CN101674164A - Method for feeding back ACK/NACK information - Google Patents
Method for feeding back ACK/NACK information Download PDFInfo
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- CN101674164A CN101674164A CN200810173138A CN200810173138A CN101674164A CN 101674164 A CN101674164 A CN 101674164A CN 200810173138 A CN200810173138 A CN 200810173138A CN 200810173138 A CN200810173138 A CN 200810173138A CN 101674164 A CN101674164 A CN 101674164A
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Abstract
The invention relates to a method for feeding back ACK/NACK information. The method comprises the following steps that: when user equipment (UE) correctly receives the data of a first downlink subframe sent by a base station and the ACK/NACK feedback information on other subframes is NACK or DTX, the UE sends the ACK/NACK feedback information on the first subframe, and indicates at the same time that the ACK/NACK feedback information on other subframes is NACK or DTX and records the information as a first mode; and when the UE dost not correctly receive the data of the first downlink subframesent by the base station or the ACK/NACK feedback information on other subframes is ACK, the UE selects a used ACK/NACK channel from a plurality of ACK/NACK channels on the basis of QPSK modulation totransmit the ACK/NACK information on a plurality of downlink subframes and records the information as a second mode. The method utilizes a mechanism for detecting missed data transmission to supporta multi-bit feedback method of ACK/NACK information on multiple subframes, and can be converted into a feedback method for feeding back the ACK/NACK information on a single subframe without confusion.
Description
Technical field
The present invention relates to wireless communication system, relate to the method for the feeding back ACK/nack message in wireless communication system in particular.
Background technology
3GPP standardization body is carrying out the formulation of new generation of wireless communication standard, and this standard is called LTE.The LTE system comprises two types frame structure, and the frame structure Class1 adopts Frequency Division Duplexing (FDD) (FDD), and frame structure type 2 adopts time division duplex (TDD).
Fig. 3 is the frame structure of LTE TDD system.Each length is 307200 * T
sIt is 153600 * T that the radio frames of=10ms is divided into two length
sThe field of=5ms.It is 15360T that each field comprises 8 length
sThe time slot of=0.5ms and 3 special domain, i.e. descending pilot frequency time slot (DwPTS), protection be (GP) and uplink pilot time slot (UpPTS) at interval, the length of these 3 special domain be 30720T
s=1ms.Each subframe is made of two continuous time slot, and promptly k subframe comprises time slot 2k and time slot 2k+1.Subframe 1 and subframe 6 comprise 3 above-mentioned special domain.
In the LTE system, support based on mixing automatic repeat requests (HARQ) transmitting downlink data.(PDCCH) dispatches dynamic downlink transfer by Physical Downlink Control Channel, and each PDCCH can comprise 1,2,4 or 8 control channel unit (CCE).Each CCE shines upon one and confirms/deny (ACK/NACK) channel.To the downlink data transmission of dynamic dispatching, its ACK/NACK channel is impliedly determined by the CCE of index minimum among the CCE that forms PDCCH; To the downlink data transmission of semi-persistent scheduling, the configuration that its ACK/NACK channel shows by high-level signaling.When the PDCCH in the descending subframe comprised a plurality of CCE, these a plurality of CCE can shine upon a plurality of ACK/NACK channels, but present regulation makes the ACK/NACK channel feedback ACK/NACK information of the CCE correspondence of index of reference minimum.
In the LTE system, the feedback method of multiple ACK/NACK information is arranged.
First kind of feedback method is the ACK/NACK feedback information that only transmits a descending sub frame in a sub-frame of uplink.It is applicable to FDD, also is applicable to the situation of the descending sub frame number of TDD smaller or equal to the sub-frame of uplink number.When not adopting MIMO to send data, generate 1 bit ACK/nack message, thereby on the ACK/NACK channel, send, be i.e. PUCCH form 1a with the BSPK modulation system; When adopting MIMO to send data, generate 2 bit ACK/nack message, thereby on the ACK/NACK channel, send, be i.e. PUCCH form 1b with the QSPK modulation system.
Second kind of feedback method is that the ACK/NACK feedback information of a plurality of descending sub frames is bound 1 or 2 bits, thereby the method for BPSK/QPSK that can multiplexing first kind of feedback method sends.It is applicable to the situation of the descending sub frame number of TDD system more than the sub-frame of uplink number.The bindings here is to be operated on the code word (codeword), promptly each ACK/NACK information that has sent the identical code word of the index of descending sub frame of data is bound an ACK/NACK information.Here, be ACK/NACK information binding with first code word of the subframe that has adopted MIMO to the ACK/NACK information of the subframe that do not adopt MIMO.Bindings is when all the ACK/NACK information that will bind all are ACK, output ACK; When the ACK/NACK of at least one subframe information is NACK, output NACK; When subscriber equipment has been found to have lost the data of certain descending sub frame by the mechanism that detects the obliterated data transmission, output DTX.
The third feedback method is to send the ACK/NACK feedback information of a plurality of descending sub frames in a sub-frame of uplink, and is the ACK/NACK information that sends many bits, and in the LTE system, this bit number is 2,3 and 4.It is applicable to the situation of the descending sub frame number of TDD system more than the sub-frame of uplink number.
Fig. 4 is the method for a plurality of bit ACK/nack messages of generation of above-mentioned the third feedback method among the LTE.Here the ACK/NACK information of supposing 4 descending sub frames is transmitted in same sub-frame of uplink.As shown in Figure 4, the transfer of data of each descending sub frame produces an ACK/NACK information, and this information can be ACK, perhaps NACK, perhaps DTX.Here, to there not being the descending sub frame of transfer of data, but perhaps the base station has sent the descending sub frame that the data subscriber equipment is not received these data, and the feedback information of generation is DTX, does not promptly send signal on the ACK/NACK channel; When not adopting MIMO, directly obtain the ACK or the nack message of a subframe; When adopting MIMO, the ACK/NACK information of two code words in the subframe handled obtaining the ACK or the nack message that will send.The processing method here is when 2 ACK/NACK information all are ACK, to obtain ACK; When having 1 NACK in 2 bit ACK/nack message at least, obtain NACK.
