CN101646237A - Method for generating ACK/NACK information - Google Patents
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Abstract
The invention relates to a method for generating ACK/NACK information, which comprises the following steps that: the number of downlink resources for sending data to user equipment by a base station is N', N' pieces of ACK/NACK information exist aiming at the N' downlink resources, the number of ACK/NACK bits sent in an uplink subframe is M, and when N' is more than or equal to M, the N' downlinkresources after sending the data are divided into M groups, and each group of the downlink resources outputs one piece of ACK/NACK or DTX information in a binding mode; and the user equipment sends the ACK/NACK or DTX information in the uplink subframe. The method fully uses the capability of sending multi-bit ACK/NACK in the uplink direction, and can improve the downlink throughput.
Description
Technical Field
The present invention relates to a wireless communication system, and more particularly, to a method of generating ACK/NACK information in a wireless communication system.
Background
The 3GPP standardization organization is performing Long Term Evolution (LTE) on its existing system specifications. Fig. 1 is a frame structure of an LTE TDD system. Each length of 307200 XTsA radio frame of 10ms is equally divided into two radio frames of 153600 × T lengthsHalf frame of 5 ms. Each field contains 8 fields of length 15360TsTime slot of 0.5ms and 3 special fields, i.e., downlink pilot time slot (DwPTS), guard interval (GP) and uplink pilot time slot (UpPTS), the sum of the lengths of the 3 special fields is 30720Ts1 ms. Each subframe consists of two consecutive slots, i.e., the k-th subframe includes slot 2k and slot 2k + 1. Subframe 1 and subframe 6 contain the 3 special fields described above. As table 1, there are 7 downlink-uplink configurations supported in the current LTE specification.
Table 1: downlink-uplink configuration for LTE TDD
When HARQ transmission is carried out on downlink data in LTE, a subframe is used as TTI in downlink scheduling, namely when MIMO is not adopted, the downlink data of each subframe corresponds to 1 bit of ACK/NACK information; when MIMO is employed, downlink data of each subframe corresponds to 2-bit ACK/NACK information. In the configuration sequence numbers 1 to 5 in table 1, the number of downlink subframes is greater than the number of uplink subframes in each radio frame, so that ACK/NACK information of a plurality of downlink subframes needs to be transmitted in one uplink subframe. Here, one method is to process the ACK/NACK information of the uplink subframe corresponding to multiple downlink subframes to obtain 1 bit or 2 bits, which has the advantages of multiplexing the existing ACK/NACK channel structure and ensuring uplink coverage, and has the disadvantage of causing system throughput loss when relatively many ACK/NACK bits need to be bound to 1 bit or 2 bits. Another method is to process the ACK/NACK information of the uplink subframe corresponding to multiple downlink subframes to obtain multiple bits, for example, in LTE TDD, the ACK/NACK information is processed to obtain 4 bits at most. Feeding back multi-bit ACK/NACK information helps to reduce the loss of system throughput.
Fig. 2 is a method of generating multi-bit ACK/NACK information in an LTE TDD system. It is applicable to configuration numbers 1-4 in table 1. That is, the downlink data transmission of each subframe generates one bit of ACK/NACK information. Here, when MIMO is not employed, 1-bit ACK/NACK information of one subframe is directly obtained; when MIMO is used, two bits of ACK/NACK information within one subframe are processed to obtain 1-bit ACK/NACK information to be transmitted. The processing method here is that when the 2-bit ACK/NACK information is all ACK, ACK is sent; when there are at least 1 NACK in the 2-bit ACK/NACK information, NACK is transmitted.
