WO2012000439A1 - 呼叫处理方法及媒体网关 - Google Patents

呼叫处理方法及媒体网关 Download PDF

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Publication number
WO2012000439A1
WO2012000439A1 PCT/CN2011/076598 CN2011076598W WO2012000439A1 WO 2012000439 A1 WO2012000439 A1 WO 2012000439A1 CN 2011076598 W CN2011076598 W CN 2011076598W WO 2012000439 A1 WO2012000439 A1 WO 2012000439A1
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WO
WIPO (PCT)
Prior art keywords
media gateway
user
call
media
gateway
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PCT/CN2011/076598
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English (en)
French (fr)
Inventor
余晓文
罗松
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to BR112012033389A priority Critical patent/BR112012033389A2/pt
Priority to EP11800184.1A priority patent/EP2590377A4/en
Publication of WO2012000439A1 publication Critical patent/WO2012000439A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/1026—Media gateways at the edge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to the field of communications, and in particular to a call processing method and a media gateway.
  • a media gateway is used in a soft switch ( Soft Switch, referred to as SS).
  • Soft Switch Soft Switch, referred to as SS).
  • CSCF Call Session Control Function
  • Each media gateway accesses the core network through a protocol interface such as H.248 or Session Initiation Protocol (SIP), and the call between the media gateways is rotated through the core network.
  • the core network device may be disconnected due to various reasons such as the protocol interface, causing the media gateway and the core network device to lose communication. For example, for those important large enterprise network users, a large number of internal users of the enterprise network may belong to many different media gateways. If the protocol service interface between a media gateway and a core network device is interrupted, then the media The gateway is basically isolated from the enterprise network, so that the user of the media gateway cannot talk to other users of the enterprise network.
  • the media gateway device may perform internal exchange of the media gateway in the case of loss of communication with the core network control device, but the scope is limited, and is limited to the inside of the media gateway device; and for the interruption of the call from the media gateway to other media gateways,
  • existing media gateway devices are equipped with an escape interface, additional hardware interfaces are required for this, and additional external network interfaces need to be configured, which increases equipment costs and increases the complexity of networking and network management.
  • a primary object of the present invention is to provide a call processing method and a media gateway to solve the problem of communication interruption or high equipment cost due to the increase of the escape interface.
  • a call processing method is provided.
  • the call processing method includes: the media gateway determines that the protocol interface is interrupted; when the user of the media gateway picks up the phone and dials, the media gateway queries other media gateways connected thereto, and sends an initial message to the other media gateway, where the initial message carries The call identification information of the user and the called subscriber number information of the user call; the other media gateways connected to the media gateway receive the initial message, and perform call processing according to the identification information and the called subscriber number information.
  • the method further includes: the media gateway configuring its internal user number; and the media gateway configuring a matching table of the user numbers of other media gateways connected thereto.
  • the other gateway media performs call processing according to the identification information and the called user number information, including: the other media gateway determines whether the called user number information and the matching table match; if the determination result is a match, determining that the user corresponding to the called user number information is other The user of the media gateway further determines whether the user corresponding to the called user number information is idle; if the judgment result is yes, the information of the successful call is sent to the media gateway, and if the determination result is no, the information of the call failure is sent to the media gateway. .
  • the method further includes: the media gateway receiving the information of the call success, establishing a communication connection between the user on the media gateway and the user on the other media gateway.
  • the method further includes: after receiving the information that the call fails, the media gateway ends the call of the user on the media gateway.
  • the media gateway includes: a determining module, configured to determine a protocol interface interruption thereof; a query module, configured to query other media gateways connected thereto; and a sending module, configured to send an initial message to other media gateways, where The initial message carries the call identification information of the user and the called subscriber number information of the user call; the receiving module is configured to receive an initial message sent by another connected media gateway; and the processing module is configured to perform, according to the identifier information and the called subscriber number information, Call processing.
  • the media gateway further includes: a first configuration module configured to configure a user number therein; and a second configuration module configured to configure a matching table of user numbers of other media gateways connected thereto.
  • the processing module includes: a first determining sub-module, configured to determine whether the called user number information and the matching table match; determining the sub-module, configured to determine, when the determining result of the first determining sub-module is a match, determining that the called user number information corresponds to The user is the user of the other media gateway; the second judgment sub-module, setting To determine whether the user corresponding to the called subscriber number information is idle; the first sending submodule is configured to: when the judgment result of the second determining submodule is yes, send the information of the successful call to the media gateway; the second sending submodule, It is set to send the information of the call failure to the media gateway when the judgment result of the second judgment sub-module is NO.
  • the device further includes: a connection module configured to establish a communication connection between the user on the media gateway and the user on the other media gateway when receiving the information of the call success.
  • the above apparatus further includes: an ending module, configured to end the call of the user on the media gateway when receiving the information that the call failed.
  • the media gateway determines that the protocol interface is interrupted by the media gateway. When the user of the media gateway picks up the phone, the media gateway sends an initial message to the other media gateway, where the initial message carries the call identification information of the user and the call of the user.
  • the called user number information the other media gateways connected to the media gateway receive the initial message, perform call processing according to the identification information and the called user number information, and solve the related art in the related art, after the interruption of the protocol interface, the communication is interrupted or the escape interface is added.
  • the problem of high equipment cost is increased, the reliability of user calls between media gateways is improved, and the equipment cost of the media gateway is reduced.
