CN103580827A

CN103580827A - Method and equipment for transmitting HARQ-ACK information

Info

Publication number: CN103580827A
Application number: CN201210282817.3A
Authority: CN
Inventors: 孙程君; 李迎阳
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2012-08-09
Filing date: 2012-08-09
Publication date: 2014-02-12

Abstract

The invention provides a method for transmitting HARQ-ACK information. The method comprises the steps that UE receives a PDCCH and a PDSCH which are sent by a base station, wherein the PDCCH comprises DAI information and information of the size of a binding window; the UE decodes the PDSCH inside the binding window to generate corresponding HARQ-ACK information, and the HARQ-ACK information is fed back to the base station by the adoption of a channel selection method according to the DAI information and the information of the size of the binding window. The invention further provides another method for transmitting HARQ-ACK information. The method comprises the steps that UE receives a PDCCH and a PDSCH which are sent by a base station, wherein the PDCCH comprises DAI information; the UE decodes the PDSCH inside a binding window to generate corresponding HARQ-ACK information and a channel selection method is adopted to feed back the HARQ-ACK information to the base station according to the DAI information and SPS related information. The invention further provides the UE. By the adoption of the technical scheme, the HARQ-ACK information feedback based on channel selection can be supported and the performance for feeding back the HARQ-ACK information can be improved.

Description

The method and apparatus of transmitting HARQ-ACK information

Technical field

The application relates to mobile communication technology field, and particularly, the application relates in can changing flexibly the TDD CA system of subframe duplex directions, the method and apparatus of method transmitting HARQ-ACK information of selecting based on channel.

Background technology

Long Term Evolution (LTE) system is supported the working method of time division duplex (TDD).The frame structure of TDD system as shown in Figure 1.The length of each radio frames is 10ms, and it is divided into the field that two length are 5ms.Each field comprises time slot and 3 special domain that 8 length are 0.5ms, i.e. descending pilot frequency time slot (DwPTS), protection interval (GP) and uplink pilot time slot (UpPTS), the length of these 3 special domain be 1ms.Each subframe consists of two continuous time slots, and k subframe comprises time slot 2k and time slot 2k+1.In TDD system, support 7 kinds of upstream and downstream configurations, as shown in table 1.Here, D represents descending sub frame, and U represents sub-frame of uplink, and S represents the above-mentioned special subframe that comprises 3 special domain.

The upstream and downstream configuration of table 1LTE TDD

In LTE TDD system, the unit that resource is distributed is Physical Resource Block (PRB), and a PRB comprises 12 continuous subcarriers in frequency, in time a corresponding time slot.Front n OFDM symbol of a descending sub frame is used for transmitting Downlink Control Information, comprises Physical Downlink Control Channel (PDCCH) and other control informations, and remaining OFDM symbol is used for transmitting PDSCH.In the later release of LTE, enhancing PDCCH(ePDCCH has also been proposed) concept, difference is that ePDCCH is that the data area that is mapped to subframe sends, ePDCCH and PDSCH are frequency division multiplexing (FDM).Below if no special instructions, do not need differentiated treatment PDCCH and ePDCCH, and be referred to as PDCCH.

The PDSCH resource in same descending sub frame is distributed by the PDCCH that comprises downstream grants signaling in base station, UE receives PDSCH decoding after receiving downstream grants signaling, then according to certain timing relationship, in a follow-up sub-frame of uplink, send the HARQ-ACK information to this PDSCH.Because TDD supports multiple uplink-downlink configuration, in a sub-frame of uplink n, can feed back HARQ-ACK information corresponding to PDCCH that PDSCH in 0,1 or a plurality of descending sub frame or indicating downlink semi-persistent scheduling discharge (SPS release).Here, the set of the descending sub frame in same sub-frame of uplink n internal feedback HARQ-ACK information is called to binding window.The index of the descending sub frame in binding window is n-k, and wherein k belongs to set K, and set K is determined by uplink-downlink configuration and sub-frame of uplink n, as shown in table 2.

Table 2: index set K

In LTE TDD system, owing to binding the big or small M of window, can be greater than 1, and transfer of data in each descending sub frame is independent scheduling, in order to make subscriber equipment (UE) can correctly judge whether it has lost one or more PDCCH information that base station sends, introduced descending distribution indication (DAI) technology.Specifically, the PDCCH information of a descending sub frame of DAI sign is which PDCCH in current binding window.Here, DAI territory comprises 2 bits, can indicate 4 values, thereby is 1,2,3,4 o'clock when binding the big or small M of window, does not have the problem of obscuring.

For the UE that only configures a Cell, can use method that channel selects (Channel Selection) row control channel (PUCCH) feedback HARQ-ACK information physically.Specifically:

When the big or small M of binding window equals 1, a descending sub frame in this binding window is obtained to the channel of a PUCCH form 1a/1b, then according to transmission block (TB) number in user's downlink transfer pattern, if TB number is 1, with PUCCH form 1a/1b, feed back 1 bit HARQ-ACK information, if TB number is 2, with PUCCH form 1a/1b, feed back 2 bit HARQ-ACK information;

When the big or small M of binding window is greater than 1 and while being less than or equal to 4, first the HARQ-ACK information of each descending sub frame in this binding window carried out to space binding, be that each descending sub frame obtains 1 bit binding HARQ-ACK information, and each descending sub frame is obtained respectively to the channel of an alternative PUCCH form 1a/1b, finally, a QPSK constellation point selecting the channel of a PUCCH form 1a/1b and take this channel is fed back the HARQ-ACK information of M bit.

Obviously, when the downlink transfer pattern of UE configuration need to be transmitted 2 TB simultaneously, at binding window size, M equals at 1 o'clock, can feed back HARQ-ACK information in optimization ground, but when M is greater than 1 and while being less than or equal to 4, owing to having used space binding, certain performance loss will be brought.

If table 3 is that 4 bit channels that adopt in LTE version 10 are selected mapping form.In order to reduce feedback overhead, generally do not distinguish NACK and DTX, a unique exception is, when 4 bits are all NACK or DTX, can distinguish NACK and DTX to first bit HARQ-ACK (0), " NACK, NACK/DTX, NACK/DTX; NACK/DTX " and " DTX; NACK/DTX, NACK/DTX, NACK/DTX " can indicate respectively.That is to say, the mapping form of table 3 has the function of distinguishing ACK, NACK and DTX state to a certain extent to first bit HARQ-ACK (0).

Table 3:4 bit channel is selected mapping table

In enhancing (LTE-A) system of LTE system, be to obtain larger bandwidth of operation by combining a plurality of unit carrier wave (CC), carrier combination (CA), forms the descending and up link of communication system, thereby supports higher transmission rate.To a UE, base station can configure it and work in a plurality of Cell, and one of them is main Cell(Pcell), and other Cell are called time Cell(Scell).

