CN101835121A

CN101835121A - Method, system and device for carrying out adaptation processing on media negotiation

Info

Publication number: CN101835121A
Application number: CN200910079721A
Authority: CN
Inventors: 吴晓波; 温立; 张戬; 权威
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-03-09
Filing date: 2009-03-09
Publication date: 2010-09-15

Abstract

The invention discloses method, system and device for carrying out adaptation processing on media negotiation, belonging to the field of communication. The method comprises the following step of: after the media negotiation of a calling terminal and a called terminal fails, controlling a media negotiation adaptation gateway to be inserted into the media paths of the calling terminal and the called terminal by a media negotiation adaptation entity so as to finish the media negotiation adaptation of the calling terminal and the called terminal by the media negotiation adaptation gateway according to the media attribute information supported by the calling terminal and the media attribute information supported by the called terminal. The invention ensures the success of the media negotiation among different packet access networks and finishes call connection, thereby improving the service experience of users and enhancing the service feel.

Description

A kind of mthods, systems and devices that media negotiation carried out adaptation processing

Technical field

The present invention relates to the communications field, particularly a kind of mthods, systems and devices that media negotiation carried out adaptation processing.

Background technology

IMS (IP Multimedia Subsystem, IP Multimedia System) is 3GPP (Third Generation Partnership Project, third generation partner program) WCDMA of R5/R6 standard definition (Wideband Code Division Multiple Access, the Wideband Code Division Multiple Access (WCDMA) access) IP Multimedia System in the network, be 3G (Third Generation, the third generation) mobile network is realized packet voice and grouped data, and the unified multimedia service and the objective network of application are provided.IMS adopts the bearer path of IP packet domain as its control messages and media delivery, adopt SIP (The Session Initiation Protocol, session initiation protocol) agreement is as call control message, the Media Stream that will set up in its session is to describe, transmit, exchange and consult with SDP (Session Description Protocol, Session Description Protocol) agreement.

Access Network among the IMS and backbone network provide end-to-end QoS (Quality of Service with IMS, service quality), wherein, the end-to-end QoS mechanism that provides is that both sides' terminal UE realizes by media negotiation, and one of main effect of media negotiation is exactly at the media combination of using in the session and uses which kind of encoding scheme to reach an agreement.In order to realize consulting mutually between two terminal UE, SDP offer/answer (providing/reply) mechanism is provided, this mechanism allows UE to postpone finishing of SIP session foundation, all completes successfully resource reservation up to both sides.

VCC (Voice Call Continuity between IMS and Circuit System, voice continuity between IMS and the CS) mainly solve IMS VoIP voice and CS the carrying the TDM voice between call continuity, it is a kind of business that provides at the IMS network that user UE (User Equipment, subscriber equipment) belongs to.When VCC user UE carries out the voice conversation of an activity, just can realize calling out continuously by initiating the territory handoff procedure.Switch in order to carry out the territory, calling that VCC user UE initiates or that receive all will anchor to the DTF (Domain Transfer Function, territory hand-off process entity) of the IMS network of this user terminal ownership.Act on behalf of VCC user UE by this DTF and connect the initiation media negotiation to called UE, connect to set up called new user's face, medium type and coding and decoding scheme that DTF supports in new foundation is called out according to VCC user UE, and consult medium again between the called subscriber UE that calls out, promptly by upgrading remote leg (remote leg, session control leg between DTF and called subscriber UE) to replace access leg (access leg, the session control leg between DTF and caller VCC user UE).

The inventor finds in the process that realizes the embodiment of the invention, if media channel is consulted failure between DTF and user UE, if promptly the coding and decoding scheme supported of the code/decode format supported of caller VCC user UE and called subscriber UE can not be consulted success, such as there not being the common code/decode format of supporting to occur simultaneously, then session has this time reduced customer service experience owing to remote leg media channel negotiation failure causes the call continuity business to finish.

Summary of the invention

In order to ensure media negotiation success between the different grouping access network, finish and call out continuously, improve customer service and experience, strengthen professional impression, the embodiment of the invention provides a kind of mthods, systems and devices that media negotiation carried out adaptation processing.

On the one hand, the embodiment of the invention provides a kind of media negotiation has been carried out the method for adaptation processing, and described method comprises:

Behind calling terminal and terminal called media negotiation failure, the adaptive entity of media negotiation is controlled at and inserts the media negotiation adapter gateway in the media path of described calling terminal and described terminal called, so that the medium property information that described media negotiation adapter gateway is supported according to the medium property information and the terminal called of calling terminal support, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of method of media negotiation being carried out adaptation processing, when calling terminal and terminal called media negotiation failure, it is adaptive that the outlet gateway of notice IP access network carries out media negotiation, and notify the request that makes a call once more of described calling terminal, the outlet gateway that makes described IP access network is according to the medium property information of described calling terminal support and the medium property information of terminal called support, and the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of media negotiation has been carried out the system of adaptation processing, and described system comprises: the adaptive entity of media negotiation, media negotiation adapter gateway, wherein,

The adaptive entity of described media negotiation is used for when calling terminal and terminal called media negotiation failure, is controlled in the media path of described calling terminal and described terminal called and inserts the media negotiation adapter gateway;

Described media negotiation adapter gateway is used to obtain the medium property information of calling terminal support and the medium property information that terminal called is supported; According to the medium property information that the medium property information and the terminal called of calling terminal support are supported, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of media negotiation has been carried out the system of adaptation processing, and described system comprises: the outlet gateway of calling terminal and IP access network,

Described calling terminal is used for receiving the notice of the indication request of making a call once more when described calling terminal and terminal called media negotiation failure; According to described notice, send call request for the second time to described outlet gateway;

Described outlet gateway is used for when calling terminal and terminal called media negotiation failure, receives and carries out the adaptive notice of media negotiation; After receiving described notice, also be used to receive the call request second time that described calling terminal sends, according to the medium property information that the medium property information and the terminal called of calling terminal support are supported, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of media negotiation adaptive entity, and the adaptive entity of described media negotiation comprises:

Receiver module is used to know calling terminal and terminal called media negotiation failure;

Control module, the media path that is used for being controlled at described calling terminal and described terminal called inserts the media negotiation adapter gateway; Wherein, described media negotiation adapter gateway is used for the medium property information according to the medium property information of calling terminal support and terminal called support, and the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of media negotiation adapter gateway, and described media negotiation adapter gateway comprises:

Acquisition module is used to obtain the medium property information of calling terminal support and the medium property information that terminal called is supported;

Adaptation module is used for according to the medium property information of calling terminal support and the medium property information of terminal called support, and the media negotiation of finishing described calling terminal and described terminal called is adaptive.

On the other hand, the embodiment of the invention also provides a kind of outlet gateway of IP access network, and described outlet gateway comprises:

Receiver module is used for when calling terminal and terminal called media negotiation failure, receives and carries out the adaptive notice of media negotiation;

Processing module, be used for after receiving described notice, receive of the second time call request that notice sent of described calling terminal according to the indication request of making a call once more, according to the medium property information that the medium property information and the terminal called of calling terminal support are supported, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

The embodiment of the invention is behind calling terminal and terminal called media negotiation failure, by be controlled at the media negotiation adapter gateway of inserting in the media path of calling terminal and terminal called by the adaptive entity of media negotiation, adaptive by the media negotiation that this media negotiation adapter gateway is finished calling terminal and terminal called, thereby guarantee media negotiation success between the different grouping access network, finish and call out continuously, and then improve customer service and experience, strengthen professional impression.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 be the embodiment of the invention provide media negotiation is carried out the method flow schematic diagram of adaptation processing.

Fig. 2 is user's face schematic diagram that user UE that the embodiment of the invention 1 provides directly makes a call from IMS.

Fig. 3 be the embodiment of the invention 1 provide media negotiation is carried out the method flow schematic diagram of adaptation processing.

Fig. 4 is user's face schematic diagram of the insertion medium adapter gateway MGW that provides of the embodiment of the invention 1.

Fig. 5 is that the mutual schematic diagram of flow process is set up in the session that the embodiment of the invention 1 provides.