  • FIG. 2 is a flowchart of a call processing method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of call processing judgment according to an embodiment of the present invention
  • 4 is a flow chart of a number matching process according to an embodiment of the present invention
  • FIG. 5 is a flow chart of a called user location query according to an embodiment of the present invention
  • FIG. 6 is another gateway according to an embodiment of the present invention.
  • a flowchart of processing of a called location query message sent by a calling gateway FIG. 7 is a flowchart of cross-gateway call processing according to an embodiment of the present invention
  • 8 is a structural block diagram of a media gateway according to an embodiment of the present invention
  • FIG. 9 is a block diagram showing a preferred structure of a media gateway according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a call processing method according to an embodiment of the present invention. As shown in FIG. 2, the method includes: Step S202: The media gateway determines that its protocol interface is interrupted. Step 4 gathers S203, and the media gateway queries other media gateways connected thereto.
  • the query method in this step can be queried by the network management system of the system, or the information of other media gateways can be pre-configured when the data is configured by the media gateway.
  • Step S204 When the user of the media gateway picks up the phone, the media gateway sends an initial message, where the initial message carries the call identification information of the user and the called user number information of the user call.
  • Step S206 The other media gateways connected to the media gateway receive the initial message, and perform call processing according to the identification information and the called user number information.
  • the call processing is performed by receiving the initial message, which avoids the related equipment in the related art, after the protocol interface is interrupted, the communication terminal or the escape interface is increased, resulting in relatively high equipment cost.
  • the problem is that the reliability of the user call between the media gateways is improved, and the equipment cost of the media gateway is reduced.
  • the method further includes: the media gateway configuring a user number inside thereof; and the media gateway configuring a matching table of the user numbers of other media gateways connected thereto.
  • the matching table of the internal user number of the media gateway and the user number of other media gateways connected thereto is configured to provide a guarantee for the user's call between the media gateways.
  • a preferred embodiment of the call processing performed by the other gateway media based on the identification information and the called subscriber number information in step S206 will be described below.
  • the other media gateway determines whether the called user number information and the matching table match. If the determination result is a match, the user corresponding to the called user number information is determined to be the user of the other media gateway, and the called party is further determined.
  • the first determining step of the preferred embodiment may determine, according to the matching table, whether the call is a call to a user in the media gateway, and use a second determining step to send a message indicating whether the call is successful or failed according to whether the user is idle.
  • the media gateway is configured to determine whether to establish a connection for the call, and implement communication between the media gateways.
  • the method further includes: the media gateway receiving the information of the successful call, the user on the media gateway and the user on the other media gateway. Establish a communication connection. Through the setup steps of the preferred embodiment, communication between users of the media gateway is achieved.
  • the method further includes: after receiving the information that the call fails, the media gateway ends the call of the user on the media gateway. Through the end step of the preferred embodiment, the called party terminates the call when the called user is in a non-idle state, improving the reliability of user communication between the media gateways.
  • Step S302 Configure a normal gateway protocol interface and user data.
  • Step S304 configuring a user number of the gateway.
  • Step S308, the media gateway determines whether the protocol interface is interrupted? If the result of the determination is no, step M1 to S310 is performed, and if the result of the determination is YES, step S312 is performed.
  • Step 4 gathers S310, and performs normal interaction with the core network device, and ends the process.
  • Step 4 gathers S312, starts internal call processing (the call processing flow in the third embodiment and the fourth embodiment), and ends the process.
  • the method for performing call processing by other media gateways in the preferred embodiment of the present invention is used.
  • the third embodiment implements the location query of the called user in the embodiment.
  • the calling gateway receives the off-hook message, allocates the voice channel time slot, and receives the number
  • the caller connects to the dial tone, connects to the receiver, sets the timer, and waits for the number to be received.
  • the dial tone is cut off, and the number matching is performed according to the number matching table.
  • FIG. 4 is a flowchart of a number matching process according to an embodiment of the present invention. As shown in FIG. 4, the method includes: Step 4: S402, receiving a caller's off-hook message.
  • Step S404 assigning a voice channel time slot to the calling party, assigning a number picker, connecting the calling user to the dial tone, connecting the receiver, setting a timer, waiting for the user to dial.
  • Step 4 gathers S406 and receives the user dialing.
  • Step S408, is the first digit number? If the result of the determination is yes, step S410 is performed, and if the result of the determination is no, step S412 is performed.
  • Step S410 stopping the dial tone, and ending the process.
  • Step 4 gathers S412 to perform number matching. In step S414, the matching result is determined. If the number matching fails, step S416 is performed. If the number matching is successful, step S418 is performed.
  • step S406 is performed.
  • step S416 the user is sent a busy tone, and the user hangs up to end the call, and the process ends.
  • step S4108 it is determined whether the called number is the gateway user. If the determination result is yes, step S420 is performed, and if the determination result is no, step S422 is performed.
  • step S420 the gateway internal self-switching processing flow is entered, and the process ends.
  • Step S422 querying the called gateway location according to the called number, and ending the process.
  • FIG. 5 is a flow chart of a called user location query according to an embodiment of the present invention. As shown in FIG.
  • the method includes: Step 4: S502, the gateway where the calling party is located sends an initial message of the called party to all other gateways connected thereto, and the message content carries the called user number and the calling call identification information.
  • Step S504 setting a timer and waiting for responses from other gateways.
