CN1592438A - Adaptive multi-rate encoding method and device in mobile communication system - Google Patents
Adaptive multi-rate encoding method and device in mobile communication system Download PDFInfo
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Abstract
This invention provides a self-adaptive multiple speed coding method and its device used in mobile communication system. This method contains following steps: Coding the voice and building communication link; measuring the signal property parameter of this communication link, judging if this signal property parameter is bigger than the predetermined first threshold, if bigger than it, then to lower the coding speed of voice tune, otherwise, to keep the original coding speed; judged if this signal property parameter is smaller than the predetermined second threshold; if smaller than it, then to increase the coding speed; otherwise to keep the original speed. This device contains: The variable speed voice coder, receiving and transmitting channel, measurement device, control device.
Description
Technical field
The present invention relates to mobile communication system, be specifically related to the method and apparatus of adaptive multi-rate coding in the mobile communication system.
Background technology
Understand the present invention for the ease of persons skilled in the art, the term that uses in this specification be listed as follows:
AMR adaptive multi-rate codec adaptive multi-rate coding
BLER block error ratio Block Error Rate
CDMA code division multiple access code division multiple access inserts
CPICH RSCP CPICH received signal code power pilot channel received power
Node B third generation cellular system base station
FER frame error ratio frame error rate
The average subjective branch of MOS Mean Opinion Score
In comprising CDMA and GSM and TDMA and PCS communication system, voice use AMR coded system (Adaptive Multi-Rate codec), and this coded system can provide 8 kinds of code rates, is respectively: 12.2,10.2,7.95,7.4,6.7,5.9,5.15or4.75kbit/s.Usually, for adopting a certain speed to encode, we claim this coded system to be certain rate mode.So corresponding 8 kinds of code rates, the AMR speech coding has 8 kinds of rate modes.
Voice in the wireless telecommunication system propagate into the recipient from signal source, the principal element that voice quality is exerted an influence is source coding rate (being the AMR pattern of voice) and dissemination channel Block Error Rate (Block Error Ratio (BLER) is subjected to the influence of communication environments).Code rate is big more, and then the entrained voice messaging of signal is just many more, and the recipient just can reduce voice messaging more accurately, and the quality of voice is just good more so.Voice signal can convert digital bit in the transmission course in the digital radio communication system, digital bit is divided into piece and transmits in wireless channel, the interference that is subjected in transmission course is more little, the accuracy of the digital block that receives so is just high more, be that Block Error Rate (BLER) is just low more, the voice quality of Hui Fuing is just good more so.
Fig. 1 is 3GPP TR26.975[1] the different mode voice quality that provides is with the change curve of FER.Wherein, show the quality situation of different speech patterns under different frame error rate (Frame Error Ratio (FER) is similar in appearance to BLER) situation and weigh, the mode of measurement has adopted MOS (Mean Opinion Score) score value.MOS divides high more, and then voice quality is good more.The longitudinal axis represents to divide with maximum MOS 4 minutes difference among the figure.
Data among Fig. 1 come from the test data in gsm system, and the control to speech pattern in the wireless telecommunication system is had reference role.As we can see from the figure, FER less than 0.1% before, the MOS score value of voice is more stable, after FER was greater than 0.1%, the speed that voice quality descends was more and more faster.Under same FER situation, the voice of height mode have better quality basically.
When the AMR voice transmitted in wireless telecommunication system, the influence that voice quality is subjected to communication environments was also very big, and communication environments can influence the BLER of speech business.Communication environments by good variation process in because low mode has than the better fault-tolerance of height mode, so the speed that the speed ratio height mode voice quality that the voice quality of low mode reduces reduces is slow.When the environment variation arrives to a certain degree, the situation that the low mode voice quality is higher than the height mode voice quality will appear.Please refer to Fig. 2, Fig. 2 illustrates the curve of different mode voice quality with environmental change.
