CN101132227B - Monitoring method and system for wireless communication signal channel quality - Google Patents
Monitoring method and system for wireless communication signal channel quality Download PDFInfo
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- CN101132227B CN101132227B CN2006101125809A CN200610112580A CN101132227B CN 101132227 B CN101132227 B CN 101132227B CN 2006101125809 A CN2006101125809 A CN 2006101125809A CN 200610112580 A CN200610112580 A CN 200610112580A CN 101132227 B CN101132227 B CN 101132227B
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Abstract
This invention discloses a monitor method for quality of radio communication channels including: a base station receives CQI value of a transfer channel got by UE based on the mapping relation of S/N ratio of received signals and CQI value and receives data decoding result fed by UE to determine a modulation mode and modulate data blocks sent to the UE and/or emission power based on said CQI and its offset volume determined by the decoding result. This invention also provides a monitor system including: a calculation unit used in getting CQI of transfer channels, a set and modulation unit determining a modulation mode, modulating sent data blocks and emission power based on the CQI value and its offset volume.
Description
Technical field
The present invention relates to wireless communication technology field, be specifically related to the method for supervising and the system of wireless communication signal channel quality.
Background technology
In order to improve user's data transmission rate and throughput of system, 3GPP standardization body has introduced high speed downlink packet access (HSDPA, High Speed Downlink Package Access) technology to the asymmetric demand of up-downgoing data service.HSDPA has adopted high order modulation; Through Adaptive Modulation and Coding (AMC; Adaptive Modulation Code), mix technology such as automatic request retransmission (HARQ, Hybrid Automatic Repeat Request) and fast dispatch and reach the purpose that improves throughput of system.
Adaptive modulation and coding AMC technology is as one of key technology of HSDPA; Be a kind of modulation and the coded system that can transmit data through adjustment adaptively; Come profit to repay the influence of fading that is caused to received signal owing to channel variation, thereby improve physical layer link self adaptation (Link Adaptation) technology of the signal-to-noise performance of signal.The basic principle of adaptive modulation and coding (AMC) is exactly to change the form of modulation and coding and it is adapted with channel condition in the system constraint scope, and channel condition then can be estimated through sending feedback.In the AMC system, the general user under desirable channel condition with the modulation system of higher-order and higher code rate, and at the next modulation coding mode of less-than-ideal channel condition with lower-order.
Adopt the AMC technology, can make the user who sits pretty have higher data rate, improve the honeycomb average throughput thus; In the link circuit self-adapting process, can reduce the influence of interference through the adjustment Modulation and Coding Scheme.
But; AMC is responsive to measure error and retardation ratio; For the modulation system of selecting to be fit to, must at first know quality of channel, may make the transfer of data data transfer rate of system's selection mistake to the mistake of channel estimating; Make too high transmission power, the waste power system capacity error rate perhaps occurs and raises because of power is too low; Because the time-varying characteristics of mobile channel, the delay of channel measurement report has reduced the reliability of channel quality estimation; In addition, the variation of interference also increases the error of measurement.
The Block Error Rate of data is no more than 0.1 when in 3GPP, requiring only to adopt the AMC technology.AMC adjusts transmission rate through changing modulation system with channel encoding rate, and (R5 version) modulated and be divided into two kinds of QPSK and 16QAM among the HSDPA.User (like the user nearer from the base station) at vantage point can be assigned with higher modulation levels and higher code rate (the for example Turbo encoding rate of 16QAM and R=3/4), and can be assigned with lower modulation levels and code rate (the for example Turbo encoding rate of QPSK and R=1/2) the user (near the user of cell edge) of unfavorable position.
In the system that adopts the AMC technology; Portable terminal calculating channel quality; And with the affirmation (ACK) of channel quality indication (CQI, Channel Quality Indicator) and data or non-affirmation (NACK) information (receiving the CRC of data) message feedback to base station (Node B).Node B confirms the coded modulation grade of data (MCS, Modulation and coding sets) value (data block length and modulation system) next time according to channel quality indication and the out of Memory such as the physical resource etc. of portable terminal feedback.
