CN101355816B - Method and apparatus for negotiating vocoder mode in CDMA system - Google Patents
Method and apparatus for negotiating vocoder mode in CDMA system Download PDFInfo
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- CN101355816B CN101355816B CN2008102161089A CN200810216108A CN101355816B CN 101355816 B CN101355816 B CN 101355816B CN 2008102161089 A CN2008102161089 A CN 2008102161089A CN 200810216108 A CN200810216108 A CN 200810216108A CN 101355816 B CN101355816 B CN 101355816B
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Abstract
The invention discloses a method and a device for negotiating modes for a voice coder in a CDMA system. The method comprises the following steps: S1. a base station receives calling message or the paging response message sent by a mobile station; and S2. if the mobile station supports the fourth generation of the voice coder mode, the load of a current cell is larger than a preset threshold value, and the base station designates the mobile station to establish the fourth generation of the voice coder calling. The device comprises the base station, wherein the base station comprises an acquisition unit used for acquiring the load of the current cell, a recording unit used for recording the deployable threshold value, a comparing unit used for acquiring the compared result of the load of the current cell and the preset threshold value, and a calling establishing unit used for designating the mobile station to establish the fourth generation of the voice coder mode according to the compared result. The method and the device select whether the fourth generation of the voice coder mode is adopted according to the load of the cell, thereby controlling the consumption of the fourth generation of the voice coder mode relative to the voice coder of a medium gateway, and guaranteeing the smooth scale expansion of the system.
Description
Technical field
The present invention relates to a kind of cellular CDMA (CDMA) system, in particular, the negotiating vocoder mode method and apparatus in a kind of code division multiple access system.
Background technology
The CDMA2000 system is moving towards all-IPization, and the advantage of all-IP framework is to save cost, improves voice quality and has technology evolution path clearly.Fig. 1 is the group-network construction of all-IP CDMA2000 system, and (Base Station Subsystem BSS) is connected to core net by IP to base station sub-system; Core net adopts to call out to control with carrying separates, mobile switching centre's simulator (MobileSwitching Center emulation, MSCe) be responsible for calling out control, media gateway (MediaGateway, MGW) provide media control function, and transfer resource is provided, and having the Media Stream operating function, vocoder resources is arranged in MGW.In above-mentioned framework, two notions have been introduced: no code conversion operation (Transcoder Free Operation, TrFO) and long-range code conversion operation (RemoteTranscoder Operation, RTO), these two functions are essential functions of 3GPP2 (third generation partner program 2) standard.
TrFO transmits compressed voice by removing codec between the conventional mobile phone on the bearer path of Packet Based Network, can improve bandwidth availability ratio, reduces loop time delay, improves speech quality; It all is travelling carriage that TrFO requires calling and called, and consults into identical vocoder mode in calling, in this case, can not take the vocoder resources of MGW.
RTO is a kind of mechanism of giving a call arrangement sign indicating number type transducer in core net, if the vocoder mode that calling and called adopt is inconsistent, perhaps an end is PSTN (Public Switched TelephoneNetwork, public fixed telephone network), just need to adopt RTO to change, RTO need take vocoder resources and carry out a yard type conversion on MGW.
Vocoder mode is the encoding and decoding speech pattern that travelling carriage and MGW adopt, common vocoder mode comprises EVRC (Enhanced Variable Rate Codec, Enhanced Variable Rate Coder), Qcelp-13K, Qcelp-8K etc., different vocoder mode can be passed through SO (Service Option, business option) and hold consultation at call phase.4GV (Fourth Generation Vocoder, the 4th generation vocoder) technology is the new technology of releasing of Qualcomm, and it can provide more outstanding voice quality, and can weigh adjustment between voice quality and wireless capacity.
Compare with EVRC, 4GV can improve at least 40% wireless capacity under identical voice quality.Yet, because the complexity of 4GV algorithm, it to the consumption of vocoder resources among the MGW also much larger than EVRC.
For the travelling carriage of supporting 4GV, system specifies the wireless capacity of consulting can promote for 4GV network with vocoder mode in calling, for operator reduces cost.No matter high pass also recommends whether preferred 4GV vocoder mode of travelling carriage in the test specification of 4GV, network side is all preferentially consulted 4GV.Yet this way can cause very big impact to the vocoder resources among the MGW, just needs operator that the vocoder among the MGW is carried out at double dilatation before the 4GV commercialization, thereby has increased the cost of operator, has increased the commercial difficulty of new technology.
Therefore, also there is defective in prior art, awaits improving and development.
Summary of the invention
The technical problem that the present invention solves provides the negotiating vocoder mode method and apparatus in a kind of code division multiple access system, and this method and apparatus can utilize the 4GV technology as far as possible, can smoothly control resource capacity expansion again simultaneously.
For solving the problems of the technologies described above, the present invention adopts following scheme:
Negotiating vocoder mode method in a kind of code division multiple access system may further comprise the steps: call message or the page-response message that travelling carriage sends received in S1, base station; If the described travelling carriage of S2 support the 4th generation vocoder mode, and current area load is greater than default threshold value, the base station specify described travelling carriage set up the 4th generation vocoder call out; S3, mobile switching centre's simulator receive the business option tabulation that described travelling carriage is supported from the base station; S4, when the travelling carriage at calling and called two ends all support the 4th generation vocoder mode, and in the 4th generation, do not set up for during vocoder mode to it in the base station, mobile switching centre's simulator sends updating message for described base station, require described base station with this call negotiation be the 4th generation vocoder mode, realize calling and called all be the 4th generation vocoder no code conversion operation.
Described method, wherein, described step S4 comprises: if the travelling carriage at calling and called two ends have only an end support the 4th generation vocoder mode, and the base station set up the 4th generation vocoder mode; Mobile switching centre's simulator distributes vocoder to set up long-range code conversion operation calling.
Described method, wherein, described step S4 comprises: when the travelling carriage at calling and called two ends do not support the 4th generation vocoder mode, and support of enhanced variable rate coder pattern is then set up the no code conversion operation of Enhanced Variable Rate Coder pattern and is called out.
Described method, wherein, described step S2 comprises: otherwise described base station specifies described travelling carriage to set up the Enhanced Variable Rate Coder call by pattern.
The invention provides the negotiating vocoder mode device in a kind of code division multiple access system, comprise the base station, described base station comprises: acquiring unit is used to obtain the current area load; Record cell is used to write down configurable thresholding; Comparing unit is used to obtain the comparative result between current area load and the default threshold value; And the call setup unit, be used for according to described comparative result specify travelling carriage set up the 4th generation vocoder mode; And the negotiating vocoder mode device also comprises the mobile switching centre's simulator that is connected with described base station, and this mobile switching centre's simulator comprises: receiving element is used for receiving from the base station business option tabulation that described travelling carriage is supported; Updating block, the travelling carriage that is used for searching the calling and called two ends in the tabulation of described business option all supported for the 4th generation during vocoder mode, give described base station send with this call negotiation be the 4th generation vocoder mode updating message, require described base station with this call negotiation be the 4th generation vocoder mode, realize calling and called all be the 4th generation vocoder no code conversion operation.
Described device, wherein, described mobile switching centre simulator also comprises: first module, be used in described business option tabulation, searching all support of enhanced variable rate coder patterns of calling and called, and set up the no code conversion operation of Enhanced Variable Rate Coder pattern and call out.
Compared with prior art, negotiating vocoder mode method and apparatus in the code division multiple access system of the present invention, owing to select whether to adopt 4GV (the 4th generation vocoder) pattern according to cell load, thereby control 4GV (the 4th generation vocoder) guarantees system's smooth expansion for the consumption of vocoder in the media gateway (MGW).
Description of drawings
Fig. 1 is the group-network construction of the all-IP CDMA2000 system of prior art;
Fig. 2 is the flow chart of the negotiating vocoder mode method in the code division multiple access system of the present invention;
Fig. 3 is the negotiating vocoder mode device in the code division multiple access system of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing.
The present invention proposes a kind of negotiating vocoder mode technology in code division multiple access system, select whether to adopt the 4GV pattern according to cell load, taken into account wireless capacity and promoted and system resources consumption, can handle the negotiation of various vocoder mode flexibly, and help the smooth upgrade dilatation of system.
Specifically scheme is as shown in Figure 2:
110, after call message or page-response message from travelling carriage received in the base station, analyze the vocoder mode of this travelling carriage requirement and the business option tabulation that travelling carriage is supported;
120, judge whether travelling carriage supports the 4GV pattern, if yes, then execution in step 130; If then execution in step 142 not;
130, judge whether current area load (L) surpasses default threshold value (T), and if yes, then execution in step 141; If then execution in step 142 not;
141, the base station specifies described travelling carriage to set up the 4GV calling;
142, the base station specifies described travelling carriage to set up EVRC (Enhanced Variable Rate Coder) calling;
The negotiating vocoder mode technology that the present invention proposes, owing to select whether to adopt the 4GV pattern according to cell load, thus control 4GV guarantees system's smooth expansion for the consumption of vocoder in the media gateway (MGW).
The negotiating vocoder mode technology that the present invention describes, at utmost having taken into account wireless capacity promotes and system resources consumption, setting for default threshold value (T), under the extreme case, if default threshold value is set to 100%, then system only can use 4GV under the situation of TrFO, under the situation that to a certain degree promotes wireless capacity and any burden can not arranged the vocoder resources of media gateway (MGW); If default threshold value is set to 0%, then system just as the preferred 4GV that recommends in the high pass test specification, promotes wireless capacity to greatest extent, and strategy is very flexibly.So the present invention can handle the negotiation of various vocoder mode flexibly, and help the smooth upgrade dilatation of system.
210, mobile switching centre's simulator (MSCe) receives the business option tabulation that described travelling carriage is supported from the base station;
220, the travelling carriage at calling and called two ends is all supported the 4GV pattern, and then execution in step 230; Otherwise execution in step 240;
230, mobile switching centre's simulator sends updating message for described base station, and requiring described base station is 4GV with this call negotiation, thereby realizes that calling and called all are TrFO (the no code conversion operation) callings of 4GV.
In this step, even because above-mentioned described default threshold value (T) restriction, the base station not to its set up the 4th generation vocoder mode situation under, can also force to consult TrFO (no code conversion operation) calling into 4GV.As previously mentioned, it all is travelling carriage that TrFO requires calling and called, and, in calling, consult under the situation of identical vocoder mode, do not take the vocoder resources of media gateway (MGW), described, be not subjected to described default threshold value (T) restriction of base station here.
If the travelling carriage at 240 calling and called two ends have only an end support the 4th generation vocoder mode, and the base station set up the 4th generation vocoder mode; Then execution in step 250; Otherwise execution in step 260;
250, mobile switching centre's simulator distributes vocoder, sets up RTO (long-range code conversion operation) calling;
If the travelling carriage at 260 calling and called two ends is all supported EVRC (Enhanced Variable Rate Coder) pattern, then execution in step 270; Otherwise execution in step 280;
270, carry out TrFO (no code conversion operation) and consult, set up TrFO (no code conversion operation) TrFO (no code conversion operation) and call out;
280, setting up RTO (long-range code conversion operation) calls out.
Below enumerate seven typical scenes:
Scene one:
Prerequisite: caller mobile terminal (MS1) and called mobile terminal (MS2) all supports 4GV pattern and EVRC pattern, caller mobile terminal (MS1) place cell load (L1) is less than default threshold value (T1), and called mobile terminal (MS2) place cell load (L2) is less than default threshold value (T2).
Handling process:
311, the base station is according to prerequisite, for caller mobile terminal (MS1) and called mobile terminal (MS2) all selects to set up the EVRC pattern;
312, mobile switching centre's simulator (MSCe) judges that caller mobile terminal (MS1) and called mobile terminal (MS2) support 4GV, send bearer update message to caller mobile terminal (MS1) and base station, place, called mobile terminal (MS2), requiring to revise vocoder mode is the 4GV vocoder mode;
313, consult with caller mobile terminal (MS1), called mobile terminal (MS2) secondary the base station, and revising vocoder mode is the 4GV pattern, calls out thereby set up 4GV TrFO.
Scene two
Prerequisite: caller mobile terminal (MS1) and called mobile terminal (MS2) all supports 4GV and EVRC, caller mobile terminal (MS1) place cell load (L1) is less than default threshold value (T1), and called mobile terminal (MS2) place cell load (L2) is greater than default threshold value (T2).Handling process:
321, the base station is according to prerequisite, for caller mobile terminal (MS1) selects to set up the EVRC vocoder mode, for called mobile terminal (MS2) selects to set up the 4GV vocoder mode;
322, mobile switching centre's simulator (MSCe) judges that caller mobile terminal (MS1) and called mobile terminal (MS2) support 4GV, sends bearer update message to base station, place, caller mobile terminal (MS1), and requiring to revise vocoder mode is the 4GV vocoder mode;
323, consult with caller mobile terminal (MS1) secondary the base station, and revising vocoder mode is the 4GV pattern, calls out thereby set up 4GV TrFO.
Scene three
Prerequisite: caller mobile terminal (MS1) and called mobile terminal (MS2) all supports 4GV and EVRC, caller mobile terminal (MS1) place cell load (L1) is greater than default threshold value (T1), and called mobile terminal (MS2) place cell load (L2) is greater than default threshold value (T2).
Handling process:
331, the base station is according to prerequisite, for caller mobile terminal (MS1) and called mobile terminal (MS2) all selects to set up the 4GV vocoder mode
332, mobile switching centre's simulator (MSCe) is that caller mobile terminal (MS1) and called mobile terminal (MS2) set up 4GV TrFO calling.
Scene four
Prerequisite: caller mobile terminal (MS1) supports 4GV and EVRC, and called mobile terminal (MS2) only supports EVRC, and caller mobile terminal (MS1) place cell load (L1) is greater than default threshold value (T1).
Handling process:
341, the base station is according to prerequisite, for caller mobile terminal (MS1) selects to set up the 4GV vocoder mode, for called mobile terminal (MS2) selects to set up the EVRC vocoder mode
342, mobile switching centre's simulator (MSCe) judges to have only caller mobile terminal (MS1) side to support 4GV among caller mobile terminal (MS1) and called mobile terminal (MS2), and caller mobile terminal (MS1) set up the 4GV vocoder mode, no longer carry out TrFO and consult requiring caller mobile terminal (MS1) to be converted to EVRC, but allocation medium gateway (MGW) vocoder resources is set up RTO and called out.
Scene five
Prerequisite: caller mobile terminal (MS1) supports 4GV and EVRC, and called mobile terminal (MS2) only supports EVRC, and caller mobile terminal (MS1) place cell load (L1) is less than default threshold value (T1).
Handling process:
351, the base station is according to prerequisite, for caller mobile terminal (MS1) and called mobile terminal (MS2) all selects to set up the EVRC vocoder mode
352, mobile switching centre's simulator (MSCe) judges that caller mobile terminal (MS1) and called mobile terminal (MS2) have only caller mobile terminal (MS1) side to support 4GV, and the base station do not set up the 4GV vocoder mode for caller mobile terminal (MS1), will set up EVRC TrFO and call out.
Scene six
Prerequisite: caller mobile terminal (MS1) and called mobile terminal (MS2) do not support 4GV, only all supports EVRC.
Handling process:
361, the base station is according to prerequisite, for caller mobile terminal (MS1) and called mobile terminal (MS2) all selects to set up non-4GV vocoder mode
362, mobile switching centre's simulator (MSCe) judges that caller mobile terminal (MS1) and called mobile terminal (MS2) do not support 4GV, will set up EVRC TrFO and call out.
Scene seven
Prerequisite: caller mobile terminal (MS1) only supports EVRC, and called mobile terminal (MS2) only supports QCelp-13K.
Handling process:
371, the base station is according to prerequisite, for caller mobile terminal (MS1) selects to set up the EVRC pattern, for called mobile terminal (MS2) selects to set up the QCelp-13K pattern;
372, mobile switching centre's simulator (MSCe) judges that caller mobile terminal (MS1) and called mobile terminal (MS2) do not support 4GV, will set up RTO and call out.
The present invention also provides the device of the negotiating vocoder mode in a kind of code division multiple access system, as shown in Figure 3, comprises base station, the mobile switching centre's simulator that is connected with described base station;
Described base station comprises: acquiring unit, record cell, comparing unit, call setup unit.
Acquiring unit is used to obtain the current area load; Record cell is used to write down configurable thresholding; Comparing unit is used to obtain comparative result between current area load and the default threshold value; The call setup unit, be used for according to described comparative result specify described travelling carriage set up the 4th generation vocoder mode.
Mobile switching centre's simulator comprises: receiving element, updating block, first module.
Receiving element is used for receiving from the base station business option tabulation of described travelling carriage support;
Updating block is used for searching the calling and called two ends in the tabulation of described business option travelling carriage all supported for the 4th generation during vocoder mode, give described base station send with this call negotiation be the 4th generation vocoder mode updating message;
First module is used for searching all support of enhanced variable rate coder patterns of calling and called in described business option tabulation, sets up the no code conversion operation of Enhanced Variable Rate Coder pattern and calls out.
Negotiating vocoder mode method and apparatus in the code division multiple access system that the present invention proposes, the 4GV vocoder mode can be selected whether to adopt according to cell load by the system that makes, thus control 4GV guarantees system's smooth expansion for the consumption of vocoder among the MGW.On the other hand, because TrFO calls out the vocoder that can not take MGW, if the calling and called travelling carriage is all supported 4GV, MSCe adopts the 4GV vocoder mode with regard to the mandatory requirement both sides, and this has utilized the contribution of 4GV to wireless capacity to greatest extent under the situation of consumption systems extra resource not.
Should be understood that; the above embodiment that provides is just to explanation of the present invention; and not should be understood to limitation of the present invention; to those skilled in the art; can be improved according to the above description or conversion; and all these improve and conversion all should be disclosed principle and feature, all belong to protection scope of the present invention.
Claims (6)
1. the negotiating vocoder mode method in the code division multiple access system may further comprise the steps:
Call message or the page-response message that travelling carriage sends received in S1, base station;
If the described travelling carriage of S2 support the 4th generation vocoder mode, and current area load is greater than default threshold value, the base station specify described travelling carriage set up the 4th generation vocoder call out;
S3, mobile switching centre's simulator receive the business option tabulation that described travelling carriage is supported from the base station;
S4, when the travelling carriage at calling and called two ends all support the 4th generation vocoder mode, and in the 4th generation, do not set up for during vocoder mode to it in the base station, mobile switching centre's simulator sends updating message for described base station, require described base station with this call negotiation be the 4th generation vocoder mode, realize calling and called all be the 4th generation vocoder no code conversion operation.
2. method according to claim 1 is characterized in that, described step S4 comprises: if the travelling carriage at calling and called two ends have only an end support the 4th generation vocoder mode, and the base station set up the 4th generation vocoder mode; Mobile switching centre's simulator distributes vocoder to set up long-range code conversion operation calling.
3. method according to claim 1, it is characterized in that, described step S4 comprises: when the travelling carriage at calling and called two ends do not support the 4th generation vocoder mode, and support of enhanced variable rate coder pattern is then set up the no code conversion operation of Enhanced Variable Rate Coder pattern and is called out.
4. method according to claim 1 is characterized in that, described step S2 comprises: otherwise described base station specifies described travelling carriage to set up the Enhanced Variable Rate Coder call by pattern.
5. the negotiating vocoder mode device in the code division multiple access system comprises the base station, it is characterized in that described base station comprises: acquiring unit is used to obtain the current area load; Record cell is used to write down configurable thresholding; Comparing unit is used to obtain the comparative result between current area load and the default threshold value; And the call setup unit, be used for according to described comparative result specify travelling carriage set up the 4th generation vocoder mode; And the negotiating vocoder mode device also comprises the mobile switching centre's simulator that is connected with described base station, and this mobile switching centre's simulator comprises:
Receiving element is used for receiving from the base station business option tabulation of described travelling carriage support; Updating block, the travelling carriage that is used for searching the calling and called two ends in the tabulation of described business option all supported for the 4th generation during vocoder mode, give described base station send with this call negotiation be the 4th generation vocoder mode updating message, require described base station with this call negotiation be the 4th generation vocoder mode, realize calling and called all be the 4th generation vocoder no code conversion operation.
6. device according to claim 5, it is characterized in that, described mobile switching centre simulator also comprises: first module, be used in described business option tabulation, searching all support of enhanced variable rate coder patterns of calling and called, set up the no code conversion operation of Enhanced Variable Rate Coder pattern and call out.
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| CN1988544A (en) * | 2006-12-19 | 2007-06-27 | 中兴通讯股份有限公司 | Method for consulting multimedia coding and decoding capacity of 3G audio frequency gateway |
| CN1991977A (en) * | 2005-12-29 | 2007-07-04 | Ut斯达康通讯有限公司 | Voice coding rate confirming method for radio communication |
| CN101052154A (en) * | 2007-05-11 | 2007-10-10 | 华为技术有限公司 | IP multimedia sub system and its coding and decoding switching control method |
| US7328027B1 (en) * | 2004-05-11 | 2008-02-05 | Sprint Spectrum L.P. | Method for vocoder selection based on loads in coverage areas of a wireless wide area network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7328027B1 (en) * | 2004-05-11 | 2008-02-05 | Sprint Spectrum L.P. | Method for vocoder selection based on loads in coverage areas of a wireless wide area network |
| CN1991977A (en) * | 2005-12-29 | 2007-07-04 | Ut斯达康通讯有限公司 | Voice coding rate confirming method for radio communication |
| CN1988544A (en) * | 2006-12-19 | 2007-06-27 | 中兴通讯股份有限公司 | Method for consulting multimedia coding and decoding capacity of 3G audio frequency gateway |
| CN101052154A (en) * | 2007-05-11 | 2007-10-10 | 华为技术有限公司 | IP multimedia sub system and its coding and decoding switching control method |
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