For the configuration sequence number 5 in table 1, one radio frame includes 9 downlink subframes and 1 uplink subframe, so that ACK/NACK information corresponding to downlink data transmission of 9 subframes at most needs to be transmitted in one uplink subframe. Here, according to the current discussion result, the number of ACK/NACK bits transmitted in the uplink subframe is still 4 bits at the maximum. One possible method is to first generate one bit of ACK/NACK information for downlink data transmission of each subframe; then, the 9 subframes are divided into 4 groups, and each group of subframes generates 1 bit of ACK/NACK information. Here, for each group of subframes, when ACK/NACK information of all subframes in the group is ACK, the bundled ACK/NACK information output is ACK; when there are at least 1 NACK, the bundled ACK/NACK information output is NACK. As shown in FIG. 3, an ACK/NACK bit is bound in subframe # 9 of radio frame n-2 and subframes # 0 and #1 of radio frame n-1; binding an ACK/NACK bit in sub-frames # 3 and #4 of a wireless frame n-1; binding an ACK/NACK bit in sub-frames # 5 and #6 of a wireless frame n-1; subframes # 7 and #8 of radio frame n-1 have one ACK/NACK bit bundled.
This method is to fixedly divide subframes into 4 groups according to the maximum number of downlink subframes in each period, and the subframes in each group generate one bit ACK/NACK. When the downlink data is transmitted in only a few groups of subframes, the method cannot fully utilize the capability of transmitting the ACK/NACK with 4 bits at most in the uplink, thereby causing the loss of the downlink throughput. It is assumed that downlink data is transmitted in 4 subframes, which are subframe # 9 of radio frame n-2 and subframes # 0, #1, and #2 of radio frame n-1. According to the method of FIG. 3, an ACK/NACK bit is bound into subframe # 9 of radio frame n-2 and subframes # 0 and #1 of radio frame n-1; subframe # 3 of radio frame n-1 directly corresponds to one ACK/NACK bit. Thus, only two bundled ACK/NACK bits are valid. Actually, the capability of sending ACK/NACK in the uplink direction is 4 ACK/NACK bits, and ACK/NACK feedback can be performed on each subframe, so the method shown in fig. 3 may cause a loss of downlink throughput.
Disclosure of Invention
An object of the present invention is to provide an apparatus and method for generating multi-bit ACK/NACK information in a wireless communication system.
According to an aspect of the present invention, a method of generating ACK/NACK information includes the steps of:
the number of downlink resources for the base station to transmit data to the user equipment is N ', N ' pieces of ACK/NACK information are provided aiming at the N ' downlink resources, the number of ACK/NACK bits transmitted in the uplink subframe is M,
when N '> ═ M, dividing N' downlink resources which send data into M groups, and binding and outputting 1 ACK/NACK or DTX information by each group of downlink resources;
the user equipment transmits ACK/NACK or DTX information in the uplink subframe.
According to another aspect of the present invention, a method of generating ACK/NACK information includes the steps of:
the number of downlink resources for the base station to transmit data to the user equipment is N ', N ' pieces of ACK/NACK information are provided aiming at the N ' downlink resources, the number of ACK/NACK bits transmitted in the uplink subframe is M,
when N '< M, for N' downlink resources which send data, the ACK/NACK or DTX information of each downlink resource is uniquely mapped to one of M ACK/NACK or DTX;
the user equipment transmits ACK/NACK or DTX information in the uplink subframe.
The method of the invention fully utilizes the capability of sending multi-bit ACK/NACK in the uplink direction, and can improve the downlink throughput.
Drawings
Fig. 1 is a frame structure of LTE TDD;
FIG. 2 is a method of generating ACK/NACK information of at most 4 bits;
fig. 3 is a method of TDD configuration 5 generating up to 4-bit ACK/NACK information;
FIG. 4 is a method of generating M-bit ACK/NACK information;
fig. 5 is embodiment 1 of the invention handling LTE TDD configuration 5;
fig. 6 is embodiment 2 of the invention handling LTE TDD configuration 5;
fig. 7 is embodiment 3 of the invention handling LTE TDD configuration 5;
FIG. 8: embodiment 4 of the invention deals with LTE TDD configuration 5;
FIG. 9: the present invention deals with embodiment 5 of LTE TDD configuration 5.
Detailed Description
It is assumed that ACK/NACK information for data transmission on N downlink resources needs to be transmitted in the same uplink subframe. The downlink resource refers to a part of time frequency resources, and the downlink data transmission performed on the part of time frequency resources needs to send ACK/NACK feedback information of k bits in the uplink direction. k is equal to the number of codewords (codeword) contained in the transmitted data in one downlink resource, where each codeword contains independent CRC check information and requires 1 ACK/NACK bit in the uplink direction. In the LTE system, one downlink resource corresponds to one downlink subframe. It is further assumed that the uplink direction supports simultaneous transmission of ACK/NACK information of up to M bits. The present invention proposes a method of generating at most M bits when N is greater than M.
The method of the invention is shown in figure 4:
401: the user equipment receives the dynamic downlink control signaling so as to judge whether dynamic downlink data is sent to the user equipment in one downlink resource or not; on the other hand, the user equipment can know that the semi-statically configured downlink data, such as VoIP service, is sent in those downlink resources according to the semi-statically configured signaling. Thus, in the downlink resource corresponding to one uplink subframe, the user equipment obtains the number of the downlink resources for which the base station sends downlink data, and records N'.
402: next, the N' downlink resources to which the downlink data is transmitted are processed, respectively. One ACK/NACK information will be generated for each downlink resource. When a code word k for sending data in a downlink resource is 1, generating 1-bit ACK/NACK information; when the number of code words of data sent in one downlink resource is k, correspondingly generating 1-bit ACK/NACK information for each code word, and generating k-bit ACK/NACK information in total, and finally outputting ACK for the downlink resource when all k ACK/NACK information are ACK; and finally outputting NACK for the downlink resource when the at least one ACK/NACK information is NACK.
403: the maximum number of ACK/NACK bits to support transmission in the uplink subframe is M. When N '> -. M, N' downlink resources transmitting downlink data are divided into M groups, and then one ACK/NACK information is bound to each group of downlink resources. The invention does not limit the method of grouping. For each group of downlink resources, when the ACK/NACK information of all the downlink resources in the group is ACK, the ACK/NACK information output after binding is ACK; when there are at least 1 NACK, the ACK/NACK information output after bundling is NACK.
404: when N '< M, for N' downlink resources that have transmitted downlink data, the ACK/NACK information obtained in step 402 for each downlink resource is the ACK/NACK information that is to be finally transmitted.
405: the user equipment transmits ACK/NACK information of M bits.
In step 401, for dynamic downlink data transmission, the user equipment may not receive data in one or more downlink resources, but through some mechanism, the user equipment may know that it has lost data in several downlink resources. The invention is not limited to a particular method of such detection mechanism. Therefore, in counting the N downlink resources corresponding to one uplink subframe, when the base station sends the downlink resources of data to the user equipment, placeholder downlink resources need to be inserted to represent lost data transmission detected by the user equipment. That is, the N' downlink resources in which the base station transmits downlink data for the ue include the downlink resources that actually receive the data and those detected lost data transmissions.
In step 402, DTX is output for the placeholder downlink resources inserted in step 401, that is, those lost data transmissions detected by the ue, to represent that the data transmissions are lost.
In step 403, when a certain group contains the placeholder downlink resources inserted in step 401, i.e. lost data transmissions detected by the user equipment, the output information is DTX.
In step 404, DTX is output for the placeholder downlink resources inserted in step 401, i.e. those lost data transmissions detected by the user equipment.
In step 405, DTX and NACK are represented by the same state, and ACK is identified by the other state, so that a single transmission can be represented by 1-bit information. Finally, the user equipment sends ACK/NACK information of M bits. In addition, if DTX and NACK need to be distinguished, M three-valued information (ACK, NACK and DTX) has to be transmitted.
In steps 403 and 404, a method for sorting downlink resources to which data has been transmitted is described. The data sent in each downlink resource is not distinguished from dynamic data or semi-static data, and the data are directly sequenced according to the time sequence of each downlink resource. Or arranging all downlink resources for sending dynamic data in front of the downlink resources for sending semi-static data; or all downlink resources for transmitting the semi-static data are arranged in front of the uplink resources and then the downlink resources for transmitting the dynamic data are arranged.
In step 403, N' downlink resources for transmitting downlink data are divided into M groups, and the number of downlink resources in each group may be different by 1 or 0 in order to average the performance of downlink data transmission in each group of downlink resources. When N 'can be divided by M, the number of the downlink resources in each group is equal, and the number of the downlink resources in each group is N'/M; when N' is not divisible by M, the number of downlink resources in a group is
OrHere, ,represents the lower rounding. Thus, it is remembered that
Thereby comprising K+The number of groups of sub-frames is C+Mod (N', M), containing K-The number of groups of sub-frames is C-＝M-C+。
In fact, step 402 may be eliminated and the functions of step 403 and step 404 may be extended to be performed simultaneously 402. Step 403 is expanded, that is, when N '> ═ M, N' downlink resources (which may include placeholder downlink resources) for transmitting downlink data are divided into M groups, and then, for each group, ACK/NACK information of each codeword of each downlink resource in the group is combined. Here, when the ACK/NACK information of all codewords in a group is ACK, finally outputting ACK for the downlink resource; finally outputting NACK aiming at the downlink resource when at least one ACK/NACK information in the group is NACK; when a certain group contains placeholder downlink resources, i.e. lost data transmissions detected by the user equipment, the output information is DTX. Step 404 is expanded, that is, when N '< M, for N' downlink resources (possibly including placeholder downlink resources) that have transmitted downlink data, the ACK/NACK information of each codeword of each downlink resource is combined. Here, when ACK/NACK information of all codewords of one downlink resource is ACK, finally outputting ACK for the downlink resource; and finally outputting the NACK aiming at the downlink resource when at least one ACK/NACK information in the downlink resource is NACK. For placeholder downlink resources, that is, those lost data transmissions detected by the user equipment, the output information is DTX.
Examples
In this section, five embodiments of the invention are shown, and in order to avoid making the description of the present patent redundant, detailed descriptions of publicly known functions or means, etc. are omitted in the following description.
Example 1
It is assumed that the uplink direction supports simultaneous transmission of ACK/NACK information of at most M bits, and the number N' of downlink resources for which data is transmitted to the user equipment. The N' downlink resources that have sent the data are logically numbered, so that one grouping method is to first assign C+Each comprises K+A group of downlink resources, then allocate C-Each comprises K-A group of downlink resources.
Taking downlink-uplink configuration sequence number 5 of LTE TDD as an example, ACK/NACK information of downlink data in at most 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending ACK/NACK information of 4 bits at most. As shown in fig. 5, a specific example of this method is assumed here that the base station transmits downlink data to the ue in 6 downlink subframes, where the 6 subframes are subframe 1 and subframe 4 to subframe 8. According to the method of the present invention, firstly, the 6 subframes which send the downlink data are processed, and each subframe correspondingly obtains 1 bit. When the sub-frame does not adopt the MIMO technology, 1-bit ACK/NACK information of one sub-frame is directly obtained; when the subframe adopts the MIMO technology, the ACK/NACK information of two bits in one subframe is processed to obtain the ACK/NACK information of 1 bit to be sent. That is, when the 2-bit ACK/NACK information is ACK, the ACK is obtained; when there are at least 1 NACK in the 2-bit ACK/NACK information, NACK is obtained. Then, the 6 subframes in which the downlink data is transmitted are divided into 4 groups, the first group includes subframe 1 and subframe 4, the second group includes subframe 5 and subframe 6, the third group includes subframe 7, and the fourth group includes subframe 8. Here, for the subframes in each group, when ACK/NACK information of all subframes in the group is ACK, the bundled ACK/NACK information is ACK; when there are at least 1 NACK, the bundled ACK/NACK information is NACK.
Example 2
It is assumed that the uplink direction supports simultaneous transmission of ACK/NACK information of at most M bits, and the number N' of downlink resources for which data is transmitted to the user equipment. Note that the logical numbers of N' downlink resources to which data is transmitted are N, where N is 0, 1. In this way, it can be defined that the logical number of the downlink resource included in the mth group satisfies M — mod (n, M), and M — 0, 1.
Taking downlink-uplink configuration 5 of LTE TDD as an example, ACK/NACK information of downlink data in at most 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending ACK/NACK information of 4 bits at most. As shown in fig. 6, it is assumed that the base station transmits downlink data to the ue in 6 downlink subframes, where the 6 subframes are subframe 1 and subframe 4 to subframe 8. According to the method of the present invention, firstly, the 6 subframes which send the downlink data are processed, and each subframe correspondingly obtains 1 bit. When the sub-frame does not adopt the MIMO technology, 1-bit ACK/NACK information of one sub-frame is directly obtained; when the subframe adopts the MIMO technology, the ACK/NACK information of two bits in one subframe is processed to obtain the ACK/NACK information of 1 bit to be sent. That is, when the 2-bit ACK/NACK information is ACK, the ACK is obtained; when there are at least 1 NACK in the 2-bit ACK/NACK information, NACK is obtained. Then, the 6 subframes in which the downlink data is transmitted are divided into 4 groups, the first group includes subframe 1 and subframe 7, the second group includes subframe 4 and subframe 8, the third group includes subframe 5, and the fourth group includes subframe 6. Here, for the subframes in each group, when ACK/NACK information of all subframes in the group is ACK, the bundled ACK/NACK information is ACK; when there are at least 1 NACK, the bundled ACK/NACK information is NACK.
Example 3
Taking downlink-uplink configuration 5 of LTE TDD as an example, ACK/NACK information of downlink data in at most 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending ACK/NACK information of 4 bits at most. Fig. 7 shows another specific example of the present invention, which assumes that the base station transmits downlink data to the ue only in 3 downlink subframes, where the 3 subframes are subframe 1 to subframe 3. According to the method of the present invention, first, the 3 subframes that have sent downlink data are processed, and each subframe correspondingly obtains 1 bit. When the sub-frame does not adopt the MIMO technology, 1-bit ACK/NACK information of one sub-frame is directly obtained; when the subframe adopts the MIMO technology, the ACK/NACK information of two bits in one subframe is processed to obtain the ACK/NACK information of 1 bit to be sent. That is, when the 2-bit ACK/NACK information is ACK, the ACK is obtained; when there are at least 1 NACK in the 2-bit ACK/NACK information, NACK is obtained. Then, since the number of subframes in which downlink data is transmitted is smaller than the maximum ACK/NACK bit number supported in the uplink direction, ACK/NACK bits of the 3 subframes are mapped to 1 transmission ACK/NACK bit, respectively.
Example 4
This embodiment describes the method for processing DTX according to the present invention based on the grouping method of the first embodiment, and the method is also applicable to the method of the second embodiment. In the LTE system, a physical downlink control signaling (PDCCH) includes a field for indicating how many downlink resources before a current downlink resource a base station transmits PDCCH and data in N downlink resources corresponding to an uplink subframe, and this field is called a Downlink Assignment Indication (DAI). The DAI is 2 bits, and may indicate 4 values of 0 to 3, and when the number of PDCCHs of dynamic downlink data scheduled by the base station is greater than 4, the 4 values of the DAI may be cyclically used, that is, the DAI sequence is {0, 1, 2, 3, 0, 1, 2, 3, 0, ·.