  • the following steps S506 to S510 are corresponding processes performed according to the response result.
  • Step S506 if the called gateway receives the message "The call is successfully called, the message of the called user is obtained from the message content, and the process ends.
  • Step S508 receiving the called gateway response "Call called failed"
  • the calling user is sent a busy tone until the call is terminated, and the process ends.
  • Step 4: S512 no response is received, the timer expires.
  • Step S5144 the calling user is sent a busy tone until the call is terminated.
  • Figure 6 is a flowchart of the process of the called location query message sent by the gateway to the calling gateway according to the embodiment of the present invention. As shown in Figure 6, the method includes: Step S602, other gateways receive The called party sends an initial message to the calling gateway. Step S604: Extract the bishop gateway information and the called number information in the content of the called query message sent by the calling gateway, and check whether the called number is a user in the gateway. Step S606, determining whether it is the gateway user? If the result of the determination is no, the process goes to step S608, and if the result of the determination is YES, step S610 is performed. Step S608, the message is not further processed, and the process ends.
  • Step S610 Acquire a user circuit identifier (location information) corresponding to the called number and a current user status.
  • Step S612 determining whether the user is idle? If the result of the determination is no, step 4 is performed S614, and if the result of the determination is YES, step S616 is performed.
  • Step S614 responding to the calling gateway with a "Call Called Failed" message, ending the process.
  • Step S616 the calling gateway responds with a "call called successful" message, and the message content carries the location information of the called user, and the process ends.
  • the calling gateway performs a call connection across the gateway.
  • Step S702 After the calling gateway finds the called gateway, first acquires a media circuit resource, and then sends a ringing message to The called gateway, the message content carries information such as the calling subscriber circuit identifier, the called number information, the IP address of the calling media stream, and the port number.
  • Step S704 the called gateway receives the ringing message, finds the circuit number corresponding to the called party according to the called number, acquires a media circuit resource for the called user, and then sends a response message to the calling gateway, and the message content is called Circuit ID, IP address and port number of the called media stream.
  • Step S706 After receiving the called ringing success response message, the calling gateway returns a ringing tone to the calling party, and records information such as the called user identifier and the IP address and port number of the peer media stream in the message.
  • Step S708 when the called user picks up the phone, the called gateway detects the off-hook, sets the media circuit resource attribute to send and receive, and sets the address and port number of the opposite RTP stream as the IP address and port number of the calling media stream.
  • the RTP media stream is converted into a TDM voice stream and then connected to the called subscriber circuit; and the called off-hook message is sent to the calling gateway.
  • Step S710 After receiving the off-hook message, the calling gateway sets the media circuit resource corresponding to the calling user to be sent and received, and sets the address and port number of the peer RTP stream to be the IP address and port number of the called media stream.
  • the RTP media stream is converted into a TDM voice stream and then connected to the calling subscriber circuit, and both the calling party and the called party enter a call state.
  • Step S712 if one of the two parties hangs up, the call and the corresponding media circuit resource are first released, and a release message is sent to notify the other party's gateway.
  • Step S714 After receiving the release message, the peer gateway sends a busy tone to the local user, and releases the media resource. The call is released until the user hangs up.
  • Step S716 when the call ends, the call CDR is generated by the calling gateway, and the content includes a calling number, a called number, a call time, and an ending time.
  • the CDR can be temporarily stored in the media gateway, or can be transmitted to the network management or accounting server.
  • the calling gateway After the calling gateway obtains the gateway information of the called user, the calling gateway performs a call connection across the gateway.
  • Embodiment 5 This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • a media gateway is provided.
  • FIG. 8 is a structural block diagram of a media gateway according to an embodiment of the present invention, as shown in FIG.
  • the media gateway includes: a determining module 82, a querying module 83, a sending module 84, a receiving module 86, and a processing module 88.
  • the determining module 82 is configured to determine its protocol interface interrupt;
  • the query module 83 is coupled to the determining module 82, and configured to: when the determining module 82 determines the protocol interface terminal, when the user of the media gateway picks up the phone, the query is located The other media network management system connected to the media gateway;
  • the sending module 84 is connected to the query module 83, and is configured to send an initial message to the other media gateways queried by the query module 83, where the initial message carries the call identification information of the user and the called by the user.
  • FIG. 9 is a block diagram of a preferred structure of a media gateway according to an embodiment of the present invention. As shown in FIG. 9, the media gateway further includes: a first configuration module 92, a second configuration module 94, a connection module 96, and an end module 98.
  • the module 88 includes: a first determining submodule 882, a determining submodule 884, and a second determining
  • the module 886, the first sending submodule 888 and the second sending submodule 889 are described in detail below.
  • the first configuration module 92 is configured to configure the internal user number thereof; the second configuration module 94 is configured to be configured.
  • the processing module 88 includes: a first determining submodule 882, connected to the first configuration module 92 and the second configuration module 94, configured to determine whether the called user number information and the matching table configured by the second configuration module 94 match; 884, connected to the first determining sub-module 882, configured to determine that the user corresponding to the called user number information is a user of another media gateway when the judgment result of the first determining sub-module 882 is matched;
  • the sub-module 886 is connected to the determining sub-module 884, and is configured to determine, when the determining sub-module 884 determines that the user corresponding to the called user number information is a user of another media gateway, whether the user corresponding to the called user number information is idle;
  • the sub-module 888 is connected to the second judging sub-module 886, and is configured to send the information about the successful call to the media gateway when the judgment result of the second judging sub-module 886 is YES; the second sending sub-module 8
  • the connection module 96 is connected to the first sending submodule 888, and is configured to establish a communication connection between the user on the media gateway and the user on the other media gateway when receiving the information about the successful call sent by the first sending submodule 888.
  • the ending module 98 is connected to the second sending submodule 889, and is configured to end the call of the user on the media gateway when receiving the information of the call failure sent by the second sending submodule 889.
  • the call processing is performed by receiving the initial message, which avoids the related art, after the protocol interface is interrupted, the communication terminal or the escape interface is added, causing the device
  • the problem of relatively high cost improves the reliability of user calls between media gateways and reduces the equipment cost of the media gateway.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.

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Abstract

本发明公开了一种呼叫处理方法及媒体网关，该方法包括：媒体网关确定其协议接口中断；当媒体网关的用户摘机拨号时，媒体网关发送初始消息，其中，初始消息携带有用户的呼叫标识信息和用户呼叫的被叫用户号码信息；与媒体网关相连的其它媒体网关接收初始消息，根据标识信息和被叫用户号码信息进行呼叫处理。通过本发明，提高了媒体网关间用户呼叫的可靠性，同时降低了媒体网关的设备成本。

Description

呼叫处理方法及媒体网关 技术领域 本发明涉及通信领域， 具体而言， 涉及一种呼叫处理方法及媒体网关。 背景技术 在下一代网络 ( Next Generation Network, 简称为 NGN ), 或是在 IP多媒 体子系统 ( Internet Protocol Multimedia Subsystem, 简称为 IMS ) 网络中， 媒体 网关用于在软交换 ( Soft Switch, 简称为 SS ) 或者呼叫会话控制功能 （Call Session Control Function, 简称为 CSCF ) 的控制下完成呼叫过程。 随着 NGN 网络的不断发展和演进， 运营商依据自身运营的各种考虑， 用 户接入设备趋向小型化发展， NGN或者 IMS核心网设备下会部署若千小型媒 体网关。 每个媒体网关均通过 H.248 或者会话初始协议 ( Session Initiation Protocol, 简称为 SIP )等协议接口接入到核心网， 且媒体网关间的通话时通过 核心网进行周转的。 但是， 核心网设备可能由于各种原因如协议接口发生中断， 而导致媒体网 关和核心网设备失去通信。 例如： 对于那些重要的大企业网用户， 数目众多的企业网内部用户， 可能 分属于许多个不同的媒体网关， 如果某个媒体网关和核心网设备之间的协议业 务接口中断， 那么， 该媒体网关基本上被孤立出企业网， 这样， 该媒体网关的 用户无法和企业网的其他用户通话。 目前， 媒体网关设备在和核心网控制设备失去通讯的情况下， 可以进行媒 体网关内部交换， 但范围有限， 只限于本媒体网关设备内部； 而对于从本媒体 网关到其它媒体网关的呼叫中断， 尽管现有的媒体网关设备会配备逃生接口， 但为此需要额外的硬件接口， 也需要配置额外的对外网络接口， 增加了设备成 本， 也增加了组网和网络管理的复杂性。 发明内容 本发明的主要目的在于提供一种呼叫处理方法及媒体网关， 以解决通信中 断或者由于增加逃生接口， 造成设备成本比较高的问题。 为了实现上述目的， 才艮据本发明的一个方面， 提供了一种呼叫处理方法。 该呼叫处理方法包括： 媒体网关确定其协议接口中断； 当媒体网关的用 户摘机并拨号时， 媒体网关查询与其相连接的其他媒体网关， 向其他媒体网 关发送初始消息， 其中， 初始消息携带有用户的呼叫标识信息和用户呼叫的 被叫用户号码信息； 与媒体网关相连的其它媒体网关接收初始消息， 根据标 识信息和被叫用户号码信息进行呼叫处理。 在媒体网关确定其协议接口中断之前， 还包括： 媒体网关配置其内部的用 户号码； 媒体网关配置与其相连的其它媒体网关的用户号码的匹配表。 其它网关媒体根据标识信息和被叫用户号码信息进行呼叫处理包括： 其它 媒体网关判断被叫用户号码信息和匹配表是否匹配； 如果判断结果为匹配， 则 确定被叫用户号码信息对应的用户为其它媒体网关的用户， 并进一步判断被叫 用户号码信息对应的用户是否空闲； 如果判断结果为是， 将呼叫成功的信息发 送给媒体网关， 如果判断结果为否， 将呼叫失败的信息发送给媒体网关。 