CN101141807B - Coding/decoding negotiation method - Google Patents
Coding/decoding negotiation method Download PDFInfo
- Publication number
- CN101141807B CN101141807B CN2007101484242A CN200710148424A CN101141807B CN 101141807 B CN101141807 B CN 101141807B CN 2007101484242 A CN2007101484242 A CN 2007101484242A CN 200710148424 A CN200710148424 A CN 200710148424A CN 101141807 B CN101141807 B CN 101141807B
- Authority
- CN
- China
- Prior art keywords
- coding
- decoding capability
- msce
- decoding
- subscriber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention provides a decoding consultation method, which is applied in the mobile communication field. The method of the invention is that under the condition that in the exiting technology the coding and the decoding has no intersection exists between the incoming users of the SIP, namely the session initiation protocol incoming through the MSCe, namely, the mobile exchange simulation transfer outgoing user, and the calling can't be continued, and the called is improved to be performed through the MSCe and transferred to another SIP user, besides the calling user bearing capacity, media gateway bearing capacity is increased to the media description information in the calling establishment information, therefore the called user has more selections and the bearing capacity consultation failure is reduced, and the problem the supporting coding and the decoding are inconsistent between the users in the access CDMA2000 system therefore to cause that the calling can't be continued is realized, and the system compatibility is enhanced.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to a kind of coding/decoding negotiation method.
Background technology
The CDMA2000 technology has obtained great success in field of mobile communication, whole world CDMA2000 commercialization network is more prevalent, at present traditional MS is that portable terminal or LMSD (Legacy MS Domain) are the conventional terminal territory stage, core network is based on calling out control and carrying separation principle, replacing TDM with the Packet Based Network technology is the time division multiplexing technology, is traditional MSC that the circuit domain core network element is separated into the promptly mobile exchange emulation of MSCe and MGW is a media gateway, two functional entitys, MSCe provides and calls out control and mobile management function, and MGW provides media bearer and encoding and decoding conversion function.
TrFO (Transcoder Free Operation) does not promptly have the voice call of encoding and decoding conversion, be when call setup, mode by the out-of-band signalling negotiation, optimizing code and decode type between two end nodes, on the bearer path of Packet Based Network, transmit compressed voice, thereby improve the service quality and the conserve bandwidth of system by removing codec from.RTO (Remote Transcoder Operation) i.e. is TC back-to-back, is a kind of mechanism that increases a kind of vocoder of configuration in core net to call, and RTO is the special case of TrFO.
In the X.S0025 agreement, be that conversation initialized protocol inserts, again through the out calling of SIP switching, the complete transparent transmission of media information for calling out by SIP (Session Initial Protocal).Its advantage is need not prepare medium in present networks, saves the resource of network.
In the prior art, if the bear format that two sip users are supported has common factor, then its call establishment may further comprise the steps as shown in Figure 3:
Step 301, sip user A makes a call to MSCe and sets up message, and wherein media description information is SDP-A, and its bearing capacity is Φ 1;
Step 302, MSCe sends to sip user B with call setup message, and wherein media description information is SDP-Am, and its bearing capacity is Φ 1m=Φ 1 ∪ Φ m for Φ 1m; Φ m represents that MGW is the code/decode format set that media gateway is supported;
Step 303, sip user B sends ALERTING message to MSCe;
Step 304, MSCe sends to sip user A with ALERTING message, and wherein media description information is SDP-B, and its bearing capacity is Φ 2;
Step 305, sip user B sends connection message to MSCe;
Step 306, MSCe sends connection message to sip user A;
Step 307, sip user A sends CONNect Acknowledgement message to MSCe;
Step 308, MSCe sends CONNect Acknowledgement message to sip user B.
But for the sip user that is linked in the CDMA2000 network, the bear format of its support is limited and may have nothing in common with each other, if the bear format supported of two sip users is not occured simultaneously like this, calling can't continue.
This paper is equally applicable to by the bear format negotiation between other equipment in the Session Initiation Protocol access CDMA2000 network.
Summary of the invention
The invention provides a kind of coding/decoding negotiation method, solved between the sip user that inserts in the CDMA2000 system and to have caused calling out the problem that can't continue because the encoding and decoding of supporting are inconsistent, in order to carry out voice call between the sip terminal of realizing supporting in the CDMA2000 system different encoding and decoding.
