CN101026614B - Media type parameter negotiation method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000000977 initiatory effect Effects 0.000 claims abstract description 8
- 230000006854 communication Effects 0.000 claims description 32
- 238000004891 communication Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 description 30
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- 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
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- 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
- H04L65/4061—Push-to services, e.g. push-to-talk or push-to-video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
- H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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- 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
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
Abstract
The present invention discloses a method for negotiating media type parameter applicable for a multimedia subsystem IMS. The method comprises: a calling side initiating this multiparty session to a network entity for controlling session through a session initialized protocol (SIP) message; the network entity for controlling session sending the media type parameter that can be selected in the multiparty session to all or part of the called party participating in the session; all or part of called side participated in the session selecting all or part of media type parameters from media type parameter the network entity for controlling the session receiving the ACK message including all or part of media type parameter selected by the all or part of the called party participating in the multiparty session from the media type parameter sent by the network entity for controlling the session. The method provided by the present invention can realize to negotiate the media type parameter in the SIP message.
Description
Technical field
The present invention relates in mobile communication system, handle the technology of media parameter, particularly a kind of machinery of consultation of media type parameter.
Background technology
Along with the development of broadband network, mobile communication system not only is confined to traditional voice communication, and can be in conjunction with multiple media business such as audio frequency, video, picture and texts.Multiple media business by with present that business (presence), short message, webpage (WEB) are browsed, the combining of data service such as locating information, propelling movement business (PUSH) and file-sharing, can satisfy the multiple demand of user terminal.
Under the promotion of several data service application, normal structure such as 3GPP and 3GPP2 has all successively been released IP multimedia subsystem, IMS (IMS) framework based on Internet protocol (IP), purpose is to use a kind of standardization open architecture to realize diversified multimedia service application in mobile communication system, offers more selection of user terminal and abundanter impression.
At 3GPP version 5 (R5, Release) stage, introduced IMS, IMS is superimposed upon on the packet field network, is made up of CCF (CSCF), MGCF (MGCF), media resource function (MRF) and home signature user server functional entitys such as (HSS).Wherein CSCF can be divided into serving CSCF (S-CSCF), proxy CSCF (P-CSCF) and three logic entities of inquiry CSCF (I-CSCF) again.S-CSCF is the service switching center of IMS, carries out session control, and peace preservation association's speech phase is in charge of user terminal information, produces charge information etc.; P-CSCF is the access point that UE inserts IMS, finishes the user terminal registration, is responsible for service quality (QoS) control and safety management etc.; I-CSCF is responsible for the intercommunication between the IMS territory, and network topology and configuration are externally hidden in distribution and the selection of management S-CSCF, produce metering data etc.The MGCF control gateway realizes the intercommunication of IMS and other network.MRF provides media resource.The subscription data of HSS storage user terminal and configuration information etc.
On the packet network that the IMS network of 3GPP definition also can be applied to define among the 3GPP2, provide the intercommunication with the polytype network, realize and use the independence of type of user terminal.Therefore do not limit the IMS network here and only be applied in relevant network of 3GPP and the application, the access network of other types and the business of bearer network also can realize with the IMS framework with using.
Conversation initialized protocol (SIP) is the IP phone signaling protocol that is proposed by Internet engineering duty group (IETF).SIP is used for initiation session, it can control the foundation and the termination of the Multimedia session of a plurality of participants' participation, and can dynamically adjust and revise session attribute, as session bandwidth require, the code/decode format of the medium type (voice, video and text etc.) of transmission, medium, to the support of multicast and clean culture etc.In the IMS network, use the signaling control protocol of Session Initiation Protocol as IP multimedia session.
In the multi-party conversation communication technology based on control, need between the network entity of multi-party conversation communication system, hold consultation to the media parameter in the sip message, according to the existing protocol regulation, media parameter comprises media type parameter and coding parameter.In the session communication process, the each side that participates in session can also select different media type parameters to use in same multi-party conversation.Therefore, between the network entity in communication system, particularly just must carry out the negotiation of the media type parameter of sip message between the network entity in the multi-party conversation communication system, still, in the multi-party conversation communication system, also how not carry out the technology that media type parameter is consulted in the sip message at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of machinery of consultation of media type parameter, and this method can realize the negotiation of media type parameter in the sip message.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of machinery of consultation of media type parameter, this method is applied in the multimedia subsystem, IMS, and this method comprises:
A1, calling party initiate this multi-party conversation by Session initiation protocol SIP message to the network entity of control session;
The network entity of A, control session sends the media type parameter that this session can be selected to the callee of all or part of this multi-party conversation of participation;
The callee of B, all or part of this multi-party conversation of participation selects all or part of media type parameter from the media type parameter of the network entity transmission of control session.
Described sip message carries the one or more media type parameter that the calling party uses in this multi-party conversation.
After step B, this method also comprises:
The callee of C, all or part of this multi-party conversation of participation is carried at selected one or more media type parameters the network entity that sends to the control session in the sip message.
After step C, this method also comprises:
The callee of all or part of this multi-party conversation of participation that the network entity of D1, control session will receive is carried at selected one or more media type parameters in one or more sip messages and sends to the calling party.
After step C, this method also comprises:
The network entity of D2, control session sends to the calling party with the one or more media type parameter that the calling party who self supports uses or/and the one or more medium type that the calling party who self supports does not use is carried in the sip message in this multi-party conversation in this multi-party conversation.
This method also comprises: the network entity of control session offers calling party as media type parameter with the one or more medium type that the calling party does not use in sip message in this multi-party conversation.
The media type parameter that this session that the network entity of the described control session of steps A is determined to send according to self session ability and multi-party conversation communication system Provisioning Policy can be selected.
Described self session ability and multi-party conversation communication system Provisioning Policy carrier policy are used to determine the medium type of all or part of multi-party conversation communication system support is provided or/and be used for determining sending all or part of media type parameter that this session is supported to the callee of all or part of this multi-party conversation of participation.
The media type parameter that described this session can be selected is carried in the sip message and sends.
The network entity of described control session is based on the server of the control session of multimedia control PTT PoC communication system or based on the server of the control session of multimedia full duplex meeting Conference communication system.
From such scheme as can be seen, the present invention is when setting up a multi-party conversation, and at first, the calling party is to the network entity initiation session of control session; Secondly, the network entity of the control session media type parameter that provides this session to select to the callee of all or part of this multi-party conversation of participation according to strategy; At last, the callee of all or part of this multi-party conversation of participation selects the media type parameter that the network entity of one or more control sessions provides.Like this, method provided by the invention can realize the negotiation of media type parameter in the sip message.
Description of drawings
Fig. 1 is the flow chart of the machinery of consultation embodiment one of media type parameter of the present invention;
Fig. 2 is the flow chart of the machinery of consultation embodiment two of media type parameter of the present invention;
Fig. 3 is the schematic network structure of the machinery of consultation of realization media type parameter of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
Multi-party conversation communication system of the present invention can be for based on multimedia control PTT (PoC) communication system or based on multimedia full duplex meeting (Conference) communication system.
In the multi-party conversation communication system of introducing the multimedia type, when setting up a multi-party conversation, at first, the calling party is to the network entity initiation session of control session, send sip message as network entity, in sip message, generally carried the media type parameter that to set up session to the control session.The media type parameter that carries in sip message can be all medium types that the calling party supports, also may be a part of medium type that the calling party supports, the i.e. subclass of the medium type of Zhi Chiing.The media type parameter that carries in sip message also can be the subclass of the network entity institute support media type of control session in the network.Secondly, the network entity of control session is according to session ability and multi-party conversation communication system Provisioning Policy, media type parameter to the callee of all or part of this multi-party conversation of participation provides this session to select sends the sip message that carries media type parameter as the callee to whole these multi-party conversations of participation; At last, the callee who participates in this multi-party conversation selects to use wherein one or more media type parameters according to oneself requirement, the media parameter type that the callee selects is the subclass of the media type parameter that carries in the sip message that receives of callee, as the media type parameter of selecting one or more received sip messages to carry.Therefore, method provided by the invention can make and use different medium types at session establishment phase according to oneself requirement in many ways in the session.
The process of carrying media type parameter in sip message is: medium type is arranged in the sip message, and the information of each medium type also is set corresponding to each medium type in sip message.The information of medium type also can be provided with according to the method for IETF RFC3264 standard code, can also be provided with according to other rules about media type parameter, and other rules can comprise the RFC document stipulated in the ietf standard and ietf draft etc.
In the present invention, multi-party conversation also can be can't help the calling party and be initiated, but directly initiate this multi-party conversation by the network entity of control session, the network entity of control session sends the sip message that carries the media type parameter that this session can select to all or part of callee who participates in this session when initiating this multi-party conversation, as visit (INVITE) request.
In the present invention, the calling party also can carry the media type parameter that the calling party uses to the sip message of the network entity transmission of control session.
Fig. 1 is the flow chart of the machinery of consultation embodiment one of media type parameter of the present invention, and the application scenarios of this embodiment is based on multimedia PoC communication system, and its concrete steps are:
Step 100, calling party PoC Client A send visit (INVITE) request to affiliated PoC server PoC Server A, PoC Server A is used to set up multimedia PoC session in many ways, the media type parameter that this request is carried is voice and discrete medium, and discrete medium can be text, picture and file.At this moment, PoC Client A is connected to the multimedia that PoC Server A asks to set up voice and discrete medium type.
This INVITE request is sip message.
Step 101, PoC Server A are transmitted to this request by the SIP network server PoC Server X of control session.
Step 102, PoC Server X can support multiple medium type as the controlled function entity of session, comprise voice, video, discontinuous medium type, determine to support this medium type of video according to multi-party conversation communication system strategy that sets in advance and the session ability that self provides, this media type parameter of video is added in this request, ask to send to a callee PoC Client B of this multi-party conversation carrying the INVITE that comprises video, voice and discrete media type parameter.At this moment, PoCServer X is in the INVITE request that PoC Client B sends, comprised the media parameter of setting up voice, video and discontinuous medium type, the one or more media type parameters in will asking to INVITE by PoC Client B selective reception.
Step 103, PoC Server X can support multiple medium type as the controlled function entity of session, comprise voice, video, discontinuous medium type, determine to support this medium type of video according to multi-party conversation communication system strategy that sets in advance and the session ability that self provides, this media type parameter of video is added in this request, ask to send to another callee PoC Client C of this multi-party conversation carrying the INVITE that comprises video, voice and discrete media type parameter.At this moment, PoC Server X is in the INVITE request that PoC Client C sends, comprised the media parameter of setting up voice, video and discontinuous medium type, the one or more media type parameters in will asking to INVITE by PoC Client C selective reception.
The complete or collected works or the subclass of the medium type during step 104, PoC Client B selective reception are asked to INVITE, in response message, return selected media type parameter, when carrying nonoptional media type parameter, there is not selecteed medium type to preserve separately as information.
The complete or collected works or the subclass of the medium type during step 105, PoC Client C selective reception are asked to INVITE, in response message, return selected media type parameter, when carrying nonoptional media type parameter, do not have the selecteed media type parameter information that is used as to preserve separately, as be labeled as and do not activate.
Step 106, PoC Server X be as the controlled function entity of session, receive the media type parameter that response message wherein carries after, echo reply message.
Regulation according to the PoC system, after PoC Server X receives the response message that first callee returns, return success the response message of setting up session for calling party PoC Client A, this response message is carried the media type parameter that the calling party according to the strategy support that sets in advance uses in session, this response message finally sends to PoC Client A by the PoC Server A of PoC under the PoC Client A.
In response message, can also carry all or part of media type parameter that PoC Server X supports as the controlled function entity of session, as the information that offers PoC Client A.The controlled function entity provides all or part of media type parameter, can determine according to the strategy that is provided with.
Fig. 2 is the flow chart of the machinery of consultation embodiment two of media type parameter of the present invention, and the application scenarios of this embodiment is based on multimedia PoC communication system, and its concrete steps are:
Step 200, calling party PoC Client A send the INVITE request to affiliated PoC server PoC Server A, and multimedia PoC session is in many ways set up in request, and the media type parameter that this request is carried is voice and text.
If the medium type that the calling party supports is voice, video and text, video also can also be carried in the INVITE request, but, because PoC Client A does not wish to use video in this multi-party conversation process, so this medium type of video is identified separately, as is labeled as and does not activate.
At this moment PoC Client A request is set up being connected of voice and discontinuous medium type.
Step 201, PoC Server A are transmitted to this request the server PoC ServerX of control session.
Step 202, PoC Server X determine to support this medium type of video according to the session ability tactful and that self provide that the multi-party conversation communication system sets in advance, this media type parameter of video is added in this request, the INVITE request that carries the media type parameter that comprises video, voice and text is sent to a callee PoC Client B of this multi-party conversation.
If PoC Client A does not wish to use video in this multi-party conversation process, PoC ServerX also can identify this medium type of video separately, can be designated in this multi-party conversation process and not support, as video media type for not activating.
Step 203, PoC Server X determine to support this medium type of video according to the session ability tactful and that self provide that the multi-party conversation communication system sets in advance, this media type parameter of video is added in this request, the INVITE request that carries the media type parameter that comprises video, voice and text is sent to another callee PoC Client C of this multi-party conversation.
If PoC Client A does not wish to use video in this multi-party conversation process, PoC ServerX also can identify this medium type of video separately, can be designated in this multi-party conversation process and not support, as video media type for not activating.
After step 204, PoC Client B receive the INVITE request, after being chosen in one or more media type parameters that the sip message that uses in this multi-party conversation provides according to oneself requirement, in response message, carry selected one or more media type parameter, response message is sent to PoCServer X.
Such as, PoC Client B selects to use voice, video and text as the medium type that participates in this multi-party conversation, carries the media type parameter that comprises selected selection use voice, video and text in response message.Response message can be 200OK message, and this 200OK message also is sip message.
If PoC Client B receives in the INVITE request this media type parameter of video and is designated and does not support that then PoC Client B can not select this medium type of video.
After step 205, PoC Client C receive the INVITE request, after being chosen in one or more media type parameters that the sip message that uses in this multi-party conversation provides according to oneself requirement, in response message, carry selected one or more media type parameter, response message is sent to PoCServer X.
Such as, PoC Client C selects to use voice and text as the medium type that participates in this multi-party conversation, carries the media type parameter that comprises selected selection use voice and text in response message.Response message can be 200OK message, and this 200OK message also is sip message.
Step 206, PoC Server X are according to from the response message that PoC Client C and PoC Client B receive, determine the medium type that PoC Client C and PoC Client B select, the medium type that PoCClient C and PoC Client B are selected is carried at as the media type parameter of PoC Client C and PoCClient B respectively and sends to PoC Server A in the response message, and this response message that PoC ServerA will receive is forwarded to PoC Client A.
Stipulate that in the PoC system PoC server just returns success the response message of setting up session to the calling party after receiving the response message that first callee returns.
PoC Server X also can be respectively be carried at the media type parameter of PoC Client C and PoC Client B and sends to PoC Server A in two response messages.Response message can be 200OK message, and this 200OK message also is sip message.
Like this, in the described method of Fig. 2, the calling party selects voice and the text medium type as session in this multi-party conversation, a callee selects voice, video and the text medium type as session in this multi-party conversation, another callee selects voice and the text medium type as session in this multi-party conversation.