The method that sends the ACK/NACK information of a plurality of bits in the third feedback method is based on the ACK/NACK channel of QPSK modulation and selection use in a plurality of ACK/NACK channels.Specifically, (N equals 2 to note N, 3 or 4) the ACK/NACK feedback information of individual descending sub frame need transmit in a sub-frame of uplink, then when being that a subscriber equipment is when having sent data in N descending sub frame, each subframe all has the ACK/NACK channel of a correspondence, like this, subscriber equipment can be selected one and come transmission information from N ACK/NACK channel, and on each ACK/NACK channel, based on the QPSK modulator approach, can there be 4 QPSK constellation point like this, to indicate 4N state at most for selecting for use, state is represented one two tuple (ACK/NACK channel, QPSK constellation point).Also having a state is DTX, promptly subscriber equipment what do not send.The some or all of ACK/NACK information that can be used for transmitting N descending sub frame in this 4N+1 state.
To above-mentioned first kind of feedback method, when feedback 1 bit ACK/nack message, can distinguish three kinds of states of ACK, NACK and DTX; When feedback 2 bit ACK/nack message, can distinguish (ACK, ACK), (NACK, ACK), (ACK, NACK), (NACK, NACK) and five kinds of states of DTX.Because can distinguish NACK and DTX, thus when transmitting, can use HARQ based on the method that increases redundant (IR), thus improve transmission performance.Above-mentioned second kind of feedback method is simple, can guarantee up covering to greatest extent, and its benefit is when the base station has only sent data to subscriber equipment in a descending sub frame, second kind of feedback method is equivalent to first kind of feedback method, that is to say and have the ability of distinguishing NACK and DTX, when the base station only when a descending sub frame sends data, guaranteed the performance of transfer of data.But above-mentioned the third feedback method can not revert to first kind of feedback method, promptly when the base station only when a descending sub frame sends data, can not distinguish NACK and DTX, thereby need not use the HARQ method of IR, be unfavorable for improving the performance of transfer of data.The present invention improves above-mentioned the third feedback method, thus when the base station only when a descending sub frame sends data, make the third feedback method revert to first kind of feedback method.
In the LTE system, comprise a territory among the PDCCH, be used to refer in N descending sub frame of a sub-frame of uplink correspondence, sent PDCCH in what descending sub frames of base station before current descending sub frame, this territory is called descending distribution indication (DAI).DAI comprises 2 bits, can indicate 4 values, and its variation is 1,2,3,4 in proper order.For example subscriber equipment is received two PDCCH, and their DAI is respectively 1 and 3, and then subscriber equipment can be judged it to have lost a DAI be 2 PDCCH.In addition, DAI can not detect the situation of having lost last several PDCCH.Although defined the DAI that transmits among the LTE in PDCCH, the third top feedback method does not use this DAI information, so can utilize DAI information further to improve the method for above-mentioned the third feedback method.
Summary of the invention
The method that the purpose of this invention is to provide a kind of feeding back ACK/nack message in wireless communication system.
According to an aspect of of the present present invention, a kind of method of feeding back ACK/nack message comprises step:
Correctly receive the data of first descending sub frame of base station transmission when subscriber equipment, and when other subframes ACK/NACK feedback information is NACK or DTX, subscriber equipment sends the ACK/NACK feedback information of first subframe, the ACK/NACK feedback information that indicates other subframes simultaneously is NACK or DTX, is designated as first pattern;
If subscriber equipment does not correctly receive the data of first descending sub frame of base station transmission, perhaps other subframes ACK/NACK feedback information is ACK, subscriber equipment is based on the ACK/NACK channel of QPSK modulation and selection use in a plurality of ACK/NACK channels, transmit the ACK/NACK information of a plurality of descending sub frames, be designated as second pattern.
According to another aspect of the present invention, a kind of method that receives ACK/NACK information comprises step:
To a subscriber equipment, the base station for this subscriber equipment has sent each descending sub frames of data, is detected each possible state two tuples according to reality.
Judge that when the base station state two tuples that subscriber equipment sends are when belonging to first pattern of claim 1, the base station obtains its ACK/NACK feedback information that sends first subframe of data, and obtains the ACK/NACK feedback information that other send the subframe of data.
Judge that when the base station state two tuples that subscriber equipment sends are when belonging to second pattern of claim 1, according to second pattern, the base station obtains the ACK/NACK feedback information of each subframe that has sent data.
Adopt method of the present invention, utilized the mechanism that detects the obliterated data transmission, be supported in the feedback method of many bits of the ACK/NACK information of many subframes, and the feedback method of the ACK/NACK information that is converted to a feedback subframe that can not obscure.
Description of drawings
Fig. 1 is the method for subscriber equipment feeding back ACK/nack message;
Fig. 2 is the method that the base station receives the ACK/NACK feedback information;
Fig. 3 is the frame structure of LTE TDD;
Fig. 4 is the method that produces maximum 4 bit ACK/nack message.
Embodiment
Suppose to need to send in the sub-frame of uplink ACK/NACK feedback information of N descending sub frame, and the index of each subframe is 0,1 ... N-1.Suppose to adopt certain mechanism, subscriber equipment can completely or partially be judged it and whether lose the interior dynamic data transmission of certain descending sub frame, for example the DAI technology in the LTE system.In the description to the inventive method, the various feedback informations of N subframe are divided into two classes below, and with different feedback methods, for convenience, the method that the present invention handles this two classes feedback information is called first pattern and second pattern.
In the present invention, descending sub frame is to be defined on certain bandwidth and the downlink physical resource on certain time period.Like this, N descending sub frame can be meant N the downlink physical resource that N the time period on certain fixed-bandwidth formed; N descending sub frame also can be meant N the downlink physical resource that N bandwidth on certain set time section formed; N descending sub frame also can be meant m time period and n N=mn the downlink physical resource that bandwidth is formed.
In first pattern, subscriber equipment is judged it and has been received that the base station sends to its interior data of first descending sub frame, and the index of remembering this subframe is k, and then subscriber equipment sends the ACK/NACK information of transfer of data in the subframe k; Simultaneously, the implicit feedback information that indicates other subframes.
In first pattern, can not limit the bit number of the ACK/NACK in first subframe that the base station sends data.To the transfer of data of subframe k, can determine the bit number of the ACK/NACK of feedback according to the code word number among the subframe k, for example, when subframe k does not adopt MIMO, be 1 bit ACK/nack message; When subframe k adopts MIMO, be 2 bit ACK/nack message; Also can be the ACK/NACK information of 1 bit of the fixing feedback of subframe k, for example, when all code words in the subframe k all correctly received, feeding back ACK fed back NACK under other situations.
Perhaps, in first pattern, can further limit and adopt many code words MIMO in first subframe of having only the base station to send data, when promptly needing to feed back a plurality of bit ACK/nack message, just use first mode treatment.And the base station sends first subframe of data and only need feed back the situation of a bit ACK/NACK and handle in second pattern.
