CN1870592A - Settling method of optimination code-decode - Google Patents
Settling method of optimination code-decode Download PDFInfo
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- CN1870592A CN1870592A CNA2006100662407A CN200610066240A CN1870592A CN 1870592 A CN1870592 A CN 1870592A CN A2006100662407 A CNA2006100662407 A CN A2006100662407A CN 200610066240 A CN200610066240 A CN 200610066240A CN 1870592 A CN1870592 A CN 1870592A
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Abstract
This invention provides a resolving method for optimizing codes and decodes including: A, a calling side transmits code-decode information to a called side, B, the called side negotiates for the optimization of codes-decodes after receiving the information, C, the called side sends the selected codes-decodes to the network side, D, the network side sends the selected ones to the calling side.
Description
Technical field
The present invention relates to the communications field, especially relate to resolving method for optimizing codes and decodes in a kind of soft switch call establishment.
Background technology
Before the soft switch call setup, which kind of encoding and decoding is system need determine to adopt come the media stream signal such as voice, video of transmission user.G.711A the encoding and decoding of soft switch support at present have, G.711u, G.729, G.723.1, G.726, T.38, AMR, H.261, H.263, MPEG4 etc.Calling and called both sides in the calling need decide through consultation and adopt which kind of encoding and decoding, and the code/decode type that optimizing code and decode that the negotiation of encoding and decoding is disposed according to the calling and called both sides and both sides' media gateway are supported decides.
In the prior art, can dispose encoding and decoding and preference information in many places in the soft switch, as media gateway, the user, relaying etc., but soft switch does not have the notion of optimizing code and decode when realizing coding/decoding negotiation, during calling subscriber's side direction network side transfer medium stream information, the encoding and decoding tabulation that media gateway is supported sends to network side, the encoding and decoding tabulation of calling subscriber's side is filtered according to the information that disposes in the soft switch by network side then, i.e. deletion a part of encoding and decoding wherein, or directly pass through called subscriber's side, called subscriber's side finish the negotiation of encoding and decoding and will consult after encoding and decoding issue network side, be returned to calling subscriber's side by network side again, both sides' media consultation process finishes.In the prior art,, encoding and decoding are preferably supported abundant inadequately, can not be satisfied the needs of different optimizing code and decodes in the soft switch calling procedure not to the transmission of optimizing code and decode information.
Summary of the invention
Not enough fully inadequately in the above prior art encoding and decoding preferably being supported, the objective of the invention is to, a kind of resolving method for optimizing codes and decodes is provided, optimizing code and decode information in the coding/decoding information and codec capability list unpack can be sent, a kind of scheme of optimizing code and decode negotiation is provided simultaneously, can satisfies the needs of different optimizing code and decodes in the soft switch calling procedure.
For realizing purpose of the present invention, the invention provides a kind of resolving method for optimizing codes and decodes, comprise step:
(A) Calling Side sends coding/decoding information to callee side;
(B) after callee side receives coding/decoding information, carry out the negotiation of optimizing code and decode;
(C) callee side sends to network side with the encoding and decoding of choosing;
(D) network side sends to Calling Side with the encoding and decoding of choosing.
Step (A) further comprises step:
(A1) Calling Side sends coding/decoding information to network side;
(A2) after network side receives the coding/decoding information of Calling Side transmission, coding/decoding information is filtered or preferred process;
(A3) coding/decoding information after network side will be handled sends to callee side.
This method also comprises step: the configuration of coding/decoding information.
The collocation point of the configuration of described coding/decoding information comprises: media gateway, user, relaying, caller conversion, go into relaying calling number, call number.
The described coding/decoding information of step (A) comprises optimizing code and decode information and codec capability list information, and codec capability list information comprises all encoding and decoding that the user media gateway is supported; Optimizing code and decode information comprises data item: user's optimizing code and decode, relaying optimizing code and decode, called number optimizing code and decode.
The described Calling Side of step (A) sends coding/decoding information to callee side optimizing code and decode information and codec capability list unpack is sent.
Step (A) also comprises step: the determining of optimizing code and decode information and codec capability list information:
As user in this soft switch during as caller: if the calling subscriber preferred encoding and decoding, then this optimizing code and decode is come first of codec capability list, fill the user's optimizing code and decode data item in the optimizing code and decode information simultaneously; If the calling subscriber is not preferred, then keep the data initial value in the optimizing code and decode information, codec capability list is arranged by default sequence;
When relaying during as caller: if the caller relaying preferred encoding and decoding, then this optimizing code and decode is come first of codec capability list, fill the relaying optimizing code and decode data item in the optimizing code and decode information simultaneously; If the caller relaying is not preferred, then keep the data initial value in the optimizing code and decode information, codec capability list is arranged by default sequence;
If called number participates in preferred, after the encoding and decoding that network side had occurred in excluding user's optimizing code and decode item and relaying optimizing code and decode, the item in the codec capability list of call number is filled in the called number optimizing code and decode item in order.
Step (A2) also comprises: after network side receives the codec capability list information and optimizing code and decode information of Calling Side transmission, be responsible for the codec capability list of record caller, inquiring calling conversion simultaneously, go into the coding/decoding information that disposes in relaying calling number, the call number.
The negotiation of the described optimizing code and decode of step (B) is the optimum principle of callee side according to encoding and decoding of self supporting and encoding and decoding, chooses the highest encoding and decoding of priority, as the encoding and decoding that media gateway adopted of soft switch control in this calling procedure.
The encoding and decoding that described callee side is supported self are by the decision of the calling form of soft switch.
The calling form of described soft switch comprises: soft switch as Originating Office, soft switch as tandem exchange, soft switch as landing office.
The optimum principle of described encoding and decoding is that the priority orders of optimizing code and decode is: the calling subscriber when having many places optimizing code and decode configuration〉called subscriber〉the caller relaying〉call number〉called relaying.
When soft switch during as Originating Office, the negotiation of callee side optimizing code and decode is:
The calling subscriber has disposed optimizing code and decode, then callee side directly select this optimizing code and decode as this calling procedure in the encoding and decoding that media gateway adopted of soft switch control;
The calling subscriber does not dispose optimizing code and decode: when callee side was the user, then the optimizing code and decode of called subscriber's configuration was used in soft switch; When callee side was relaying, then the optimizing code and decode that disposes in the call number was used in soft switch;
If the calling and called side does not all dispose optimizing code and decode, the optimizing code and decode that disposes on the preferential selective call number of soft switch then.
When soft switch during as tandem exchange, the negotiation of callee side optimizing code and decode is: go into optimizing code and decode that relaying disposes and be only second to optimizing code and decode into the configuration of relaying calling number, and the optimizing code and decode priority of callee side configuration is minimum, and its priority is lower than goes into the optimizing code and decode that disposes in optimizing code and decode that relaying disposes and the call number in the soft switch.
Step (A2) also comprises step:
(A21) whether the inquiry soft switch has disposed encoding and decoding in the caller conversion to the caller relaying, if then filter with the codec capability list of the encoding and decoding of disposing in the caller conversion to the Calling Side transmission;
(A22) whether the inquiry soft switch has disposed optimizing code and decode to going into the relaying calling number, if, then when the negotiation of optimizing code and decode, directly use this optimizing code and decode as this calling procedure in the encoding and decoding that media gateway adopted of soft switch control.
When soft switch during as landing office, the negotiation of callee side optimizing code and decode is: called subscriber's priority is higher than the priority of the optimizing code and decode of the optimizing code and decode of going into the relaying configuration in the soft switch and call number configuration.
The described encoding and decoding of choosing of step (C) comprise to be consulted the preferred encoding and decoding in back or consults the encoding and decoding of back by system default.
Implement the present invention, can farthest satisfy the needs of optimizing code and decode in the different soft switch callings.
Description of drawings
Fig. 1 is a soft switch constructing communication network schematic diagram;
Fig. 2 is the flow chart of resolving method for optimizing codes and decodes of the present invention.
Embodiment
Fig. 1 is a soft switch constructing communication network schematic diagram, and as shown in Figure 1, Calling Side carries out being connected of Media Stream under the control of soft switch with callee side.
Fig. 2 is the flow chart of resolving method for optimizing codes and decodes of the present invention, and as shown in Figure 2, in call establishment, method of the present invention comprises step:
S101. Calling Side sends coding/decoding information to network side:
Coding/decoding information comprises optimizing code and decode information and codec capability list information, among the present invention, when Calling Side by network side when callee side sends coding/decoding information, optimizing code and decode information in the coding/decoding information and codec capability list unpack are sent, wherein:
Codec capability list information should comprise all encoding and decoding that the user media gateway is supported;
Optimizing code and decode information then comprises three data item:
User's optimizing code and decode;
The relaying optimizing code and decode;
The called number optimizing code and decode.
At Calling Side before network side sends coding/decoding information, also comprise step: the configuration of coding/decoding information: as mentioned above, set up in the process at call, soft switch can be disposed optimizing code and decode information or codec capability list information in many places, and following collocation point is specifically arranged:
(1) media gateway, the configuration item of this collocation point are a codec capability list, and it has determined that can use which encoding and decoding to carry out Media Stream by certain media gateway connects;
(2) user, the configuration item of this collocation point is an optimizing code and decode, system can be separately disposes an optimizing code and decode to each user of soft switch, when this user participates in calling out, will preferentially use the encoding and decoding of this configuration;
(3) relaying, the configuration item of this collocation point are a codec capability list, when expression is carried out striking out or incoming call by certain relaying, can use or preferably which encoding and decoding;
(4) caller conversion, the configuration item of this collocation point are a codec capability list, only are applied to into relaying, i.e. soft switch can be carried out the caller conversion to going into relaying, can limit this during conversion and go into the relaying caller and can use which encoding and decoding;
(5) go into the relaying calling number: the configuration item of this collocation point is an optimizing code and decode, only is applied to into relaying, can be to going into optimizing code and decode of relaying calling number configuration, and it is equivalent to the optimizing code and decode of calling subscriber in this soft switch in junction call;
(6) call number: the configuration item of this collocation point is a codec capability list, can use or preferred encoding and decoding during all numbers of the expression a certain specific called number of user/junction call or a certain particular prefix beginning.
Wherein, collocation point (1), (2), (3) and (6) be configured to that the user is as caller in this soft switch the time configuration; Collocation point (4), (5) and (6) be configured to relaying as caller the time configuration.
On the basis of the configuration of coding/decoding information, in the call establishment, among above-mentioned the present invention codec capability list information, optimizing code and decode information determine be:
As user in this soft switch during as caller, codec capability list information, optimizing code and decode information determine be: if the calling subscriber preferred certain encoding and decoding, then optimizing code and decode is come first of codec capability list, fill the user's optimizing code and decode data item in the optimizing code and decode information simultaneously; If the calling subscriber is not preferred, then do not fill, keep the data initial value in the optimizing code and decode information, codec capability list is then arranged by default sequence;
When relaying during as caller, above-mentioned information determine be: if the caller relaying preferred certain encoding and decoding, then optimizing code and decode is come first of codec capability list, fill the relaying optimizing code and decode data item in the optimizing code and decode information simultaneously; If the caller relaying is not preferred, then do not fill, keep the data initial value in the optimizing code and decode information, codec capability list is then arranged by default sequence;
Filling for called number optimizing code and decode item, its codec capability list from call number obtains, if called number participates in preferred, network side is when handling, can the item in the codec capability list of call number be filled in the called number optimizing code and decode item in order, can be a plurality of encoding and decoding, but will exclude the encoding and decoding that in user's optimizing code and decode item and relaying optimizing code and decode, occurred.
S102. after network side receives the coding/decoding information of Calling Side transmission, coding/decoding information is filtered or preferred process:
The so-called filtration, i.e. deletion a part of encoding and decoding wherein; So-called preferred, be meant when the media gateway in the calling procedure is controlled by soft switch, if soft switch is judged the encoding and decoding that Calling Side and callee side are supported and is had common factor in the process of call proceeding, and this common factor comprises configuration " optimizing code and decode ", and then soft switch will directly use " optimizing code and decode " of configuration to carry out the connection of Media Stream by the media gateway that signaling is controlled the calling and called side.
After network side receives the codec capability list information and optimizing code and decode information that Calling Side sends, be responsible for the codec capability list of record caller, inquiring calling conversion simultaneously, go into the coding/decoding information that disposes in relaying calling number, the call number.
S103. the coding/decoding information after network side will be handled sends to callee side;
S104. after callee side receives the coding/decoding information of network side transmission, carry out the negotiation of optimizing code and decode:
After callee side receives the codec capability list information and optimizing code and decode information of network side transmission, carry out the negotiation of optimizing code and decode, callee side is according to the optimum principle of encoding and decoding of self supporting and encoding and decoding, choose the highest encoding and decoding of priority, as the encoding and decoding that media gateway adopted of soft switch control in this calling procedure.
The optimum principle of described encoding and decoding is: when having many places optimizing code and decode configuration, the priority orders of optimizing code and decode is:
The calling subscriber〉called subscriber〉the caller relaying〉call number〉called relaying
The encoding and decoding that callee side is supported self are by the calling form decision of soft switch, and the calling form of soft switch is as follows:
Soft switch is as Originating Office: the caller that is calling is the user in this soft switch;
Soft switch is as tandem exchange: be the caller of calling, the called relaying that is;
Soft switch is as landing office: the caller that is calling is a relaying, and called is user in this soft switch.
Multi-form according to the optimum principle of above-mentioned encoding and decoding and calling, the negotiation of the optimizing code and decode that carries out at callee side can be specific as follows:
S104.1 is when soft switch during as Originating Office, and the negotiation of callee side optimizing code and decode is:
The calling subscriber disposes optimizing code and decode: the optimizing code and decode of calling subscriber's configuration will have limit priority in soft switch, when carrying out the optimizing code and decode negotiation, callee side directly selects the optimizing code and decode of calling subscriber's configuration, as the encoding and decoding that media gateway adopted of soft switch control in this calling procedure;
The calling subscriber does not dispose optimizing code and decode: when callee side was the user, then the optimizing code and decode of called subscriber's configuration was used in soft switch; When callee side was relaying, then the optimizing code and decode that disposes in the call number was used in soft switch;
When if the calling and called side does not all dispose optimizing code and decode, the optimizing code and decode that disposes on the preferential selective call number of soft switch then.
S104.2 is when soft switch during as tandem exchange, and the negotiation of callee side optimizing code and decode is:
During the negotiation of the optimizing code and decode under this kind situation, also need to be to consider optimizing code and decode with the difference of Originating Office among the S104.1 into the relaying configuration, when soft switch is tandem exchange, because callee side also is a relaying, go into optimizing code and decode that relaying disposes and be only second to optimizing code and decode (if existence) into the configuration of relaying calling number, and the optimizing code and decode priority of callee side configuration is minimum, and its priority is lower than goes into the optimizing code and decode that disposes in optimizing code and decode that relaying disposes and the call number in the soft switch.
And as network side when the filtration of carrying out coding/decoding information or the preferred process, also need to increase following two processing:
A. inquire about soft switch and whether the caller relaying has been disposed encoding and decoding in the caller conversion, if, then need the codec capability list that Calling Side sends to be filtered with the encoding and decoding of disposing in the caller conversion, promptly both get common factor;
B. inquire about soft switch and whether disposed optimizing code and decode going into the relaying calling number, if, then this optimizing code and decode has limit priority in soft switch, the optimizing code and decode that is equivalent to calling subscriber in this soft switch, when the negotiation of optimizing code and decode, directly use as this calling procedure in the encoding and decoding that media gateway adopted of soft switch control.
S104.3 is when soft switch during as landing office, and the negotiation of callee side optimizing code and decode is:
Soft switch is during as landing office, its handle with S104.2 in the situation of tandem exchange slightly different, in tandem exchange, called is relaying, and at landing office, called is user in this soft switch, and its priority will be higher than the priority of the optimizing code and decode of the optimizing code and decode of going into the relaying configuration in the soft switch and call number configuration.
For ordinary call, only need the processing audio encoding and decoding preferred; And, need processing audio encoding and decoding simultaneously preferably preferred with coding and decoding video for multimedia call.
S105. callee side sends to network side with the encoding and decoding of choosing;
These encoding and decoding of choosing comprise to be consulted the preferred encoding and decoding in back or consults the encoding and decoding of back by system default.
S106. network side encoding and decoding that callee side is chosen send to Calling Side.
By the step of above-mentioned S101-S106, the negotiations process of calling and called both sides' optimizing code and decode finishes, and the connection of Media Stream is carried out in the encoding and decoding that the media gateway applications in the soft switch is chosen.
The method that separately sends coding/decoding information in the above-mentioned resolving method for optimizing codes and decodes of the present invention and the negotiation of optimizing code and decode, the beneficial effect that brings are farthest to satisfy the needs of optimizing code and decode in the different soft switch callings.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (17)
1. resolving method for optimizing codes and decodes is characterized in that: comprise step:
(A) Calling Side sends coding/decoding information to callee side;
(B) after callee side receives coding/decoding information, carry out the negotiation of optimizing code and decode;
(C) callee side sends to network side with the encoding and decoding of choosing;
(D) network side sends to Calling Side with the encoding and decoding of choosing.
2. the method for claim 1, it is characterized in that: step (A) further comprises step:
(A1) Calling Side sends coding/decoding information to network side;
(A2) after network side receives the coding/decoding information of Calling Side transmission, coding/decoding information is filtered or preferred process;
(A3) coding/decoding information after network side will be handled sends to callee side.
3. the method for claim 1, it is characterized in that: this method also comprises step: the configuration of coding/decoding information.
4. method as claimed in claim 3 is characterized in that: the collocation point of the configuration of described coding/decoding information comprises: media gateway, user, relaying, caller conversion, go into relaying calling number, call number.
5. the method for claim 1, it is characterized in that: the described coding/decoding information of step (A) comprises optimizing code and decode information and codec capability list information, and codec capability list information comprises all encoding and decoding that the user media gateway is supported; Optimizing code and decode information comprises data item: user's optimizing code and decode, relaying optimizing code and decode, called number optimizing code and decode.
6. method as claimed in claim 5 is characterized in that: the described Calling Side of step (A) sends coding/decoding information to callee side optimizing code and decode information and codec capability list unpack is sent.
7. method as claimed in claim 5 is characterized in that: step (A) also comprises step: the determining of optimizing code and decode information and codec capability list information:
As user in this soft switch during as caller: if the calling subscriber preferred encoding and decoding, then this optimizing code and decode is come first of codec capability list, fill the user's optimizing code and decode data item in the optimizing code and decode information simultaneously; If the calling subscriber is not preferred, then keep the data initial value in the optimizing code and decode information, codec capability list is arranged by default sequence;
When relaying during as caller: if the caller relaying preferred encoding and decoding, then this optimizing code and decode is come first of codec capability list, fill the relaying optimizing code and decode data item in the optimizing code and decode information simultaneously; If the caller relaying is not preferred, then keep the data initial value in the optimizing code and decode information, codec capability list is arranged by default sequence;
If called number participates in preferred, after the encoding and decoding that network side had occurred in excluding user's optimizing code and decode item and relaying optimizing code and decode, the item in the codec capability list of call number is filled in the called number optimizing code and decode item in order.
8. method as claimed in claim 2, it is characterized in that: step (A2) also comprises: after network side receives the codec capability list information and optimizing code and decode information of Calling Side transmission, be responsible for the codec capability list of record caller, inquiring calling conversion simultaneously, go into the coding/decoding information that disposes in relaying calling number, the call number.
9. method as claimed in claim 2, it is characterized in that: the negotiation of the described optimizing code and decode of step (B) is the optimum principle of callee side according to encoding and decoding of self supporting and encoding and decoding, choose the highest encoding and decoding of priority, as the encoding and decoding that media gateway adopted of soft switch control in this calling procedure.
10. method as claimed in claim 9 is characterized in that: the encoding and decoding that described callee side is supported self are by the decision of the calling form of soft switch.
11. method as claimed in claim 10 is characterized in that: the calling form of described soft switch comprises: soft switch as Originating Office, soft switch as tandem exchange, soft switch as landing office.
12. method as claimed in claim 9, it is characterized in that: the optimum principle of described encoding and decoding is that the priority orders of optimizing code and decode is: calling subscriber＞called subscriber＞caller relaying＞call number＞called relaying when having many places optimizing code and decode configuration.
13. as claim 11 or 12 described methods, it is characterized in that: when soft switch during as Originating Office, the negotiation of callee side optimizing code and decode is:
The calling subscriber has disposed optimizing code and decode, then callee side directly select this optimizing code and decode as this calling procedure in the encoding and decoding that media gateway adopted of soft switch control;
The calling subscriber does not dispose optimizing code and decode: when callee side was the user, then the optimizing code and decode of called subscriber's configuration was used in soft switch; When callee side was relaying, then the optimizing code and decode that disposes in the call number was used in soft switch;
If the calling and called side does not all dispose optimizing code and decode, the optimizing code and decode that disposes on the preferential selective call number of soft switch then.
14. as claim 11 or 12 described methods, it is characterized in that: when soft switch during as tandem exchange, the negotiation of callee side optimizing code and decode is: go into optimizing code and decode that relaying disposes and be only second to optimizing code and decode into the configuration of relaying calling number, and the optimizing code and decode priority of callee side configuration is minimum, and its priority is lower than goes into the optimizing code and decode that disposes in optimizing code and decode that relaying disposes and the call number in the soft switch.
15. method as claimed in claim 14 is characterized in that: step (A2) also comprises step:
(A21) whether the inquiry soft switch has disposed encoding and decoding in the caller conversion to the caller relaying, if then filter with the codec capability list of the encoding and decoding of disposing in the caller conversion to the Calling Side transmission;
(A22) whether the inquiry soft switch has disposed optimizing code and decode to going into the relaying calling number, if, then when the negotiation of optimizing code and decode, directly use this optimizing code and decode as this calling procedure in the encoding and decoding that media gateway adopted of soft switch control.
16. as claim 11 or 12 described methods, it is characterized in that: when soft switch during as landing office, the negotiation of callee side optimizing code and decode is: called subscriber's priority is higher than the priority of the optimizing code and decode of the optimizing code and decode of going into the relaying configuration in the soft switch and call number configuration.
17. the method for claim 1 is characterized in that: the described encoding and decoding of choosing of step (C) comprise to be consulted the preferred encoding and decoding in back or consults the encoding and decoding of back by system default.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100662407A CN100433725C (en) | 2006-03-30 | 2006-03-30 | Settling method of optimination code-decode |
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| CNB2006100662407A CN100433725C (en) | 2006-03-30 | 2006-03-30 | Settling method of optimination code-decode |
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| CN1870592A true CN1870592A (en) | 2006-11-29 |
| CN100433725C CN100433725C (en) | 2008-11-12 |
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| CNB2006100662407A Expired - Fee Related CN100433725C (en) | 2006-03-30 | 2006-03-30 | Settling method of optimination code-decode |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009046594A1 (en) * | 2007-10-09 | 2009-04-16 | Zte Corporation | A method for negotiating codec between a wireless network and a core network in a mobile |
| WO2010133148A1 (en) * | 2009-05-19 | 2010-11-25 | 中兴通讯股份有限公司 | Coding/decoding conversion control method, media gateway and system under soft-switch architecture |
| CN104093028A (en) * | 2014-06-25 | 2014-10-08 | 中兴通讯股份有限公司 | Device capacity negotiation method and device |
| CN106791241A (en) * | 2016-12-09 | 2017-05-31 | 中国联合网络通信集团有限公司 | A kind of coding/decoding negotiation method and call controller |
| WO2022257988A1 (en) * | 2021-06-09 | 2022-12-15 | 中国电信股份有限公司 | Call establishment method, application server system, terminal, communication network device, and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1192773B1 (en) * | 1999-07-12 | 2012-04-11 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Method and system for exchanging information between multimedia network nodes |
| CN1306757C (en) * | 2002-08-29 | 2007-03-21 | 中兴通讯股份有限公司 | Method of transmitting broadband multimedia data on comprehensive business digital network |
| US20050256959A1 (en) * | 2004-04-13 | 2005-11-17 | Magnus Svensson | Method of and system for multimedia messaging system interoperability |
-
2006
- 2006-03-30 CN CNB2006100662407A patent/CN100433725C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009046594A1 (en) * | 2007-10-09 | 2009-04-16 | Zte Corporation | A method for negotiating codec between a wireless network and a core network in a mobile |
| RU2452121C2 (en) * | 2007-10-09 | 2012-05-27 | ЗетТиИ Корпорейшн | Method for codec negotiation between wireless network and base network in mobile connection system |
| WO2010133148A1 (en) * | 2009-05-19 | 2010-11-25 | 中兴通讯股份有限公司 | Coding/decoding conversion control method, media gateway and system under soft-switch architecture |
| CN104093028A (en) * | 2014-06-25 | 2014-10-08 | 中兴通讯股份有限公司 | Device capacity negotiation method and device |
| CN106791241A (en) * | 2016-12-09 | 2017-05-31 | 中国联合网络通信集团有限公司 | A kind of coding/decoding negotiation method and call controller |
| WO2022257988A1 (en) * | 2021-06-09 | 2022-12-15 | 中国电信股份有限公司 | Call establishment method, application server system, terminal, communication network device, and system |
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| Publication number | Publication date |
|---|---|
| CN100433725C (en) | 2008-11-12 |
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