WO2008071060A1 - Procédé d'optimisation de l'accès au réseau, et dispositif et système de passerelle média virtuelle - Google Patents

Procédé d'optimisation de l'accès au réseau, et dispositif et système de passerelle média virtuelle Download PDF

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Publication number
WO2008071060A1
WO2008071060A1 PCT/CN2007/003221 CN2007003221W WO2008071060A1 WO 2008071060 A1 WO2008071060 A1 WO 2008071060A1 CN 2007003221 W CN2007003221 W CN 2007003221W WO 2008071060 A1 WO2008071060 A1 WO 2008071060A1
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Prior art keywords
specified
media gateway
endpoints
gateway
optimization
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PCT/CN2007/003221
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English (en)
French (fr)
Inventor
Haopeng Zhu
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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 EP07816830A priority Critical patent/EP2093930A4/en
Publication of WO2008071060A1 publication Critical patent/WO2008071060A1/zh

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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
    • 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
    • H04L65/80Responding to QoS

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for optimizing a network connection of a virtual media gateway. Background technique
  • a UTRAN UMTS Terrestrial Radio Access Network
  • MGW Media Gateway, Media Gateway
  • MSC Serve Mobile-services Switching Centre Server (102) is connected
  • BSS Base Station Subsystem
  • the SCP Service Control Point
  • the CAP interface is connected to the MSC Server 102 and the GMSC Server (Gateway Mobile Switching Center Server) 105.
  • the HLR Home Location Register
  • the GMSC Server 105 is connected.
  • the MSC Server 102 is connected to the GMSC Server 105 through an Nc interface, where the Nc interface is based on a Bearer Independent Call Control (BICC) signaling, and is used to complete establishment and release of inter-office bearers, and can be used. Control a variety of bearers, including IP, ATM.
  • BICC Bearer Independent Call Control
  • the MSC Server 102 and the GMSC Server 105 control the MGWIOI through the Mc interface, and the Mc interface generally uses H.248 signaling.
  • Each MGWIOI is connected to each other through an Nb interface, and the MGW 101 is also connected to a PSTN (Public Switch Telephone Network) 107.
  • PSTN Public Switch Telephone Network
  • a physical MGW can be virtualized into multiple virtual media gateways.
  • Each virtual media gateway is controlled by an MSC Server. See the network structure diagram shown in Figure 2, where the physical media gateway MGW1 virtualizes into virtual media gateways VGMW11 and VGMW12, physical media gateway MGW2 virtualizes into virtual media gateway VGMW21 and VGMW22.
  • VGMWll and VGMW21 are controlled by the mobile switching center server MSC Server1, and VGMW12 and VGMW22 are controlled by the mobile switching center server MSC Server2.
  • the BICC can indicate the gateway identifier selected by the local end in the call signaling. After receiving the call signaling, the gateway can optimize the gateway identifier used by the local office according to the gateway identifier selected by the office.
  • the call flow is as follows:
  • Step 300 The mobile switching center server MSC Server1 negotiates with the virtual media gateway VGMWll to establish a bearer connection with the T2 endpoint in C1.
  • Step 301 The mobile switching center server MSC Server1 sends a BICC call signaling to the mobile switching center server MSC Server2, where the signaling indicates the gateway identifier of the virtual media gateway VGMW11.
  • Step 302 After receiving the signaling, the mobile switching center server MSC Server2 preferably establishes a bearer connection by using the T3 of the virtual media gateway VGMW12 in the C2 according to the gateway identifier of the virtual media gateway VGMW11 indicated by the signaling, so that the bearer is established. On the same physical media gateway MGW1.
  • the codec converter TC Trans Coding
  • PCM Pulse Code Modulation
  • suitable Compressed codecs such as AMR, G.729, etc.
  • the invention provides a method, a device and a system for optimizing a network connection of a virtual media gateway, which are used for solving
  • problems of waste of codec converter resources, waste of network transmission resources, and degradation of voice quality there are problems of waste of codec converter resources, waste of network transmission resources, and degradation of voice quality.
  • a method for optimizing a network connection by a virtual media gateway comprising the steps of:
  • the network entity controlling the virtual media gateway respectively instructs the virtual media gateway in the same media gateway to activate the specified endpoint in the specified physical context
  • the media gateway After determining, by the media gateway, that there is a connection relationship between the specified physical contexts, the media gateway directly connects the specified endpoints.
  • the media gateway when the media gateway directly connects the specified endpoints, if the specified endpoints are respectively connected to the codec converter, respectively, the designated endpoints and the codec converter are cut off. connection.
  • the network entity respectively instructs the virtual media gateway in the media gateway to deactivate the specified endpoint in the specified physical context according to the service change, and the media gateway cuts off the specified endpoint according to the deactivation optimization indication
  • the media gateway directly connects the specified endpoints, the other endpoints that are bypassed are reserved, and the original bearer connection is restored by the reserved other endpoints when the deactivation optimization is performed.
