CN101106536B - A method for establishing group session - Google Patents
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- CN101106536B CN101106536B CN2006100616678A CN200610061667A CN101106536B CN 101106536 B CN101106536 B CN 101106536B CN 2006100616678 A CN2006100616678 A CN 2006100616678A CN 200610061667 A CN200610061667 A CN 200610061667A CN 101106536 B CN101106536 B CN 101106536B
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Abstract
The invention provides a method of establishing group conversation. The method includes: A. calling client side sends the message which can establish the second conversation in the first conversation to a server and the message carries the first conversation mark; B. the server obtains the group member list of the group conversation corresponding with the first conversation mark; C. the server sends out the request of establishing the second conversation to the group members and establishes the second conversation. The invention solves the problem of network resources waste caused by consistent occupation of the interfaces and network resources of a plurality of media in the same conversation in the prior art.
Description
Technical field:
The present invention relates to communication field, relate in particular to a kind of method of setting up cluster conversation.
Background technology:
A kind of half-duplex voice business by communicating by function key of PTT (Push to Talk) comprises a lot of implementations, at present such as the iDEN of Motorola and the Tetra of Nokia.PoC (PTT overCellular) is the PTT business that realizes on packet network of OMA (Open Mobile Alliance Open Mobile Alliance tissue) definition, adopt VoIP (packet voice) and semiduplex mode, low-cost, the high efficiency real time communication demand that satisfies PoC client (hereinafter to be referred as client).By this business, client can be initiated PoC session to single client or group, realizes one to one or the conversational mode of one-to-many.
In PoC session, server is divided into controlled function and participates in function server according to logic function.The controlled function server provides the PoC session centralized control, comprise RTP (Real-time TransportProtocol is hereinafter to be referred as RTP) distribution of media, right to speak control, the member who participates in session is carried out conversation strategy and handles the participation information about firms; Participate in function server session control is provided, comprise policy control, to the right to speak signaling relaying between controlled function server and the client etc., the relaying of Media Stream also can be provided as required the incoming call session; Storage user's business setting is as answer-mode, terminating call barred etc.
And Session Initiation Protocol is a kind of agreement that is used for setting up session, this protocol description the relevant requests of some sessions, as set up session, withdraw from conversation request etc.Session Description Protocol (Session Description Protocol is hereinafter to be referred as SDP) is used for session parameter is held consultation, as the medium type that transmits, the size of file, the coded format of employing, the big defeated port of employing etc.After setting up session, need come transmitting media flow data with certain protocol, as big file type, adopt MSRP (Message Session RelayProtocol, message session trunk protocol) that real-time voice flow, video flowing are generally adopted RTP.
According to user's use preference and environment for use etc., the callee supports two kinds of answer-modes: automatic-answering back device: enter session when being invited automatically; Reply by hand: eject acknowledgement window, the user determines the laggard session of going into.
These two kinds of answer-modes can be provided with in terminal, are defaulted as automatic-answering back device.If the PoC user who is invited has activated the automatic-answering back device setting, he is with the voice of energy uppick from other PoC session participant, and need not to carry out any operation, convenient for users to use like this, especially some occasion as situations such as driving, urgent calls under.
At present, the method for setting up cluster conversation has following several modes:
One, sets up cluster conversation according to predetermined upright group
Before initiation session, set up a group in advance, this group comprises a tabulation of the call object when setting up session.When initiation session, group identification on client is with in conversation request message, server are received after the group identification, set up cluster conversation to the request of group identification corresponding server, and other group member participant sessions in the invite group.
As shown in Figure 1, it is as follows to set up the flow process of cluster conversation according to pre-established group:
Step 101-102: the calls customer end sends the invitation message of setting up cluster conversation to the controlled function server.This message comprises
Group identification such as group@huawei.com
The controlled function server obtains the group member tabulation according to the cluster conversation sign from xml document management server (XDMS), gets the user then and send the message of setting up cluster conversation in group list.
Step 103-104: the controlled function server receives that the interim shake bell ring that arbitrary called party client end is received should be then to calls customer end answer shake bell message.
Step 105-106: the controlled function server receives that the reception of arbitrary called party client end replys, and then replys session to the calling party and sets up successful message.
So far, session is set up successfully.
Two, tabulate according to interim call object and set up session
It is similar to the method for setting up cluster conversation according to pre-established group that this kind set up the method for cluster conversation, its difference is, the information difference that the INVITE of setting up cluster conversation that user end to server sends comprises, tabulate according to interim call object and to set up under the situation of session, this INVITE comprises the MIME data of XML form, these data are tabulations of a call object sign, and wherein, the example of call object identification list is as follows:
Content-type：application/resource-lists+xml
Content-Disposition：recipient-list
<？xml?version＝″1.0″encoding＝″UTF-8″？>
<resource-lists?xmlns＝″urn:ietf:params:xml:ns:resource-lists″
xmlns:xsi＝″http://www.w3.org/2001/XMLSchema-instance″>
<list>
<entry?uri＝″sip:PoC-UserB@networkB.com″/>
<entry?uri＝″sip:PoC-UserC@networkC.com″/>
<entry?uri＝″sip:PoC-UserD@networkD.com″/>
</list>
</resource-lists>
Three, the mode in user oneself adding meeting-place is set up session, and mode and the present invention that this kind set up cluster conversation have nothing to do, so need not statement.
In addition, the calls customer end parameter that (ondemond mode) consults medium when (pre-establish mode) or initiation session before initiation session is promptly carried media parameter in INVIT message.See table:
Parameter declaration:
C: IP address that communication is used and IP address version
M: medium type, encoding scheme, port numbers
A: medium property
In addition, the calls customer end can also be in conversation procedure the media parameter of consulting session again.
From above scheme as can be seen, for the host-host protocol that does not possess conversation end, as MSRP, the user is after initiating a session, as consulted a plurality of medium, the port and the Internet resources of these a plurality of medium take always, finish heavily negotiations process or end session up to the user.When session is set up, consulted two kinds of medium as the user, a kind of is picture (adopting MSRP), a kind of is voice (adopting RTP), in the conversation procedure, because the picture transmission is fewer, the Internet resources that picture is relevant take always, finish up to whole session, thus the waste gridding resource.
In addition, medium and answer-mode are mixed in together, make to reply and be difficult to handle, such as voice call automatic-answering back device that the user wishes to come, and the video session manual answering, the user initiates one and promptly comprises the session that voice comprise video again, is manual answering or automatic-answering back device, relatively is difficult to definition.
Multiple medium make the right to speak request handle more complicated in a session, need the message of multiple request right to speak, transmit power etc. as request speech utterance power, demand file.
Summary of the invention:
For port and the Internet resources that solve a plurality of medium in the prior art take always, thereby the problem of waste Internet resources the invention provides a kind of method of setting up cluster conversation.
For achieving the above object, the invention provides a kind of method of setting up cluster conversation, this method comprises the steps that A, calls customer end send to server and sets up the message of second session that this message is carried first session identification; B, server obtain the group member tabulation of the cluster conversation that participates in the first session identification correspondence; And server distributes second session identification for described second session of setting up, and sets up the incidence relation of this first session session corresponding with described second session identification; C, server are initiated to set up the request of second session to described group member, and are set up second session.
Preferably, before the execution in step B, also should carry out following steps: server is judged the cluster conversation that has the first session identification correspondence, and execution in step B.
Preferably, server comprises the conversation strategy of first session, before the execution in step C, also should carry out following steps: server is judged that described message satisfies and is set up the strategy of session, and execution in step C.
Preferably, described conversation strategy comprises that the calls customer end is the participant of first session, and server is judged the client of calls customer end for the group member of the cluster conversation of participation session identification correspondence, and execution in step C;
Or described conversation strategy comprises that the medium type in the message of setting up session that server judgement calls customer end sends satisfies described conversation strategy, and execution in step C to setting up the restriction of the medium type that comprises in second session.
Preferably, server comprises the conversation strategy of first session, described conversation strategy comprises the restriction of the second session level of nesting in first session, and server is judged the condition of the second session level of nesting in satisfied relevant first session of described second session, and execution in step C.
Preferably, this method comprises the steps: that also D21, user end to server send the end session request of carrying first session identification; D22, server finish first session of client participation and second session in all first sessions.
Preferably, the message that this method also comprises the steps: D31, the group member that do not add first session sends adding first session of carrying first session identification to server; D32, server add first session with the described group member that does not add first session, and return the response message that carries the medium type of second session identification and second session in first session to the described group member that does not add first session; D33, the described group member that does not add first session carry the request message of adding second session of second session identification to the server transmission, and server adds second session with the described group member that does not add first session.
By above scheme as can be seen, beneficial effect of the present invention is as follows:
1) in the carrying out of first session, sets up second session of different media types as required, and the resource of the multiple medium type in the same session, port are taken always, improve the use of system resource.
2) medium type that comprises in the same session is fewer, makes the answer-mode of group member oversimplify, and the realization of corresponding right to speak request also obtains simplifying.
Description of drawings:
1. Fig. 1 is for setting up the flow chart of cluster conversation in the prior art;
2. Fig. 2 is a flow chart of setting up cluster conversation provided by the invention;
3. Fig. 3 is the embodiment figure that sets up cluster conversation provided by the invention;
4. Fig. 4 called party client end provided by the invention is invited the flow chart that adds second session;
5. Fig. 5 is a flow chart of setting up the embodiment of second session by first session identification provided by the invention;
6. Fig. 6 withdraws from the flow chart of the embodiment of second session for client provided by the invention;
7. Fig. 7 adds the flow chart of the embodiment of second session for client provided by the invention;
Embodiment:
The present invention is further described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, when the called party client end with when participating between the function server pre-established session and adopting automatic-answering back device, the flow process of setting up cluster conversation among the embodiment provided by the present invention is as follows:
Step 201: in the time will in the cluster conversation of having set up (to call first session in the following text), setting up new cluster conversation (to call second session in the following text), added i.e. first session of certain cluster conversation as the calls customer end, and desire in first session, to set up second session, then the calls customer end is initiated one to server and is set up second conversation request, comprises first session identification in this request message;
Step 202: server judges according to first session identification in the request whether the cluster conversation of the described first session identification correspondence exists, if exist, then obtains the group member identification list that participates in first session according to described session identification;
Step 203, the server group member in the group member identification list is initiated the cluster conversation request, and sets up cluster conversation.
As shown in Figure 3, the calls customer end is set up second session in first session, and the flow process of calls customer end is as follows, and wherein the controlled function server has session identification;
Step 301-305, calls customer end send the INVITE of setting up cluster conversation to the controlled function server, wherein, carry first session identification in this INVITE.In addition, can also carry the sign that desire is set up new cluster conversation in this INVITE, this sign is used for distinguishing the situation that the group member that does not add first session adds session.
Wherein, the controlled function server can limit and have only the member of the cluster conversation of participate in setting up just can send the new request of setting up cluster conversation.Therefore, after the controlled function server is received the INVITE of setting up cluster conversation that the calls customer end sends, judge whether the calls customer end is the group member that participates in the cluster conversation of the cluster conversation sign correspondence in the INVITE, then accept the INVITE that the calls customer end sends in this way, and carry out subsequent step; Do not possess the message of setting up the cluster conversation authority otherwise return to the calls customer end, thus process ends, and the controlled function server also can not carried out any action certainly.
In addition, the controlled function server can also judge whether the medium type in the INVITE that the calls customer end received sends is consistent with the medium type of setting up cluster conversation, and whether carry out subsequent step according to the strategy decision of setting up session: as set up conversation strategy and do not allow and create 2 same voice conversations, but during the session that the file that can create two or more transmits, medium type as first session is voice, medium type in the INVITE of calls customer end also is voice, server judges that according to strategy can not set up the cluster conversation that calls customer end desire sets up promptly can not set up second session, and reply to the calls customer end and can not set up the message of second session or not carry out any action, and process ends.If strategy allows the media type format in the INVITE, then execution in step 306.
In addition, the strategy of the strategy of second session and first session can be identical, and promptly when the user asked to add second session, server was checked the access strategy of first session.Can add first session as the user, then the user also can add second session.
In addition, the controlled function server can also limit the maximum quantity of second session in one first session, and this numeral can be defined by the operator, also can be by defining in the group definition file.If server is restricted to the maximum quantity of second session in first session, then server is behind the INVITE of receiving the calls customer end, second session of judging the foundation of calls customer end desire is which session in its first session, whether this second session exceeds the second session number quantitative limitation that its first session is allowed, if, the controlled function server is replied to the calls customer end and can not be set up the message of cluster conversation or not carry out any action, and process ends.Otherwise, execution in step 306.
In addition, server can be set up the related pass bar of first session and second session, and limits the level of nesting of second session in one first session, and this numeral can be defined by the operator, also can be by in the group definition file, defining, general two-stage to three is grade just enough.Server is behind the INVITE that reception calls customer end sends, judge whether second session has exceeded in first session at the second session place restriction for the level of nesting, if exceed, the controlled function server is replied to the calls customer end and can not be set up the message of cluster conversation or not carry out any action, and process ends.Otherwise, execution in step 306.
Step 306, controlled function server are that second session that calls customer end desire is set up distributes second session identification, and send the message of setting up cluster conversation to the group member (being the called party client end) that participates in pairing first session of second session.This message comprises the ID of medium that comprise in second session identification, first session identification and second session and the promoter who initiates second session (being the calls customer end).
Step 307, called party client end insert second session according to the message of setting up second session that the controlled function server of being received sends.
Step 307-310, second session are set up successfully, and the controlled function server sends second session to the calls customer end and sets up successful message.Wherein, carry the media parameter and second session identification of second session of having consulted in this message.If the controlled function server has been set up the incidence relation of second session identification and first session identification, then second session that sends to client of controlled function server set up successful message the participation function server of process all will preserve this incidence relation, and according to this incidence relation execution.
As shown in Figure 4, the called party client end that has participated in first session is invited the flow process that adds second session as follows:
Step 401-405, controlled function server send to the group member (being the called party client end) that participates in pairing first session of first session and invite the message that adds second session.Promoter's's (being the calls customer end) that this message comprises the medium (parameter or type) that comprise in second session identification, first session identification, second session and initiates second session ID;
Step 406-409, called party client end return the OK response message to the controlled function server after receiving and inviting the message that adds second session; Comprise in this message (second session identification, media parameter and connector's's (called party client end) ID through consulting, and add second session.
First embodiment:
As shown in Figure 5, create the flow process of embodiment of second session by first session identification as follows for client:
Step 501-502, Bob send to the controlled function server and set up the INVITE of second session, the media parameter that this message is carried first session identification (ID), Bob (comprises port numbers, encoding scheme, the agreement (as MSRP) that transmission is adopted, file type, the description that size etc. are relevant).It is as follows that this media parameter is retouched art with Session Initiation Protocol:
REQUEST-URI：
＜sip:SESSION-ABCDEF@domain.net; Operation=create-new-session〉// be requested object and be the member in this session, and have the indication of creating new session
After the controlled function server was received the INVITE that Bob sends, (present embodiment was Rose, Jack), and is that second session distributes second session identification to obtain the group member of the cluster conversation that participates in the first session identification correspondence in the invitation message;
Step 503-504, controlled function server are to described group member (Rose, Jack) INVITE of second session is set up in transmission, this message is carried: the media parameter of first session identification, second session identification and controlled function server (comprises port numbers, encoding scheme, transmit the agreement that adopts, file type, the description that size etc. are relevant); This media parameter is described below with Session Initiation Protocol:
REQUEST-URI：ROSE@domainx.net
Contact:<sip:new_session_id@domain.net；
parent_session_id＝SESSION-ABCDEF@domain.net>
After step 505-507, controlled function server are received the response of Rose, send session to Bob and set up successful OK response message.This message is carried: the media parameter of second session identification, second session consulted.
After Bob receives that second session of controlled function server is created as the function response message, beginning blit sheet, Rose begins to receive;
In addition, when adopting MSRP to send picture, Rose just withdraws from session after distributing picture after the controlled function server sends BYE message (SIP BYE), the controlled function server promptly sends bye message to receiving terminal after distributing picture to receiving terminal user Rose, Jack.
Second embodiment:
As shown in Figure 6, to withdraw from the flow process of second session as follows for client:
Step 601-608, Bob send the request of setting up second session (RTP video) to the controlled function server, the controlled function server sends the request that adds sub-session (RTP video) to participant Rose, the Jack of first session (voice conversation), and Rose, Jack add second session.
Step 609-610, Bob carry first session identification to the BYE message of controlled function server transmission end session in the message;
Step 611-612, controlled function server return the OK response message to Bob, close second session of setting up in first session and first session.
If the controlled function server is when receiving the request that finishes first session, except the resource that session occupied of release and Bob, also all unidirectional Bob are the request of sender's second session in this first session of other clients (Rose, Jack) transmission end.
The 3rd embodiment:
As shown in Figure 7, if BOB invites Rose and Jack to enter voice conversation, Rose enters, and Jack is not because of busy entering, but Bob has known voice conversation sign (ID).Bob and Rose had set up video session again afterwards.The flow process that client adds second session is as follows:
REQUEST-URI：<sip:SESSION-audio@domain.net；operation＝join-session>
Step 702, Jack successfully add first session, and the controlled function server returns the OK response message to Jack, and this message is carried the medium type of all second session identifications and second session in first session, i.e. the medium type of video session sign and video session.This message is described with XML, and wherein the SIP form is as follows:
Content-Type： application/sub_session_set +xml
(application/sub_session_set is a kind of application data expansion that the present invention creates)
XML?MIME?BODY
<？xml?version＝″1.0″encoding＝″UTF-8″？>
<sub_session_set?xmlns＝″urn:oma:params:xml:ns:poc:poc-settings″
xmlns:xsi＝″http://www.w3.org/2001/XMLSchema-instance″
xsi:schemaLocation＝″urn:oma:params:xml:ns:poc:poc-settings″>
<sub_session>
<id>session_video@domain.net</id>
<media_type>video<media_type>
</sub_session>
</sub_session_set>
Certainly, for the second unidirectional session, as the session that file transmits, there is this second session in the user that the controlled function server can not tell the back to add, also promptly can not carry the second unidirectional session identification in this OK response message.
By above scheme as can be seen, the present invention is by setting up second session of different media types as required in the carrying out of first session, and the resource of the multiple medium type in the same session, port are taken always, improves the use of system resource.
Certainly, the above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method of setting up cluster conversation is characterized in that this method comprises the steps:
A, calls customer end send to server and set up the message of second session, and this message is carried first session identification;
B, server obtain the group member tabulation of the cluster conversation that participates in the first session identification correspondence; And server distributes second session identification for described second session of setting up, and sets up the incidence relation of this first session session corresponding with described second session identification;
C, server are initiated to set up the request of second session to described group member, and are set up second session.
2. the method for setting up cluster conversation as claimed in claim 1 is characterized in that also should carrying out following steps before the execution in step B: server is judged the cluster conversation that has the first session identification correspondence, and execution in step B.
3. the method for setting up cluster conversation as claimed in claim 1 is characterized in that server comprises the conversation strategy of first session, before the execution in step C, also should carry out following steps: server is judged that described message satisfies and is set up the strategy of session, and execution in step C.
4. the method for setting up cluster conversation as claimed in claim 3, it is characterized in that: described conversation strategy comprises that the calls customer end is the participant of first session, server is judged the client of calls customer end for the group member of the cluster conversation of participation session identification correspondence, and execution in step C;
Or described conversation strategy comprises that the medium type in the message of setting up session that server judgement calls customer end sends satisfies described conversation strategy, and execution in step C to setting up the restriction of the medium type that comprises in second session.
5. the method for setting up cluster conversation as claimed in claim 1, it is characterized in that: server comprises the conversation strategy of first session, described conversation strategy comprises the restriction of the second session level of nesting in first session, server is judged the condition of the second session level of nesting in satisfied relevant first session of described second session, and execution in step C.
6. the method for setting up cluster conversation as claimed in claim 1 is characterized in that this method comprises the steps: that also D21, user end to server send the end session request of carrying first session identification;
D22, server finish first session of client participation and second session in all first sessions.
7. the method for setting up cluster conversation as claimed in claim 1 is characterized in that the message that this method also comprises the steps: D31, the group member that do not add first session sends adding first session of carrying first session identification to server;
D32, server add first session with the described group member that does not add first session, and return the response message that carries the medium type of second session identification and second session in first session to the described group member that does not add first session;
D33, the described group member that does not add first session carry the request message of adding second session of second session identification to the server transmission, and server adds second session with the described group member that does not add first session.
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| CN2006100616678A CN101106536B (en) | 2006-07-15 | 2006-07-15 | A method for establishing group session |
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| CN1684530A (en) * | 2004-04-16 | 2005-10-19 | 捷讯研究有限公司 | Method and apparatus for dynamic group address creation |
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| CN101106536A (en) | 2008-01-16 |
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