CN101997638B - Method and device for determining parameters used for detecting hybrid automatic repeat request-acknowledgement (HARQ-ACK) signals - Google Patents

Abstract

The invention relates to the technical field of communication, and discloses a method for determining the parameters used for detecting hybrid automatic repeat request-acknowledgement (HARQ-ACK) signals. The method comprises the following steps: acquiring performance requirements of PRLC and Pe-PHY; and determining the parameters used for detecting the HARQ-ACK signals according to the performance requirements of the PRLC and the Pe-PHY. The embodiment of the invention also provides a device for determining the parameters used for detecting HARQ-ACK signals. By adopting the method and device for determining the parameters used for detecting the HARQ-ACK signals, the performance requirement of detecting the HARQ-ACK signals under a multiple input multiple output (MIMO) or downlink multiple carrier scene can be satisfied.

Description

Be identified for detecting the method and apparatus of the parameter of HARQ-ACK signal

Technical field

The present invention relates to moving communicating field, particularly be identified for detecting the method and apparatus of the parameter of mixed automatic retransfer request-affirmation HARQ-ACK signal.

Background technology

WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) HSDPA of system (High Speed Downlink Packet Data Access, down high speed grouping access) technology, its physical layer work basic principle is:

Node B (also can be called Node B or base station) is by data channel HS-DSCH (Highspeed-Downlink shared channel, high speed descending sharing channel) to UE (User Equipment, subscriber equipment) sends data, send the control information relevant with HS-DSCH by control channel HS-SCCH (Shared Control Channel forHS-DSCH, High-Speed Shared Control Channel) simultaneously.

UE monitors HS-SCCH, if do not detect this channel, then UE can not send feedback information to Node B, perhaps is called DTX (Discontinuous Transmission, the discontinuous transmission) information that sends; If detect this channel, then according to the data on the reception HS-DSCH of the control information on the HS-SCCH (s).If the data that UE receives are correct, then send ACK (ACKnowledgement confirms) information to Node B; If the error in data that receives then sends NACK (Negative ACKnowledgement, non-affirmation) information to Node B.

Above-mentioned DTX, ACK, nack message are referred to as HARQ-ACK (Hybrid Automatic RepeatRequest-ACKnowledgement, mixed automatic retransfer request-affirmation) information (or signal).Above-mentioned HARQ-ACK signal sends to Node B through coding and after modulating by HS-DPCCH (Uplink High-SpeedDedicated Physical Control Channel, up link High-Speed Dedicated Physical Control Channel).The HARQ-ACK signal that Node B the receives UE feedback row decoding of going forward side by side if decode results is ACK, then can select to send other data; If NACK or DTX then retransmit former data.

At 3GPP (3rd Generation Partnership Project, hereinafter to be referred as: third generation partner plan) in the Its Relevant Technology Standards, the encoding scheme of HARQ-ACK signal when single carrier being provided and not having disposed MIMO (Multiple Input MultipleOutput, multiple-input and multiple-output).In this case, need altogether 3 signal: ACK of feedback, NACK, DTX; Wherein ACK and NACK need to be mapped as code word, and mapping relations are as shown in table 1:

Table 1

ACK	1	1	1	1	1	1	1	1	1	1
											NACK	0	0	0	0	0	0	0	0	0	0

Modulated process is: incite somebody to action ' 1 ' and be mapped as ' 1 ', be mapped as ' 1 ' with ' 0 '.Therefore transmission data corresponding to ACK be 1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1 ,-1}, and transmission data corresponding to NACK are { 1,1,1,1,1,1,1,1,1,1}.

Receive the HARQ-ACK signal of UE transmission as Node B after, use the maximum-likelihood decoding method to decipher.Its basic principle is as follows:

After through airborne spread and the processing of receiver code chip level, the HARQ-ACK signal that obtains before decoding is processed is actually a sequence of real numbers, is designated as Y=(y ₁, y ₂..., y ₁₀); The codeword sequence that Y is corresponding with all signals (that is: the data sequence after modulation) is asked correlation, maximum related value is recorded with corresponding signal or call number, again this maximum related value and noise gate are compared, if this maximum related value, is then exported signal corresponding to maximum related value or call number greater than noise gate; Otherwise, judge that the HARQ-ACK signal is DTX.

Wherein, this noise gate is the product T σ of amplitude σ and thresholding factor T of making an uproar at the end.Thresholding factor T is the parameter that can set in advance, and this parameter will affect decoding performance.

