WO2012009916A1 - 一种分组核心网呼叫传统电路域网络用户的方法及系统 - Google Patents

一种分组核心网呼叫传统电路域网络用户的方法及系统 Download PDF

Info

Publication number
WO2012009916A1
WO2012009916A1 PCT/CN2010/079059 CN2010079059W WO2012009916A1 WO 2012009916 A1 WO2012009916 A1 WO 2012009916A1 CN 2010079059 W CN2010079059 W CN 2010079059W WO 2012009916 A1 WO2012009916 A1 WO 2012009916A1
Authority
WO
WIPO (PCT)
Prior art keywords
control unit
call
media gateway
message
gateway control
Prior art date
Application number
PCT/CN2010/079059
Other languages
English (en)
French (fr)
Inventor
高明刚
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 US13/583,632 priority Critical patent/US8761157B2/en
Priority to EP10854946.0A priority patent/EP2536078B1/en
Publication of WO2012009916A1 publication Critical patent/WO2012009916A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M7/00Arrangements for interconnection between switching centres
    • H04M7/12Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks

Definitions

  • the present invention relates to an interworking technology between a packet core network and a traditional circuit domain network using SIP (Session Initiation Protocol) as call control signaling in a mobile communication technology, and more particularly, the invention relates to a packet core network calling a traditional circuit domain network user Method and system. Background technique
  • IMS Internet Protocol Multimedia Subsystem
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • a target application network that implements packet voice and multimedia information services.
  • the IMS uses the IP (Internet Protocol) packet domain as the bearer channel for its control signaling and media transmission, and uses SIP as the call control signaling to implement service management, session control, and bearer access. Separation.
  • IP Internet Protocol
  • IMS is a standard that is still being improved.
  • LTE networks have not fully realized interworking with traditional circuit domain networks. Interoperability between LTE networks and traditional circuit domain network services is particularly important because packet networks and traditional circuit domain networks coexist for a long time. How to deal with the intercommunication problem between the IMS network and the traditional circuit domain during the call will become a problem that the LTE network needs to solve.
  • FIG. 1 shows the flow in a PSTN (Public Switched Telephone Network) in the current 3GPP standard.
  • I AM Initial Address Message, Start Address Message
  • ANM Answer Message
  • the media gateway control unit controls the opening of the media stream channel through the H.248 protocol. If the called UE (User Equipment) is not found during the IAM addressing process, then a series of processes performed before the IAM addressing is a waste of resources. In addition, since the media stream channel is opened after the ANM, the ringing tone and the prompt tone of the called party cannot be heard.
  • UE User Equipment
  • An "early media” technique is provided in RFC 3959 issued by the Internet Engineering Task Force (IETF) to open the media stream channel after the calling and called parties complete the media negotiation in the Offer/Answer mode.
  • IETF Internet Engineering Task Force
  • This method can solve the above problems, it brings a new problem: In the above requirements, when the calling user and the called user belong to different networks, the two cannot be directly used.
  • Early media technology, media negotiation is between the calling UE and the media gateway control unit. Since the media gateway control unit initiates a call to the PSTN after completing the media negotiation, this solution can solve the problem of receiving the ringing tone and the prompt tone during the call, but at the same time, there is also a greater consumption of resources. If the IAM addressing is unsuccessful, all previous processes are a waste of resources.
  • the media gateway control unit when the media gateway control unit receives an ACM (Address Complete Message) from the traditional circuit domain network, it instructs the media gateway to open the media stream channel.
  • ACM Address Complete Message
  • the media control device of the calling user receives the 180 Ringing response message, if the media negotiation in the Offer/Answer mode has been completed before, the media stream channel is directly opened, otherwise the calling UE starts to perform with the media gateway control unit.
  • Media negotiation in the Offer/Answer mode After the negotiation is completed, the media stream channel is opened. Based on this process, another solution corresponding to it is shown in Figure 3.
  • the Media Gateway Control Unit After receiving the Invite (Invitation Request) message, the Media Gateway Control Unit does not The media negotiation process of the Offer/Answer mode will be performed immediately with the calling UE, but when the ACM from the traditional circuit domain network is received, the 180Ring or 183 Session Progress response message will be used to start the offer with the calling party. /Answer mode media negotiation. After the media negotiation is completed, the media control device of the calling user opens the media stream channel.
  • the main technical problem to be solved by the present invention is to provide a method and system for calling a core network to call a user of a traditional circuit domain, which can provide better user-friendliness for the service.