Taking downlink-uplink configuration sequence number 5 of LTE TDD as an example, ACK/NACK information of downlink data in at most 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending ACK/NACK information of 4 bits at most. As shown in fig. 8, it is assumed that the base station transmits downlink data to the ue in 6 downlink subframes, where the 6 subframes are subframe 1 and subframe 4 to subframe 8, and the DAIs in the PDCCH of the 6 downlink subframes are 0, 1, 2, 3, 0, and 1, respectively. And the user equipment does not receive the PDCCH in subframe 4, and thus does not receive the downlink data transmitted in subframe 4. But through the processing of the DAI, the DAI in the PDCCH of the subframe 1 is 0, and the DAI in the PDCCH of the subframe 5 is 2, the user equipment can know that it has lost data of one subframe with the DAI of 1. Note that the user equipment cannot know that this lost data is in that subframe, but the user equipment may know that this lost data must be located in one of subframes 2, 3, or 4. Thus, the ue uses a placeholder subframe to represent the lost subframe with DAI of 1. Next, according to the method of the present invention, first, the 6 subframes that have transmitted downlink data are processed respectively: for the subframe which receives the data, when the subframe does not adopt the MIMO technology, the ACK/NACK information of one subframe is directly obtained; when the subframe adopts the MIMO technology, processing the ACK/NACK information of two bits in one subframe to obtain the ACK/NACK information to be sent; for placeholder subframes, DTX is output. Then, the 6 subframes in which the downlink data is transmitted are divided into 4 groups, the first group includes subframe 1 and placeholder subframes, the second group includes subframe 5 and subframe 6, the third group includes subframe 7, and the fourth group includes subframe 8. Here, for the subframes in each group, when ACK/NACK information of all subframes in the group is ACK, the bundled ACK/NACK information is ACK; when there are at least 1 NACK in the group, the bound ACK/NACK information is NACK; when the group contains a placeholder, DTX is output.
Example 5
In this embodiment, based on the fourth embodiment, the semi-statically and dynamically scheduled downlink data are further distinguished.
Taking downlink-uplink configuration sequence number 5 of LTE TDD as an example, ACK/NACK information of downlink data in at most 9 subframes needs to be transmitted in the same uplink subframe, and the uplink subframe supports sending ACK/NACK information of 4 bits at most. As shown in fig. 9, it is assumed that the base station transmits downlink data for the ue in 7 downlink subframes, where in 6 subframes, subframe 1 and subframes 4 to 8 transmit dynamic data, and the DAIs in the PDCCH of the 6 downlink subframes are 0, 1, 2, 3, 0 and 1, respectively; semi-static data is transmitted in subframe 3. It is assumed that the user equipment does not receive the PDCCH in subframe 4 and thus does not receive downlink data transmitted in subframe 4. But through the processing of the DAI, the DAI in the PDCCH of the subframe 1 is 0, and the DAI in the PDCCH of the subframe 5 is 2, the user equipment can know that it has lost data of one subframe with the DAI of 1. Note that the user equipment cannot know that this lost data is in that subframe, but the user equipment may know that this lost data must be located in one of subframes 2 or 4. Thus, the ue uses a placeholder subframe to represent the lost subframe with DAI of 1. Next, the ue orders each transmitted data by itself, where the assumption is that the semi-static scheduling data subframe is before, and the dynamic scheduling data subframe is after, i.e. the order is: subframe 3, subframe 1, placeholder subframe, subframe 5, subframe 6, subframe 7, and subframe 8. Then, according to the method of the present invention, the 7 subframes that have transmitted downlink data are processed respectively: for the subframe which receives the data, when the subframe does not adopt the MIMO technology, the ACK/NACK information of one subframe is directly obtained; when the subframe adopts the MIMO technology, processing the ACK/NACK information of two bits in one subframe to obtain the ACK/NACK information to be sent; for placeholder subframes, DTX is output. Then, the 7 subframes in which the downlink data is transmitted are divided into 4 groups, the first group includes subframe 3 and subframe 1, the second group includes placeholder subframe and subframe 5, the third group includes subframe 6 and subframe 7, and the fourth group includes subframe 8. Here, for the subframes in each group, when ACK/NACK information of all subframes in the group is ACK, the bundled ACK/NACK information is ACK; when there are at least 1 NACK in the group, the bound ACK/NACK information is NACK; when the group contains a placeholder, DTX is output.
Claims (11)
1. A method of generating ACK/NACK information, comprising the steps of:
the number of downlink resources for the base station to transmit data to the user equipment is N ', N ' pieces of ACK/NACK information are provided aiming at the N ' downlink resources, the number of ACK/NACK bits transmitted in the uplink subframe is M,
when N '> ═ M, dividing N' downlink resources which send data into M groups, and binding and outputting 1 ACK/NACK or DTX information by each group of downlink resources;
the user equipment transmits ACK/NACK or DTX information in the uplink subframe.
2. The method of claim 1, wherein the N' downlink resources for transmitting data comprise placeholder downlink resources for indicating that the ue did not receive data but detected transmission of missing data.
3. The method of claim 2, wherein when a group contains placeholder downlink resources, the processed output information of the group of downlink resources is DTX.
4. The method according to claim 2, characterized in that for the placeholder downlink resources, the respective downlink resources that have sent data are sorted, all downlink resources that have sent dynamic data are sorted in front, and then the downlink resources that have sent semi-static data; or all downlink resources for transmitting the semi-static data are arranged in front of the uplink resources and then the downlink resources for transmitting the dynamic data are arranged.
5. The method of claim 1, wherein the number of downlink resources in each group differs by 1 or 0, and the number of downlink resources in a group is
Or
Wherein,
represents the lower rounding.
6. Method according to claim 5, characterized in that C is allocated first+Mod (N', M) contains K+A group of downlink resources, then allocate C-＝M-C+Each comprises K-A group of downlink resources.
7. The method according to claim 5, wherein N 'downlink resources that have transmitted downlink data have logical numbers N, N-0, 1, and N' -1, respectively, and the logical number of the downlink resource included in the mth group is defined to satisfy M-mod (N, M), M-0, 1, and.
8. A method of generating ACK/NACK information, comprising the steps of:
the number of downlink resources for the base station to transmit data to the user equipment is N ', N ' pieces of ACK/NACK information are provided aiming at the N ' downlink resources, the number of ACK/NACK bits transmitted in the uplink subframe is M,
when N '< M, for N' downlink resources which send data, the ACK/NACK or DTX information of each downlink resource is uniquely mapped to one of M ACK/NACK or DTX;
the user equipment transmits ACK/NACK or DTX information in the uplink subframe.
9. The method of claim 8, wherein the N' downlink resources for transmitting data comprise placeholder downlink resources for indicating missing data transmissions that are not received by the ue but can be detected.
10. The method of claim 8, when a group contains placeholder downlink resources, the processed output information of the group of downlink resources is DTX.
11. The method according to claim 8, characterized in that for placeholder downlink resources, the downlink resources that have sent data are sorted, all downlink resources that have sent dynamic data are sorted in front, and then downlink resources that have sent semi-static data; or all downlink resources for transmitting the semi-static data are arranged in front of the uplink resources and then the downlink resources for transmitting the dynamic data are arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810130802A CN101646237A (en) | 2008-08-05 | 2008-08-13 | Method for generating ACK/NACK information |
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| CN200810130802A CN101646237A (en) | 2008-08-05 | 2008-08-13 | Method for generating ACK/NACK information |
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| CN102237992A (en) * | 2010-04-30 | 2011-11-09 | 北京三星通信技术研究有限公司 | Method for feeding back data receiving status |
| WO2012019480A1 (en) * | 2010-08-13 | 2012-02-16 | Huawei Technologies Co., Ltd. | Arrangement and method for improving harq feedback in telecommunication systems |
| CN102870388A (en) * | 2010-07-07 | 2013-01-09 | Lg电子株式会社 | Method and apparatus for transmitting control information in a wireless communication system |
| CN102893551A (en) * | 2010-04-05 | 2013-01-23 | 高通股份有限公司 | Acknowledgement bundling in a mimo communication system |
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Open date: 20100210 |