When a plurality of Cell that condense together adopt identical uplink-downlink configuration, the HARQ-ACK information of all Cell is fed back on the sub-frame of uplink of Pcell, and can the completely multiplexing HARQ-ACK timing relationship in LTE version 8, a Cell being defined as shown in table 2.When a plurality of Cell of CA adopt different uplink-downlink configuration, remain the HARQ-ACK information of feeding back all Cell on the sub-frame of uplink of Pcell, and be that the HARQ-ACK timing relationship of one of 7 kinds of existing uplink-downlink configuration of multi-meter 1 is as the HARQ-ACK timing relationship of the PDSCH on Scell.

To having configured the UE that works in CA pattern of two Cell, the method that can select based on channel is fed back the HARQ-ACK information of maximum 4 bits of two configured Cell.The binding window size M that supposes two Cell equates,, when M equals 1, does not carry out space binding, but feeds back the HARQ-ACK information of each TB of two Cell; When M equals 2, carry out space binding, each descending sub frame of each Cell is obtained the binding HARQ-ACK information of a bit, thereby each Cell is obtained respectively to the binding HARQ-ACK information of 2 bits.When M is greater than 2 and while being less than or equal to 4, carry out space binding, each descending sub frame of each Cell is obtained to a bit binding HARQ-ACK information, then further the feedback information bits of each Cell was bound and is compressed into 2 bits by the time.

As table 4 and table 5 show respectively the M=3 of definition in LTE version 10 and the time binding method of M=4.The concrete grammar that HARQ-ACK information is carried out to time binding is: first, DAI technology based in above-mentioned LTE, the order that HARQ-ACK information corresponding to PDCCH that need to feed back HARQ-ACK information to each increases progressively according to DAI sorts, here, if there is SPS business, its HARQ-ACK information comes foremost; Then, according to table 4 or table 5, carry out time binding.

In table 4 and table 5, every kind of mapping status is indicated certain combination of the continuous a plurality of HARQ-ACK information that start from first HARQ-ACK information, and the arbitrary value that remaining HARQ-ACK information is ACK/NACK/DTX below.It is to be noted, in the time of M=4 shown in table 5 binding method, mapping status " A; N/D " and " N; N/D " have all represented two kinds of different continuous ACK numbers that start from first HARQ-ACK information, under extreme case, this may cause obscuring of base station and UE, and causes hydraulic performance decline.In table 4 and table 5, N represents NACK, and A represents ACK, and D represents DTX, symbol "/" represent or.

The time binding method of table 4:M=3

HARQ-ACK(0),HARQ-ACK(1),HARQ-ACK(2)	The state of mapping
		A,A,A	A,A
A,A,N/D	N/D,A
		A,N/D,any	A,N/D
N,any,any	N,N/D
		D,any,any	D,N/D

The time binding method of table 5:M=4

Obviously, when the downlink transfer pattern of UE configuration need to be transmitted 2 TB simultaneously, at binding window size, M equals at 1 o'clock, can feed back HARQ-ACK information in optimization ground; When M equals 2, owing to having used space binding, certain performance loss will be brought; And be greater than 2 and while being less than or equal to 4 as M, owing to having used space binding and time to bind simultaneously, performance loss is by the situation that is greater than M and equals 2.Especially to equal the time binding method HARQ-ACK Information Compression amount that the time binding method in 4 situation equals in 3 situations than M larger for M, and owing to having adopted the method for repeating mapping, therefore, it is poorer that the Performance Ratio M that M equals 4 situation equals 3 situation.

The upstream and downstream configuration adopting in existing LTE TDD standard Zhong， community configures by broadcast signaling, is included in system information block 1(SIB1) in broadcast.Like this, the fastest 640ms of LTE system support changes a uplink-downlink configuration, and according to existing standard, changes at most 32 subsystem information within 3 hours.For the variation of adaptation service characteristic quickly, at present 3GPP organizes the distribution of studying ascending-descending subframes how to support to change at faster speed system.For example, support to change at faster speed uplink-downlink configuration, as 200ms changes once; Or the time that is supported in wireless this magnitude of frame length 10ms changes uplink-downlink configuration.In fact, base station dispatcher changes the distribution of ascending-descending subframes according to business demand, and adopts certain scheduling restriction to maintain system normally to move, and UE can not need to know current which in above-mentioned 7 kinds of uplink-downlink configuration of working in.Even, the distribution of the ascending-descending subframes of real work can be not limited to 7 kinds of uplink-downlink configuration in above-mentioned table 1, and actual ascending-descending subframes distribution can be transparent to UE.The Cell that can change at faster speed that below this ascending-descending subframes distributed is called the Cell that ascending-descending subframes distributes and changes flexibly, and the subframe that duplex directions in table 1 is variable is called flexible sub-frame.

The Cell that distributes and can change flexibly for ascending-descending subframes, the actual size that sub-frame of uplink will feed back the binding window of HARQ-ACK channel changes, in this case, how on uplink method, to support the HARQ-ACK transmission of selecting based on channel to have to be solved.

Summary of the invention

The application proposes a kind of in the TDD CA system of duplex directions of supporting flexible variation subframe, selects the method and apparatus of transmitting HARQ-ACK information based on channel, to improve the performance of UE feedback HARQ-ACK information.

The method of a kind of transmitting HARQ-ACK information that the application provides, comprises the following steps:

Subscriber equipment (UE) receives Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) that base station sends, and wherein, comprises the information of descending distribution indication (DAI) information and binding window size in PDCCH;

UE decodes to the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the information of DAI information and binding window size.

Preferably, can in PDCCH, indicate the value M of binding window size.

Preferably, also can in PDCCH, indicate the value M of binding window size to equal 1 or be greater than 1.

Preferably, the situation that can also equal 1 to DAI value in PDCCH, the value M of indication binding window size.

Preferably, can also in PDCCH, indicate the value M of binding window size to be less than or equal to 2 or be greater than 2.

Preferably, the information of described binding window size can be: at a sub-frame of uplink, need to feed back the number of sub-frames in the maximum downstream subframe set of HARQ-ACK information, or in the set of described maximum downstream subframe, be currently available for the number of sub-frames in the descending sub frame set of downlink transfer, or in the set of described maximum downstream subframe base station century be the number of the downlink transfer of UE scheduling.

Preferably, can indicate by the neofield increasing the information of described binding window size in PDCCH.

Preferably, also can indicate by the DAI territory in multiplexing PDCCH the information of described binding window size.