在其它网关媒体根据标识信息和被叫用户号码信息进行呼叫处理之后， 还 包括： 媒体网关接收到呼叫成功的信息， 为媒体网关上的用户和其它媒体网关 上的用户建立通信连接。 在其它网关媒体根据标识信息和被叫用户号码信息进行呼叫处理之后， 还 包括： 媒体网关接收到呼叫失败的信息， 则结束媒体网关上用户的呼叫。 为了实现上述目的， 根据本发明的另一方面， 提供了一种媒体网关。 才艮据本发明的媒体网关包括： 确定模块， 设置为确定其协议接口中断； 查 询模块， 用于查询与其相连接的其他媒体网关； 发送模块， 设置为向其他媒体 网关发送初始消息， 其中， 初始消息携带有用户的呼叫标识信息和用户呼叫的 被叫用户号码信息； 接收模块， 设置为接收相连的其它媒体网关发送的初始消 息； 处理模块， 设置为根据标识信息和被叫用户号码信息进行呼叫处理。 上述媒体网关还包括： 第一配置模块， 设置为配置其内部的用户号码； 第 二配置模块， 设置为配置与其相连的其它媒体网关的用户号码的匹配表。 处理模块包括： 第一判断子模块， 设置为判断被叫用户号码信息和匹配表 是否匹配； 确定子模块， 设置为在第一判断子模块的判断结果为匹配时， 确定 被叫用户号码信息对应的用户为其它媒体网关的用户； 第二判断子模块， 设置 为判断被叫用户号码信息对应的用户是否空闲； 第一发送子模块， 设置为在第 二判断子模块的判断结果为是时， 将呼叫成功的信息发送给媒体网关； 第二发 送子模块， 设置为在第二判断子模块的判断结果为否时， 将呼叫失败的信息发 送给媒体网关。 上述装置还包括： 连接模块， 设置为当接收到呼叫成功的信息时， 为媒体 网关上的用户和其它媒体网关上的用户建立通信连接。 上述装置还包括： 结束模块， 设置为当接收到呼叫失败的信息， 结束媒体 网关上用户的呼叫。 通过本发明， 釆用媒体网关确定其协议接口中断； 当媒体网关的用户摘机 拨号时， 媒体网关向其他的媒体网关发送初始消息， 其中， 初始消息携带有用 户的呼叫标识信息和用户呼叫的被叫用户号码信息； 与媒体网关相连的其它媒 体网关接收初始消息， 根据标识信息和被叫用户号码信息进行呼叫处理， 解决 了相关技术中在协议接口中断后， 通信中断或者由于增加逃生接口， 造成设备 成本比较高的问题， 提高了媒体网关间用户呼叫的可靠性， 同时降低了媒体网 关的设备成本。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的不 当限定。 在附图中： 图 1是 居本发明实施例的网络结构图； 图 2是 居本发明实施例的呼叫处理方法的流程图； 图 3是 居本发明实施例的呼叫处理判断的流程图； 图 4是才艮据本发明实施例的号码匹配过程的流程图； 图 5才艮据本发明实施例的被叫用户位置查询的流程图； 图 6是才艮据本发明实施例的其它网关对主叫网关发来的被叫位置查询消息 的处理的流程图； 图 7是根据本发明实施例的跨网关呼叫处理的流程图； 图 8是根据本发明实施例的媒体网关的结构框图； 以及 图 9是根据本发明实施例的媒体网关的优选的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是， 在不 冲突的情况下， 本申请中的实施例及实施例中的特征可以相互组合。 图 1是 居本发明实施例的网络结构图， 如图 1所示， 多个媒体网关处于 同一局域网内， 上行通过路由器或者以太网交换机连接到核心网设备。 正常情 况下各媒体网关直接和核心网设备进行协议交互， 在本发明实施例中， 如果某 个媒体网关和核心网的上层协议接口中断， 则集群内的媒体网关釆用下述实施 例中的呼叫处理方法进行内部呼叫处理。 实施例一 在本实施例中， 提供了一种呼叫处理方法。 图 2是根据本发明实施例的呼 叫处理方法的流程图， 如图 2所示， 包括： 步骤 S202 , 媒体网关确定其协议接口中断。 步 4聚 S203 , 媒体网关查询与其相连的其他媒体网关。 该步 4聚中的查询方法可以通过向系统的网管查询，也可以在媒体网关配 置数据时， 预先配置其他媒体网关的信息。 步骤 S204, 当媒体网关的用户摘机时， 媒体网关发送初始消息， 其中， 初 始消息携带有用户的呼叫标识信息和用户呼叫的被叫用户号码信息。 步骤 S206, 与媒体网关相连的其它媒体网关接收初始消息， 根据标识信息 和被叫用户号码信息进行呼叫处理。 通过上述步骤， 在媒体网关确定其协议接口中断的情况下， 通过接收初始 消息来进行呼叫处理， 避免了相关技术中在协议接口中断后， 通信终端或者由 于增加逃生接口， 造成设备成本比较高的问题， 提高了媒体网关间用户呼叫的 可靠性， 同时降低了媒体网关的设备成本。 优选地， 在步骤 S202之前， 还包括： 媒体网关配置其内部的用户号码； 媒体网关配置与其相连的其它媒体网关的用户号码的匹配表。 通过该优选实施 例的配置步骤， 对媒体网关内部用户号码和与其相连的其它媒体网关的用户号 码的匹配表进行配置， 为媒体网关间的用户通话提供了保证。 下面对步骤 S206 其它网关媒体根据标识信息和被叫用户号码信息进行呼 叫处理的一个优选的实施方式进行说明。 在该优选实施方式中， 其它媒体网关 判断被叫用户号码信息和匹配表是否匹配； 如果判断结果为匹配， 则确定被叫 用户号码信息对应的用户为其它媒体网关的用户， 并进一步判断被叫用户号码 信息对应的用户是否空闲； 如果判断结果为是， 将呼叫成功的信息发送给媒体 网关， 如果判断结果为否， 将呼叫失败的信息发送给媒体网关。 通过该优选实 施例的第一个判断步骤， 可以根据匹配表判断得到该呼叫是否是对本媒体网关 内用户的呼叫， 通过第二个判断步骤， 根据用户是否空闲， 发送呼叫成功或失 败的消息给媒体网关， 用于判断是否给该呼叫建立连接， 实现了媒体网关间通 信。 优选地， 在其它网关媒体才艮据标识信息和被叫用户号码信息进行呼叫处理 之后， 上述方法还包括： 媒体网关接收到呼叫成功的信息， 为媒体网关上的用 户和其它媒体网关上的用户建立通信连接。 通过该优选实施例的建立步骤， 实 现了媒体网关间用户的通信。 优选地， 在其它网关媒体才艮据标识信息和被叫用户号码信息进行呼叫处理 之后， 还包括： 媒体网关接收到呼叫失败的信息， 则结束媒体网关上用户的呼 叫。 通过该优选实施例的结束步骤， 在被叫用户出于非空闲状态， 主叫方终止 呼叫， 提高了媒体网关间用户通信的可靠性。 实施例二 图 3是 居本发明实施例的呼叫处理判断的流程图， 包括： 步骤 S302, 配置正常的网关协议接口及用户数据。 步骤 S304, 配置本网关的用户号码。 步骤 S306, 配置网关集群内的用户号码匹配表。 步骤 S308,媒体网关判断协议接口是否中断？ 如果判断结果为否， 执行步 Ml S310, 如果判断结果为是， 执行步骤 S312。 步 4聚 S310, 和核心网设备进行正常交互， 结束本流程。 步 4聚 S312, 启动内部呼叫处理 （实施例三和实施例四中呼叫处理流程）， 结束本流程。 通过该优选实施例，对媒体网关的协议接口是否中断进行判断，如果中断， 则釆用本发明优选实施例中的通过其它媒体网关进行呼叫处理的方法。 实施例三 在本实施例中实现了被叫用户的位置查询，需要说明的是，在本实施例中， 主叫网关收到主叫摘机消息， 分配话路时隙、 收号器， 给主叫接续拨号音， 接 续收号器， 设置定时器， 等待收号。 当收到用户拨的第一位号码， 切断拨号音， 同时才艮据号码匹配表进行号码匹配。 匹配结果有三种情况： 第一种情况， 号码匹配失败， 则本次呼叫失败， 主叫听忙音,用户挂机后结 束呼叫。 第二种情况， 需要继续收号， 继续等待用户拨号。 第三种情况， 号码匹配成功， 则判断被叫号码是否是本网关内的用户， 如 果是， 则进入网关内部的呼叫处理流程， 在此不再详细说明。 图 4是才艮据本发明实施例的号码匹配过程的流程图， 如图 4所示， 包括： 步 4聚 S402 , 收到主叫用户摘机消息。 步骤 S404, 为主叫分配话路时隙， 分配收号器， 为主叫用户接续拨号音， 接续收号器， 设置定时器， 等待用户拨号。 步 4聚 S406, 收到用户拨号。 步骤 S408, 是第一位号码吗？如果判断结果为是， 执行步骤 S410, 如果判 断结果为否， 执行步骤 S412。 步骤 S410, 停止拨号音， 结束本流程。 步 4聚 S412, 进行号码匹配。 步骤 S414, 判断匹配结果， 如果号码匹配失败， 执行步骤 S416, 如果号 码匹配成功， 执行步骤 S418, 如果匹配结果为第二种情况， 需要继续收号， 执 行步骤 S406。 步骤 S416, 给用户送忙音， 用户挂机结束呼叫， 结束本流程。 步骤 S418, 判断被叫号码是否为本网关用户， 如果判断结果为是， 执行步 骤 S420, 如果判断结果为否， 执行步骤 S422。 步骤 S420, 进入网关内部自交换处理流程， 结束本流程。 步骤 S422, 根据被叫号码查询被叫网关位置， 结束本流程。 图 5根据本发明实施例的被叫用户位置查询的流程图。如图 5所示， 包括： 步 4聚 S502,主叫呼叫用户所在网关向与其相连的其它所有网关发送被叫查 询的初始消息， 消息内容带上被叫用户号码以及主叫呼叫标识信息。 步骤 S504, 设置定时器， 并等待其它网关的响应。 下述步骤 S506至步骤 S510为根据响应结果进行的相应处理。 步骤 S506 , 如果收到被叫网关回应 "呼叫被叫成功，，的消息， 从消息内容中 获取被叫用户位置信息， 结束本流程。 步骤 S508 , 收到被叫网关回应 "呼叫被叫失败"的消息。 步骤 S510, 给主叫用户送忙音， 直到挂机结束呼叫， 结束本流程。 步 4聚 S512, 未收到响应， 定时器超时。 步骤 S514, 给主叫用户送忙音， 直到挂机结束呼叫， 结束本流程。 图 6是才艮据本发明实施例的其它网关对主叫网关发来的被叫位置查询消息 的处理的流程图。 如图 6所示， 包括： 步骤 S602, 其它网关收到主叫网关发来的被叫查询初始消息； 步骤 S604,提取主叫网关发来的被叫查询消息内容中的主教网关信息和被 叫号码信息， 检查被叫号码是否是本网关内用户。 步骤 S606, 判断是否是本网关用户？ 如果判断结果为否， 则执行到步骤 S608, 如果判断结果为是， 执行步骤 S610。 步骤 S608, 对此消息不作进一步处理， 结束本流程。 步骤 S610, 获取被叫号码对应的用户电路标识（位置信息）及当前的用户 状态。 步骤 S612, 判断该用户是否空闲？ 如果判断结果为否， 执行步 4聚 S614, 如果判断结果为是， 执行步骤 S616。 步骤 S614, 向主叫网关回应 "呼叫被叫失败"消息， 结束本流程。 步骤 S616, 主叫网关回应 "呼叫被叫成功"消息， 消息内容带上被叫用户的 位置信息， 结束本流程。 实施例四 在本实施例中实现了主叫网关获取到被叫用户所在网关信息后， 跨网关进 行呼叫连接。 图 7是根据本发明实施例的跨网关呼叫处理的流程图，如图 7所示， 包括： 步骤 S702, 主叫网关找到被叫网关后， 首先获取一个媒体电路资源， 之后 发送振铃消息给被叫网关， 消息内容带上主叫用户电路标识、 被叫号码信息、 主叫媒体流的 IP地址及端口号等信息。 步骤 S704, 被叫网关收到振铃消息， 根据被叫号码， 找到被叫对应的电路 号， 为被叫用户获取一个媒体电路资源， 之后发送响应消息给主叫网关， 消息 内容带上被叫电路标识、被叫媒体流的 IP地址及端口号。同时给被叫用户振铃。 步骤 S706, 主叫网关收到被叫振铃成功响应消息后， 给主叫放回铃音， 并 将消息中的被叫用户标识、 对端媒体流的 IP地址及端口号等信息记录下来。 步骤 S708, 当被叫用户摘机， 被叫网关检测到摘机后， 将媒体电路资源属 性设为收发， 设置对端 RTP流的地址和端口号为主叫媒体流的 IP地址和端口 号， 并将 RTP媒体流转换为 TDM语音流后接续到被叫用户电路； 同时发送被 叫摘机消息给主叫网关。 步骤 S710, 主叫网关收到被叫摘机消息后，设置主叫用户对应的媒体电路 资源为收发， 并设置对端 RTP流的地址和端口号为被叫媒体流的 IP地址和端 口号， 并将 RTP媒体流转换为 TDM语音流后接续到该主叫用户电路， 主被叫 双方进入通话 态。 步骤 S712,通话双方有一方挂机，则首先释放呼叫及对应的媒体电路资源， 同时发送释放消息通知对方网关。 步骤 S714, 对方网关收到释放消息后， 给本端用户放忙音， 并释放媒体资 源。 直到该用户挂机后， 释放呼叫。 步骤 S716, 通话结束时， 通话话单由主叫网关产生， 内容包括主叫号码、 被叫号码、 通话时间、 结束时间。 话单可以暂存媒体网关， 也可以传给网管或 者计费服务器。 通过本优选实施例， 实现了主叫网关获取到被叫用户所在网关信息后， 跨 网关进行呼叫连接。 实施例五 本实施例综合了实施例一及其中的优选实施方式， 在本实施例中提供了一 种媒体网关， 图 8是根据本发明实施例的媒体网关的结构框图， 如图 8所示， 该媒体网关包括： 确定模块 82、 查询模块 83、 发送模块 84、 接收模块 86和处 理模块 88 , 下面对上述结构进行详细描述。 确定模块 82 , 设置为确定其协议接口中断； 查询模块 83 , 连接至确定模 块 82 , 设置为在确定模块 82确定协议接口终端的情况下， 当媒体网关的用户 摘机拨号时， 查询与其所在的媒体网关相连的其他媒体网管； 发送模块 84 , 连 接至查询模块 83 ,设置为向查询模块 83查询到的其他媒体网关发送初始消息， 其中， 初始消息携带有用户的呼叫标识信息和用户呼叫的被叫用户号码信息； 接收模块 86 , 连接至发送模块 84 , 设置为接收发送模块 84发送的相连的其它 媒体网关发送的初始消息； 处理模块 88 , 连接至接收模块 86 , 设置为 居接 收模块 86接收的标识信息和被叫用户号码信息进行呼叫处理。 图 9是根据本发明实施例的媒体网关的优选的结构框图， 如图 9所示， 该 媒体网关还包括： 第一配置模块 92、 第二配置模块 94、 连接模块 96和结束模 块 98 , 处理模块 88包括： 第一判断子模块 882、 确定子模块 884、 第二判断子 模块 886、 第一发送子模块 888和第二发送子模块 889 , 下面对上述结构进行 详细描述： 第一配置模块 92 , 设置为配置其内部的用户号码； 第二配置模块 94 ,设置为配置与其相连的其它媒体网关的用户号码的匹配 表。 处理模块 88包括： 第一判断子模块 882 , 连接至第一配置模块 92和第二 配置模块 94 , 设置为判断被叫用户号码信息和第二配置模块 94配置的匹配表 是否匹配； 确定子模块 884 , 连接至第一判断子模块 882 , 设置为才艮据第一判 断子模块 882的判断结果为匹配时， 设置为确定被叫用户号码信息对应的用户 为其它媒体网关的用户； 第二判断子模块 886 , 连接至确定子模块 884 , 设置 为在确定子模块 884确定被叫用户号码信息对应的用户为其它媒体网关的用户 时， 判断被叫用户号码信息对应的用户是否空闲； 第一发送子模块 888 , 连接 至第二判断子模块 886 , 设置为在第二判断子模块 886的判断结果为是时， 将 呼叫成功的信息发送给媒体网关； 第二发送子模块 889 , 连接至第二判断子模 块 886 , 设置为在第二判断子模块 886的判断结果为否时， 将呼叫失败的信息 发送给媒体网关。 连接模块 96 , 连接至第一发送子模块 888 , 设置为当接收到第一发送子模 块 888发送的呼叫成功的信息时， 为媒体网关上的用户和其它媒体网关上的用 户建立通信连接。 结束模块 98 , 连接至第二发送子模块 889 , 设置为当接收到第二发送子模 块 889发送的呼叫失败的信息时， 结束媒体网关上用户的呼叫。 通过本发明的上述实施例， 在媒体网关确定其协议接口中断的情况下， 通 过接收初始消息来进行呼叫处理， 避免了相关技术中在协议接口中断后， 通信 终端或者由于增加逃生接口， 造成设备成本比较高的问题， 提高了媒体网关间 用户呼叫的可靠性， 同时降低了媒体网关的设备成本。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可以 用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多 个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程序代码 来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 并且在某些 情况下， 可以以不同于此处的顺序执行所示出或描述的步骤， 或者将它们分别 制作成各个集成电路模块， 或者将它们中的多个模块或步骤制作成单个集成电 路模块来实现。 这样， 本发明不限制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领 域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的 ^"神和原则 之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之 内。

Claims

权 利 要 求 书 一种呼叫处理方法， 包括：
媒体网关确定其协议接口中断；
当所述媒体网关的用户摘机拨号时， 所述媒体网关查询与其相连接 的其他媒体网关；
所述媒体网关发送初始消息， 其中， 所述初始消息携带有所述用户 的呼叫标识信息和所述用户呼叫的被叫用户号码信息；
与所述媒体网关相连的其它媒体网关接收所述初始消息， 根据所述 标识信息和所述被叫用户号码信息进行呼叫处理。 根据权利要求 1所述的方法， 其中， 在媒体网关确定其协议接口中断之 前， 还包括：
所述媒体网关配置其内部的用户号码；
所述媒体网关配置与其相连的所述其它媒体网关的用户号码的匹配 表。 根据权利要求 2所述的方法， 其中， 所述其它网关媒体根据所述标识信 息和所述被叫用户号码信息进行呼叫处理包括： 所述其它媒体网关判断所述被叫用户号码信息和所述匹配表是否匹 配；
如果判断结果为匹配， 则确定所述被叫用户号码信息对应的用户为 所述其它媒体网关的用户， 并进一步判断所述被叫用户号码信息对应的 用户是否空闲；
如果判断结果为是， 将呼叫成功的信息发送给所述媒体网关， 如果 判断结果为否， 将呼叫失败的信息发送给所述媒体网关。 才艮据权利要求 3所述的方法， 其中， 在所述其它网关媒体才艮据所述标识 信息和所述被叫用户号码信息进行呼叫处理之后， 还包括：
所述媒体网关接收到所述呼叫成功的信息， 为所述媒体网关上的用 户和所述其它媒体网关上的用户建立通信连接。 才艮据权利要求 3所述的方法， 其中， 在所述其它网关媒体才艮据所述标识 信息和所述被叫用户号码信息进行呼叫处理之后， 还包括：
所述媒体网关接收到所述呼叫失败的信息， 则结束所述媒体网关上 用户的呼叫。 一种媒体网关， 包括：
确定模块， 设置为确定其协议接口中断；
查询模块， 设置为当所述媒体网关的用户摘机时， 查询与其所在的 媒体网关相连接的其他媒体网关；
发送模块， 设置为发送初始消息， 其中， 所述初始消息携带有所述 用户的呼叫标识信息和所述用户呼叫的被叫用户号码信息；
接收模块， 设置为接收相连的其它媒体网关发送的初始消息； 处理模块， 设置为根据所述标识信息和所述被叫用户号码信息进行 呼叫处理。 根据权利要求 6所述的媒体网关， 其中， 还包括：
第一配置模块， 设置为配置其内部的用户号码；
第二配置模块， 设置为配置与其相连的所述其它媒体网关的用户号 码的匹配表。 根据权利要求 7所述的媒体网关， 其中， 所述处理模块包括：
第一判断子模块， 设置为判断所述被叫用户号码信息和所述匹配表 是否匹配； 确定子模块， 设置为在所述第一判断子模块的判断结果为匹配时， 确定所述被叫用户号码信息对应的用户为所述其它媒体网关的用户； 第二判断子模块， 设置为判断所述被叫用户号码信息对应的用户是 否空闲；
第一发送子模块，设置为在所述第二判断子模块的判断结果为是时， 将呼叫成功的信息发送给所述媒体网关；
第二发送子模块，设置为在所述第二判断子模块的判断结果为否时， 将呼叫失败的信息发送给所述媒体网关。
9. 根据权利要求 8所述的媒体网关， 其中， 还包括：
连接模块， 设置为当接收到所述呼叫成功的信息时， 为所述媒体网 关上的用户和所述其它媒体网关上的用户建立通信连接。
10. 根据权利要求 8所述的媒体网关， 其中， 还包括：
结束模块， 设置为当接收到所述呼叫失败的信息， 结束所述媒体网 关上用户的呼叫。
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