Fig. 6 is that the mutual schematic diagram of failure handling process is set up in the session that the embodiment of the invention 1 provides.

Fig. 7 is the process interface schematic diagram that the adaptive entity of media negotiation that the embodiment of the invention 1 provides seals in media negotiation gateway MGW in the medium face.

Fig. 8 is the process interface schematic diagram that media negotiation gateway MGW that the adaptive entity of the media negotiation that is arranged in callee side that the embodiment of the invention 1 provides will be positioned at callee side seals in the medium face.

Fig. 9 is user's face schematic diagram that user that the embodiment of the invention 1 provides makes a call from the CS territory.

Figure 10 be the embodiment of the invention 2 provide media negotiation is carried out the method flow schematic diagram of adaptation processing.

Figure 11 is user's face schematic diagram of the insertion medium adapter gateway MGW that provides of the embodiment of the invention 2.

Figure 12 is that the mutual schematic diagram of flow process is set up in the session that the embodiment of the invention 2 provides.

Figure 13 is that the mutual schematic diagram of failure handling process is set up in the session that the embodiment of the invention 2 provides.

Figure 14 be the embodiment of the invention 3 provide media negotiation is carried out the method flow schematic diagram of adaptation processing.

Figure 15 is that the method that media negotiation that the embodiment of the invention 4 provides carries out adaptation processing is handled mutual schematic diagram.

Figure 16 be the embodiment of the invention 5 provide media negotiation is carried out the system schematic of adaptation processing.

Figure 17 is the adaptive entity schematic diagram of media negotiation that the embodiment of the invention 6 provides.

Figure 18 is the media negotiation adapter gateway schematic diagram that the embodiment of the invention 7 provides.

Figure 19 be the embodiment of the invention 8 provide media negotiation is carried out the system schematic of adaptation processing.

Figure 20 is the outlet gateway schematic diagram of the IP access network that provides of the embodiment of the invention 9.

Embodiment

Embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.

In order to ensure media negotiation success between the different grouping access network, finish and call out continuously, and then improve customer service and experience, strengthen professional impression, the embodiment of the invention provides a kind of media negotiation has been carried out the method for adaptation processing, and referring to Fig. 1, this method thes contents are as follows:

101: the adaptive entity of media negotiation is known calling terminal and terminal called media negotiation failure;

102: the adaptive entity of media negotiation is controlled at and inserts the media negotiation adapter gateway in the media path of calling terminal and terminal called, so that the medium property information of the medium property information that the media negotiation adapter gateway is supported according to calling terminal, terminal called support, the media negotiation of finishing calling terminal and terminal called is adaptive.

Wherein, when this media negotiation failure, then the adaptive entity of media negotiation is controlled at medium face (or claiming user's face, loading end) and inserts the media negotiation adapter gateway to finish session foundation.At the above-mentioned method that provides, when specific implementation, can adopt following at least dual mode:

Mode one, for the network of having disposed IMS, the calling of Client-initiated or reception all will anchor to the adaptive entity of media negotiation of this user attaching IMS network, carries out the adaptive process of media negotiation thereby trigger by the adaptive entity agency of this media negotiation; This mode comprises: 1) the adaptive entity agency of the media negotiation of calling UE side carries out the situation of the adaptive process of media negotiation; 2) the adaptive entity agency of the media negotiation of called UE side carries out the situation of the adaptive process of media negotiation.With 1) the adaptive entity agency of the media negotiation of the calling UE side situation of carrying out the adaptive process of media negotiation is example, further, according to the position of calling terminal, also comprises following situation:

(1), directly to the adaptive entity IMS of the media negotiation that is arranged in IMS AS grappling, acts on behalf of the media negotiation of this terminal and terminal called by the adaptive entity of this media negotiation when making a call if calling terminal is positioned at the IMS territory.Wherein, if the media negotiation success, then calling terminal and terminal called call setup success; If media negotiation failure, then the adaptive entity of media negotiation is controlled at media path and inserts the media negotiation adapter gateway, and this media negotiation adapter gateway is used to change, thereby guarantees that calling terminal and terminal called consult successfully, thereby makes access success foundation.

(2) if calling terminal is positioned at 2G/3G circuit domain core net service range, as be positioned at the CS territory, at first need the calling of calling terminal is anchored to the IMS territory from the CS territory, then, adopt again and above-mentioned similar method realization call setup.

Mode two, for the network of having disposed IMS, only behind calling UE and the called UE media negotiation failure first time, just adopt PSI (Public Service Identities, public service identity) mode belongs to the adaptive entity of media negotiation of IMS network to calling subscriber or called subscriber, carries out the adaptive process of media negotiation thereby trigger by the adaptive entity agency of this media negotiation.This mode comprises equally: 1) the adaptive entity agency of the media negotiation of calling UE side carries out the situation of the adaptive process of media negotiation; 2) the adaptive entity agency of the media negotiation of called UE side carries out the situation of the adaptive process of media negotiation, with 1) the adaptive entity agency of the media negotiation of the calling UE side situation of carrying out the adaptive process of media negotiation for, further, according to the position of calling terminal, also comprise following situation:

(1) if calling terminal is positioned at the IMS territory, not signalling route to be gone on the adaptive entity to media negotiation once calling out, but after negotiation has been failed first, just find the adaptive entity of media negotiation by PSI, and then, by the adaptive entity of this media negotiation by inserting the media negotiation adapter gateway, thereby guarantee that by the conversion of this media negotiation adapter gateway calling terminal and terminal called consult successfully, thereby make access success foundation.

(2) if calling terminal is positioned at 2G/3G circuit domain core net service range, as be positioned at the CS territory, not signalling route to be gone on the adaptive entity to media negotiation once calling out, but after negotiation has been failed first, just find the adaptive entity of media negotiation by PSI, and then by the adaptive entity of this media negotiation by inserting the media negotiation adapter gateway, thereby guarantee that by the conversion of this media negotiation adapter gateway calling terminal and terminal called consult successfully, thereby make access success foundation.

Wherein, the adaptive entity of above-mentioned media negotiation is the application server (AS) with B2BUA (the back-to-back user agent of Back-to-Back UserAgent) function, in setting up, session can finish third party call control (3pcc, Third Party Call Control), the embodiment of the invention uses it to proxy user just to called initiation media negotiation.Wherein, media negotiation successfully is an indispensable step of setting up the media bearer passage, and the medium property that relates in the negotiation includes but not limited to medium type and code/decode format etc.

Correspondingly, adaptive entity proxy user of media negotiation and called subscriber consult the medium type and the code/decode format of desired use at a special session.Wherein, if the IP-CAN of two end subscribers (IP-Connectivity Access Network, IP connects Access Network) carrying can both be supported the conversation media attribute that negotiates, then set up carrying end to end and connect.

Embodiment 1

Present embodiment 1 at mode one related for the network of having disposed IMS, the adaptive entity of media negotiation that calling that user UE initiates or that receive all will anchor to this user attaching IMS network is elaborated:

Because user UE comprises when making a call: the situation that the user directly makes a call from IMS, and user's situation about making a call from the CS territory, the situation that present embodiment 1 directly makes a call from IMS with user UE is that example describes.

Referring to Fig. 2, user's face schematic diagram that the user UE that provides for the embodiment of the invention 1 directly makes a call from IMS, as shown in Figure 2, the entity that participates in mainly comprises: the newly-increased adaptive entity of media negotiation (AS for negotiation) under the ownership IMS of the S-CSCF under the ownership IMS of user UE (UE-IMS), this user UE (Serving-Call Session Control Function, service call conversation control function), this user UE under the ownership IMS of IMS AS and this user UE.Referring to Fig. 3, for user UE under this mode directly when IMS makes a call, what the embodiment of the invention 1 provided carries out the method flow schematic diagram of adaptation processing to media negotiation:

201: user UE calls out from the IMS initiation session, the Calling Side iFC of user UE (Initial Filter Criteria, initial filter standard or norm) triggers the adaptive entity of media negotiation (AS for negotiation) that user's conference call is routed to ownership IMS network.

202: the conference call that user UE initiates is routed to the adaptive entity of media negotiation of ownership IMS.

Wherein, the adaptive entity of this media negotiation comes proxy user to be initiated to called calling according to the third party call control mode.

203: after the media negotiation entity was received the conference call of the user UE that route is come, proxy user UE initiated media negotiation to called UE.

Wherein, this media negotiation entity is being acted on behalf of calling subscriber UE specifically comprises medium type and negotiation from coding and decoding scheme to the media negotiation of called initiation.

Further, act on behalf of calling subscriber UE and called subscriber UE carries out in the media consultation process at the adaptive entity of media negotiation, if consult failure, then further comprising the steps of:

204: in media path, insert the media negotiation adapter gateway MGW under the adaptive entity control of media negotiation.

205: media negotiation adapter gateway MGW implements encoding and decoding conversion, is connected with the user plane bearer of adaptive remote leg and access leg.

Referring to Fig. 4, user's face schematic diagram of the insertion medium adapter gateway MGW that provides for the embodiment of the invention 1.Wherein, above-mentioned called negotiation failure, can can not support identical conversation media attribute to cause because the adaptive entity of media negotiation is found the IP-CAN carrying of user UE and called subscriber UE, wherein, the IP-CAN of user UE and called subscriber UE can be different, can be respectively to include but not limited to GERAN (GSM/EDGE Radio Access Network, the GSM EDGE Radio Access Network network), UTRAN (Universal Terrestrial RadioAccess Network, universal terrestrial access network), E-UTRAN (Evolved Universal Terrestrial Radio Access Network, the universal terrestrial access network of evolution), HSPA (High Speed Packet Access, high-speed packet inserts), WLAN (Wireless Local Area Network, the wireless local area network), UMB (Ultra Mobile Broadband, ultra-mobile wide band network) and WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) wait other 3GPP access networks or non-3 GPP access network network.

Wherein, in the above-mentioned called negotiations process, P-CSCF of callee side IMS network (Proxy-CSCF, Proxy Call Session Control Function) and S-CSCF can refuse the particular media type and the coding and decoding scheme of SDP suggestion, can be because the strategy of operator causes.For example, operator does not allow to use the medium type or the unknown encoding scheme of any the unknown, because network may charge to these medium.If P-CSCF/S-CSCF finds SDP and has comprised unsupported medium type or encoding scheme in proposing, then the P-CSCF of callee side IMS network and S-CSCF will use 488 (not accepting) response to refuse this request herein, and point out the medium type of called support that operator allows in response.

Still as shown in Figure 4, can be between adaptive entity of media negotiation and the media negotiation adapter gateway based on Mn, because this medium adapter gateway MGW is subjected to the adaptive entity control of media negotiation, can adopt but be not limited to H.248 or megaco protocol (is Media Gateway Control Protocol, MGCP) communicates, also can adopt other internal interfaces and communication protocol.

Wherein, above-mentioned media negotiation adapter gateway MGW is used to provide media bearer and encoding and decoding conversion function, because this media negotiation adapter gateway MGW is a logical functional entity, during specific implementation, can finish this function by media negotiation adapter gateway MGW entity is set separately, further, in order to economize on resources, this above-mentioned logic function can also be arranged on other existing in IMS network MGW, establish realization by closing with this existing MGW, present embodiment is not done any restriction to this.

Wherein, further, be not affected in order to ensure other the professional AS under the existing IMS system architecture, the adaptive entity of above-mentioned media negotiation can be provided with the more close user side than other AS.

Referring to Fig. 5, set up the mutual schematic diagram of flow process for the session that the embodiment of the invention 1 provides, the user directly makes a call from IMS, and media negotiation adaptive entity proxy user UE and called subscriber UE carry out the negotiation of medium type and code/decode format.If the IP-CAN at two ends carrying can both be supported the conversation media attribute that negotiates, then set up end to end by normal that carrying connects, do not need to insert in the media path medium adapter gateway MGW and implement the code/decode format conversion.As shown in Figure 5:

1, calling UE sends calling SIP INVITE to its ownership IMS.Wherein, carry cells such as calling UE identifies, the called UE sign of calling UE calling, SDP medium property information among the SIP INVITE.

2, after the P-CSCF/I-CSCF of ownership IMS receives the SIP INVITE of calling UE transmission, SIPINVI TE is transmitted to the S-CSCF of ownership IMS.

3, S-CSCF receives SIP INVITE, and SIP INVITE is forwarded to the adaptive entity of media negotiation.Wherein, after S-CSCF received SIP INVITE, triggering the condition that SIP INVITE is forwarded to the adaptive entity of media negotiation was the iFC business, and promptly to obtain be the INVITE of calling SIP first that calling UE is sent to called UE to S-CSCF.

4, S-CSCF is forwarded to the adaptive entity of media negotiation with SIP INVITE.

After 5-6, the adaptive entity of media negotiation are received SIP INVITE,, send calling SIP INVITE to the ownership IMS of called UE by S-CSCF according to the cell that carries among the SIP INVITE.

After adaptive entity has been finished the media negotiation of calling UE and called UE by media negotiation, set up the VoIP voice call that is carried on IMS between calling UE and the called UE.

Referring to Fig. 6, for the mutual schematic diagram of failure handling process is set up in the session that the embodiment of the invention provides, when the adaptive entity of media negotiation is acted on behalf of calling UE and called UE and is carried out the negotiation of medium type and code/decode format, can not support identical conversation media attribute if find the IP-CAN carrying at two ends, then in media path, insert a medium adapter gateway MGW under the adaptive entity control of media negotiation, this medium adapter gateway MGW is used for implementing encoding and decoding conversion, user plane bearer with adaptive remote leg and access leg is connected, as shown in Figure 6:

5, after the adaptive entity of media negotiation is received SIP INVITE,, send calling SIP INVITE to the ownership IMS of called UE by S-CSCF according to the cell that carries among the SIP INVITE.

6-11, when carrying out the media negotiation of calling UE and called UE by the adaptive entity of media negotiation, code/decode format is consulted failure, then initiate SIPINVITE to the ownership IMS of called UE by the adaptive entity of media negotiation, after receiving the response 200OK that the ownership IMS of called UE returns, should respond 200OK and be transmitted to calling UE, and triggering medium adapter gateway MGW foundation is connected with calling UE and the two-way of called UE.As shown in Figure 6, the code encoding/decoding mode of medium adapter gateway MGW and calling UE is Codec A, and the code encoding/decoding mode of medium adapter gateway MGW and called UE is Codec B.So, implement encoding and decoding conversion by media negotiation adapter gateway MGW, be connected with the user plane bearer of adaptive remote leg and access leg.

Wherein, because above-mentioned medium adapter gateway MGW is by the control of the adaptive entity of media negotiation, referring to Fig. 7, the adaptive entity of media negotiation that provides for the embodiment of the invention seals in media negotiation gateway MGW in the process interface schematic diagram of medium face.Referring to as follows, with media negotiation entity and media negotiation gateway is that example describes with agreement H.248 alternately:

1, the adaptive entity of media negotiation receives SIP INVITE request, extracts and write down the SDP information of the calling UE of carrying in this request.Wherein, SDP Offer information has been used for providing this session calling UE to wish all medium types that use, and the various type of codings that these different media types are supported.

2, the media negotiation adapter gateway that is used for carrying out encoding and decoding conversion specially of selected its control of the adaptive entity of media negotiation, initiate H.248 order to this MGW, and determine the Media Stream capability set (media processing capacity of MGW comprises the coding and decoding scheme mapping) that this MGW is supported.

3, the adaptive entity of media negotiation forms SDP Offer with the Media Stream capability set, by the media negotiation of Invite request initiation with called UE.

4, called UE is returned first SDP and is replied, and wherein may refuse the medium type that some are proposed, and the tabulation of reduction encoding scheme, omits the type that can not support.Therefore the coding that has only calling UE and called UE both sides all to support is preserved.

5, the adaptive entity of media negotiation is initiated the connection attribute that MGW is revised in H.248 order, and indication MGW begins to reserve necessary resource for Media Stream.

6, the adaptive entity final decision of media negotiation is used which medium type and coding and decoding scheme for this session, and sends confirmation to called UE, points out unique a kind of encoding scheme that will adopt for each medium type in session.

7, called UE is replied, and also carries the final scheme of oneself supporting.

8, media negotiation adapter gateway MGW continues to finish resource reservation.

9, after the success of media negotiation adapter gateway MGW resource reservation, the adaptive entity of media negotiation is to called transmission UPDATE message.

10, called UE also sends 200OK message at UPDATE message to the adaptive entity of media negotiation, shows also resource reservation success of called UE.So far, medium connect foundation.

11-12, called beginning ring, the adaptive entity of media negotiation transmits bell signal to calling UE.

13-14, called subscriber's off-hook are replied, and produce 200OK message.The adaptive entity of media negotiation transmits 200OK message to calling UE.

15, the adaptive entity of media negotiation is initiated H.248 order, opens Media Stream, sets up two-way connection among the media negotiation adapter gateway MGW, and begins to charge.

Wherein, above-mentioned steps 1, SIP Invite message also may not adopt the PSI mode to the route of the adaptive entity of media negotiation, also may be by normal IMS route, promptly routes the call to the adaptive entity of media negotiation at ownership IMS network by triggering inceptive filtering condition (iFC) at S-CSCF.

Further, said process also may use at callee side, and referring to Fig. 8, the media negotiation gateway MGW that the adaptive entity of the media negotiation that is arranged in callee side that provides for the embodiment of the invention will be positioned at callee side seals in the process interface schematic diagram of medium face.Referring to as follows, with media negotiation entity and media negotiation gateway is that example describes with agreement H.248 alternately:

1, the adaptive entity of media negotiation (being arranged in callee side ownership IMS) receives the SIPINVITE request from calling UE, extracts the SDP Offer information of calling UE.Wherein, SDP offer information has been used for providing this session calling UE to wish all medium types that use and the various type of codings that these different media types are supported.

2, the media negotiation adapter gateway that is used for carrying out encoding and decoding conversion specially of selected its control of the adaptive entity of media negotiation (being arranged in callee side ownership IMS), and to this H.248 order of MGW initiation, and the Media Stream capability set that definite MGW supported (media processing capacity of MGW comprises the coding and decoding scheme mapping).

3, the adaptive entity of media negotiation forms SDP Offer with the Media Stream capability set, by the media negotiation of first SDP response message response from Calling Side.

4, the Calling Side final decision is used which medium type and coding and decoding scheme for this session, and sends confirmation to callee side, and this confirmation is used for pointing out unique a kind of encoding scheme that will adopt in session for each medium type.

6, the adaptive entity of media negotiation is replied Calling Side, also carries the final scheme that the callee side decision is supported.

7, MGW continues to finish resource reservation.

8-9, the adaptive entity of media negotiation send UPDATE message to called UE after receiving the success of Calling Side resource reservation.

The adaptive entity of 10-11, media negotiation sends 200OK message at UPDATE message to caller, shows also resource reservation success of callee side.So far, medium connect foundation.

12-13, called UE begin ring, and the adaptive entity of media negotiation transmits bell signal to calling UE.

14, the adaptive entity of media negotiation is initiated H.248 order, opens Media Stream, sets up two-way connection among the media negotiation adapter gateway MGW, and begins to charge.

15, the adaptive entity of media negotiation (for example can be MGCF) sends responds SIP 200-OK to the calling UE side.

16, after the calling UE side is received SIP 200-OK, return and confirm SIP ACK.

In sum, can further, decision handle on the adaptive entity of the media negotiation that the embodiment of the invention provides the particular type Media Stream according to being set, for example: according to different business QoS (Quality of Service, service quality) different and other information of grade, these settings include but not limited to: carrier policy, user's both caller preferences information, access network capability, access network (congested) state, media categories and the attribute information etc. of composition and each medium composition wherein.In addition, the media negotiation entity can be judged and have multiple medium composition in the call session message, and whether determine needs that this session is split into a plurality of Media Streams and extracting part branch type medium according to strategy to do medium and consult adaptive (encoding and decoding conversion), guarantee that under bearing resource (as interface-free resources) condition of limited the session of important medium type is set up.

In sum, what the embodiment of the invention provided carries out the method for adaptation processing to media negotiation, all to anchor to the adaptive entity of media negotiation of this user attaching IMS network by calling to Client-initiated or reception, thereby trigger by the adaptive entity agency of this media negotiation and carry out the adaptive process of media negotiation, guarantee media negotiation success between the different grouping access network under the isomerous environment, and then finish and call out continuously, and then improve customer service and experience, strengthen professional impression.

Embodiment 1 at calling UE when IMS makes a call, the method of media negotiation being carried out adaptation processing is illustrated, embodiment 2 will be under the situation about making a call from the CS territory when calling UE, and the method for media negotiation being carried out adaptation processing is illustrated, and sees embodiment 2 for details:

Embodiment 2

The situation that the user makes a call from the CS territory, referring to Fig. 9, user's face schematic diagram that the user who provides for the embodiment of the invention 1 makes a call from the CS territory.As shown in Figure 9, user UE (UE-CS, this user is arranged in the CS territory), the entity that participates in mainly comprises: the ownership IMS adaptive entity of media negotiation (AS for negotiation) that increases newly down that is positioned at IMS AS, MGW under the ownership IMS of the VMSC (Visited Mobile Services Center, visitor mobile switch center) in user UE visit CS territory, the MGCF, the S-CSCF that are positioned at user UE ownership place IMS, this user UE and this user UE.Referring to Figure 10, for user under this mode during from situation that the CS territory makes a call, what the embodiment of the invention provided carries out the method flow schematic diagram of adaptation processing to media negotiation,

301: user UE calls out in Legacy GERAN/UTRAN CS territory initiation session.

302:VMSC (Visited Mobile Services Center, visitor mobile switch center) receive user's conference call after, adopt CAMEL (Customised Applications for Mobile Network Enhanced Logic, the customization application that the mobile network enhancing is professional) mode of changed course routes the call to the adaptive entity of media negotiation that user UE belongs to the IMS network.

Wherein, so-called VMSC adopts CAMEL to alter course and is meant that the CAMEL business procedure that is adopted can be the PSI of the adaptive entity of media negotiation of ownership IMS with user's call re-direction.

303: the adaptive entity of media negotiation is received the conference call that route is come, and proxy user UE and called subscriber UE carry out the negotiation of medium type and code/decode format.

Wherein, if the loading end at two ends can both be supported the conversation media attribute that negotiates, then set up carrying end to end and connect.

Further, carry out in the negotiations process of medium type and code/decode format at media negotiation adaptive entity proxy user UE and called subscriber UE, can't be successful if consult, further comprising the steps of:

304: in media path, insert a media negotiation adapter gateway MGW under the adaptive entity control of media negotiation.

305: media negotiation adapter gateway MGW implements encoding and decoding conversion, is connected with the user plane bearer of adaptive remote leg and access leg.

Referring to Figure 11, user's face schematic diagram of the insertion medium adapter gateway MGW that provides for the embodiment of the invention 2.Wherein, can adopt between adaptive entity of media negotiation and media negotiation adapter gateway but be not limited to H.248 or megaco protocol communicates, also can adopt other internal interface communication protocol.Wherein, the media negotiation adapter gateway MGW provide media bearer and encoding and decoding conversion function, because this media negotiation adapter gateway MGW is a logical functional entity, during specific implementation, can finish this function by media negotiation adapter gateway MGW entity is set separately, further, in order to economize on resources, this above-mentioned logic function can also be arranged on other existing in IMS network MGW, establish realization by closing with this existing MGW, present embodiment is not done any restriction to this.

Referring to Figure 12, for the mutual schematic diagram of flow process is set up in the session that the embodiment of the invention 2 provides, as shown in figure 12:

1, the calling UE Setup that makes a call in the CS territory, wherein, this Setup is based on VDN (Virtual Deviece Network, virtual unit network).

2, after VMSC receives the calling Setup of calling UE transmission,, finish by the route number of the changing process of CS territory to IMS by the CAMEL number of changing.

3, VMSC sends IAM message to MGCF, carries the PSI sign in this IAM message.

4, after MGCF receives IAM message, send the SIP INVITE, carry the PSI sign in this SIP INVITE to P-CSCF/I-CSCF.

5, after P-CSCF/I-CSCF receives the SIP INVITE,, transmit the SIP INVITE to the adaptive entity of the media negotiation corresponding with this PSI number according to the PSI number that this SIP INVITE carries.

6, after the adaptive entity of media negotiation is received the SIP INVITE, extract SDP medium property information.

By step 7 and subsequent step, after adaptive entity has been finished the media negotiation of calling UE and called UE by media negotiation, set up the VoIP voice call that is carried on IMS between calling UE and the called UE.

Referring to Figure 13, for the mutual schematic diagram of failure handling process is set up in the session that the embodiment of the invention 2 provides, when the adaptive entity of media negotiation is acted on behalf of calling UE and called UE and is carried out the negotiation of medium type and code/decode format, can not support identical conversation media attribute if find the IP-CAN carrying at two ends, then in media path, insert a medium adapter gateway MGW under the adaptive entity control of media negotiation, this medium adapter gateway MGW is used for implementing encoding and decoding conversion, user plane bearer with adaptive remote leg and access leg is connected, as shown in figure 13:

3, VMSC sends IAM message to MGCF, carries the PSI sign in this IAM message.

7, when carrying out the media negotiation of calling UE and called UE by the adaptive entity of media negotiation, code/decode format is consulted failure, then initiate SIP INVITE to the ownership IMS of called UE by the adaptive entity of media negotiation, after receiving the response 200OK that the ownership IMS of called UE returns, should respond 200OK and be transmitted to MGCF, and triggering medium adapter gateway MGW foundation is connected with calling UE and the two-way of called UE.Wherein, the encoding and decoding conversion that this situation medium adapter gateway MGW is finished under the adaptive entity control of media negotiation is connected with the user plane bearer of adaptive remote leg and access leg, can finish at the ownership IMS of Calling Side, also can finish at the ownership IMS of callee side, methods are similar to Example 1, repeat no more.

In sum, can further, decision handle on the adaptive entity of the media negotiation that the embodiment of the invention provides the particular type Media Stream according to being set, for example: according to different and other information of different business QoS grade), these settings include but not limited to: carrier policy, user's both caller preferences information, access network capability, access network (congested) state, media categories and the attribute information etc. of composition and each medium composition wherein.

The media negotiation entity can be judged and have multiple medium composition in the call session message, and whether determine needs that this session is split into a plurality of Media Streams and extracting part branch type medium according to strategy to do medium and consult adaptive (encoding and decoding conversion), guarantee that under bearing resource (as interface-free resources) condition of limited the session of important medium type is set up.

It should be noted that especially, for PLMN (public land mobile network, public land route mobile network)/PSTN (Public Switched Telephone Network, PSTN) calling of user UE initiation, also can not need to use the media negotiation adaption function, but adopt following method: at first also will be through the IMS network of UE home domain, according to the routing mechanism from CS to IMS, be routed to suitable MGCF (Media Gateway Control Function, MGCF).Wherein, on the one hand, from the PLMN/PSTN angle, MGCF is equivalent to the MSC or the end office switch in caller visit CS territory, also is simultaneously the entry gateway of ownership IMS; On the other hand, from the viewpoint of ownership IMS, MGCF is equivalent to provide for visited network the S-CSCF of service, and MGCF belongs to ownership IMS network.Secondly, by network topological information in the IMS and static configuration relation, MGCF can obtain the address of an I-CSCF, is the S-CSCF address that the calling subscriber provides service with the inquiry.In fact MGCF can be responsible for the intercommunication from PLMN/PSTN to IMS and control the conversion that MGW realizes the medium aspect, can comprise the encoding and decoding adaption function.Therefore, above-mentioned MGCF is a gateway of realizing IMS and CS/PSTN network interconnection intercommunication, and all call signalings of crossing over IMS network and CS/PSTN network all will pass through MGCF.Wherein, mapping of BICC in MGCF imputability SIP and the CS/PSTN network or the agreement between the ISUP and conversion; MGCF can finish the real-time conversion of CS/PSTN and IMS network user's load plane media content and necessary code/decode format conversion by control IM-MGW.MGCF can generate and charge relevant information and be sent to CCF.Wherein, above-mentioned IM-MSW is mainly used in the conversion between IMS user's face IP carrying and the CS/PSTN media link, and IM-MSW can finish the carrying establishment of connection/release and the mapping of intercommunication both sides and handle according to the control command from MGCF; IM-MSW can also be according to the control command from MGCF, and the special resource of control user face is handled, and comprises processing such as the conversion (as AMR and the G.711 conversion of audio coding decoding form) of code/decode format and echo inhibition.

To sum up, to mode one relate to for the network of having disposed IMS, the calling of Client-initiated or reception all will anchor to the adaptive entity of media negotiation of this user attaching IMS network, carries out the adaptive process of media negotiation by the adaptive entity agency of this media negotiation and is described thereby trigger.Below at mode two related for the network of having disposed IMS, only behind calling UE and the called UE media negotiation failure first time, just adopt the media negotiation adaptive entity of the mode of PSI to this user attaching IMS network, carry out being described of the adaptive process of media negotiation thereby trigger, see for details as follows by the adaptive entity agency of this media negotiation:

Embodiment 3

Present embodiment is at for the network of having disposed IMS, only behind user and the called subscriber's media negotiation failure first time, the mode that just adopts PSI is to the adaptive entity of media negotiation of this user attaching IMS network, carries out the adaptive process of media negotiation by the adaptive entity agency of this media negotiation and describes thereby trigger.

Wherein, so-called public service identity PSI is professional URI sign, can business of unique representative, and be in charge of by AS, and do not need registration before use, can uniquely determine the adaptive entity of media negotiation by this PSI.Referring to Figure 14, under this mode that provides for the embodiment of the invention, media negotiation is carried out the method flow schematic diagram of adaptation processing.

401: user UE obtains the PSI number.Wherein, the mode of obtaining the PSI number of calling UE comprises following two kinds at least:

One, at user UE for the first time with called when carrying out media negotiation, if media negotiation failure, ownership IMS network side can return failure response to user UE, carry the PSI number of the adaptive entity of media negotiation in this failure response, so calling UE is obtained the PSI number of the adaptive entity of media negotiation from the failure response that returns.

For example, particular media type and coding and decoding scheme that the P-CSCF of callee side IMS network and S-CSCF refusal caller SDP propose (can be because the strategy of operator, a possible reason is medium type or the unknown encoding scheme that operator does not allow to use any the unknown, because network may charge to these medium), if P-CSCF/S-CSCF finds SDP and has comprised unsupported medium type or encoding scheme in proposing, P-CSCF/S-CSCF will use 488 (not accepting) response message to refuse this request herein, Calling Side UE can obtain the PSI number of the adaptive entity of this media negotiation from 488 message of returning, wherein, this PSI number is by the S-CSCF insertion of UE ownership IMS;

Two, this PSI number configured in advance is in UE.So, at user UE for the first time with called when carrying out media negotiation, if media negotiation failure then can directly get access to this PSI number.

402: after the normal negotiations failure first time, user UE uses the PSI number, and the S-CSCF by user UE ownership IMS is routed to the adaptive entity of media negotiation with call signaling.

Wherein, after S-CSCF receives the call request signaling that the user sends, can adopt following mode to realize, this call signaling is routed to the adaptive entity of media negotiation, see for details as follows:

One, after S-CSCF receives this call request signaling, resolve address to the PSI that carries in this call request signaling, if PSI and calling subscriber UE are at same IMS, carrier policy configuration according to this territory, can directly obtain the AS address at PSI place, then this call request signaling is transmitted to the AS of the AS address correspondence that obtains.