In the prior art, the 3GPP Its Relevant Technology Standards has stipulated that the demodulation performance of HARQ-ACK requires (or be called the ACK/NACK that detects HS-DPCCH performance requirement), such as, ACK false alarm probability and ACK false dismissal probability have been defined, wherein, (DTX-＞ACK) expression sends DTX to ACK false alarm probability P, is the probability of ACK by error detection; When ACK false dismissal probability P (ACK-＞NACK or DTX) expression sends ACK, by the probability of error detection.And stipulated that the ACK false alarm probability is not higher than 10 ^-2The ACK false dismissal probability is not more than 10 ^-2

By above performance requirement, under given channel condition, can determine the thresholding factor T and SNR (Signal to Noise Ratio, received signal to noise ratio) or the received power that satisfy the demands.Wherein, accept signal to noise ratio and can be chip-level received signal to noise ratio Ec/N ₀, or bit-level received signal to noise ratio Eb/N ₀, or symbol level received signal to noise ratio Es/N ₀Deng).Wherein because the end N that makes an uproar ₀Be a constant, there are proportionate relationship in SNR and received power, therefore, usually use term ' power ' to replace ' signal to noise ratio ', and ' power ' below mentioned is equal to ' signal to noise ratio '.Such as, at first can under given performance requirement, determine T according to the functional relation of ACK false alarm probability and T; Then under the prerequisite of given T, can obtain the functional relation of received signal to noise ratio SNR and ACK false dismissal probability, thereby determine required SNR according to the undetected performance requirement of ACK.In practical communication system, the power setting of HARQ-ACK signal can arrange by power bias.Described power bias refers to, the ratio of the power of a channel and reference channel power.Such as in the physical layer up link, use the power of DPCCH channel as a reference, then the power bias of HARQ-ACK is defined as the ratio (or being called theoretical value) of HARQ-ACK power and DPCCH power.In practical communication system, power bias can only value be some centrifugal pumps, and therefore, its actual value is generally the value that approaches with above theoretical value.

Along with the development of technology, descending MIMO technology, the descending pair of carrier wave, DC-MIMO (that is: descending pair of carrier wave and dispose MIMO) etc. in the WCDMA system, have been introduced.Also may introduce 3 carrier waves or 4 ZAP future in the WCDMA system.Therefore, the introducing of new technology so that original performance requirement be difficult to be suitable for.

Such as, in descending pair of ZAP, 2 carrier waves of descending use, 1 HS-DPCCH of up use; So need to and be carried on the upper transmission of a HS-DPCCH to the feedback information combined coding of receive data on 2 carrier waves.At this moment, up possible being combined as of feedback signal { ACK/ACK, ACK/NACK, NACK/ACK, NACK/NACK, ACK/DTX, NACK/DTX, DTX/ACK, DTX/NACK, the DTX} that needs transmission.Wherein, other allied signal that removes DTX all is mapped as a HARQ-ACK code word (the 0-1 sequences of 10 bits), and DTX also can be written as DTX/DTX, and expression is all fed back the DTX signal to two carrier waves, do not send code word this moment, can think that send the idle bit word or be called the DTX code word this moment yet.Therefore, when adopting descending pair of ZAP, a HARQ-ACK signal (or code word) includes the feedback information of 2 carrier waves.

The ACK false-alarm performance of using in the prior art (such as, the ACK false alarm probability) under downlink double/multi-load wave field scape, the DTX signal distributions just includes the feedback signal DTX of the second carrier wave such as code word corresponding to the ACK/DTX in descending pair of ZAP in numerous code words.At this moment, obtain the P of certain carrier wave or two carrier waves (DTX-＞ACK) performance is not too appropriate by sending idle bit word (or DTX code word).For example, when sending the DTX/NACK code word, in fact first carrier wave has sent the DTX signal, but is not added up interior.On the other hand, can not simply use the undetected performance of ACK of the prior art (such as, ACK false dismissal probability); Because the ack signal of each carrier wave also is distributed in many HARQ-ACK code words under the downlink double/multi-load wave field scape.

Therefore, the performance requirement of using in the prior art (such as, ACK false alarm probability and ACK false dismissal probability) be difficult to be applicable under the technology scenes such as downlink double/multi-load ripple.In addition, when adopting the MIMO technology, a HARQ-ACK signal (or code word) may comprise the feedback information of a plurality of data blocks simultaneously.Therefore, the performance requirement of using in the prior art also is difficult to be applicable under the MIMO technology scene.