  • a method for a packet core network to call a user of a traditional circuit domain network comprising: after receiving a request message sent by a call session control unit, the media gateway control unit sends a first call progress message to the call session control unit, where The first call progress message carries a preset waiting tone; the media gateway control unit sends a start address message to the traditional circuit domain network, and starts a preset timer; if the timer exceeds a preset time, and If the traditional circuit domain network does not respond, the media gateway control unit sends a second call progress message to the call session control unit, where the second call progress message carries a preset tone that the other party cannot temporarily connect.
  • the media gateway control unit performs processing according to a preset policy.
  • the processing by the media gateway control unit according to the preset policy includes: if the preset policy is to abort to continue waiting, the call session control unit sends the second call progress message to the calling user terminal, where the second The call progress message carries a preset tone that the other party cannot temporarily connect.
  • the processing by the media gateway control unit according to the preset policy includes: if the preset policy is to continue waiting, the media gateway control unit and the call session control unit perform media negotiation.
  • the method further includes: when the media negotiation is performed, if the media gateway control unit receives an address completion message from the traditional circuit domain network, the media gateway control unit waits for the media negotiation to end and then processes the The address completion message is described.
  • the processing the address completion message includes: the media gateway control unit translating the address response message into a ringing response message, and transmitting the ringing response message to the call conference control unit.
  • the processing the address completion message further includes: the media gateway control unit updating a connection parameter between the media gateway control unit and the call session control unit.
  • the processing the address completion message further includes: after receiving the response message from the traditional circuit domain network, the media gateway control unit opens the media stream channel for the calling user terminal to make a call with the traditional circuit domain network user. .
  • the media negotiation is in the "provide/answer" mode.
  • the packet core network is an internet protocol multimedia subsystem network.
  • a system in which a packet core network calls a traditional circuit domain network user including a media gateway control unit and a call session control unit,
  • the media gateway control unit is configured to: after receiving the request message sent by the call session control unit, send a first call progress message to the call session control unit, and carry the pre-process in the first call progress message. Please wait for the tone;
  • the media gateway control unit is further configured to send a start address message to the traditional circuit domain network, and start a preset timer; if the timer exceeds a preset time, and the traditional circuit domain network does not respond,
  • the media gateway control unit sends a second call progress message to the call session control unit, where the second call progress message carries a preset tone that the remote party cannot temporarily connect, and performs processing according to a preset policy.
  • the beneficial effects of the present invention are: In the IAM addressing process, the first call progress message carrying the preset prompt ring tone or prompt message is sent back, allowing the user to wait, which enhances the user friendliness of the service.
  • the network can select different policies to respond to the called party's long-term non-response state, so that the calling UE can know the status of the called party in time, and enhance the user friendliness of the service, if the network selects the policy. If you give up the call after a long period of no response, you can avoid waiting for waste of resources.
  • FIG. 4 is a schematic flow chart of an embodiment of a method of the present invention. detailed description
  • the present invention provides a communication system for a packet core network to call a user of a conventional circuit domain network, and the entities included in the system are as follows:
  • the calling UE is a traditional fixed telephone, ISDN (Integrated Services Digital Network) terminal, SIP terminal, H.323 terminal, softphone, GSM (Global System for Mobile communications, Global Mobile Communications) System) mobile phone,
  • CDMA Code Division Multiple Access
  • 3G mobile phone 3G mobile phone
  • WLAN Wireless Local Area Network, wireless local area network
  • PHS Personal Handyphone System
  • the call session control unit provides functions such as call control and routing connection for the registered users accessing the packet core network;
  • the media gateway control unit provides interworking control functions for mutual calls between registered users accessing the packet core network and other traditional circuit domain network users, and completes translation of SIP and other call control protocols.