The present invention includes following steps:
Step 3, the called subscriber sends ALERTING message to MSCe, and MSCe detects the coding/decoding capability that the called subscriber supported, and calculates the common factor of calling subscriber's coding/decoding capability and called subscriber's coding/decoding capability; If common factor is arranged, then calling subscriber and called subscriber can directly set up calling, access success; Otherwise then execution in step four;
Step 4, MSCe calculates the common factor of the union of MGW coding/decoding capability and called subscriber's coding/decoding capability with calling subscriber's coding/decoding capability; MSCe calculates the common factor of the union of MGW coding/decoding capability and calling subscriber's coding/decoding capability with called subscriber's coding/decoding capability; If two common factors have one to be empty set or all to be empty set, call failure then, flow process finishes; Otherwise then execution in step five;
Step 5, MSCe sends message to media gateway, and setting up two RTP is the real-time protocol (RTP) terminal, carries out encoding and decoding conversion, is used for carrying the two ends conversation;
Step 6, MSCe sends ALERTING message to the calling subscriber after receiving the response message of media gateway, sends medium to the called subscriber and switches message;
Step 7, after MSCe receives called subscriber's medium switching response message, the call setup success.
Further, said method also has following characteristics: in the step 2, it is that the account form of the union of media gateway coding/decoding capability and calling subscriber's coding/decoding capability is that MSCe calculates MGW: find out calling subscriber's coding/decoding capability set unsupported coding/decoding capability of institute and be attached to the afterbody of calling subscriber's coding/decoding capability set and concentrate at the set of MGW coding/decoding capability and calling subscriber's coding/decoding capability union of sets from the set of MGW coding/decoding capability, the priority that calling subscriber's coding/decoding capability is gathered is gathered greater than the MGW coding/decoding capability.
Further, said method also has following characteristics: in the step 3, if calling subscriber's coding/decoding capability and called subscriber's coding/decoding capability have common factor, at this moment, in mobile exchange emulation, do not need to set up bearing resource, on bearer path, do not need to carry out compress speech and encoding and decoding conversion.
Further, said method also has following characteristics: in the step 4, the account form that MSCe calculates MGW coding/decoding capability and called subscriber's coding/decoding capability union is: find out called subscriber's coding/decoding capability set unsupported coding/decoding capability of institute and be attached to the afterbody of called subscriber's coding/decoding capability set and concentrated at the set of MGW coding/decoding capability and called subscriber's coding/decoding capability union of sets from the set of MGW coding/decoding capability, the priority that called subscriber's coding/decoding capability is gathered is gathered greater than the MGW coding/decoding capability.
Further, said method also has following characteristics: in the step 5, MSCe requires media gateway to set up a new context by sending message, comprises two orders in this message, and the real-time protocol (RTP) terminal that is connected with the calling subscriber is set up in first order on media gateway; The real-time protocol (RTP) terminal that is connected with the called subscriber is set up in second order on media gateway.
Further, said method also has following characteristics: the bearing capacity of two real-time protocol (RTP) terminals is respectively the common factor of the union of MGW coding/decoding capability and called subscriber's coding/decoding capability with calling subscriber's coding/decoding capability; The union of MGW coding/decoding capability and calling subscriber's coding/decoding capability is with the common factor of called subscriber's coding/decoding capability.
Further, said method also has following characteristics: in the step 6, MSCe sends ALERTING message to the calling subscriber after receiving the response message of media gateway, sending medium switching message to the called subscriber is meant: MSCe informing user terminal, media gateway have the ability of its conversation of carrying.
The inventive method is applied to be linked into the call establishment between the sip user in the CDMA2000 system, issue media description information in the call setup message of sip user except the bear format that comprises the calling subscriber at MSCe, increased the bear format of media gateway, make when the bear format between the user terminal does not exist under the situation of common factor still can intercommunication, strengthened the compatibility of system.
Description of drawings
Fig. 1 is the network model figure that the present invention uses;
Fig. 2 is the set relations topological diagram that there is the situation of occuring simultaneously in the bearing capacity between the sip user in the prior art;
Fig. 3 is the call setup flow chart under the situation that the existence of the bearing capacity between the sip user is occured simultaneously in the prior art;
Fig. 4 is the set relations topological diagram that there is not the situation of common factor in the bearing capacity between the sip user of the present invention;
Fig. 5 is the call setup flow chart that there is not the situation of common factor in the bearing capacity between the sip user of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
Fig. 1 is the network model figure that the present invention uses, and comprises that as shown in Figure 1 MGW is that media gateway, sip user A, MSCe promptly move exchange emulation, sip user B:
Wherein sip user A and sip user B are respectively the sip user that belongs under the MSCe or other support the equipment of Session Initiation Protocol.