  • the network entity instructs the media gateway to activate optimization or deactivation through an augmented protocol message to optimize the endpoint specified in the specified physical context.
  • the media gateway reports the activation optimization or deactivation optimization event to the network entity after activating the optimization or deactivating the endpoint specified in the specified physical context.
  • the media gateway smoothly switches the session when the optimization optimizes or deactivates the endpoint specified in the optimized physical context.
  • a gateway device configured to perform bearer-related operations and media stream processing according to an indication of a control entity, including at least two virtual gateway devices, including:
  • a receiving unit configured to receive an indication of a control entity, where the indication is to activate an endpoint specified in a physical context specified by the optimized virtual gateway device;
  • a determining unit configured to determine whether a connection relationship exists between the specified physical contexts;
  • a processing unit configured to directly connect the specified endpoints when determining a connection relationship between the specified physical contexts.
  • the processing unit is further configured to cut off a connection between the specified endpoints and establish a bearer connection by using other endpoints, when the indication is to deactivate the endpoint specified in the specified physical context.
  • a network system comprising: a media gateway, a network entity connected to the media gateway and controlling a virtual media gateway in the media gateway; the network entity, configured to respectively indicate that the virtual media gateway in the same media gateway activates and optimizes the specified physical entity An endpoint specified in the context; the media gateway is configured to receive an activation optimization indication of the network entity, and directly connect the specified endpoints after determining that there is a connection relationship between the specified physical contexts.
  • the media gateway directly connects the specified endpoints, if the specified endpoints are respectively connected to the codec converter, the connection between the designated endpoint and the codec converter is respectively cut off.
  • the network entity respectively instructs the virtual media gateway in the media gateway to deactivate the specified endpoint in the specified physical context according to the service change, and the media gateway cuts off the specified endpoint according to the deactivation optimization indication
  • the media gateway directly connects the specified endpoints, the other endpoints that are bypassed are reserved, and the original bearer connection is restored by the reserved other endpoints when the deactivation optimization is performed.
  • the invention realizes the optimal connection between the physical contexts of the virtual media gateway by connecting two endpoints specified in the physical context specified by the mobile switching center server in the two virtual media gateways of the same media gateway, without occupying the codec converter Resources also do not need to occupy network resources such as IP/ATM for transmission, which greatly improves voice quality.
  • FIG. 1 is a schematic diagram of a circuit domain networking structure of a mobile softswitch based on a separate architecture in the prior art
  • FIG. 2 is a schematic diagram of a networking structure of multiple virtual media gateways and a mobile switching center server in the background art
  • 3 is a call flow diagram in the background art
  • FIG. 5 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a media gateway according to an embodiment of the present invention
  • FIG. 8 is a flowchart of activation optimization and deactivation optimization of a virtual media gateway according to an embodiment of the present invention. detailed description
  • the UMTS Universal Mobile Telecommunications System
  • the media gateway activates the optimization or deactivation to optimize the specified endpoint in the specified physical context according to the indication of the network entity controlling the virtual media gateway;
  • CDMA Code Division Multiple Addressing
  • the structure of a network system in this embodiment includes: a Media Gateway (MGGW) 500, and is connected to the media gateway 500 and controls a virtual media gateway (Virtual Media Gateway, VMGW) in the media gateway 500.
  • a network entity 501 configured to indicate that the virtual media gateway in the same media gateway activates the specified endpoint in the specified physical context, and the media gateway 500 is configured to receive the activation of the network entity. And optimizing the indication, and determining, according to the bearer-related information (including the IP address and the port number corresponding to the endpoint), whether there is a connection relationship between the specified physical contexts, and directly connecting the specified endpoints when determining that the connection relationship exists.
  • the network entity 501 is a Mobile-services Switching Centre Server (MSC Server) or an MSCe (in the CDMA2000 system).
  • MSC Server Mobile-services Switching Centre Server
  • MSCe in the CDMA2000 system
  • two mobile switching center servers are instructed to indicate that two virtual media gateways in the same media gateway activate the specified endpoint in the specified physical context, and two or more virtual media gateways are activated.
  • the optimized processing flow is similar.
  • the mobile switching center server 501 After the inter-authority bearer is established in the media gateway 500, the mobile switching center server 501 first determines whether the inter-office bearer is established on the two virtual media gateways 5000, 5001 of the media gateway 500, and When it is determined that the inter-office bearer is established on the two virtual media gateways 5000, 5001 of the media gateway 500, an activation optimization indication is sent to the media gateway 500, that is, the designated of the two virtual media gateways 5000, 5001 Endpoints in the physical context are connected, and the endpoints are endpoints designated by the mobile switching center server 501.
