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WO2008131621A1 - Procédé de notification de service de conférence - Google Patents

Procédé de notification de service de conférence Download PDF

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Publication number
WO2008131621A1
WO2008131621A1 PCT/CN2007/003698 CN2007003698W WO2008131621A1 WO 2008131621 A1 WO2008131621 A1 WO 2008131621A1 CN 2007003698 W CN2007003698 W CN 2007003698W WO 2008131621 A1 WO2008131621 A1 WO 2008131621A1
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WO
WIPO (PCT)
Prior art keywords
conference
user
pstn
message
network
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2007/003698
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English (en)
Chinese (zh)
Inventor
Min Shen
Feng Gao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Publication of WO2008131621A1 publication Critical patent/WO2008131621A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences

Definitions

  • the present invention relates to the field of communications, and more particularly to a conference service P method in a Next Generation Network (NGN).
  • NTN Next Generation Network
  • IMS IP Multimedia Subsystem
  • SIP Initial Session Protocol
  • AS set application server
  • FIG. 1 is a block diagram showing an implementation architecture of a typical service in a next generation network, where an application server (AS) (there may be multiple, respectively for different services) service-call through the interface with the user's home network
  • AS application server
  • S-CSCF session control function
  • P-CSCF proxy-call session control function
  • S-CSCF service-call session control function
  • the user terminal A and the user terminal B exchange and negotiate the media parameters supported by the two parties, and establish an IP media stream connection (identified by a solid line) between the two, and the IP media stream is used for transmitting data such as a voice packet.
  • an IP media stream connection can also be established between the user terminal and the application server to implement a human-machine conversation service, such as an automatic voice service of 4 lines.
  • Next-generation networks need to consider interworking with traditional PSTN (Public Switched Telephone Network)/ISDN (Integrated Services Digital Network), including IMS intelligent terminals in NGN and terminals in PSTN/ISDN networks, and terminals in PSTN/ISDN networks.
  • the NGN terminal can use the services provided by the PSTN/ISDN network using the services provided by the NGN.
  • 2 is a block diagram showing an implementation architecture of interworking between NGN and PSTN/ISDN networks, wherein two functional entities are added between the NGN network and the PSTN/ISDN network: the Media Gateway (MGW) is responsible for IP media streams in the NGN. Converted to voice stream in PSTN/ISDN network, and reverse conversion; Media Gateway Control Function (MGCF) is responsible for converting SIP service messages in NGN into TUP (Telephone User Part) / ISUP in PSTN/ISDN network (integrated Business user part) Messages, as well as reverse conversion, and control the MGW. Some major SIP service messages are associated with TUP/ISUP service messages.
  • MGW Media Gateway
  • the INVITE message in SIP can correspond to IAM (initial address message) in TUP/ISUP, and BYE (on-hook) message in SIP can correspond to TUP.
  • REL release message
  • the 200 OK (response response) message in SIP (depending on the request message corresponding to it) can correspond to ANM (answer message) and RLC (in TUP/ISUP) Release the completion message).
  • 3 is a schematic flow diagram showing a process of establishing a call and releasing a IMS terminal of an NGN with a PSTN/ISDN terminal.
  • the P-CSCF, the S-CSCF of the NGN user are integrated with the AS, and the MGCF is integrated.
  • the method includes the following steps: Steps S301 to S302, the NGN user A sends an INVITE invitation request to the PSTN/ISDN user B. Step S303, the MGCF converts the request into an IAM message in the PSTN/ISDN, and sends the request to the user B.
  • the PSTN/ISDN switch is located; Step S304, after the user B 4 picks up the call, the PSTN/ISDN switch returns an ANM message to the MGCF; Steps S305 ⁇ S306, the MGCF converts it into a 200 OK (Response Response) message in the SIP, and sends To user A; and steps S307 ⁇ S308, user A sends an ACK (Invite Response Acknowledgement) message to the MGCF, which does not need to be converted to a message in the PSTN/ISDN.
  • An IP media stream is established between the VIGWs, and a voice stream is established between the MGW and the PSTN/ISDN switch.
  • the user A and the user B can make a call.
  • the user terminal A wants to hang up, it issues an on-hook request to the PSTN/ISDN switch, and then the PSTN/ISDN switch returns the on-hook response to the user terminal A (steps S309-S314).
  • 4 is a schematic flow diagram showing a conference service procedure in which a typical NGN IMS terminal and a PSTN/ISDN terminal participate together.
  • the network devices such as P-CSCF and S-CSCF are omitted in the figure, and the MGCF and the MGW are integrated, and the PSTN/ISDN terminal is not marked, which does not affect the description of the present invention.
  • the conference service server is located in the NGN and is used for all users. Provides conference service functions, and can establish a voice path with multiple users at the same time, and then mix and send to each user.
  • the method includes the following steps: Steps S401 to S406, the NGN user A first sends an invitation request (INVITE) to the conference service server, and creates a conference resource at the conference service server through a normal session establishment process.
  • INVITE invitation request
  • Step S407 establishing a call between the user A and the conference service server
  • Steps S408 - S409 if the NGN user A wants to invite the PSTN/ISDN user B to join the conference, the conference can be
  • the service server sends a conference invitation request, and the conference invitation request uses a REFER (indication) message in the SIP protocol, where the number of the PSTN/ISDN user B is provided
  • Steps S410 to S411 the conference service server returns an acceptance response, and adopts 202.
  • the conference service server sends an invite request (INVITE) to the PSTN/ISDN user B according to the REFER request, and is converted by the MGCF/MGW, and finally in the conference service server and the PSTN/ISDN user B. Establish a call between each other, so that user B joins the current meaning.
  • the NGN user A can also inform the PSTN/ISDN user C through various channels, and the user C dials the conference resource number by itself, that is, the following steps as shown in FIG.
  • Step S418, PSTN/ The ISDN user B establishes a call with the conference service server;
  • Step S419 the PSTN/ISDN switch sends an IAM request to the MGCF (the called number is the conference resource number);
  • Step S420 the MGCF converts the request into an INVITE request, and sends the request to the conference service server;
  • the conference service server returns a response message, indicating that the call request is accepted, and a call channel is also established between the conference service server and the PSTN/ISDN user C, so that the user C also joins the conference.
  • the user can exit the conference by releasing the call with the conference service server.
  • a conference may have a lot of users involved.
  • FIG. 5 is a schematic flow diagram of an NGN user subscription conference event. As shown in FIG.
  • Step S501 NGN user A successfully joins the conference; Steps S502 ⁇ S503, sending a SUBSCRIBE message to the service server, where the message destination is the conference resource number, Event The parameter is conference; steps S504 ⁇ S505, the conference service server returns a success response (200 OK); steps S506 ⁇ S508, when other users join or leave the conference, the service server sends a NOTIFY message to user A,
  • the message body contains information such as a user number, a user action (joining or exiting the conference), and steps S509 to S510, and the user A returns an acknowledgment response (200 OK) to confirm receipt of the notification message.
  • a PSTN/ISDN network when a user joins or leaves a conference, the conference system will actively send a notification message to the PSTN/ISDN user (using the CPG (Call Progress) message in the ISUP between the switches) without the user having to subscribe in advance.
  • CPG Call Progress
  • the NGN IMS terminal can obtain the notification information by subscribing to the mechanism of the event, and the PSTN/ISDN terminal does not actively subscribe to the conference event, then the conference server will not send to the PSTN/ISDN terminal.
  • the notification message is sent, so that the PSTN/ISDN terminal cannot obtain notification that other users join or leave the conference.
  • the NGN IMS terminal cannot adopt the mechanism for subscribing to conference events, and can only passively receive all notifications sent by the conference system. Therefore, there is an urgent need for an improved method to solve the problem that users in the network cannot subscribe to conference events using the subscription mechanism.
  • the present invention provides a conference service notification method for providing a conference event notification function for an NGN user or a PSTN/ISDN user across a network.
  • the conference service notification method of the present invention includes the following steps: after the PSTN/ISDN user establishes a call with the conference service server in the NGN, the MGCF sends a subscription request for the conference event to the conference service server on behalf of the PSTN/ISDN user; and the MGCF will come from the conference service.
  • the server's conference event notification message is translated into a call progress message in the PSTN/ISDN and sent to the PSTN/ISDN user.
  • the conference service notification method may further include the following processing: After receiving the subscription request, the conference service server returns a success response to the MGCF. While the MGCF converts the conference event notification message, it returns a confirmation message to the conference server to confirm receipt of the event notification message.
  • the MGCF determines whether the PSTN/ISDN user establishes a call with the conference service server by the following method: The MGCF detects a call setup process between the PSTN/ISDN user and the user in the NGN, and if the user in the NGN is found to be provided in the session establishment message
  • the contact address includes a preset attribute, and the user in the NGN is determined to be a conference service. Among them, the default attribute is "isfocus".
  • the source address of the subscription request is the number of the PSTN/ISDN user
  • the destination address of the subscription request is the conference resource number
  • the event parameter of the subscription request is the conference.
  • the conference event notification message includes a user number and user action information, where the user action information includes the user joining the conference action information and the user exiting the conference action information.
  • FIG. 1 is a block diagram showing an implementation architecture of a typical service in a next generation network
  • 2 is a block diagram showing an implementation architecture of interworking between NGN and PSTN/ISDN networks
  • FIG. 3 is a schematic flow diagram showing a process of establishing a call and release between an IMS terminal of an NGN and a PSTN/ISDN terminal;
  • FIG. 5 is a schematic flow diagram of a conference service event in which an NGN user subscribes to a conference in the prior art;
  • FIG. 6 is a flow diagram of a conference service notification method according to the present invention;
  • FIG. 7 is a schematic flow diagram of a process in which an NGN conference service server provides a conference event notification function for a PSTN/ISDN user according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention are described with reference to the accompanying drawings.
  • FIG. 6 is a flow chart of a conference service notification method in accordance with the present invention. As shown in FIG.
  • the method includes the following steps: Step S602: After a PSTN/ISDN user establishes a call with a conference service server in the NGN, the MGCF sends a subscription request for the conference event to the conference service server on behalf of the PSTN/ISDN user; S604.
  • the MGCF converts the conference event notification message from the conference service server into a call progress message in the PSTN/ISDN, and sends the call progress message to the PSTN/ISDN user.
  • the conference service notification method may further include the following processing: After receiving the subscription request, the conference server returns a success response to the MGCF. While the MGCF converts the conference event notification message, it returns an acknowledgement message to the conference server to confirm receipt of the conference event notification message.
  • the MGCF determines whether the PSTN/ISDN user establishes a call with the conference service server by the following method:
  • the MGCF detects the call establishment process of the PSTN/ISDN user and the user in the NGN, and if the user in the NGN is found to be in the contact address provided in the message establishment message Including the preset attribute, the user in the NGN is determined to be the conference service server.
  • the default attribute is isfocus (is the focus, the following is marked in English).
  • the source address of the subscription request is the number of the PSTN/ISDN user
  • the destination address of the subscription request is the conference resource number
  • the event parameter of the subscription request is the conference.
  • the event notification message includes a user number and user action information, where the user action information includes the user joining the conference action information and the user exiting the conference action information.
  • 7 is a schematic flow diagram of a process in which an NGN conference service server provides a conference event notification function to a PSTN/ISDN user according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps: Step S701: The PSTN/ISDN user establishes a call with the conference service server in the NGN. Step S702: The MGCF actively sends a subscription request for the conference event to the conference service server on behalf of the PSTN/ISDN user.
  • the source address of the SUBSCRIBE message is the number of the PSTN/ISDN user, the destination is the conference resource number, and the Event parameter is conference; in step S703, the conference service server returns a success response (200 OK); steps S704 ⁇ S705, when there are other When the user joins or leaves the conference, the conference service server sends a NOTIFY message to the MGCF, where the message body contains information such as the user number, user action (joining or leaving the conference), and the like; Step S706, the MGCF converts the notification message into the ISUP.
  • the CPG (Call ⁇ ) message is sent to the PSTN/ISDN switch; and in step S707, an acknowledgment response (200 OK) is returned to the conference service server, and the notification message is acknowledged.
  • the MGCF must determine that the PSTN/ISDN user has established a call with the conference service server before sending the conference event subscription message to the conference service server. If PSTN/ISDN The user establishes a call with a normal IMS terminal in the NGN, and the MGCF cannot send a conference event subscription message to the normal IMS terminal on behalf of the PSTN/ISDN user.
  • the MGCF can determine whether the PSTN/ISDN user has established a call with the conference service server.
  • the conference service server sends a message to the user (step S412 shown in FIG. 4).
  • step S420) will provide its own contact address (Contact parameter), this parameter will contain an isfocus attribute, indicating that it has the ability to talk to multiple users at the same time.
  • Contact parameter contact address
  • this parameter will contain an isfocus attribute, indicating that it has the ability to talk to multiple users at the same time.
  • two ordinary users establish a session they do not include the value of this attribute in the contact address parameters provided by each other.
  • the MGCF can use the above features to monitor the message establishment process of the PSTN/ISDN user and the NGN user, and determine whether the other party that establishes the call with the PSTN/ISDN user is the conference service server (the Contact parameter includes the isfocus attribute) or the common IMS terminal. (The Contact parameter does not contain the isfocus attribute).
  • the solution of the present invention can correctly provide the NGN user and the PSTN/ISDN user with the conference event notification function when the NGN user and the PSTN/ISDN user participate in the same conference, without changing the original usage habit of the user.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

procédé de notification de service de conférence, comme suit: après l'ouverture par un utilisateur RTPC/RNIS d'une session avec un serveur de service de conférence en NGN, envoi par MGCF de demande d'abonnement d'événement de conférence au serveur de service de conférence, et conversion par MGCF du message de notification d'événement de conférence en message CPG de RTPC/RNIS puis transmission à l'utilisateur de RTPC/RNIS. Le recours à ce procédé permet d'assurer correctement la fonction de notification d'événement lorsque l'utilisateur de NGN et l'utilisateur de RTPC/RNIS participent à la même conférence, ce qui ne modifie pas les anciennes habitudes de l'utilisateur.
PCT/CN2007/003698 2007-04-29 2007-12-20 Procédé de notification de service de conférence Ceased WO2008131621A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200710097445 CN101296276B (zh) 2007-04-29 2007-04-29 会议业务通知方法
CN200710097445.6 2007-04-29

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Publication Number Publication Date
WO2008131621A1 true WO2008131621A1 (fr) 2008-11-06

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CN104009958A (zh) * 2013-02-22 2014-08-27 中兴通讯股份有限公司 Ngn和ims间进行多媒体会议通知服务的方法及系统

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WO2006068391A1 (fr) * 2004-12-20 2006-06-29 Lg Electronics Inc. Systeme d'acces multidiffusion
CN1852081A (zh) * 2005-07-12 2006-10-25 华为技术有限公司 一种通过下一代网络实现多方会议的方法

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US6947724B2 (en) * 2002-01-04 2005-09-20 Telefonaktiebolaget Lm Ericsson (Publ) System and method of billing based on the reported traffic load in a telecommunications network

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Publication number Priority date Publication date Assignee Title
WO2006068391A1 (fr) * 2004-12-20 2006-06-29 Lg Electronics Inc. Systeme d'acces multidiffusion
CN1852081A (zh) * 2005-07-12 2006-10-25 华为技术有限公司 一种通过下一代网络实现多方会议的方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Session Initiation Protocol (SIP) Call Control - Conferencing for User Agents", RFC 4579, August 2006 (2006-08-01), XP015055014 *
"Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); PSTN/ISDN simulation services: Conference (CONF); Protocol specification", ETSI TS 183 005 V1.1.1, March 2006 (2006-03-01), XP014034000 *

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CN101296276B (zh) 2010-12-08
CN101296276A (zh) 2008-10-29

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