Φ m represents that MGW is the code/decode format set that media gateway is supported, this set can not be empty set.
According to Φ 1, the various combination of Φ 2 and three set of Φ m can be divided into following three kinds of situations:
Situation 1: Φ c is that Φ c=Φ 1 ∩ Φ 2 is not empty set, the set relations of its bearing capacity as shown in Figure 2, Φ 1, Φ 2 exist and occur simultaneously, in this case, this is called out does not need to set up bearing resource on gateway, gateway does not need to participate in this calling, and its call establishment as shown in Figure 3.
Situation 2: Φ c is an empty set, Φ a be Φ a=Φ 1 ∩ (Φ 2 ∪ Φ m) and Φ b be Φ b=Φ 2 ∩ (Φ 1 ∪ Φ m) all for empty set, the set relations of its bearing capacity as shown in Figure 4, the bear format negotiation result of this calling is the RTO calling; Gateway need be set up two RTP (real time protocol) to be the real-time protocol (RTP) terminal and to insert back-to-back that TC carries out encoding and decoding conversion; Its call establishment process as shown in Figure 5.
Situation 3: Φ c is an empty set, and one of them is empty set or be empty set Φ b or Φ a, and then this calling can't be set up, thus this situation no longer this paper discuss in the scope.
For situation 1, this paper is identical with the result of X.S0025 agreement, but for situation 2, adopts X.S0025 to call out and can't continue.
As shown in Figure 5, be the call setup flow chart that there is not the situation of common factor in bearing capacity between the sip user of the present invention; Fig. 5 has described under the situation that the bear format between sip user A and the sip user B does not have to occur simultaneously, and by the improved coding/decoding negotiation method of asking union, makes it whole flow processs of replay call, and this flow process may further comprise the steps:
Step 501, MSCe receives the call setup message from certain sip user, the set that MSCe detects the coding/decoding capability that this calling subscriber supports is Φ 1, MSCe judges that this calling need be routed to another (perhaps same) sip user after doing number analysis, wherein media description is SDP-A, and its bearing capacity is Φ 1;
Step 502, MSCe sends call setup message to another sip user, and wherein media description information is SDP-Am, and the set of its bearing capacity is that the union of caller ability Φ 1 and media gateway ability Φ m is Φ 1m=Φ 1 ∪ Φ m;
Step 503, MSCe receives the ALERTING message of called subscriber B, and media description is SDP-B in this ALERTING message, the indication called subscriber the bearing capacity that can support be Φ 2, MSCe at first needs to calculate the common factor Φ c of the bearing capacity between calling subscriber and the called subscriber, Φ c=Φ 1 ∩ Φ 2; If Φ c is not an empty set, then execution in step 304; Otherwise, carry out 504;
Step 304, MSCe sends to sip user A with ALERTING message, and wherein media description information is SDP-B, and its bearing capacity is Φ 2;
Step 504, MSCe utilizes method above to calculate Φ a=Φ 1 ∩ (Φ 2 ∪ Φ m) and Φ b=Φ 2 ∩ (Φ 1 ∪ Φ m), if Φ a and Φ b one of them for empty set or be empty set, call release then, flow process end; Otherwise MSCe sends H248 message to gateway: Add message is prepared two RTP terminals in a context, its far-end points to sip user A respectively and sip user B is SDP-Ar and SDP-Br, and bearing capacity is respectively first kind of encoding and decoding of set Φ a and Φ b;
Step 505, MSCe receives the preparation media answer message of gateway, and the local media of two terminals of indication is described and is respectively SDP-A1, SDP-B1 in the message, and its bearing capacity is respectively Φ a, Φ b;
Step 506, MSCe sends ALERTING message to the calling subscriber, and the media description information of indication local terminal is SDP-A1 in this message, and its bearing capacity is Φ a;
Step 507, MSCe sends medium to the called subscriber simultaneously and switches message, and party B-subscriber's distant end media is switched to the medium SDP-B1 of local terminal, and its bearing capacity is Φ b;
Step 508, MSCe receives called subscriber's medium switching response message, so far, all connects between calling subscriber A and the called subscriber B;
Step 509, MSCe receives that the called subscriber is the connection message of sip user B;
Step 510, MSCe is that sip user A sends connection message to the calling subscriber;
Step 511, MSCe receives calling subscriber's CONNect Acknowledgement message;
Step 512, MSCe sends CONNect Acknowledgement message to the called subscriber.
In sum, the inventive method is applied to be linked into the call establishment between the sip user in the CDMA2000 system, issue media description information in the call setup message of sip user except the bear format that comprises the calling subscriber at MSCe, increased the bear format of media gateway, make when the bear format between the user terminal does not exist under the situation of common factor still can intercommunication, strengthened the compatibility of system.
Claims (7)
1. a coding/decoding negotiation method is characterized in that, may further comprise the steps:
Step 1, the calling subscriber promptly moves exchange emulation to MSCe and sends call setup request message;
Step 2, MSCe detects the coding/decoding capability that the calling subscriber supported and calculates the union that MGW is media gateway coding/decoding capability and calling subscriber's coding/decoding capability, sends it to the called subscriber;
Step 3, the called subscriber sends ALERTING message to MSCe, and MSCe detects the coding/decoding capability that the called subscriber supported, and calculates the common factor of calling subscriber's coding/decoding capability and called subscriber's coding/decoding capability; If common factor is arranged, then calling subscriber and called subscriber can directly set up calling, access success; Otherwise then execution in step four;
Step 4, MSCe calculates the common factor of the union of MGW coding/decoding capability and called subscriber's coding/decoding capability with calling subscriber's coding/decoding capability; MSCe calculates the common factor of the union of MGW coding/decoding capability and calling subscriber's coding/decoding capability with called subscriber's coding/decoding capability; If two common factors have one to be empty set or all to be empty set, call failure then, flow process finishes; Otherwise then execution in step five;
Step 5, MSCe sends message to media gateway, and setting up two RTP is the real-time protocol (RTP) terminal, carries out encoding and decoding conversion, is used for carrying the two ends conversation;
Step 6, MSCe sends ALERTING message to the calling subscriber after receiving the response message of media gateway, sends medium to the called subscriber and switches message;
Step 7, after MSCe receives called subscriber's medium switching response message, the call setup success.
2. method according to claim 1, it is characterized in that, in the step 2, it is that the account form of the union of media gateway coding/decoding capability and calling subscriber's coding/decoding capability is that MSCe calculates MGW: find out calling subscriber's coding/decoding capability set unsupported coding/decoding capability of institute and be attached to the afterbody of calling subscriber's coding/decoding capability set and concentrate at the set of MGW coding/decoding capability and calling subscriber's coding/decoding capability union of sets from the set of MGW coding/decoding capability, the priority that calling subscriber's coding/decoding capability is gathered is gathered greater than the MGW coding/decoding capability.
3. method according to claim 1 is characterized in that, in the step 3, if calling subscriber's coding/decoding capability and called subscriber's coding/decoding capability have common factor, at this moment, in mobile exchange emulation, do not need to set up bearing resource, on bearer path, do not need to carry out compress speech and encoding and decoding conversion.
4. method according to claim 1, it is characterized in that, in the step 4, the account form that MSCe calculates MGW coding/decoding capability and called subscriber's coding/decoding capability union is: find out called subscriber's coding/decoding capability set unsupported coding/decoding capability of institute and be attached to the afterbody of called subscriber's coding/decoding capability set and concentrated at the set of MGW coding/decoding capability and called subscriber's coding/decoding capability union of sets from the set of MGW coding/decoding capability, the priority that called subscriber's coding/decoding capability is gathered is gathered greater than the MGW coding/decoding capability.
5. method according to claim 1, it is characterized in that in the step 5, MSCe requires media gateway to set up a new context by sending message, comprise two orders in this message, the real-time protocol (RTP) terminal that is connected with the calling subscriber is set up in first order on media gateway; The real-time protocol (RTP) terminal that is connected with the called subscriber is set up in second order on media gateway.
6. method according to claim 5 is characterized in that, the bearing capacity of two real-time protocol (RTP) terminals is respectively the common factor of the union of MGW coding/decoding capability and called subscriber's coding/decoding capability with calling subscriber's coding/decoding capability; The union of MGW coding/decoding capability and calling subscriber's coding/decoding capability is with the common factor of called subscriber's coding/decoding capability.
7. method according to claim 1 is characterized in that, in the step 6, after MSCe receives the response message of media gateway, send ALERTING message to the calling subscriber, send medium switching message to the called subscriber and be meant: MSCe informing user terminal, media gateway have the ability of its conversation of carrying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101484242A CN101141807B (en) | 2007-08-25 | 2007-08-25 | Coding/decoding negotiation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101484242A CN101141807B (en) | 2007-08-25 | 2007-08-25 | Coding/decoding negotiation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101141807A CN101141807A (en) | 2008-03-12 |
| CN101141807B true CN101141807B (en) | 2011-10-26 |
Family
ID=39193481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101484242A Expired - Fee Related CN101141807B (en) | 2007-08-25 | 2007-08-25 | Coding/decoding negotiation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101141807B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562667B (en) * | 2009-05-19 | 2012-09-05 | 中兴通讯股份有限公司 | Coding/decoding conversion control method, media gateway and system under soft switch architecture |
| CN102137093A (en) * | 2010-12-10 | 2011-07-27 | 华为技术有限公司 | Method for processing media stream and media gateway |
| CN103401833A (en) * | 2013-06-26 | 2013-11-20 | 华为技术有限公司 | Media cipher/decipher switching method and device |
| CN107181723A (en) * | 2016-03-11 | 2017-09-19 | 中兴通讯股份有限公司 | A kind of media coding/decoding negotiation method and terminal device |
| CN106791241B (en) * | 2016-12-09 | 2020-03-03 | 中国联合网络通信集团有限公司 | Coding and decoding negotiation method and call controller |
| CN110740478A (en) * | 2018-07-18 | 2020-01-31 | 成都鼎桥通信技术有限公司 | Video resolution negotiation method and device |
| US11539763B2 (en) | 2019-02-13 | 2022-12-27 | Apple Inc. | Apparatus and method for session initiated protocol (SIP) registration procedure for access network bitrate recommendation (ANBR) capability signaling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921478A (en) * | 2005-08-26 | 2007-02-28 | 华为技术有限公司 | Business signal transmitting method based on network agreement |
| CN1937620A (en) * | 2005-09-23 | 2007-03-28 | 华为技术有限公司 | Media flow transmission address consulting method |
-
2007
- 2007-08-25 CN CN2007101484242A patent/CN101141807B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921478A (en) * | 2005-08-26 | 2007-02-28 | 华为技术有限公司 | Business signal transmitting method based on network agreement |
| CN1937620A (en) * | 2005-09-23 | 2007-03-28 | 华为技术有限公司 | Media flow transmission address consulting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101141807A (en) | 2008-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2114049B1 (en) | Video interworking gateway, system and method for realizing video call service | |
| CN101141807B (en) | Coding/decoding negotiation method | |
| JP4362261B2 (en) | Speech code control method | |
| JP4532048B2 (en) | In a cellular network, a method for performing basic call setup, in which call control and bearer control are separated and a layer address and a logical point are transferred in the reverse direction | |
| CN100417288C (en) | Method of turning multimedia call back to speech call | |
| CN101562667B (en) | Coding/decoding conversion control method, media gateway and system under soft switch architecture | |
| CN101288320B (en) | Method and device for establishing and optimizing bearer path | |
| US20050048973A1 (en) | Methods and systems for performing call handover in a media gateway | |
| CN100334843C (en) | System and method for realizing packet voice network monitoring | |
| JP4597449B2 (en) | In a cellular network, a method for performing basic call setup, in which call control and bearer control are separated and a layer address and a logical point are forwarded | |
| CN100454915C (en) | System, method and information processing device for realizing multimedia service change | |
| CN101543106A (en) | A telecommunication system for controlling media gateways | |
| CN101547266B (en) | Method and system for providing intelligent service and gateway | |
| CN101742560A (en) | Data transmission method, data transmission device and network system | |
| CN101111002A (en) | Lossless transmission method in IP field junction centre after implementing business change by voice | |
| WO2012089064A1 (en) | Method and device for interacting control information between access terminal in circuit switch domain and as | |
| CN1761274B (en) | Method for handling call holding | |
| US9143726B2 (en) | Video media server for realizing video intercommunication gateway function and video intercommunication method | |
| CN101282574A (en) | Communication system, equipment and multimedia calling method | |
| CN100403795C (en) | Method for realizing NGN network and mobile network video interconnection | |
| CN101360333A (en) | Call connection establishing method | |
| CN101083799B (en) | Calling method for telecom network | |
| CN101026806A (en) | Method for transmitting DTMF information for CDMA system | |
| CN100499708C (en) | Method for playing individualized ring back tone for calling terminal in low speed | |
| CN101156461B (en) | Method for junction centre implementing double-service alternation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20160825 |