WO2007054020A1 - Méthode pour commuter un service vocal en un service iwf - Google Patents

Méthode pour commuter un service vocal en un service iwf Download PDF

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Publication number
WO2007054020A1
WO2007054020A1 PCT/CN2006/002987 CN2006002987W WO2007054020A1 WO 2007054020 A1 WO2007054020 A1 WO 2007054020A1 CN 2006002987 W CN2006002987 W CN 2006002987W WO 2007054020 A1 WO2007054020 A1 WO 2007054020A1
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WO
WIPO (PCT)
Prior art keywords
service
request message
type data
circuit type
update request
Prior art date
Application number
PCT/CN2006/002987
Other languages
English (en)
Chinese (zh)
Inventor
Chengfeng Deng
Guangming Hao
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007054020A1 publication Critical patent/WO2007054020A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels

Definitions

  • the present invention relates to communication technologies, and in particular, to implementing voice service switching to a circuit type in an IP core network and an IP code division multiple access system.
  • a circuit type data service also called an IWF (inter-network interworking function) service.
  • This service allows G3 (Category 3) fax services and asynchronous data services to be initiated by mobile stations. Due to the particularity of the air interface, circuit-type data services are prone to delays, errors, etc. In order to avoid this deficiency, the air interface transmits fax or asynchronous data before modulation, and then in the BSC (Base Station Controller) or MSC.
  • BSC Base Station Controller
  • MSC Mobile Switching Center
  • a device in the (Mobile Switching Center) that is connected to an IWF to perform the modulation process of fax or asynchronous data.
  • the user can implement the IWF service through the service change, that is, the user initiates the voice service first, initiates the service change after the call, and switches to the IWF service.
  • the CDMA system MSC of the circuit domain is connected to the IWF, it is necessary to rely on the BSC-side TC (code converter) to detect the CED (called terminal identification) signal to initiate the IWF service change procedure.
  • the BSC-side TC code converter
  • Step 301 In the voice call, the MS sends an IWF service change request to the BSC, and after the TC of the BSC detects the service change request, sends a Handoff Required message to the MSC, where the Handoff Required message includes: a parameter SO, Indicates the IWF service type; the parameter CDMA Serving One Way Delay is used to indicate the direction of business change.
  • the Handoff Required message includes: a parameter SO, Indicates the IWF service type; the parameter CDMA Serving One Way Delay is used to indicate the direction of business change.
  • Step 302 The MSC determines, according to the service type in the Handoff Required message, that the service is changed by the IWF, selects a circuit of the BSC, and sends an Add message to the MGW (Media Gateway), where the Add message carries BC ( The bearer capability) and the SO parameter require the MGW to insert the IWF resource.
  • Step 304 The MSC sends a Handoff Request message to the destination BSC. Since the service is only a service change, not a location switch, the source BSC and the destination BSC of the handover request are the same BSC.
  • Step 305 The BSC sends a HandoffRequest Acknowledge message to the MSC.
  • Step 306 The MSC sends a Mod (change) command message to the MGW to activate the IWF service, so as to replace the call service with the IWF service, where the Mod message has a parameter Signal indicating the direction of the IWF service.
  • Step 307 The MGW executes the Mod command message to activate the IWF service.
  • the IWF device can start the process of establishing a fax channel, such as PPP negotiation with the MS.
  • Step 308 The MSC sends a HandoffCommand message to the source BSC.
  • Step 309 The BSC sends a Handoff Complete handover complete message to the MSC.
  • Steps 310-315 the MSC changes the topology connection, deletes the original T endpoint, and the process of changing the IWF service is completed.
  • the BSC when the MSC is connected to the IWF, the BSC needs the TC to perform the service change detection.
  • the A interface of the CDMA system and the core network are IPized, since the BSC does not have the TC, if the function is still required to be supported, Therefore, it is necessary to support the detection of circuit type data services in all inter-office TDM (Time Division Multiplexing) time slots of the end office, thereby causing waste of system resources, and also affecting TrFO/TO after IPization ( free codec) Operation/remote pattern conversion operation) and other services.
  • TDM Time Division Multiplexing
  • the embodiment of the invention provides a method for implementing a voice service handover to an IWF service, which can be implemented in an IP-based core network and an IP-based code division multiple access system without requiring a TC.
  • the present invention provides a method for implementing a voice service switching to a circuit type data service, which is applied to an IP core network and an IP code division multiple access system, including:
  • the mobile terminal sends a service change signature to the mobile switching center
  • the mobile switching center sets a bearer update request message according to the service change signature, and sends a bearer update request message to the base station controller;
  • the base station controller sends a handover request message to the mobile switching center according to the bearer update request message; the mobile switching center performs circuit type data service conversion according to the handover request message.
  • the embodiment of the invention also discloses a system for switching a voice service to a circuit type data service, including:
  • a mobile terminal configured to send a service change signature to the mobile switching center
  • a mobile switching center configured to identify a service change signature, and set a bearer update request message according to the service change signature, and send a bearer update request message to the base station controller, where the mobile switching center is further configured to interact with the media gateway to control The media gateway inserts and activates the inter-network interworking function resource; the base station controller is configured to send a handover request message to the mobile switching center to complete the service change process according to the circuit type data service indication and direction in the bearer update request message;
  • the media gateway is configured to manage code converter resources and inter-network interworking function resources under the control of the mobile switching center.
  • FIG. 1 is a flow chart showing the implementation of IWF service changes in the prior art
  • FIG. 2 is a flowchart of implementing an IWF service change according to an embodiment of the present invention. Embodiments of the present invention will now be described in conjunction with the drawings in order to facilitate the understanding of the invention.