The described method of Fig. 1 and Fig. 2 has just been described the medium type with tripartite multi-party conversation and has been selected, and the present invention can also surpass tripartite according to Fig. 1 and the described method of Fig. 2, as the medium type selection of ten sides' multi-party conversation.
Self session ability of the present invention and multi-party conversation communication system Provisioning Policy carrier policy are used to determine the medium type of all or part of multi-party conversation communication system support is provided or/and be used for determining sending all or part of media type parameter that this session is supported to the callee of all or part of this multi-party conversation of participation.
The strategy of setting of the present invention is: the strategy of operator or the strategy of multi-party communication system.The strategy of described operator can be that the network entity of control session provides all or part of media type parameter to whole callees; The network entity of control session provides all or part of media type parameter to the part callee.The strategy of described multi-party communication system can be that the network entity of control session provides all or part of media type parameter to whole callees; The network entity of control session provides all or part of media type parameter to the part callee.
Below lift a specific embodiment explanation the present invention.
Fig. 3 is the schematic network structure of the machinery of consultation of realization media type parameter of the present invention, as shown in the figure: PoC Server support voice, video and discrete medium type.The calling party sets up a session, and uses the medium type of voice and discontinuous medium in the session of being set up.
PoC Client A, PoC Client B, PoC Client C and PoC Client D wish respectively to use voice, voice/video, voice/video/discontinuous medium and voice as medium type in this session as the callee.
At first, PoC Server is when the INVITE of the media type parameter that carries voice and discontinuous medium that receives calling party's transmission request, PoC Server asks to a plurality of the called transmission INVITE respectively according to the strategy that sets in advance, the media type parameter that carries in this request is all medium types that PoC Server supports, as voice, video and discrete medium type of PoC Server support; Then, a plurality of callees, it is the INVITE request that PoC Client A, PoC Client B, PoC Client C and PoC ClientD receive all medium types that carry PoC Server support, subclass according to the medium type that carries in the self-demand selection INVITE request, and return the media type parameter of selection in response message 200OK, for PoC Server, select voice as PoC Client A, and the media type parameter of voice is carried at returns to PoC Server among the response message 200OK; PoC ClientB selects voice/video, and the media type parameter of voice/video is carried at returns to PoC Server among the response message 200OK; PoC Client C selects voice/video/discontinuous medium, and the media type parameter of voice/video/discontinuous medium is carried among the response message 200OK returns to PoCServer; PoC Client D selects voice, and the media type parameter of voice is carried at returns to PoC Server among the response message 200OK.
PoC Server will give calling party's echo reply message after receiving the response message of the called transmission.At this moment in the response message that PoC Server returns to the calling party, except having comprised the voice of accepting calling party's request and discontinuous medium as the medium type, the medium type that also provides PoC Server to support as video, carries out reference for the calling party.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the machinery of consultation of a media type parameter is characterized in that, this method is applied in the multimedia subsystem, IMS, and this method comprises:
A1, calling party initiate this multi-party conversation by Session initiation protocol SIP message to the network entity of control session;
The network entity of A, control session sends the media type parameter that this session can be selected to the callee of all or part of this multi-party conversation of participation;
The callee of B, all or part of this multi-party conversation of participation selects all or part of media type parameter from the media type parameter of the network entity transmission of control session.
2. the method for claim 1 is characterized in that, described sip message carries the one or more media type parameter that the calling party uses in this multi-party conversation.
3. the method for claim 1 is characterized in that, after step B, this method also comprises:
The callee of C, all or part of this multi-party conversation of participation is carried at selected one or more media type parameters the network entity that sends to the control session in the sip message.
4. method as claimed in claim 3 is characterized in that, after step C, this method also comprises:
The callee of all or part of this multi-party conversation of participation that the network entity of D1, control session will receive is carried at selected one or more media type parameters in one or more sip messages and sends to the calling party.
5. method as claimed in claim 3 is characterized in that, after step C, this method also comprises:
The network entity of D2, control session sends to the calling party with the one or more media type parameter that the calling party who self supports uses or/and the one or more medium type that the calling party who self supports does not use is carried in the sip message in this multi-party conversation in this multi-party conversation.
6. as claim 4 or 5 described methods, it is characterized in that, this method also comprises: the network entity of control session offers calling party as media type parameter with the one or more medium type that the calling party does not use in sip message in this multi-party conversation.
7. the method for claim 1 is characterized in that, the media type parameter that this session that the network entity of the described control session of steps A is determined to send according to self session ability and multi-party conversation communication system Provisioning Policy can be selected.
8. method as claimed in claim 7, it is characterized in that described self session ability and multi-party conversation communication system Provisioning Policy carrier policy are used to determine the medium type of all or part of multi-party conversation communication system support is provided or/and be used for determining sending all or part of media type parameter that this session is supported to the callee of all or part of this multi-party conversation of participation.
9. as claim 1,7 or 8 described methods, it is characterized in that the media type parameter that described this session can be selected is carried in the sip message and sends.
10. as claim 1,3,4,5 or 7 described methods, it is characterized in that the network entity of described control session is based on the server of the control session of multimedia control PTT PoC communication system or based on the server of the control session of multimedia full duplex meeting Conference communication system.
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| CN2006100080459A CN101026614B (en) | 2006-02-23 | 2006-02-23 | Media type parameter negotiation method |
| PCT/CN2007/000562 WO2007095855A1 (en) | 2006-02-23 | 2007-02-15 | A method and network entity for negotiating media type parameter |
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| CN2006100080459A CN101026614B (en) | 2006-02-23 | 2006-02-23 | Media type parameter negotiation method |
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| CN101753326A (en) * | 2008-12-19 | 2010-06-23 | 华为技术有限公司 | Interconnection selection function module for methods of business interconnection and session channel establishment and device |
| CN101854372B (en) * | 2009-04-03 | 2014-07-30 | 华为技术有限公司 | Method and device for controlling session media type during click to call |
| CN101594370B (en) * | 2009-06-19 | 2012-09-26 | 中兴通讯股份有限公司 | System and realizing method for click-to-dial service |
| CN102752121A (en) * | 2011-04-22 | 2012-10-24 | 中兴通讯股份有限公司 | Reverse charging method and device of multi-media stream |
| CN105282089B (en) * | 2014-05-30 | 2019-04-02 | 中国电信股份有限公司 | The method and system and intercommunication Media Gateway of media intercommunication |
| CN108270720B (en) * | 2016-12-30 | 2021-01-26 | 展讯通信（上海）有限公司 | Media negotiation method and device in multi-pass call and multi-pass terminal |
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|---|---|---|---|---|
| CN1478352A (en) * | 1999-08-04 | 2004-02-25 | Managing negotiations between users of computer network | |
| WO2004075581A1 (en) * | 2003-02-24 | 2004-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | A method and system for setting application settings for a push-to-talk service |
| CN1581744A (en) * | 2003-07-31 | 2005-02-16 | 北京三星通信技术研究有限公司 | Method for providing multiple QOS for MBMS business |
| WO2005018200A1 (en) * | 2003-08-18 | 2005-02-24 | Nokia Corporation | Setting up communication sessions |
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| GB0500483D0 (en) * | 2005-01-11 | 2005-02-16 | Nokia Corp | Multi-party sessions in a communication system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478352A (en) * | 1999-08-04 | 2004-02-25 | Managing negotiations between users of computer network | |
| WO2004075581A1 (en) * | 2003-02-24 | 2004-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | A method and system for setting application settings for a push-to-talk service |
| CN1581744A (en) * | 2003-07-31 | 2005-02-16 | 北京三星通信技术研究有限公司 | Method for providing multiple QOS for MBMS business |
| WO2005018200A1 (en) * | 2003-08-18 | 2005-02-24 | Nokia Corporation | Setting up communication sessions |
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| WO2007095855A1 (en) | 2007-08-30 |
| CN101026614A (en) | 2007-08-29 |
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