In first pattern, can not distinguish dynamic data transmission and semi-static data transmission, first subframe of base station transmission data is meant first subframe for subscriber equipment transmission data according to time sequencing, this subframe can be first subframe that the base station sends dynamic data, also can be a subframe that sends semi-static data.
Perhaps, in first pattern, first subframe that can the regulation base station sends data is meant that the base station sends first subframe of dynamic data.At this moment, below two kinds of situations in second pattern, handle, promptly the base station has only sent the situation of semi-static downlink data; Though perhaps the base station has sent dynamic downlink data and semi-static downlink data simultaneously, subscriber equipment does not detect the situation of dynamic dispatching control channel, and at this moment, at subscriber equipment, current have only semi-static downlink data transmission.
In first pattern, to the feedback information of implicit other subframes of indicating, the feedback information that can be other subframes all is DTX, and perhaps the feedback information of other subframes is NACK or DTX.The DTX here comprises two kinds of possible implications, promptly can be that the base station does not send data for subscriber equipment in certain subframe; Also can be the base station in certain subframe for subscriber equipment has sent data, but subscriber equipment is not received these data.
In first pattern, on the ACK/NACK channel of descending sub frame k correspondence, can adopt BPSK or QPSK modulation system to send 1 bit or 2 bit ACK/nack message.
In second pattern, handle the transfer of data situation that does not have processing in first pattern.Here, can in each descending sub frame, handle 1 the ACK/NACK/DTX information that obtains, then, based on QPSK modulation and the ACK/NACK channel that uses in the selection of a plurality of ACK/NACK channels of the descending sub frame correspondence that has sent data, thereby send the various combination of the ACK/NACK/DTX information of each descending sub frame.For example, in second pattern, in order to compress the feedback information that needs indication, can not distinguish NACK and DTX, like this, can distinguish ACK and NACK/DTX with 1 bit information, the present invention does not limit the method for the concrete feedback information in second pattern.
Here, definition status is one two tuple (ACK/NACK channel, a QPSK constellation point), and it is used to indicate sub-frame of uplink need send a kind of combination of the ACK/NACK/DTX feedback information of N descending sub frame.In first pattern, the ACK/NACK channel in state two tuples is fixed as the ACK/NACK channel of descending sub frame k correspondence, and it is variable having only the QPSK constellation point, distinguishes the ACK/NACK information of 2 bits by these 4 QPSK constellation point; Here, when only needing feedback 1 bit ACK/nack message, only use 2 QPSK constellation point, promptly be actually the BPSK modulation.In second pattern, a plurality of possible ACK/NACK channels can be arranged, 4 QPSK constellation point are arranged in each ACK/NACK channel, like this, transmit the ACK/NACK/DTX information of each descending sub frame by different states two tuples.
The method of subscriber equipment feeding back ACK/nack message of the present invention is as shown in Figure 1:
101: subscriber equipment receives high-level signaling and obtains the ACK/NACK channel that comprises the downlink data transmission of semi-static configuration and take in which descending sub frame; On the other hand, subscriber equipment is by receiving the ACK/NACK channel that dynamic dispatching control signaling obtains the downlink data transmission of dynamic dispatching and takies.To dynamic downlink data transmission, subscriber equipment might not received the dynamic dispatching control signaling and the data of one or more descending sub frame, but detect the mechanism of obliterated data transmission by certain, subscriber equipment can be judged or partly judge it fully and whether lose the interior data of several downlink subframe, for example, the DAI technology that adopts in the LTE system.The present invention does not limit the concrete grammar of this testing mechanism.
102: subscriber equipment judges whether it receives that the base station sends to the data of its first descending sub frame, and the base station sends to the ACK/NACK feedback information of its other descending sub frames, and correspondingly selects different patterns to come feeding back ACK/nack message.
103: judge it when subscriber equipment and received that the base station sends to the data of its first descending sub frame, and the base station sends to feedback information in its other descending sub frames when satisfying requiring of first pattern, and subscriber equipment adopts first pattern feeding back ACK/nack message.Here, can limit the ACK/NACK information that first descending sub frame need feed back a plurality of bits, first subframe that also can limit base station transmission data is meant that the base station sends first subframe of dynamic data.The note base station is that the index of first descending sub frame of subscriber equipment transmission data is k, and subscriber equipment sends the ACK/NACK information of transfer of data in the subframe k, the implicit simultaneously ACK/NACK feedback information that indicates other subframes.
104: to the combination of other feedback informations beyond first pattern, subscriber equipment adopts second pattern to feed back the ACK/NACK information of these descending sub frames.Promptly by different states two tuples,, transmit the ACK/NACK information of a plurality of descending sub frames promptly based on QPSK modulation and the ACK/NACK channel that uses in the selection of the ACK/NACK channel of a plurality of descending sub frame correspondences that sent data.
The method that base station of the present invention receives ACK/NACK information is as shown in Figure 2:
201: according to high-level signaling, the base station sends the downlink data of semi-static configuration, and obtains the ACK/NACK channel of semi-static configuration; On the other hand, the base station sends the downlink data of dynamic dispatching control signaling and dynamic dispatching, and obtains corresponding ACK/NACK channel.
202: to a subscriber equipment, the base station for this subscriber equipment has sent each descending sub frames of data, is detected each possible state two tuples according to reality.That is, according to first pattern, each state two tuples for the ACK/NACK channel of first descending sub frame correspondence of subscriber equipment transmission data are detected in the base station; And according to second pattern, each is detected in the base station may state two tuples.
203: what the subscriber equipment transmission was judged in the base station is those state two tuples, and correspondingly goes out the ACK/NACK feedback information according to first pattern or second interpretation of scheme.
204: judge that when the base station state two tuples that subscriber equipment sends are when belonging to first pattern, the base station obtains its ACK/NACK feedback information that sends first subframe of data, and the implicit ACK/NACK feedback information that obtains the subframe of other transmission data.
205: judge that when the base station state two tuples that subscriber equipment sends are when belonging to second pattern, according to second pattern, the base station obtains the ACK/NACK feedback information of each subframe that has sent data.
Embodiment
This part has provided four embodiment of this invention, and is too tediously long for fear of the description that makes this patent, in the following description, omitted the detailed description of function that the public is known or device etc.
Embodiment one:
First pattern is used to handle following transfer of data situation: subscriber equipment is judged it and has been received that the base station sends to its interior data of first descending sub frame, the index of remembering this subframe is k, but in the k+1～N-1 descending sub frame, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data; Though perhaps but subscriber equipment has been received the data decoding error that the base station sends.Specifically be divided into three kinds of following situations.First kind of situation is that the base station only is subscriber equipment transmission data in a descending sub frame, and subscriber equipment has been received this piece of data.Second kind of situation is that the base station is that subscriber equipment sends data in a plurality of descending sub frames, and subscriber equipment received that the base station sends to the data in its first descending sub frame, and does not all receive for the data of its transmission in other descending sub frames the base station.The third situation is that the base station sends data for subscriber equipment in a plurality of descending sub frames, and subscriber equipment has received that the base station sends to the data in its first descending sub frame, and is NACK or DTX in the base station for the feedback information of other descending sub frames of the data of its transmission and has a NACK at least.
Like this, in first pattern, subscriber equipment sends 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates the 0th～k-1 descending sub frame is DTX, and the DTX here is that to represent the base station be subscriber equipment transmission data; The implicit simultaneously feedback information that indicates the k+1～N-1 descending sub frame is DTX or NACK, and the DTX here is that to represent the base station be not subscriber equipment transmission data, but perhaps the base station is that subscriber equipment has sent the data subscriber equipment and do not receive these data.
The transfer of data situation that does not have processing in second mode treatment, first pattern.Be that subscriber equipment is judged the base station sent data for it in a plurality of descending sub frames, but or it does not receive that the base station sends to the data in its first descending sub frame, perhaps the base station for second descending sub frame of its transmission data and follow-up descending sub frame at least one feedback information be ACK.In fact attention: DTX has represented two possible implications, to the transfer of data of a descending sub frame, when one of them implication has been handled, then only handles another implication in second pattern in first pattern.
The method of the ACK/NACK information of the actual expression of definition status two tuples in two kinds of patterns is below described.The note subscriber equipment judges that the base station is k for the index that it sends first subframe of data, and corresponding ACK/NACK channel is h
k, and the constellation point of note QPSK modulation is Q
i, i=1,2,3,4.Thereby in first pattern, when representing 2 bit ACK/nack message, use 4 state two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4); When representing 1 bit ACK/nack message, use 2 state two tuple (h
k, Q
1) and (h
k, Q
4).
For fear of obscuring between the state, the ACK/NACK channel h that in first pattern, has used
kState two tuples of forming can not be used for the ACK/NACK information below the expression of second pattern, promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK or NACK, and has at least one to be ACK in the feedback information of the k+1～N-1 descending sub frame.But, be not k if subscriber equipment is judged the base station for index that it sends first subframe of data, and subscriber equipment receives data in subframe k, then ACK/NACK channel h
kOne of four states two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4) can in second pattern, use.
When k equals 0, in first pattern, handled the data that subscriber equipment is received the 0th descending sub frame, and the feedback information of the 2nd～N-1 is NACK or DTX, so in second pattern, do not need this feedback information combination of reprocessing.
When k greater than 0 the time, in first pattern, handle the 0th～k-1 subframe base station not to its transmission data, subscriber equipment has not been received the data among the subframe k, and the feedback information of the k+1～N-1 subframe is NACK or DTX.In second pattern, do not need this feedback information combination of reprocessing, but the combination of the feedback information below in second pattern, needing to handle: sent data at least one subframe in the 0th～k-1 subframe of base station, and feedback information is NACK or DTX, the feedback information of k subframe is ACK, and the feedback information of the k+1～N-1 subframe is NACK or DTX.
The mapping method of the state that is combined to two tuples of each ACK/NACK information when N equals 2,3 and 4 is described below, notices that these forms are some examples, the present invention does not limit concrete mapping method.For convenience, represent that with different forms feedback information is to the mapping relations of state two tuples in first pattern and second pattern respectively here.In fact, the form of two kinds of patterns also can comprehensively be a form that comprises all feedback informations to the mapping relations of state two tuples.
Judge it when subscriber equipment and received that the base station sends to the data in its first descending sub frame, the index of remembering this subframe is k, and in the k+1～N-1 descending sub frame, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data; Though perhaps but subscriber equipment has been received the data decoding error that the base station sends.At this moment adopt first pattern to send 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates the k+1～N-1 descending sub frame is DTX or NAGK.
Table 1 is the method for a kind of mapping 2 bit ACK/nack message and state two tuples.For example, when the transfer of data in the subframe has adopted MIMO, can be by table 1 mapping 2 bit ACK/nack message.Table 2 is methods of a kind of mapping 1 bit ACK/nack message and state two tuples, and it can regard a subclass of table 1 as.For example, when the transfer of data in the subframe had not adopted MIMO, perhaps the transfer of data in the subframe is fixing handled when obtaining 1 ACK/NACK information, can be by table 2 mapping 1 bit A GK/NACK information.Here, the note base station is that the interior index of first descending sub frame of subscriber equipment transmission data is k, and the ACK/NAGK channel of subframe k correspondence is h
k, the constellation point of QPSK modulation is Q
i, i=1,2,3,4, the BPSK modulation is the constellation point (Q with two QPSK modulation
1And Q
4) expression.
Table 1: the QPSK modulator approach of first pattern
| 2 bit ACK/nack message | The ACK/NACK channel | The QPSK constellation point |
| ??NACK，NACK | ??h k | ??Q 1 |
| ??NACK，ACK | ??h k | ??Q 2 |
| ??ACK，NACK | ??h k | ??Q 3 |
| ??ACK，ACK | ??h k | ??Q 4 |
Table 2: the BSPK modulator approach of first pattern
| 1 bit ACK/nack message | The ACK/NACK channel | The QPSK constellation point |
| ??NACK | ??h k | ??Q 1 |
| ??ACK | ??h k | ??Q 4 |
When N equaled 2, table 3 was that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.Table 3 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 3:N equals a kind of mapping method of 2: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2) | The ACK/NACK channel | The QPSK constellation point |
| ??ACK，ACK | ??h 2 | ??Q 4 |
| ??NACK/DTX，ACK | ??h 2 | ??Q 1 |
| ??DTX，NACK | ??h 2 | ??Q 2 |
| ??DTX，DTX | ??N/A | ??N/A |
When N equaled 3, table 4 was that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.Table 4 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 4:N equals a kind of mapping method of 3: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2)，HARQ-ACK(3) | The ACK/NACK channel | The QPSK constellation point |
| ??ACK，ACK，ACK | ??h 2 | ??Q 4 |
| ??ACK，ACK，NACK/DTX | ??h 2 | ??Q 3 |
| ??ACK，NACK/DTX，ACK | ??h 3 | ??Q 4 |
| ??NACK/DTX，ACK，ACK | ??h 3 | ??Q 3 |
| ??NACK/DTX，ACK，NACK/DTX | ??h 2 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，ACK | ??h 3 | ??Q 2 |
| ??DTX，DTX，NACK | ??h 3 | ??Q 1 |
| ??DTX，NACK，NACK/DTX | ??h 2 | ??Q 1 |
| ??DTX，DTX，DTX | ??N/A | ??N/A |
When N equaled 4, except that DTX, one had 16 possible state two tuples.Because the combination of the feedback information that need represent is many, need the state that uses in reasonable distribution first pattern and second pattern.
A kind of possible distribution method is described below,, has increased the number of upstate two tuples in second pattern promptly by having increased restriction to first pattern.In first pattern, the note base station is that the index of first subframe of subscriber equipment transmission data is k, and corresponding ACK/NACK channel is h
kWhen k equals 0, the fixing ACK/NACK information that produces a bit of transfer of data in the subframe 0, and with the mapping method of table 2, untapped two states, two tuple (h
k, Q
2) and (h
k, Q
3) can in second pattern, use.Then when k greater than 0 the time, can whether adopt MIMO according to transfer of data in the subframe k, correspondingly produce the information of 2 bits or 1 bit, and with the mapping method of table 1 or table 2, the ACK/NACK channel is h
kOne of four states two tuples in second pattern, do not use.Note, when needs guarantee that the ACK/NACK information processing method of N subframe is consistent, when k greater than 0 the time, also can be the ACK/NACK information of a bit of the fixing generation of transfer of data in the subframe k, and with the mapping method of table 2.Table 5 is that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.Table 5 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 5:N equals a kind of mapping method of 4: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2)，HARQ-ACK(3)， ??HARQ-ACK(4) | The ACK/NACK channel | The QPSK constellation point |
| ??ACK，ACK，ACK，ACK | ??h 2 | ??Q 4 |
| ??ACK，ACK，ACK，NACK/DTX | ??h 2 | ??Q 3 |
| ??ACK，ACK，NACK/DTX，ACK | ??h 4 | ??Q 4 |
| ??ACK，ACK，NACK/DTX，NACK/DTX | ??h 2 | ??Q 2 |
| ??ACK，NACK/DTX，ACK，ACK | ??h 3 | ??Q 4 |
| ??ACK，NACK/DTX，ACK，NACK/DTX | ??h 1 | ??Q 3 |
| ??ACK，NACK/DTX，NACK/DTX，ACK | ??h 1 | ??Q 2 |
| ??NACK/DTX，ACK，ACK，ACK | ??h 3 | ??Q 3 |
| ??NACK/DTX，ACK，ACK，NACK/DTX | ??h 3 | ??Q 2 |
| ??NACK/DTX，ACK，NACK/DTX，ACK | ??h 4 | ??Q 3 |
| ??NACK/DTX，ACK，NACK/DTX，NACK/DTX | ??h 2 | ??Q 1 |
| ??NACK/DTX，NACK/DTX，ACK，ACK | ??h 4 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，ACK，NACK/DTX | ??h 3 | ??Q 1 |
| ??NACK/DTX，NACK/DTX，NACK/DTX，ACK | ??h 4 | ??Q 1 |
| ??DTX，NACK/DTX，NACK/DTX，NACK/DTX | ??N/A | ??N/A |
Another kind of possible distribution method is described below, promptly in first pattern, feed back the ACK/NACK information of 1 bit or 2 bits according to number of codewords, available upstate two tuples in second pattern reduce simultaneously, promptly need the combination of more ACK/NACK feedback information is represented with same state two tuples.The present invention does not limit the method for in second pattern feedback information being classified and shining upon.
Embodiment two:
First pattern is used to handle following transfer of data situation: subscriber equipment is judged it and has been received that the base station sends to its interior data of first descending sub frame, the index of remembering this subframe is k, but in the k+1～N-1 descending sub frame, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data.Comprise two kinds of following situations.First kind of situation is that the base station only is subscriber equipment transmission data in a descending sub frame, and subscriber equipment has been received the data of this descending sub frame.Second kind of situation is that the base station is that subscriber equipment sends data in a plurality of descending sub frames, and subscriber equipment received that the base station sends to the data in its first descending sub frame, and does not all receive for the data of its transmission in other descending sub frames the base station.
Like this, in first pattern, subscriber equipment sends 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates every other descending sub frame is DTX, and the DTX here is that represent the base station be subscriber equipment transmission data.The transfer of data situation that does not have processing in second mode treatment, first pattern.Be subscriber equipment judge the base station in a plurality of descending sub frames for it has sent data, the base station sends the ACK/NACK/DTX feedback information of a plurality of subframes.In fact attention: DTX has represented two possible implications, to the transfer of data of a descending sub frame, when one of them implication has been handled, then only handles another implication in second pattern in first pattern.
The method of the ACK/NACK information of the actual expression of definition status two tuples in two kinds of feedback models is below described.The note subscriber equipment judges that the base station is k for the index that it sends first subframe of data, and corresponding ACK/NACK channel is h
k, and the constellation point of note QPSK modulation is Q
i, i=1,2,3,4.Thereby in first pattern, when representing 2 bit ACK/nack message, use 4 state two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4); When representing 1 bit ACK/nack message, use 2 state two tuple (h
k, Q
1) and (h
k, Q
4).
Suppose in first pattern expression ACK or (ACK, constellation point ACK) is Q
4, i.e. state two tuple (h
k, Q
4).State two tuple (h are also used in feedback information combination below then in second pattern
k, Q
4) represent that promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK, and the feedback information of the k+1～N-1 descending sub frame is NACK or DTX.(h
k, Q
4) in addition other state that uses in first pattern two tuples can not be in the ACK/NACK information that is used for below second pattern expression, promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK or NACK, and has at least one to be ACK in the feedback information of the k+1～N-1 descending sub frame.But, be not k if subscriber equipment is judged the base station for index that it sends first subframe of data, and subscriber equipment receives data in subframe k, then ACK/NACK channel h
kOne of four states two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4) can in second pattern, use.
Judge it when subscriber equipment and received that the base station sends to the data in its first descending sub frame, the index of remembering this subframe is k, and in the k+1～N-1 descending sub frame, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data.At this moment adopt first pattern to send 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates the k+1～N-1 descending sub frame is DTX.
In first pattern, can shine upon 2 bits and 1 bit ACK/nack message with the method for table 1 among the embodiment one and table 2.The feedback information that does not have in second mode treatment, first pattern to handle makes up, and the present invention does not limit the method for in second pattern feedback information being classified and shining upon.
Embodiment three:
Here suppose that in first pattern first subframe that the regulation base station sends data is meant that the base station sends first subframe of dynamic data.In LTE TDD, the DAI of the dynamic down control channel in this subframe is 0.Below two kinds of situations in second pattern, handle, promptly the base station has only sent the situation of semi-static downlink data; Though perhaps the base station has sent dynamic downlink data and semi-static downlink data simultaneously, subscriber equipment does not detect the dynamic dispatching control channel, thereby at subscriber equipment, current have only semi-static downlink data transmission.
First pattern is used to handle following transfer of data situation: subscriber equipment is judged it and has been received that the base station sends to its interior data of first dynamic descending sub frame, the index of remembering this subframe is k, and in other descending sub frames, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data; Though perhaps but subscriber equipment has been received the data decoding error that the base station sends.Like this, in first pattern, subscriber equipment sends 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates the 0th～k-1 descending sub frame is DTX, and the DTX here is that to represent the base station be subscriber equipment transmission data; The implicit simultaneously feedback information that indicates the k+1～N-1 descending sub frame is DTX or NACK, and the DTX here is that to represent the base station be not subscriber equipment transmission data, but perhaps the base station is that subscriber equipment has sent the data subscriber equipment and do not receive these data.
The transfer of data situation that does not have processing in second mode treatment, first pattern.Promptly or subscriber equipment do not receive that the base station sends to the data in its first dynamic descending sub frame, perhaps the base station for other descending sub frames of its transmission data at least one feedback information be ACK.In fact attention: DTX has represented two possible implications, to the transfer of data of a descending sub frame, when one of them implication has been handled, then only handles another implication in second pattern in first pattern.
The method of the ACK/NACK information of the actual expression of definition status two tuples in two kinds of patterns is below described.The note subscriber equipment judges that the base station is k for the index that it sends first descending sub frame of dynamic data, and corresponding ACK/NACK channel is h
k, and the constellation point of note QPSK modulation is Q
i, i=1,2,3,4.Thereby in first pattern, when representing 2 bit ACK/nack message, use 4 state two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4); When representing 1 bit ACK/nack message, use 2 state two tuples, for example (h
k, Q
1) and (h
k, Q
4).
The note subscriber equipment judges that the base station is k for the index that it sends first dynamic descending sub frame of data, and corresponding ACK/NACK channel is h
kFor fear of obscuring between the state, the ACK/NACK channel h that in first pattern, has used
kState two tuples of forming can not be used for the ACK/NACK information below the expression of second pattern, promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK or NACK, and has at least one to be ACK in the feedback information of the k+1～N-1 descending sub frame.But if subscriber equipment has been received the data among the subframe p, corresponding ACK/NACK channel is h
p, and to judge subframe p be not that the base station is its first subframe that sends dynamic data, then ACK/NACK channel h
pOne of four states two tuples can in second pattern, use.In addition, when subscriber equipment had only been received the data of the descending sub frame that sends semi-static data, the index of remembering this subframe was q, and corresponding ACK/NACK channel is h
q, ACK/NACK channel h then
qOne of four states two tuples can in second pattern, use, in fact because in second pattern, the data transmission and processing of each subframe obtains the ACK/NACK of a bit, only needs to use h
qTwo state two tuples, specifically use those two state two tuples to carry out co-design in conjunction with other feedback informations.
The mapping method of the state that is combined to two tuples of each ACK/NACK information when N equals 2,3 and 4 is described below, notices that these forms are some examples, the present invention does not limit concrete mapping method.For convenience, represent that with different forms feedback information is to the mapping relations of state two tuples in first pattern and second pattern respectively here.In fact, the form of two kinds of patterns also can comprehensively be a form that comprises all feedback informations to the mapping relations of state two tuples.
Judge it when subscriber equipment and received that the base station sends to the data in its first dynamic descending sub frame, the index of remembering this subframe is k, and in other descending sub frames, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data; Though perhaps but subscriber equipment has been received the data decoding error that the base station sends.At this moment adopt first pattern to send 1 bit of the transfer of data in the descending sub frame k or the ACK/NACK information of 2 bits; And the implicit feedback information that indicates other descending sub frames is DTX or NACK.
Table 6 is methods of a kind of mapping 2 bit ACK/nack message and state two tuples.For example, when the transfer of data in the subframe has adopted MIMO, can be by table 1 mapping 2 bit ACK/nack message.Table 7 is methods of a kind of mapping 1 bit ACK/nack message and state two tuples, and it can regard a subclass of table 1 as.Here, the note base station is that the interior index of first dynamic descending sub frame of subscriber equipment transmission data is k, and the ACK/NACK channel of subframe k correspondence is h
k, the constellation point of QPSK modulation is Q
i, i=1,2,3,4, the BPSK modulation is the constellation point (Q with two QPSK modulation
1And Q
4) expression.
Table 6: the QPSK modulator approach of first pattern
| 2 bit ACK/nack message | The ACK/NACK channel | The QPSK constellation point |
| ??NACK，NACK | ??h k | ??Q 1 |
| ??NACK，ACK | ??h k | ??Q 2 |
| ??ACK，NACK | ??h k | ??Q 3 |
| ??ACK，ACK | ??h k | ??Q 4 |
Table 7: the BSPK modulator approach of first pattern
| 1 bit ACK/nack message | The ACK/NACK channel | The QPSK constellation point |
| ??NACK | ??h k | ??Q 1 |
| ??ACK | ??h k | ??Q 4 |
When N equaled 2, table 8 was that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.In table 8, preceding two row are process user equipment has only been received semi-static data at first descending sub frame situations; Row second from the bottom and countdown line 3 are process user equipment has only been received semi-static data at second descending sub frame situations.Table 8 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 8:N equals a kind of mapping method of 2: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2) | The ACK/NACK channel | The QPSK constellation point |
| ??NACK，NACK/DTX | ??h 1 | ??Q 1 |
| ??ACK，NACK/DTX | ??h 1 | ??Q 4 |
| ??ACK，ACK | ??h 2 | ??Q 4 |
| ??NACK，ACK | ??h 2 | ??Q 1 |
| ??DTX，ACK | ??h 2 | ??Q 3 |
| ??DTX，NACK | ??h 2 | ??Q 2 |
| ??DTX，DTX | ??N/A | ??N/A |
When N equaled 3, table 9 was that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.In table 9, preceding two row are process user equipment has only been received semi-static data at first descending sub frame situations; Row second from the bottom and fifth line reciprocal are process user equipment has only been received semi-static data at second descending sub frame situations; Countdown line 3 and fourth from the last are capable to be process user equipment has only been received semi-static data at the 3rd descending sub frame situation.Table 9 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 9:N equals a kind of mapping method of 3: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2)，HARQ-ACK(3) | The ACK/NACK channel | The QPSK constellation point |
| ??NACK，NACK/DTX，NACK/DTX | ??h 1 | ??Q 1 |
| ??ACK，NACK/DTX，NACK/DTX | ??h 1 | ??Q 4 |
| ??ACK，ACK，ACK | ??h 2 | ??Q 4 |
| ??ACK，ACK，NACK/DTX | ??h 2 | ??Q 3 |
| ??ACK，NACK/DTX，ACK | ??h 3 | ??Q 4 |
| ??NACK/DTX，ACK，ACK | ??h 3 | ??Q 3 |
| ??NACK/DTX，ACK，NACK/DTX | ??h 2 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，ACK | ??h 3 | ??Q 2 |
| ??DTX，DTX，NACK | ??h 3 | ??Q 1 |
| ??DTX，NACK，NACK/DTX | ??h 2 | ??Q 1 |
| ??DTX，DTX，DTX | ??N/A | ??N/A |
When N equals 4,, can consider to increase an ACK/NACK channel h because the kind of the feedback information that needs is many
5, the present invention does not limit h
5Preparation method.In order to reduce restriction, can limit to have only in the 4th subframe, having sent downlink data, and the descending sub frame number that sends data simultaneously to be more than or equal to 3 o'clock, just use h when the base station to base station dispatcher
5Come feeding back ACK/nack message.
Table 10 is that mapping ACK/nack message is to a kind of method of state two tuples in second pattern, and it handles all combinations that do not have the feedback information of processing in first pattern.In table 10, preceding two row are process user equipment has only been received semi-static data at first descending sub frame situations; Capable and reciprocal the 8th row of fourth from the last is process user equipment has only been received semi-static data at second descending sub frame a situation; Countdown line 3 and the 6th row reciprocal are process user equipment has only been received semi-static data at the 3rd descending sub frame situations; Row second from the bottom and fifth line reciprocal are process user equipment has only been received semi-static data at the 4th descending sub frame situations.
In table 10, for number of times that reduces detection and the ACK/NACK channel number that takies, feedback information " DTX, DTX, DTX, NACK " and " DTX, DTX, DTX, DTX " person are mapped as N/A, and promptly subscriber equipment does not send any signal.Here, to feedback information " DTX, DTX, DTX, NACK ", can avoid in the 4th subframe, dispatching semi-static data, thereby when the base station only sends semi-static data, avoid feedback information NACK to be mapped as N/A.Like this, feedback information " DTX, DTX; DTX; NACK " but preceding 3 DTX in have at least one to be to represent the actual data subscriber equipment that sent in base station not receive, so the probability that this feedback information occurs is very low, thereby the DTX that can not influence the base station detects performance.Table 10 is an example of second mode map just, and the present invention does not limit other methods to feedback information classification and mapping.
Table 10:N equals a kind of mapping method of 4: second patterns
| ??HARQ-ACK(1)，HARQ-ACK(2)，HARQ-ACK(3)， ??HARQ-ACK(4) | The ACK/NACK channel | The QPSK constellation point |
| ??NACK，NACK/DTX，NACK/DTX，NACK/DTX | ??h 1 | ??Q 1 |
| ??ACK，NACK/DTX，NACK/DTX，NACK/DTX | ??h 1 | ??Q 4 |
| ??ACK，ACK，ACK，ACK | ??h 5 | ??Q 4 |
| ??ACK，ACK，ACK，NACK/DTX | ??h 2 | ??Q 4 |
| ??ACK，ACK，NACK/DTX，ACK | ??h 5 | ??Q 3 |
| ??ACK，ACK，NACK/DTX，NACK/DTX | ??h 2 | ??Q 3 |
| ??ACK，NACK/DTX，ACK，ACK | ??h 5 | ??Q 2 |
| ??ACK，NACK/DTX，ACK，NACK/DTX | ??h 3 | ??Q 4 |
| ??ACK，NACK/DTX，NACK/DTX，ACK | ??h 4 | ??Q 4 |
| ??NACK/DTX，ACK，ACK，ACK | ??h 5 | ??Q 1 |
| ??NACK/DTX，ACK，ACK，NACK/DTX | ??h 3 | ??Q 3 |
| ??NACK/DTX，ACK，NACK/DTX，ACK | ??h 4 | ??Q 3 |
| ??NACK/DTX，ACK，NACK/DTX，NACK/DTX | ??h 2 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，ACK，ACK | ??h 4 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，ACK，NACK/DTX | ??h 3 | ??Q 2 |
| ??NACK/DTX，NACK/DTX，NACK/DTX，ACK | ??h 4 | ??Q 1 |
| ??DTX，NACK，NACK/DTX，NACK/DTX | ??h 2 | ??Q 1 |
| ??DTX，DTX，NACK，NACK/DTX | ??h 3 | ??Q 1 |
| ??DTX，DTX，DTX，NACK | ??N/A | ??N/A |
| ??DTX，DTX，DTX，DTX | ??N/A | ??N/A |
Embodiment four:
Here suppose that in first pattern first subframe that the regulation base station sends data is meant that the base station sends first subframe of dynamic data; And further restriction has only the base station to send the interior dicode word MIMO that adopts of first subframe of dynamic data, when promptly feeding back 2 bit informations, just uses first mode treatment.
In LTE TDD, the DAI of the dynamic down control channel in this subframe is 0.Below two kinds of situations in second pattern, handle, promptly the base station has only sent the situation of semi-static downlink data; Though perhaps the base station has sent dynamic downlink data and semi-static downlink data simultaneously, subscriber equipment does not detect the dynamic dispatching control channel, thereby at subscriber equipment, current have only semi-static downlink data transmission.In addition, receive the base station when subscriber equipment and send first subframe of dynamic data, only need feed back the situation of a bit ACK/NACK, also in second pattern, handle this subframe.
First pattern is used to handle following transfer of data situation: subscriber equipment is judged it and has been received that the base station sends to its interior data of first dynamic descending sub frame, and this subframe needs the ACK/NACK information of 2 bits, the index of remembering this subframe is k, and in other descending sub frames, perhaps the base station does not send data to this subscriber equipment; Perhaps subscriber equipment does not receive that the base station sends to its data; Though perhaps but subscriber equipment has been received the data decoding error that the base station sends.Like this, in first pattern, subscriber equipment sends the ACK/NACK information of 2 bits of the transfer of data in the descending sub frame k; And the implicit feedback information that indicates the 0th～k-1 descending sub frame is DTX, and the DTX here is that to represent the base station be subscriber equipment transmission data; The implicit simultaneously feedback information that indicates the k+1～N-1 descending sub frame is DTX or NACK, and the DTX here is that to represent the base station be not subscriber equipment transmission data, but perhaps the base station is that subscriber equipment has sent the data subscriber equipment and do not receive these data.
The transfer of data situation that does not have processing in second mode treatment, first pattern.Promptly or subscriber equipment receive that the base station sends first subframe of dynamic data, but this subframe only need be fed back a bit ACK/NACK; Perhaps it does not receive that the base station sends to its interior data of first dynamic descending sub frame; Send for it in the base station perhaps that at least one feedback information is ACK in other descending sub frames of data.In fact attention: DTX has represented two possible implications, to the transfer of data of a descending sub frame, when one of them implication has been handled, then only handles another implication in second pattern in first pattern.
The method of the ACK/NACK information of the actual expression of definition status two tuples in two kinds of patterns is below described.The note subscriber equipment judges that the base station is k for the index that it sends first descending sub frame of dynamic data, and corresponding ACK/NACK channel is h
k, and the constellation point of note QPSK modulation is Q
i, i=1,2,3,4.Thereby in first pattern, use 4 state two tuple (h
k, Q
1), (h
k, Q
2), (h
k, Q
3) and (h
k, Q
4).
The note subscriber equipment judges that the base station is k for the index that it sends first dynamic descending sub frame of data, and corresponding ACK/NACK channel is h
kFor fear of obscuring between the state, the ACK/NACK channel h that in first pattern, has used
kState two tuples of forming can not be used for the ACK/NACK information below the expression of second pattern, promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK or NACK, and has at least one to be ACK in the feedback information of the k+1～N-1 descending sub frame.But if subscriber equipment has been received the data among the subframe p, corresponding ACK/NACK channel is h
p, and to judge subframe p be not that the base station is its first subframe that sends dynamic data, then ACK/NACK channel h
pOne of four states two tuples can in second pattern, use.In addition, the data that send the descending sub frame of semi-static data have only been received when subscriber equipment, when perhaps the base station only needed 1 bit ACK/nack message for its first dynamic descending sub frame that sends data, the index of remembering this subframe was q, and corresponding ACK/NACK channel is h
q, ACK/NACK channel h then
qOne of four states two tuples can in second pattern, use, in fact because in second pattern, the data transmission and processing of each subframe obtains the ACK/NACK of a bit, only needs to use h
qTwo state two tuples, specifically use those two state two tuples to carry out co-design in conjunction with other feedback informations.
N equaled 2,3 and 4 situation, table 6, table 8, table 9 and table 10 among the embodiment three can be used to shine upon the state that is combined to two tuples of each ACK/NACK information in the present embodiment, but according to the restrictive condition of present embodiment, the meaning of each row of table 8, table 9 and table 10 is difference to some extent.Notice that these forms are some examples, the present invention does not limit concrete mapping method.
Claims (11)
1. the method for a feeding back ACK/nack message comprises step:
Correctly receive the data of first descending sub frame of base station transmission when subscriber equipment, and when other subframes ACK/NACK feedback information is NACK or DTX, subscriber equipment sends the ACK/NACK feedback information of first subframe, the ACK/NACK feedback information that indicates other subframes simultaneously is NACK or DTX, is designated as first pattern;
If subscriber equipment does not correctly receive the data of first descending sub frame of base station transmission, perhaps other subframes ACK/NACK feedback information is ACK, subscriber equipment is based on the ACK/NACK channel of QPSK modulation and selection use in a plurality of ACK/NACK channels, transmit the ACK/NACK information of a plurality of descending sub frames, be designated as second pattern.
2. method according to claim 1 is characterized in that, in first pattern, the bit number of the ACK/NACK of feedback equates with the code word number of first descending sub frame that the base station sends.
3. method according to claim 2 is characterized in that, the bit number of feeding back ACK/NACK is 1.
4. method according to claim 1, it is characterized in that, it is k for the index that it sends first subframe of data that the note subscriber equipment correctly receives the base station, state two tuples of using in first pattern can not be used for the ACK/NACK information below the expression of second pattern, promptly the 0th～k-1 descending sub frame feedback information is DTX, the feedback information of k descending sub frame is ACK or NACK, and has at least one to be ACK in the feedback information of the k+1～N-1 descending sub frame.
5. method according to claim 1 is characterized in that, subscriber equipment correctly receives the base station and is not k for index that it sends first subframe of data, and subscriber equipment receives data in subframe k, then ACK/NACK channel h
kOne of four states two tuples can in second pattern, use.
6. method according to claim 1 is characterized in that, in first pattern, the ACK/NACK feedback that the base station sends first subframe of data is a plurality of bits; In second pattern, the ACK/NACK feedback that the base station sends first subframe of data is 1 bit.
7. method according to claim 1 is characterized in that, first subframe that the base station sends data is first subframe that the base station sends dynamic data.
8. method according to claim 1, it is characterized in that, the data that send the descending sub frame of semi-static data have only been received when subscriber equipment, when perhaps the base station only needs 1 bit ACK/nack message for its first dynamic descending sub frame that sends data, the index of remembering this subframe is q, and corresponding ACK/NACK channel is h
q, ACK/NACK channel h then
pTwo state two tuples in second pattern, use.
9. method that receives ACK/NACK information comprises step:
To a subscriber equipment, the base station for this subscriber equipment has sent each descending sub frames of data, is detected each possible state two tuples according to reality.
Judge that when the base station state two tuples that subscriber equipment sends are when belonging to first pattern of claim 1, the base station obtains its ACK/NACK feedback information that sends first subframe of data, and obtains the ACK/NACK feedback information that other send the subframe of data.
Judge that when the base station state two tuples that subscriber equipment sends are when belonging to second pattern of claim 1, according to second pattern, the base station obtains the ACK/NACK feedback information of each subframe that has sent data.
10. method according to claim 9 is characterized in that, to state two tuples that belong to first pattern, the base station obtains the ACK/NACK information of each code word in first descending sub frame that the base station sends data respectively.
11. method according to claim 9 is characterized in that, to state two tuples that belong to second pattern, the base station obtains sending the ACK/NACK/DTX information of each subframe of data.
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Cited By (16)
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