  • the media gateway 500 After receiving the activation optimization indication of the mobile switching center server 501, the media gateway 500 first determines whether the activation optimization condition is met, that is, whether there is a connection relationship between the specified physical contexts, and determines the specified physicality. When there is a connection relationship between the contexts, the two endpoints specified in the physical context specified in the two virtual media gateways 5000, 5001 are connected. At the same time, the media gateway 500 also bypasses the original bearer connection, that is, when the specified endpoints are respectively connected to the codec converter (TransCoding, TC), respectively, the designated endpoints and the codec converter are cut off. Connect to release the resources of the codec converter.
  • TransCoding TransCoding
  • the mobile switching center server 501 may send a deactivation optimization indication to the two virtual media gateways 5000, 5001 in the media gateway 500 according to a service change (such as a handover, etc.), that is, the mobile switching center server 501 is cut off.
  • a service change such as a handover, etc.
  • the connection between the endpoints, and the bearer connection is established through the other endpoints in the physical context of the two virtual media gateways 5000, 5001.
  • the mobile switching center server 501 delivers an activation and deactivation optimization indication to the two virtual media gateways 5000, 5001 via an augmented protocol message (e.g., an H.248 message).
  • an augmented protocol message e.g., an H.248 message
  • the media gateway 500 retains other endpoints that are bypassed in the physical context of the original two virtual media gateways 5000, 5001 when the optimization is activated, and the reservation is performed when the media gateway 500 deactivates the optimization.
  • the other endpoints restore the original bearer connection, thus quickly deactivating the optimization.
  • the media gateway 500 reports the activation optimization or deactivation optimization event to the mobile switching center server 501 after completing the operation of optimizing the optimization or deactivating the endpoint specified in the specified physical context.
  • the media gateway 500 smoothly switches the voice channel when the optimization or deactivation optimizes the specified endpoint in the specified physical context, such as continuing to retain the original voice during the handover process. Road, the original voice channel is disconnected after the switch is completed.
  • the media gateway 500 in this embodiment specifically includes: a receiving unit 600, a determining unit 601, and a processing unit 602.
  • the receiving unit 600 is configured to receive an indication of a mobile switching center server, where the indication is activated.
  • the processing unit 602 is further configured to cut off the connection between the specified endpoints and establish a bearer connection through other endpoints.
  • the media gateway 500 further includes a sending unit 603, configured to report the event of the activation optimization and deactivation optimization to the mobile switching center server 500.
  • the virtual media gateway 1 and the virtual media gateway 2 in the same media gateway are taken as an example.
  • the virtual media gateway 1 and the virtual media gateway 2 are respectively subjected to the mobile switching center server 1 and mobile.
  • the control of the switching center server 2 that is, the physical context specified by the mobile switching center server in the virtual media gateway 1 is C1, wherein the endpoint to be optimized is T1, and the endpoint of the original bearer connection is T2, which is called the virtual medium switch 2 mobile switching center server.
  • the specified physical context is C2, where the endpoint to be optimized is T4, and the endpoint of the original bearer connection is T4.
  • FIG. 7 for the bearer topology between the optimized virtual media gateways.
  • the process of the virtual media gateway activation optimization and deactivation optimization in this embodiment is as follows:
  • Step 800 The mobile switching center server 1 negotiates with the virtual media gateway 1 to establish a bearer connection with the ⁇ 2 endpoint in C1.
  • Step 801 The mobile switching center server 1 sends a BICC call signaling to the mobile switching center server 2, where the signaling indicates the gateway identifier of the virtual media gateway 1.
  • Step 802 After receiving the signaling, the mobile switching center server 2, according to the gateway identifier of the virtual media gateway 1 indicated by the signaling, preferably the virtual media gateway 2 establishes a bearer connection with ⁇ 3 in C2, so that the bearer is established in On the same physical media gateway.
  • Step 803 controlling the mobile switching center server 1 of the virtual media gateway 1 and controlling the virtual media
  • the mobile switching center server 2 of the gateway 2 determines whether the virtual media gateway 1 and the virtual media gateway 2 belong to the same media gateway.
  • Steps 804a-804b after determining that the virtual media gateways 1, 2 belong to the same media gateway, the mobile switching center server 1, 2 sends an activation optimization indication to the virtual media gateways 1, 2, and activates and optimizes the specified physical contexts C1 and C2. End points T1 and T4 specified in .
  • Step 805 After receiving the activation optimization indication, the same media gateway determines, according to the bearer-related information (including the IP address and port number corresponding to the endpoint), whether the virtual media gateway 1 and 2 meet the optimized condition, that is, the physical context C1. Whether there is a connection relationship with C2.
  • the bearer-related information including the IP address and port number corresponding to the endpoint
  • Step 806 When the same media gateway determines that there is a connection relationship between the physical contexts C1 and C2 of the virtual media gateways 1, 2, the optimization is activated, that is, T1 in C1 is connected to T4 in C2.
  • Step 807 After the activation optimization is completed, the same media gateway reports the activation optimization event to the mobile switching center server 1, 2.