In the prior art, the AMC performance is responsive for measure error and retardation ratio.Can portable terminal feedback metrical information react channel condition accurately and real-time has very big influence to the correct selection of coded modulation grade (MCS).Equally; Channel measurement result report delays also can reducing the reliability of channel quality estimation; Causing the main cause of delaying is processing time, base station (Node B) processing time and the time delays such as multiplexing and scheduling of portable terminal, delays referring to portable terminal here and obtains channel condition to the time between base station (Node B) selection MCS.
When only indicating to confirm MCS, because the influence of channel quality indication feedback delay makes the accuracy of channel quality indication reduce, because the complexity of actual environment makes that the measurement of channel quality indication is inaccurate through the channel quality of portable terminal feedback.
These all can make the Block Error Rate (BLER, Block Error Ratio) of data surpass 0.1 target call, thereby have reduced the performance of system.
In addition, when channel quality is higher than the MCS that Node B can indicate, still keep the transmitting power of shared channel constant, will bring unnecessary interference.
Summary of the invention
Given this, the technical problem that the present invention will solve provides a kind of method for supervising and system of wireless communication signal channel quality, to improve system effectiveness.
Method for supervising according to a kind of wireless communication signal channel quality provided by the invention comprises:
The base station receives user terminal obtains transfer channel according to the mapping relations of signal to noise ratio snr that receives signal and channel quality indicator (CQI) value CQI value;
What base station reception user terminal fed back carries out decoded results to data, if decoding is correct, the base station receives the affirmation ACK message that user terminal feeds back; If decoding error, the base station receives the NACK message unconfirmed of user terminal feedback;
Modulation system is confirmed according to said CQI value with by the CQI value side-play amount that decoded result is confirmed in the base station, and correspondingly adjust send to user terminal the data block size or/and transmitting power;
Saidly confirm that by decoded result the process of CQI value side-play amount comprises: confirm ACK message CQI value side-play amount to be reduced the pre-determined amount Δ when the base station receives
CQIWhen the base station receives NACK message unconfirmed, CQI value side-play amount is increased pre-determined amount δ
CQI, Δ wherein
CQI=K* δ
CQI, K=(1-BLER
Tar)/BLER
Tar, BLER
TarFor receiving the desired value of data block.
Ground preferably is CQI value side-play amount setting range in advance, and said CQI value side-play amount is adjusted in this scope.
The initial value of K is ((1-BLER
Tar)/BLER
Tar), as block error rate BLER＞BLER
Tar, the K value raises a step-length L
BAs BLER＜BLER
Tar, step-length L of K value downward modulation
B
Said modulation system comprises QPSK modulation and 16QAM modulation, when said SNR value is lower than predetermined value, adopts QPSK, when said SNR value is higher than predetermined value, adopts 16QAM.
Adjust said data block size TBS according to encoding rate R and available physical resource, wherein encoding rate R is relevant with channel quality indicated value.
Confirm ACK message when the base station receives, then transmission block is reduced the pre-determined amount Δ
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased pre-determined amount δ
TBS
Said transmission block reduces the pre-determined amount Δ
TBSFor said transmission block increases scheduled volume δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
Confirm ACK message when the base station receives, then power offset is reduced the pre-determined amount Δ
PWhen the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
Said power offset reduces the pre-determined amount Δ
PFor said power offset increases pre-determined amount δ
PK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
When the encoding rate that sends data reached available maximum encoding rate, the transmitting power of base station was sent with power offset definite by maximum available power, and transmitting power is less than maximum available power.
The encoding rate of the data of sending does not reach available maximum encoding rate, and data are sent according to maximum available power in the base station.
A kind of supervisory control system of wireless communication signal channel quality also is provided according to the present invention, comprises:
The measuring and calculating unit is arranged on user terminal, is used to calculate the signal to noise ratio snr that receives signal, and obtains the CQI value of transfer channel according to the mapping relations of this signal to noise ratio and channel quality indicator (CQI) value;
Transmitting element is used for resulting CQI value is sent to the base station;
Data processing unit is arranged on user terminal, is used for the data that receive are decoded, and decoded result is fed back to the base station, if decoding is correct, the base station receives the affirmation ACK message of user terminal feedback; If decoding error, the base station receives the NACK message unconfirmed of user terminal feedback;
Be provided with and adjustment unit, be arranged on the base station,, confirm modulation system according to said CQI value and the CQI value side-play amount confirmed by decoded result, and correspondingly adjust send to UE the data block size or/and transmitting power; Saidly confirm that by decoded result the process of CQI value side-play amount comprises:
When the base station receives affirmation ACK message, CQI value side-play amount is reduced the pre-determined amount Δ
CQI
When the base station receives NACK message unconfirmed, CQI value side-play amount is increased pre-determined amount δ
CQIΔ wherein
CQI=K* δ
CQI, K=(1-BLER
Tar)/BLER
Tar, BLER
TarFor receiving the desired value of data block.
Confirm ACK message when the base station receives, then power offset is reduced the pre-determined amount Δ
PWhen the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
Confirm ACK message when the base station receives, then transmission block is reduced the pre-determined amount Δ
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased pre-determined amount δ
TBS
Said transmission block reduces the pre-determined amount Δ
TBSBe said increase pre-determined amount δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
In sum; The present invention revises the channel quality indicated value of user terminal feedback according to said channel quality indicated value with by the CQI value side-play amount that the definite ACK/NACK message of decoding is confirmed; Adjustment sends to the data block size of UE or/and transmitting power realizes the monitoring of wireless communication signal channel quality, can reduce channel quality indication feedback delay and weaken the influence of the complexity of actual environment to the channel quality indication; Thereby can effectively control the Block Error Rate of data block when adopting the AMC technology; According to channel circumstance transmitting power is adjusted simultaneously, can be reduced interference, improve system effectiveness.
Description of drawings
Fig. 1 is the monitoring flow chart of the wireless communication signal channel quality of the embodiment of the invention;
Fig. 2 is that the supervisory control system of the wireless communication signal channel quality of the embodiment of the invention constitutes sketch map.
Embodiment
Core concept of the present invention is that user terminal is decoded to the data that receive; And decoded result is passed through the ACK/NACK message feedback give the base station; Thereby the channel quality indicated value to the user terminal feedback is revised, and correspondingly according to channel circumstance data block size, transmitting power is adjusted.
Be mapped to the influence that channel quality indicates the complexity of untimely accurate reflection channel quality indication feedback delay and actual environment that channel quality is indicated owing to directly will receive the SNR limit of signal; And the complexity of ACK/NACK information (receiving the CRC check result of data) and channel quality indication feedback delay and actual environment is directly related to the influence of channel quality indication; Therefore; The present invention utilizes ACK/NACK information that the channel quality indication of user terminal feedback is revised; Can reflect channel quality indication more exactly, thus when adopting the AMC technology the effective Block Error Rate of control data piece, and can improve system effectiveness.
User terminal passes through ascending control channel; Share information channel (HS-SICH) like the HS-DSCH in the HSDPA system; The uplink information that feedback is relevant; Mainly comprise ACK/NACK information and channel quality indication (CQI), the channel quality indicator (CQI) of user terminal feedback comprises to be recommended transmission block size (RTBS, Recommended Transmission Block Size) and recommends modulation format (RMF; Recommended Modification Format), wherein RTBS confirms according to encoding rate R and available physical resource.Suppose that available physical resource is a Ndata bit, RTBS=R*Ndata so, the mapping relations of SNR and encoding rate R can be confirmed the corresponding relation curve of a SNR and R through emulation.Each SNR value can be found corresponding unique R value through this curve.
In concrete the application, for simplicity, can some discrete RTBS values of predefine.As shown in table 1:
At this moment, can indicate these concrete data block length values with 0 to 63 numbering.
Possibly there is certain error in CQI to user terminal UE feedback, in order to eliminate or to reduce to feed back CQI and actual CQI deviation, need adjust accordingly.
For making principle of the present invention, characteristic and advantage clearer, be that example is described in detail concrete implementation of the present invention with the HSDPA system below.
In order to improve descending data transmission rate, 3GPP Release5 has introduced the HSDPA technology.HSDPA is a kind of link adaptation techniques, and as user during near base-station node, channel condition is good, and system is with very high rate transmissioning data; And as user during away from base-station node, bad channel conditions, system adopts lower speed.This link adaptation techniques mainly is to utilize the indication of user terminal feedback channel quality, and the base station is according to the definite coded modulation grade (MCS) of sending data of channel quality indication.MCS is made up of many groups RTBS and RMF, and RMF comprises QPSK modulation and 16QAM modulation system, when SNR value is low, adopts the QPSK modulation, and the value of SNR when higher employing 16QAM modulate.
With reference to Fig. 1; The present invention is according to decoding check results correction channel quality indicated value; The data block size that sends to UE according to said channel quality indicated value with by the CQI value side-play amount adjustment that decoded result is confirmed is or/and transmitting power; Realize the method for supervising of wireless communication signal channel quality, concrete steps are following:
Step S01, UE be according to the high speed downlink shared channel HS-DSCH data computation signal to noise ratio snr that receives, and the CQI value that obtains feeding back according to the mapping curve of SNR and CQI, and report the base station to CQI.
For the QPSK modulation, SNR can adopt following method to calculate:
Suppose a
iBe the soft bit after the demodulation, ask a
iMould | a
i, the average of asking
And variance
Then
Soft bit is that (LLR, Log-LikelihoodRatio), likelihood ratio is to receive signal to 0 probability and ratio to 1 probability to the log-likelihood ratio that obtains of soft demodulation, and take the logarithm (log).
Step S02, UE decodes to the HS-DSCH data that receive, if decoding is correct, to base station feedback ACK message; If decoding error feedback NACK message.
Step S03, the base station calculates the maximum available power of HSDPA, and increases the transmitting power of a power offset as HS-PDSCH.
Encoding rate is the ratio of the bit of effective information bit and channel.Maximum encoding rate is no more than 1.The power of the high more needs of encoding rate is correspondingly also high more, and this corresponding relation is confirmed to the CQI corresponding relation by SNR.
If the encoding rate of the data of sending does not reach available maximum encoding rate, HS-PDSCH sends according to maximum available power;
If the encoding rate of the data of sending has reached available maximum encoding rate, the transmitting power of HS-PDSCH is sent by maximum available power and the power offset decision.Wherein power offset can preestablish, and the transmitting power of HS-PDSCH can not surpass the HS-PDSCH maximum available power.
If the encoding rate of the data of sending has reached available maximum encoding rate, and this data block is by correct decoding, and promptly the base station receives and confirms ACK message, and power offset is reduced pre-determined amount Δ P;
If the encoding rate of the data of sending has reached available maximum encoding rate, and this data block deciphered by mistake, and promptly the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
The pre-determined amount Δ that said power offset reduces
PFor said power offset increases pre-determined amount δ
PK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar), BLER
TarFor receiving the desired value of data block.
In order to reach 10% Block Error Rate (BLER, Block Error Ratio) target call.The pre-determined amount Δ that said power offset reduces
PFor said power offset increases pre-determined amount δ
PNine times.
Step S04, the base station is according to the CQI message of UE feedback with by the CQI side-play amount that ACK/NACK message obtains, and confirms to send to the data block size and the modulation system of the HS-DSCH data of UE.
If the data of sending in sending first by correct decoding, promptly the base station receives and confirms ACK message CQI value side-play amount to be reduced the pre-determined amount Δ
CQI
If by wrong decoding, promptly the base station received NACK message unconfirmed during the data of sending were sent first, CQI value side-play amount is increased pre-determined amount δ
CQI
Δ wherein
CQI=((1-BLER
Tar)/BLER
Tar) * δ
CQI, BLER
TarFor receiving the desired value of data block.
In order to reach 10% BEER target call, promptly as target BLER
Tar=0.1 o'clock, with the pre-determined amount Δ of said CQI value side-play amount reduction
CQIBe set to said increase pre-determined amount δ
CQINine times.
Be CQI value side-play amount setting range in advance, promptly preestablish the maximum and the minimum value of CQI side-play amount, said CQI value side-play amount is adjusted in this scope.
Δ
CQIBe said increase pre-determined amount δ
CQIK doubly, the initial value of K is ((1-BLER
Tar)/BLER
Tar), according to the statistics of initial data block BLER K is adjusted, when adjusting, as BLER＞BLER at every turn
Tar, the K value raises a step-length L
BAs BLER＜BLERR
Tar, step-length L of K value downward modulation
B, step-length L
BCan set according to specific requirement.
When the CQI side-play amount reaches maximum, no longer increase, no longer reduce when being lower than minimum value.
For example, receive the ACK of initialization data block, the CQI cumulant raises a step-length step, receives the NACK of initialization data block, 9 step of CQI cumulant downward modulation.
Suppose step=0.1
If initialization BLER=0.1, the ACK quantity of the UE feedback NACK that equals 9 times so, the cumulant of CQI is 0 basically so.With respect to the CQI that UE reports, MCS (CQI) basically identical that Node B confirms;
If initialization BLER＜0.1, the ACK quantity of UE feedback is greater than 9 times NACK so, and CQI adjustment cumulant is greater than 0.With respect to the CQI that UE reports, the MCS (CQI) that Node B confirms can raise, and BLER can bring up to 0.1 and reach balance;
If initialization BLER＞0.1, the ACK quantity of UE feedback is less than 9 times NACK so, and CQI adjustment cumulant is less than 0.With respect to the CQI that UE reports, the MCS (CQI) that Node B confirms can reduce, and BLER can be reduced to 0.1 and reach balance.
Said modulation system comprises QPSK modulation and 16QAM modulation, when said SNR value is lower than predetermined value, adopts QPSK, when said SNR value is higher than predetermined value, adopts 16QAM.
Adjust said transport block size (TBS Transmission Block Size) according to encoding rate R and available physical resource, wherein encoding rate R is relevant with channel quality indicated value.
Confirm ACK message when the base station receives, then transmission block is reduced the pre-determined amount Δ
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased pre-determined amount δ
TBS
Said transmission block reduces the pre-determined amount Δ
TBSFor said transmission block increases scheduled volume δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar), BLER
TarFor receiving the desired value of data block.
In order to reach 10% BLER target call, said transmission block reduces the pre-determined amount Δ
TBSFor said transmission block increases pre-determined amount δ
TBSNine times.
For ease of describing, define some variablees at this:
RTBS
AddBe to calculate the TBS increment that next time sends data;
Max is RTBS
AddThe upper limit that does not change; Min is RTBS
AddThe lower limit that does not change,
F
iBe the re-transmission flag bit of data block i, if F
i=1 expression retransmits; F
i=0 expression initialization.
Suppose S
iBe i the data block (comprising retransmitted data blocks) that NodeB sends, corresponding ACK/NAC message is CRC
i
Realize as follows according to CQI modification method of the present invention is concrete:
At i constantly, as CQI
InDuring input;
If (Fi==0) is if send first
If ((CRCi==1) && (RTB Sadd＞Min)) data block received by mistake and RTBSadd greater than Min
RTBSadd=RTBSadd-9*step; 9 step-lengths fall in the RTBS cumulant, and step can get 0.1 preferably.
Else if ((CRCi==0) && (RTB Sadd＜Max)) the correct reception of data block quilt and RTBSadd＜Max
RTBSadd=RTBSadd+step; 1 step-length of RTBS cumulant rising.
endif
endif
If (RTBSin+Round (RTB Sadd)＞0) is if RTBSin+Round (RTBSadd)＞0
CQIout=(RTBSin+Round (RTBSadd), RMFin) Round (x) expression is done x and is rounded up
Else
The final CQI of CQIout=(RTBSin, RMFin) is output as (RTBSin, RMFin) endif
The recommended value of Step is 0.1, and Max equals 3, Min=-3.
Simulating, verifying is when CQI can effectively improve systematic function as the indicated value of sending data MCS next time.
Power regulating method according to the present invention is specific as follows:
When the code rate of CQI feedback has reached maximum code rate, RTBS
AddStill continue to rise, reduce the HS-DSCH channel transmitting power this moment.
If ((CRCi==1)) is if the wrong data block that receives
Padd=Padd+9*Pstep; 9 step-lengths of power cumulant rising
Else if ((CRCi==0)) is if data block is received by mistake
Padd=Padd-Pstep; 9 step-lengths of power cumulant decline
If ((V
CQI≈ V
Max) && (Padd＜0)) if encoding rate for the maximum encoding rate that can choose and be that the power cumulant is less than 0
The P=PHS-DSCH+Padd power output adds the power cumulant for the power of distributing to the HS-DSCH channel before revising.
A kind of supervisory control system of wireless communication signal channel quality also is provided according to the present invention, and with reference to Fig. 2, this system comprises:
The measuring and calculating unit is arranged on user terminal, is used to calculate the signal to noise ratio snr that receives signal, and obtains the CQI value of transfer channel according to the mapping relations of this signal to noise ratio and channel quality indicator (CQI) value;
Transmitting element is used for resulting CQI value is sent to the base station;
Data processing unit is arranged on user terminal, is used for the data that receive are decoded, and decoded result is fed back to the base station;
Be provided with and adjustment unit, be arranged on the base station,, confirm modulation system according to said CQI value and the CQI value side-play amount confirmed by decoded result, and correspondingly adjust send to UE the data block size or/and transmitting power.
Correct when decoded result, confirm ACK message to base station feedback; If decoding error is then to base station feedback NACK message unconfirmed.
When the base station receives affirmation ACK message, CQI value side-play amount is reduced the pre-determined amount Δ
CQI
When the base station receives NACK message unconfirmed, CQI value side-play amount is increased pre-determined amount δ
CQI
Confirm ACK message when the base station receives, then power offset is reduced the pre-determined amount Δ
PWhen the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
Confirm ACK message when the base station receives, then transmission block is reduced predetermined amount delta
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased scheduled volume δ
TBS
Said transmission block reduces the pre-determined amount Δ
TBSBe said increase scheduled volume δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
The foregoing description is used to explain and explains principle of the present invention.Be appreciated that embodiment of the present invention is not limited thereto.To those skilled in the art, various changes of under the prerequisite that does not break away from essence of the present invention and scope, carrying out and modification all are encompassed within protection scope of the present invention.
Claims (15)
1. the method for supervising of a wireless communication signal channel quality is characterized in that, comprising:
The base station receives user terminal obtains transfer channel according to the mapping relations of the signal to noise ratio (snr) that receives signal and channel quality indication (CQI) value CQI value;
What base station reception user terminal fed back carries out decoded results to data, if decoding is correct, the base station receives the affirmation ACK message that user terminal feeds back; If decoding error, the base station receives the NACK message unconfirmed of user terminal feedback;
Modulation system is confirmed according to said CQI value with by the CQI value side-play amount that decoded result is confirmed in the base station, and correspondingly adjust send to user terminal the data block size or/and transmitting power; Saidly confirm that by decoded result the process of CQI value side-play amount comprises: confirm ACK message CQI value side-play amount to be reduced the pre-determined amount Δ when the base station receives
CQIWhen the base station receives NACK message unconfirmed, CQI value side-play amount is increased pre-determined amount δ
CQI, Δ wherein
CQI=K* δ
CQI, K=(1-BLER
Tar)/BLER
Tar, BLER
TarFor receiving the desired value of data block.
2. the method for claim 1 is characterized in that, is CQI value side-play amount setting range in advance, and said CQI value side-play amount is adjusted in this scope.
3. method as claimed in claim 2 is characterized in that, the initial value of K is ((1-BLER
Tar)/BLER
Tar), as block error rate BLER＞BLER
Tar, the K value raises a step-length L
BAs BLER＜BLER
Tar, step-length L of K value downward modulation
B
4. the method for claim 1 is characterized in that,
Confirm ACK message when the base station receives, then transmission block is reduced the pre-determined amount Δ
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased pre-determined amount δ
TBS
5. method as claimed in claim 4 is characterized in that said transmission block reduces the pre-determined amount Δ
TBSFor said transmission block increases scheduled volume δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
6. the method for claim 1 is characterized in that, confirms ACK message when the base station receives, and then power offset is reduced the pre-determined amount Δ
PWhen the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
7. method as claimed in claim 6 is characterized in that, said power offset reduces the pre-determined amount Δ
PFor said power offset increases pre-determined amount δ
PK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
8. the method for claim 1 is characterized in that, when the encoding rate that sends data reached available maximum encoding rate, the transmitting power of base station was sent with power offset definite by maximum available power, and transmitting power is less than maximum available power.
9. the method for claim 1 is characterized in that, the encoding rate of the data of sending does not reach available maximum encoding rate, and data are sent according to maximum available power in the base station.
10. the method for claim 1 is characterized in that, said modulation system comprises QPSK modulation and 16QAM modulation, sets the predetermined value of SNR, when said SNR value is lower than this predetermined value, adopts QPSK, when said SNR value is higher than this predetermined value, adopts 16QAM.
11. the method for claim 1 is characterized in that, adjusts said data block size (TBS) according to encoding rate R and available physical resource, wherein encoding rate R is relevant with channel quality indicated value.
12. the supervisory control system of a wireless communication signal channel quality is characterized in that, comprising:
The measuring and calculating unit is arranged on user terminal, is used to calculate the signal to noise ratio (snr) that receives signal, and obtains the CQI value of transfer channel according to the mapping relations of this signal to noise ratio and channel quality indication (CQI) value;
Transmitting element is used for resulting CQI value is sent to the base station;
Data processing unit is arranged on user terminal, is used for the data that receive are decoded, and decoded result is fed back to the base station, if decoding is correct, the base station receives the affirmation ACK message of user terminal feedback; If decoding error, the base station receives the NACK message unconfirmed of user terminal feedback;
Be provided with and adjustment unit, be arranged on the base station,, confirm modulation system according to said CQI value and the CQI value side-play amount confirmed by decoded result, and correspondingly adjust send to UE the data block size or/and transmitting power; Saidly confirm that by decoded result the process of CQI value side-play amount comprises: confirm ACK message CQI value side-play amount to be reduced the pre-determined amount Δ when the base station receives
CQIWhen the base station receives NACK message unconfirmed, CQI value side-play amount is increased pre-determined amount δ
CQ
Δ wherein
CQI=K* δ
CQI, K=(1-BLER
Tar)/BLER
Tar, BLER
TarFor receiving the desired value of data block.
13. system as claimed in claim 12 is characterized in that,
Confirm ACK message when the base station receives, then power offset is reduced the pre-determined amount Δ
PWhen the base station receives NACK message unconfirmed, then power offset is increased pre-determined amount δ
P
14. system as claimed in claim 13 is characterized in that,
Confirm ACK message when the base station receives, then transmission block is reduced the pre-determined amount Δ
TBS
When the base station receives NACK message unconfirmed, then transmission block is increased pre-determined amount δ
TBS
15. system as claimed in claim 14 is characterized in that,
Said transmission block reduces the pre-determined amount Δ
TBSFor said transmission block increases pre-determined amount δ
TBSK doubly, the value of K is ((1-BLER
Tar)/BLER
Tar).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006101125809A CN101132227B (en) | 2006-08-23 | 2006-08-23 | Monitoring method and system for wireless communication signal channel quality |
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|---|---|---|---|
| CN2006101125809A CN101132227B (en) | 2006-08-23 | 2006-08-23 | Monitoring method and system for wireless communication signal channel quality |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533105A (en) * | 2003-03-26 | 2004-09-29 | �ձ�������ʽ���� | Radio communication syste, base station and method for correcting radio link quality information |
| WO2005078976A1 (en) * | 2004-02-07 | 2005-08-25 | Neocific, Inc. | Methods and apparatus for multi-carrier communication systems with automatic repeat request (arq) |
| CN1960232A (en) * | 2005-11-04 | 2007-05-09 | 大唐移动通信设备有限公司 | Method for raising accuracy of indicating channel quality, and application |
-
2006
- 2006-08-23 CN CN2006101125809A patent/CN101132227B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1533105A (en) * | 2003-03-26 | 2004-09-29 | �ձ�������ʽ���� | Radio communication syste, base station and method for correcting radio link quality information |
| WO2005078976A1 (en) * | 2004-02-07 | 2005-08-25 | Neocific, Inc. | Methods and apparatus for multi-carrier communication systems with automatic repeat request (arq) |
| CN1960232A (en) * | 2005-11-04 | 2007-05-09 | 大唐移动通信设备有限公司 | Method for raising accuracy of indicating channel quality, and application |
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