Summary of the invention

In view of this, the embodiment of the invention provides a kind of method that is identified for detecting the parameter of HARQ-ACK signal, comprising: obtain average wireless chain control layer retransmission probability P _RLCWith average extra reason layer retransmission probability P _E-PHYPerformance requirement; According to described P _RLCWith described P _E-PHYPerformance requirement be identified for detecting the parameter of described HARQ-ACK signal.

The embodiment of the invention also provides a kind of device that is identified for detecting the parameter of mixed automatic retransfer request-affirmation HARQ-ACK signal, comprising: acquiring unit is used for obtaining P _RLCAnd P _E-PHYPerformance requirement; Determining unit is used for according to described P _RLCWith described P _E-PHYDetermination of property parameter for detection of the parameter of described HARQ-ACK signal.

That adopts that embodiments of the invention provide determines method and apparatus for detection of the parameter of HARQ-ACK signal, according to P _RLCAnd P _E-PHYTwo performance index are determined the suitable parameter for detection of the HARQ-ACK signal, can satisfy under the scene of MIMO or downlink double/multi-load ripple detecting the performance requirement of HARQ-ACK signal.

Description of drawings

Fig. 1 determines method flow schematic diagram for detection of the parameter of HARQ-ACK signal for what one embodiment of the invention provided;

The parameter schematic diagram that be identified for detect HARQ-ACK signal of Fig. 2 for providing in the embodiment of the invention;

Fig. 3 determines apparatus structure schematic diagram for detection of the parameter of HARQ-ACK signal for what another embodiment of the present invention provided.

Embodiment

The embodiment of the invention relates to the technology that detects the HARQ-ACK signal, in the embodiment of the invention, adopts average RLC (Radio Link Control, wireless chain control layer) retransmission probability P _RLCWith average extra reason layer retransmission probability P _E-PHYAs the performance index that detect the HARQ-ACK signal, can satisfy under the scene of MIMO or downlink double/multi-load ripple the detection to the HARQ-ACK signal of HS-DPCCH.

In the embodiment of the invention, P _RLCBe defined as: non-re-transmitting data block of the average every transmission of Node B, UE receives this data block and feeds back the HARQ-ACK signal, and Node B causes and need to carry out the probability that RLC retransmits to this data block this HARQ-ACK signal interpretation mistake.Wherein, RLC retransmits mainly because DTX or NACK signal are that ACK causes by error detection.

In the embodiment of the invention, P _E-PHYBe defined as: non-re-transmitting data block of the average every transmission of Node B, UE receives this data block and feeds back the HARQ-ACK signal, Node B causes and need to carry out the probability that e-PHY (extra PHY, extra physical layer) retransmits to this data block this HARQ-ACK input mistake.Wherein, e-PHY retransmits because ack signal is that NACK and DTX signal cause by error detection.

The below retransmits the e-PHY re-transmission to RLC for example and describes.Under MIMO or downlink double/multi-load wave field scape, a HARQ-ACK signal may include the information of a plurality of data blocks simultaneously.Such as in DC-MIMO double fluid-double fluid (descending pair of carrier wave and disposed MIMO, and use double-stream mode at every carrier wave) scene, UE feeds back AA/D, Node B with its error detection be AN/AN (wherein, A represents ACK, and N represents NACK, and D represents DTX); Then the feedback signal for the first data flow of carrier wave 1 is ACK, and Node B decode results also is ACK, and decoding is correct, need not to retransmit.If, be ACK for the feedback signal of the second data flow of carrier wave 1, decode results is NACK, will cause 1 e-PHY to retransmit; Feedback signal for the 1st data flow of carrier wave 2 is DTX, and decode results is ACK, will cause a RLC to retransmit; Feedback signal for the 2nd data flow of carrier wave 2 is DTX, and Node B decode results is NACK, can not cause extra re-transmission.Therefore, send 4 data blocks downwards at this Node B, UE feeds back AA/D, when Node B error detection is AN/NA, will cause respectively 1 RLC to retransmit and 1 e-PHY re-transmission.

The method flow schematic diagram of the parameter of the definite detection HARQ-ACK signal that Fig. 1 provides for one embodiment of the invention.As shown in Figure 1, the method can comprise:

Step 101 is obtained P _RLCAnd P _E-PHYPerformance requirement; Step 102 is according to this P _RLCWith this P _E-PHYPerformance requirement determine to detect the parameter of HARQ-ACK signal.

In the present embodiment, according to P _RLCAnd P _E-PHYPerformance requirement determine the parameter of HARQ-ACK signal, can satisfy under the scene of MIMO or downlink double/multi-load ripple detecting the performance requirement of HARQ-ACK signal.

Below illustrate and obtain P _RLCAnd P _E-PHYMethod, such as, can calculate P according to following formula _RLCAnd P _E-PHY:

$P_{e-\mathrm{PHY}}=\frac{\underset{U\∈\mathrm{\Ω}}{\mathrm{\Σ}}\underset{V\∈\mathrm{\Ω}}{\mathrm{\Σ}}P\left(U\right)\·W_{e-\mathrm{PHY}}(U,V)\·P(U,V)}{\mathrm{StramNum}}$

$P_{\mathrm{RLC}}=\frac{\underset{U\∈\mathrm{\Ω}}{\mathrm{\Σ}}\underset{V\∈\mathrm{\Ω}}{\mathrm{\Σ}}P\left(U\right)\·W_{\mathrm{RLC}}(U,V)\·P(U,V)}{\mathrm{StramNum}}$

In the above formula, StreamNum represents the downlink data flow number, i.e. each TTI (Transmission Time Interval, Transmission Time Interval), NodeB send the number of data block to UE; U and V represent respectively the HARQ-ACK signal (or code word) in signal (or code word) set omega, P (U) expression is to the probability of this StreamNum data block feedback signal U, P (U, V) expression transmitted signal U is the probability of V by error detection; W _E-PHYWhen (U, V) is illustrated in UE and sends U and detected as V by Node B, the number that causes e-PHY to retransmit; W _RLCWhen (U, V) is illustrated in UE and sends U and detected as V by NodeB, the number that causes RLC to retransmit.Wherein, P (U) can require to obtain by the downlink data demodulation performance, and P (U, V) can obtain by emulation.

P _RLCAnd P _E-PHYValue also can obtain by the following method:

Under given condition, (comprise transmission channel, the data of Node B send scene, the decoding threshold factor, UE signal transmission power etc.), at each TTI, UE supposes to know detection (or decoding) result of the each HARQ-ACK signal that sends of UE and Node B by the signal in certain probability distribution transmitted signal set omega.By relatively transmitted signal and decoded signal can obtain working as RLC re-transmission and the wrong number of e-PHY re-transmission that occurs in time send and receive process.Through the statistics of K TTI, the wrong number of RLC re-transmission occurring is N _RLC, the number that the e-PHY mistake occurs is N _E-PHY, then can pass through $P_{\mathrm{RLC}}=\frac{N_{\mathrm{RLC}}}{K\×\mathrm{StreamNum}}$ With $P_{e-\mathrm{PHY}}=\frac{N_{e-\mathrm{PHY}}}{K\×\mathrm{StreamNum}}$ Obtain P _RLCAnd P _E-PHYWherein, K is the positive integer more than or equal to 1.

In the embodiment of the invention, can be for satisfying described P for detection of the parameter of described HARQ-ACK signal _RLCWith described P _E-PHYPower bias or received signal to noise ratio or thresholding factor T or the false alarm probability of performance requirement; Wherein, described power bias is the received signal to noise ratio SNR of described HARQ-ACK and the ratio of reference channel received power.

Below illustrate according to this P _RLCWith this P _E-PHYPerformance requirement determine the method for the relevant parameter of HARQ-ACK signal:

Under certain channel circumstance, P _RLC, P _E-PHYValue relevant with the received power of thresholding factor T and HARQ-ACK signal.Therefore, can be according to P _RLC, P _E-PHYPerformance requirement and thresholding factor T determine that the HARQ-ACK signal satisfies the received power of performance requirement, and then definite power bias.

Particularly, under given condition, for each thresholding factor T, can obtain respectively _PRLCWith received signal to noise ratio SNR and P _E-PHYFunctional relation with received signal to noise ratio SNR.Fig. 2 shows under a predetermined threshold factor T, a definite SNR _w(T) schematic diagram.Wherein, suppose to require in the communication system P _RLCBe not more than a, require P _E-PHYBe not more than b; Then corresponding a and b can find respectively corresponding received signal to noise ratio SNR _a(T) and SNR _b(T).Can define SNR _w(T) received power when satisfying above-mentioned 2 performance requirements simultaneously, that is: SNR _w(T)=max{SNR _a(T), SNR _b(T) }.According to this received signal to noise ratio SNR _w(T) and the relation of the received power of reference channel when satisfying certain performance requirement, can determine the power bias of HARQ-ACK relative reference channel, such as, can be when satisfying certain performance requirement SNR _w(T) with the ratio of the received power of reference channel.

As a kind of scheme that has more universal significance, under given condition, can also under different thresholding factor T, obtain respectively the SNR corresponding to different thresholding factor T _w(T); Thereby can obtain T and SNR _w(T) functional relation; Wherein, thresholding factor T is only in a certain interval value, in this interval, and SNR _w(T) relation curve with T is the curve of a continuous bounded, and there is a minimum value in this curve in this interval.Therefore can get minimum SNR _w(T) T corresponding to value is designated as T ^*, corresponding minimum SNR _w(T) be SNR _w(T ^*); { T then ^*, SNR _w(T ^*) be the optimum thresholding factor and the optimum received power of this communication system under specified criteria.According to this received signal to noise ratio SNR _w(T ^*) and the relation of the received power of reference channel when satisfying certain performance requirement, can determine the optimal power biasing, such as, can be SNR _w(T ^*) with the ratio of DPCCH received power.

In addition, since thresholding factor T in certain span and false alarm probability (can be the false alarm probability of non-DTX code word, namely send DTX but by the probability of error detection for other signals, or the false alarm probability of certain non-DTX code word, such as the ACK false alarm probability) corresponding one by one, therefore also can replace the thresholding factor with certain false alarm probability.Such as, thresholding factor T is set is certain value, can be equivalent to arrange certain false alarm probability is certain value.

One of ordinary skill in the art will appreciate that, realize all or part of step in the embodiment of the method for the above-mentioned parameter that is identified for detecting the HARQ-ACK signal, to come the relevant hardware of instruction to finish by computer program code, described program code can be stored in a computer read/write memory medium or the computer program, when this program is carried out by a computer unit, can carry out the step that comprises such as above-mentioned embodiment of the method.Wherein, described storage medium or calculating and program product can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or store-memory body (Random Access Memory, RAM) etc. at random.

Fig. 3 determines device for detection of the parameter of HARQ-ACK signal for what another embodiment of the present invention provided.As shown in Figure 3, this device 30 comprises: acquiring unit 301 and determining unit 302.

This acquiring unit 301 is used for obtaining P _RLCAnd P _E-PHYPerformance requirement; This determining unit 302 is used for according to this P _RLCWith this P _E-PHYPerformance requirement be identified for detecting the parameter of HARQ-ACK signal.

In the present embodiment, according to P _RLCAnd P _E-PHYPerformance requirement be identified for detecting the parameter of HARQ-ACK signal, can satisfy under the scene of MIMO or downlink double/multi-load ripple detecting the performance requirement of HARQ-ACK signal.

Further, this acquiring unit 301 can pass through $P_{\mathrm{RLC}}=\frac{\underset{U\∈\mathrm{\Ω}}{\mathrm{\Σ}}\underset{V\∈\mathrm{\Ω}}{\mathrm{\Σ}}P\left(U\right)\·W_{\mathrm{RLC}}(U,V)\·P(U,V)}{\mathrm{StramNum}}$ With $P_{e-\mathrm{PHY}}=\frac{\underset{U\∈\mathrm{\Ω}}{\mathrm{\Σ}}\underset{V\∈\mathrm{\Ω}}{\mathrm{\Σ}}P\left(U\right)\·W_{e-\mathrm{PHY}}(U,V)\·P(U,V)}{\mathrm{StreamNum}}$ Obtain P _RLCAnd P _E-PHY

Perhaps, this acquiring unit 301 can pass through $P_{\mathrm{RLC}}=\frac{N_{\mathrm{RLC}}}{K\×\mathrm{StreamNum}}$ With $P_{e-\mathrm{PHY}}=\frac{N_{e-\mathrm{PHY}}}{K\×\mathrm{StreamNum}}$ Obtain P _RLCAnd P _E-PHY

Wherein, the U in the above-mentioned formula, V, P (U), W _E-PHY(U, V), W _RLC(U, V), P (U, V), StreamNum, K, N _RLCAnd N _E-PHYIsoparametric implication can be referring to the description of embodiment of the method.

Further, this acquiring unit 301 can also be used for according to described P _RLCWith described P _E-PHYPerformance requirement and predetermined thresholding factor T power bias of being identified for detecting described HARQ-ACK signal.Detailed process can be referring to the description in the embodiment of the method.

Further, this acquiring unit 301 can also be used for according to described P _RLCWith received signal to noise ratio SNR and described P _E-PHYDetermine the functional relation of thresholding factor T and received signal to noise ratio SNR with the functional relation of described SNR; And determine hour corresponding thresholding factor T of described SNR according to described thresholding factor T and the functional relation of described received signal to noise ratio SNR.Detailed process can be referring to the description in the embodiment of the method.

This determining unit 302 can be according to P _RLC, P _E-PHYPerformance requirement and thresholding factor T determine the optimum thresholding factor and optimum received power under the specified criteria, and then definite optimal power biasing.Detailed process can be referring to the description in the embodiment of the method.

Being preferred embodiment of the present invention only below, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. a method that is identified for detecting the parameter of mixed automatic retransfer request-affirmation HARQ-ACK signal is characterized in that, comprising:

Obtain average wireless chain control layer retransmission probability P _RLCWith average extra reason layer retransmission probability P _E-PHYPerformance requirement;

According to described P _RLCWith described P _E-PHYPerformance requirement be identified for detecting the parameter of described HARQ-ACK signal; Wherein,

Described P _RLCBe non-re-transmitting data block of the average every transmission of Node B, user equipment (UE) receives described data block and feeds back described HARQ-ACK signal, and described Node B causes and need to carry out the probability that RLC retransmits to this data block described HARQ-ACK signal interpretation mistake;

Described P _E-PHYBe non-re-transmitting data block of the average every transmission of described Node B, described UE receives described data block and feeds back described HARQ-ACK signal, and described Node B causes carrying out this data block the probability of extra physical layer retransmission to described HARQ-ACK input mistake;

For detection of the parameter of described HARQ-ACK signal for satisfying described P _RLCWith described P _E-PHYPower bias or received signal to noise ratio SNR or thresholding factor T or the false alarm probability of performance requirement; Wherein, described power bias is the received signal to noise ratio SNR of described HARQ-ACK and the ratio of reference channel received power.

2. method according to claim 1 is characterized in that, also comprises:

According to formula

Obtain described P _RLCAnd,

According to formula

Obtain described P _E-PHYWherein,

Described StreamNum is among each Transmission Time Interval TTI, and Node B is to the number of the data block of user equipment (UE) transmission; Described U and described V represent respectively a HARQ-ACK signal among the described signal set Ω, and described P (U) expression is to the probability of described StreamNum data block feedback signal U, and P (U, V) expression transmitted signal U is the probability of V by error detection; Described W _E-PHY(U, V) is illustrated in described UE and sends U, when being detected as V by described Node B, and the number that causes extra physical layer e-PHY to retransmit; Described W _RLC(U, V) is illustrated in described UE and sends U, when being detected as V by described NodeB, and the number that causes wireless chain control layer RLC to retransmit.

3. method according to claim 1 is characterized in that, also comprises:

According to

Obtain described P _RLCAnd

According to

Obtain P _E-PHY

Wherein, StreamNum is among each Transmission Time Interval TTI, and Node B sends the number of data block to user equipment (UE); N _RLCRepresent that K TTI wireless chain control layer occurs and retransmit wrong number; N _E-PHYRepresent that the number of extra physical layer retransmission mistake appears in K TTI; K is the positive integer more than or equal to 1.

4. method according to claim 1 is characterized in that, according to described P _RLCWith described P _E-PHYThe performance requirement parameter that is identified for detecting described HARQ-ACK signal comprise:

According to described P _RLCWith described P _E-PHYPerformance requirement and predetermined thresholding factor T power bias of being identified for detecting described HARQ-ACK signal.

5. method according to claim 4 is characterized in that, according to described P _RLCWith described P _E-PHYPerformance requirement and predetermined thresholding factor T power information of being identified for detecting described HARQ-ACK signal comprise:

Determine described P according to described predetermined thresholding factor T _RLCWith received signal to noise ratio SNR and described P _E-PHYFunctional relation with described SNR;

According to described P _RLCWith described SNR and described P _E-PHYDetermine to satisfy described P with the functional relation of described SNR _RLCWith described P _E-PHYThe SNR of performance requirement;

According to satisfying described P _RLCWith described P _E-PHYThe SNR of performance requirement determine the power bias of described HARQ-ACK signal.

6. method according to claim 1 is characterized in that, according to described P _RLCWith described P _E-PHYThe performance requirement parameter that is identified for detecting described HARQ-ACK signal comprise:

According to described P _RLCWith received signal to noise ratio SNR and described P _E-PHYDetermine the functional relation of thresholding factor T and received signal to noise ratio SNR with the functional relation of described SNR;

Determine hour corresponding thresholding factor T of described SNR according to described thresholding factor T and the functional relation of described received signal to noise ratio SNR.

7. a device that is identified for detecting the parameter of mixed automatic retransfer request-affirmation HARQ-ACK signal is characterized in that, comprising:

Acquiring unit is used for obtaining average wireless chain control layer retransmission probability P _RLCWith average extra reason layer retransmission probability P _E-PHYPerformance requirement;

Determining unit is used for according to described P _RLCWith described P _E-PHYDetermination of property parameter for detection of the parameter of described HARQ-ACK signal; Wherein,

Described P _RLCBe non-re-transmitting data block of the average every transmission of Node B, user equipment (UE) receives described data block and feeds back described HARQ-ACK signal, and described Node B causes and need to carry out the probability that RLC retransmits to this data block described HARQ-ACK signal interpretation mistake;

Described P _E-PHYBe non-re-transmitting data block of the average every transmission of described Node B, described UE receives described data block and feeds back described HARQ-ACK signal, and described Node B causes carrying out this data block the probability of extra physical layer retransmission to described HARQ-ACK input mistake;

For detection of the parameter of described HARQ-ACK signal for satisfying described P _RLCWith described P _E-PHYPower bias or received signal to noise ratio SNR or thresholding factor T or the ACK false alarm probability of performance requirement; Wherein, described power bias is the received signal to noise ratio SNR of described HARQ-ACK and the ratio of reference channel received power.

8. device according to claim 7 is characterized in that, described acquiring unit also is used for,

According to formula Obtain described P _RLCAnd,

According to formula

Obtain described P _E-PHYWherein,

Described StreamNum is among each Transmission Time Interval TTI, and Node B is to the number of the data block of user equipment (UE) transmission; Described U and described V represent respectively a HARQ-ACK signal among the described signal set Ω, and described P (U) expression is to the probability of described StreamNum data block feedback signal U, and P (U, V) expression transmitted signal U is the probability of V by error detection; Described W _E-PHY(U, V) is illustrated in described UE and sends U, when being detected as V by described Node B, and the number that causes extra physical layer e-PHY to retransmit; Described W _RLC(U, V) is illustrated in described UE and sends U, when being detected as V by described NodeB, and the number that causes wireless chain control layer RLC to retransmit.

9. device according to claim 7 is characterized in that, described acquiring unit also is used for,

According to formula Obtain described P _RLCAnd

According to formula

Obtain P _E-PHY

Wherein, StreamNum is among each Transmission Time Interval TTI, and Node B sends the number of data block to user equipment (UE); N _RLCRepresent that K TTI wireless chain control layer occurs and retransmit wrong number; N _E-PHYRepresent that the number of extra physical layer retransmission mistake appears in K TTI; K is the positive integer more than or equal to 1.

10. device according to claim 7 is characterized in that,

Described determining unit also is used for according to described P _RLCWith described P _E-PHYPerformance requirement and predetermined thresholding factor T power bias of being identified for detecting described HARQ-ACK signal.

11. device according to claim 7 is characterized in that, described determining unit is further used for,

Determine described P according to described predetermined thresholding factor T _RLCWith received signal to noise ratio SNR and described P _E-PHYFunctional relation with described SNR;

According to described P _RLCWith described SNR and described P _E-PHYDetermine to satisfy described P with the functional relation of described SNR _RLCWith described P _E-PHYThe SNR of performance requirement;

According to satisfying described P _RLCWith described P _E-PHYThe SNR of performance requirement determine the power bias of described HARQ-ACK signal.

12. device according to claim 7 is characterized in that, described determining unit is further used for,

According to described P _RLCWith received signal to noise ratio SNR and described P _E-PHYDetermine the functional relation of thresholding factor T and received signal to noise ratio SNR with the functional relation of described SNR;

Determine hour corresponding thresholding factor T of described SNR according to described thresholding factor T and the functional relation of described received signal to noise ratio SNR.

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