Among Fig. 2, transverse axis is represented the ratio (C/I) of signal and interference, and communication environments is poor more, and C/I is low more.Fig. 2 also comes from 3GPP TR2 6.975.As we can see from the figure, when C/I is reduced to 10dB～4dB, 12.2kbits/s voice quality variation, 7.95kbits/s voice quality become best, as C/I during at 4～1dB, 5.9kbits/s voice quality become best, and be lower than after the 1dB as C/I, the voice quality of 4.75kbits/s becomes best.
In wireless telecommunication system, along with number of users in the system, apart from the variation of factors such as base station distance, the frequent earthquake of the residing wireless environment of user, the speech pattern of the optimum that is suitable in different environment also can change thereupon.Therefore, the purpose of multi-velocity self-adapting voice control algolithm promptly is the difference according to environment, adjusts the user's voice pattern adaptively, to be user's service of offering the best as far as possible.
Because when adopting the different phonetic pattern, needed transmitting power is different, under equivalent environment, the general needed transmitting power of low mode is littler than height mode.So, and have a mind to reduce the pattern of voice sometimes for improving power system capacity or increase the purpose that covers.This all relates to the adaptive multi-rate speech control algolithm.
In the prior art, adopt adjusted the user's voice pattern according to the load variations of whole sub-district more.The general load state of measurement descending carrier or uplink interference level being judged system that adopts of measurement to the load of whole sub-district.When load surpasses the thresholding of a setting, illustrate that current load is heavier, then start control to the voice user, generally reduce the processing of pattern, reducing the demand of voice user, and then reduce the load of system to transmitting power; When load is lower than the thresholding of setting, also start control to the voice user, generally carry out the processing of lift mode, making full use of current sufficient resources, and then provide better voice quality for the user.
When carrying out above processing, the load-threshold that reduces mode adjudging is higher than the load-threshold that carries out the lift mode judgement.
Loading condition according to whole sub-district is adjusted speech pattern, can only carry out identical processing to the user who is adjusted, and promptly the user's voice pattern raises simultaneously or reduces simultaneously.Yet the user is residing position difference in the sub-district, its speech business of setting up model identical is different to the consumption of transmitting power, such as: the user distance base station that is in center of housing estate is nearer, the loss of power on the path is less, and its needed transmitting power of voice of setting up the 12.2kbits/s pattern may also be set up the professional desired power of 4.75kbits/s less than being in cell edge area user.If cell load raise and needed to reduce speech pattern this moment, what existing algorithm can reduce simultaneously with the user speech pattern of center of housing estate and cell edge, all user's voice quality are all reduced, this processing mode is reduced to lower pattern not as first user quality with cell edge, so that the user of center of housing estate can keep higher quality, improved the contribution rate of power to quality.
The sub-district that has may not dispose all standing of 12.2kbbits/s speech pattern in the sub-district for promoting cell capacity or increasing the reason that covers, and the user who goes to cell edge so need automatically reduce pattern to keep the continuity of link.Existing method can only reflect the situation of present load, can not reflect the distance of user distance base station, and the user moves the indication of needed mode adjustment and just can't obtain so, and then the continuity of customer service just can not be guaranteed.
Summary of the invention
The objective of the invention is shortcoming at above-mentioned prior art, a kind of method and apparatus that is used for the adaptive multi-rate coding of mobile communication system is provided, the situation of reflection present load and the distance of user distance base station, move needed mode adjustment indication to obtain the user, guaranteed the continuity of customer service.
The invention provides a kind of method of adaptive multi-rate coding of mobile communication system, comprise step:
Coded speech is also set up communication link;
Measure the signal quality parameter of described communication link;
Whether the signal quality parameter of judging described measurement is greater than the first predetermined thresholding; If greater than, the code rate of reduction speech; Otherwise, keep the code rate of former speech;
Whether the signal quality parameter of judging described measurement is less than predetermined second threshold; If less than, the code rate of increase speech; Otherwise, keep the code rate of former speech;
Wherein, described first thresholding is greater than described second thresholding.
Alternatively, the step of the code rate of described reduction speech comprises:
Measure the signal quality parameter of the code rate that reduces speech;
Whether the signal quality parameter of judging described changing down less than the 3rd predetermined thresholding, if less than, stop to reduce the code rate of speech; Otherwise continuation reduces the code rate of speech.
Preferably, the step of the code rate of described increase speech comprises:
Measure the signal quality parameter of the code rate that increases speech;
Judge described signal quality parameter of advancing the speed whether greater than the 4th predetermined thresholding, if greater than in, stop to increase the code rate of speech; Otherwise continuation increases the code rate of speech.
Alternatively, the step of described measure signal quality parameters comprises: period measurement or the described mass parameter of affair that excites according to predetermined condition.
Preferably, the step of described measure signal quality parameters comprises: period measurement or the described mass parameter of affair that excites according to predetermined condition.
Alternatively, the step of described measure signal quality parameters comprises:
Measure the transmitting power of described signal, and/or
Measure the CPICH RSCP (pilot channel received power) of described signal, and/or
Measure described signal CPICH Ec/No (pilot channel signal to noise ratio) and/or
Measure the signal to noise ratio of the link of described signal.
Preferably, the step of the code rate of described reduction speech comprises: reduce the code rate of speech or the code rate of multistage reduction speech step by step.
Alternatively, the step of the code rate of described increase speech comprises: increase the code rate of speech or the code rate of multistage increase speech step by step.
The present invention also provides a kind of device of adaptive multi-rate coding of mobile communication system, it is characterized in that, comprising:
The variable bit rate voice encryption device is used for the signal quality coded speech according to communication link;
Transceiver channel is used to set up described communication link;
Measurement mechanism is used to measure the signal quality parameter of described communication link;
Judgment means is used to judge that whether the signal quality parameter of described measurement is greater than the first predetermined thresholding with less than predetermined second threshold;
Control device is used for the difference according to judged result, reduces the code rate of speech respectively; Or keep the code rate of former speech; Or the code rate of increase speech;
Wherein, described first thresholding is greater than described second thresholding.
Alternatively, described measurement mechanism comprises:
Power-measuring device is used to measure the transmitting power of described signal, or is used to measure the CPICH RSCP (pilot channel received power) of described signal; And/or
Signal-to-noise ratio measurement apparatus is used to measure the CPICH Ec/No (pilot channel signal to noise ratio) of described signal, or measures the signal to noise ratio of the link of described signal.
Utilize the present invention, because the transmitting power measured value at customer service can reflect the loading condition of sub-district and the distance of user distance base station, can either adjust the AMR pattern according to cell load so adopt connection-oriented multi-velocity self-adapting voice control algolithm, so that better service to be provided, and in resource scarcity, reduce pattern to guarantee the continuity of link when resource is arranged; Can adjust the AMR pattern according to the distance of user distance base station again, so that the big covering performance of trying one's best to be provided.
Because different AMR patterns is provided with different B LER desired value, the service quality of otherness can be provided different mode, also more can guarantee the capacity of the continuity and the system of link.
Description of drawings
Fig. 1 is 3GPP TR2 6.975[1] the different mode voice quality that provides is with the change curve of FER;
Fig. 2 shows the curve of different mode voice quality with environmental change;
Fig. 3 shows the principle schematic of transmitting power report mechanism of the present invention;
Fig. 4 is a flow chart of adjusting the method for AMR pattern according to transmitting power;
Fig. 5 be in the WCDMA system different AMR patterns to the demand figure of transmitting power.
Embodiment
Method provided by the invention is a kind of connection-oriented speech pattern control algolithm, can adjust the pattern of user speech business according to user's power situation adaptively, the pattern of user's speech business can be adjusted adaptively according to the distance of user distance base station, also can carry out the transformation of pattern according to the load condition of sub-district.
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
1, adjusts the algorithm of AMR pattern according to transmitting power
In the wireless telecommunication system, because the effect of power control makes that the transmitting power size has reflected the situation that system and business are connected when guaranteeing voice quality, as the path loss situation under cell load and the communication environments etc.When system load big more, then aerial disturb big more, in order to reach certain signal to noise ratio, then each user's transmitting power need big more, vice versa.When system's propagation conditions change, perhaps the user is distant from the base station, and when having arrived the edge of sub-district, path loss can increase, thereby the transmitting power that travelling carriage needs also increases.And, when transmitted power reduces, can directly influence the signal to noise ratio of received signal, thereby influence receives the error rate of data, and then influence the quality of speech business to each user.
Because transmitting power has reflected air interface load and current connection state well, so when carrying out the control of AMR pattern, can select for use transmitting power as adjusting the required feedback information of AMR pattern.To up AMR pattern control, measure travelling carriage carrier transmit power, to descending AMR pattern control, then be the sign indicating number transmitting power of measuring base station (the Node B of third generation cellular system).Event triggered measurement report when transmitting power is crossed threshold value.The AMR controller just can be adjusted the AMR pattern according to the content of report.
Fig. 3 shows the principle schematic of transmitting power report mechanism of the present invention.For transmitting power is provided with two cover thresholdings, promptly Upper threshold and Lower Threshold identify with 1 series and 2 series respectively in the drawings among the figure.Comprise two thresholding: A and B in every serial thresholding, be respectively applied for and check ingoing power constrained state (perhaps power not constrained state) and withdraw from power limited state (perhaps power not constrained state).Report mechanism is specifically: passed through Upper threshold 6A1 thresholding from the bottom up when transmitting power, then reported the 6A1 incident; Pass through Upper threshold 6B1 thresholding from top to bottom when transmitting power, then reported the 6B1 incident; Pass through Lower Threshold 6B2 thresholding from top to bottom when transmitting power, then reported the 6B2 incident; Pass through Lower Threshold 6A2 thresholding from the bottom up when transmitting power, then reported the 6A2 incident.
The method that can deduct relative threshold by the maximum transmission power of link that is provided with of thresholding obtains.
The concrete grammar of adjusting the AMR pattern according to transmitting power is:
When receiving the 6A1 event report, the expression transmitting power is than higher, the load that concrete corresponding environment may be the sub-district has been in than higher state, perhaps the user is away from the base station, current AMR pattern may not continue to be supported, in order to keep the continuity of customer service, perhaps alleviate the load of sub-district, then judgement need reduce active user's AMR pattern.If user's AMR pattern is not still received the 6B1 incident after reducing once, then reduce the AMR pattern once more with some cycles, reduce to lowest mode up to the AMR pattern, perhaps receive the just processing of dwelling period reduction pattern of 6B1 incident or 6B2 event report.
When receiving the 6B2 event report, represent that current transmit power level is lower, concrete corresponding environment may be that system load is lower, perhaps the user distance base station is closer, also have unnecessary power resource to use, so just adjudicate the current AMR pattern of user that to raise, so that better voice service quality to be provided.After user's AMR pattern raises once, do not receive the 6A2 incident within a certain period of time, then can be with raise once more user's AMR pattern of some cycles, reach height mode up to user's AMR pattern, perhaps receive the just processing of dwelling period lift mode of 6A2 incident or 6A1 event report.
When receiving 6B1 or 6A2 incident, illustrate transmitting power from be restricted or state relatively more than needed come out, concrete processing need be decided on the state before this event report:
● when speech pattern is in when periodically adjusting upward,, and enter normal condition, if receive the 6B1 incident then do not handle if receive the 6A2 event report then stop to adjust the processing of AMR pattern;
● when speech pattern is in when periodically downwards adjusting,, and enter normal condition, if receive the 6A2 incident then do not handle if receive the 6B1 incident then dwelling period is adjusted the processing of AMR pattern;
When speech pattern is not in when periodically adjusting state, if receive 6B1 incident or 6A2 incident then do not handle.
Fig. 4 is a flow chart of adjusting the method for AMR pattern according to transmitting power.
At first, coded speech is also set up communication link, to set up the speech obligation;
Then, set up the link transmitting power and measure control, to measure the signal power of described communication link;
Judge that whether the signal power of measuring is greater than the first predetermined thresholding; If greater than, being the 6A1 incident among the figure, the family stops other states, enters the state of adjusting the AMR pattern periodically downwards, reduces the code rate of speech; Otherwise, keep the code rate of former speech;
Whether the signal quality parameter of judging described measurement is less than predetermined second threshold; If less than, being the 6B2 incident among the figure, the user stops other states, enters the state that periodically adjusts upward the AMR pattern; Increase the code rate of speech; Otherwise, keep the code rate of former speech;
Wherein, described first thresholding is greater than described second thresholding;
If find that signal transmission power less than the 3rd predetermined thresholding, is the 6B1 incident among the figure, if in the process of the code rate that reduces speech, stop to reduce the code rate of speech, last cycle property is adjusted the state of AMR pattern downwards, enters normal condition.
If the transmitting power of finding signal is the 6A2 incident among the figure greater than the 4th predetermined thresholding, if in the process of the code rate that increases speech, last cycle property adjusts upward the state of AMR pattern, enters normal condition, stops to increase the code rate of speech.
In an embodiment, be depicted as according to affair power, in fact also can period measurement power.
In the wireless telecommunication system, transmitting power to the uplink measurement travelling carriage, triggering factors as up AMR mode adjustment, to the down-run survey down-link transmitting power, triggering factors as the AMR mode adjustment, therefore the control of the AMR pattern of up-downgoing is asymmetric, this means that uplink and downlink can be adopted different AMR patterns in speech communication.
2, the setting of AMR mode service quality
According to the relation of AMR voice quality and communication environments, under different environment, the pattern that quality is the highest can change, and specifically sees also Fig. 2.Optimal AMR mode adjustment mode is the relation according to AMR voice quality and communication environments, find the pattern of the optimum quality correspondence pairing C/I point that changes, C/I to reality in concrete mode adjustment process measures, then the pattern of the AMR quality correspondence of configuration optimum.But this mode accuracy is difficult to guarantee that practical operation is also had any problem.In order to cooperate the algorithm of adjusting the AMR pattern according to transmitting power, we provide better service according to height mode in this algorithm, and low mode provides the principle of lower service that AMR mode service quality is provided with.
Under identical communication environments, be under the identical BLER situation, the quality of height mode is higher than low mode, so we are not more than the BLER desired value of low mode for the height mode configuration, be not less than the BLER desired value of height mode for the low mode configuration, under the effect of wireless telecommunication system power control, the voice quality of height mode and low mode is difference to some extent just, to be provided under the varying environment (such as: loading condition, apart from the base station near-far situation) differential service quality.In addition, because the BLER desired value of height mode is not higher than the BLER desired value of low mode, just can guarantee that low mode is lower than height mode to the demand of transmitting power, so also help adjusting the AMR pattern with the continuity of assurance link and the capacity of system according to transmitting power.
Though in an embodiment of the present invention, the report of transmitting power is adopted the mode of event report, will be appreciated that, can not adopt the mode of event report to the report of transmitting power, adopt periodic report manner, by the performance number and the thresholding of report being compared, and then whether judgement raises or reduces the AMR pattern at every turn.
Though in an embodiment of the present invention, for transmitting power is provided with 4 thresholdings altogether, will be appreciated that, also two thresholdings can only be set, i.e. a Upper threshold and a Lower Threshold, when surpassing Upper threshold, transmitting power just reduces the processing of AMR pattern, and the processing of the AMR pattern that when transmitting power is lower than Lower Threshold, raises.
In addition, the progression of each rising or reduction AMR pattern can have multiple, such as: raise or reduction first class mode or multilevel mode at every turn, can depend on the needs, as, can set a thresholding, if less than thresholding, if the each rising or the reduction one-level greater than thresholding, raises or the reduction predetermined level at every turn.Can also determine according to the interval.
In an embodiment of the present invention, distance judgement to the user distance base station, be relatively judging with transmitting power and thresholding, also can judge by moving table measuring CPICH RSCP (pilot channel received power), when being lower than Lower Threshold, reduces CPICH RSCP the processing of AMR pattern, and the processing of the AMR pattern that when CPICH RSCP is higher than Upper threshold, raises.
Among the present invention, at the device of the adaptive multi-rate coding of mobile communication system, comprising: the variable bit rate voice encryption device is used for the signal quality coded speech according to communication link; Transceiver channel is used to set up described communication link; Measurement mechanism is used to measure the signal quality parameter of described communication link; Judgment means is used to judge that whether the signal quality parameter of described measurement is greater than the first predetermined thresholding with less than predetermined second threshold; Control device is used for the difference according to judged result, reduces the code rate of speech respectively; Or keep the code rate of former speech; Or the code rate of increase speech.
Fig. 5 be in the WCDMA system different AMR patterns to the demand figure of transmitting power.This is in experiment WCDMA system, under identical place and environment under the different AMR patterns of test speech business to the demand of transmitting power.Among the figure, transverse axis is represented the pattern of AMR voice, and the longitudinal axis is represented the needed transmitting power of each pattern.As we can see from the figure, the low mode stage to some fluctuation of the demand of transmitting power, but the trend of curvilinear motion is along with the increasing of pattern, also big more to the demand of transmitting power.Can illustrate, in the base station total transmitting power one regularly, system can hold more low mode voice user, can increase the access customer number order.
In experiment, be provided with respectively maximum transmission power for-20dbm ,-10dbm, 0dbm, 3dbm, the tested speech business sees the following form in following coverage that can reach of different mode situation:
By these experimental results as can be seen, low mode can bring bigger covering gain.
In the present invention, utilized the transmitting power measured value of customer service can reflect the loading condition of sub-district and this result of distance of user distance base station, adopt connection-oriented multi-velocity self-adapting voice control algolithm to adjust the AMR pattern according to cell load, so that better service to be provided, and in resource scarcity, reduce pattern to guarantee the continuity of link when resource is arranged; Can adjust the AMR pattern according to the distance of user distance base station again, so that the big covering performance of trying one's best to be provided.
Because different AMR patterns is provided with different B LER desired value, the service quality of otherness can be provided different mode, also more can guarantee the continuity of link.
The present invention also provides balanced QoS to wireless telecommunications utilization merchant and has enlarged the selection of power system capacity.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and does not break away from spirit of the present invention, for example, though in specification, mainly describe the present invention with cdma system, those skilled in the art will know that, the present invention can be used to comprise the tdma system even the FDMA system of gsm system and pcs system, therefore, wishes that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1. the method for the adaptive multi-rate coding of a mobile communication system is characterized in that, comprises step:
Coded speech is also set up communication link;
Measure the signal quality parameter of described communication link;
Whether the signal quality parameter of judging described measurement is greater than the first predetermined thresholding; If greater than, the code rate of reduction speech; Otherwise, keep the code rate of former speech;
Whether the signal quality parameter of judging described measurement is less than predetermined second threshold; If less than, the code rate of increase speech; Otherwise, keep the code rate of former speech;
Wherein, described first thresholding is greater than described second thresholding.
2. the step of the code rate of the method for claim 1, wherein described reduction speech comprises:
Measure the signal quality parameter of the code rate that reduces speech;
Whether the signal quality parameter of judging described changing down less than the 3rd predetermined thresholding, if less than, stop to reduce the code rate of speech; Otherwise continuation reduces the code rate of speech.
3. the step of the code rate of the method for claim 1, wherein described increase speech comprises:
Measure the signal quality parameter of the code rate that increases speech;
Judge described signal quality parameter of advancing the speed whether greater than the 4th predetermined thresholding, if greater than in, stop to increase the code rate of speech; Otherwise continuation increases the code rate of speech.
4. as the described method of one of claim 1-3, wherein, the step of described measure signal quality parameters comprises: period measurement or the described mass parameter of affair that excites according to predetermined condition.
5. as the described method of one of claim 1-3, wherein, the step of described measure signal quality parameters comprises: period measurement or the described mass parameter of affair that excites according to predetermined condition.
6. as the described method of one of claim 1-5, wherein, the step of described measure signal quality parameters comprises:
Measure the transmitting power of described signal, and/or
Measure the CPICH RSCP (pilot channel received power) of described signal, and/or
Measure described signal CPICH Ec/No (pilot channel signal to noise ratio) and/or
Measure the signal to noise ratio of the link of described signal.
7. as the described method of one of claim 1-3, wherein, the step of the code rate of described reduction speech comprises: reduce the code rate of speech or the code rate of multistage reduction speech step by step.
8. as the described method of one of claim 1-3, wherein, the step of the code rate of described increase speech comprises: increase the code rate of speech or the code rate of multistage increase speech step by step.
9. the device of the adaptive multi-rate coding of a mobile communication system is characterized in that, comprising:
The variable bit rate voice encryption device is used for the signal quality coded speech according to communication link;
Transceiver channel is used to set up described communication link;
Measurement mechanism is used to measure the signal quality parameter of described communication link;
Judgment means is used to judge that whether the signal quality parameter of described measurement is greater than the first predetermined thresholding with less than predetermined second threshold;
Control device is used for the difference according to judged result, reduces the code rate of speech respectively; Or keep the code rate of former speech; Or the code rate of increase speech;
Wherein, described first thresholding is greater than described second thresholding.
10. device as claimed in claim 9, wherein, described measurement mechanism comprises:
Power-measuring device is used to measure the transmitting power of described signal, or is used to measure the CPICH RSCP (pilot channel received power) of described signal; And/or
Signal-to-noise ratio measurement apparatus is used to measure the CPICH Ec/No (pilot channel signal to noise ratio) of described signal, or measures the signal to noise ratio of the link of described signal.
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| CN100452693C (en) * | 2005-10-31 | 2009-01-14 | 连展科技(天津)有限公司 | AMR method for effectively guaranteeing speek voice quality in wireless network |
| CN100461663C (en) * | 2005-08-01 | 2009-02-11 | 华为技术有限公司 | Code/decode type confirming method |
| WO2011075869A1 (en) * | 2009-12-24 | 2011-06-30 | Intel Corporation | Method, apparatus and system of managing an encoder output rate based upon wireless communication link feedback |
| CN102170688A (en) * | 2011-05-26 | 2011-08-31 | 中国科学技术大学 | Load-based power configuration method and device capable of reducing energy consumption of base station |
| CN104320385A (en) * | 2014-10-10 | 2015-01-28 | 中麦通信网络有限公司 | Mobile terminal voice communication implementation method and device |
| CN105722193A (en) * | 2014-12-18 | 2016-06-29 | 联发科技股份有限公司 | Methods For Reducing The Power Consumption In Voice Communications And Communications Apparatus Utilizing The Same |
| CN106817339A (en) * | 2015-11-27 | 2017-06-09 | 中国电信股份有限公司 | Adjust method, transmitting terminal and the system of voice rate |
| CN113055924A (en) * | 2019-12-26 | 2021-06-29 | 中国电信股份有限公司 | Voice quality evaluation method and device and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461663C (en) * | 2005-08-01 | 2009-02-11 | 华为技术有限公司 | Code/decode type confirming method |
| CN100452693C (en) * | 2005-10-31 | 2009-01-14 | 连展科技(天津)有限公司 | AMR method for effectively guaranteeing speek voice quality in wireless network |
| WO2011075869A1 (en) * | 2009-12-24 | 2011-06-30 | Intel Corporation | Method, apparatus and system of managing an encoder output rate based upon wireless communication link feedback |
| US9386481B2 (en) | 2009-12-24 | 2016-07-05 | Intel Corporation | Method, apparatus and system of managing an encoder output rate based upon wireless communication link feedback |
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| CN106817339A (en) * | 2015-11-27 | 2017-06-09 | 中国电信股份有限公司 | Adjust method, transmitting terminal and the system of voice rate |
| CN113055924A (en) * | 2019-12-26 | 2021-06-29 | 中国电信股份有限公司 | Voice quality evaluation method and device and computer readable storage medium |
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