Preferably, when M equals 1, UE does not carry out space binding to HARQ-ACK information, adopts PUCCH form 1a/1b channel feedback HARQ-ACK information; When M is greater than 1, UE binds HARQ-ACK information and executing space, and according to M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping table to adopt channel to select; Wherein, M _rfor reference binding window size.

Preferably, when M is less than or equal to 2, UE, to the binding of HARQ-ACK information and executing space, does not feed back all HARQ-ACK bits; When M is greater than 2, UE binds HARQ-ACK information and executing space, and according to M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping table to adopt channel to select; Wherein, M _rfor reference binding window size.

The application also provides a kind of method of transmitting HARQ-ACK information, comprises the following steps:

UE receives PDCCH and the PDSCH that base station sends, and wherein, comprises DAI information in PDCCH;

UE decodes to the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the DAI information information relevant with semi-persistent scheduling (SPS).

Preferably, the described method according to DAI information and the selection of other information employing channel can comprise to base station feedback HARQ-ACK information:

UE shines upon the HARQ-ACK information of each dynamic downlink transfer from first bit successively according to its corresponding DAI value order, if there is SPS business, HARQ-ACK information corresponding to SPS business is mapped to M _rindividual bit; Then, UE is based on M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping table to adopt channel to select; Wherein, M _rfor reference binding window size.

The HARQ-ACK information that SPS business is corresponding is mapped to first bit, and the HARQ-ACK information of each dynamic downlink transfer is shone upon since the 2nd bit successively according to corresponding DAI value order; Then, UE is based on M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping table to adopt channel to select; Wherein, M _rfor reference binding window size.

The application provides a kind of subscriber equipment, comprising:

Receiver module, the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) that for receiving base station, send, wherein, comprise the information of descending distribution indication (DAI) information and binding window size in PDCCH;

Feedback module, for according to the decoded result of the PDSCH in binding window, generates corresponding HARQ-ACK information, and the method for selecting according to the information employing channel of DAI information and binding window size is to base station feedback HARQ-ACK information.

The application also provides a kind of subscriber equipment, comprising:

Receiver module, the PDCCH and the PDSCH that for receiving base station, send, wherein, comprise DAI information in PDCCH;

Feedback module, for according to the decoded result of the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the DAI information information relevant with semi-persistent scheduling (SPS).

As seen from the above technical solution, in the application, first UE receives PDCCH and the PDSCH that base station sends, then according to the information of the DAI information comprising in PDCCH and binding window size, adopt the method for channel selection to base station feedback HARQ-ACK information, thereby realized, support to select to feed back HARQ-ACK information based on channel, and improved the performance of feedback HARQ-ACK information.

Accompanying drawing explanation

Fig. 1 is the frame structure schematic diagram of existing TDD system;

Fig. 2 is that the application one preferably selects the schematic flow sheet of the method for transmitting HARQ-ACK information based on channel;

Fig. 3 be the application another preferably based on channel, select the schematic flow sheet of the method for transmitting HARQ-ACK information;

Fig. 4 is the schematic diagram of mapping HARQ-ACK bit;

Fig. 5 is the composition structural representation of the application's one better subscriber equipment.

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 Cell that distributes and can change flexibly for ascending-descending subframes, the duplex directions of one part subframe is changeless, and other subframes are flexible sub-frame, its duplex directions is variable.For example, the DwPTS in subframe 0, subframe 5, subframe 1 and the DwPTS in subframe 6 are fixed for descending duplex directions; UpPTS in subframe 2, subframe 1 and the UpPTS in subframe 6 are fixed for up duplex directions; And subframe 3,4,7,8 and 9 these 5 subframes can determine that it is subframe or the flexible sub-frame of fixedly duplex directions according to some other information.

The Cell that distributes and can change flexibly for ascending-descending subframes, for backward compatibility is not supported the UE of flexible sub-frame, need in broadcast message SIB1, send according to the method for existing LTE version a TDD uplink-downlink configuration, be called SIB1 uplink-downlink configuration, thereby make allly not support the UE of flexible sub-frame all according to this SIB1 uplink-downlink configuration, normally to receive and dispatch up-downgoing data.And to supporting the UE of flexible sub-frame, because a part of sub-frame of uplink in SIB1 uplink-downlink configuration can be changed to descending sub frame flexibly, in order to support descending HARQ-ACK transmission, to all fixedly descending sub frames and flexible sub-frame, all need to define its corresponding HARQ-ACK timing position.

Here, a kind of possible method is: define the set of some subframes, and the respectively corresponding sub-frame of uplink of each set, if having downlink transfer in certain set, so, its HARQ-ACK information is transmitted in the sub-frame of uplink corresponding to this set.When the ascending-descending subframes of Cell changes respectively flexibly, the subframe duplex directions in above-mentioned set can change between uplink and downlink, but the mapping relations of the sub-frame of uplink of above-mentioned set and feedback HARQ-ACK information are constant.For example, can select an existing LTE uplink-downlink configuration, reference uplink-downlink configuration hereinafter referred to as this Cell, guarantee that this set with reference to the descending sub frame of uplink-downlink configuration is the superset of the fixedly descending sub frame of this Cell and the set of flexible sub-frame, thereby according to the HARQ-ACK timing relationship of the descending sub frame on the identical timing position of corresponding definite this Cell of this HARQ-ACK timing relationship with reference to each descending sub frame in uplink-downlink configuration.

Fig. 2 is that the application one preferably selects the schematic flow sheet of the method for transmitting HARQ-ACK information based on channel, and the method is applied to support to change flexibly in the TDD CA system of subframe duplex directions, comprises the following steps:

Step 201:UE receives PDCCH and the PDSCH that base station sends, and wherein, comprises the information of DAI information and binding window size in PDCCH.

The Cell that distributes and can change flexibly for ascending-descending subframes, according to method above, after having determined the corresponding relation of subframe set and sub-frame of uplink, can obtain need to feeding back at a sub-frame of uplink maximum downstream subframe set of HARQ-ACK information, hereinafter referred to as reference binding window.For example, according to determine HARQ-ACK timing relationship with reference to uplink-downlink configuration, defining the corresponding descending sub frame set in reference to uplink-downlink configuration of a sub-frame of uplink is reference binding window.

In with reference to binding window, the duplex directions of flexible sub-frame likely becomes up direction, thereby will cause the descending sub frame number that is currently available for downlink transfer in reference to binding window to change, be current binding window hereinafter referred to as the descending sub frame set with reference to being currently available for downlink transfer in binding window.Because current ascending-descending subframes distribution is known in base station, so current binding window size can be known in base station when sending the transmission of PDCCH dispatching downlink, therefore, the size of above-mentioned current binding window can be indicated in base station in PDCCH, and does not need the number of the downlink transfer of scheduling to predict.

In fact, in current binding window, base station can be only a UE dispatching downlink transmission in a part of descending sub frame, if base station indicates the number of the actual descending sub frame for this UE scheduling in base station in current binding window, this UE can feed back HARQ-ACK information with optimum method.Number hereinafter referred to as the actual descending sub frame for this UE scheduling in base station is actual binding window size.In this case, the descending sub frame number of its actual schedule in current binding window need to be predicted in base station, thereby, scheduler is had to certain requirement.

According to analysis above, the Cell that distributes and can change flexibly for ascending-descending subframes, base station, when binding window size M is set, can be set to (be designated as below M with reference to binding window size _r), conventionally, the window size arranging is like this bigger than normal; Or, can be set to current binding window size and (be designated as below M _c), in the situation that not predicting, window size is so set and relatively optimizes; Or, can be set to actual binding window size and (be designated as below M _e), like this, UE can feed back HARQ-ACK information with optimum method, but scheduler is had to certain requirement.

In existing LTE version 8/9/10/11, in PDCCH, comprised DAI information, but do not comprised the information of binding window size.The method that the application indicates binding window size M in PDCCH is described below.The application does not limit base station to any binding window size of the concrete indication of UE, and the application does not limit and can only indicate with reference to binding window size M in other words _r.

The application proposes two kinds of information that preferably method is indicated binding window size M, and this information can be binding window size M itself, can be also to can be used in other information of determining binding window size M.

1) can indicate by increase new territory in PDCCH the information of binding window size M.This can be the total number of bits that increases PDCCH, can be also the existing bit in multiplexing PDCCH, for example filling bit.Here, because binding window size can be 1,2,3 or 4, so can indicate with two bits.Or, can be only with 1 bit, distinguish binding window size and equal 1 and be greater than 1 both of these case, thereby the situation that M is equaled to 1 is not likely carried out space binding according to the method for LTE version 8 but is fed back the HARQ-ACK bit of each TB.Or, can be only with 1 bit, distinguish binding window size and be less than or equal to 2 and be greater than 2 both of these cases, thereby M is less than or equal to 2 situation, due in supporting the downlink transfer pattern of two TB, the HARQ-ACK information of 4 bits of maximum demand feedback, still within the scope of channel is selected feedback capability, therefore, can not carry out space binding according to the method for LTE version 8 but feed back the HARQ-ACK bit of each TB.

2) can indicate by existing territory in multiplexing PDCCH the information of binding window size M.For example, by existing DAI in multiplexing PDCCH, come in territory joint instructions DAI information and binding window size M.Several preferably joint instructions methods are described below.

First method: distinguish M equal 1 and M be greater than 1 both of these case.

Due to be to M equal 1 and M be greater than 1 both of these case and distinguish, and in the situation that DAI value is greater than 1, M value is necessarily greater than 1, therefore, in fact, implicit M value is greater than 1 in DAI value, to be greater than at 1 o'clock, need in the situation that DAI value equals 1, further indicate M value and equal 1 and be still greater than 1.Here, due to different with reference to the span of the DAI value of different subframes in binding window, therefore, the application has proposed respectively different methods to set up to the DAI territory of the PDCCH with reference in different subframes in binding window, accordingly, its analytic method is also different, is described in detail respectively below.

The first preferred mode:

Only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the method for binding the information of window size M, and the definition of front m subframe of correspondence is applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.Suppose not exist SPS business, specifically joint instructions are as follows:

To first subframe with reference to binding window, because DAI value may be 1, with two code words indicate respectively M equal 1 and M be greater than 1 both of these case;

To second subframe with reference to binding window, DAI value can be 1 or 2, with two code words indicate respectively DAI value be 1 and M equal 1, and DAI value be 1 and M be greater than 1, with the 3rd code word indicate DAI value be 2 and M be greater than 1;

To the 3rd subframe with reference to binding window, DAI value can be 1,2 or 3, with two code words indicate respectively DAI value be 1 and M equal 1, and DAI value be 1 and M be greater than 1, with two other code word indicate respectively DAI value be 2 and M be greater than 1, and DAI value be 3 and M be greater than 1;

To the 4th subframe with reference to binding window, because the 4th subframe must be last subframe with reference to binding window, base station is understood the scheduling situation at each descending sub frame with reference in binding window completely, so DAI value be within 1 o'clock, can not occur base station scheduling more than the dynamic data of 1 descending sub frame the situation to UE, therefore, with code word indication DAI value be 1 and M equal 1, M is actual binding window size here; Other 3 code words indicate respectively DAI value be 2 and M is greater than 1, DAI value be 3 and M be greater than 1 and DAI value be 4 and M be greater than 1 these three kinds of situations.

For example, table 6 is to adopt this preferred mode joint instructions DAI information and the example of binding the information of window size M in different descending sub frames.The code word (that is: the value of MSB and LSB) in corresponding each DAI territory with reference to each subframe in binding window, by parameter to (a, b) represent DAI value and the binding window size M of its indication, parameter a represents DAI value, the situation of parameter b representative binding window size M.Here, the code word ' 00 ' in the DAI territory in the 3rd subframe is the actual binding of indication window size, does not need the type of the binding window size M of restriction indication in other situations.

Table 6

In addition, when there is SPS business, if UE does not receive the downlink data of dynamic PDCCH scheduling, UE thinks that binding window size M equals 1; Otherwise UE thinks that binding window size M is greater than 1.

The second preferred mode:

To above-mentioned table 6, if for reference binding window size M _requal 1 situation, only having subframe index is 0 the effect of showing.In this case, the dibit ' 00 ' in DAI territory represent DAI value be 1 and M be greater than 1, these are different from the DAI territory definition in existing LTE system because in existing LTE system in the situation that binding window size is 1 the dibit ' 00 ' in DAI territory be represent DAI value be 1 and M equal 1.In order to overcome this problem, the application has proposed the second preferred mode.

The difference of this mode and above-mentioned the first preferred mode is: when the joint instructions method of each descending sub frame in window is bound in definition reference, with reference to binding window size M _ras a parameter substitution.Specifically, the row that are 0 to the subframe index of above-mentioned table 6, each code word in DAI territory is indicated respectively the big or small value of binding window; The subframe index of table 6 is that 1,2 or 3 row remain unchanged.For example, suppose not exist SPS business, table 7 is to adopt this preferred mode based on reference binding window size M _rthe example of the information of joint instructions DAI information and binding window size M in different descending sub frames.Table 7 example shown guaranteed the dibit ' 00 ' in DAI territory be represent DAI value be 1 and M equal 1.Here, only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the method for binding the information of window size M, the definition of corresponding front m subframe is applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.Here, the code word ' 00 ' in the DAI territory in the 3rd subframe is the actual binding of indication window size, does not need the type of the binding window size M of restriction indication in other situations.In addition, when there is SPS business, if UE does not receive the downlink data of dynamic PDCCH scheduling, UE thinks that binding window size M equals 1; Otherwise UE thinks that binding window size M is greater than 1.

Table 7

The third preferred mode:

To reference binding window size M _requal the method that 1,2,3 or 4 situation defines respectively the information of joint instructions DAI information and binding window size M.Suppose not exist SPS business, specifically joint instructions are as follows:

To reference binding window size M _requal 4 situation, with above-mentioned the first preferably mode define the method for the information of joint instructions DAI information and binding window size M, for example, table 6.

To reference binding window size M _requal 3 situation, to first subframe with reference to binding window, because DAI value may be 1, with two code words indicate respectively M equal 1 and M be greater than 1 both of these case; To second subframe with reference to binding window, DAI value can be 1 or 2, with two code words indicate respectively DAI value be 1 and M equal 1, and DAI value be 1 and M be greater than 1, with the 3rd code word indicate DAI value be 2 and M be greater than 1; The 3rd subframe to binding window, due to reference binding window size M _requal 3, visible the 3rd subframe must be last subframe with reference to binding window, base station is understood the scheduling situation at each descending sub frame with reference in binding window completely, so DAI value be within 1 o'clock, can not occur base station scheduling more than the dynamic data of 1 descending sub frame the situation to UE, therefore, with code word indication DAI value be 1 and M equal 1, M is actual binding window size here; Another 2 code words indication DAI value be 2 and M be greater than 1, and DAI value be 3 and M be greater than 1.For example, table 8 is to adopt this preferred mode at reference binding window size M _requal at 3 o'clock, the method example of the information of joint instructions DAI information and binding window size M in different descending sub frames.Here, the code word ' 00 ' in the DAI territory in the 2nd subframe is the actual binding of indication window size, does not need the type of the binding window size M of restriction indication in other situations.

Table 8

To reference binding window size M _requal 2 situation, to first subframe with reference to binding window, because DAI value may be 1, with two code words indicate respectively M equal 1 and M be greater than 1 both of these case; To second subframe with reference to binding window, due to reference binding window size M _requal 2, visible second subframe must be last subframe with reference to binding window, base station is understood the scheduling situation at each descending sub frame with reference in binding window completely, so DAI value be within 1 o'clock, can not occur base station scheduling more than the dynamic data of 1 descending sub frame the situation to UE, therefore, with code word indication DAI value be 1 and M equal 1, M is actual binding window size here; Another code word indication DAI value be 2 and M be greater than 1.For example, table 9 is to adopt this preferred mode at reference binding window size M _requal joint instructions DAI information and the method example of binding the information of window size M in different descending sub frames at 2 o'clock.Here, the code word ' 00 ' in the DAI territory in the 1st subframe is the actual binding of indication window size, does not need the type of the binding window size M of restriction indication in other situations.

Table 9

To reference binding window size M _requal 1 situation, owing to only having a subframe with reference to binding in window, therefore with a code word indicate DAI value be 1 and M equal 1.For example, table 10 is to adopt this preferred mode at reference binding window size M _requal the method example of the information of 1 o'clock joint instructions DAI information and binding window size M.

Table 10

In addition, to reference binding window size M _requal 1,2,3 or 4 various situations, when there is SPS business, if UE does not receive the downlink data of dynamic PDCCH scheduling, UE thinks that binding window size M equals 1; Otherwise UE thinks that binding window size M is greater than 1.

Second method: the value that further indicates actual binding window size in the situation that DAI value equals 1 is 1,2,3 or 4; And the situation that DAI value is greater than to 1, M is necessarily greater than 1, but does not further distinguish M value.

Here, with reference to setting and the analytic method of binding the DAI territory of the PDCCH in different subframes in window, be different, described in detail respectively below.

The first preferred mode:

In PDCCH, directly indicate the value of binding window size M, thereby no matter bind in window whether comprise SPS business, the size of the binding window of feedback HARQ-ACK information is all M.Can be only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the method for binding the information of window size M, and the definition of front m subframe of correspondence is applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.Specifically:

To first subframe with reference to binding window, because DAI value only may indicate respectively M to equal 1,2,3 or 4 for 4 code words in 1, DAI territory;

To second subframe with reference to binding window, DAI value can be 1 or 2, since second subframe to the 4th subframe with reference to binding window, the downlink data number that base station may send is 1,2 or 3, if DAI value is 1, so, M may be 1,2,3 or 4, because may send SPS business in first subframe with reference to binding window, in DAI value, do not comprise the indication information of SPS business, therefore, need to 4 code words indicate respectively DAI value be 1 and M equal respectively 1,2,3 or 4, the five code words indication DAI values be 2 and M be greater than 1;

To the 3rd subframe with reference to binding window, DAI value can be 1,2 or 3, in the 3rd subframe and the 4th subframe, the downlink data number that base station may send is 1 or 2, if DAI value is 1, so, M may be 1,2 or 3, because may send a SPS business in the first two subframe with reference to binding window, in DAI value, do not comprise the indication information of SPS business, therefore, need to 3 code words indicate respectively DAI value be 1 and M equal respectively 1,2 or 3, another two code words indication DAI value be 2 and M be greater than 1, and DAI value be 3 and M be greater than 1;

To the 4th subframe with reference to binding window, because the 4th subframe must be last subframe with reference to binding window, can only send a downlink data, if DAI value is 1, so, M may be 1 or 2, because may send a SPS business in first three subframe with reference to binding window, in DAI value, do not comprise the indication information of SPS business, therefore, need to 2 code words indicate respectively DAI value be 1 and M equal respectively 1 or 2, other 3 code words indicate respectively DAI value be 2 and M be greater than 1, DAI value be 3 and M be greater than 1 and DAI value be 4 and M be greater than 1 these three kinds of situations.

For example, table 11 is to adopt this preferred mode joint instructions DAI information and the example of binding the information of window size M in different descending sub frames, adopts in this way, need to carry out joint instructions with 3 bits.

Table 11

The second preferred mode:

In PDCCH, comprise a numerical value M _d, M _dit is the sum of the dynamic downlink data of base station scheduling UE in reference to binding window, then according to whether comprising SPS business in binding window, calculate respectively the binding window size M for HARQ-ACK feedback, while not comprising SPS business in binding window, binding window size M equals M _d; While comprising SPS business in binding window, binding window size M equals M _d+ 1.

