CN101056466B - A method and device for adjusting the voice encoding and decoding mode in the call process - Google Patents

A method and device for adjusting the voice encoding and decoding mode in the call process Download PDF

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Publication number
CN101056466B
CN101056466B CN2007100873987A CN200710087398A CN101056466B CN 101056466 B CN101056466 B CN 101056466B CN 2007100873987 A CN2007100873987 A CN 2007100873987A CN 200710087398 A CN200710087398 A CN 200710087398A CN 101056466 B CN101056466 B CN 101056466B
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decoding mode
voice encoding
user terminal
priority
tabulation
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CN101056466A (en
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王海磊
李世军
朱浩鹏
李峰
王勇
杨欣华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2008/070026 priority patent/WO2008098490A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

The invention discloses a method of regulating sound coding/decoding means during call, comprising after receiving the call initiated from user terminal, regulating the precedence of the sound coding/decoding means to make the low sound coding/decoding means taking by resource have a high precedence based on the self-supporting sound coding/decoding means reported by user terminal; determining the sound coding/decoding means used by user terminal based on the precedence of the regulated sound coding/decoding means. Furthermore, the invention also provides an apparatus, a method and a mobile exchange center for regulating the sound coding/decoding means during call. The provided technical project saves the network resource and applies the network resource in a largest degree because making the sound edition used by user terminal take a small network resource relative to the old edition. In addition, the invention also saves the air interface resource.

Description

Adjust the method and the device of voice encoding and decoding mode in a kind of calling procedure
Technical field
The present invention relates to wireless communication technology, refer to adjust in a kind of calling procedure the method and the device of voice encoding and decoding mode especially.
Background technology
Along with core net is called out the progress of separating of control and carrying operation and the whole network IPization, the situation that takies of bandwidth has become the subject matter that whole core net is paid close attention in the occupation condition in the bearer network, particularly bearer network.
The a plurality of Speech version of the most of support of present user terminal, as Full-rate version 1, Full-rate version 2, Full-rate version 3, Half-rate version 1 etc.As shown in Table 1, enumerate corresponding relation between several Speech version and its corresponding codes and the speed.
Speech version Codec Speed (kBit/s)
GSM speech full rate version 1 GSM FR 13.0
GSM speech full rate version 2 GSM EFR 12.2
GSM speech full rate version 3 FR AMR 4.75-12.2
GSM speech full rate version 4 OFR AMR-WB 6.6-23.85
GSM speech full rate version 5 FR AMR-WB 6.6-23.85
GSM speech half rate version 1 GSM HR 5.60
GSM speech half rate version 3 HR AMR 4.75-7.95
GSM speech half rate version 4 OHR AMR-WB 6.6-23.85
GSM speech half rate version 6 OHR AMR 6.6-23.85
UMTS Adaptive Multi-Rate UMTS_AMR 4.75-12.2
UMTS Adaptive Multi-Rate 2 UMTS_AMR2 4.75-12.2
8PSK Half Rate Adaptive Multi-Rate OHR_AMR 4.75-12.2
Full Rate Adaptive Multi-Rate WideBand FR AMR-WB 6.6-12.65
UMTS Adaptive Multi-Rate WideBand UMTS AMR-WB 6.6-23.85
8PSK Full Rate Adaptive Multi-Rate WideBand OFR AMR-WB 6.6-23.85
8PSK Half Rate Adaptive Multi-Rate WideBand OHR AMR-WB 6.6-12.65
Table one
According to the existing protocol standard, core net can select to use the highest Speech version of priority according to the Speech version of user terminal to send up.Usually in order to guarantee the speech quality of user terminal, the Speech version that priority is the highest need take bigger Internet resources usually.For example, the Speech version tabulation that user terminal is supported: Full-rate version 1 (GSM speech full rate version 1), Full-rate version 2 (GSMspeech full rate version 2), full-speed voice version 3 (GSM speech full rate version3) and half-rate speech version 1 (GSM speech halfrate version 1), wherein Full-rate version 1 is the highest Speech version of priority.In this case, according to shown in the table one, the required Internet resources that take of Full-rate version 1 are greater than Full-rate version 2, Full-rate version 3, and half-rate speech version 1 required Internet resources that take.
Here, Speech version is the title in traditional GSM network, and the flexible exchanging network Speech version that defines at present 3GPP is called as voice encoding and decoding mode.In this article, Speech version and voice encoding and decoding mode are represented same notion.
In the prior art, it is the user terminal decision that user terminal to send up is given each voice encoding and decoding mode priority orders of the voice encoding and decoding mode tabulation of core net, and immobilizes; Simultaneously, according to the regulation of existing protocol standard, network side can be taken the highest voice encoding and decoding mode of family terminal voice encoding and decoding mode tabulation medium priority all the time.Can support a plurality of voice encoding and decoding modes though just caused user terminal here, but network side can not remove to select user terminal employed voice encoding and decoding mode communication process from the angle of conserve network resources according to the voice encoding and decoding mode of user terminal support.Therefore,, caused waste of network resources, can't farthest utilize Internet resources because the voice encoding and decoding mode selection is improper.
Summary of the invention
In view of this, the main purpose of the embodiment of the invention is to provide a kind of method and device of adjusting voice encoding and decoding mode in calling procedure, and using the method that the invention provides and device can conserve network resources, and farthest utilizes Internet resources.
In addition, the present invention also provides a kind of method and a kind of mobile switching centre that adjusts voice encoding and decoding mode, uses this method and mobile switching centre, can conserve network resources, and farthest utilize Internet resources.
For achieving the above object, the technical scheme of the embodiment of the invention is achieved in that
The embodiment of the invention provides a kind of method of adjusting voice encoding and decoding mode in calling procedure, and in calling procedure, this method may further comprise the steps:
A, receive the calling that user terminal initiates after, according to the voice encoding and decoding mode of self supporting of user terminal to send up, the priority of adjusting described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
B, according to the priority of described adjusted voice encoding and decoding mode, determine the voice encoding and decoding mode that user terminal uses.
In addition, the present invention also provides the device of adjusting voice encoding and decoding mode in a kind of calling procedure, and this device comprises:
Adjustment unit, the priority that is used to adjust described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
Performance element is used for the priority according to the adjusted voice encoding and decoding mode of adjustment unit, determines that user terminal uses the voice encoding and decoding mode of limit priority.
In addition, the present invention also provides a kind of method of adjusting voice encoding and decoding mode, and this method may further comprise the steps:
A, receive the calling that user terminal initiates after, according to the voice encoding and decoding mode of self supporting of user terminal to send up, the priority of adjusting described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
B, according to the priority of described adjusted voice encoding and decoding mode, determine the voice encoding and decoding mode that user terminal uses.
In addition, the present invention also provides a kind of mobile switching centre, and this mobile switching centre comprises at least: adjustment unit, performance element and common factor unit;
Described adjustment unit, the priority that is used to adjust the voice encoding and decoding mode that user terminal supports makes the priority height of the low voice encoding and decoding mode of resource occupation;
Described common factor unit is used for the voice encoding and decoding mode of base station controller or radio network controller support, gets common factor with the voice encoding and decoding mode of the adjusted described user terminal support of adjustment unit; And the tabulation that described common factor is obtained sends to performance element;
Described performance element is used for according to the tabulation of receiving from described common factor unit, determines that user terminal uses the voice encoding and decoding mode of limit priority.
Adjust the method for voice encoding and decoding mode in a kind of calling procedure that the embodiment of the invention provided, the priority of the voice encoding and decoding mode by adjusting the user terminal support makes the priority height of the low voice encoding and decoding mode of resource occupation; According to described adjusted voice encoding and decoding mode priority, determine the voice encoding and decoding mode that user terminal uses then.In addition, the present invention also provides the device of adjusting voice encoding and decoding mode in a kind of calling procedure.Simultaneously, the present invention also provides a kind of method and mobile switching centre that adjusts voice encoding and decoding mode.Technical scheme provided by the present invention, by adjusting the priority of the voice encoding and decoding mode that user terminal supports, make the voice encoding and decoding mode of limit priority take the resource reduction, and then make the employed voice encoding and decoding mode of user terminal take less Internet resources with respect to employed voice encoding and decoding mode in the past, therefore, conserve network resources, and farthest utilize Internet resources.In addition, method provided by the present invention and device not only can be saved the bearer network resource, interface-free resources can also be saved, traditional TDMA exchange GSM network can be used widely or carrying separates with control but the A interface does not have the network of IPization to separate the soft switchcall server of A interface IPization with control with carrying.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describe exemplary embodiment of the present invention in detail with reference to accompanying drawing below, in the accompanying drawing:
Fig. 1 is the exemplary process diagram of the inventive method;
Fig. 2 is the exemplary block diagram of apparatus of the present invention;
Fig. 3 is the flow chart of the present invention's first preferred embodiment method;
Fig. 4 is the structure chart of the present invention first preferred embodiment mobile switching centre;
Fig. 5 is the flow chart of the present invention's second preferred embodiment method;
Fig. 6 is the structure chart of the present invention second preferred embodiment mobile switching centre.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in further detail.
The core concept of the embodiment of the invention is: adjust the priority of the voice encoding and decoding mode of user terminal support, make the priority height of the low voice encoding and decoding mode of resource occupation; According to adjusted voice encoding and decoding mode priority, determine the voice encoding and decoding mode that user terminal uses.Because the voice encoding and decoding mode that network side can be selected in the user terminal, priority is the highest is as the voice encoding and decoding mode of user terminal use.Therefore, in the voice encoding and decoding mode that user terminal is supported, priority that resource occupation is low heightens, network side will be selected the priority height but the low voice encoding and decoding mode of resource occupation according to the height of priority.
At present, the priority of each Speech version is determined according to the position in the tabulation of the Speech version in user terminal.For example, be Full-rate version 1, Full-rate version 2 for the putting in order of Speech version tabulation of core net when user terminal to send up, the full-speed voice version 3, during half-rate speech version 1, then the priority of Full-rate version 1 is the highest, be Full-rate version 2, full-speed voice version 3 successively, half-rate speech version 1.Therefore determine that according to the position this method of priority also can be called priority.In embodiments of the present invention, can adjust the Speech version priority that user terminal is supported by adjusting Speech version position in the Speech version tabulation in user terminal.
Referring to Fig. 1, Fig. 1 is the exemplary process diagram of the inventive method.This method comprises: in step 101, mobile switching centre adjusts the priority of described voice encoding and decoding mode according to the voice encoding and decoding mode of self supporting of user terminal to send up according to the resource principle of optimality; In step 102, mobile switching centre determines that according to the priority of described adjusted voice encoding and decoding mode user terminal uses the highest voice encoding and decoding mode of priority.
Referring to Fig. 2, Fig. 2 is the exemplary block diagram of apparatus of the present invention.This device comprises: adjustment unit 21 and performance element 22.Wherein, adjustment unit 21 is mainly used in the priority of adjusting the voice encoding and decoding mode of user terminal support according to the resource principle of optimality.Performance element 22 is mainly used in the priority according to adjustment unit 21 adjusted voice encoding and decoding modes, determines that user terminal uses the voice encoding and decoding mode of limit priority.
Here, the employed resource principle of optimality of the embodiment of the invention is: the priority height that makes the low voice encoding and decoding mode of resource occupation.Concrete mode can be to give the highest priority with the voice encoding and decoding mode of resource occupation minimum, and what resource occupation took second place is arranged in next, by that analogy; Also the voice encoding and decoding mode of multi-velocity self-adapting can be come override, the voice encoding and decoding mode of occupied bandwidth minimum comes next, and secondly what occupied bandwidth took second place comes again, and coming of occupied bandwidth maximum is last; Can be the resource situation of using according to network, when Internet resources are also relatively more sufficient, be not that minimum voice encoding and decoding mode is given the highest priority with resource occupation yet.
In addition, except adjusting the priority of voice encoding and decoding mode, can also consider user terminal user's priority simultaneously in the embodiment of the invention according to the resource principle of optimality.For example, for the lower user terminal of User Priority, give the highest priority with its voice encoding and decoding mode that takies the resource minimum; And, then can give the highest priority with only being lower than the former voice encoding and decoding mode that takies resource for the higher user terminal of User Priority, realized differentiated service at the user terminal user.
In embodiments of the present invention, current bearer network is not realized under the situation of A interface IPization, can be according to the voice encoding and decoding mode tenability of calling out place base station controller (BSC), get once common factor with the voice encoding and decoding mode of user terminal support, thereby determine the voice encoding and decoding mode that user terminal uses, the voice encoding and decoding mode of user terminal use and the version of BSC support are complementary, thereby reach speech quality preferably.
And realized at current bearer network under the situation of A interface IPization, in order to realize being with outer encode/decode-free (TrFO), reach better voice quality, can also determine the voice encoding and decoding mode that user terminal uses further according to the common voice encoding and decoding mode of supporting of calling/called user terminal in this conversation.Here, the common voice encoding and decoding mode of supporting of calling/called user terminal is: the common factor of the tabulation of the tabulation of the voice encoding and decoding mode that Calling Side is supported, the voice encoding and decoding mode supported with called user terminal place callee side.
Below with in calling procedure, carry out adjusting the priority of voice encoding and decoding mode of user terminal and the situation of the employed voice encoding and decoding mode of definite user terminal is example, describes the present invention's first preferred embodiment.
Referring to Fig. 3, Fig. 3 is the flow chart of the present invention's first preferred embodiment method.The use occasion of flow process shown in Figure 3 is global system for mobile communications (GSM).
In step 301, in call establishment, the voice encoding and decoding mode tabulation that mobile switching centre in the core net (MSC) supports according to the user terminal of receiving, according to required Internet resources that take of each voice encoding and decoding mode and resource principle of optimality, adjust the priority of voice encoding and decoding mode.Here, the Internet resources of indication can be bandwidth.
For example, the priority of user terminal support voice code encoding/decoding mode is full-speed voice version 1, full-speed voice version 2, full-speed voice version 3, half-rate speech version 1.When the resource principle of optimality that adopts is: the voice encoding and decoding mode of multi-velocity self-adapting is come override, the voice encoding and decoding mode of occupied bandwidth minimum comes next, secondly what occupied bandwidth took second place comes again, coming when last of occupied bandwidth maximum, the priority of adjusted user terminal support voice code encoding/decoding mode can be followed successively by: full-speed voice version 3, half-rate speech version 1, full-speed voice version 2, full-speed voice version 1.
In step 302, MSC does the priority of the voice encoding and decoding mode of user terminal support and the voice encoding and decoding mode of current calling place BSC support once to occur simultaneously, and obtains the voice encoding and decoding mode that user terminal and BSC support.This step can be carried out after step 301, also can carry out before step 301.
The voice encoding and decoding mode of supporting as user terminal place BSC has: full-speed voice version 1, full-speed voice version 2, full-speed voice version 3.According in the step 301 for example, can draw and this time call out that operable voice encoding and decoding mode is in proper order on eating dishes without rice or wine: full-speed voice version 3, full-speed voice version 2, full-speed voice version 1.
In step 303, owing to realized A interface IPization among the MSC, therefore in order to realize TrFO, the voice encoding and decoding mode that MSC can also support according to MGW is that CODEC gets once common factor again, obtains the voice encoding and decoding mode that user terminal, BSC and MGW support.
The GSM CODEC that supports as this MGW that BSC connected that calls out the place is GSM FR, FR AMR, when GSM EFR and HR AMR, then according to the result who obtains in the step 302, and the corresponding relation between Speech version shown in the table one and the Codec, the order of the CODEC that this calling can be used on MGW is FR AMR, GSM EFR, GSM FR, promptly corresponding full-speed voice version 3, full-speed voice version 2, full-speed voice version 1.
In step 304, MSC selects the voice encoding and decoding mode of the highest voice encoding and decoding mode of its medium priority as the user terminal use according to the common factor that obtains in the step 303.
In call establishment, flow process shown in Figure 3 can only be carried out at call subscriber terminal, also can only carry out at called user terminal, and can also be to use simultaneously at calling and called.If when only using at caller, core net can obtain the voice encoding and decoding mode that user terminal is supported from call setup (SETUP) message that caller sends when making a call.If during only at called use, then core net can confirm to obtain (CALL CONFIRM) message the voice encoding and decoding mode that called user terminal is supported from the calling that user terminal sends.
If example of the present invention uses at calling and called simultaneously, then can be all during execution of step 303 at calling and called, further the execution result according to step 303 carries out the CODEC negotiation between calling and called, obtain calling and called and all support CODEC, then in the CODEC that calling and called are all supported according to the priority of the voice encoding and decoding mode of correspondence, determine calling and called final use take the minimum voice encoding and decoding mode of Internet resources.
In addition, example of the present invention can also execute flow process shown in Figure 3 respectively at calling and called, determined after self employed voice encoding and decoding mode priority, the voice encoding and decoding mode that the calling and called user is supported occurs simultaneously, and obtains the voice encoding and decoding mode that the resource minimum was all supported and taken to the calling and called user terminal.For example, the priority of caller definite voice encoding and decoding mode after execution of step 303 is: full-speed voice version 3, full-speed voice version 2, full-speed voice version 1; Accordingly, calledly be: full-speed voice version 2, full-speed voice version 1, the Speech version that then last calling and called user terminal uses is the full-speed voice version 2.
The present invention's first preferred embodiment method not only can be applied to the call setup flow process, can also be applied to switching flow.For example user terminal is from the handoff procedure of the GSM of the UMTS switching 2G of 3G.In switching flow, when the MSC of core net receives the reconfiguration request (Iu-Relocation-Required) that user terminal reports from the Iu-interface, the voice encoding and decoding mode that the target BS C that MSC switches to the priority and the user terminal of the voice encoding and decoding mode of user terminal support supports occurs simultaneously, and obtains the voice encoding and decoding mode that user terminal and BSC support.Here obtain the method for the voice encoding and decoding mode that user terminal and target BS C support, can be with reference to introducing in the step 302.Wherein, the voice encoding and decoding mode that user terminal is supported is in call establishment, the voice encoding and decoding mode after the adjustment priority.
Certainly, technical scheme of the present invention, can be equally, the Speech version of in call establishment, adjusting the voice encoding and decoding mode of user terminal support and determining in this communication process, to use, when this user terminal switches, after equally redefining this user terminal and switch with reference to the method for being introduced in the step 302, employed voice encoding and decoding mode.Equally, user terminal can also be to adjust the voice encoding and decoding mode that the user supports in call establishment, only carries out the method for the voice encoding and decoding mode of determining that user terminal uses in handoff procedure.What take place at user terminal is intra-office when switching, and MSC as described herein is the MSC at the current place of user terminal; When user terminal generation inter-office switchover, MSC as described herein is the target MSC that user terminal switches to.In the introduction of this paper, with the unified target MSC that is called of MSC of both of these case.
In the introduction of first preferred embodiment, main describe to be MSC at user terminal set up at every turn calls out or when switching, equal processes of adjusting of the voice encoding and decoding mode that user terminal is supported.
In specific implementation, adjusted voice encoding and decoding mode can also be preserved, in follow-up process,, determine the voice encoding and decoding mode that user terminal uses directly according to the voice encoding and decoding mode of preserving.Here, can carry out the operation of the adjusted voice encoding and decoding mode of storage by VLR Visitor Location Register (VLR) or HLR or MSC.Concrete is operating as: will adjust at MSC before the voice encoding and decoding mode of user terminal, judge the adjusted voice encoding and decoding mode of whether having stored this user terminal among VLR or HLR or the MSC, if stored, then, determine that user terminal uses the highest voice encoding and decoding mode of its medium priority directly according to preserving the voice encoding and decoding mode corresponding with active user's terminal; Otherwise, carry out the step of adjusting the user terminal voice encoding and decoding mode.
Referring to Fig. 4, Fig. 4 is the structure chart that is applicable to the mobile switching centre of the present invention's first preferred embodiment.In this MSC, comprise at least: adjustment unit 41 and performance element 42.Wherein, adjustment unit 41 is mainly used in the priority of the voice encoding and decoding mode of the user terminal support that adjustment is received according to the resource principle of optimality.Performance element 42 is used for the priority according to adjustment unit 41 adjusted voice encoding and decoding modes, determines that user terminal uses the voice encoding and decoding mode of limit priority.
Wherein in order to realize that the voice encoding and decoding mode of being supported between user terminal and the BSC gets common factor, this mobile switching centre further comprises: common factor unit 43.This common factor unit 43 is mainly used in the voice encoding and decoding mode of base station controller or radio network controller support, gets common factor with the voice encoding and decoding mode of adjustment unit 41 adjusted user terminal supports; And the tabulation that common factor obtains sent to performance element 42.Accordingly, performance element 42 is determined voice encoding and decoding mode according to the tabulation of receiving.
In addition, this MSC also further comprises: control unit 44 and memory cell 45.Wherein, memory cell 45 between adjustment unit 41 and performance element 42, is used to receive and preserve the result that adjustment unit 41 is adjusted the user terminal voice encoding and decoding mode.Control unit 44 is used to receive the encoding and decoding speech method of self supporting of user terminal to send up, judges whether preserved corresponding adjustment result in the memory cell 45; Preserved corresponding adjustment as a result the time in memory cell 45, indication performance element 42 is carried out the operation of the voice encoding and decoding mode of determining that user terminal uses according to the adjustment result in the memory cell 45; Do not preserve corresponding adjustment as a result the time in memory cell 45, indication adjustment unit 41 is carried out the operation of adjusting.
Referring to Fig. 5, Fig. 5 is the flow chart of the present invention's second preferred embodiment method.What this preferred embodiment was described is, when the A interface is realized IPization, the calling subscriber from the GSM of the UMTS switching 2G of 3G, have the situation of relaying MGW.Because the A interface has been realized IPization, need between calling/called user terminal, consult the common voice encoding and decoding mode that uses in order to realize TrFO, concrete steps are as follows:
In step 501, the voice encoding and decoding mode that voice encoding and decoding mode that the target BS C that target MSC switches to the priority and the user terminal of the voice encoding and decoding mode of user terminal support supports and target MGW are supported occurs simultaneously, obtain the voice encoding and decoding mode that user terminal and target BS C and target MGW support, as (V, W, X, Y, Z).And the voice encoding and decoding mode that its medium priority is the highest disposes to target MGW and the last use of target BS C, i.e. voice encoding and decoding mode V.
Here (V, W, X, Y, Z) acts on behalf of five kinds of voice encoding and decoding modes respectively, and the priority of V to Z reduces successively.Wherein, the voice encoding and decoding mode that user terminal is supported can be in call establishment, the voice encoding and decoding mode after the adjustment priority.
Here, the tabulation of the voice encoding and decoding mode that the target MGW that target BS C that call subscriber terminal, call subscriber terminal can be switched to and call subscriber terminal switch to all supports, be called the tabulation of the voice encoding and decoding mode that Calling Side supports, also can be called the voice encoding and decoding mode that the switching target side is supported.
In step 502, target MSC sends to the pairing relay MSC of relaying MGW with resulting tabulation in the step 502 (V, W, X, Y, Z).
Performed operation can be finished the calling subscriber and switch the back execution in the step 502.
In step 503, the voice encoding and decoding mode that relay MSC is supported according to the relaying MGW that self manages, get to occur simultaneously with the tabulation of receiving (V, W, X, Y, Z) and obtain the voice encoding and decoding mode tabulation (V, W, X, Z) that relaying MGW and Calling Side are all supported, and this called MS of transmission C that should tabulate.
In step 504, the voice encoding and decoding mode that called MS C supports according to callee side is got common factor with the tabulation of receiving, and selects the highest voice encoding and decoding mode of its medium priority.When the tabulation of receiving is (V, W, X, Z), the code encoding/decoding mode that callee side is supported is (Y, V, Z), and after called MS C got common factor, the result of selection was V.The result that called MS C will select sends to relay MSC, and notifies called MGW and called BSC.
Here, the voice encoding and decoding mode supported of callee side is: the common factor of the voice encoding and decoding mode that the MGW at called user terminal, called user terminal place base station controller or radio network controller and called user terminal place all supports.Wherein the encoding and decoding speech tabulation supported of called user terminal can be adjusted priority according to the resource principle of optimality, also can be not adjust priority.
In step 505, relay MSC sends to target MSC with the voice encoding and decoding mode of receiving, and notice relaying MGW.
In step 506, target MSC is received the voice encoding and decoding mode that relay MSC sends, and is voice encoding and decoding mode V owing to what this moment, called MS C selected, so target MSC need not to reinform the voice encoding and decoding mode that target MGW active user terminal is used.But if the voice encoding and decoding mode that callee side is supported be (Y, X, Z), the voice encoding and decoding mode that called MS C selects is X, and that using owing to target MGW and target BS C are current is V.Therefore target MSC need further reconfigure the voice encoding and decoding mode of target MGW and the current use of target BS C.Specifically shown in the dotted arrow of Fig. 5 step 506.
When target BS C, target MGW, relaying MGW, called BSC and called MGW have all obtained the employed voice encoding and decoding mode of current calling subscriber, target BS C, target MGW, relaying MGW, called BSC and called MGW just can identical voice encoding and decoding mode set up the carrying of this conversation, realize TrFO.
The call subscriber terminal of being mentioned in the foregoing description owing to be that the user terminal that switches has taken place, therefore can be called the switching user terminal with the user terminal that has taken place to switch in communication process; And with in the communication process, the user terminal that does not switch is called non-switching user terminal, i.e. called user terminal described in second preferred embodiment.Flow process shown in Figure 5 is not limited to carry out when call subscriber terminal switches, and when called user terminal switches, also can carry out step as shown in Figure 5.At this moment, then called user terminal is for switching user terminal, and call subscriber terminal is non-switching user terminal.
In flow process shown in Figure 5, introduction be the flow process of the embodiment of the invention method when switching, carried out of user.When the user set up to call out, can between calling/called, consult the common voice encoding and decoding mode that uses according to flow process shown in Figure 5 equally.Only in call establishment, the tabulation of the voice encoding and decoding mode that Calling Side is supported is the voice encoding and decoding mode that the MGW at call subscriber terminal, call subscriber terminal place base station controller or radio network controller and call subscriber terminal place all supports; And carrying out the MSC that determines the employed voice encoding and decoding mode of user terminal is the MSC at the current place of call subscriber terminal.Equally, the embodiment of the invention can be adjusted the voice encoding and decoding mode of user terminal in the process of call setup, and consults to determine the voice encoding and decoding mode of calling/called user terminal use; In the process that switches, consult the voice encoding and decoding mode of determining that calling/called user terminal uses again simultaneously.Also can be only in handoff procedure, consult to determine main/voice encoding and decoding mode of being used by user terminal.
What more than introduce is the situation that has a relaying MGW, and when having a plurality of relaying MGW, common factor is got in same corresponding with these a plurality of relaying MGW relay MSC negotiation.
When being positioned at same MGW, the user terminal that then switches only needs to get common factor with the MGW at self place when calling/called.When calling/called when being positioned at two MGW, then the MSC of Calling Side only needs the MGW of Calling Side support is sent to callee side MSC, the common factor that called MS C gets according to the tabulation of the voice encoding and decoding mode of called user terminal side support and the described tabulation of receiving is determined the voice encoding and decoding mode that caller and called user terminal use and is returned to the MSC at call subscriber terminal place.
In addition, the method for the storaged voice code encoding/decoding mode of describing in first preferred embodiment is equally applicable to second preferred embodiment.
Referring to Fig. 6, Fig. 6 is the structure chart of the present invention second preferred embodiment mobile switching centre.This structure chart comprises adjustment unit 61, common factor unit 63, performance element 62, tabulation receiving element 64, tabulation transmitting element 65.
Wherein, adjustment unit 61 is mainly used in the priority of the voice encoding and decoding mode of the user terminal support that adjustment is received according to the resource principle of optimality.Common factor unit 63 is mainly used in the voice encoding and decoding mode of base station controller or radio network controller support, gets common factor with the voice encoding and decoding mode of adjustment unit 61 adjusted user terminal supports; And the tabulation that common factor obtains sent to performance element 62.Accordingly, performance element 62 is determined voice encoding and decoding mode according to the tabulation of receiving.
In addition,, guarantee the unanimity of voice encoding and decoding mode between the caller and called users terminal, also further comprise: tabulation receiving element 64 and tabulation transmitting element 65 in order to realize TrFO.Wherein, tabulation receiving element 64 be used to receive the voice encoding and decoding mode tabulation that upstream mobile switching centre sends, and the tabulation that will receive is sent to common factor unit 63.
Common factor unit 63, common factor is got in the voice encoding and decoding mode that MGW the supported tabulation that is used for the management of the tabulation of will receive and self place mobile switching centre, and the tabulation that will obtain is sent to downstream mobile switching centre by tabulation transmitting element 65.When the tabulation after common factor will be got in common factor unit 63 sent to downstream mobile switching centre, then current MSC corresponding role in this communication process was a relay MSC.
Common factor can also be got with the tabulation of receiving and this tabulation corresponding user terminal, voice encoding and decoding mode that base station controller or radio network controller or MGW supported in common factor unit 63, and the result after will occuring simultaneously is sent to performance element 62.At this moment, current MSC corresponding role in this communication process is the MSC of pairing MSC of called user terminal or non-switching side correspondence.
In addition, the common factor of the voice encoding and decoding mode that voice encoding and decoding mode that common factor unit 63 can also be supported adjustment unit 61 adjusted user terminals and base station controller or radio network controller are supported sends to downstream mobile switching centre by tabulation transmitting element 65.At this moment, current MSC corresponding role in this communication process is pairing MSC of call subscriber terminal or the corresponding MSC in switching side.
Wherein, tabulation transmitting element 65 is mainly used in the indication transmission tabulation according to common factor unit 63.
Because the technical scheme of the embodiment of the invention is adjusted the priority of user terminal according to the resource principle of optimality, make the employed voice encoding and decoding mode of user terminal take less Internet resources with respect to employed voice encoding and decoding mode in the past, therefore the technical scheme of the embodiment of the invention not only can be saved the bearer network resource, can also save interface-free resources.
In the technical scheme of the embodiment of the invention, core net is adjusted the priority of user terminal support voice code encoding/decoding mode according to the resource principle of optimality, the voice encoding and decoding mode resource occupation minimum that user terminal is used, and then farthest saved the resource of bearer network, particularly bandwidth, and the execution of the embodiment of the invention does not influence user terminal user's regular traffic.Simultaneously, the technical scheme of the embodiment of the invention can make the caller and called users terminal in the calling procedure use identical encoding and decoding speech when A interface IPization, has realized TrFO.And at call subscriber terminal or called user terminal when switching, can guarantee the identical code encoding/decoding mode of caller and called users terminal use too, particularly after the 3G network of having realized TrFO switches to the 2G network, guaranteed the TrFO in the calling/called communication process, saved valuable encoding and decoding (TC) resource, handoff failure between the system that has avoided causing owing to encoding and decoding conversion provides success rate for switching.
In addition, technology of the present invention not only can be applied to GSM can also be applied to WCDMA, and the MSC corresponding with GSM is called MSC Server in the WCDMA system, in the present invention MSC and MSC Server is referred to as mobile switching centre; In addition, corresponding with base station controller also have radio network controller.
Below only be preferred embodiment of the present invention, or not within the spirit and principles in the present invention not all in order to restriction the present invention, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (22)

1. method of adjusting voice encoding and decoding mode in calling procedure is characterized in that in calling procedure, this method may further comprise the steps:
A, receive the calling that user terminal initiates after, according to the voice encoding and decoding mode of self supporting of user terminal to send up, the priority of adjusting described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
B, according to the priority of described adjusted voice encoding and decoding mode, determine the voice encoding and decoding mode that user terminal uses.
2. method according to claim 1 is characterized in that, among the step B, the voice encoding and decoding mode that described definite user terminal uses is:
Determine that user terminal uses the highest voice encoding and decoding mode of priority.
3. method according to claim 1 is characterized in that, in calling procedure, after receiving the voice encoding and decoding mode of self supporting of user terminal to send up, further comprises:
Judged whether to preserve the voice encoding and decoding mode after described user terminal is adjusted priority, if, then direct voice encoding and decoding mode execution in step B according to described preservation; Otherwise, carry out described steps A and preserve described adjusted voice encoding and decoding mode afterwards, and carry out described step B.
4. method according to claim 1 is characterized in that, in the steps A, the step of the priority of the described voice encoding and decoding mode of described adjustment comprises:
According to the required Internet resources that take of described voice encoding and decoding mode, in the voice encoding and decoding mode with described user terminal support, the voice encoding and decoding mode that takies the Internet resources minimum is adjusted to the highest priority.
5. method according to claim 2 is characterized in that, this method further comprises: the User Priority of determining described user terminal; The priority of the described voice encoding and decoding mode of described adjustment makes the high step of the priority of the low voice encoding and decoding mode of resource occupation be:
For the low user terminal of User Priority, give the highest priority with its voice encoding and decoding mode that takies the resource minimum; And, give the highest priority with only being lower than the former voice encoding and decoding mode that takies resource for the high user terminal of User Priority.
6. according to the described method of each claim in the claim 1 to 5, it is characterized in that, in the steps A, further comprise:
Get common factor according to the voice encoding and decoding mode of base station controller or radio network controller support and the voice encoding and decoding mode of described user terminal support, obtain the final voice encoding and decoding mode of supporting of user terminal.
7. according to the described method of each claim in the claim 1 to 5, it is characterized in that, in the steps A, further comprise:
Get common factor according to the voice encoding and decoding mode of media gateway support and the voice encoding and decoding mode of described user terminal support, obtain the final voice encoding and decoding mode of supporting of user terminal.
8. according to the described method of each claim in the claim 1 to 5, it is characterized in that, adjust voice encoding and decoding mode priority, also determine that user terminal uses the highest voice encoding and decoding mode of priority at caller of calling out or called user terminal;
Perhaps,
Adjust voice encoding and decoding mode priority at caller of calling out and called user terminal; Accordingly, the voice encoding and decoding mode that described definite user terminal uses is: according to the adjusted voice encoding and decoding mode priority of calling both sides user terminal, determine the voice encoding and decoding mode as the use of communicating pair user terminal that priority is the highest in the voice encoding and decoding mode that calling both sides is supported simultaneously.
9. according to the described method of each claim in the claim 1 to 5, it is characterized in that after the step B, this method further comprises:
C, in handoff procedure, according to the voice encoding and decoding mode that the priority and the switching target side of described adjusted voice encoding and decoding mode are supported, determine the voice encoding and decoding mode that described user terminal uses.
10. adjust the device of voice encoding and decoding mode in the calling procedure, it is characterized in that this device comprises:
Adjustment unit, the priority that is used to adjust described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
Performance element is used for the priority according to the adjusted voice encoding and decoding mode of adjustment unit, determines that user terminal uses the voice encoding and decoding mode of limit priority.
11. device according to claim 10 is characterized in that,
Described adjustment unit is further used for adjusting according to the User Priority of described user terminal the priority of the voice encoding and decoding mode that user terminal supports.
12. device according to claim 10 is characterized in that,
Described adjustment unit further comprises being used for according to the voice encoding and decoding mode of base station controller support the voice encoding and decoding mode of described user terminal support being got to occur simultaneously and/or according to the voice encoding and decoding mode of media gateway support the voice encoding and decoding mode of described user terminal support is got to occur simultaneously obtaining the final voice encoding and decoding mode of supporting of user terminal.
13., it is characterized in that described adjustment unit and performance element are positioned at mobile switching centre according to claim 10,11 or 12 described devices.
14., it is characterized in that this device further comprises: control unit and memory cell according to claim 10,11 or 12 described devices;
Described memory cell between adjustment unit and performance element, is used to receive and preserve the result that adjustment unit is adjusted the user terminal voice encoding and decoding mode;
Described control unit is used to receive the encoding and decoding speech method of self supporting of user terminal to send up, judges whether preserved corresponding adjustment result in the memory cell; Preserved corresponding adjustment as a result the time in memory cell, the indication performance element is according to the adjustment result in the memory cell, carries out the operation of the voice encoding and decoding mode that described definite user terminal uses; Do not preserve corresponding adjustment as a result the time in memory cell, the indication adjustment unit is carried out the operation of described adjustment.
15. a method of adjusting voice encoding and decoding mode is characterized in that, this method may further comprise the steps:
A, receive the calling that user terminal initiates after, according to the voice encoding and decoding mode of self supporting of user terminal to send up, the priority of adjusting described voice encoding and decoding mode makes the priority height of the low voice encoding and decoding mode of resource occupation;
B, according to the priority of described adjusted voice encoding and decoding mode, determine the voice encoding and decoding mode that user terminal uses.
16. method according to claim 15 is characterized in that, among the step b, the voice encoding and decoding mode that described definite user terminal uses is:
In handoff procedure, according to the voice encoding and decoding mode of target base station controller that switches to or radio network controller support and the common factor of the voice encoding and decoding mode that described user terminal is supported, determine the voice encoding and decoding mode that user terminal uses by user terminal place target MSC.
17. method according to claim 15 is characterized in that, among the step a, the priority of the described voice encoding and decoding mode of described adjustment is: in call establishment, adjust the voice encoding and decoding mode of first user terminal and/or second user terminal; Among the step b, the step of the voice encoding and decoding mode that described definite user terminal uses is:
The common factor of the tabulation of the tabulation of the voice encoding and decoding mode of supporting according to the first user terminal place, first subscriber terminal side, the voice encoding and decoding mode supported with the second user terminal place, second subscriber terminal side is determined the voice encoding and decoding mode that first and two user's terminals are used.
18. method according to claim 17 is characterized in that, determines described in the step b that the step of the voice encoding and decoding mode that first and two user's terminals are used is included as:
The MSC at b11, the first user terminal place is to the MSC at the second user terminal place, sends the tabulation of the voice encoding and decoding mode that first subscriber terminal side supports;
B22, the second user terminal place MSC get common factor to the tabulation of the voice encoding and decoding mode of the described tabulation of receiving and the second subscriber terminal side support, determine the voice encoding and decoding mode that first and two user's terminals are used and return to the MSC at the first user terminal place.
19. method according to claim 17 is characterized in that, when having relaying MGW, the step of the voice encoding and decoding mode that user terminal described in the step b uses comprises:
The MSC at b21, the first user terminal place is to the relay MSC at relaying MGW place, sends the tabulation of the voice encoding and decoding mode that Calling Side supports;
The voice encoding and decoding mode that the described tabulation that b22, relay MSC will be received and described relaying MGW support is got common factor, obtains the tabulation of the voice encoding and decoding mode that the relaying MGW and first subscriber terminal side all support; And the described tabulation that obtains is sent to the MSC at the second user terminal place;
B23, the second user terminal place MSC get common factor to the tabulation of the voice encoding and decoding mode of the described tabulation that sends among the step b22 and the second subscriber terminal side support, determine the voice encoding and decoding mode that first and two user's terminals are used and return to the MSC at the first user terminal place
Wherein, described first user terminal is a call subscriber terminal; Described second user terminal is a called user terminal.
20. according to claim 17,18 or 19 described methods, it is characterized in that, in handoff procedure, carry out described step b: corresponding, first user terminal is the switching user terminal that switches; The non-switching user terminal of second user terminal for not switching;
The tabulation of the voice encoding and decoding mode that described first subscriber terminal side is supported is for switching user terminal, switch target base station controller or the radio network controller that user terminal switches to and switching the voice encoding and decoding mode that target MGW that user terminal switches to all supports; The tabulation of the voice encoding and decoding mode that described second subscriber terminal side is supported is the voice encoding and decoding mode that the MGW at non-switching user terminal, non-switching user terminal place base station controller or radio network controller and non-switching user terminal place all supports.
21. a mobile switching centre is characterized in that, this mobile switching centre comprises at least: adjustment unit, performance element and common factor unit;
Described adjustment unit, the priority that is used to adjust the voice encoding and decoding mode that user terminal supports makes the priority height of the low voice encoding and decoding mode of resource occupation;
Described common factor unit is used for the voice encoding and decoding mode of base station controller or radio network controller support, gets common factor with the voice encoding and decoding mode of the adjusted described user terminal support of adjustment unit; And the tabulation that described common factor is obtained sends to performance element;
Described performance element is used for according to the tabulation of receiving from described common factor unit, determines that user terminal uses the voice encoding and decoding mode of limit priority.
22. mobile switching centre according to claim 21 is characterized in that, this mobile switching centre further comprises: tabulation receiving element and tabulation transmitting element;
Described tabulation receiving element be used to receive the voice encoding and decoding mode tabulation that upstream mobile switching centre sends, and the tabulation that will receive is sent to the common factor unit;
Described common factor unit, be further used for the tabulation that to receive from described tabulation receiving element and the voice encoding and decoding mode that MGW the supported tabulation of self place mobile switching centre management and get common factor, and this is got the tabulation that obtains of occuring simultaneously be sent to downstream mobile switching centre by the tabulation transmitting element; Or the tabulation that will receive from described tabulation receiving element and this tabulation corresponding user terminal, the voice encoding and decoding mode that base station controller or radio network controller or MGW supported are got common factor, and the result after will occuring simultaneously is sent to performance element; Or, the common factor of the voice encoding and decoding mode that the voice encoding and decoding mode that the adjusted described user terminal of adjustment unit is supported and base station controller or radio network controller are supported, transmitting element sends to downstream mobile switching centre by tabulating;
Described tabulation transmitting element is used for sending tabulation according to the indication of common factor unit.
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