Two, after S-CSCF receives this call request signaling,, obtain the inlet I-CSCF address of PSI home domain by address resolution to PSI.Be accomplished to the route of PSI place application server (being the adaptive entity of media negotiation) then by I-CSCF.Wherein, the route that is accomplished to the adaptive entity of media negotiation by I-CSCF can realize in the following manner:

1) I-CSCF is by inquiry DNS (Domain Name System, domain name system), obtain the address of PSI place application server (the adaptive entity of media negotiation), and after obtaining the adaptive physical address of this media negotiation, call request is forwarded to the adaptive entity of the media negotiation corresponding with this address.

2) I-CSCF is by inquiry HSS (Home Subscriber Server, home subscriber server), obtain the address of PSI place application server (the adaptive entity of media negotiation), and after obtaining the adaptive physical address of this media negotiation, call request is forwarded to the adaptive entity of the media negotiation corresponding with this address.

3) the PSI home network distributes the S-CSCF of an acquiescence to PSI, wherein, the relations of distribution are kept among the HSS, I-CSCF is by inquiry HSS, obtain S-CSCF address for this PSI distribution, and call request is forwarded to the S-CSCF of this S-CSCF address correspondence, further call request is routed to the adaptive entity of media negotiation at PSI place then by this S-CSCF.

403: the adaptive entity of media negotiation extracts its medium property information SDP offer after receiving call request signaling from UE, inserts a medium adapter gateway MGW under the adaptive entity control of media negotiation in media path.

404: medium adapter gateway MGW implements encoding and decoding conversion, is connected with the user plane bearer of adaptive remote leg and access leg.

Wherein, the method that present embodiment provides is applicable to that calling UE directly inserts from IMS, and calling UE inserts two kinds of situations of IMS from the CS territory, and situation and the foregoing description 1,2 are similar, repeat no more herein.

Wherein, the method that present embodiment provides is applicable to that calling UE ownership IMS finishes, and called UE ownership IMS finishes, and situation and the foregoing description 1,2 are similar, repeat no more herein.

In sum, what the embodiment of the invention provided carries out the method for adaptation processing to media negotiation, by user and called subscriber for the first time behind the media negotiation failure, just adopt the media negotiation adaptive entity of the mode of PSI to this user attaching IMS network, thereby trigger by the adaptive entity agency of this media negotiation and carry out the adaptive process of media negotiation, guarantee media negotiation success between the different grouping access network under the isomerous environment, and then finish and call out continuously, and then improve customer service and experience, strengthen professional impression.

The method that media negotiation is carried out adaptation processing that provides of each embodiment is to finish the adaptive of encoding and decoding by inserting the specialized media gateway based on the IMS framework under the control of business domains in the call establishment in sum, the inventor has also proposed outlet gateway (such as the PDN-GW of LTE/SAE or the GGSN of UMTS) at the IP access network, and to finish the encoding and decoding of up-downgoing adaptive, sees following embodiment for details:

Embodiment 4

Referring to Figure 15, the media negotiation that provides for the embodiment of the invention carries out the method for adaptation processing and handles mutual schematic diagram, as shown in figure 15, after calling UE and called UE code/decode format are consulted failure, not refusing session sets up, but by PCC (Policy and Charging Control, policy control and charging) the IMS server (specifically being P-CSCF in IMS) of mechanism carries out encoding and decoding conversion by S-CSCF notice PDN GW, set up the required carrying of the code/decode format of supporting between PDN GW and the calling UE, and indication PDN GW will carry out the conversion of encoding and decoding to this session, and the indication calling UE makes a call once more in response, this P-CSCF encoding and decoding indication to PDN-GW in the PCC process may derive from the indication that failure back S-CSCF makes P-CSCF in failure response message, require the follow-up encoding and decoding conversion of carrying out of P-CSCF indication PDN-GW.Make a call for the second time and finish corresponding conversion by PDN-GW when setting up, and set up the required carrying of code/decode format that both sides support, after the two ends carrying is all set up successfully, the conversation beginning.

The inventive method is followed the principle of IMS session by home domain control, i.e. all sessions that relate to certain user all will provide service for it by the registration S-CSCF of its home domain.Home domain control can reinforcement operator by the IMS session is to network and the control user, and registration, roaming and the business of especially strengthening charging, service quality, user such as provides at management.

Those skilled in the art can know that on the one hand, the operation of the 2G/3G CS domain core net MSC/VLR that relates in the method that the invention described above embodiment provides also is applicable to CDMA 1xRTT domain core net 1xRTTMSC/VLR.On the other hand, the related IP-CAN of the embodiment of the invention mainly is the LTE/SAE gruping insertion network, in fact also is easy to spread to IP access networks such as being adapted to HSPA, WiMAX, 3GPP2, UMB.The embodiment of the invention is supported IP access way independence, also be applicable to access waies such as ADSL (ADSL (Asymmetric Digital Subscriber Line)), HFC (hybrid fiber coax), CableModem (cable modem) and WLAN, and other can be by the central controlled fixed network access way of IMS etc., include but not limited to the mobile subscriber, promptly except supporting the access of above-mentioned wireless mode, equally also be applicable to the user by ADSL etc. fixedly access way be linked into the 2G/3G circuit domain, provide prerequisite for the fixing voip solution that merges that moves is provided.

Therefore, method that the embodiment of the invention provides solves existing media negotiation mechanism can't be guaranteed under the isomerous environment between the different grouping access network media negotiation success and then finish and call out continuous problem, thereby has improved customer service experience, has strengthened professional impression.

Embodiment 5

Referring to Figure 16, the embodiment of the invention provides a kind of media negotiation has been carried out the system of adaptation processing, and system comprises: the adaptive entity 1601 of media negotiation, media negotiation adapter gateway 1602, wherein,

The adaptive entity 1601 of media negotiation is used for when calling terminal and terminal called media negotiation failure, is controlled in the media path of calling terminal and terminal called and inserts media negotiation adapter gateway 1602;

Media negotiation adapter gateway 1602 is used to obtain the medium property information of calling terminal support, the medium property information that terminal called is supported; According to the medium property information of calling terminal support, the medium property information that terminal called is supported, the media negotiation of finishing calling terminal and terminal called is adaptive.

Wherein, the adaptive entity 1601 of media negotiation specifically is used for after calling terminal sends call request, and described calling terminal is acted on behalf of in this call request that the reception route is come and described terminal called carries out media negotiation; When calling terminal and terminal called media negotiation failure, be used for being controlled at the media path insertion media negotiation adapter gateway 1602 of calling terminal and terminal called; Perhaps,

The adaptive entity 1601 of media negotiation, specifically be used for when calling terminal and terminal called media negotiation failure, receive the calling terminal that route comes and send call request, and be controlled in the media path of calling terminal and terminal called and insert media negotiation adapter gateway 1602.

Wherein, calling terminal is positioned at IP Multimedia System IMS; Or; Calling terminal is positioned at circuit CS territory.

Wherein, when calling terminal is positioned at circuit CS territory, the system that present embodiment provides also comprises: visitor mobile switch center VMSC, this visitor mobile switch center VMSC, be used to receive the calling sent by calling terminal request, call request be routed to the adaptive entity 1601 of media negotiation of the ownership place IP Multimedia System IMS of calling terminal by the number of changing.

In sum, the system that the embodiment of the invention provides guarantees media negotiation success between the different grouping access network, finishes and calls out continuously, and then improve customer service and experience, and strengthens professional impression.

Embodiment 6

Referring to Figure 17, the embodiment of the invention provides a kind of media negotiation adaptive entity, the adaptive entity of described media negotiation:

Receiver module 1701 is used to know calling terminal and terminal called media negotiation failure;

Control module 1702, the media path that is used for being controlled at calling terminal and terminal called inserts the media negotiation adapter gateway; Wherein, the media negotiation adapter gateway is used for the medium property information of supporting according to calling terminal, the medium property information that terminal called is supported, the media negotiation of finishing calling terminal and terminal called is adaptive.

Wherein, the adaptive entity of media negotiation also comprises first routing module, is used for receiving the call request that route is come after calling terminal sends call request;

The secondary route module is used for receiving the call request that route is come when calling terminal and terminal called media negotiation failure.