  • the MS dials an agreed Feature code when the IWF service is initiated in the voice call, and the MSC obtains the corresponding IWF service and the direction of the I F service according to the Feature code. Then, the BSC is notified of the IF service change by using a Bearer Update Request message, where the Bearer Update Request message carries the direction of the IWF service change and the service type of the IWF, and the BSC sends a Handoff Required message to the MSC. Initiate IWF business changes.
  • the related signaling used in the present invention is first extended.
  • the bearer update request message includes: an A2p bearer special parameter and an A2p session parameter, in order to carry the type of the IWF service and the direction of the IWF service change in the Bearer Update Request message.
  • the A2P bearer special parameters are signal-extended to implement the Bearer Update Request message with the type of the IWF service and the direction of the IWF service change.
  • the format of the A2P bearer special parameter is as follows:
  • the A2P Bearer Format-Specific Parameters include the Bearer Format ID and the RTP Paylod Type Value.
  • the bearer format ID is 4 bits.
  • extension identifier Extension ID
  • extension parameter Extension Parameters
  • extension identifier can be used alone to indicate the direction of the IWF service, or the extension parameter can be used alone to indicate the direction of the IWF service.
  • Step 401 In the voice call state, the MS sends a specific Feature code to the MSC according to the service type and direction of the IWF service change.
  • the Feature code corresponds to a specific IW type and direction. For example, if the Feature code is *970, the voice to fax rate 1 is switched, the direction is sent; The Feature code *971 indicates the voice to fax rate 1 slice. Change, the direction is reception and so on.
  • Step 402 After detecting the change of the Feature Code of the IWF service, the MSC copies the specific IWF type and direction corresponding to the Feature code into a Bearer Update Request message, and then sends a Bearer Update Request message to the BSC to notify the BSC.
  • the IWF service is changed.
  • the A2p parameter of the Bearer Update Request message carries the direction of the IWF service and the service type of the IWF.
  • Step 403 After receiving the Bearer Update Request message, the BSC finds that the A2p parameter carries the IWF service bearer information in the message, and does not send the Bearer Update Response message to the MSC, but directly sends a Handoff Required message to the MSC to initiate the service. Change the process.
  • the Handoff Required Handover Request message carries a SO parameter, a direction parameter, and a flag that the BSC does not perform the conversion of the IWF data to the ISLP data.
  • the BSC fills the service option SO of the Handoff Required message according to the service type information of the Bearer Update Request message A2p parameter, and fills in the CDMA Serving One Way Delay of the Handoff Required message according to the service direction information of the Bearer Update Request message A2p parameter.
  • Step 404 The MSC determines, according to the content in the Handoff Required message, that the IWF service needs to be changed, and records the service type and service direction of the service change.
  • the MSC sends an Add command to the MGW.
  • the message carries the BC and SO parameters, and the MGW is required to insert the IWF resource.
  • Step 405 The MGW allocates a UDP (User Datagram Protocol) port number and address for the A5 interface to the circuit type data service, and allocates a T endpoint corresponding to the UDP port and the address, and the MGW inserts the IWF resource in the T endpoint. And applying for the codec of the IWF data to the ISLP data conversion, and returning a response message to the MSC, where the response message includes the local SDP (Session Contrast Protocol) information.
  • UDP User Datagram Protocol
  • Step 406 The MSC sends a Handoff Request message to the BSC, where the message carries the local SDP information.
  • Step 407 The BSC sends a Handoff Request Acknowledge message to the MSC, where the message carries the remote SDP information of the BSC.
  • Step 408 The MSC sends a Mod (Change) message to the MGW to activate the IWF service.
  • the current call status changes to the fax status.
  • the Mod message has a parameter Signal indicating the IF service direction and the BSC remote SDP information.
  • Step 409 The MGW returns a Mod response to the MSC, and executes a Mod command to activate the IWF service, so that the IWF can start PPP negotiation with the MS to establish a fax channel.
  • Step 410 The MSC sends a Handoff Command message to the BSC.
  • Step 411 The BSC sends a Handoff Complete handover complete message to the MSC.
  • Steps 412-417 the MSC changes the topology connection, deletes the original T endpoint, and the process of changing the IWF service is completed.
  • both the calling and called MSs need to initiate the above IWF service change process.
  • the present invention also provides a system for implementing a voice service to switch to a circuit type data service, comprising: a mobile terminal, configured to send a service change signature to a mobile switching center; and a mobile switching center, configured to identify a service change signature, and according to The service change signature setting bearer update request message is sent to the base station controller, and the mobile switching center is further configured to interact with the media gateway to control the media gateway to insert and activate the IWF resource; the base station controller is configured to: According to the circuit type data service indication and direction in the bearer update request message, the process of the location switching is used to send a handover request message to the mobile switching center to complete the service change process; the media gateway is configured to manage the TC resource and the IWF under the control of the mobile switching center. Resources.
  • the IWF service can be implemented, thereby saving system resource. Therefore, it is suitable to implement the transmission circuit type data service in the IP core network and the IP code division multiple access system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Méthode pour commuter un service vocal en un service IWF en utilisant le système IP CN et IP CDMA comprenant les étapes selon lesquelles : un terminal mobile transmet un code de fonctionnalité de changement de service à MSC ; le MSC définit un message de requête de mise à jour de fournisseur en fonction du code de fonctionnalité de changement de service ; et transmet le message de requête de mise à jour de fournisseur à BSC ; et BSC transmet la requête de transfert au MSC en fonction du message de requête de mise à jour de fournisseur. Selon la présente invention, le passage du service vocal au service IWF est détecté par MSC et n’exige pas que le BSC configure le TC pour la détection, ce qui économise les ressources système.
PCT/CN2006/002987 2005-11-10 2006-11-08 Méthode pour commuter un service vocal en un service iwf WO2007054020A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510115886.5 2005-11-10
CNB2005101158865A CN100396117C (zh) 2005-11-10 2005-11-10 一种实现语音业务切换到电路型数据业务的方法

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WO2007054020A1 true WO2007054020A1 (fr) 2007-05-18

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CN101494885B (zh) * 2008-01-21 2011-11-30 中兴通讯股份有限公司 一种多承载共享的ambr切换控制方法
CN101478621B (zh) * 2009-01-24 2011-12-07 华为技术有限公司 加密语音呼叫的编解码协商的方法、通信系统及设备
CN111212052A (zh) * 2019-12-27 2020-05-29 视联动力信息技术股份有限公司 业务处理方法、装置、电子设备及存储介质

Citations (3)

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CN1235747A (zh) * 1996-09-06 1999-11-17 艾利森电话股份有限公司 用于通话中业务变更请求的局间信令
WO2001052566A1 (fr) * 2000-01-07 2001-07-19 Motorola Inc. Procede et appareil pour transmission de la voix a commutation de circuit simultanee et echange de donnees gprs
CN1538769A (zh) * 2003-04-16 2004-10-20 ��������ķ������ 移动电话系统

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US6377799B1 (en) * 1999-06-17 2002-04-23 Ericason Inc. Interworking function in an internet protocol (IP)-based radio telecommunications network
US20050232235A1 (en) * 2004-04-14 2005-10-20 Utstarcom, Incorporated Method and system for providing an interface between switching equipment and 2G wireless interworking function
CN100440992C (zh) * 2004-04-21 2008-12-03 华为技术有限公司 实现码分多址电路数据业务的系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1235747A (zh) * 1996-09-06 1999-11-17 艾利森电话股份有限公司 用于通话中业务变更请求的局间信令
WO2001052566A1 (fr) * 2000-01-07 2001-07-19 Motorola Inc. Procede et appareil pour transmission de la voix a commutation de circuit simultanee et echange de donnees gprs
CN1538769A (zh) * 2003-04-16 2004-10-20 ��������ķ������ 移动电话系统

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CN1848972A (zh) 2006-10-18

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