  • Steps 808a-808b when the service changes (if a handover occurs), the mobile switching center server 1 that controls the virtual media gateway 1 and the mobile switching center server 2 that controls the virtual media gateway 2 deliver the information to the virtual media gateway 1 and the virtual media gateway 2.
  • the optimization indication is deactivated, ie the endpoints T1 and T4 specified in the specified physical contexts C1 and C2 are deactivated.
  • Step 809 After receiving the deactivation optimization indication, the same media gateway deactivates the optimization, that is, applies for codec converter resources, and cuts the connection between T1 in C1 and ⁇ 4 in C2, and converts through codec conversion.
  • T1 and ⁇ 2 are connected, and ⁇ 3 and ⁇ 4 are connected through a codec converter, and T2 and T3 are connected through an IP/ATM network.
  • Step 810 After the deactivation optimization is completed, the same media gateway reports the deactivation optimization event to the mobile switching center server 1, 2.
  • step 806 the same media gateway disconnects T1 in T1 and T4 in C2, and if T1 and T4 are respectively connected to the codec converter, the T1 and T4 and the codec are turned off. Connection to release the resources of the codec converter; the same media gateway also retains the T2 and T3 endpoints that were originally connected to the IP/ATM network, so as to quickly complete the deactivation optimization operation Work.
  • the same media gateway restores the original bearer connection through the T2 and T3 endpoints, where the T2 and T3 endpoints are the bypassed two endpoints reserved by the same media gateway when the optimization is activated.
  • the optimization can be deactivated quickly, and the bearer connection can be re-established through other endpoints.
  • the method is not limited thereto, and the above method is also applicable to a network device similar to the function of the media gateway in other communication systems.
  • the present invention implements an optimized connection between the physical contexts of the virtual media gateway by connecting two endpoints specified in the physical context specified by the mobile switching center server of the two virtual media gateways of the same media gateway. It does not need to occupy codec converter resources, and does not need to occupy network resources such as IP/ATM for transmission, which greatly improves voice quality. Further, when the virtual media gateway is activated and optimized, the endpoints originally connected to the IP/ATM network are retained, thereby making virtual The media gateway is able to quickly deactivate optimization.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Description

虚拟媒体网关优化接网的方法、 设备及系统 技术领域
本发明涉及通信技术领域, 尤其涉及虚拟媒体网关优化接网的方法、 设 备及系统。 背景技术
参阅图 1所示, 基于分离架构移动软交换的电路域组网结构中, UTRAN ( UMTS Terrestrial Radio Access Network, UMTS陆地无线接入网) 100通过 Iu接口与 MGW( Media Gateway ,媒体网关) 101和 MSC Serve Mobile-services Switching Centre Server, 移动交换中心服务器) 102连接, BSS ( Base Station Subsystem,基站子系统)103通过 A接口与 MGWIOI和 MSC Server 102连接, SCP ( Service Control Point,业务控制点) 104通过 CAP接口与 MSC Server 102 和 GMSC Server ( Gateway Mobile Switching Center Serve, 关口移动交换中心 服务器) 105连接, HLR ( Home Location Register, 归属位置寄存器) 106通 过 D接口与 MSC Server 102连接, 通过 C接口与 GMSC Server 105连接。
MSC Server 102与 GMSC Server 105通过 Nc接口相连, 其中, 所述 Nc接 口基于 BICC ( Bearer Independent Call Control, 承载无关的呼叫控制协议 )信 令, 用于完成局间承载的建立和释放, 并且可以用于控制多种承载, 包括 IP、 ATM。 MSC Server 102和 GMSC Serverl05通过 Mc接口控制 MGWIOI , Mc 接口一般釆用 H.248信令。 各 MGWIOI相互之间通过 Nb接口相连, 另外, MGW101还与 PSTN ( Public Switch Telephone Network,公共交换电话网) 107 相连接。
出于容灾等考虑, 一个物理的 MGW可以虚拟成多个虚拟的媒体网关, 每个虚拟的媒体网关受一个 MSC Server的控制, 参阅图 2所示的组网结构示 意图, 其中, 物理媒体网关 MGW1 虚拟成虚拟媒体网关 VGMW11 和 VGMW12 , 物理媒体网关 MGW2 虚拟成虚拟媒体网关 VGMW21 和 VGMW22。 VGMWll和 VGMW21受移动交换中心服务器 MSC Serverl的控 制, VGMW12和 VGMW22受移动交换中心服务器 MSC Server2的控制。
由于虚拟媒体网关的引入, 需要考虑对局间呼叫进行优化。 现有技术中, BICC在呼叫信令中可以指示本端选择的网关标识, 当对局收到呼叫信令后, 可以根据对局选择的网关标识优选本局使用的网关标识, 因此可以优选到同 一个物理网关上, 参阅图 3所示, 呼叫流程如下:
步骤 300、 移动交换中心服务器 MSC Serverl与虚拟媒体网关 VGMWll 协商以 C1中的 T2端点建立承载连接。
步骤 301、移动交换中心服务器 MSC Serverl向移动交换中心服务器 MSC Server2发送 BICC呼叫信令, 该信令中指示虚拟媒体网关 VGMWll的网关 标识。
步骤 302、移动交换中心服务器 MSC Server2在接收到所述信令后, 根据 所述信令指示的虚拟媒体网关 VGMWll 的网关标识优选虚拟媒体网关 VGMW12以 C2中的 T3建立承载连接,从而使承载建立在同一个物理媒体网 关 MGW1上。
图 3所示流程中的的 C、 T分别表示 H.248协议概念中的 Context (上下 文 )和 Termination (端点 )。
但是, 上述方法只能做到网关的优选, 而无法做到联网的优化, 以 2G的 场景为例, 同一物理媒体网关的两个虚拟媒体网关之间的承载拓朴如图 4所 示, 其中编解码转换器 TC ( Trans Coding )主要完成编解码的转换, 即将语 音从 TDM ( Time Division Multiplexing, 时分复用) 的 PCM ( Pulse Code Modulation, 脉冲编码调制 )码流(G.711 )转换成适合在 IP/ATM承载网中传 输的压缩编解码(如 AMR、 G.729等)。 可见, 釆用上述方法浪费了编解码转 换器 TC的资源、 浪费了网络资源进行传输、 降低了语音的质量。 发明内容
本发明提供一种虚拟媒体网关优化接网的方法、 设备及系统, 用以解决 现有技术中存在编解码转换器资源浪费、 网络传输资源浪费及语音质量降低 的问题。
