CN102726096B - Coding/decoding negotiation method and equipment - Google Patents
Coding/decoding negotiation method and equipment Download PDFInfo
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- CN102726096B CN102726096B CN201180003666.7A CN201180003666A CN102726096B CN 102726096 B CN102726096 B CN 102726096B CN 201180003666 A CN201180003666 A CN 201180003666A CN 102726096 B CN102726096 B CN 102726096B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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Abstract
The invention provides coding/decoding negotiation method and equipment.This coding/decoding negotiation method comprises reception first and supports encoding and decoding list, described first supports that encoding and decoding list is sent to call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node; Support that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility; Described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding are set to the first-selected encoding and decoding of this calling; Described first-selected encoding and decoding are sent to calling origination node via described calling transfer node.
Description
Technical field
The present invention relates to encoding and decoding technique, particularly relate to a kind of coding/decoding negotiation method and equipment, belong to communication technical field.
Background technology
Network Internet Protocol (Internet Protocol, IP) changing is the direction that communication network builds evolution, and the demand for development operator based on the new business of IP carrying provides the IP communication network of the carrying of applicable IP operation, high bandwidth, high efficiency, low cost.In IP communication network, in order to save valuable wireless network and transmission network, Media Stream be generally by specific coding and decoding technology complete end-to-end between transmission.When carrying out media stream delivery based on IP communication network, compatible encode/decode-free operation (Transcoder Free Operation to be realized in one end to end calling, TrFO), clear and definite principle must be defined in the TrFO negotiations process of call establishment.
Fig. 1 is that the TrFO of prior art consults schematic flow sheet.As shown in Figure 1, comprise following flow process: calling origination node (MSC-O) sends the address initial message (Initial Address Message, IAM) carrying the encoding and decoding list (Supported Codec List) that local exchange is supported to calling intermediate node (MSC-I); MSC-I, after receiving IAM message, deletes the code/decode type self do not supported, and the IAM message after this deletion is forwarded to call ending node (MSC-T) from the encoding and decoding list supported; MSC-T deletes the code/decode type self do not supported from the encoding and decoding list supported, the first-selected encoding and decoding (Selected Codec) of calling out are determined according to called access side situation, and the available encoding and decoding list of last negotiation (Available Codec list), and by negotiation result to call originate to transmission, to make MSC-I and MSC-O carry out record to the first-selected encoding and decoding of negotiation result and available encoding and decoding list, the carrying for this calling is set up.
When carrying out coding/decoding negotiation based on above-mentioned flow process, do not take the compatibility relation between different encoding and decoding into consideration, thus compatible encoding and decoding cannot be utilized to realize more excellent coding/decoding negotiation.
Summary of the invention
For the defect existed in prior art, the embodiment of the present invention provides coding/decoding negotiation method and equipment, realizes the coding/decoding negotiation optimized in order to utilize compatible encoding and decoding.
According to the one side of the embodiment of the present invention, a kind of coding/decoding negotiation method is provided, comprises:
Encoding and decoding list is supported in reception first, and described first supports that encoding and decoding list is sent to call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node;
Support that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding are set to the first-selected encoding and decoding of this calling;
Described first-selected encoding and decoding are sent to calling origination node via described calling transfer node.
According to the another aspect of the embodiment of the present invention, a kind of coding/decoding negotiation equipment is provided, comprises:
First receiver module, for receiving the first support encoding and decoding list, described first supports that encoding and decoding list is sent to call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node;
First acquisition module, for supporting that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Described second encoding and decoding for described first encoding and decoding being set to the call ending node carrying encoding and decoding of this calling, and are set to the first-selected encoding and decoding of this calling by the first negotiation module;
Sending module, for being sent to calling origination node by described first-selected encoding and decoding via described calling transfer node.
According to coding/decoding negotiation method and the equipment of the above-mentioned aspect of the embodiment of the present invention, because MSC-T is when first-selected encoding and decoding are selected in the encoding and decoding supported according to MSC-I, MSC-O and self, its take into consideration the first support encoding and decoding list and second to support in encoding and decoding list comprise the compatibility relation of encoding and decoding, and compatible encoding and decoding are set to respectively the first-selected encoding and decoding of the carrying encoding and decoding of call ending node and this calling, make under the scene that there are compatible encoding and decoding, the optimization coding/decoding negotiation based on compatible encoding and decoding can be realized.
According to the another aspect of the embodiment of the present invention, another kind of coding/decoding negotiation method is provided, comprises:
Receive this call preference encoding and decoding, these call preference encoding and decoding wherein said are arranged through calling start node, calling transfer node and call ending node negotiate, and these call preference encoding and decoding described are sent to described calling start node by described calling transit node;
Described first-selected encoding and decoding and the 3rd are supported that encoding and decoding list compares, and the encoding and decoding that the wherein said 3rd supports encoding and decoding list to comprise described calling start node supports, obtain the 3rd encoding and decoding with described first-selected encoding and decoding compatibility;
The priority of described first-selected encoding and decoding and described 3rd encoding and decoding is obtained according to pre-set priority list; If the priority of described 3rd encoding and decoding is higher than the priority of described first-selected encoding and decoding, then described 3rd encoding and decoding are set to the calling start node carrying encoding and decoding of this calling.
According to the one side again of the embodiment of the present invention, another kind of coding/decoding negotiation equipment is provided, comprises:
Second receiver module, for receiving this call preference encoding and decoding, these call preference encoding and decoding wherein said are arranged through calling start node, calling transfer node and call ending node negotiate, and these call preference encoding and decoding described are sent to described calling start node by described calling transit node;
Second acquisition module, for described first-selected encoding and decoding and the 3rd are supported that encoding and decoding list compares, the encoding and decoding that the wherein said 3rd supports encoding and decoding list to comprise described calling start node supports, obtain the 3rd encoding and decoding with described first-selected encoding and decoding compatibility;
Second negotiation module, for obtaining the priority of described first-selected encoding and decoding and described 3rd encoding and decoding according to pre-set priority list; If the priority of described 3rd encoding and decoding is higher than the priority of described first-selected encoding and decoding, then described 3rd encoding and decoding are set to the calling start node carrying encoding and decoding of this calling.
According to coding/decoding negotiation method and the equipment of the above-mentioned aspect of the embodiment of the present invention, when call ending node and calling intermediate node do not carry out compatible TrFO process, the process of compatible TrFO is realized in calling origination node, take the compatibility relation between the encoding and decoding of local support and this first-selected encoding and decoding of calling out into consideration, thus under the scene that there are compatible encoding and decoding, select the encoding and decoding that the encoding and decoding that priority is higher are set up as the carrying that this node accesses side, thus improve voice quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the TrFO of prior art consults schematic flow sheet;
Fig. 2 is the schematic flow sheet of the coding/decoding negotiation method of the embodiment of the present invention one;
Fig. 3 is the signaling diagram of the application example one of the coding/decoding negotiation method of the embodiment of the present invention one;
Fig. 4 is the signaling diagram of the application example two of the coding/decoding negotiation method of the embodiment of the present invention one;
Fig. 5 is the signaling diagram of the application example three of the coding/decoding negotiation method of the embodiment of the present invention one;
Fig. 6 is the structural representation of the coding/decoding negotiation equipment of the embodiment of the present invention two;
Fig. 7 is the schematic flow sheet of the coding/decoding negotiation method of the embodiment of the present invention three;
Fig. 8 is the signaling diagram of the application example of the coding/decoding negotiation method of the embodiment of the present invention three;
Fig. 9 is the structural representation of the coding/decoding negotiation equipment of the embodiment of the present invention four.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The coding/decoding negotiation method of the embodiment of the present invention is for realizing calling out start node, coding/decoding negotiation between calling transit node and call ending node three, wherein call ending node is such as the equipment such as mobile switching centre (MSC) or gateway, is not limited to terminal called.For a typical station to station call, calling start node is mobile switching centre-initial office (MSC-Original, MSC-O), calling transit node is mobile switching centre-intermediate office (MSC-Intermediate, MSC-I), calling transit node is mobile switching centre-landing office (MSC-Terminate, MSC-T), is described below as example.
Embodiment one
The coding/decoding negotiation method of the embodiment of the present invention one is performed by MSC-T.
Fig. 2 is the schematic flow sheet of the coding/decoding negotiation method of the embodiment of the present invention one.As shown in Figure 2, the method comprises:
Step S201, receives first and supports encoding and decoding list, and described first supports that encoding and decoding list is sent to MSC-T by MSC-I, the encoding and decoding that described first supports encoding and decoding list to comprise MSC-O and MSC-I all supports;
Particularly, MSC-O sends IAM message to MSC-I, and this IAM message carries the start node comprising whole encoding and decoding that calling start node is supported and supports encoding and decoding list; After MSC-I receives IAM message from MSC-O, start node entrained in IAM message is supported that encoding and decoding list and the support encoding and decoding list of self are compared, the encoding and decoding that there is MSC-I can not support if know in start node support encoding and decoding list, then corresponding encoding and decoding are supported to delete encoding and decoding list from start node, form first and support encoding and decoding list, and this first support encoding and decoding list is carried at IAM message repeating to MSC-T.
Step S202, support that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise MSC-T supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Particularly, MSC-T is after the support encoding and decoding list receiving MSC-O transmission, encoding and decoding list and the support encoding and decoding list of self is supported by first, namely second support that encoding and decoding list compares, obtain first and support that encoding and decoding list and second supports at least one pair of encoding and decoding in encoding and decoding list with compatibility relation, i.e. the first encoding and decoding and the second encoding and decoding.The encoding and decoding that first encoding and decoding are supported for MSC-T, the encoding and decoding that the second encoding and decoding are supported for MSC-O and MSC-I, the wherein encoding and decoding that also all can support for MSC-O, MSC-I and MSC-T three of the first encoding and decoding.
Described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding are set to the first-selected encoding and decoding of this calling by step S203;
First-selected encoding and decoding are sent to MSC-O via MSC-I by step S204.
Particularly, MSC-T is to call initiator to returning APM message, the first-selected encoding and decoding that MSC-T is selected are carried in this APM message, also can carry available encoding and decoding list, this available encoding and decoding list such as comprises the first encoding and decoding, the second encoding and decoding and is included in other encoding and decoding in the first support encoding and decoding list and the second support encoding and decoding list simultaneously.
According to the coding/decoding negotiation method of above-described embodiment, because MSC-T is when first-selected encoding and decoding are selected in the encoding and decoding supported according to MSC-I, MSC-O and self, its take into consideration the first support encoding and decoding list and second to support in encoding and decoding list comprise the compatibility relation of encoding and decoding, and compatible encoding and decoding are set to respectively the first-selected encoding and decoding of the carrying encoding and decoding of call ending node and this calling, make under the scene that there are compatible encoding and decoding, the optimization coding/decoding negotiation based on compatible encoding and decoding can be realized.
Further, in the coding/decoding negotiation method of above-described embodiment, described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling, and the first-selected encoding and decoding described second encoding and decoding being set to this calling specifically comprise:
The priority of described first encoding and decoding and described second encoding and decoding is obtained according to pre-set priority list; Described first encoding and decoding higher than the priority of described first encoding and decoding, are then set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding are set to the first-selected encoding and decoding of this calling by the priority of described second encoding and decoding;
Particularly, be preset with priority list in MSC-T, this priority list at least comprises the priority of each encoding and decoding that MSC-T supports, and the priority of the compatible mutually encoding and decoding of the encoding and decoding supported with MSC-T.Wherein, the priority of encoding and decoding can as required according to preset rules setting, such as, be that encoding and decoding distribute priority according to codec speech mass effect.In addition, this priority list can directly be arranged in MSC-T, also can MSC-O, MSC-I or arbitrarily other network equipments be sent to MSC-T, described encoding and decoding priority can according to codec speech mass effect be encoding and decoding distribute priority.
MSC-T by by the first encoding and decoding and the second encoding and decoding and priority list comparison, can know the first encoding and decoding and priority corresponding to the second encoding and decoding.Second coding/decoding apparatus if the priority of the second encoding and decoding is higher than the priority of the first encoding and decoding, is then the first-selected encoding and decoding of this calling by the relatively priority of the first encoding and decoding and the second encoding and decoding.
In addition, if there are multipair the first compatible encoding and decoding and the second encoding and decoding, or exist and same second encoding and decoding compatibility multiple first encoding and decoding or exist and multiple second encoding and decoding of same first encoding and decoding compatibility, then can search the priority of each first encoding and decoding and the second encoding and decoding respectively, and the second encoding and decoding selecting priority the highest are as first-selected encoding and decoding, and the call ending node selecting the first relatively high encoding and decoding of multiple first encoding and decoding medium priorities of the second encoding and decoding compatibility the highest with this priority to call out as this carries encoding and decoding.
According to the coding/decoding negotiation method of above-described embodiment, because MSC-T is according to MSC-I, when first-selected encoding and decoding are selected in MSC-O and the encoding and decoding self supported, its take into consideration the first support encoding and decoding list and second to support in encoding and decoding list comprise the compatibility relation of encoding and decoding, and the priority of a pair encoding and decoding that there is compatibility relation is inquired about according to the priority list pre-set, select the higher encoding and decoding of priority as first-selected encoding and decoding, make under the scene that there are compatible encoding and decoding, the encoding and decoding of negotiable selection optimum are as first-selected encoding and decoding, thus the voice quality in lifting voice call procedure.
Fig. 3 is the signaling diagram of the application example one of the coding/decoding negotiation method of the embodiment of the present invention one.As shown in Figure 3, the encoding and decoding that MSC-O supports comprise encoding and decoding a, b, c and d, MSC-I does not support encoding and decoding d, MSC-T only supports encoding and decoding b and c, wherein, encoding and decoding a and b is compatible, and the voice quality priority of encoding and decoding a, b, c, d is a > b > c > d.Particularly, comprise the following steps:
Step S301, MSC-O make a call coding/decoding negotiation, carry the encoding and decoding list (supported Codeclist) self supported, comprise encoding and decoding a, b, c and d in IAM message;
Step S302, MSC-I delete the encoding and decoding d self do not supported, to make a call coding/decoding negotiation to MSC-T, carry the encoding and decoding list self supported, comprise encoding and decoding a, b and c in IAM message;
Step S303, MSC-T do a-b compatible processing at this node;
Particularly, the encoding and decoding list relatively self supported (comprises encoding and decoding b and encoding and decoding list c) and in IAM incoming message and (comprises encoding and decoding a, b and c), it is compatible to there is encoding and decoding a and b in identification, and check the priority of encoding and decoding a and encoding and decoding b, know that the voice quality priority of encoding and decoding a is higher than encoding and decoding b, then using the encoding and decoding that encoding and decoding b sets up as the carrying of called access side, and first-selected encoding and decoding are set to encoding and decoding a;
Step S304, first-selected encoding and decoding are returned to call originate to.Further, also to call originate to returning available encoding and decoding list, encoding and decoding a, b and c is comprised; MSC-I and MSC-O does not revise first-selected encoding and decoding;
Step S305, sets up carrying according to first-selected encoding and decoding, realizes the TrFO calling of encoding and decoding a-b compatibility.
According to the coding/decoding negotiation method of above-described embodiment, due in MSC-I and MSC-O, encoding and decoding a is the encoding and decoding that priority is the highest, give tacit consent to a collection of selected materials decoding headed by it, so by performing compatible processing by MSC-T in above-mentioned application scenarios, decrease the flow process of the first-selected encoding and decoding of reverse amendment of origination node and intermediate node in coding/decoding negotiation flow process.
Fig. 4 is the signaling diagram of the application example two of the coding/decoding negotiation method of the embodiment of the present invention one.As shown in Figure 4, the encoding and decoding that MSC-O supports comprise encoding and decoding a, c and d, MSC-I does not support encoding and decoding d, MSC-T only supports encoding and decoding b and c, wherein, encoding and decoding a and b is compatible, and the voice quality priority of encoding and decoding a, b, c, d is a > b > c > d.Particularly, following flow process is comprised:
Step S401, MSC-O make a call coding/decoding negotiation, carry the encoding and decoding list self supported, comprise encoding and decoding a, c and d in IAM message;
Step S402, MSC-I delete the encoding and decoding d self do not supported, to make a call coding/decoding negotiation to MSC-T, carry the encoding and decoding list self supported, comprise encoding and decoding a and c in IAM message;
Step S403, MSC-T compares the encoding and decoding list self supported and (comprises encoding and decoding b and encoding and decoding list c) and in IAM incoming message (comprises encoding and decoding a and c), it is compatible to there is encoding and decoding a and b in identification, and check the priority of encoding and decoding a and encoding and decoding b, know that the voice quality priority of encoding and decoding a is higher than encoding and decoding b, then using the encoding and decoding that encoding and decoding b sets up as the carrying of called access side, and first-selected encoding and decoding are set to encoding and decoding a;
Step S404, first-selected encoding and decoding are returned to call originate to.Further, also to call originate to returning available encoding and decoding list, encoding and decoding a and c is comprised;
Step S405, sets up carrying according to first-selected encoding and decoding, and realize the TrFO calling of encoding and decoding a-b compatibility, voice quality is better than the voice quality of the TrFO adopting encoding and decoding c to reach.
According to the coding/decoding negotiation method of above-described embodiment, because the voice quality priority of encoding and decoding a is higher than the voice quality priority of encoding and decoding c, so by performing compatible processing by MSC-T in above-mentioned application scenarios, avoid and select suboptimum encoding and decoding to set up calling, thus improve the voice quality in calling procedure.
Fig. 5 is the signaling diagram of the application example three of the coding/decoding negotiation method of the embodiment of the present invention one.As shown in Figure 5, the encoding and decoding that MSC-O supports comprise encoding and decoding a, and MSC-I also supports encoding and decoding a, MSC-T only supports encoding and decoding b and c, wherein, encoding and decoding a and b is compatible, and the voice quality priority of encoding and decoding a, b, c is a > b > c.Particularly, following flow process is comprised:
Step S501, MSC-O make a call coding/decoding negotiation, carry the encoding and decoding list self supported, comprise encoding and decoding a in IAM message;
Step S502, MSC-I also support encoding and decoding a, to make a call coding/decoding negotiation to MSC-T, carry the encoding and decoding list self supported, comprise encoding and decoding a in IAM message;
Step S503, MSC-T compare self support encoding and decoding list (comprise encoding and decoding b and c) and IAM incoming message in encoding and decoding list (comprise encoding and decoding a), it is compatible to there is encoding and decoding a and b in identification, then using the encoding and decoding that encoding and decoding b sets up as the carrying of called access side, and first-selected encoding and decoding are set to encoding and decoding a;
Step S504, first-selected encoding and decoding a is returned to call originate to.Further, also to call originate to returning available encoding and decoding list, encoding and decoding a is comprised;
Step S505, sets up carrying according to first-selected encoding and decoding, realizes the TrFO calling of encoding and decoding a-b compatibility, without the need to inserting codec (TC) in calling.
According to the coding/decoding negotiation method of above-described embodiment, under the scene that there are compatible encoding and decoding, can avoid because consulting unsuccessfully to cause the voice quality of calling procedure lower, and the defect expending encoding and decoding resource needing extra insertion codec and cause.
Embodiment two
Fig. 6 is the structural representation of the coding/decoding negotiation equipment of the embodiment of the present invention two.As shown in Figure 6, this coding/decoding negotiation equipment comprises:
First receiver module 61, for receiving the first support encoding and decoding list, described first supports that encoding and decoding list is sent to call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node;
First acquisition module 62, for supporting that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Described second encoding and decoding for described first encoding and decoding being set to the call ending node carrying encoding and decoding of this calling, and are set to the first-selected encoding and decoding of this calling by the first negotiation module 63;
Sending module 64, for being sent to calling origination node by described first-selected encoding and decoding via described calling transfer node.
The coding/decoding negotiation equipment of the embodiment of the present invention two is such as integrated to be arranged on call ending node.
The idiographic flow of the coding/decoding negotiation equipment execution coding/decoding negotiation of above-described embodiment is identical with the coding/decoding negotiation method of the embodiment of the present invention one, so place repeats no more.
According to the coding/decoding negotiation equipment of above-described embodiment, due to the encoding and decoding supported according to MSC-I, MSC-O and self select first-selected encoding and decoding time, its take into consideration the first support encoding and decoding list and second to support in encoding and decoding list comprise the compatibility relation of encoding and decoding, and compatible encoding and decoding are set to respectively the first-selected encoding and decoding of the carrying encoding and decoding of call ending node and this calling, make under the scene that there are compatible encoding and decoding, the optimization coding/decoding negotiation based on compatible encoding and decoding can be realized.
Further, in the coding/decoding negotiation equipment of above-described embodiment, the first negotiation module is also for the priority that obtains described first encoding and decoding and described second encoding and decoding according to pre-set priority list; If the priority of described second encoding and decoding is higher than the priority of described first encoding and decoding, then described first encoding and decoding is set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding is set to the first-selected encoding and decoding of this calling.
According to the coding/decoding negotiation equipment of above-described embodiment, due to according to MSC-I, when first-selected encoding and decoding are selected in MSC-O and the encoding and decoding self supported, its take into consideration the first support encoding and decoding list and second to support in encoding and decoding list comprise the compatibility relation of encoding and decoding, and the priority of a pair encoding and decoding that there is compatibility relation is inquired about according to the priority list pre-set, select the higher encoding and decoding of priority as first-selected encoding and decoding, make under the scene that there are compatible encoding and decoding, the encoding and decoding of negotiable selection optimum are as first-selected encoding and decoding, thus the voice quality in lifting voice call procedure.
Further, in the coding/decoding negotiation equipment of above-described embodiment, described first encoding and decoding are arranged in described second and support that encoding and decoding list is supported in encoding and decoding list and described first, or are only arranged in described second support encoding and decoding list.
Further, in the coding/decoding negotiation equipment of above-described embodiment, if described first negotiation module is also for described first encoding and decoding of existence at least two with described second encoding and decoding compatibility, the priority of at least two the first encoding and decoding lists described in then obtaining according to described pre-set priority list, and the call ending node carrying encoding and decoding the first the highest for priority encoding and decoding being set to this calling.
Embodiment three
The coding/decoding negotiation method of the embodiment of the present invention three is performed by MSC-O.
Fig. 7 is the schematic flow sheet of the coding/decoding negotiation method of the embodiment of the present invention three.As shown in Figure 7, the method comprises:
Step S701, receive this call preference encoding and decoding, these call preference encoding and decoding wherein said are arranged through calling start node, calling transfer node and call ending node negotiate, and these call preference encoding and decoding described are sent to described calling start node by described calling transit node;
Particularly, MSC-O receives the APM message returned by MSC-T via MSC-I, carries the first-selected encoding and decoding of this calling that MSC-T selects, also can comprise the available encoding and decoding list that MSC-O, MSC-I and MSC-T all support in this APM message.
Described first-selected encoding and decoding and the 3rd are supported that encoding and decoding list compares by step S702, and the encoding and decoding that the wherein said 3rd supports encoding and decoding list to comprise described calling start node supports, obtain the 3rd encoding and decoding with described first-selected encoding and decoding compatibility;
Step S703, obtains the priority of described first-selected encoding and decoding and described 3rd encoding and decoding according to pre-set priority list; If the priority of described 3rd encoding and decoding is higher than the priority of described first-selected encoding and decoding, then described 3rd encoding and decoding are set to the calling start node carrying encoding and decoding of this calling.
Particularly, be preset with priority list in MSC-O, this priority list at least comprises the priority of each encoding and decoding that MSC-O supports, and the priority of the compatible mutually encoding and decoding of the encoding and decoding supported with MSC-O.Wherein, the priority of encoding and decoding can as required according to preset rules setting, such as, be that encoding and decoding distribute priority according to codec speech mass effect.
According to the coding/decoding negotiation method of above-described embodiment, when call ending node and calling intermediate node do not carry out compatible TrFO process, the process of compatible TrFO is realized in calling origination node, take the compatibility relation between the encoding and decoding of local support and this first-selected encoding and decoding of calling out into consideration, thus under the scene that there are compatible encoding and decoding, select the encoding and decoding that the encoding and decoding that priority is higher are set up as the carrying that this node accesses side, thus improve voice quality.
Fig. 8 is the signaling diagram of the application example of the coding/decoding negotiation method of the embodiment of the present invention three.As shown in Figure 8, the encoding and decoding that MSC-O supports comprise encoding and decoding a, b, c and d, MSC-I does not support encoding and decoding d, MSC-T only supports encoding and decoding b and c, wherein, encoding and decoding a and b is compatible, and the voice quality priority of encoding and decoding a, b, c, d is a > b > c > d.Particularly, following flow process is comprised:
Step S801, MSC-O make a call coding/decoding negotiation, carry the encoding and decoding list (supported Codeclist) self supported, comprise encoding and decoding a, b, c and d in IAM message;
Step S802, MSC-I delete the encoding and decoding d self do not supported, to make a call coding/decoding negotiation to MSC-T, carry the encoding and decoding list self supported, comprise encoding and decoding a, b and c in IAM message;
Step S803, MSC-T compares the encoding and decoding list self supported and (comprises encoding and decoding b and encoding and decoding list c) and in IAM incoming message and (comprise encoding and decoding a, b and c), the encoding and decoding adopting encoding and decoding b to set up as the carrying of called access side and first-selected encoding and decoding;
Step S804, first-selected encoding and decoding are carried in negotiate response message (APM) return to call originate to.Further, also to call originate to returning available encoding and decoding list, encoding and decoding b and c is comprised;
Step S805, after MSC-O receives the APM message carrying first-selected encoding and decoding b, a-b compatible processing is done at this node, the supported encoding and decoding list of first-selected encoding and decoding and this locality (is comprised encoding and decoding a, b, c and d) to compare, identify encoding and decoding a and first-selected encoding and decoding b compatible, and the priority of encoding and decoding a is higher than the priority of encoding and decoding b, then realize compatible TrFO at this node, using the encoding and decoding of encoding and decoding a as the carrying foundation of this node access side, the i.e. encoding and decoding of the carrying foundation of caller access side, local terminal media gateway (MGW) realizes a-b compatibility,
Step S806, sets up carrying according to compatible encoding and decoding a-b, realizes the TrFO calling of encoding and decoding a-b compatibility.
Embodiment four
Fig. 9 is the structural representation of the coding/decoding negotiation equipment of the embodiment of the present invention four.As shown in Figure 9, this coding/decoding negotiation equipment comprises:
Second receiver module 91, for receiving this call preference encoding and decoding, these call preference encoding and decoding wherein said are arranged through calling start node, calling transfer node and call ending node negotiate, and these call preference encoding and decoding described are sent to described calling start node by described calling transit node;
Second acquisition module 92, for described first-selected encoding and decoding and the 3rd are supported that encoding and decoding list compares, the encoding and decoding that wherein said 3rd supports encoding and decoding list to comprise described calling start node supports, obtain the 3rd encoding and decoding with described first-selected encoding and decoding compatibility;
Second negotiation module 93, for obtaining the priority of described first-selected encoding and decoding and described 3rd encoding and decoding according to pre-set priority list; If the priority of described 3rd encoding and decoding is higher than the priority of described first-selected encoding and decoding, then described 3rd encoding and decoding are set to the calling start node carrying encoding and decoding of this calling.
The coding/decoding negotiation equipment of the embodiment of the present invention four is such as integrated to be arranged on calling start node.
The idiographic flow of the coding/decoding negotiation equipment execution coding/decoding negotiation of above-described embodiment is identical with the coding/decoding negotiation method of the embodiment of the present invention three, so place repeats no more.
According to the coding/decoding negotiation equipment of above-described embodiment, when call ending node and calling intermediate node do not carry out compatible TrFO process, the process of compatible TrFO is realized in calling origination node, take the compatibility relation between the encoding and decoding of local support and this first-selected encoding and decoding of calling out into consideration, thus under the scene that there are compatible encoding and decoding, select the encoding and decoding that the encoding and decoding that priority is higher are set up as the carrying that this node accesses side, thus improve voice quality.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a coding/decoding negotiation method, is characterized in that, comprising:
Call ending node receives first and supports encoding and decoding list, described first supports that encoding and decoding list is sent to described call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node; Described first support encoding and decoding lists be described calling transit node when receiving described calling start node and supporting encoding and decoding list, delete described calling start node and support to call out described in encoding and decoding list that encoding and decoding that transit node can not support are formed;
By described first, described call ending node supports that encoding and decoding list and second supports that encoding and decoding list compares, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling by described call ending node, and described second encoding and decoding are set to the first-selected encoding and decoding of this calling;
Described first-selected encoding and decoding are sent to calling origination node via described calling transfer node by described call ending node.
2. coding/decoding negotiation method according to claim 1, is characterized in that, described first encoding and decoding are set to the call ending node carrying encoding and decoding of this calling, and the first-selected encoding and decoding described second encoding and decoding being set to this calling specifically comprises:
The priority of described first encoding and decoding and described second encoding and decoding is obtained according to pre-set priority list; If the priority of described second encoding and decoding is higher than the priority of described first encoding and decoding, then described first encoding and decoding is set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding is set to the first-selected encoding and decoding of this calling.
3. coding/decoding negotiation method according to claim 1 or 2, is characterized in that, described first encoding and decoding are arranged in described second and support that encoding and decoding list is supported in encoding and decoding list and described first, or is only arranged in described second support encoding and decoding list.
4. coding/decoding negotiation method according to claim 2, it is characterized in that, if exist at least two with described first encoding and decoding of described second encoding and decoding compatibility, the priority of at least two the first encoding and decoding lists described in then obtaining according to described pre-set priority list, and the call ending node carrying encoding and decoding the first the highest for priority encoding and decoding being set to this calling.
5. a coding/decoding negotiation equipment, is characterized in that, comprising:
First receiver module, for receiving the first support encoding and decoding list, described first supports that encoding and decoding list is sent to call ending node by calling out transit node, the encoding and decoding that described first supports encoding and decoding list to comprise calling start node all supports with calling transit node; Described first support encoding and decoding lists be described calling transit node when receiving described calling start node and supporting encoding and decoding list, delete described calling start node and support to call out described in encoding and decoding list that encoding and decoding that transit node can not support are formed;
First acquisition module, for supporting that encoding and decoding list and second supports that encoding and decoding list compares by described first, obtain the first encoding and decoding and the second encoding and decoding, the encoding and decoding that wherein said second supports encoding and decoding list to comprise call ending node supports, described first encoding and decoding are arranged in described second and support encoding and decoding list, described second encoding and decoding are positioned at described first and support encoding and decoding list, and described first encoding and decoding and described second encoding and decoding compatibility;
Described second encoding and decoding for described first encoding and decoding being set to the call ending node carrying encoding and decoding of this calling, and are set to the first-selected encoding and decoding of this calling by the first negotiation module;
Sending module, for being sent to calling origination node by described first-selected encoding and decoding via described calling transfer node.
6. coding/decoding negotiation equipment according to claim 5, is characterized in that, described first negotiation module is also for the priority that obtains described first encoding and decoding and described second encoding and decoding according to pre-set priority list; If the priority of described second encoding and decoding is higher than the priority of described first encoding and decoding, then described first encoding and decoding is set to the call ending node carrying encoding and decoding of this calling, and described second encoding and decoding is set to the first-selected encoding and decoding of this calling.
7. the coding/decoding negotiation equipment according to claim 5 or 6, is characterized in that, described first encoding and decoding are arranged in described second and support that encoding and decoding list is supported in encoding and decoding list and described first, or is only arranged in described second support encoding and decoding list.
8. coding/decoding negotiation equipment according to claim 6, it is characterized in that, if described first negotiation module is also for described first encoding and decoding of existence at least two with described second encoding and decoding compatibility, the priority of at least two the first encoding and decoding lists described in then obtaining according to described pre-set priority list, and the call ending node carrying encoding and decoding the first the highest for priority encoding and decoding being set to this calling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/084733 WO2013097090A1 (en) | 2011-12-27 | 2011-12-27 | Codec negotiation method and device |
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| CN102726096A CN102726096A (en) | 2012-10-10 |
| CN102726096B true CN102726096B (en) | 2015-07-29 |
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| CN107018537B (en) * | 2017-03-30 | 2020-03-17 | 努比亚技术有限公司 | Voice communication method and device |
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| CN101959320A (en) * | 2010-10-12 | 2011-01-26 | 中兴通讯股份有限公司 | Method and device for realizing compatibility of codec types among calling stations |
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| DE102004019988B4 (en) * | 2004-04-23 | 2006-07-27 | Siemens Ag | Codec mode configuration selection for transcoder-free operations |
| US7835346B2 (en) * | 2006-01-17 | 2010-11-16 | Genband Us Llc | Methods, systems, and computer program products for providing transcoder free operation (TrFO) and interworking between unlicensed mobile access (UMA) and universal mobile telecommunications system (UMTS) call legs using a media gateway |
| CN101562910B (en) * | 2008-04-18 | 2011-12-14 | 中国移动通信集团公司 | Voice data transmission method as well as system and media gateway |
| CN101635994B (en) * | 2008-07-25 | 2013-03-20 | 中兴通讯股份有限公司 | Method for acquiring speech coding capacity of wireless network and realizing TrFO by core network |
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