  • the media gateway control unit is further configured to: after receiving the request message sent by the call session control unit, send a first call progress message to the call session control unit, where the first call progress message carries a preset request Waiting for the tone; in addition, the media gateway control unit also sends an IAM to the traditional circuit domain network, and starts a preset timer; if the timer exceeds the preset time, and the traditional circuit domain network does not respond, the media gateway controls The unit sends a second call progress message to the call session control unit, where the second call progress message carries a preset tone that the remote party cannot temporarily connect, and the media gateway control unit performs processing according to the preset policy.
  • the present invention provides a method for a packet core network to call a conventional circuit domain.
  • the method is described by taking a packet core network as an IMS network as an example.
  • the process of the method embodiment includes the following steps. :
  • Step 401 The calling UE initiates a call, and sends an Invite message to the call session control unit.
  • the call session control unit resolves to the called party belonging to the legacy circuit domain network and then sends an Invite message to the media gateway control unit.
  • Step 402 The media gateway control unit sends a first call progress message (ie, 183 Session Progress response message) to the call session control unit, indicating that the caller is connected to the called party.
  • the call conference control unit delivers to the calling UE 183
  • the Session Progress response message indicates that the called party is in contact with the called party.
  • Step 403 The media gateway control unit sends an IAM to the traditional circuit domain network to perform an addressing process.
  • Step 404 At the same time as step 403, the media gateway control unit enables the wait timer.
  • the media gateway control unit sends a second call progress message (ie, another 183 Session Progress message) to the call session control unit, where the message carries the preset
  • a second call progress message ie, another 183 Session Progress message
  • the calling UE is notified that the other party is unreachable.
  • the calling network may choose to abandon the call, or may continue to wait for the response tone of the other party. This avoids unnecessary waiting processes and increases friendliness.
  • the above preset policies can be the following two strategies:
  • the media negotiation process begins (i.e., step 406). During the media negotiation process, if the packet network receives the ACM (that is, the called party is reachable), the message is not processed temporarily. After the media negotiation is completed, the media gateway control unit processes the message again. Through this process, you can prepare for responding to ACM in advance, improving the parallelism of business processes and improving the processing efficiency of subsequent processes.
  • Step 406 The media gateway control unit and the call session control unit create an interactive connection through H.248.
  • Steps 407 to 417 and the prior art scheme 1 ie, the flow in the PSTN of the 3GPP standard
  • Steps 104 through 116 in the scheme are similar.
  • Step 407 After the traditional circuit domain network finds the called party address, sends the ACM to the media gateway control unit, and the media gateway control unit translates the message into a 180 Ring response message and sends the message to the call session control unit, and the response message is transmitted by the call session control unit.
  • the calling UE is given, followed by resource reconfiguration and connection parameter update.
  • Step 408 The call session control unit and the media gateway control unit modify the connection through H.248 to reserve resources.
  • Step 409 The call session control unit sends a Conf Ack (Opt SDP) message to the calling UE.
  • a Conf Ack Opt SDP
  • Step 410 The call session control unit and the media gateway control unit reserve resources.
  • Step 411 The calling UE initiates a reservation Conf message to the call session control unit.
  • Step 412 The call session control unit sends a reserved Conf message to the calling UE.
  • Step 413 The call session control unit also sends a Ring response message to the calling UE.
  • Step 415 The call session control unit and the media gateway control unit perform H.248 media interaction, and instruct the media gateway to open the media stream.
  • Step 416 The call session control unit delivers a 200 OK response message to the calling UE.
  • Step 417 The calling UE sends an ACK to the call session control unit.
  • the calling UE and the called party start a normal call, and the entire call process is completed.
  • the calling UE is a user of the packet core network; the called party is a user of a traditional circuit domain network, such as an ISDN or PSTN user.
  • the network can select different strategies to respond to the state of the called party's traditional circuit domain network for a long time without response, thereby avoiding waiting for waste of resources, and also allowing the calling UE to know in time
  • the state of the calling party enhances the user-friendliness of the business.
  • the present invention is applicable to all packet core networks using SIP as call control signaling and IMS architecture, such that the packet core network The calling user can receive the ring tone sent by the traditional circuit domain.

Landscapes

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

Description

一种分组核心网呼叫传统电路域网络用户的方法及系统 技术领域
本发明涉及移动通信技术中以 SIP ( Session Initiation Protocol, 会话发 起协议) 为呼叫控制信令的分组核心网和传统电路域网络的互通技术, 尤 其涉及一种分组核心网呼叫传统电路域网络用户的方法及系统。 背景技术
IMS ( IP Multimedia Subsystem, 网际协议多媒体子系统)是 3GPP ( 3rd Generation Partnership Project, 第三代合作伙伴计划) 网络中的一个网间互 联协议多媒体子系统, 将来会成为 LTE ( Long Term Evolution, 长期演进) 实现分组语音和多媒体信息业务的目标应用网络。
IMS釆用 IP ( Internet Protocol, 网间互联协议)分组域作为其控制信 令和媒体传输的承载通道, 釆用 SIP作为呼叫控制信令, 实现了业务管理、 会话控制以及承载接入的三者分离。
IMS是一个还在不断完善的标准, 目前对于 LTE网络还没有完全实现 与传统电路域网络的互通。 由于在很长一段时间内分组网络和传统电路域 网络共存, LTE 网络与传统电路域网络业务的互通性尤其重要。 如何处理 IMS网络和传统电路域之间在呼叫过程中的互通问题将成为 LTE网络需要 解决的问题。
目前也已经有相关的专利和标准研究过此领域的问题。 其中的关注重 点为呼叫的效率和对方信号音的处理。 目前相关的技术方案主要有:
现有技术方案一:
图 1给出了目前 3GPP标准中的一个 PSTN ( Public Switched Telephone Network ,公共交换电话网络)中的流程。从图 1可以看出,在进行 I AM( Initial Address Message, 起始地址消息)寻址之前, 媒体网关控制单元就进行了 一系列的 H.248 协议交互过程。 直到传统电路域网络发送 ANM ( Answer Message, 应答消息) 时, 媒体网关控制单元才通过 H.248协议控制打开媒 体流通道。 如果在 IAM寻址过程中并未找到被叫 UE ( User Equipment, 用 户设备), 那么, 在 IAM寻址之前所进行的一系列的流程就是对资源的一 种浪费。 此外, 由于媒体流通道是在 ANM之后打开的, 所以被叫方的铃音 和提示音也无法收听到。
现有技术方案二:
IETF ( Internet Engineering Task Force,互联网工程任务组 )发布的 RFC 3959 中给出了一种 "early media" 技术, 在主叫和被叫完成 Offer/Answer 模式的媒体协商之后就打开媒体流通道。 这种方法虽然能解决上述问题, 但是它带来的一个新的问题是: 在上述的需求中, 主叫用户和被叫用户分 属不同的网络时, 两者之间并不能直接釆用 "early media" 技术, 媒体协商 是主叫 UE和媒体网关控制单元之间进行的。由于媒体网关控制单元是在完 成媒体协商后再向 PSTN发起呼叫, 因此这种方案虽然能够解决呼叫过程 中被叫铃音和提示音的接收问题, 但是同时也存在着对资源的更大消耗, 如果 IAM寻址不成功, 则所有之前的流程都是对资源的浪费。
现有技术方案三:
如图 2 所示, 当媒体网关控制单元收到来自传统电路域网络的 ACM ( Address Complete Message, 地址全消息) 时, 指示媒体网关打开媒体流 通道。 主叫用户的媒体控制设备在收到 180Ring (振铃)响应消息时, 如果 此前已经完成了 Offer/Answer模式的媒体协商, 则直接打开媒体流通道, 否则主叫 UE开始和媒体网关控制单元进行 Offer/Answer模式的媒体协商, 协商完成后打开媒体流通道。 在这个流程基础上, 与之相应的另一种解决 方案如图 3所示, 媒体网关控制单元在收到 Invite (邀请请求)消息后, 不 会立即和主叫 UE进行 Offer/Answer模式的媒体协商过程,而是在收到来自 传统电路域网络的 ACM时,才会通过 180Ring或者 183 Session Progress(会 话进程) 响应消息开始和主叫进行 Offer/Answer模式的媒体协商。 媒体协 商完成后, 主叫用户的媒体控制设备打开媒体流通道。
然而, 上述技术方案均未考虑以下几点:
( 1 ) 由于进行了跨网络的寻址, 寻址过程一般会比较长, 寻址过程中 对于主叫用户无状态指示, 用户使用友好性差;
( 2 )在进行 IAM寻址的过程中, 如果遇到传统电路域网络出现问题 或者被叫 UE已经脱离服务区时, 如果一直等待传统电路域网络反馈 IAM 寻址失败的消息, 会白白浪费不少的时间;
( 3 )在 IAM寻址之前就进行 Offer/Answer模式的媒体协商, 一旦找 不到被叫用户的地址, 则之前的无效的 Offer/Answer模式的媒体协商就是 对资源的额外的浪费。 发明内容
有鉴于此, 本发明要解决的主要技术问题是, 提供一种分组核心网呼 叫传统电路域用户的方法及系统, 能够为业务提供较好的用户使用友好性。
为解决上述技术问题, 本发明的技术方案是这样实现的:
一种分组核心网呼叫传统电路域网络用户的方法, 包括: 媒体网关控 制单元接收到呼叫会话控制单元发送来的请求消息后, 向所述呼叫会话控 制单元发送第一呼叫进程消息, 在所述第一呼叫进程消息中携带预设的请 等待的提示音; 媒体网关控制单元向传统电路域网络发送起始地址消息, 并启动预设的定时器; 若所述定时器超出预设时间, 且所述传统电路域网 络没有回应, 则所述媒体网关控制单元向所述呼叫会话控制单元发送第二 呼叫进程消息, 所述第二呼叫进程消息中携带预设的对方暂时无法接通的 提示音, 所述媒体网关控制单元根据预设策略进行处理。 所述媒体网关控制单元根据预设策略进行处理包括: 若所述预设策略 为放弃继续等待, 则所述呼叫会话控制单元向主叫用户终端发送所述第二 呼叫进程消息, 所述第二呼叫进程消息中携带预设的对方暂时无法接通的 提示音。
所述媒体网关控制单元根据预设策略进行处理包括: 若所述预设策略 为继续等待, 则所述媒体网关控制单元和所述呼叫会话控制单元进行媒体 协商。
该方法还包括: 在进行所述媒体协商时, 若所述媒体网关控制单元接 收到来自所述传统电路域网络的地址完成消息, 所述媒体网关控制单元等 待所述媒体协商结束后再处理所述地址完成消息。
所述处理所述地址完成消息包括: 所述媒体网关控制单元将所述地址 回应消息转译为振铃响应消息, 并将所述振铃响应消息发送给所述呼叫会 话控制单元。
所述处理所述地址完成消息还包括: 所述媒体网关控制单元更新媒体 网关控制单元与呼叫会话控制单元之间的连接参数。
所述处理所述地址完成消息还包括: 所述媒体网关控制单元接收到来 自所述传统电路域网络的应答消息后, 打开媒体流通道供主叫用户终端与 所述传统电路域网络用户进行通话。
所述媒体协商为 "提供 /应答" 模式。
所述分组核心网是网际协议多媒体子系统网络。
一种分组核心网呼叫传统电路域网络用户的系统, 包括媒体网关控制 单元和呼叫会话控制单元,
所述媒体网关控制单元, 用于在接收到所述呼叫会话控制单元发送来 的请求消息后, 向所述呼叫会话控制单元发送第一呼叫进程消息, 在所述 第一呼叫进程消息中携带预设的请等待的提示音; 所述媒体网关控制单元, 还用于向传统电路域网络发送起始地址消息, 同时启动预设的定时器; 若所述定时器超出预设时间, 且所述传统电路域 网络没有回应, 则所述媒体网关控制单元向所述呼叫会话控制单元发送第 二呼叫进程消息, 所述第二呼叫进程消息中携带预设的对方暂时无法接通 的提示音, 根据预设策略进行处理。
本发明的有益效果是: 在 IAM寻址过程中, 回送携带预置的提示铃音 或者提示语的第一呼叫进程消息, 让用户进行等待, 增强了业务的用户使 用友好性。 同时, 通过定时机制, 网络可以选择不同的策略回应被叫方长 时间无回应的状态,从而让主叫 UE及时知道被叫方的状态,增强了业务的 用户使用友好性, 若网络选择的策略是长时间无回应后放弃呼叫, 则可避 免对资源的等待浪费。 附图说明
图 1是现有技术方案一的流程示意图;
图 2是现有技术方案三的一种实施例的流程示意图;
图 3是现有技术方案三的另一种实施例的流程示意图;
图 4是本发明方法实施例的流程示意图。 具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
本发明提供了一种分组核心网呼叫传统电路域网络用户的通信系统, 该系统包括的各个实体如下:
1 )主叫 UE,为传统固定话机、 ISDN( Integrated Services Digital Network, 综合业务数字网 )终端、 SIP终端、 H.323终端、 软终端(softphone )、 GSM ( Global System for Mobile communications, 全球移动通信系统)手机、
CDMA ( Code Division Multiple Access, 码分多址)手机、 3G手机、 WLAN ( Wireless Local Area Network , 无线局域网 ) 终端、 PHS ( Personal Handyphone System, 个人手持电话系统)之类的任意可以接入分组核心网 的通信终端;
2 )呼叫会话控制单元, 为接入分组核心网的注册用户提供呼叫控制、 路由接续等功能;
3 )媒体网关控制单元, 为接入分组核心网的注册用户和其他传统电路 域网络用户之间的相互呼叫提供互通控制功能, 完成 SIP和其它呼叫控制 协议的转译。 在本发明中, 媒体网关控制单元还用于在接收到呼叫会话控 制单元发送来的请求消息后, 向呼叫会话控制单元发送第一呼叫进程消息, 该第一呼叫进程消息中携带预设的请等待的提示音; 此外, 媒体网关控制 单元还向传统电路域网络发送 IAM, 同时启动预设的定时器; 若所述定时 器超出预设时间, 且传统电路域网络没有回应, 则媒体网关控制单元向呼 叫会话控制单元发送第二呼叫进程消息, 该第二呼叫进程消息中携带预设 的对方暂时无法接通的提示音, 媒体网关控制单元根据预设策略进行处理。
对应于上述系统, 本发明提供了一种分组核心网呼叫传统电路域的方 法, 如图 4所示, 该方法以分组核心网为 IMS网络为例进行说明, 该方法 实施例的流程包括如下步骤:
步骤 401、 主叫 UE发起呼叫, 向呼叫会话控制单元发送 Invite消息。 呼叫会话控制单元解析到被叫方属于传统电路域网络, 然后向媒体网关控 制单元发送 Invite消息。
步骤 402、媒体网关控制单元向呼叫会话控制单元发送第一呼叫进程消 息 (即 183 Session Progress响应消息 ), 指示正在和被叫方接续中。 呼叫会 话控制单元向主叫 UE传递 183 Session Progress响应消息指示正在和被叫方 接续中。
在该步骤中, 还通过 183 Session Progress响应消息传回网络预置的提 示铃音或者提示语, 让用户进行等待, 增强了业务的用户使用友好性。 步骤 403、 媒体网关控制单元向传统电路域网络发送 IAM, 进行寻址 过程。
步骤 404、在执行步骤 403的同时,媒体网关控制单元启用等待定时器
Tl。
405、 如果在 T1超时之后仍未收到被叫方的回应, 则媒体网关控制单 元向呼叫会话控制单元发送第二呼叫进程消息 (即, 另一个 183 Session Progress 消息), 该消息携带预置的对方暂时无法接通提示音, 根据预设的 策略, 通知主叫 UE对方不可达, 主叫网络可以选择放弃此次呼叫, 也可以 继续等待一直收到对方的回应音。 这样可以避免无谓的等待过程, 同时增 强了友好性。
上述预设的策略可以是以下两种策略:
( 1 )放弃继续等待, 即, 如果主叫 UE的网络选择定时器 T1超时之 后就认为被叫方不可达, 则直接结束呼叫过程, 同时返回 183 Session Progress响应消息, 该消息携带合理的提示音。 这样既可以避免资源的等待 浪费, 也可以让主叫 UE及时知道被叫方的状态。
( 2 )除非被叫方网络返回响应消息, 否则继续等待。 如果选择这种策 略, 则此时开始进行媒体协商过程(即步骤 406 )。 在进行媒体协商过程中, 如果分组网络收到 ACM (即说明已可达被叫方), 则暂时不处理此消息, 等待媒体协商完毕之后, 媒体网关控制单元再处理此消息。 通过这种处理 流程可以提前为响应 ACM做好准备,提高了业务流程的并行度, 进而提高 后续流程的处理效率。
步骤 406、媒体网关控制单元和呼叫会话控制单元通过 H.248创建交互 连接。
步骤 407至步骤 417与现有技术方案一(即 3GPP标准的 PSTN中的流 程方案) 中的步骤 104至步骤 116相似。
步骤 407、 传统电路域网络找到被叫方地址后, 发送 ACM至媒体网关 控制单元, 由媒体网关控制单元转译为 180 Ring响应消息并发送给呼叫会 话控制单元, 由呼叫会话控制单元传递该响应消息给主叫 UE, 之后进行资 源重配和连接参数更新。
步骤 408、呼叫会话控制单元和媒体网关控制单元通过 H.248修改连接 以保留资源。
步骤 409、 呼叫会话控制单元向主叫 UE发送 Conf Ack ( Opt SDP ) 消 息。
步骤 410、 呼叫会话控制单元和媒体网关控制单元保留资源。
步骤 411、 主叫 UE向呼叫会话控制单元发起保留 Conf消息。
步骤 412、 呼叫会话控制单元向主叫 UE发送保留 Conf消息。
步骤 413、 呼叫会话控制单元同时还向主叫 UE发送 Ring响应消息。 步骤 414、 被叫方接收呼叫后, 发送 ANM至媒体网关控制单元, 由媒 体网关控制单元传递该 ANM给呼叫会话控制单元。
步骤 415、呼叫会话控制单元和媒体网关控制单元进行 H.248媒体交互, 并指示媒体网关打开媒体流。
步骤 416、 呼叫会话控制单元向主叫 UE传递 200 OK响应消息。
步骤 417、 主叫 UE发送 ACK给呼叫会话控制单元。
至此主叫 UE和被叫方之间开始正常通话, 整个呼叫流程完成。
本发明各实施例中,主叫 UE为分组核心网的用户; 被叫方是传统电路 域网络的用户, 如 ISDN或 PSTN用户。
由上述方法实施例可见, 本发明的优势在于:
( 1 )在 IAM寻址过程中, 回送 183 Session Progress响应消息, 该消 息携带预置的提示铃音或者提示语, 让用户进行等待, 增强了业务的用户 使用友好性。
( 2 )在 IAM寻址过程中通过定时机制, 网络可以选择不同的策略回 应被叫方传统电路域网络长时间无回应的状态, 从而避免资源的等待浪费, 也可以让主叫 UE及时知道被叫方的状态, 增强了业务的用户使用友好性。
( 3 )如果在 IAM寻址过程中定时器超时且网络选择继续尝试的情况 下, 则此时才开始进行媒体协商过程, 为即将收到的对方回应开始准备。 从而充分利用了网络的等待时间, 提高了业务流程的并行度, 进而提高后 续流程的处理效率。
( 4 )将连接参数的修改和更新安排在收到被叫方的 ACM之后, 如果 主叫的确找不到被叫用户, 或者被叫网络发生失败时无需再进行会话参数 更新流程, 从而节省了网络资源, 避免不合理的网络资源浪费。
由于 3GPP定义的 IMS其实是一种以 SIP作为呼叫控制信令的分组核 心网, 因此, 本发明适用于所有使用 SIP作为呼叫控制信令和 IMS架构类 似的分组核心网, 使得该分组核心网的主叫用户可以接收到传统电路域送 来的铃音。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明, 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的 普通技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干简单 推演或替换, 都应当视为属于本发明的保护范围。

Claims

权利要求书
1、 一种分组核心网呼叫传统电路域网络用户的方法, 其特征在于, 包 括:
媒体网关控制单元接收到呼叫会话控制单元发送来的请求消息后, 向 所述呼叫会话控制单元发送第一呼叫进程消息, 在所述第一呼叫进程消息 中携带预设的请等待的提示音;
媒体网关控制单元向传统电路域网络发送起始地址消息, 并启动预设 的定时器;
若所述定时器超出预设时间, 且所述传统电路域网络没有回应, 则所 述媒体网关控制单元向所述呼叫会话控制单元发送第二呼叫进程消息, 所 述第二呼叫进程消息中携带预设的对方暂时无法接通的提示音, 所述媒体 网关控制单元根据预设策略进行处理。
2、 如权利要求 1所述的方法, 其特征在于, 所述媒体网关控制单元根 据预设策略进行处理包括: 若所述预设策略为放弃继续等待, 则所述呼叫 会话控制单元向主叫用户终端发送所述第二呼叫进程消息, 所述第二呼叫 进程消息中携带预设的对方暂时无法接通的提示音。
3、 如权利要求 1所述的方法, 其特征在于, 所述媒体网关控制单元根 据预设策略进行处理包括: 若所述预设策略为继续等待, 则所述媒体网关 控制单元和所述呼叫会话控制单元进行媒体协商。
4、 如权利要求 3所述的方法, 其特征在于, 该方法还包括: 在进行所 述媒体协商时, 若所述媒体网关控制单元接收到来自所述传统电路域网络 的地址完成消息, 所述媒体网关控制单元等待所述媒体协商结束后再处理 所述地址完成消息。
5、 如权利要求 4所述的方法, 其特征在于, 所述处理所述地址完成消 息包括: 所述媒体网关控制单元将所述地址回应消息转译为振铃响应消息, 并将所述振铃响应消息发送给所述呼叫会话控制单元。
6、 如权利要求 4所述的方法, 其特征在于, 所述处理所述地址完成消 息还包括: 所述媒体网关控制单元更新媒体网关控制单元与呼叫会话控制 单元之间的连接参数。
7、 如权利要求 4所述的方法, 其特征在于, 所述处理所述地址完成消 息还包括: 所述媒体网关控制单元接收到来自所述传统电路域网络的应答 消息后, 打开媒体流通道供主叫用户终端与所述传统电路域网络用户进行 通话。
8、 如权利要求 3至 7任一所述的方法, 其特征在于, 所述媒体协商为 "提供 /应答" 模式。
9、 如权利要求 1至 7任一所述的方法, 其特征在于, 所述分组核心网 是网际协议多媒体子系统网络。
10、 一种分组核心网呼叫传统电路域网络用户的系统, 包括媒体网关 控制单元和呼叫会话控制单元, 其特征在于:
所述媒体网关控制单元, 用于在接收到所述呼叫会话控制单元发送来 的请求消息后, 向所述呼叫会话控制单元发送第一呼叫进程消息, 在所述 第一呼叫进程消息中携带预设的请等待的提示音;
所述媒体网关控制单元, 还用于向传统电路域网络发送起始地址消息, 同时启动预设的定时器; 若所述定时器超出预设时间, 且所述传统电路域 网络没有回应, 则所述媒体网关控制单元向所述呼叫会话控制单元发送第 二呼叫进程消息, 所述第二呼叫进程消息中携带预设的对方暂时无法接通 的提示音, 根据预设策略进行处理。
PCT/CN2010/079059 2010-07-23 2010-11-24 一种分组核心网呼叫传统电路域网络用户的方法及系统 WO2012009916A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/583,632 US8761157B2 (en) 2010-07-23 2010-11-24 Method and system for calling traditional circuit switched domain network user by packet core network
EP10854946.0A EP2536078B1 (en) 2010-07-23 2010-11-24 Method and system for packet core network calling traditional circuit domain network users

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010235493.9 2010-07-23
CN201010235493.9A CN101931907B (zh) 2010-07-23 2010-07-23 一种分组核心网呼叫传统电路域网络用户的方法及系统

Publications (1)

Publication Number Publication Date
WO2012009916A1 true WO2012009916A1 (zh) 2012-01-26

Family

ID=43370764

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/079059 WO2012009916A1 (zh) 2010-07-23 2010-11-24 一种分组核心网呼叫传统电路域网络用户的方法及系统

Country Status (4)

Country Link
US (1) US8761157B2 (zh)
EP (1) EP2536078B1 (zh)
CN (1) CN101931907B (zh)
WO (1) WO2012009916A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103078846B (zh) * 2012-12-20 2017-03-15 华为技术有限公司 Ims架构下信息传送方法、装置和通信系统
CN107087039B (zh) * 2016-02-15 2021-10-01 王正伟 交换方法和交换云

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765912B1 (en) * 2000-08-08 2004-07-20 Nortel Networks Limited Network resource usage in call sessions
CN1929457A (zh) * 2006-09-22 2007-03-14 中国移动通信集团公司 Ims域与cs域消息互通的方法
CN101442587A (zh) * 2008-09-12 2009-05-27 宇龙计算机通信科技(深圳)有限公司 一种移动终端的锁屏/锁键方法和系统及其移动终端

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7336649B1 (en) * 1995-12-20 2008-02-26 Verizon Business Global Llc Hybrid packet-switched and circuit-switched telephony system
US6292479B1 (en) * 1997-03-19 2001-09-18 Bell Atlantic Network Services, Inc. Transport of caller identification information through diverse communication networks
JP3689580B2 (ja) * 1999-01-29 2005-08-31 株式会社日立製作所 インタネット電話接続方法、帯域管理装置及びゲートキーパー装置
US7042859B2 (en) * 2003-09-02 2006-05-09 Santera Systems, Inc. Methods and systems for performing call handover in a media gateway
US20070153766A1 (en) * 2004-04-16 2007-07-05 Nortel Networks Limited System and method for providing early ringback by a home legacy mobile station domain network
CN100563282C (zh) * 2005-05-29 2009-11-25 华为技术有限公司 网络互通时主叫用户终端听被叫信号音的方法
US20080192655A1 (en) * 2007-02-09 2008-08-14 Ted Vagelos Systems And Methods For Providing Enhanced Telephone Services
CN101448203B (zh) * 2008-04-11 2010-12-08 中兴通讯股份有限公司 控制早媒体播放的实现方法
JP2010130389A (ja) * 2008-11-28 2010-06-10 Hitachi Ltd 通信システム、管理装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765912B1 (en) * 2000-08-08 2004-07-20 Nortel Networks Limited Network resource usage in call sessions
CN1929457A (zh) * 2006-09-22 2007-03-14 中国移动通信集团公司 Ims域与cs域消息互通的方法
CN101442587A (zh) * 2008-09-12 2009-05-27 宇龙计算机通信科技(深圳)有限公司 一种移动终端的锁屏/锁键方法和系统及其移动终端

Also Published As

Publication number Publication date
CN101931907A (zh) 2010-12-29
EP2536078A4 (en) 2014-02-19
US20120327930A1 (en) 2012-12-27
EP2536078B1 (en) 2016-10-12
CN101931907B (zh) 2014-03-12
US8761157B2 (en) 2014-06-24
EP2536078A1 (en) 2012-12-19

Similar Documents

Publication Publication Date Title
JP4571618B2 (ja) 会話型ベアラの交渉
JP4988338B2 (ja) 会話型ベアラネゴシエーション
US8213419B2 (en) Interworking network element, interworking system between the CSI terminal and the IMS terminal and the method thereof
EP1786162B1 (en) Method for the calling user terminal listening to the signal tone of the called user terminal when inter-networking
EP1909438A1 (en) An apparatus for a traditional terminal to access an ims system and the method thereof
WO2006037276A1 (fr) Procede d'intercommunication entre des reseaux possedant des versions differentes du protocole internet
WO2015062454A1 (zh) 音视频通话方法、设备和系统
WO2008064580A1 (fr) Procédé, système et serveur d'application pour éviter la diaphonie de signal de rappel couleur
WO2007025443A1 (fr) Systeme de passerelle dans un sous-systeme multimedia ip et methode correspondante
US8103260B2 (en) System and method for providing cordless extension of communication devices
WO2009015576A1 (fr) Procédé, système et dispositif pour transformer un service vocal en service de fax
WO2008151481A1 (fr) Procédé pour commander de manière centralisée le service d'implémentation d'appel de terminal dans un sous-système de réseau central multimédia ip
WO2011032424A1 (zh) 一种发起视频辅助语音通话的方法和系统及网络设备
EP2149244A1 (en) A method of and a system for establishing a call over an ip multi media communications system and a circuit switched communications system
WO2012009916A1 (zh) 一种分组核心网呼叫传统电路域网络用户的方法及系统
JP2011526441A (ja) Imsネットワーク内でカスタマイズされたビデオサービスを実現するための方法およびネットワークユニット
WO2008110110A1 (fr) Procédé et système de fourniture de service de sous-système multimédia ip
WO2008086744A1 (fr) Procédé de mise en œuvre d'établissement d'appel, système et élément de réseau de contrôle d'appel
CN100496049C (zh) Sip多媒体系统中用户面互通方法
WO2009092437A1 (en) Completion of fax and analog data call
CN102057701B (zh) 在通信网络中实现呼叫等待功能的方法
WO2010031284A1 (zh) 用户终端、应用服务器以及呼叫建立方法
WO2011035638A1 (zh) 接入网关控制功能用户呼叫转接业务的实现方法及系统
WO2011032425A1 (zh) 呼叫等待业务中区别振铃的实现方法及系统
WO2008017189A1 (fr) système et procédé permettant de réaliser un service pittoresque de tonalité de rappel dans un réseau de sous-système multimédia IP 3G

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10854946

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13583632

Country of ref document: US

REEP Request for entry into the european phase

Ref document number: 2010854946

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2010854946

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE