CN102160330B - Realize the method for videoconference - Google Patents

Realize the method for videoconference Download PDF

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Publication number
CN102160330B
CN102160330B CN200980136603.1A CN200980136603A CN102160330B CN 102160330 B CN102160330 B CN 102160330B CN 200980136603 A CN200980136603 A CN 200980136603A CN 102160330 B CN102160330 B CN 102160330B
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CN
China
Prior art keywords
described
videoconference
message
ue
subscriber equipment
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CN200980136603.1A
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Chinese (zh)
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CN102160330A (en
Inventor
肖钰
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上海贝尔股份有限公司
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Priority to PCT/CN2009/072521 priority Critical patent/WO2011000145A1/en
Publication of CN102160330A publication Critical patent/CN102160330A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/10Signalling, control or architecture
    • H04L65/1066Session control
    • H04L65/1083In-session procedures
    • H04L65/1086In-session procedures session scope modification
    • H04L65/1093In-session procedures session scope modification by adding or removing participants
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/40Services or applications
    • H04L65/403Arrangements for multiparty communication, e.g. conference

Abstract

The invention provides the method that realizes videoconference in communication network, what the method was included in that application server sends to the participant of videoconference adds special identification information for setting up the message of videoconference. Make the participant of each videoconference can identify the purposes of this message by this special identification information, and the conference status of himself can be recorded, so just can make the participant of videoconference can not set up again another new videoconference before a videoconference does not stop, effectively prevent the generation of meeting chain.

Description

Realize the method for videoconference

Technical field

The present invention relates to carry out the method for videoconference, relate in particular to based on Session Initiation Protocol and carry out phoneThe method of meeting.

Background technology

In the evolution to next generation network (NGN) by PSTN (PSTN)Cheng Zhong, telecommunications and the Internet converged services and high-level network protocol (TISPAN) standard TS180043 has described by the message of dialogue-based initiation protocol (SIP) and has set up the method for calling. ?In all supplementary services, videoconference, i.e. three party service, is also undertaken by sip message.In tight coupling, define the user's of request convention business state. User and two remote partiesSet up two dialogues, then by application server request convention business. For this user, (meeting is sent outPlay person) provide the application server of service that this meeting and participant's session log is got off.

For convention business, IP Multimedia System (IMS) structure should be avoided meetingView chain, the participant of teleconference should not be allowed to set up with existing meeting its other party in additionAnother meeting.

At present, a kind of solution to the problems described above that is used for is: application server is recorded phone meetingThe dialogue of view between participant, and also do not stopping original videoconference as these participantsSituation under in the time proposing the request of new videoconference, refuse this request. Fig. 1 shows a kind of logicalThe topological structure of communication network, this network comprise four user equipment (UE)-A, UE-B, UE-C,UE-D, application server AS and a Multimedia Resource Function entity (MRF) MRF,Wherein, described four subscriber equipmenies are administered by AS, between each subscriber equipment, can not directly lead toLetter and must be by AS, MRF under the control of AS for subscriber equipment provides meeting bridge and putsThe media processing such as sound, audio mixing function. Suppose that UE-A has successfully initiated and UE-B by ASWith tripartite's videoconference of UE-C, in the case according to Session Initiation Protocol, AS know UE-A,UE-B, UE-C are in a videoconference, but UE-B, UE-C have not known themIn a videoconference. If at this moment UE-B wants to initiate one and UE-A and UE-DBetween videoconference, UE-B must initiate this videoconference by AS, but due toAS knows that UE-B is in a videoconference, thereby AS can refuse, and UE-B proposesSet up the request of the videoconference between UE-A, UE-B and UE-D, thereby avoid meeting chainProduce.

The method is applicable to user equipment (UE)-A, UE-B, UE-C preferably by identical applicationThe situation of server A S administration. But when UE-B or UE-C due to a variety of causes (for exampleUE-B or UE-C and AS wide apart) and during by the administration of other application servers, mayCan cause the generation of meeting chain. Fig. 2 shows the topological structure of another kind of communication network. At this netNetwork comprises first user equipment UE-A, the second user equipment (UE)-B, the 4th subscriber equipmentUE-C, three user equipment (UE)-D, the first application server AS-A, the second application serverAS-B, the first Multimedia Resource Function entity MRF-A and the second Multimedia Resource Function entityMRF-B, wherein, UE-A, UE-C and MRF-A are managed by AS-A, and UE-B, UE-DManaged by AS-B with MRF-B, if therefore UE-A will get in touch with UE-B, must be firstBy AS-A, then communicated by letter with AS-B by AS-A, last AS-B communicates by letter with UE-B again,Vice versa. Suppose that UE-A wants to set up tripartite by AS-A and AS-B and UE-B and UE-CVideoconference, in the case, according to Session Initiation Protocol, in the time setting up videoconference, AS-A sends outOnly be used to indicate UE-B to the message of AS-B and be connected to MRF-A to converse, thereby causeAfter having set up this tripartite's videoconference, AS-B and UE-B also do not know that UE-B is in oneIn the call of individual videoconference. Now, if UE-B wants initiation and UE-A and UE-D'sTripartite's videoconference, AS-B can not refuse this request, and is setting up this new videoconferenceTime, the message that AS-B issues AS-A is only used to indicate UE-A and is connected to MRF-B to lead toWords, therefore successfully tripartite's videoconference of initiation and UE-A and UE-D of UE-B, makesObtain UE-D and joined in the meeting of UE-A, UE-B and UE-C, this has just produced above-mentionedMeeting chain problem.

Therefore, need a kind of method effectively solve when in communication network, exist two or two withWhen upper application server, how effectively to avoid meeting chain problem.

Summary of the invention

The present invention is directed to the shortcoming in background technology, a kind of phone of realizing in telephone network is providedThe technical scheme of meeting, by send to the participant of videoconference at application server for buildingIn the message of vertical videoconference, add the method for identification information clearly to inform the participation of videoconferenceThis message of person is the message for setting up videoconference.

According to a first aspect of the invention, provide a kind of the first application server at communication networkThe middle method that realizes videoconference, the method comprises the following steps: a. receives from the of its administrationOne subscriber equipment for asking to initiate the first message of videoconference; B. according to described the first messageGenerate the second message for setting up described videoconference, this second message comprises identification information, shouldIt is the message for setting up videoconference that identification information is used to indicate this second message; C. described in inciting somebody to actionThe second message sends in the second application server and/or described the first message and specifies and participate in described electricityOther subscriber equipmenies words meeting, that administered by described the first application server, to set up described electricityWords meeting

According to a second aspect of the invention, provide a kind of the second application server at communication networkThe middle method that realizes videoconference, the method comprises the following steps: A. receives from the first applicationServer for setting up the second message of videoconference, this second message comprises identification information, shouldIt is the message for setting up videoconference that identification information is used to indicate described the second message; B. by instituteStating the second message is transmitted to that this second message is specified and is administered by described the second application serverThe second subscriber equipment.

Preferably, in described the second application server, there is the meeting shape of the subscriber equipment of its administrationState; Described method is further comprising the steps of before described step B: refer to according to described the second messageThe conference status of the second subscriber equipment fixed and that administered by described the second application server, judgementWhether this second subscriber equipment is in a videoconference; Described step B also comprises followingStep: if described the second subscriber equipment is in a videoconference, described in refusal is set upVideoconference.

Preferably, described method is further comprising the steps of: receive the second user who administers from itEquipment for asking to initiate the 5th message of another videoconference; According to described the second subscriber equipmentConference status, judge that described the second subscriber equipment is whether in a videoconference; AsDescribed the second subscriber equipment of fruit, in a videoconference, is refused described another phone meetingView.

According to a third aspect of the invention we, provide a kind of realizes in the subscriber equipment of communication networkThe method of videoconference, wherein, has the conference status of this subscriber equipment in described subscriber equipment,Said method comprising the steps of: i. receive from the application server under this equipment, forSet up the second message of videoconference, wherein, in this second message, comprise identification information, this markIt is the message for setting up videoconference that information is used to indicate described the second message; Ii. described in setting upVideoconference, and after setting up described videoconference, the conference status of this subscriber equipment is changedFor in a videoconference.

Preferably, described method is further comprising the steps of: set up another electricity in this user equipment requestsBefore words meeting, according to the conference status of this subscriber equipment, judge this subscriber equipment whether inIn a videoconference; If in a videoconference, refusal is set up this another phoneMeeting.

Due to the present invention send to the participant of videoconference at application server for setting up electricityIn the message of words meeting, add special identification information, thereby made the participation of each videoconferencePerson can identify the purposes of this message, and whether the conference status of himself (can be locatedIn a videoconference) record, so just can make the participant of videoconference at an electricityBefore words meeting does not stop, can not set up again another new videoconference, effectively prevent meetingThe generation of view chain.

Brief description of the drawings

By reading the description to non-limiting embodiment below in conjunction with accompanying drawing, other orders of the present invention, feature and advantage will become more apparent and give prominence to.

Fig. 1 shows a kind of topological structure schematic diagram of communication network;

Fig. 2 shows the topological structure schematic diagram of another kind of communication network;

Fig. 3 (a) and Fig. 3 (b) show the phone of setting up according to an embodiment of the inventionThe flow chart of meeting;

Fig. 4 (a) and Fig. 4 (b) show according to an embodiment of the invention preventingThe flow chart of meeting chain;

Fig. 5 (a) and Fig. 5 (b) show termination telephone according to an embodiment of the inventionThe flow chart of meeting;

In the accompanying drawings, same or analogous Reference numeral represents same or analogous method step.

Specific embodiment

Before describing the present invention in detail, first briefly introduce disappearing based on Session Initiation ProtocolBreath. Session Initiation Protocol is the signaling control protocol of an application layer, and it is for creating, revising and releasePut one or more participants' session. These sessions can be Internet multimedia conferencing,IP phone or multimedia delivery. The participant of session can pass through multicast (multicast), netShape clean culture (unicast) or both mixtures communicate. Sip message is for session connectionFoundation and amendment. Sip message is divided into request (REQUEST) and response (RESPONSE)Two class message, request message has 6 fundamental types, comprising: INVITE (making a call),ACK (giving a response replying), BYE (remove connect), CANCLE (midway cancelling),OPTIONS (inquiry the other side's ability), REGISTER (registration), the formulation of Session Initiation ProtocolPerson is also defining new type as required. Response message has Multi-encoding, and instruction session connectsThe concrete response that recipient makes. Form and other particular contents about sip message can be joinedExamine relevant criterion, repeat no more in this manual.

In order to illustrate according to of the present invention for realizing the method for videoconference, below all with Fig. 2Shown communication network is that example is set forth. It will be understood by those of skill in the art that thisBright can be for realizing the phone based on Session Initiation Protocol in the communication network of what IMS framework in officeMeeting.

Below first describe in detail according to this with reference to Fig. 2 and in conjunction with Fig. 3 (a) and Fig. 3 (b)The step of setting up videoconference of invention.

Fig. 3 (a) and Fig. 3 (b) show foundation electricity according to an embodiment of the inventionThe flow chart of words meeting. In this embodiment, first user equipment UE-A is initiated one and theTripartite's videoconference of two user equipment (UE)s-B and four user equipment (UE)-C. Need explanation, for explaining concisely object of the present invention, in Fig. 3 (a) and Fig. 3 (b) onlyShow the method step relevant to implementing the present invention, also set up the process of a videoconferenceComprise other steps that do not illustrate in the drawings, for example, before step S1, also comprise that UE-A exhalesCry the step of call of UE-B and maintenance and UE-B and UE-A call out UE-C andThe step of the call of maintenance and UE-C. Below by Fig. 3 (a) and Fig. 3 (b), in detailIllustrate that UE-A and UE-B and UE-C set up the detailed process of videoconference.

Before step S1, UE-A has successfully called out UE-B and UE-C and guarantorHeld and the call of UE-E and UE-B, process is afterwards mainly to distribute the first multimedia moneyMeeting bridge on the functional entity MRF-A of source and the tripartite of participant is connected to this meeting bridgeUpper, thus realize tripartite talks.

In step S1, first user equipment UE-A is to the first application server under itAS-A sends the first message for asking to initiate videoconference, i.e. an INVITE.The invitee who comprises session identification (Call-ID) D3, videoconference in this first message (UE-B and UE-C, wherein the session identification of the session between UE-A and UE-B be D1 andThe session identification of the session between UE-A and UE-C is D2), the destination address RURI of meetingEtc. information and the message body based on SDP (Session Description Protocol) form, wherein SDP messageBody is for being described the media characteristic of the session that will set up. For example message shown in the figureIn SDPA represent feature (the IP address of for example UE-A, port information, the sound of UE-AFrequently (for example a=sendrecv in figure, it represents that UE-A can send out in coded system, transmission directionSend message also can accept message) etc.).

In step S2, the first application server AS-A is receiving from described first of UE-AAfter message, send an INVITE to the first Multimedia Resource Function entity MRF-A of its administrationMessage, to set up session M3 and to distribute the meeting bridge on MRF-A with MRF-A.

In step S3, MRF-A returns to the successful 200OK response of session M3 to AS-AMessage.

In step S4, AS-A sends the ACK confirmation message about session M3 to MRF-A,To show that it has successfully received the 200OK response message that MRF-A sends in step S3.

Step S5 to S14 is for being connected to meeting bridge by UE-B.

Particularly, in step S5, AS-A sends an INVITE to MRF-A,To set up session M4 and to distribute the meeting bridge on MRF-A with MRF-A.

In step S6, MRF-A returns to the successful 200OK response of session M4 to AS-AMessage.

In step S7, AS-A generates and sends and be used for building to the second application server AS-BThe second message of vertical videoconference, re-INVITE message (according to the definition of Session Initiation Protocol,Re-INVITE message is that either party wants to revise current ginseng when calling and called both sides are after built vertical callingThe message using when number). The contacting identifiers head (Contact-IDheader) of this second messageFor: Contact:Adomain; Isfocus, wherein Adomain is UE-A in session D1Contacting identifiers, isfocus is the label adding according to the present invention, it is determined by RFC4579 standardJustice, it is for setting up disappearing of videoconference that this label is used to indicate this second message in the present inventionBreath.

It should be noted that, embodiments of the present invention are not limited to above-mentioned label isfocus be addedEnter to the specific implementations in re-INVITE message. Alternately, can not adopt above-mentioned markSign isfocus, and adopt other in this re-INVITE message, to add the mode of special mark informationReaching this message of instruction is the object of the message for setting up videoconference, for example, existIn re-INVITE message, add special header (header) or add XML body (XMLBody) etc.

It should be noted in the discussion above that a difference part in the present invention and background technology is: in backgroundIn technology, the invitee of videoconference (comprising subscriber equipment and/or the application server under it)Cannot know that it will be in a videoconference; And in the present invention, due to being subject to of videoconferencePerson's of inviting (comprising subscriber equipment and/or the application server under it) is contained mark described in receivingAfter the re-INVITE message of knowledge information, can know that it will be in a videoconference, thus energyEnough record the conference status of himself, now, when subscriber equipment self wants to set up new phone meetingWhile discussing or receive the new videoconference of other subscriber equipmenies initiations, subscriber equipment and/or its instituteThe application server belonging to just can judge whether to allow to build according to the conference status of this subscriber equipmentVertical this new videoconference, so just can avoid the generation of meeting chain.

In step S8, AS-B is receiving second disappearing of being sent in step S7 by AS-AAfter breath, be transmitted to the second user equipment (UE)-B of its administration.

Preferably, AS-B is before being transmitted to UE-B by this second message, first according to being stored inThe conference status about UE-B in AS-B judges that whether UE-B is in a phone meetingIn view. If UE-B is in a videoconference, refusal foundation is initiated by UE-AVideoconference. If UE-B not yet, in any videoconference, allows to set up by UE-AThe videoconference of initiating, and described the second message is transmitted to UE-B. The benefit of doing is like this,Can whether can accept one with regard to the subscriber equipment of directly judging its administration at application server endThe invitation of individual videoconference, thus operating efficiency improved.

In step S9, UE-B after receiving described the second message being forwarded by AS-B,Return to the successful 200OK response message of session to AS-B.

In step S10, the 200OK that AS-B is receiving UE-B and sends in step S9After response message, be transmitted to AS-A.

In step S11, AS-A sends about the ACK of session M4 and confirms to disappear to MRF-ABreath.

In step S12, AS-A sends the ACK confirmation message about session D1 to AS-B.

In step S13, AS-B forwards the ACK confirmation message from AS-A to UE-B.

In step S14, UE-B has been connected on the meeting bridge of MRF-A.

Step S15 to S21 is for being connected to meeting bridge by UE-C.

Particularly, in step S15, AS-A sends an INVITE to MRF-A,To set up session M5 and to distribute the meeting bridge on MRF-A with MRF-A.

In step S16, MRF-A returns to the successful 200OK of session M5 to AS-A and ringsAnswer message.

In step S17, AS-A generates and sends and be used for building to four user equipment (UE)-CSecond message that comprises identification information of vertical videoconference, sends out to invite UE-C to add by UE-AThe tripartite's videoconference rising, wherein, it is for setting up electricity that identification information is used to indicate this second messageThe message of words meeting.

In step S18, UE-C returns to AS-A after the second message receiving from AS-AReturn the successful 200OK response message of session.

In step S19, AS-A sends about the ACK of session M5 and confirms to disappear to MRF-ABreath.

In step S20, AS-A sends the ACK confirmation message about session D2 to UE-C.

In step S21, UE-C has been connected on the meeting bridge of MRF-A.

Step S22 to step S29 be used for stopping to session D1 and D2 keep declaring and start intoRow videoconference.

Particularly, in step S22, AS-A returns to the successful 200OK of session D3 to UE-AResponse message, it is for showing to UE-A, and UE-B and UE-C have been connected to MRF-AMeeting bridge on.

In step S23, AS-A sends the BYE message of removing session connection to MRF-A,It is keeping the maintenance that the process of session is set up to declare for cancelling before step S1 with UE-BAccuse.

In step S24, MRF-A returns to cancel to AS-A and keeps the successful 200OK of declarationBYE response message.

In step S25, AS-A sends the BYE message of removing session connection to MRF-A,It is keeping the maintenance that the process of session is set up to declare for cancelling before step S1 with UE-CAccuse.

In step S26, MRF-A returns to cancel to AS-A and keeps the successful 200OK of declarationBYE response message.

In step S27, UE-A sends the ACK confirmation message about session D3 to AS-A,To show that to AS-A UE-A has known that UE-B and UE-C have been connected to MRF-A'sOn meeting bridge.

In step S28, UE-A has been connected on the meeting bridge of MRF-A.

In step S29, UE-A, UE-B and UE-C start to carry out tripartite's videoconference,Now, AS-A and AS-B are by the meeting about UE-A, UE-B and UE-C of its recordState changes in a videoconference, and UE-A, UE-B and UE-C are alsoThe conference status of oneself is changed in a videoconference.

Foundation initiation and tripartite's videoconference UE-B and UE-C to UE-A aboveJourney describes in detail. Say in detail referring to Fig. 2 and in conjunction with Fig. 4 (a) and Fig. 4 (b)How bright the present invention suppresses the generation of meeting chain.

Fig. 4 (a) and Fig. 4 (b) show according to an embodiment of the invention preventingThe flow chart of meeting chain. In this embodiment, UE-A, UE-B and UE-C are in an electricityIn words meeting, now UE-B want to initiate one with the videoconference of UE-D and UE-A. ByThe subscriber equipment outside existing meeting in UE-D, once this videoconference be established, soWill produce meeting chain problem, therefore must refuse the foundation of this videoconference. In addition need,Bright, for simple and clear object, in Fig. 4 (a) and Fig. 4 (b), only show and realityExecute the method step that the present invention is relevant.

At step S30, to step S32, UE-A, UE-B and UE-C have all been connected to MRF-AMeeting bridge on.

In order to set up and the videoconference of UE-A and UE-D, first UE-B will maintain and UE-ACall, and then call out UE-D and maintain and the call of UE-D, finally again by themBe connected on MRF-B and could set up this videoconference.

Step S33 to S50 is used for keeping session D1.

Particularly, in step S33, UE-B sends one about session D1's to AS-BRe-INVITE message, it is for keeping the call between UE-B and UE-A.

In step S34, the re-INVITE message from UE-B is transmitted to AS-A by AS-B.

In step S35, because UE-A and UE-B have been connected to the meeting bridge of MRF-AUpper, thereby AS-A does not turn the re-INVITE message being sent by AS-B in step S34Issue UE-A, but separately send out the re-INVITE message about session M4 to MRF-A.

In step S36, MRF-A returns to the successful 200OK response message of session to AS-A.

In step S37, AS-A returns and keeps successful 200OK response message to UE-B.

In step S38, UE-B sends the ACK confirmation message about session D1 to AS-B.

In step S39, the ACK confirmation message from UE-B is transmitted to AS-A by AS-B.

In step S40, AS-A sends about the ACK of session M4 and confirms to disappear to MRF-ABreath.

In step S41, AS-B to MRF-B send an INVITE, forMRF-B sets up session M6.

In step S42, MRF-B returns to the successful 200OK response message of session to AS-B.

In step S43, AS-B sends a re-INVITE about session D1 to AS-AMessage, for setting up the maintenance declaration to UE-A.

In step S44, because UE-A and UE-B have been connected to the meeting bridge of MRF-AUpper, thereby AS-A does not turn the re-INVITE message being sent by AS-B in step S43Issue UE-A, but separately send out the re-INVITE message about session M4 to MRF-A.

In step S45, MRF-A returns to the 200OK response about session M4 to AS-AMessage.

In step S46, AS-A returns about the 200OK response of session D1 and disappears to AS-BBreath.

In step S47, AS-B sends about the ACK of session M6 and confirms to disappear to MRF-BBreath.

In step S48, AS-B sends the ACK confirmation message about session D1 to AS-A.

In step S49, AS-B sends the ACK confirmation message about session D1 to UE-B.

In step S50, about session D1 (MRF-B sends MRF-B to MRF-ASession between UE-A and UE-B) maintenance declaration.

Step S51 to S59 is for setting up the session between UE-B and UE-D.

Particularly, in step S51, UE-B sends the INVITE that calls out UE-D to AS-BMessage, wherein, the session identification of the session between UE-B and UE-D is D4.

In step S52, the INVITE from UE-B is transmitted to UE-D by AS-B.

In step S53, UE-D sends 180Ring ALERTING message to AS-B.

In step S54,180Ring ALERTING message is transmitted to UE-B by AS-B.

In step S55, UE-D returns about the 200OK response of session D4 and disappears to AS-BBreath.

In step S56, AS-B is transmitted to the 200OK response message about session D4UE-B。

In step S57, UE-B sends the ACK confirmation message about session D4 to AS-B.

In step S58, the ACK confirmation message about session D4 is transmitted to UE-D by AS-B.

In step S59, the session D4 of UE-B and UE-D is successfully established.

Next, UE-B wants the videoconference of foundation and UE-A and UE-D. In the present inventionIn, in the time that subscriber equipment knows that it has added a videoconference, do not move back at this subscriber equipmentBefore going out original videoconference, a new videoconference of its initiation will be refused. At the present embodimentIn, because UE-A, UE-B, UE-C are in a videoconference, thereby UE-B existsCheck after the conference status of himself, no longer the videoconference of initiation and UE-A and UE-D.In addition,, according to the present invention, the second application server AS-B of administration UE-B can know equallyThe conference status of UE-B, though therefore in the present embodiment UE-B sent mistakenly initiate electricityThe request of words meeting, AS-B also can be stoped effectively. Below AS-B refusal being set up shouldThe process of videoconference is described.

First, in step S60 to S69, UE-B pair keeps with the session of UE-D,This process is similar with keep-process above, therefore repeat no more.

In step S70, UE-B sends request and initiates the 4th of another videoconference to AS-BMessage, i.e. an INVITE. Comprise mark D5, the electricity of session in this first message(be UE-A and UE-D, wherein the session identification of UE-A and UE-B is the invitee of words meetingThe session identification of D1 and UE-B and UE-D is D4), the destination address RURI of meeting etc.Information.

In step S71, AS-B is in the time receiving the 4th message, according to being stored in AS-BThe conference status about UE-B, determine that UE-B is in a videoconference, therefore refusesAbsolutely this request, and to UE-B return messages 3xx or 4xx or 5xx or 6xx to show to UE-BThe bright request that it sets up videoconference has been rejected, and wherein xx represents it can is fixed in Session Initiation ProtocolAny conditional code of justice.

In step S72, UE-B sends an INVITE to AS-B, for askingAsk meeting to initiate failed declaration.

In step S73, AS-B sends an INVITE to MRF-B, forSet up session M8.

In step S74, MRF-B returns about the 200OK of session M8 and rings to AS-BAnswer message.

In step S75, AS-B sends 183 session progress response messages to UE-B.

In step S76, AS-B sends about the ACK of session M8 and confirms to MRF-BMessage.

In step S77, AS-B is not established to UE-B declaration videoconference.

Above how the present invention is prevented to the generation of meeting chain describes in detail. According to this realityExecute routine a kind of modification, when user equipment (UE)-A, UE-B and UE-C are in an electricityIn words meeting and three user equipment (UE)-D not in any videoconference time, UE-DWant the videoconference of foundation and UE-A and UE-B. Now, UE-D sends to AS-BFor asking to set up the 5th message of another videoconference. AS-B is receiving after the 5th messageAccording to the conference status of UE-D, learn that UE-D is not in any videoconference. In this situationUnder, in the further participant who judges the videoconference of being initiated by UE-D of AS-B, whether exist sameSample is by other subscriber equipmenies of its administration, and in the present embodiment, UE-B is exactly that such user establishesStandby; Then AS-B finds that UE-B is in a videoconference after inspection, thereby refusalThe videoconference of being initiated by UE-D. The advantage of doing is like this, AS-B can receive byThis request is directly refused in the request of setting up videoconference that UE-D sends afterwards, thereby has avoided and itHis application server or other subscriber equipmenies are just refused after transmitting repeatedly message, have improved workMake efficiency.

Set up with regard to how to cancel referring to Fig. 2 and in conjunction with Fig. 5 (a) and Fig. 5 (b)The step of videoconference is described in detail.

Fig. 5 (a) and Fig. 5 (b) show termination telephone according to an embodiment of the inventionThe flow chart of meeting. In this embodiment, user equipment (UE)-A, UE-B and UE-C inIn a videoconference, first user equipment UE-A is the promoter of this videoconference, and it is presentWant to stop this videoconference, and the call of maintenance and UE-B, and converse with UE-C.It should be noted that, for simple and clear object, in Fig. 5 (a) and Fig. 5 (b), only showThe method step relevant to implementing the present invention.

Step S78 to S83 is used for making meeting bridge quiet.

Particularly, in step S78, UE-A sends one about session D3 to AS-AThe re-INVITE message of (being the videoconference between UE-A, UE-B and UE-C), itsBe used to indicate meeting bridge quiet.

In step S79, AS-A is transmitted to the re-INVITE message from UE-AMRF-A。

In step S80, MRF-A returns to 200OKINVITE response message to AS-A,Quiet to show meeting bridge.

In step S81, AS-A disappears the 200OKINVITE response from MRF-ABreath is transmitted to UE-A.

In step S82, UE-A sends ACK confirmation message to AS-A, to show itReceive above-mentioned 200OKINVITE response message.

In step S83, this ACK confirmation message is transmitted to MRF-A by AS-A.

Step S84 to S101 is for termination telephone meeting and keep UE-A and the meeting of UE-BWords D1.

Particularly, in step S84, UE-A sends for termination telephone meeting to AS-AThe 3rd message, i.e. a re-INVITE message. By the 3rd message and mentioned aboveCompare for the second message of setting up videoconference, can find in the 3rd message notThere is label isfocus. That is to say, for set up the second message of videoconference with forThe difference of the 3rd message of termination telephone meeting is mainly, for termination telephone meetingThe 3rd message in without identification information mentioned above, thereby make subscriber equipment and/orApplication server can know that this subscriber equipment will exit one receiving after the 3rd messageExisting videoconference, thus its conference status is changed to not in any videoconference,So just can initiate or accept videoconference that another is new.

In step S85, above-mentioned the 3rd message is transmitted to AS-B by AS-A.

In step S86, above-mentioned the 3rd message is transmitted to UE-B by AS-B.

In step S87, UE-B returns to 200OK response message to AS-B.

In step S88, AS-B forwards from the 200OK response of UE-B and disappears to AS-ABreath.

In step S89, this 200OK response message is transmitted to UE-A by AS-A.

In step S90, UE-A sends ACK confirmation message to AS-A.

In step S91, AS-A forwards this ACK confirmation message to AS-B.

In step S92, AS-B forwards this ACK confirmation message and by UE-B to UE-BConference status change to not in any videoconference. UE-B is receiving this ACKAfter confirmation message, also the conference status of oneself is changed to not in any videoconference.

In step S93, AS-A sends and discharges disappearing of meeting bridge connection resource to MRF-ABreath BYE.

In step S94, MRF-A returns to 200OKBYE response message to AS-A.

In step S95 to S101, be the process that produces the maintenance declaration to session D1, byKeep the process of declaration similar in this process and previously described generation, therefore repeat no more.

Step S102 to S110 for termination telephone meeting and make UE-A and UE-C in logicalSpeech phase.

Particularly, in step S102, UE-A sends for termination telephone meeting to AS-AThe 3rd message of view.

In step S103, AS-A sends and discharges meeting bridge connection resource to MRF-ABYE message.

In step S104, MRF-A returns to 200OKBYE response message to AS-A.

In step S105, AS-A forwards and is sent out by UE-A in step S102 to UE-CThe 3rd message of sending.

In step S106, UE-C returns to 200OK response message to AS-A.

In step S107, AS-A forwards this 200OK response message to UE-A.

In step S108, UE-A sends ACK confirmation message to AS-A.

In step S109, this ACK confirmation message is transmitted to UE-C by AS-A. Like this,Just can be by the conference status of himself more after UE-C receives this ACK confirmation messageChange into not in any videoconference.

In step S110, UE-A and UE-C converse.

In step S111, UE-A sends the BYE message of cancelling session D3 to AS-A.

In step S112, AS-A sends to MRF-A the BYE that cancels session M3 and disappearsBreath.

In step S113, MRF-A returns to the BYE to cancelling session M3 to AS-AThe 200OKBYE response message of message.

In step S114, the BYE that AS-A returns cancelling session D3 to UE-A disappearsThe 200OKBYE response message of breath. Receiving this 200OKBYE response at UE-A disappearsAfter breath, UE-A changes its conference status for not in any videoconference.

Above an embodiment of UE-A termination telephone meeting is had been described in detail. RootAccording to a modification of the present embodiment, for termination telephone meeting, UE-A can be for example in stepIn S84, directly send a BYE message to AS-A, consequently not only videoconference is wholeStop and interrupted and the session of UE-B and UE-C. In addition carry out in videoconference,Time, UE-B or UE-C also can exit videoconference, and for example it is to AS-A or AS-BSend a BYE message, after receiving the confirmation message of AS-A or AS-B, just canTo change the conference status of oneself, thereby can initiate or add another videoconference.

Above the specific embodiment of the present invention is described. It should be noted that, thisInvention is not limited to above-mentioned specific implementations, and those skilled in the art can be in appended powerIn the scope that profit requires, make various modification or amendment.

Claims (13)

1. in the first application server of communication network, realize a method for videoconference, its spyLevy and be, the method comprises the following steps:
A. receive from the first user equipment of its administration for asking to initiate of videoconferenceOne message;
B. according to described the first message generation for setting up the second message of described videoconference, this is the years oldTwo message comprise identification information, and it is for setting up phone that this identification information is used to indicate this second messageThe message of meeting;
C. described the second message is sent to the second application server, to set up described videoconference,Wherein, described the second message is used for described the second application server after described videoconference is set upThe meeting shape of the second subscriber equipment of this second application server administration that this second message is specifiedState changes in a videoconference;
Wherein, the conference status of described the second subscriber equipment is for described the second application server judgementWhether allow described the second subscriber equipment to set up new videoconference, so that described the second user is establishedFor can not set up again another new videoconference before described videoconference does not stop, thus anti-The only generation of meeting chain.
2. method according to claim 1, is characterized in that, described method also comprises followingStep:
-described the first application server receive from described first user equipment for endOnly, after the 3rd message of videoconference, the 3rd message is transmitted to described the second application serviceDevice, wherein, described the 3rd message stops in described videoconference for described the second application serverAfterwards the conference status of described the second subscriber equipment is changed to not yet in any videoconference.
3. method according to claim 1, is characterized in that, described videoconference be based onThe videoconference of Session initiation Protocol, described the second message is the invitation defining in Session initiation ProtocolMessage (re-INVITE), additional in the contacting identifiers head of this invitation message (re-INVITE)One label (isfocus), this label (isfocus) is as described identification information.
4. in the second application server of communication network, realize a method for videoconference, itsBe characterised in that in described the second application server, there is the conference status of the subscriber equipment of its administration,The method comprises the following steps:
A. receive from the first application server for setting up the second message of videoconference, shouldThe second message comprises identification information, and it is for setting up that this identification information is used to indicate described the second messageThe message of videoconference;
B. that specify according to described the second message and by the of described the second application server administrationThe conference status of two subscriber equipmenies, judges that whether this second subscriber equipment is in a phone meetingIn view, wherein, the conference status of described the second subscriber equipment is sentenced for described the second application serverBreak and whether allow described the second subscriber equipment to set up new videoconference, to make described the second userEquipment can not be set up another new videoconference before described videoconference does not stop again, therebyPrevent the generation of meeting chain;
If C. described the second subscriber equipment is in a videoconference, refusal is set up instituteState videoconference;
If described the second subscriber equipment, not in any videoconference, allows to set up described electricityWords meeting, and described the second message is transmitted to described the second subscriber equipment;
Described method also comprises:
After described videoconference is set up, in described the second application server by described the second useThe conference status of family equipment changes in a videoconference.
5. method according to claim 4, is characterized in that, described method also comprises followingStep:
When described the second application server receive come since described the first application server, forWhen instruction stops the 3rd message of described videoconference, the 3rd message is transmitted to described the second useFamily equipment;
After described videoconference stops, the conference status of described the second subscriber equipment is changed toNot yet in any videoconference.
6. method according to claim 4, is characterized in that, described method also comprises followingStep:
Receive second subscriber equipment of administering from it for asking to initiate another videoconferenceThe 4th message;
According to the conference status of described the second subscriber equipment, whether to judge described the second subscriber equipmentThrough in a videoconference;
If described the second subscriber equipment in a videoconference, refusal described anotherVideoconference.
7. method according to claim 4, is characterized in that, described method also comprises followingStep:
Receive from the 3rd subscriber equipment of its administration for asking to initiate another videoconferenceThe 5th message;
According to the conference status of described the 3rd subscriber equipment, whether to judge described the 3rd subscriber equipmentThrough in a videoconference;
If described the 3rd subscriber equipment not yet, in a videoconference, further judges instituteState in the participant of another videoconference and whether exist equally and administered by described the second application serverOther subscriber equipmenies;
If existed, according to the conference status of described other subscriber equipmenies, described other use of judgementWhether family equipment is in a videoconference, if it is in a videoconference,Described another videoconference of refusal.
8. according to the method described in any one in claim 4-7, it is characterized in that described electricityWords meeting is the videoconference of dialogue-based initiation protocol, and described the second message is Session initiation ProtocolThe invitation message (re-INVITE) of middle definition, in the contact of this invitation message (re-INVITE)An additional label (isfocus) in marking head, this label (isfocus) is as described identification information.
9. a method that realizes videoconference in the subscriber equipment of communication network, its feature existsIn, in described subscriber equipment, there is the conference status of this subscriber equipment, the method comprises the following steps:
I. receive from the application server under this equipment, for setting up second of videoconferenceMessage, wherein, comprises identification information in this second message, and this identification information is used to indicate describedTwo message are the message for setting up videoconference;
Ii. set up described videoconference, and after setting up described videoconference, this user is establishedStandby conference status changes in a videoconference;
Wherein, the conference status of described subscriber equipment is for the application service under described subscriber equipmentDevice judges whether to allow described subscriber equipment to set up new videoconference, to make described subscriber equipmentBefore described videoconference does not stop, can not set up again another new videoconference, thereby preventThe generation of meeting chain.
10. method according to claim 9, is characterized in that, the method also comprises followingStep:
-when the instruction videoconference end receiving from the application server under this subscriber equipmentAfter the 3rd message only, stop described videoconference, and by the conference status change of this subscriber equipmentFor not in any videoconference.
11. methods according to claim 9, is characterized in that, the method also comprises followingStep:
-application server under this subscriber equipment sends the message that exits described videoconference;
-after videoconference stops, the conference status of this subscriber equipment is changed to not in appointingIn what videoconference.
12. methods according to claim 9, is characterized in that, described method also comprise withLower step:
-before the request message of another videoconference is set up in the transmission of this subscriber equipment, according to thisThe conference status of subscriber equipment, judges that this subscriber equipment is whether in a videoconference;
-if in a videoconference, refusal is set up this another videoconference.
13. according to the method described in any one in claim 9-12, it is characterized in that, described inVideoconference is the videoconference of dialogue-based initiation protocol, and described the second message is session setup associationThe invitation message (re-INVITE) defining in view, at the connection of this invitation (re-INVITE) messageBe in marking head, to have added label (isfocus), this label (isfocus) is as described mark letterBreath.
CN200980136603.1A 2009-06-30 2009-06-30 Realize the method for videoconference CN102160330B (en)

Priority Applications (1)

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Citations (1)

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