Wherein, when calling terminal is positioned at circuit CS territory, first routing module, after the visitor mobile switch center VMSC that specifically is used to receive calling terminal receives that calling terminal sends call request, the call request route that sends by the number of changing.

Wherein, the secondary route module specifically is used for body and comprises the PSI number of reception according to calling terminal, the S-CSCF of the ownership IMS by calling terminal, the call request of transmission.

Wherein, the adaptive entity of media negotiation is arranged in the home IP multimedia subsystem, IMS of calling terminal, and correspondingly, the media negotiation adapter gateway is arranged in the ownership IMS of calling terminal;

Perhaps, the adaptive entity of media negotiation is arranged in the ownership IMS of terminal called, correspondingly,, the media negotiation adapter gateway is arranged in the ownership IMS of terminal called.

In sum, the adaptive entity of the media negotiation that the embodiment of the invention provides can be guaranteed media negotiation success between the different grouping access network, finishes and calls out continuously, and then improve customer service and experience, and strengthens professional impression.

Embodiment 7

Referring to Figure 18, the embodiment of the invention provides a kind of media negotiation adapter gateway, this media negotiation adapter gateway is for working as calling terminal and terminal called media negotiation failure, be inserted under the control of the adaptive entity of media negotiation in the media path of calling terminal and terminal called, the media negotiation adapter gateway comprises:

Acquisition module 1801 is used to obtain the medium property information of calling terminal support, the medium property information that terminal called is supported;

Adaptation module 1802 is used for the medium property information of supporting according to calling terminal, the medium property information that terminal called is supported, the media negotiation of finishing calling terminal and terminal called is adaptive.

In sum, the media negotiation adapter gateway that the embodiment of the invention provides can be guaranteed media negotiation success between the different grouping access network, finishes and calls out continuously, and then improve customer service and experience, and strengthens professional impression.

Embodiment 8

Referring to Figure 19, the embodiment of the invention provides a kind of media negotiation has been carried out the system of adaptation processing, and system also comprises: the outlet gateway 1902 of calling terminal 1901 and IP access network, wherein,

Calling terminal 1901 is used for receiving the notice of the indication request of making a call once more when calling terminal 1901 and terminal called media negotiation failure; According to notice, send call request for the second time to the outlet gateway;

The outlet gateway 1902 of IP access network is used for when calling terminal 1901 and terminal called media negotiation failure, receives and carries out the adaptive notice of media negotiation; After receiving notice, also be used to receive the call request second time that calling terminal 1901 sends, according to the medium property information of calling terminal 1901 supports, the medium property information that terminal called is supported, the media negotiation of finishing calling terminal 1901 and terminal called is adaptive.

Further, this system also comprises S-CSCF, P-CSCF, wherein,

S-CSCF is used for when calling terminal 1901 and terminal called media negotiation failure, and it is adaptive that S-CSCF requires the outlet gateway 1902 of P-CSCF notice IP access network to carry out media negotiation in failure response;

P-CSCF is used to receive the failure response that S-CSCF sends, and it is adaptive that the outlet gateway 1902 of notice IP access network carries out media negotiation.

In sum, the system that the embodiment of the invention provides by the outlet gateway of IP access network, can guarantee media negotiation success between the different grouping access network, finishes and calls out continuously, and then improve customer service and experience, and strengthens professional impression.

Embodiment 9

Referring to Figure 20, the embodiment of the invention provides a kind of outlet gateway of IP access network, and this outlet gateway comprises:

Receiver module 2001 is used for when calling terminal and terminal called media negotiation failure, receives and carries out the adaptive notice of media negotiation;

Processing module 2002, be used for after receiving described notice, receive of the second time call request that notice sent of described calling terminal according to the indication request of making a call once more, according to the medium property information of calling terminal support, the medium property information that terminal called is supported, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

In sum, the outlet gateway of the IP access network that the embodiment of the invention provides can be guaranteed media negotiation success between the different grouping access network, finishes and calls out continuously, and then improve customer service and experience, and strengthens professional impression.

The technical scheme that the embodiment of the invention provides is owing to guarantee media negotiation success between the different grouping access network, finish and call out continuously, can also solve with the similar 3GPP Rel-8 of VCC in relate to MMSC (Multi-Media Session Continuity, the multimedia call continuity) under the application scenarios, if remote leg media negotiation failure then the problem that causes the territory to be switched abandoning, experience thereby improve customer service, strengthen professional impression.And can also solve with the similar GPP Rel-8 of VCC in also relate to SRVCC (Single Radio Voice Call Continuity, voice continuity between single-receiver IMS and the CS) under the application scenarios, need finish the remote leg media negotiation just can finish in the normal switching flow of SRVCC, solution is at IMSAS (Application Server, application server) and called subscriber when carrying out the remote leg media negotiation, if remote leg media negotiation failure then can cause called connection failure equally, cause to finish the problem of the normal switching flow of SRVCC, experience thereby improve customer service, strengthen professional impression.

" reception " speech in the embodiment of the invention can be understood as and initiatively obtains from other modules also can be to receive the information that other modules are sent.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.

The invention described above embodiment sequence number is not represented the quality of embodiment just to description.

Part steps in the embodiment of the invention can utilize software to realize that corresponding software programs can be stored in the storage medium that can read, as CD or hard disk etc.

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 done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. one kind is carried out the method for adaptation processing to media negotiation, it is characterized in that described method comprises:

2. the method for claim 1 is characterized in that, and is described when calling terminal and terminal called media negotiation failure, and the adaptive entity of media negotiation is controlled in the media path of described calling terminal and described terminal called and inserts the media negotiation adapter gateway, comprising:

The call request that the described calling terminal that the adaptive entity reception of media negotiation route is come is initiated; The adaptive entity of described media negotiation acts on behalf of described calling terminal and described terminal called carries out media negotiation; When described calling terminal and terminal called media negotiation failure, the adaptive entity of described media negotiation is controlled at and inserts the media negotiation adapter gateway in the media path of described calling terminal and described terminal called;

Perhaps,

Behind described calling terminal and terminal called media negotiation failure, the call request that the described calling terminal that the adaptive entity reception of media negotiation route is come is initiated; The adaptive entity of described media negotiation is controlled at and inserts the media negotiation adapter gateway in the media path of described calling terminal and described terminal called.

3. method as claimed in claim 2 is characterized in that, when described calling terminal was positioned at 2G/3G circuit domain core net service range, the call request that the calling terminal that the adaptive entity reception of described media negotiation route is come is initiated comprised:

The adaptive entity of described media negotiation receive visitor mobile switch center VMSC from described calling terminal by the intelligent network business number of the changing way of escape by the calling sent by calling terminal request of coming, the adaptive entity of described media negotiation is arranged in the ownership place IP Multimedia System IMS of described calling terminal.

4. method as claimed in claim 2 is characterized in that, and is described behind described calling terminal and terminal called media negotiation failure, and the call request that the described calling terminal that the adaptive entity reception of media negotiation route is come is initiated comprises:

The adaptive entity of media negotiation receives the public service identity PSI number according to described calling terminal by the service call conversation controller S-CSCF of the ownership place IMS of calling terminal, the call request that route sends.

5. method as claimed in claim 4 is characterized in that, the S-CSCF of the ownership place IMS by described calling terminal is routed to the adaptive entity of media negotiation with call request, comprising:

The request of described S-CSCF receipt of call is to the address resolution of the PSI number that carries in the described call request;

If described PS I and described calling terminal in same ownership place IMS service range, then according to the carrier policy configuration in this territory, directly obtain the adaptive entity of media negotiation of described PSI number correspondence;

Described call request is transmitted to the adaptive entity of described media negotiation;

Perhaps,

The request of described S-CSCF receipt of call to the address resolution of described PSI number, obtains the inlet query call conversation controller I-CSCF address of PSI home domain;

Be accomplished to the route of the adaptive entity of media negotiation of described PSI correspondence by described I-CSCF, call request is routed to the adaptive entity of described media negotiation.

6. method as claimed in claim 5 is characterized in that, describedly is accomplished to the route of the adaptive entity of media negotiation of described PSI correspondence by described I-CSCF, and call request is routed to the adaptive entity of described media negotiation, comprising:

Described I-CSCF obtains the address of the adaptive entity of media negotiation of PSI number correspondence by the DNS of nslookup system;

Described I-CSCF is forwarded to the media negotiation adaptive entity corresponding with the adaptive physical address of described media negotiation to described call request after obtaining the adaptive physical address of described media negotiation;

Perhaps,

Described I-CSCF obtains the address of the adaptive entity of media negotiation of PSI number correspondence by inquiry home subscriber server HSS;

Described I-CSCF is forwarded to the media negotiation adaptive entity corresponding with the adaptive physical address of described media negotiation to described call request after obtaining the adaptive physical address of described media negotiation; Perhaps,

Described I-CSCF obtains the S-CSCF address of distributing into described PSI by the described HSS of inquiry; Wherein, prestore among the described HSS mapping relations of PSI and default S-CSCF address;

Call request is forwarded to the S-CSCF of the described S-CSCF address correspondence that obtains;

Described S-CSCF is routed to call request the adaptive entity of media negotiation of described PSI number correspondence.

7. the method for claim 1 is characterized in that, the adaptive entity of described media negotiation is arranged in the home IP multimedia subsystem, IMS of described calling terminal, and correspondingly, described media negotiation adapter gateway is arranged in the ownership IMS of described calling terminal;

Perhaps, the adaptive entity of described media negotiation is arranged in the ownership IMS of described terminal called, and correspondingly, described media negotiation adapter gateway is arranged in the ownership IMS of described terminal called.

8. as the described method of the arbitrary claim of claim 1-7, it is characterized in that the adaptive entity of described media negotiation is controlled at and inserts the media negotiation adapter gateway in the media path of described calling terminal and described terminal called, comprising:

The adaptive entity selection media negotiation of described media negotiation adapter gateway;

Adaptive entity of described media negotiation and described called terminal side are carried out media negotiation;

The adaptive entity of described media negotiation notifies described media negotiation adapter gateway to open Media Stream, is implemented in and inserts the media negotiation adapter gateway in the media path of described calling terminal and described terminal called.

9. method as claimed in claim 8 is characterized in that, the adaptive entity selection media negotiation of described media negotiation adapter gateway; Adaptive entity of described media negotiation and described called terminal side are carried out media negotiation; The adaptive entity of described media negotiation notifies described media negotiation adapter gateway to open Media Stream, is implemented in to insert the media negotiation adapter gateway in the media path of described calling terminal and described terminal called, comprising:

The adaptive entity selection media negotiation of described media negotiation adapter gateway, and obtain the Media Stream capability set of being supported of described media negotiation adapter gateway;

The adaptive entity of described media negotiation carries out media negotiation according to described Media Stream capability set and described called terminal side, consults the type of coding that back described media negotiation adapter gateway of reservation and described called terminal side are all supported;

The adaptive entity of described media negotiation is revised the connection attribute of described media negotiation adapter gateway, and to indicate described media negotiation adapter gateway be the Media Stream reserved resource;

After described media negotiation adapter gateway resource reservation success, the adaptive entity of described media negotiation sends updating message to described called terminal side, after receiving the renewal response that described called terminal side is returned, notify described media negotiation adapter gateway to open Media Stream, be implemented in and insert the media negotiation adapter gateway in the media path of described calling terminal and described terminal called.

10. one kind is carried out the method for adaptation processing to media negotiation, it is characterized in that described method comprises:

When calling terminal and terminal called media negotiation failure, it is adaptive that the outlet gateway of notice IP access network carries out media negotiation, and notify the request that makes a call once more of described calling terminal, the outlet gateway that makes described IP access network is according to the medium property information of described calling terminal support and the medium property information of terminal called support, and the media negotiation of finishing described calling terminal and described terminal called is adaptive.

11. method as claimed in claim 10 is characterized in that: it is adaptive that the outlet gateway of described notice IP access network carries out media negotiation, and after notifying the request of making a call once more of described calling terminal, described method also comprises:

Described terminal sends call request for the second time according to the notice of the request of making a call once more of receiving;

After the outlet gateway of described IP access network receives the call request second time of described calling terminal transmission, according to the medium property information that the medium property information and the terminal called of calling terminal support are supported, the media negotiation of finishing described calling terminal and described terminal called is adaptive.

12., it is characterized in that described when calling terminal and terminal called media negotiation failure, it is adaptive that the outlet gateway of notice IP access network carries out media negotiation, comprising as claim 10 or 11 described methods:

When calling terminal and terminal called media negotiation failure, it is adaptive that S-CSCF requires the outlet gateway of agent call conversation controller P-CSCF notice IP access network to carry out media negotiation in failure response.

13. one kind is carried out the system of adaptation processing to media negotiation, it is characterized in that described system comprises: the adaptive entity of media negotiation, media negotiation adapter gateway, wherein,

The adaptive entity of described media negotiation is used for when calling terminal and terminal called media negotiation failure, is controlled in the media path of described calling terminal and described terminal called and inserts described media negotiation adapter gateway;

14. system as claimed in claim 13, it is characterized in that, the adaptive entity of described media negotiation, specifically be used for after calling terminal sends call request, receive the described call request that route is come, act on behalf of described calling terminal and described terminal called carries out media negotiation, when described calling terminal and terminal called media negotiation failure, the media path that is used for being controlled at described calling terminal and described terminal called inserts the media negotiation adapter gateway; Perhaps,

The adaptive entity of described media negotiation, specifically be used for behind described calling terminal and terminal called media negotiation failure, receive the calling sent by calling terminal request that route is come, and be controlled in the media path of described calling terminal and described terminal called and insert the media negotiation adapter gateway.

15. system as claimed in claim 13 is characterized in that, when described calling terminal was positioned at circuit CS territory, described system also comprised: visitor mobile switch center VMSC,

Described visitor mobile switch center VMSC is used to receive described calling sent by calling terminal request, described call request is routed to the adaptive entity of media negotiation of the ownership place IP Multimedia System IMS of described calling terminal by the number of changing.

16. one kind is carried out the system of adaptation processing to media negotiation, it is characterized in that described system comprises: the outlet gateway of calling terminal and IP access network,

17. system as claimed in claim 16 is characterized in that, described system also comprises S-CSCF, P-CSCF, wherein,

Described S-CSCF is used for when calling terminal and terminal called media negotiation failure, and it is adaptive that S-CSCF requires the outlet gateway of P-CSCF notice IP access network to carry out media negotiation in failure response;

Described P-CSCF is used to receive the failure response that described S-CSCF sends, and it is adaptive that the outlet gateway of notice IP access network carries out media negotiation.

18. the adaptive entity of media negotiation is characterized in that, the adaptive entity of described media negotiation comprises:

19. entity as claimed in claim 18 is characterized in that, the adaptive entity of described media negotiation also comprises,

First routing module is used for receiving the described call request that route is come after calling terminal sends call request;

The secondary route module is used for receiving the described call request that route is come when described calling terminal and terminal called media negotiation failure.

20. as claim 18 or 19 described entities, it is characterized in that, when described calling terminal is positioned at circuit CS territory, described first routing module, after the visitor mobile switch center VMSC that specifically is used to receive described calling terminal receives that described calling terminal sends call request, the described call request route that sends by the number of changing.

21. entity as claimed in claim 19 is characterized in that, described secondary route module specifically is used to receive the PSI number according to described calling terminal, the S-CSCF of the ownership IMS by described calling terminal, the described call request of transmission.

22. a media negotiation adapter gateway is characterized in that, described media negotiation adapter gateway comprises:

23. entity as claimed in claim 22 is characterized in that, the adaptive entity of described media negotiation is arranged in the home IP multimedia subsystem, IMS of described calling terminal, and correspondingly, described media negotiation adapter gateway is arranged in the ownership IMS of described calling terminal;

Perhaps, the adaptive entity of described media negotiation is arranged in the ownership IMS of described terminal called, correspondingly,, described media negotiation adapter gateway is arranged in the ownership IMS of described terminal called.

24. the outlet gateway of an IP access network is characterized in that, described outlet gateway comprises: