CN103873212A - Uplink ACK/NACK bundling transmission method, terminal and base station - Google Patents

Abstract

This application discloses a kind of uplink ACK/NACK binding transmission methods, comprising: terminal is indicated according to Downlink Control Information (DCI) format 1/1A/1B/1D/2/2A/2B The continuity of value and the configuration information of semi-persistent scheduling determine the downlink subframe continuously correctly demodulated in feedback window, and feeding back ACK/nack message on corresponding ascending resource; B, the ACK/NACK information of base station detection terminal feedback judges the downlink subframe that terminal continuously correctly demodulates, and carries out new biography to other downlink datas distribution in feedback window in addition to the downlink subframe continuously correctly demodulated. Disclosed herein as well is a kind of terminals and a kind of base station. Using technical solution disclosed in the present application, the efficiency of data transmission can be improved, and improve and judge that subframe is lost, mistake demodulates subframe and the accuracy rate of correct demodulation subframe.

Description

Method, terminal and the base station of a kind of uplink ACK/NACK binding transmission

Technical field

The application relates to wireless communication technology field, method, terminal and the base station of particularly a kind of uplink ACK/NACK binding transmission.

Background technology

Due to the asymmetry of the ascending-descending subframes of TD-LTE, TD-LTE terminal can be fed back the ACK/NACK information that multiple descending sub frames are corresponding in a sub-frame of uplink, for the problem of this many ACK/NACK feedbacks, TD-LTE system definition two kinds of feedback models, binding (ACK/NACK Bundling mode) feedback model and multiplexing (ACK/NACK Multiplexing mode) feedback model.Base station is by RRC message by the ACK/NACK feedback model notification terminal specifically using, and concrete RRC signaling is as follows:

rrcConnectionSetup->PUCCH-ConfigDedicated->tdd-AckNackFeedbackMode

As shown in table 1 for the sub-frame of uplink n of transferring ACK/NACK and the corresponding relation of multiple descending sub frames:

Table 1: descending associated sequence number set K:{k ₀, k ₁... k _m-1}

That is: terminal in sub-frame of uplink n for descending sub frame n-k _min downlink data distribute and carry out ACK/NACK feedback, comprising: to have Physical Downlink Control Channel (PDCCH) indication Physical Downlink Shared Channel (PDSCH) transmission, do not there is the PDSCH transmission of PDCCH indication or be used to indicate the PDCCH that descending semi-persistent scheduling (SPS) discharges and carry out ACK/NACK feedback.In table 1, the size that M is feedback window, expression need to be carried out the quantity of whole descending sub frames of ACK/NACK feedback in a sub-frame of uplink.

Under bundled feedback pattern, terminal is carried out logical AND by whole descending sub frames in feedback window M corresponding to multiple ACK/NACK information of same code word, obtains the actual feedback information of 1 bit (when descending single codeword) or 2 bits (when descending dicode word).The method can represent multiple ACK/NACK information by an ACK/NACK feedback information bits.The ACK/NACK feedback information generating by the method is at PUCCH resource sequence number

on transmit,

computing formula as formula (1):

$n_{\mathrm{PUCCH}}^{\left(1\right)}=(M-m-1)\×N_p+m\×N_{p+1}+n_{\mathrm{CCE}}+N_{\mathrm{PUCCH}}^{\left(1\right)}---\left(1\right)$

Wherein:

be configured by high level;

N _cCEfor subframe n-k _mthe sequence number of first CCE of the PDCCH of middle transmission, wherein k _mfor the minimum value in set K;

terminal is from { picking out a p value, make N in 0,1,2,3} _p≤ n _cCE<N _p+1.

In the time having Physical Uplink Shared Channel (PUSCH) transmission on this sub-frame of uplink now, need the ACK/NACK information of feedback on PUSCH, to transmit.

There are the following problems for bundled feedback pattern: in the time that the downlink data distribution of carrying on certain descending sub frame in feedback window exists packet loss phenomenon, terminal is still carried out logical AND by ACK/NACK the information corresponding whole downlink datas that receive, thereby will ignore packet loss phenomenon, this is by the false judgment that causes TD-LTE base station to feedback information.Therefore,, in TD-LTE system, base station is by descending distribution indication (DAI) parameter in Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

with the DAI parameter in DCI form 0

whether assist has downlink data to lose in terminal judges feedback window:

the sequence number of the PDSCH transmission of the PDCCH indication of the employing DCI form 1/1A/1B/1D/2/2A/2B distributing in feedback window for TD-LTE base station, comprises and is used to indicate the PDCCH that SPS discharges, this value increases progressively continuously in feedback window.

for all downlink resources of TD-LTE base station assigns in feedback window, comprise the sum of the PDSCH transmission and do not have with PDCCH indication.The in the situation that of not distributing any downlink resource in TD-LTE base station,

be 4.

The concrete grammar that whether has downlink data to lose in terminal judges feedback window is as follows:

Example 1: terminal does not have PUSCH resource on sub-frame of uplink n, meets formula (2) and can judge that having at least a downlink data to distribute loses:

U _dAI>0 and $V_{\mathrm{DAI}}^{\mathrm{DL}}\&NotEqual;(U_{\mathrm{DAI}}-1)\mathrm{<figure-callout\; id="4"\; label="mod"\; filenames="HDA00002572864500021.png,HDA00002572864500022.png"\; state="\{\{state\}\}">mod</figure-callout>}4+1---\left(2\right)$

Wherein: U _dAIrepresent the PDSCH transmission of the use PDCCH indication that terminal successfully detects and be used to indicate the sum that PDCCH that descending SPS discharges transmits.

Lose when whole downlink datas does not distribute, will calculate the PUCCH resource sequence number for feeding back ACK/nack message according to formula (1)

Lose when terminal detects that at least one downlink data distributes, do not feed back any ACK/NACK information, the whole downlink data in new biography feedback window is again distributed in base station.

There is a kind of special situation, in the time that the data allocations on last descending sub frame in feedback window is lost, the PDCCH on this descending sub frame does not have correct demodulation, judge do not have downlink data to distribute the conclusion of losing by drawing according to formula (2), now terminal will be carried out ACK/NACK feedback according to the situation that does not have downlink data distribution to lose, and according to the CCE sequence number of the PDCCH finally receiving in feedback window, calculate the PUCCH channel resource for feeding back ACK/nack message according to formula (1)

now, the PUCCH channel resource for feeding back ACK/nack message will be calculated according to the PDCCH of actual last descending sub frame sending in feedback window in base station

and detect ACK/NACK information on this PUCCH channel resource.Owing to terminal and base station calculating

not identical, base station cannot detect corresponding ACK/NACK information, in the time that base station can't detect corresponding ACK/NACK information, will think that terminal do not feed back any ACK/NACK information, now, the whole downlink data in new biography feedback window is again distributed in base station.

Example 2: terminal has PUSCH resource on sub-frame of uplink n, and the PDCCH that is positioned at the DCI form 0 on last descending sub frame of feedback window is not correctly separated timing by terminal, terminal has judged whether that according to formula (2) downlink data distributes loss, if show that whole downlink datas distributes the conclusion that there is no loss, will calculate the PUCCH resource sequence number for feeding back ACK/nack message according to formula (1)

if terminal detects at least one downlink data and distributes loss, do not feed back any ACK/NACK information.But base station still need to be on PUSCH demodulation ACK/NACK information.Now, PUSCH is transferred in base station not solution, will think that terminal do not feed back any ACK/NACK information, and now the whole downlink data in new biography feedback window is again distributed in base station.

Example 3: terminal has PUSCH resource on sub-frame of uplink n, and the PDCCH that is positioned at the DCI form 0 on last descending sub frame of feedback window is correctly separated timing by terminal, meet formula (3) and can judge that having at least a downlink data to distribute loses:

$V_{\mathrm{DAI}}^{\mathrm{UL}}\&NotEqual;(U_{\mathrm{DAI}}+N_{\mathrm{SPS}}-1)\mathrm{<figure-callout\; id="4"\; label="mod"\; filenames="HDA00002572864500021.png,HDA00002572864500022.png"\; state="\{\{state\}\}">mod</figure-callout>}4+1---\left(3\right)$

Wherein: N _sPSrepresent the number that in feedback window, the PDSCH for SPS transmits, value can be 0 or 1.

Distribute while losing when terminal detects at least one downlink data, terminal will produce NACK to this code word, and feed back on corresponding PUSCH, and adopt a certain orthogonal code to carry out scrambling to this PUSCH, and the definition of the sequence number i of orthogonal code is suc as formula (4):

i＝(N _bundled-1)mod4， $N_{\mathrm{bundled}}=V_{\mathrm{DAI}}^{\mathrm{UL}}+2---\left(4\right)$

Now, base station will be distributed and carry out new biography the whole downlink datas in feedback window.

In the time that the whole downlink datas distribution in feedback window are not all lost, will calculate according to formula (5) the sequence number i of orthogonal code:

i＝(N _bundled-1)mod4， $N_{\mathrm{bundled}}=V_{\mathrm{DAI}}^{\mathrm{UL}}---\left(5\right)$

Now, if that terminal feedback is NACK, base station will be distributed and retransmit the whole downlink datas in feedback window.The orthogonal code that orthogonal code sequence number i is corresponding is as shown in table 2:

The scramble sequence of table 2:TD-LTE ACK/NACK binding pattern

As seen through the above analysis, use an ACK/NACK feedback information to represent that multiple ACK/NACK information can cause unnecessary re-transmission phenomenon.In the time adopting ACK/NACK bundled feedback pattern, as long as there is a downlink data to distribute demodulation failure in feedback window, in retransmission feedback window, whole downlink datas distributes again; Lose as long as there is a downlink data to distribute, in new biography feedback window, whole downlink datas distributes again.Therefore, TD-LTE has also defined the multiplexing feedback model of ACK/NACK.Under this feedback model, all ACK/NACK feedback states in feedback window all will be embodied, thereby avoid extra re-transmission.

In the time adopting the multiplexing feedback model of ACK/NACK, if ACK/NACK information sends on PUCCH, if dicode word, first two ACK/NACK information corresponding to code word are carried out to logical AND, M descending sub frame to be feedback is corresponding in feedback window generates M ACK/NACK information, and with M PUCCH resource sequence number

the multiplexing feedback states corresponding, terminal forms based on M in feedback window ACK/NACK information, according to predefined corresponding relation, from

uplink control channel resource using as actual feedback of middle selection, in 4 kinds of QPSK modulation bit states corresponding to 4 constellation point of QPSK modulation generation, select one as actual feedback information b (0), b (1) simultaneously, on selected uplink control channel resource, send afterwards b (0), b (1).

If when ACK/NACK feedback information sends on PUSCH, the length of supposing feedback window is M, first two ACK/NACK information corresponding to code word is carried out to logical AND, the amount of bits o of its feedback ^aCKfor 1-4 bit, be defined as follows:

If PUSCH channel is indicated distribution by DCI form 0,

unless ( at U _dAI+ N _sPS=0 o'clock, terminal was not answered transferring ACK/nack message);

If PUSCH channel is not indicated distribution by DCI form 0, O ^aCK=min (M, 4), in the time the subframe that any downlink data distributes not detected, is set to NACK by feedback bits.

Can be found out by above analysis, although the multiplexing feedback model of ACK/NACK is compared with ACK/NACK bundled feedback pattern, avoid extra re-transmission, but, in the time of feeding back ACK/nack message on PUCCH, because actual feedback information is 2 bits, thereby can only adopt QPSK modulation system, this will have a strong impact on up covering power, especially in the time that terminal is positioned at sector-edge, now downlink data distribution will be a code word, and compared with bundled feedback pattern employing BPSK modulation system, covering performance has substantial degradation; When ACK/NACK information is in the time that PUSCH transmits, the quantity that feedback bits quantity is distributed according to the downlink data transmitting in the size of feedback window and feedback window is determined, the actual bit number of ACK/NACK information is 1-4 bit, also will be higher than the 1-2 bit of bundled feedback pattern.Therefore, the multiplexing feedback model of ACK/NACK is applicable to the terminal in center, sector.

Summary of the invention

The application provides method, terminal and the base station of a kind of uplink ACK/NACK binding transmission, to improve the efficiency of transfer of data, and improves the accuracy rate that judges subframe loss, false solution tune frame and correct demodulation subframe.

The method of a kind of uplink ACK/NACK binding transmission that the application provides, comprising:

A, terminal are indicated according to Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, determine the descending sub frame of continuously correct demodulation in feedback window, and on corresponding ascending resource feeding back ACK/nack message; Wherein, the sequence number of Physical Downlink Shared Channel (PDSCH) transmission of Physical Downlink Control Channel (PDCCH) indication of the employing DCI form 1/1A/1B/1D/2/2A/2B distributing in feedback window for base station, comprise and be used to indicate the PDCCH that semi-continuous scheduling (SPS) discharges, this value increases progressively continuously in feedback window;

The ACK/NACK information of B, base station sense terminals feedback, judges the descending sub frame of the continuously correct demodulation of terminal, and other downlink datas except the descending sub frame of continuously correct demodulation in feedback window is distributed and carry out new biography.

Preferably, described A comprises: terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, judge last continuous correctly sequence number n-k of the descending sub frame of demodulation in feedback window _m, and at corresponding Physical Uplink Control Channel (PUCCH) resource sequence number feeding back ACK/nack message;

computing formula be:

$n_{\mathrm{PUCCH},m}^{\left(1\right)}=(M-m-1)\&times;N_p+m\&times;N_{p+1}+n_{\mathrm{CCE}}+N_{\mathrm{PUCCH}}^{\left(1\right)}$

Wherein:

be configured by high level;

N _cCEfor subframe n-k _mthe sequence number of first CCE of the PDCCH of middle transmission, subframe n-k _mfor the sequence number of the descending sub frame of last continuously correct demodulation in feedback window, wherein m value is passed through table 1: descending associated sequence number set K determines;

terminal is from { picking out a p value, make N in 0,1,2,3} _p≤ n _cCE<N _p+1;

Table 1: descending associated sequence number set K:{k ₀, k ₁... k _m-1}

Preferably, described A comprises: terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, judge the quantity of the descending sub frame of continuously correct demodulation in feedback window, and adopting the upper transmission of Physical Uplink Shared Channel (PUSCH) the ACK/NACK information of corresponding scramble sequence scrambling.

Preferably, when there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is not the PDCCH of DCI form 0: in described A, terminal is at resource sequence number in last descending sub frame

feedback HARQ-ACK information; In described B, the situation that base station is distributed according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information;

When there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame: in described A, terminal is at resource sequence number

feedback HARQ-ACK information; In described B, ACK/NACK information is detected in base station first in the PUSCH resource of distributing to terminal, if can't detect, the situation of distributing according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information;

When there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame,: in described A, terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

continuity and the PDSCH without PDCCH indication of the high-level signaling indication position of transmit descending sub frame taking, judge last continuous correctly sequence number n-k of the descending sub frame of demodulation in feedback window _m, and at corresponding PUCCH resource sequence number feedback HARQ-ACK information; In described B, ACK/NACK information is detected in base station first in the PUSCH resource of distributing to terminal, if can't detect, the situation of distributing according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information;

When there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame, and, the descending sub frame of last continuously correct demodulation is the PDSCH transmission without PDCCH indication,: in described A, terminal is according to the subframe sequence number n-k ' of the previous descending sub frame of the descending sub frame of described last continuously correct demodulation _mcalculate the PUCCH resource sequence number of feedback HARQ-ACK information

and at PUCCH resource sequence number

upper feedback HARQ-ACK information, in described B, base station to correctly the PDSCH transmission without PDCCH indication of demodulation carry out new biography.

Preferably, when there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, or, when there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame:

In described A, j=N _bundledmod4, N _bundled=k, k is the quantity of the descending sub frame of the continuously correct demodulation of terminal, work as k=4,8 o'clock, scramble sequence sequence number j=3, if at least one descending sub frame, not by correct demodulation or loss, feeds back HARQ-NACK information on the PUSCH that adopts the scramble sequence scrambling that sequence number j is corresponding in feedback window, if all correct demodulation of the descending sub frame receiving in feedback window is fed back HARQ-ACK information on the PUSCH that adopts the scramble sequence scrambling that sequence number j is corresponding;

In described B, base station, according to the ACK/NACK information of scramble sequence sequence number j and feedback, judges the quantity of the downlink data distribution of the correct demodulation of terminal.

Preferably, before described A, the method further comprises:

Hold consultation to ACK/NACK bundled feedback pattern by the mode of Radio Resource control (RRC) Signalling exchange in terminal and base station.

Preferably, the TDDACK/NACK feedback model cell (tdd-AckNackFeedbackMode IE) that base station is set up Radio Resource control connection in (rrcConnectionSetup) message is configured to binding (bundling) or multiplexing (multiplexing), and is handed down to terminal;

Terminal adopts the feedback model of base station configuration to carry out transfer of data;

In the EUTRA ability IE of terminal in UE ability information (UECapabilityInformation) message, carry to show whether this terminal supports to carry out according to described steps A the indication information of ACK/NACK bundled feedback, will carry out ACK/NACK bundled feedback according to described steps A and be called Enhancedbundling ACK/NACK feedback model;

Terminal continues to adopt the feedback model of base station configuration to carry out transfer of data;

In the time that base station determines the ACK/NACK feedback model of terminal to reconfigure, send RRC connection to terminal and reshuffle (rrcConnectionReconfiguration) message, by the ACK/NACK feedback model notification terminal reconfiguring;

In the time that ACK/NACK feedback model changes by reallocation message, send RRC in terminal and connect the individual subframe of n (n >=3) after having reshuffled (rrcConnectionReconfigurationComplete) message, adopt the ACK/NACK feedback model reconfiguring to carry out ACK/NACK feedback.

Preferably, terminal have downlink data to distribute to lose or the feedback window of demodulation failure in, according to steps A to base station feedback HARQ-ACK information, if base station only requires terminal to carry out new biography to the part descending sub frame in feedback window, terminal can judge that this base station supports to carry out ACK/NACK bundled feedback according to steps A, follow-up continuation according to steps A to base station feedback ACK/NACK information, otherwise, in follow-up process according to prior art feeding back ACK/nack message.

A kind of terminal that the application provides, comprising: demodulation module and bundled feedback module, wherein:

Demodulation module, for what indicate according to Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, determine the continuous correctly descending sub frame of demodulation in feedback window; Wherein,

the sequence number of Physical Downlink Shared Channel (PDSCH) transmission of Physical Downlink Control Channel (PDCCH) indication of the employing DCI lattice 1/1A/1B/1D/2/2A/2B distributing in feedback window for base station, comprise and be used to indicate the PDCCH that semi-continuous scheduling (SPS) discharges, this value increases progressively continuously in feedback window

Bundled feedback module, for according to the continuous descending sub frame of correct demodulation in feedback window, feeding back ACK/nack message on corresponding ascending resource.

Preferably, this terminal further comprises: judge module:

Described judge module, for have downlink data to distribute to lose or the feedback window of demodulation failure in, notice demodulation module and bundled feedback module are in the manner described above to base station feedback HARQ-ACK information, if base station only requires terminal to carry out new biography to the part descending sub frame in feedback window, subsequent demodulation module and bundled feedback module continue aforesaid way to base station feedback ACK/NACK information, otherwise, in follow-up process according to prior art feeding back ACK/nack message.

A kind of base station that the application provides, comprising: detection module and retransmission process module, wherein:

Described detection module, for detection of the ACK/NACK information of terminal feedback, and judges the continuous correctly descending sub frame of demodulation of terminal;

Described retransmission process module, for distributing and carry out new biography other downlink datas except the descending sub frame of continuously correct demodulation in feedback window.

As seen from the above technical solution, the technical scheme that the application provides can reduce the meaningless re-transmission of current TD-LTEACK/NACK bundled feedback pattern, improves the efficiency of transfer of data; And, can judge more exactly subframe loss, false solution tune frame and correct demodulation subframe, the efficiency that HARQ is merged is higher, makes exterior ring power control more efficient (PDCCH or PDSCH descending power distribute).

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet that the application's one preferred base station and terminal are held consultation to ACK/NACK bundled feedback pattern by the mode of RRC Signalling exchange;

Fig. 2 is the composition structural representation of the application's one better terminal;

Fig. 3 is the composition structural representation of the application's one preferred base station;

Fig. 4 is that in the embodiment of the present application, downlink data distribution is carried out in base station, and indication correspondence with

three kinds of different situation schematic diagrames;

Fig. 5 is the not situation schematic diagram of the subframe of correct demodulation of a kind of existence in the embodiment of the present application;

Fig. 6 is the not situation schematic diagram of the subframe of correct demodulation of a kind of existence in the embodiment of the present application;

Fig. 7 is the not situation schematic diagram of the subframe of correct demodulation of a kind of existence in the embodiment of the present application.

Embodiment

For making the application's object, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the application is described in further detail.

The application's main thought is: propose a kind of improved ACK/NACK bundled feedback pattern, terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, judge last continuous correctly sequence number n-k of the descending sub frame of demodulation in feedback window _m, and at corresponding PUCCH resource sequence number feeding back ACK/nack message; Or terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B the continuity of value and the configuration information of semi-persistent scheduling, judge the quantity j of the descending sub frame of continuously correct demodulation in feedback window, and transmit ACK/NACK information on the PUSCH that adopts the scramble sequence scrambling that sequence number j is corresponding.Base station judges the terminal quantity that continuously downlink data of correct demodulation distributes according to the ACK/NACK information of terminal feedback, and supposition thinks that remaining downlink data distributes and all will lose, and these downlink datas distribution are carried out to new biography again.The improved ACK/NACK bundled feedback pattern that the application proposes can, in guaranteeing up covering power, greatly reduce the quantity of extra re-transmission, improves resource utilization.Described in the application, the descending sub frame of continuously correct demodulation comprises: have and do not have the PDSCH transmission of PDCCH indication and the PDCCH that indication SPS discharges.

Concrete scheme is described below:

In the application, the multiple uplink control channel resources of base station demodulation, its PUCCH resource sequence number is

the descending sub frame of M ACK/NACK information to be feedback in corresponding feedback window respectively.In order to reduce the complexity of base station demodulation, base station can be according to k in descending associated sequence number set K _mascending order (that is: descending sub frame order from back to front in feedback window) demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, 0≤m≤M-1, base station needs the big or small M that the maximum quantity of the PUCCH of demodulation is feedback window.

Preferably, indicate in strict accordance with monotonically increasing arranged in order DCI form 1/1A/1B/1D/2/2A/2B base station

Point situation is elaborated to present techniques scheme below:

The first situation: do not have the PDSCH transmission without PDCCH indication in feedback window, and last descending sub frame does not exist the PDCCH of DCI form 0.

Terminal is indicated according to DCI lattice 1/1A/1B/1D/2/2A/2B

continuity judge in feedback window that k downlink data distributes by correct demodulation continuously, and according to the descending sub frame sequence number n-k of the downlink data distribution of last continuous demodulation _mcalculate the PUCCH resource sequence number for HARQ-ACK feedback and on this PUCCH, feed back HARQ-ACK information.As previously mentioned, base station is by according to order demodulation descending sub frame n-k successively from back to front in feedback window _mcorresponding PUCCH, when base station is at uplink control channel resource

on while demodulating HARQ-ACK information, can judge descending sub frame n-k in feedback window _mbefore, comprise descending sub frame n-k _mk downlink data distribute by correct demodulation, and descending sub frame n-k in base station supposition feedback window _mdownlink data afterwards distributes to be lost, and the downlink data of losing is distributed to the new biography carrying out again.

The second situation: in feedback window, do not have the PDSCH transmission without PDCCH indication, and there is the PDCCH of DCI form 0 in last descending sub frame, base station to terminal distribution PUSCH resource for transferring ACK/nack message.In this case, be divided into again following two kinds of possible situations:

The situation that the first is possible: terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame.

In this case, terminal is by according to DCI lattice 1/1A/1B/1D/2/2A/2B indication

continuity judge in feedback window that k downlink data distributes by correct demodulation continuously, and according to the descending sub frame sequence number n-k of the downlink data distribution of last continuous demodulation _mcalculate the PUCCH resource sequence number for HARQ-ACK feedback

and on this PUCCH, feed back HARQ-ACK information.Due to base station to terminal distribution for the PUSCH resource of transferring ACK/nack message, ACK/NACK information will be detected in base station first in the PUSCH resource of distributing to this terminal, owing to can't detect, base station is by according to the situation of the downlink data of actual allocated in feedback window, according to k afterwards _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information, and according to PUCCH resource sequence number judge descending sub frame n-k in feedback window _mbefore, comprise descending sub frame n-k _mk downlink data distribute by correct demodulation, and descending sub frame n-k in base station supposition feedback window _mdownlink data afterwards distributes to be lost, and the downlink data of losing is distributed to the new biography carrying out again.

The situation that the second is possible: terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame, terminal is by the PUSCH transmitted over resources HARQ ACK/NACK information in base station assigns.Particularly:

Terminal basis

continuity judge in feedback window that k downlink data distributes by correctly demodulation continuously, N is set _bundled=k, and according to N _bundledcalculate scramble sequence sequence number j, j=N _bundledmod4, works as k=4, and 8 o'clock, the scramble sequence sequence number j=3 of employing, and the ACK/NACK information bit of feedback is ACK.

If according to

continuity and

judge that in feedback window, at least one downlink data distributes not by correct demodulation or loss, feed back NACK, if the downlink data receiving in feedback window distributes all correct demodulation, feeding back ACK.Base station according to scramble sequence sequence number j(here, base station blind check j, without the ACK/NACK information of calculating j) and feeding back, judge the quantity of the downlink data distribution of the continuously correct demodulation of terminal, and in base station supposition feedback window, other downlink data is lost, and these downlink datas are carried out to new biography again.

The third situation: existence does not have the PDSCH transmission of PDCCH indication in feedback window, and last descending sub frame exists the PDCCH of DCI form 0, base station to terminal distribution PUSCH resource for transferring ACK/nack message.In this case, be divided into again following two kinds of possible situations:

The situation that the first is possible: terminal does not correctly demodulate the PDCCH of last descending sub frame DCI form 0.

In this case, terminal is by according to DCI lattice 1/1A/1B/1D/2/2A/2B indication

continuity and the PDSCH without PDCCH indication of the high-level signaling indication position of transmitting the descending sub frame taking, judge the correct demodulation of k downlink data distribution quilt continuously in feedback window, and the descending sub frame sequence number n-k distributing according to the downlink data of last continuous demodulation _mcalculate the PUCCH resource sequence number for HARQ-ACK feedback and on this PUCCH, feed back HARQ-ACK information.Due to base station to terminal distribution for the PUSCH resource of transferring ACK/nack message, ACK/NACK information will be detected in base station first in the PUSCH resource of distributing to this terminal, owing to can't detect, base station is by according to the situation of the downlink data of actual allocated in feedback window, according to k afterwards _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information, and according to PUCCH resource sequence number

judge descending sub frame n-k in feedback window _mbefore, comprise descending sub frame n-k _mk downlink data distribute by correct demodulation, and descending sub frame n-k in base station supposition feedback window _mdownlink data afterwards distributes to be lost, and the downlink data of losing is distributed to the new biography carrying out again.

In the time that the downlink data of last continuously correct demodulation is assigned as the PDSCH transmission without PDCCH indication, the previous downlink data distributing is distributed to the subframe sequence number n-k ' at place according to this downlink data _mcalculate the PUCCH resource sequence number of feedback HARQ-ACK,

and feed back HARQ-ACK information in this control channel resource.Now, base station by correctly the PDSCH transmission without PDCCH indication of demodulation carry out new biography again.

The situation that the second is possible: terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame.The possible situation of the second in the same the second situation as previously mentioned of this situation, is no longer described specifically.

In the time of base station and/or the above-mentioned improved ACK/NACK bundled feedback pattern of terminal support the application, all need backward compatibility not support terminal and/or the base station of this feedback model, that is to say, no matter whether base station supports this function, supports and does not support that the terminal of this function can proper communication under this base station.Therefore, the application also proposes following two kinds of technical schemes, makes base station and terminal can judge whether opposite end supports above-mentioned improved ACK/NACK bundled feedback pattern.As described below, wherein scheme 1 and scheme 2 realize a kind of concrete scheme.

Scheme 1: by the mode of Radio Resource control (RRC) Signalling exchange.

First, be a kind of new TDD ACK/NACK feedback model by improved ACK/NACK bundled feedback mode-definition, be below designated as: Ehancedbundling.Revise existing tdd-AckNackFeedbackMode IE:

tdd-AckNackFeedbackMode?ENUMERATED{bundling,multiplexing,enhancedbundling}

Then, carry out alternately, specifically comprising the following steps according to Signalling exchange flow process as shown in Figure 1:

The 1st step: the tdd-AckNackFeedbackMode IE in rrcConnectionSetup message is configured to " bundling " or " multiplexing " by base station, and be handed down to terminal.

The 2nd step: the feedback model of " bundling " or " multiplexing " that adopt base station configuration is carried out transfer of data by follow-up RRC message terminal.

The 3rd step: carry and show whether this terminal supports the indication information of Enhancedbundling ACK/NACK feedback model in the EUTRA ability IE of terminal in UECapabilityInformation message.

Preferably, can in EUTRA ability IE, increase by 1 bit, show whether this terminal supports Enhancedbundling ACK/NACK feedback model, its Format Type is BOOLEAN type, " 0 " represents that this terminal do not support improved ACK/NACK bundled feedback pattern, " 1 " represents that this terminal supports improved ACK/NACK bundled feedback pattern, and this indication bit does not exist, and shows that this terminal do not support improved ACK/NACK bundled feedback pattern.

The 4th step: the feedback model that continues " bundling " or " multiplexing " that adopt base station configuration is carried out transfer of data by follow-up RRC message terminal.

The 5th step: in the time that base station determines the ACK/NACK feedback model of terminal to reconfigure, send rrcConnectionReconfiguration message to terminal, by the ACK/NACK feedback model notification terminal reconfiguring.

In this step, base station can be according to the EUTRA ability of terminal, or the range information of reference terminal and base station, preferably, base station can, by information judgements such as the CQI of terminal feedback, can be selected by rrcConnectionReconfiguration message, the ACK/NACK feedback model of terminal to be reconfigured.Suggestion is configured according to table 3:

Table 3

The 6th step: in the time that ACK/NACK feedback model changes by reallocation message, the individual subframe of n (n >=3) after terminal is sent rrcConnectionReconfigurationComplete message, adopts the improved ACK/NACK bundled feedback pattern reconfiguring to carry out ACK/NACK feedback.

Scheme 2: only increase and judge whether base station supports the functional module of improved ACK/NACK bundled feedback pattern in terminal.

For the terminal of supporting this improved ACK/NAC bundled feedback pattern, need to increase a judge module, for judging whether current base station supports the feedback model of this improved ACK/NAC binding.Concrete scheme is as follows:

This function judge module is selected suitable feedback window, be in feedback window, to have downlink data to distribute to lose or demodulation failure, for such feedback window, carry out HARQ-ACK feedback according to improved ACK/NACK bundled feedback pattern, if base station is only required terminal and the part downlink data in feedback window is distributed to the new biography carrying out again, terminal can judge that this base station supports the feedback model of this improved ACK/NAC binding, in follow-up process, this feedback model of continuations employing is carried out to HARQ-ACK feedback; Otherwise, if base station requires terminal interior M the whole downlink data distribution of new biography feedback window again, terminal can be judged this base station and not support this improved ACK/NACK bundled feedback pattern, will be according to prior art feeding back ACK/NACK in follow-up process.In order to guarantee the reliability of judgement, this judge module can select m applicable feedback window to judge, m value can arrange flexibly.

Corresponding to said method, disclosed herein as well is a kind of terminal, as shown in Figure 2, this terminal comprises: demodulation module 210 and bundled feedback module 220, wherein:

Demodulation module 210, for what indicate according to Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, determine the continuous correctly descending sub frame of demodulation in feedback window; Wherein,

the sequence number of Physical Downlink Shared Channel (PDSCH) transmission of Physical Downlink Control Channel (PDCCH) indication of the employing DCI form 1/1A/1B/1D/2/2A/2B distributing in feedback window for base station, comprise and be used to indicate the PDCCH that semi-continuous scheduling (SPS) discharges, this value increases progressively continuously in feedback window

Bundled feedback module 220, for according to the continuous descending sub frame of correct demodulation in feedback window, feeding back ACK/nack message on corresponding ascending resource.

In this terminal, can further include: judge module 230;

Described judge module 230, for have downlink data to distribute to lose or the feedback window of demodulation failure in, notice demodulation module 210 and bundled feedback module 220 are in the manner described above to base station feedback HARQ-ACK information, if base station only requires terminal to carry out new biography to the part descending sub frame in feedback window, subsequent demodulation module 210 and bundled feedback module 220 continue aforesaid way to base station feedback ACK/NACK information, otherwise, in follow-up process according to prior art feeding back ACK/nack message.

Disclosed herein as well is a kind of base station, as shown in Figure 3, this base station comprises: detection module 310 and retransmission process module 320, wherein:

Described detection module 310, for detection of the ACK/NACK information of terminal feedback, and judges the continuous correctly descending sub frame of demodulation of terminal;

Described retransmission process module 320, for distributing and carry out new biography other downlink datas except the descending sub frame of continuously correct demodulation in feedback window.

Technical scheme the application being proposed below by a preferred embodiment is further elaborated.

The application supposes following application scenarios: TD-LTE ascending-descending subframes is configured to 2, and special subframe proportioning is 7, the big or small M=4 of feedback window, and the descending sub frame of the M in feedback window has data allocations.

In the present embodiment, base station is 4 uplink control channel resources of demodulation on subframe n, and its PUCCH resource sequence number is

4 descending sub frames to be feedback in corresponding feedback window respectively, and indicate in strict accordance with monotonically increasing order-assigned DCI form 1/1A/1B/1D/2/2A/2B base station

specifically as shown in Figure 4.Fig. 4 shows base station and carries out downlink data distribution, and indication correspondence

with

three kinds of different situations, wherein, feedback window comprises descending sub frame: subframe 9, subframe 0, subframe 1 and subframe 3, a point situation describes below:

The first situation, supposes not exist in feedback window the downlink data of semi-persistent scheduling to distribute, and last descending sub frame do not exist the PDCCH of DCI form 0, as shown in Fig. 4 the first row.

In this case, support the terminal of this function to select PUCCH channel resource sequence number according to table 4

carry out HARQ-ACK feedback:

Table 4:TD-LTE HARQ-ACK feedback mapping table

Wherein:

$n_{\mathrm{PUCCH},m}^{\left(1\right)}=(M-m-1)\&times;N_p+m\&times;N_{p+1}+n_{\mathrm{CCE},m}+N_{\mathrm{PUCCH}}^{\left(1\right)};$

Subframe n-k in feedback window _m(comprise subframe n-k before _m) k descending sub frame by correct demodulation, n _{cCE, m}subframe n-k in feedback window _min first CCE sequence number of PDCCH, M=4.。

When base station is at uplink control channel resource

on detect after HARQ-ACK, judge subframe n-k in feedback window _m(comprise subframe n-k before _m) k descending sub frame by correct demodulation, subframe n-k _mdownlink data afterwards distributes to be lost, and the downlink data that new biography is lost is again distributed.

The second situation: suppose not exist in feedback window the downlink data of semi-persistent scheduling to distribute, and there is the PDCCH of DCI form 0 in last descending sub frame, be base station to terminal distribution PUSCH resource for transferring ACK/nack message, as shown in Fig. 4 the second row.This situation is divided into again following several possible situation:

The situation that the first is possible: suppose that terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame, as shown in Figure 5.

When

downlink data distribute and lose or the incorrect timing of separating, terminal is selected PUCCH channel resource sequence number according to table 4

carry out HARQ-ACK feedback.Now, base station can't detect any data in the PUSCH resource of distributing to this terminal, so, and first in PUCCH channel resource sequence number

upper detection HARQ-ACK, when base station is at uplink control channel resource

on detect after HARQ-ACK, judge subframe 3, the downlink data on the 4th descending sub frame distributes and loses in feedback window, and the downlink data in new biography subframe 3 is again distributed.

The situation that the second is possible: suppose that terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame, so, terminal is carried out HARQ ACK/NACK feedback according to table 5:

Table 5:TD-LTE HARQ ACK/NACK feedback mapping table

The new TD-LTE base station of supporting the application to improve technical scheme judges according to the combination of scramble sequence sequence number j and ACK/NACK information the quantity that the downlink data of the correct demodulation of terminal distributes, and remaining downlink data is distributed to the new biography carrying out again.

The third situation: the subframe 0 of supposing feedback window exists the downlink data of semi-persistent scheduling to distribute, and last descending sub frame exists the PDCCH of DCI form 0, and base station is used for transferring ACK/nack message to terminal distribution PUSCH resource, as shown in Fig. 4 the third line.This situation is divided into again following several possible situation:

The situation that the first is possible: suppose that terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame.

As shown in Figure 6, when

downlink data distribute and lose or the incorrect timing of separating, terminal is selected PUCCH channel resource sequence number according to table 4

carry out HARQ-ACK feedback.Now, base station can't detect any data in the PUSCH resource of distributing to this terminal, so, and first in PUCCH channel resource sequence number upper detection HARQ-ACK, when base station is at uplink control channel resource

on detect after HARQ-ACK, judge downlink data in subframe 3 and distribute and lose, the downlink data in new biography subframe 3 is again distributed.

As shown in Figure 7, when

with

downlink data distribute and lose or the incorrect timing of separating,

the previous downlink data that distributes of downlink data be assigned as the PDSCH transmission that does not have PDCCH to support, now terminal is selected PUCCH channel resource sequence number send HARQ-ACK.Now, base station can't detect any data in the PUSCH resource of distributing to this terminal, will be according to k _mdescending order demodulation PUCCH channel designator

when base station is at uplink control channel resource

on detect after HARQ-ACK, judge subframe 0,1, the downlink data on 3 distributes to exist to be lost, the downlink data in new biography subframe 0,1,3 distributes again.

The situation that the second is possible: terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame.

Terminal is carried out HARQ ACK/NACK feedback according to table 5, the new TD-LTE base station of supporting the application to improve technical scheme judges according to the combination of scramble sequence sequence number j and ACK/NACK information the quantity that the downlink data of the correct demodulation of terminal distributes, and remaining downlink data is distributed to the new biography carrying out again.

Application the application, can reduce the meaningless re-transmission of current TD-LTE ACK/NACK bundled feedback pattern, improves efficiency of transmission; Can judge more exactly subframe loss, false solution tune frame and correct demodulation subframe, the efficiency that HARQ is merged is higher, makes exterior ring power control more efficient (PDCCH or PDSCH descending power distribute).

In addition, the application has also proposed the method for two kinds of interoperability in the time that base station or terminal are supported this function, no matter whether base station supports this improved HARQ ACKNACK bundled feedback pattern, the terminal of supporting and do not support this function also can proper communication under this base station, makes not support the existing network terminal of this improved HARQ ACK/NACK bundled feedback pattern can carry out proper communication with the base station of supporting this improved HARQ ACK/NACK bundled feedback pattern without any need for revising.

The foregoing is only the application's preferred embodiment, not in order to limit the application, all within the application's spirit and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.

Claims (11)

1. a method for uplink ACK/NACK binding transmission, is characterized in that, comprising:

A, terminal are indicated according to Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, determine the descending sub frame of continuously correct demodulation in feedback window, and on corresponding ascending resource feeding back ACK/nack message; Wherein,

the sequence number of Physical Downlink Shared Channel (PDSCH) transmission of Physical Downlink Control Channel (PDCCH) indication of the employing DCI form 1/1A/1B/1D/2/2A/2B distributing in feedback window for base station, comprise and be used to indicate the PDCCH that semi-continuous scheduling (SPS) discharges, this value increases progressively continuously in feedback window;

The ACK/NACK information of B, base station sense terminals feedback, judges the descending sub frame of the continuously correct demodulation of terminal, and other downlink datas except the descending sub frame of continuously correct demodulation in feedback window is distributed and carry out new biography.

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

Described A comprises: terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, judge last continuous correctly sequence number n-k of the descending sub frame of demodulation in feedback window _m, and at corresponding Physical Uplink Control Channel (PUCCH) resource sequence number

feeding back ACK/nack message;

computing formula be:

$n_{\mathrm{PUCCH},m}^{\left(1\right)}=(M-m-1)\&times;N_p+m\&times;N_{p+1}+n_{\mathrm{CCE}}+N_{\mathrm{PUCCH}}^{\left(1\right)}$

Wherein:

be configured by high level;

N _cCEfor subframe n-k _mthe sequence number of first CCE of the PDCCH of middle transmission, subframe n-k _mfor the sequence number of the descending sub frame of last continuously correct demodulation in feedback window, wherein m value is passed through table 1: descending associated sequence number set K determines;

terminal is from { picking out a p value, make N in 0,1,2,3} _p≤ n _cCE<N _p+1;

Table 1: descending associated sequence number set K:{k ₀, k ₁... k _m-1}

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

Described A comprises: terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B the continuity of value and the configuration information of semi-persistent scheduling, judge the quantity of the descending sub frame of continuously correct demodulation in feedback window, and adopting the upper transmission of Physical Uplink Shared Channel (PUSCH) the ACK/NACK information of corresponding scramble sequence scrambling.

4. method according to claim 2, is characterized in that:

When there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is not the PDCCH of DCI form 0: in described A, terminal is at resource sequence number in last descending sub frame

feedback HARQ-ACK information; In described B, the situation that base station is distributed according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is pUCCH, until demodulate HARQ-ACK information;

When there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame: in described A, terminal is at resource sequence number

feedback HARQ-ACK information; In described B, ACK/NACK information is detected in base station first in the PUSCH resource of distributing to terminal, if can't detect, the situation of distributing according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information;

When there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame,: in described A, terminal is indicated according to DCI form 1/1A/1B/1D/2/2A/2B

continuity and the PDSCH without PDCCH indication of the high-level signaling indication position of transmit descending sub frame taking, judge last continuous correctly sequence number n-k of the descending sub frame of demodulation in feedback window _m, and at corresponding PUCCH resource sequence number

feedback HARQ-ACK information; In described B, ACK/NACK information is detected in base station first in the PUSCH resource of distributing to terminal, if can't detect, the situation of distributing according to downlink data actual in feedback window, according to k _mascending order is demodulation descending sub frame n-k successively _mcorresponding resource sequence number is

pUCCH, until demodulate HARQ-ACK information;

When there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal does not correctly demodulate the PDCCH of the DCI form 0 in last descending sub frame, and, the descending sub frame of last continuously correct demodulation is the PDSCH transmission without PDCCH indication,: in described A, terminal is according to the subframe sequence number n-k ' of the previous descending sub frame of the descending sub frame of described last continuously correct demodulation _mcalculate the PUCCH resource sequence number of feedback HARQ-ACK information

and at PUCCH resource sequence number

upper feedback HARQ-ACK information, in described B, base station to correctly the PDSCH transmission without PDCCH indication of demodulation carry out new biography.

5. method according to claim 3, is characterized in that:

When there not being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, or, when there being the PDSCH transmission without PDCCH indication in feedback window, and while there is the PDCCH of DCI form 0 in last descending sub frame, if terminal correctly demodulates the PDCCH of the DCI form 0 in last descending sub frame:

In described A, j=N _bundledmod4, N _bundled=k, k is the quantity of the descending sub frame of the continuously correct demodulation of terminal, work as k=4,8 o'clock, scramble sequence sequence number j=3, if at least one descending sub frame, not by correct demodulation or loss, feeds back HARQ-NACK information on the PUSCH that adopts the scramble sequence scrambling that sequence number j is corresponding in feedback window, if all correct demodulation of the descending sub frame receiving in feedback window is fed back HARQ-ACK information on the PUSCH that adopts the scramble sequence scrambling that sequence number j is corresponding;

In described B, base station, according to the ACK/NACK information of scramble sequence sequence number j and feedback, judges the quantity of the downlink data distribution of the correct demodulation of terminal.

6. according to the method described in claim 1 to 5 any one, it is characterized in that, before described A, the method further comprises:

Hold consultation to ACK/NACK bundled feedback pattern by the mode of Radio Resource control (RRC) Signalling exchange in terminal and base station.

7. method according to claim 6, is characterized in that, described negotiation comprises:

The TDDACK/NACK feedback model cell (tdd-AckNackFeedbackMode IE) that base station is set up Radio Resource control connection in (rrcConnectionSetup) message is configured to binding (bundling) or multiplexing (multiplexing), and is handed down to terminal;

Terminal adopts the feedback model of base station configuration to carry out transfer of data;

In the EUTRA ability IE of terminal in UE ability information (UECapabilityInformation) message, carry to show whether this terminal supports to carry out according to described steps A the indication information of ACK/NACK bundled feedback, will carry out ACK/NACK bundled feedback according to described steps A and be called Enhancedbundling ACK/NACK feedback model;

Terminal continues to adopt the feedback model of base station configuration to carry out transfer of data;

In the time that base station determines the ACK/NACK feedback model of terminal to reconfigure, send RRC connection to terminal and reshuffle (rrcConnectionReconfiguration) message, by the ACK/NACK feedback model notification terminal reconfiguring;

In the time that ACK/NACK feedback model changes by reallocation message, send RRC in terminal and connect the individual subframe of n (n >=3) after having reshuffled (rrcConnectionReconfigurationComplete) message, adopt the ACK/NACK feedback model reconfiguring to carry out ACK/NACK feedback.

8. according to the method described in claim 1 to 5 any one, it is characterized in that:

Terminal have downlink data to distribute to lose or the feedback window of demodulation failure in, according to steps A to base station feedback HARQ-ACK information, if base station only requires terminal to carry out new biography to the part descending sub frame in feedback window, terminal can judge that this base station supports to carry out ACK/NACK bundled feedback according to steps A, follow-up continuation according to steps A to base station feedback ACK/NACK information, otherwise, in follow-up process according to prior art feeding back ACK/nack message.

9. a terminal, is characterized in that, comprising: demodulation module and bundled feedback module, wherein: demodulation module, for what indicate according to Downlink Control Information (DCI) form 1/1A/1B/1D/2/2A/2B

the continuity of value and the configuration information of semi-persistent scheduling, determine the continuous correctly descending sub frame of demodulation in feedback window; Wherein,

the sequence number of Physical Downlink Shared Channel (PDSCH) transmission of Physical Downlink Control Channel (PDCCH) indication of the employing DCI form 1/1A/1B/1D/2/2A/2B distributing in feedback window for base station, comprise and be used to indicate the PDCCH that semi-continuous scheduling (SPS) discharges, this value increases progressively continuously in feedback window

Bundled feedback module, for according to the continuous descending sub frame of correct demodulation in feedback window, feeding back ACK/nack message on corresponding ascending resource.

10. terminal according to claim 9, is characterized in that, this terminal further comprises: judge module:

Described judge module, for have downlink data to distribute to lose or the feedback window of demodulation failure in, notice demodulation module and bundled feedback module are in the manner described above to base station feedback HARQ-ACK information, if base station only requires terminal to carry out new biography to the part descending sub frame in feedback window, subsequent demodulation module and bundled feedback module continue aforesaid way to base station feedback ACK/NACK information, otherwise, in follow-up process according to prior art feeding back ACK/nack message.

11. 1 kinds of base stations, is characterized in that, comprising: detection module and retransmission process module, wherein:

Described detection module, for detection of the ACK/NACK information of terminal feedback, and judges the continuous correctly descending sub frame of demodulation of terminal;

Described retransmission process module, for distributing and carry out new biography other downlink datas except the descending sub frame of continuously correct demodulation in feedback window.

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