Can be only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the information M that binds window size M _dmethod, and the definition of front m subframe of correspondence is applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.Specifically:

To first subframe with reference to binding window, because DAI value only may be indicated respectively M for 4 code words in 1, DAI territory _dequal 1,2,3 or 4;

To second subframe with reference to binding window, DAI value can be 1 or 2, and the downlink data number that may send to the 4th the subframe base station with reference to binding window since second subframe is 1,2 or 3, and therefore, by 3 code words, indicating respectively DAI value is 1 and M _dequal respectively 1,2 or 3, another code word indication DAI value is 2 and M _dbe greater than 1;

To the 3rd subframe with reference to binding window, DAI value can be 1,2 or 3, and the downlink data number that may send in the 3rd subframe and the 4th subframe base station is 1 or 2, so indicate respectively DAI value by 2 code words, is 1 and M _dequal respectively 1 or 2, another two code words indication DAI value is 2 or 3 and M _dbe greater than 1;

To the 4th subframe with reference to binding window, because the 4th subframe must be with reference to last subframe of binding window, when being 1, DAI value can not there is M _dbe greater than 1, so be 1 and M by code word indication DAI value _dequal 1, other 3 code words indications DAI values are 2,3 and 4 and M _dbe greater than 1.

For example, table 12 is to adopt this preferred mode joint instructions DAI information and binding window size M in different descending sub frames _dthe example of information.With (2,2/3/4), for example, it represents that DAI value is 2, M _dvalue can be 2,3 or 4.

Table 12

The third preferred mode:

The difference of this mode and above-mentioned the second preferred mode is: when the joint instructions method of each descending sub frame in window is bound in definition reference, with reference to binding window size M _ras a parameter substitution.For example: table 13 is the information M that adopt this preferred mode joint instructions DAI information and binding window size M _dexample.Here, only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the information M that binds window size M _dmethod, corresponding before the definition of m subframe be applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.

Table 13

The third method: distinguish M be less than or equal to 2 and M be greater than 2 both of these cases.

Due to be to M be less than or equal to 2 and M be greater than 2 both of these cases and distinguish, and in the situation that DAI value is greater than 2, M value is necessarily greater than 2, therefore, in fact, implicit M value is greater than 2 in DAI value, to be greater than at 2 o'clock, need in the situation that DAI value equals 1 and 2, further indicate M value and be less than or equal to 2 and be still greater than 2.Here, with reference to setting and the analytic method of binding the DAI territory of the PDCCH in different subframes in window, be different.

A kind of preferably mode is only according to reference binding window size M _requal 4 situation definition joint instructions DAI information and the method for binding the information of window size M, and the definition of front m subframe of correspondence is applied to reference to binding window size M _requal the situation of m, m equals 1,2,3 or 4.Specifically:

To first subframe with reference to binding window, because DAI value may be 1, with two code words indicate respectively M be less than or equal to 2 and M be greater than 2 both of these cases;

To second subframe with reference to binding window, DAI value can be 1 or 2, with two code words indicate respectively DAI value be 1 and M be less than or equal to 2, and DAI value be 1 and M be greater than 2, with two other code word indication DAI value be 2 and M be less than or equal to 2, and DAI value be 2 and M be greater than 2;

To the 3rd subframe with reference to binding window, DAI value can be 1,2 or 3, the situation that is 1 to DAI value, owing to sending 2 downlink datas in the 3rd subframe and the 4th subframe maximum, consider in first subframe and second subframe and may send SPS business, therefore, with two code words indication DAI values be 1 and M be less than or equal to 2, and DAI value be 1 and M be greater than 2; The situation that is 2 to DAI value, need to two code words indicate DAI value be 2 and M be less than or equal to 2, and DAI value be 2 and M be greater than 2; The situation that is 3 for DAI value, with another code word indication DAI value be 3 and M be greater than 2;

To the 4th subframe with reference to binding window, because the 4th subframe must be last subframe with reference to binding window, binding window DAI value is to occur that M is greater than 2 at 1 o'clock, therefore, with code word indication DAI value be 1 and M be less than or equal to 2, and with two code words indicate respectively DAI value be 2 and M be less than or equal to 2, and DAI value be 2 and M be greater than 2; Other 2 code words indication DAI value be 3 and M be greater than 2, and DAI value be 4 and M be greater than 2.

For example, table 14 is to adopt this preferred mode joint instructions DAI information and the example of binding the information of window size M in different descending sub frames.

Table 14

Step 202:UE decodes to the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the information of DAI information and binding window size.

The information approach of having described multiple indication DAI information and binding window size in above-mentioned steps 201, accordingly, also provides the method for multiple transmitting HARQ-ACK information in this step, described in detail respectively below.

First method:

This method is applicable to distinguish M in PDCCH and equals 1 and the M situation that is greater than 1, or in PDCCH the situation of the occurrence of indication binding window size M, or, the situation of the value of the M that the situation that is 1 to DAI value is further indicated.

When M equals 1, in binding window, only have a subframe to carry out downlink transfer, the downlink transfer of this subframe is determined to a PUCCH form 1a/1b channel, then on this PUCCH form 1a/1b channel, feed back HARQ-ACK information.When UE configures single TB transmission mode, with a HARQ-ACK bit of PUCCH form 1a feedback; When UE configuration double T B transmission mode, UE does not carry out space binding but adopts PUCCH form 1b channel to feed back the HARQ-ACK bit of these two TB simultaneously.

When M is greater than 1, UE carries out space binding, each descending sub frame in binding window is obtained to a binding HARQ-ACK bit, the method for then selecting with channel feedback HARQ-ACK information.Here, can be to shine upon successively a HARQ-ACK bit with reference to each descending sub frame in binding window, the HARQ-ACK feedback information of k subframe is mapped to bit HARQ-ACK (k-1), and k equals 1,2, and 3,4; UE does not detect the corresponding filling bit DTX of subframe of downlink transfer, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, the HARQ-ACK bit that can be dynamic downlink transfer shines upon from first bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4, if there are SPS data, by HARQ-ACK bit mapping corresponding to SPS data to M _rindividual bit, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, can be by 1 bit HARQ-ACK of HARQ-ACK bit mapping to the (0) corresponding to SPS data, the HARQ-ACK bit of other dynamic downlink transfer shines upon from the 2nd bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k), k equals 1,2, and 3, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.

Second method:

The information of the binding window that this method is applicable to indicate in PDCCH is numerical value M _d, and according to M _dwhether comprise SPS business in window with binding and can calculate respectively the situation for the binding window size of HARQ-ACK feedback.

While there is not SPS business in binding window, binding window size M equals M _d.When M equals 1, in binding window, only have a subframe to carry out downlink transfer, the downlink transfer of this subframe is determined to a PUCCH form 1a/1b channel, then on this PUCCH form 1a/1b channel, feed back HARQ-ACK information.When UE configures single TB transmission mode, be with a HARQ-ACK bit of PUCCH form 1a feedback; When UE configuration double T B transmission mode, UE does not carry out space binding but adopts PUCCH form 1b channel to feed back the HARQ-ACK bit of these two TB simultaneously.When M is greater than 1, UE carries out space binding, each descending sub frame in binding window is obtained to a binding HARQ-ACK bit, the method for then selecting with channel feedback HARQ-ACK information.Here, can be to shine upon successively a HARQ-ACK bit with reference to each descending sub frame in binding window, the HARQ-ACK feedback information of k subframe is mapped to bit HARQ-ACK (k-1), and k equals 1,2, and 3,4; UE does not detect the corresponding filling bit DTX of subframe of downlink transfer, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, the HARQ-ACK bit of each dynamic downlink transfer is shone upon from first bit successively according to its corresponding DAI value order, HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4; Non-existent HARQ-ACK bit is filled with DTX; Then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.

While there is SPS business in binding window, binding window size M equals M _d+ 1.If UE does not detect dynamic downlink transfer in binding window, UE is in 1 bit HARQ-ACK information of the PUCCH form 1a of the SPS of semi-static distribution business channel feedback SPS business; If UE has detected dynamic downlink transfer in binding window, M is necessarily greater than 1, UE and carries out space binding, each descending sub frame in binding window is obtained to a binding HARQ-ACK bit, the method for then selecting with channel feedback HARQ-ACK information.Here, can be to shine upon successively a HARQ-ACK bit with reference to each descending sub frame in binding window, the HARQ-ACK feedback information of k subframe is mapped to bit HARQ-ACK (k-1), and k equals 1,2, and 3,4; UE does not detect the corresponding filling bit DTX of subframe of downlink transfer, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, the HARQ-ACK bit that can be dynamic downlink transfer shines upon from first bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4, if there are SPS data, HARQ-ACK bit mapping corresponding to SPS data to M _rindividual bit, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, can be by 1 bit HARQ-ACK of HARQ-ACK bit mapping to the (0) corresponding to SPS data, the HARQ-ACK bit of other dynamic downlink transfer shines upon from the 2nd bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k), k equals 1,2, and 3, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.

The third method:

This method is applicable to distinguish M in PDCCH and is less than or equal to 2 and the M situation that is greater than 2.

When M is less than or equal to 2, UE need to feed back at most 2 subframes HARQ-ACK information of totally 4 bits, therefore, does not need to carry out space binding, and UE can feed back all HARQ-ACK bits.For example, can according to corresponding DAI value order, from first bit, shine upon successively according to the HARQ-ACK bit of each downlink transfer, if there is SPS business, HARQ-ACK bit mapping corresponding to SPS business arrives last bit, then, when configuring single TB transmission mode, UE selects mapping form feedback HARQ-ACK information with the channel of 2 bits; When UE configuration double T B transmission mode, with the channel of 4 bits, select mapping form feedback HARQ-ACK information.Or, if there is SPS business, HARQ-ACK bit mapping corresponding to SPS business arrives first bit, then according to the HARQ-ACK bit of each downlink transfer, according to corresponding DAI value order, shine upon successively, when UE configures single TB transmission mode, with the channel of 2 bits, select mapping form feedback HARQ-ACK information; When UE configuration double T B transmission mode, with the channel of 4 bits, select mapping form feedback HARQ-ACK information.

When M is greater than 2, UE carries out space binding, each descending sub frame in binding window is obtained to a binding HARQ-ACK bit, the method for then selecting with channel feedback HARQ-ACK information.Here, can be to shine upon successively a HARQ-ACK bit with reference to each descending sub frame in binding window, the HARQ-ACK feedback information of k subframe is mapped to bit HARQ-ACK (k-1), and k equals 1,2, and 3,4; UE does not detect the corresponding filling bit DTX of subframe of downlink transfer, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, the HARQ-ACK bit that can be dynamic downlink transfer shines upon from first bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4, if there are SPS data, by HARQ-ACK bit mapping corresponding to SPS data to M _rindividual bit, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.Or, can be by 1 bit HARQ-ACK of HARQ-ACK bit mapping to the (0) corresponding to SPS data, the HARQ-ACK bit of other dynamic downlink transfer shines upon from the 2nd bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k), k equals 1,2, and 3, non-existent HARQ-ACK bit is filled with DTX, then according to reference binding window size M _rdetermine channel selection mapping table, thereby select feedback HARQ-ACK information based on channel.

Fig. 3 be the application another preferably based on channel, select the schematic flow sheet of the method for transmitting HARQ-ACK information.The method is applied to support to change flexibly in the TDD CA system of subframe duplex directions, comprises the following steps:

Step 301:UE receives PDCCH and the PDSCH that base station sends, and wherein, comprises DAI information in PDCCH.

The Cell that distributes and can change flexibly for ascending-descending subframes, according to method above, after having determined the mapping relations of descending sub frame set and sub-frame of uplink, can obtain need to feeding back at a sub-frame of uplink maximum downstream subframe set of HARQ-ACK information, hereinafter referred to as reference binding window.For example, according to determining timing relationship with reference to uplink-downlink configuration, defining the corresponding descending sub frame set in reference to uplink-downlink configuration of a sub-frame of uplink is reference binding window.

UE detects PDCCH and corresponding PDSCH on each the possible descending sub frame with reference in binding window.Here, suppose that the method to set up in the DAI territory that comprises in PDCCH is still used the method defining in Rel-8, the value of DAI is the counting with reference to the PDCCH of the dispatching downlink transmission sending by the end of base station, current descending sub frame position in binding window.

Step 302:UE decodes to the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the DAI information information relevant with SPS.

UE can be according to reference binding window size M _rdetermine channel selection mapping form, thus the method feedback HARQ-ACK information that adopts channel to select.

Work as M _requal at 1 o'clock, in reference to binding window, only have a subframe to carry out downlink transfer, the downlink transfer of this subframe is determined to a PUCCH form 1a/1b channel, then on this PUCCH form 1a/1b channel, feed back HARQ-ACK information.When UE configures single TB transmission mode, with a HARQ-ACK bit of PUCCH form 1a feedback; When UE configuration double T B transmission mode, UE does not carry out space binding but adopts PUCCH form 1b channel to feed back the HARQ-ACK bit of these two TB simultaneously.

Work as M _rbe greater than at 1 o'clock, UE carries out space binding, each descending sub frame with reference in binding window is obtained to a binding HARQ-ACK bit; Then, UE shines upon the binding HARQ-ACK information of each dynamic downlink transfer from first bit successively according to its corresponding DAI value order, and HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4; If there is SPS business, HARQ-ACK bit mapping corresponding to SPS business is to M _rindividual bit; Then, UE is based on M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping form to select with channel.Or, work as M _rbe greater than at 1 o'clock, UE carries out space binding, each descending sub frame in binding window is obtained to a binding HARQ-ACK bit; If there is SPS business, HARQ-ACK bit mapping corresponding to SPS business arrives first bit HARQ-ACK (0), then according to the HARQ-ACK bit of each dynamic downlink transfer, according to corresponding DAI value order, since the 2nd bit, shine upon successively, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k), k equals 1,2,3; If there is no SPS business, UE shines upon the binding HARQ-ACK information of each dynamic downlink transfer from first bit successively according to its corresponding DAI value order, be that HARQ-ACK feedback information corresponding to downlink transfer that DAI equals k is mapped to bit HARQ-ACK (k-1), k equals 1,2,3,4; Then, UE is based on M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping form to select with channel.

4 bit channels that adopt in LTE version 10 as table 3 are selected to mapping form, although do not distinguish in the ordinary course of things NACK and DTX in order to reduce feedback overhead, but there is a situation for exception to be: when 4 bits are all NACK or DTX, can and can only further distinguish NACK and DTX to first bit HARQ-ACK (0) to first bit HARQ-ACK (0).The method that adopts the application to provide, guarantee that first bit HARQ-ACK (0) must be for carrying a feedback information that need to feed back the descending sub frame of HARQ-ACK information, thereby can feed back as much as possible the HARQ-ACK information of each descending sub frame in binding window.

Below by two examples, describe.

As shown in Figure 4, suppose that base station work at present is in uplink-downlink configuration 0, and the HARQ-ACK timing relationship of PDSCH is determined according to uplink-downlink configuration 2, with reference to uplink-downlink configuration, is uplink-downlink configuration 2.According to reference to uplink-downlink configuration 2, in the reference binding window corresponding to sub-frame of uplink 7, comprise subframe 9,0,1 and 3.When base station real work is during in uplink-downlink configuration 0, with reference to only having subframe 0 and 1 in binding window, be descending sub frame, and first subframe of binding window is that subframe 9 is current for uplink.

Example one adopts prior art, is mapped to successively HARQ-ACK bit HARQ-ACK (0) ~ HARQ-ACK (3), and is that subframe 9 is mapped to HARQ-ACK (0), i.e. b0 in figure with reference to each descending sub frame in binding window.Because current base station works in uplink-downlink configuration 0, subframe 9, for uplink, this means that UE can not be used b0 to feed back useful HARQ-ACK information.

Example two adopts method shown in Fig. 3, with reference to the binding HARQ-ACK information of binding the dynamic downlink transfer of each descending sub frame in window, according to the order of its corresponding DAI value, is mapped to successively b0 ~ b3.Here, DAI equals 1 downlink transfer and corresponds to b0.According to table 3, can to b0, further distinguish the information of NACK and DTX, that is to say, the HARQ-ACK information that can equal 1 downlink transfer to DAI is further distinguished NACK and DTX two states, thereby increases as far as possible the amount of information of feedback HARQ-ACK.

As seen from Figure 4, adopt the application can improve the performance of feedback HARQ-ACK information.

Fig. 5 is the composition structural representation of the application's one better subscriber equipment.Referring to Fig. 5, this subscriber equipment comprises: receiver module 510 and feedback module 520, wherein:

Receiver module 510, the PDCCH and the PDSCH that for receiving base station, send, wherein, comprise the information of DAI information and binding window size in PDCCH;

Feedback module 520, for according to the decoded result of the PDSCH in binding window, generates corresponding HARQ-ACK information, and the method for selecting according to the information employing channel of DAI information and binding window size is to base station feedback HARQ-ACK information.

In another kind of better embodiment, receiver module 510, the PDCCH and the PDSCH that for receiving base station, send, wherein, comprise DAI information in PDCCH;

Feedback module 520, for according to the decoded result of the PDSCH in binding window, generates corresponding HARQ-ACK information, and adopts the method for channel selection to base station feedback HARQ-ACK information according to the DAI information information relevant with SPS.

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

1. a method for transmitting HARQ-ACK information, is characterized in that, comprises the following steps:

2. the method for claim 1, is characterized in that:

The value M of indication binding window size in PDCCH.

3. the method for claim 1, is characterized in that:

In PDCCH, the value M of indication binding window size equals 1 or be greater than 1.

4. the method for claim 1, is characterized in that:

The situation that in PDCCH, DAI value is equaled to 1, the value M of indication binding window size.

5. the method for claim 1, is characterized in that:

In PDCCH, the value M of indication binding window size is less than or equal to 2 or be greater than 2.

6. the method as described in claim 1 to 5 any one, is characterized in that:

The information of described binding window size is: at a sub-frame of uplink, need to feed back the number of sub-frames in the maximum downstream subframe set of HARQ-ACK information, or in the set of described maximum downstream subframe, be currently available for the number of sub-frames in the descending sub frame set of downlink transfer, or in the set of described maximum downstream subframe base station century be the number of the downlink transfer of UE scheduling.

7. the method as described in claim 2 to 5 any one, is characterized in that:

By the neofield increasing, indicate the information of described binding window size in PDCCH.

8. the method as described in claim 3 to 5 any one, is characterized in that:

By the DAI territory in multiplexing PDCCH, indicate the information of described binding window size.

9. the method as described in claim 2 to 4 any one, is characterized in that:

When M equals 1, UE does not carry out space binding to HARQ-ACK information, adopts PUCCH form 1a/1b channel feedback HARQ-ACK information; When M is greater than 1, UE is to the binding of HARQ-ACK information and executing space, and the method feedback HARQ-ACK information of selecting mapping table to adopt channel to select according to the channel of MR bit; Wherein, MR is with reference to binding window size.

10. the method as described in claim 2 or 5, is characterized in that:

When M is less than or equal to 2, UE, to the binding of HARQ-ACK information and executing space, does not feed back all HARQ-ACK bits; When M is greater than 2, UE binds HARQ-ACK information and executing space, and according to M _rthe method feedback HARQ-ACK information that the channel of bit selects mapping table to adopt channel to select; Wherein, M _rfor reference binding window size.

The method of 11. 1 kinds of transmitting HARQ-ACK information, is characterized in that, comprises the following steps:

12. methods as claimed in claim 11, is characterized in that, the described method according to DAI information and the selection of other information employing channel comprises to base station feedback HARQ-ACK information:

13. methods as claimed in claim 11, is characterized in that, the described method according to DAI information and the selection of other information employing channel comprises to base station feedback HARQ-ACK information:

14. 1 kinds of subscriber equipmenies, is characterized in that, comprising:

15. 1 kinds of subscriber equipmenies, is characterized in that, comprising: