的媒体资源与媒体资源标识相关 联, 并保存所述关联信息。
响应发送模块 23 ,用于向媒体网关控制器发送与所述请求接收模块 20所接 收的操作媒体资源的命令请求相对应的命令响应。
需要说明的是, 所述媒体资源标识可以通过一个属性来表示, 该属性可以 定义在现有包(Package )或新的包中。
该属性类型为字符串 (String ), 可以采用统一资源标识 (URI , Uniform Resource Identifier ) 或者国际 ^匕资源标只 ( IRI , Internationalized Resource Identifier )。 URI可以是筒单名称或者通用资源定位(URL, Universal Resource Locator )。 URL可以使用的方案包括 file、 ftp, http、 rtsp、 rtsps和 rtspu等。 file 方案用于在 MG本地的媒体资源, ftp方案用于非 MG本地的其它设备上的媒体 资源, http 方案既可用于本地的也可用于远程的媒体资源, rtsp、 rtsps 和 rtspu 方案都用于以流形式传送的媒体资源, rtsp 方案的传输使用 TCP (传输控制协 议 ) , rtsps方案的传输使用 TLS (传输层安全 ) , rtspu方案的传输使用 UDP (用 户数据艮协议 )。 例如 "rtsp:〃 server.example.com/ABC/123.rm,,。
该属性类型也可以为整数(Integer ), 则其取值相当于媒体资源的编号, 其 编号方案可以按需设计。 这种整数标识与上述字符串标识中的筒单名称类似。
该属性可以应用于终端 (Termination )或终端上的流( Stream )。
参见图 4,为本发明实施例提供的标识媒体资源的方法的第一实施例的流程 示意图。
首先, 通过一个属性(Property )来表示媒体资源标识, 该属性可以定义在 现有包(Package )或新的包中。 例如将该新包命名为 "媒体资源标识 (Media Resource Identification, 缩写为 mri ) 包,,, 该属性命名为 "说明 (Specification, 缩写为 spec )" , 以 "mri/spec" 的格式使用。
该属性类型为字符串 (String ), 可以采用统一资源标识 (URI , Uniform Resource Identifier ) 或者国际 ^匕资源标只 ( IRI , Internationalized Resource Identifier )。 URI可以是筒单名称或者通用资源定位(URL, Universal Resource Locator )。 URL可以使用的方案包括 file、 ftp, http, rtsp, rtsps和 rtspu等。 file 方案用于在 MG本地的媒体资源, ftp方案用于非 MG本地的其它设备上的媒体 资源, http 方案既可用于本地的也可用于远程的媒体资源, rtsp、 rtsps 和 rtspu 方案都用于以流形式传送的媒体资源, rtsp 方案的传输使用 TCP (传输控制协 议), rtsps方案的传输使用 TLS (传输层安全 ), rtspu方案的传输使用 UDP (用 户数据艮协议 )。 例如 "rtsp:〃 server.example.com/ABC/123.rm,,。
该属性类型也可以为整数(Integer ), 则其取值相当于媒体资源的编号, 其 编号方案可以按需设计。 这种整数标识与上述字符串标识中的筒单名称类似。
该属性可以应用于终端 (Termination )或终端上的流( Stream )。 若应用于 终端, 其在终端状态 (Termination State )描述符中定义。 若应用于流, 其在本 地控制 ( Local Control )描述符中定义。
该属性可读可写,也即 MGC可以向 MG设置该属性以标识指定的媒体资源, MGC也可以从 MG读取该属性以获取指定的媒体资源的标识。
本发明实施例提供的标识媒体资源的方法具体如下:
在步骤 S100, 媒体网关 (MG )接收来自媒体网关控制器(MGC ) 的操作 媒体资源的命令请求, 在该命令请求中携带表示媒体资源标识的属性, 所述属 性的取值为具体值;
在本实施中, MGC附带该属性的取值为设置的媒体资源标识, 表示 MGC 请求 MG操作的媒体资源应与该媒体资源标识相关联;
在步骤 S101 , MG根据命令请求操作媒体资源;
在步骤 S102, MG将其操作的媒体资源与媒体资源标识相关联;
在步骤 S103, MG通过相应的命令响应将已关联媒体资源标识的媒体资源 的信息媒体资源的信息反馈给 MGC;
在步骤 S104, MGC与 MG之间的后续交互命令只要包括该属性且取值为 具体值, MGC与 MG就将对该具体值所代表的媒体资源进行操作;
在步骤 S105, 后续 MGC还可从 MG读取(例如通过审计值命令 )该属性 以获取媒体资源标识。
参见图 5,为本发明实施例提供的标识媒体资源的方法的第二实施例的流程 示意图。
在步骤 S200, 媒体网关 (MG )接收来自媒体网关控制器(MGC ) 的操作 媒体资源的命令请求, 在该命令请求中携带表示媒体资源标识的属性;
在本实施例中, MGC 附带该属性, 并取值为 "选择" 通配符 "$" , 表示 MGC希望由 MG来确定该媒体资源标识,并由 MG在相应的命令响应中将确定 的媒体资源标识和已关联媒体资源标识的媒体资源的信息反馈给 MGC。
在步骤 S201 , MG根据命令请求操作媒体资源;
在步骤 S202, MG为其操作的媒体资源确定媒体资源标识, 并将其操作的 媒体资源与所述媒体资源标识相关联;
在步骤 S203 , MG通过相应的命令响应将媒体资源标识和已关联媒体资源 标识的媒体资源的信息反馈给所述 MGC。
在步骤 S204, MGC与 MG之间的后续交互命令只要包括该属性且取值为 具体值, MGC与 MG就将对该具体值所代表的媒体资源进行操作;
在步骤 S205 , 后续 MGC还可以从 MG读取(例如通过审计值命令 )该属 性以获取所述媒体资源的标识。
需要说明的是, 该媒体资源标识属性可以应用于终端或终端上的流, 而终 端又可以是代表整个 MG的^^ ( Root )终端或该 MG上的个别终端, 所以该属 性应用的不同层次就决定了其标识的媒体资源可以是属于整个 MG、 MG上的个 别终端、 或终端上的某个流的。 如果媒体资源标识在较高层次例如整个 MG上 设置, 但后续却在较低层次例如个别终端上使用, 那么视其为针对的是该个别 终端上与该媒体资源标识相关的媒体资源。
例如 MGC在下发 Add命令请求 MG分配一个终端以传送媒体 123.rm时, 在 Local Control描述符中包括了 mri/spec = "rtsp:〃 server.example.com/ ABC/123. -rmV 则 MG将为该终端分配与该媒体传送相关的媒体资源, 并与媒体资源标识 "rtsp:〃 server.example.com/ABC/123.rm"相关联, 然后在相应的命令响应中将该 媒体资源标识关联的媒体资源的信息在 Local描述符中反馈给 MGC。
需要说明的是, 本发明实施例所提及的标识媒体资源的方法, 可以应用于 媒体网关控制器与媒体网关所代表的业务与承载分离架构下的实时媒体控制 中。
实施本发明提供的标识媒体资源的方法, 通过扩展现有的 (媒体) 网关控 制协议(包括但不限于网关控制协议(H.248/MeGaCo, Media Gateway Control Protocol )和媒体网关控制协议(MGCP, Media Gateway Control Protocol ) 两种 协议), 可对媒体资源进行唯一的标识, 使得媒体网关控制器与媒体网关之间能 够采用唯一的媒体资源标识来为媒体服务管理和控制媒体资源。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本发明 实施例可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件 实施。 基于这样的理解, 本发明实施例的技术方案本质上或者说对现有技术做 出贡献的部分可以以软件产品的形式体现出来, 该计算机软件产品存储在一个 存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算机, 服 务器, 或者网络设备等)执行本发明各个实施例所述的方法。 以上所揭露的仅为本发明一种较佳实施例而已, 当然不能以此来限定本发 明之权利范围, 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、 一种标识媒体资源的方法, 其特征在于, 包括:
媒体网关根据媒体网关控制器下发的命令请求操作媒体资源, 并将其操作 的媒体资源与媒体资源标识进行关联; 网关控制器。
2、 如权利要求 1所述的标识媒体资源的方法, 其特征在于, 所述媒体网关 控制器下发的命令请求中还携带有媒体资源标识。
3、 如权利要求 2所述的标识媒体资源的方法: 其特征在于, 所述媒体网关 控制器将所述媒体资源标识设置为具体值;
相应的, 资源进行关联。
4、 如权利要求 2所述的标识媒体资源的方法: 其特征在于, 所述媒体网关 控制器将所述媒体资源标识设置为选择或通配符; 相应地, 所述将其操作的媒 体资源与媒体资源标识进行关联的步骤包括:
所述媒体网关为其操作的媒体资源确定媒体资源标识;
5、 如权利要求 4所述的标识媒体资源的方法, 其特征在于, 所述媒体网关 将所述媒体资源的信息反馈给所述媒体网关控制器具体包括:
将确定的媒体资源标识和已关联该媒体资源标识的媒体资源的信息反馈给 媒体网关控制器。
6、 如权利要求 1中任一项所述的标识媒体资源的方法, 其特征在于, 所述 用于操作媒体资源的命令请求为: 增加、 修改或移动。
7、 如权利要求 1至 5中任一项所述的标识媒体资源的方法, 其特征在于, 后续在所述媒体网关控制器与所述媒体网关之间交互的命令携带所述媒体资源 标识, 所述媒体资源标识用于指示本次命令所需操作的媒体资源。
8、 如权利要求 1至 5中任一项所述的标识媒体资源的方法, 其特征在于, 后续媒体网关控制器可以通过审计从媒体网关获取所述媒体资源标识。
9、 如权利要求 1至 5中任一项所述的标识媒体资源的方法, 其特征在于, 所述媒体资源标识通过属性表示。
10、 如权利要求 9所述的标识媒体资源的方法, 其特征在于, 所述媒体资 源标识类型为字符串或者整数。
11、 如权利要求 10所述的标识媒体资源的方法, 其特征在于, 该属性类型 为字符串时, 采用统一资源标识或者国际化资源标识。
12、 如权利要求 1至 5中任一项所述的标识媒体资源的方法, 其特征在于, 所述媒体资源标识应用于终端或终端上的流。
13、 一种媒体网关控制器, 其特征在于, 包括:
标识设置模块, 用于在请求发送模块所发送的命令请求中设置媒体资源标 识;
请求发送模块, 用于向媒体网关发送操作媒体资源的命令请求;
响应接收模块, 用于接收来自媒体网关的与所述请求发送模块所发送的操 作媒体资源的命令请求相对应的命令响应;
信息获取模块, 用于从所述响应接收模块所接收的命令响应中获取已关联 媒体资源标识的媒体资源的信息。
14、 如权利要求 13所述的媒体网关控制器, 其特征在于, 所述标识设置模 块设置所述媒体资源标识取值为具体值, 指示媒体网关将该媒体资源标识与所 述媒体资源相关联, 或对该媒体资源标识已关联的媒体资源进行操作; 或者设 置所述媒体资源标识设置为选择或通配符, 指示由媒体网关为其操作的媒体资 源确定媒体资源标识, 并在相应的命令响应中将确定的媒体资源标识和已关联 媒体资源标识的媒体资源的信息反馈给媒体网关控制器。
15、 一种媒体网关, 其特征在于, 包括:
请求接收模块, 用于接收来自媒体网关控制器的操作媒体资源的命令请求; 标识关联模块, 用于根据媒体网关控制器下发的命令请求, 操作媒体资源, 并将其操作的媒体资源与媒体资源标识进行关联;
响应发送模块, 用于通过相应的命令响应将所述的媒体资源的信息反馈给 所述媒体网关控制器。
16、 如权利要求 15所述的媒体网关, 其特征在于, 所述媒体网关控制器下 发的命令请求中还携带有媒体资源标识; 所述媒体网关还包括:
标识获取模块, 用于从所述请求接收模块所接收的命令请求中获取媒体资 源标识。
17、 如权利要求 16所述的媒体网关, 其特征在于, 所述标识获取模块从所 述请求接收模块所接收的命令请求中获取媒体资源标识, 若媒体资源标识取值 为具体值, 则所述标识关联模块将该媒体资源标识与所述媒体资源进行关联, 或通过该媒体资源标识获知其关联的媒体资源后进行操作; 若媒体资源标识设 置为选择或通配符, 则所述标识关联模块为其操作的媒体资源确定媒体资源标 识, 并与所述媒体资源相关联。
PCT/CN2008/073634 2007-12-29 2008-12-22 标识媒体资源的方法、媒体网关及媒体网关控制器 WO2009092251A1 (zh)

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CN106250214B (zh) * 2015-06-05 2019-11-26 苹果公司 资源受限设备上的媒体分析和处理构架
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005122606A1 (fr) * 2004-06-11 2005-12-22 Utstarcom Telecom Co., Ltd. Procede et appareil permettant la gestion des ressources multimedia dans un commutateur logiciel (soft-switch)
US20070116018A1 (en) * 2005-11-18 2007-05-24 Santera Systems, Inc. Methods, systems, and computer program products for distributed resource allocation among clustered media gateways in a communications network
CN1984128A (zh) * 2005-12-16 2007-06-20 华为技术有限公司 一种基于网关资源组的信息报告方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001078331A1 (en) * 2000-04-05 2001-10-18 Nokia Corporation Communication system comprising a gateway device for handling connections
US6766377B1 (en) * 2000-08-24 2004-07-20 3Com Corporation Media gateway proxy
AUPR754001A0 (en) * 2001-09-06 2001-09-27 Telefonaktiebolaget Lm Ericsson (Publ) Method and system of enabling a generic telecommunications service in gateway control protocols
JP3662896B2 (ja) * 2002-05-27 2005-06-22 エヌ・ティ・ティ・コムウェア株式会社 コンタクトセンタシステム
CN100373898C (zh) * 2003-08-06 2008-03-05 中兴通讯股份有限公司 基于megaco协议的信令代理实现方法
CN1317873C (zh) * 2003-08-19 2007-05-23 中兴通讯股份有限公司 基于媒体网关控制协议的信令代理实现方法
US9258431B2 (en) * 2006-12-28 2016-02-09 Genband Us Llc Methods, systems, and computer program products for providing a dynamic and flexible media gateway termination identifier
CN101471900A (zh) * 2007-12-25 2009-07-01 华为技术有限公司 媒体资源标识能力交互方法及媒体网关控制器和媒体网关

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005122606A1 (fr) * 2004-06-11 2005-12-22 Utstarcom Telecom Co., Ltd. Procede et appareil permettant la gestion des ressources multimedia dans un commutateur logiciel (soft-switch)
US20070116018A1 (en) * 2005-11-18 2007-05-24 Santera Systems, Inc. Methods, systems, and computer program products for distributed resource allocation among clustered media gateways in a communications network
CN1984128A (zh) * 2005-12-16 2007-06-20 华为技术有限公司 一种基于网关资源组的信息报告方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2222047A4 *

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