本发明提供以下技术方案:
一种虚拟媒体网关优化接网的方法, 该方法包括步骤:
控制虚拟媒体网关的网络实体分别指示同一媒体网关中的虚拟媒体网关 激活优化指定的物理上下文中指定的端点;
所述媒体网关在确定所述指定的物理上下文之间存在连接关系后, 将所 述指定的端点直接相连接。
根据上述方法, 所述媒体网关在将所述指定的端点直接相连接时, 若所 述指定的端点已分别与编解码转换器相连接, 则分别切断所述指定的端点与 编解码转换器的连接。
所述网络实体根据业务变化分别指示所述媒体网关中的虚拟媒体网关去 激活优化所述指定的物理上下文中指定的端点, 所述媒体网关根据所述去激 活优化指示切断所述指定的端点之间的连接, 并通过其它端点建立承载连接。
所述媒体网关在将所述指定的端点直接相连接时, 保留被旁路的其它端 点, 并在执行去激活优化时通过所述保留的其它端点恢复原有的承载连接。
所述网络实体通过扩充的协议消息指示所述媒体网关激活优化或去激活 优化指定的物理上下文中指定的端点。
所述媒体网关在激活优化或去激活优化指定的物理上下文中指定的端点 后, 向所述网络实体上报所述激活优化或去激活优化的事件。
所述媒体网关在激活优化或去激活优化指定的物理上下文中指定的端点 时平滑切换话路。
一种网关设备, 用于根据控制实体的指示进行承载相关操作和媒体流处 理; 包括至少两个虚拟网关设备; 包括:
接收单元, 用于接收控制实体的指示, 所述指示为激活优化虚拟网关设 备指定的物理上下文中指定的端点;
判断单元, 用于判断所述指定的物理上下文之间是否存在连接关系; 处理单元, 用于在确定所述指定的物理上下文之间存在连接关系时, 将 所述指定的端点直接相连接。
其中, 所述指示为去激活优化所述指定的物理上下文中指定的端点时, 所述处理单元还用于切断所述指定的端点之间的连接, 并通过其它端点建立 承载连接。
一种网络系统, 包括: 媒体网关, 与媒体网关连接并控制该媒体网关中 的虚拟媒体网关的网络实体; 所述网络实体, 用于分别指示同一媒体网关中 的虚拟媒体网关激活优化指定的物理上下文中指定的端点; 所述媒体网关, 用于接收到所述网络实体的激活优化指示, 并在确定所述指定的物理上下文 之间存在连接关系后, 将所述指定的端点直接相连接。
其中, 所述媒体网关在将所述指定的端点直接相连接时, 若所述指定的 端点已分别与编解码转换器相连接, 则分别切断所述指定的端点与编解码转 换器的连接。
所述网络实体根据业务变化分别指示所述媒体网关中的虚拟媒体网关去 激活优化所述指定的物理上下文中指定的端点, 所述媒体网关根据所述去激 活优化指示切断所述指定的端点之间的连接, 并通过其它端点建立承载连接。
所述媒体网关在将所述指定的端点直接相连接时, 保留被旁路的其它端 点, 并在执行去激活优化时通过所述保留的其它端点恢复原有的承载连接。
本发明通过将同一媒体网关的两个虚拟媒体网关中移动交换中心服务器 指定的物理上下文中指定的两个端点相连接, 实现了虚拟媒体网关物理上下 文之间的优化接网, 无需占用编解码转换器资源,也无需占用 IP/ATM等网络 资源进行传输, 大大提高了语音质量。 附图说明
图 1为背景技术中基于分离架构移动软交换的电路域组网结构示意图; 图 2 为背景技术中多个虚拟的媒体网关与移动交换中心服务器的组网结 构示意图; 图 3为背景技术中的呼叫流程图;
图 4为背景技术中的虚拟媒体网关之间的承载拓朴图;
图 5为本发明实施例中网络系统的结构示意图;
图 6为本发明实施例中媒体网关的结构示意图; 图 8为本发明实施例中虚拟媒体网关激活优化和去激活优化的流程图。 具体实施方式
本实施例中 , 以 UMTS ( Universal Mobile Telecommunications System, 通 用移动通信系统) 为例说明媒体网关根据控制虚拟媒体网关的网络实体的指 示,激活优化或去激活优化指定的物理上下文中指定的端点;在 CDMA( Code Division Multiple Addressing, 码分多址)软交换或固定软交换中的处理类似。
本实施例中的一种网络系统的结构参阅图 5所示,包括:媒体网关(Media Gateway, MGW ) 500, 与媒体网关 500连接并控制媒体网关 500中的虚拟媒 体网关( Virtual Media Gateway, VMGW )的网络实体 501;所述网络实体 501 , 用于分别指示同一媒体网关中的虚拟媒体网关激活优化指定的物理上下文中 指定的端点; 所述媒体网关 500 , 用于接收所述网络实体的激活优化指示, 并 根据承载相关信息 (包括端点对应的 IP地址和端口号)判断所述指定的物理 上下文之间是否存在连接关系, 在确定存在连接关系时将所述指定的端点直 接相连接。 所述网络实体 501 为移动交换中心服务器 (Mobile-services Switching Centre Server, MSC Server )或 MSCe ( CDMA2000系统中), 图 5 中以移动交换中心服务器为例说明本实施例中的网络系统。
为了清楚的说明本发明方法, 下面以两个移动交换中心服务器指示同一 媒体网关中的两个虚拟媒体网关激活优化指定的物理上下文中指定的端点为 例进行说明, 两个以上虚拟媒体网关进行激活优化的处理流程与此类似。
当局间承载建立在媒体网关 500后, 移动交换中心服务器 501先判断局 间承载是否建立在所述媒体网关 500的两个虚拟媒体网关 5000、 5001上, 并 在确定局间承载建立在所述媒体网关 500的两个虚拟媒体网关 5000、 5001上 时,向所述媒体网关 500下发激活优化指示,即将所述两个虚拟媒体网关 5000、 5001 的指定的物理上下文中的端点相连接, 所述端点为所述移动交换中心服 务器 501指定的端点。
所述媒体网关 500在接收到所述移动交换中心服务器 501 的激活优化指 示后, 先判断满足激活优化的条件即所述指定的物理上下文之间是否存在连 接关系, 并在确定所述指定的物理上下文之间存在连接关系时, 将两个虚拟 媒体网关 5000、 5001中所述指定的物理上下文中指定的两个端点相连接。 同 时, 所述媒体网关 500还旁路原来的承载连接, 即在所述指定的端点已分别 与编解码转换器(TransCoding, TC )连接时, 分别切断所述指定的端点与编 解码转换器的连接, 以释放编解码转换器的资源。
所述移动交换中心服务器 501 可根据业务变化(如发生切换等) 向所述 媒体网关 500中的两个虚拟媒体网关 5000、 5001下发去激活优化指示, 即切 断所述移动交换中心服务器 501 指定的端点之间的连接, 并通过两个虚拟媒 体网关 5000、 5001的物理上下文中的其它端点建立承载连接。 所述移动交换 中心服务器 501通过扩充的协议消息 (如 H.248消息) 向所述两个虚拟媒体 网关 5000、 5001下发激活和去激活优化指示。
较佳的, 所述媒体网关 500在激活优化时, 保留原来两个虚拟媒体网关 5000、 5001的物理上下文中被旁路的其它端点, 在所述媒体网关 500去激活 优化时, 通过所述保留的其它端点恢复原有的承载连接, 从而快速的去激活 优化。
所述媒体网关 500在完成激活优化或去激活优化指定的物理上下文中指 定的端点的操作后, 向所述移动交换中心服务器 501 上报所述激活优化或去 激活优化的事件。
较佳的, 为了尽量减小对用户的干扰, 所述媒体网关 500在激活优化或 去激活优化指定的物理上下文中指定的端点时, 还平滑切换话路, 如在切换 过程中继续保留原来的话路, 在完成切换后才断开原来的话路。 参阅图 6所示, 本实施例中的媒体网关 500具体包括: 接收单元 600、 判 断单元 601、 处理单元 602; 所述接收单元 600, 用于接收移动交换中心服务 器的指示, 所述指示为激活优化同一媒体网关中的两个虚拟媒体网关指定的 物理上下文中指定的端点; 所述判断单元 601 , 用于判断所述指定的物理上下 文之间是否存在连接关系; 所述处理单元 602, 用于在确定所述指定的物理上 下文之间存在连接关系时, 将所述指定的端点相连接。 所述指示为去激活优 化所述指定的端点时, 所述处理单元 602还用于切断所述指定的端点之间的 连接, 并通过其它端点建立承载连接。 另外, 所述媒体网关 500还包括一发 送单元 603 ,用于向移动交换中心服务器 500上报所述激活优化和去激活优化 的事件。
为了更清楚地说明本发明方法,下面以同一媒体网关中的虚拟媒体网关 1 和虚拟媒体网关 2为例进行说明, 其中, 虚拟媒体网关 1和虚拟媒体网关 2 分别受移动交换中心服务器 1和移动交换中心服务器 2的控制, 称虚拟媒体 网关 1中移动交换中心服务器指定的物理上下文为 C1 , 其中指定待优化的端 点为 T1 , 原有承载连接的端点为 T2, 称虚拟媒体关 2中移动交换中心服务器 指定的物理上下文为 C2, 其中指定待优化的端点为 T4 ,原有承载连接的端点 为 T4。 参阅图 7所示为优化后的虚拟媒体网关之间的承载拓朴图。
参阅图 8所示, 本实施例中虚拟媒体网关激活优化和去激活优化的处理 流程如下:
步骤 800、 移动交换中心服务器 1与虚拟媒体网关 1协商以 C1 中的 Τ2 端点建立承载连接。
步骤 801、移动交换中心服务器 1向移动交换中心服务器 2发送 BICC呼 叫信令, 该信令中指示虚拟媒体网关 1的网关标识。
步骤 802、移动交换中心服务器 2在接收到所述信令后,根据所述信令指 示的虚拟媒体网关 1的网关标识优选虚拟媒体网关 2以 C2中的 Τ3建立承载 连接, 从而使承载建立在同一个物理媒体网关上。
步骤 803、控制虚拟媒体网关 1的移动交换中心服务器 1和控制虚拟媒体 网关 2的移动交换中心服务器 2判断虚拟媒体网关 1和虚拟媒体网关 2是否 属于同一媒体网关。
步骤 804a-804b、 所述移动交换中心服务器 1、 2在确定虚拟媒体网关 1、 2属于同一媒体网关后, 向虚拟媒体网关 1、 2下发激活优化指示, 激活优化 指定的物理上下文 C1和 C2中指定的端点 T1和 T4。
步骤 805、 所述同一媒体网关在接收到所述激活优化指示后, 根据承载相 关信息 (包括端点对应的 IP地址和端口号)判断虚拟媒体网关 1、 2是否满足 优化的条件, 即物理上下文 C1和 C2之间是否存在连接关系。
步骤 806、 所述同一媒体网关在确定虚拟媒体网关 1、 2的物理上下文 C1 与 C2之间存在连接关系时, 激活优化, 即将 C1中的 T1与 C2中的 T4相连 接。
步骤 807、 所述同一媒体网关在激活优化完成后, 向所述移动交换中心服 务器 1、 2上报所作的激活优化事件。
步骤 808a-808b、 当业务变化(如发生切换)时, 控制虚拟媒体网关 1的 移动交换中心服务器 1和控制虚拟媒体网关 2的移动交换中心服务器 2向虚 拟媒体网关 1和虚拟媒体网关 2下发去激活优化指示, 即去激活优化指定的 物理上下文 C1和 C2中指定的端点 T1和 T4。
步骤 809、 所述同一媒体网关在接收到所述去激活优化指示后, 去激活优 化, 即申请编解码转换器资源, 切断 C1中的 T1与 C2中的 Τ4之间的连接, 通过编解码转换器将 T1和 Τ2相连接,通过编解码转换器将 Τ3和 Τ4相连接, 通过 IP/ATM网络将 T2和 T3相连接。
步骤 810、 所述同一媒体网关在去激活优化完成后, 向所述移动交换中心 服务器 1、 2上报所作的去激活优化事件。
在步骤 806中, 所述同一媒体网关在将 C1中的 T1与 C2中的 T4相连接 的同时, 若 T1和 T4已分别与编解码转换器相连接, 则切断 T1和 T4与编解 码转换器的连接, 以释放编解码转换器的资源; 所述同一媒体网关还保留原 来与 IP/ATM网络连接的 T2和 T3端点, 以便于后续快速完成去激活优化操 作。
在步骤 809中, 所述同一媒体网关通过 T2和 T3端点恢复原有的承载连 接, 这里的 T2和 T3端点为所述同一媒体网关在激活优化时保留的被旁路的 两个端点, 这样处理可以快速的去激活优化, 这里也可以通过其他端点重新 建立承载连接。
虽然上述实施例以 UMTS系统中的媒体网关为例进行说明, 但并不限于 此, 上述方法同样适用于其它通信系统中与所述媒体网关功能类似的网络设 备。
从上述实施例可知, 本发明通过将同一媒体网关的两个虚拟媒体网关中 移动交换中心服务器指定的物理上下文中指定的两个端点相连接, 实现了虚 拟媒体网关物理上下文之间的优化接网, 无需占用编解码转换器资源, 也无 需占用 IP/ATM等网络资源进行传输, 大大提高了语音质量; 进一步的, 虚拟 媒体网关激活优化时,保留原来与 IP/ATM网络连接的端点,从而使虚拟媒体 网关能够快速的去激活优化。 发明的精神和范围。 这样, 倘若对本发明的这些修改和变型属于本发明权利 要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种虚拟媒体网关优化接网的方法, 其特征在于, 该方法包括步骤: 控制虚拟媒体网关的网络实体分别指示同一媒体网关中的虚拟媒体网关 激活优化指定的物理上下文中指定的端点;
所述媒体网关在确定所述指定的物理上下文之间存在连接关系后, 将所 述指定的端点直接相连接。
2、 如权利要求 1所述的方法, 其特征在于, 所述媒体网关在将所述指定 的端点直接相连接时, 若所述指定的端点已分别与编解码转换器相连接, 则 分别切断所述指定的端点与编解码转换器的连接。
3、 如权利要求 1所述的方法, 其特征在于, 所述网络实体根据业务变化 分别指示所述媒体网关中的虚拟媒体网关去激活优化所述指定的物理上下文 中指定的端点, 所述媒体网关根据所述去激活优化指示切断所述指定的端点 之间的连接, 并通过其它端点建立承载连接。
4、 如权利要求 3所述的方法, 其特征在于, 所述媒体网关在将所述指定 的端点直接相连接时, 保留被旁路的其它端点, 并在执行去激活优化时通过 所述保留的其它端点恢复原有的承载连接。
5、 如权利要求 1至 4任一项所述的方法, 其特征在于, 所述网络实体通 过扩充的协议消息指示所述媒体网关激活优化或去激活优化指定的物理上下 文中指定的端点。
6、 如权利要求 5所述的方法, 其特征在于, 所述媒体网关在激活优化或 去激活优化指定的物理上下文中指定的端点后, 向所述网络实体上报所述激 活优化或去激活优化的事件。
7、 如权利要求 5所述的方法, 其特征在于, 所述媒体网关在激活优化或 去激活优化指定的物理上下文中指定的端点时平滑切换话路。
8、 一种网关设备, 用于根据控制实体的指示进行承载相关操作和媒体流 处理; 包括至少两个虚拟网关设备; 其特征在于, 包括: 接收单元, 用于接收控制实体的指示, 所述指示为激活优化虚拟网关设 备指定的物理上下文中指定的端点;
判断单元, 用于判断所述指定的物理上下文之间是否存在连接关系; 处理单元, 用于在确定所述指定的物理上下文之间存在连接关系时, 将 所述指定的端点直接相连接。
9、 如权利要求 8所述的网关设备, 其特征在于, 所述指示为去激活优化 所述指定的物理上下文中指定的端点时, 所述处理单元还用于切断所述指定 的端点之间的连接, 并通过其它端点建立承载连接。
10、 一种网络系统, 其特征在于, 包括: 媒体网关, 与媒体网关连接并 控制该媒体网关中的虚拟媒体网关的网络实体; 所述网络实体, 用于分别指 示同一媒体网关中的虚拟媒体网关激活优化指定的物理上下文中指定的端 点; 所述媒体网关, 用于接收到所述网络实体的激活优化指示, 并在确定所 述指定的物理上下文之间存在连接关系后, 将所述指定的端点直接相连接。
11、 如权利要求 10所述的系统, 其特征在于, 所述媒体网关在将所述指 定的端点直接相连接时, 若所述指定的端点已分别与编解码转换器相连接, 则分别切断所述指定的端点与编解码转换器的连接。
12、 如权利要求 10所述的系统, 其特征在于, 所述网络实体根据业务变 化分别指示所述媒体网关中的虚拟媒体网关去激活优化所述指定的物理上下 文中指定的端点, 所述媒体网关根据所述去激活优化指示切断所述指定的端 点之间的连接, 并通过其它端点建立承载连接。
13、 如权利要求 12所述的系统, 其特征在于, 所述媒体网关在将所述指 定的端点直接相连接时, 保留被旁路的其它端点, 并在执行去激活优化时通 过所述保留的其它端点恢复原有的承载连接。
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