WO2010069154A1

WO2010069154A1 - Method and device for transmitting feedback information

Info

Publication number: WO2010069154A1
Application number: PCT/CN2009/001511
Authority: WO
Inventors: 林亚男; 潘学明
Original assignee: 大唐移动通信设备有限公司
Priority date: 2008-12-19
Filing date: 2009-12-18
Publication date: 2010-06-24

Abstract

The present invention relates to the wireless communications technology, especially relates to a method and device for transmitting feedback information, and the present invention enables the feedback to be performed in an instance that the number of the uplink carriers is different from the number of the downlink carriers in the Long Term Evolution multi-carrier system. The method of the embodiment of the present invention includes the following steps: acknowledgement/negative acknowledgement (ACK/NACK) feedback information indicating whether the downlink sub-frame data needs retransmitting is generated after the user equipment finishes the demodulation and decoding of the downlink sub-frame data; all the determined feedback information is bundled; the bundled feedback information is transmitted through the uplink carrier. Using the method of the embodiment of the present invention, feedback can be improved in the instance that the number of the uplink carriers is different from the number of the downlink carriers, and the system efficiency can be improved.

Description

One . , ^ - , ,

a method of sending a feedback letter and straight

This application claims the Chinese patent application filed on December 19, 2008, the Chinese Patent Office, application number 200810240429.2, and the invention titled "Method and Equipment for Feedback ACK/NACK in Multi-Carrier Upgrade System", on December 29, 2008 Submitted to the Chinese Patent Office, application number 200810246770.9, the Chinese patent application entitled "Method and Equipment for Feedback ACK/NACK in Multi-Carrier Upgrade System" and submitted to China Patent Office on December 30, 2008, application number 200810247327.3 Priority of the Chinese patent application entitled "A Method and Apparatus for Sending Feedback Information".

The present invention relates to wireless communication technologies, and in particular, to a method and apparatus for transmitting feedback information. Background technique

For LTE-A (Long Term Evolution-Advanced) systems, to support a wider system bandwidth than LTE (Long Term Evolution) systems, such as 100 MHz, one may directly allocate 100M bandwidth. Figure 1A is a schematic diagram of a single-spectrum system, as shown in the figure; one possibility is to aggregate some of the spectrum allocated to the existing system and make it into a large bandwidth for use in the LTE-A system. Asymmetric configuration, that is, the user may occupy N ≥ 1 carriers for downlink transmission, M ≥ 1 carrier for uplink transmission, and N _≠ M , and FIG. 1B is a schematic diagram of uplink and downlink carriers of the spectrum aggregation system, as shown in the figure. When N > M, the same user needs to transmit feedback information on multiple downlink carriers in one uplink carrier.

Figure 1C and Figure 1D are data diagrams of the FDD (Frequency Division Duplex) and TDD (Time Division Duplex) systems respectively. The basic transmission scheme of the LTE system (R8), which has been basically completed by the standardization work, is shown. In the FDD system and the TDD system, for each working carrier, downlink signaling, downlink data, uplink signaling, and uplink data are respectively defined, and a transmission relationship between each other is required, where the uplink transmission needs to satisfy the single carrier characteristic. The two ends of the frequency band occupied by the uplink control signaling are transmitted in a frequency hopping manner. In two time slots in one subframe, the uplink control signaling will occupy different frequency bands for transmission.

When the HARQ (Hybrid Automatic Repeat Request) function is enabled in the downlink transmission, the user equipment (User Equipment) completes the demodulation and decoding of the data in the downlink subframe. In the uplink subframe "=, the base station feeds back to the base station whether the data on the downlink subframe needs to be retransmitted, that is, ACK/NACK (acknowledgment correct/confirm error), where ACK is represented by '1, and the data is correctly received at this time. , does not retransmit; NACK uses '0, indicates that the data is decoded incorrectly and needs to be retransmitted. For FDD systems, * = 4. For the TDD system, the values of the fC and the set are related to the uplink and downlink configuration of the system and the specific subframe number, as shown in Table 1.

Table 1: Downlink association set index K { > ^ , --k _M _ _x } _{for TDD} (TDD Downlink Association Setting Index)

The first subframe in the line frame "+1 is +1. Table 1 shows the case of each uplink subframe with only one radio frame as an example, where "-0" indicates the previous radio frame. Downstream subframe.

When performing multi-word (code word) transmission, the system multiplexes and transmits multiple streams of data belonging to the same user on the same physical resource by using spatial multiplexing technology. In a sub-frame, data on different data streams will be independently encoded into code words. The ACK/NACK information fed back at this time will be generated based on the codeword, that is, after decoding each codeword, a 1-bit independent ACK/NACK feedback will be obtained.

In LTE system, BPSK (Binary Phase Shift Keying) or QPSK (Quadra Phase Shift Keying) is used to modulate ACK/NACK feedback information and is limited to each uplink subframe. It can only carry at most one modulation symbol, which is processed into two single carriers after two spreading (first using a cyclic shift sequence to spread in the frequency domain and then using orthogonal sequences to spread in the time domain). After the signal is transmitted in the specified feedback channel, the ACK/NACK of multiple users in the cell is multiplexed on the same physical resource for transmission by code division.

For different systems and configurations (the ACK/NACK of multiple downlink subframes in the TDD system needs to be fed back in the same uplink subframe, as shown in Table 1), in order to guarantee ACK/NACK on each downlink subframe. A single carrier characteristic that can be transmitted without damaging the uplink transmission (currently, a terminal in an LTE system can only use a single carrier for uplink transmission), and multiple ACK/NACK feedback information needs to be combined (for example, multiple downlinks are used) The ACK/NACK on the subframe is merged into one ACK/NACK, and the ACK/NACK of multiple codewords in one downlink subframe is combined into one ACK/NACK. ₀ In order to ensure reliable detection performance of the feedback signaling, each The feedback information transmitted in one uplink subframe cannot exceed 2 bits, that is, the highest can only use QPSK modulation.

When the base station performs downlink control signaling transmission, each user is allocated a dedicated resource. However, for the feedback transmission of the uplink ACK/NACK, the user does not know the use of the channel by other users, in order to avoid resource conflicts during feedback, feedback is provided. The user equipment will calculate the resource (ie channel) number ("^) used for ACK/NACK feedback according to the resource number ( ⁿ cc _E ) of the downlink control signaling it receives, that is, "AN is a relevant" _CCE function "AN = f("ca + W , where N^ is high Layer configuration parameters, the function satisfies the one-to-one correspondence, that is, different mappings will result in different "^. In the current research on LTE-A systems, the LTE-A system will support terminals of multiple capability levels, for lower For a class of terminals, the uplink transmission may still support only a single carrier or its uplink can support a limited number of single carrier signals and less than the number of downlink available carriers.

When the user occupies a downlink carrier to transmit data and uses F carriers for uplink transmission, and each uplink carrier can transmit up to Z single carrier signals at the same time, and /(yz) = M > l, each downlink carrier The above data will be independently encoded, modulated, etc., that is, the user equipment will receive mutually independent data in parallel in one downlink subframe, and demodulate and decode the data separately, thereby generating an independent ACK/NACK feedback information, at this time, the user equipment needs to transmit this independent ACK/NACK simultaneously in each uplink carrier.

However, the shortcomings of the prior art are: For the case where the number of uplink and downlink carriers is not equal, the ACK/NACI^ feed has not yet formed a detailed implementation. Summary of the invention

A first object of the embodiments of the present invention is to provide a method and apparatus for transmitting feedback information, which can be used for feedback in a case where the number of uplink carriers and the number of downlink carriers are different in a long-term evolution multi-carrier system.

A second object of the embodiments of the present invention is to provide a method and an apparatus for transmitting feedback information, which are used to provide an ACK/NACBL feed implementation in a case where the number of uplink and downlink carriers in the long-term evolution multi-carrier upgrade system is not equal.

A third object of the embodiments of the present invention is to provide a method and apparatus for transmitting feedback information for implementing ACK/NACK feedback in which uplink transmission is not restricted by a single carrier in a long-term evolution multi-carrier upgrade system.

For the first purpose, the embodiment of the present invention provides a method for transmitting feedback information, including: after completing demodulation and decoding of data on a downlink subframe, generating signaling ACK for retransmission of data on the downlink subframe /NACK feedback information;

Merging all the determined feedback information;

The combined feedback information is sent through the uplink carrier.

For a first object, an embodiment of the present invention provides a user equipment, including:

a receiving processing module, configured to perform decoding processing on a codeword carried by a downlink subframe of each downlink carrier of the received multiple downlink carriers;

An information determining module, configured to determine, according to a result of the decoding process, feedback information corresponding to a codeword carried by each downlink subframe of each downlink carrier;

a processing module, configured to perform a merge process on all the determined feedback information;

The sending module is configured to send the combined feedback information by using an uplink carrier.

For the second purpose, the embodiment of the present invention provides a method for sending feedback information, including: after the user equipment completes demodulation and decoding of data on the downlink subframe, whether the data on the downlink subframe needs to be retransmitted. /NACK feedback information;

When the number of uplink carriers supported by the user equipment is less than the number of downlink carriers, the user equipment will be multiple. A one

Includes:

The user equipment obtains a channel number and a corresponding set of feedback information according to the feedback state on each carrier; and the channel corresponding to the channel number feeds back the group of feedback information to the base station.

For a second purpose, an embodiment of the present invention provides a user equipment, including:

a generating module, configured to: after performing demodulation and decoding on the downlink subframe, whether to generate ACK/NACK feedback information for whether the data in the downlink subframe needs to be retransmitted;

a multiplexing module, configured to multiplex multiple ACK/NACK feedback information in an uplink single carrier signal when the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, where the multiplexing includes: a feedback state, obtaining a channel number and a corresponding set of feedback information; feeding the group of feedback information to the base station corresponding to the channel number corresponding channel;

And a sending module, configured to transmit the single carrier signal to the base station.

For a second purpose, an embodiment of the present invention provides a base station, including:

a sending module, configured to send data on a downlink subframe;

The receiving module is configured to: when the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, receive ACK/NACK feedback information that needs to be retransmitted in the downlink subframe fed back by the user equipment; where, the user equipment uses multiple ACK/NACKs The feedback information is multiplexed in an uplink single carrier signal, and a channel number and a corresponding set of feedback information are obtained according to the feedback state on each carrier; and the group feedback information is fed back to the base station in the channel number corresponding channel.

For a third object, an embodiment of the present invention provides a method for transmitting feedback information, including: after completing demodulation and decoding of data on a downlink subframe, the user equipment feeds back to the base station on the downlink subframe in an uplink subframe. Whether the data needs to be retransmitted ACK/NACK feedback information;

The user equipment transmits multiple feedback channels to the base station simultaneously on one uplink subframe of one uplink carrier.

For a third object, an embodiment of the present invention provides a user equipment, including:

a downlink processing module, configured to demodulate and decode data on the downlink subframe;

And a retransmission feedback module, configured to: after the downlink processing module completes demodulation and decoding of data on the downlink subframe, feed back, in an uplink subframe, ACK/NACK feedback whether the data in the downlink subframe needs to be retransmitted in the uplink subframe Information; wherein, in one uplink subframe of one uplink carrier, multiple feedback channels are simultaneously transmitted to the base station.

For a third object, an embodiment of the present invention provides a base station, including:

a sending module, configured to send data on a downlink subframe;

a receiving module, configured to receive, on an uplink subframe, ACK/NACK feedback information that needs to be retransmitted on a downlink subframe that is fed back by the user equipment; where, multiple uplink feedback channels are simultaneously received in one uplink subframe of one uplink carrier ACK/NACK feedback information on.

For the first purpose, in a method and apparatus for transmitting feedback information provided by an embodiment of the present invention, in a long-term evolution multi-carrier system, feedback can be performed for a case where the number of uplink carriers and the number of downlink carriers are different, thereby improving the system. Efficiency, and the solution is simple and easy to implement. It is suitable for FDD systems and TDD systems, so it can be well compatible with LTE Release 8 systems.

For a second purpose, a method, system, and system for transmitting feedback information provided by an embodiment of the present invention Considering the consideration of compatible _LTE system, a method is proposed for the frequency-carrying aggregation system _A c _K. In the process of feeding back ACK/NACK in the long-term evolution multi-carrier upgrade system, the user equipment completes the downlink subframe. After the data is demodulated and decoded, the signaling ACK/NACK feedback information of the data in the downlink subframe needs to be retransmitted. When the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, the user equipment will have multiple ACK/NACKs. The feedback information is multiplexed and transmitted to the base station in an uplink single carrier signal, where the multiplexing includes: the user equipment obtains a channel number and a corresponding set of feedback information according to the feedback state on each carrier; The base station feeds back the feedback information of the group, so that the ACK/NACK feedback in the long-term evolution multi-carrier upgrade system is realized when the number of uplink and downlink carriers is not equal.

For a third object, a method, system, and apparatus for transmitting feedback information provided by an embodiment of the present invention, after completing demodulation and decoding of data on a downlink subframe, the user equipment feeds back to the base station in an uplink subframe. Whether the data on the downlink subframe needs to be retransmitted signaling ACK/NACK; wherein, the user equipment transmits multiple feedback channels to the base station in one uplink subframe of one uplink carrier; thereby implementing the long-term evolution multi-carrier upgrade system In the uplink transmission, the ACK/NACK feedback is not limited by the single-carrier limitation. This scheme is simple and easy to implement. It is applicable to both FDD and TDD systems, which not only improves the system performance of the long-term evolution multi-carrier upgrade system, but also can be very good. Compatible with LTE Release 8 systems. DRAWINGS

1A is a schematic diagram of a single spectrum system in the background art;

1B is a schematic diagram of uplink and downlink carriers of a spectrum aggregation system in the background art;

1C is a schematic diagram of data of an FDD system in the background art;

1D is a schematic diagram of data of a TDD system in the background art;

2 is a schematic structural diagram of a user equipment for a first destination according to an embodiment of the present invention;

3A is a schematic diagram of time domain merging of a single codeword for a first purpose according to an embodiment of the present invention;

FIG. 3B is a schematic diagram of time domain merging of two codewords for a first purpose according to an embodiment of the present invention; FIG.

FIG. 4A is a schematic diagram 1 of time domain merging for a first purpose according to an embodiment of the present invention; FIG.

FIG. 4B is a schematic diagram 2 of time domain merging for a first purpose according to an embodiment of the present invention; FIG.

4C is a schematic diagram of frequency domain merging of single codewords for the first purpose of the present invention;

4D is a schematic diagram of frequency domain merging of two codewords for a first purpose according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for transmitting feedback information for a first object according to an embodiment of the present invention; FIG. 6 is a schematic diagram 1 for performing feedback on a first-purpose FDD system according to an embodiment of the present invention; FIG. 7 is a first-purpose FDD for an embodiment of the present invention. FIG. 8 is a schematic diagram 3 of feedback for a first-purpose FDD system according to an embodiment of the present invention; FIG. 9 is a schematic diagram of feedback for a first-purpose TDD system according to an embodiment of the present invention; FIG. FIG. 11 is a schematic diagram of a codeword merging on a downlink subframe 1-4 for a second purpose according to an embodiment of the present invention; FIG. 12 is a second destination user equipment according to an embodiment of the present invention; Schematic;

FIG. 13 is a schematic structural diagram of a base station for a second destination according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a long-term evolution multi-carrier upgrade system for a second object according to an embodiment of the present invention; Figure

FIG. 15 is a schematic diagram of a frequency hopping distribution of a feedback channel for a third object according to an embodiment of the present invention; FIG. 16 is a schematic structural diagram of a user equipment for a third destination according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a retransmission feedback module for a third object according to an embodiment of the present invention; FIG. 18 is a schematic structural diagram of a base station for a third destination according to an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of a long-term evolution multi-carrier upgrade system for a third object according to an embodiment of the present invention. detailed description

The embodiments of the present invention for the first to third purposes can be applied to a long-term evolution multi-carrier system, and can also be applied to other systems that need to send feedback information. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, the user equipment for the first destination of the embodiment of the present invention includes: a receiving processing module 10, an information determining module 20, a processing module 30, and a sending module 40.

The receiving processing module 10 is configured to perform decoding processing on the codeword carried by the downlink sub-frame of each downlink carrier of the received multiple downlink carriers.

If the downlink subframe of the downlink carrier carries two data streams, respectively, two codewords (codeword 1 and codeword 2) in each data stream are decoded.

The received multiple downlink carriers may be multiple received downlink carriers within a set period of time; or may be multiple downlink carriers received simultaneously.

The information determining module 20 is configured to determine, according to a result of the decoding process of the receiving processing module 10, feedback information corresponding to a codeword carried by each downlink subframe of each downlink carrier.

If the decoding processing module 10 successfully decodes the codeword, the feedback information corresponding to the codeword is ACK. Correspondingly, if the decoding processing module 10 fails to decode the codeword, the feedback information corresponding to the codeword is NACK. :.

If two codewords are carried in the downlink subframe, the downlink subframe has two feedback information. The processing module 30 is configured to perform a combining process on all the feedback information determined by the information determining module 20. The sending module 40 is configured to send the feedback information processed by the processing module 30 through the uplink carrier.

There are many ways for the processing module 30 to combine the feedback information. Regardless of the combination method, the following merge processing rules are required:

1. The feedback information after the merge processing can only have two states: ACK, NACK;

2. When the feedback information of the merge processing is all ACK, the feedback information after the merge processing is ACK;

3. The feedback information of the merge processing is all NACK, and when the set number of retransmissions is not reached, the feedback information after the merge processing is NACK.

If the part of the feedback information for the merge processing is ACK and the part is NACK, the feedback information after the merge processing is selected as ACK or NACK: as needed.

For example, if the feedback information for the merge processing is not all ACK, and the set number of retransmissions is not reached, the feedback information after the merge processing is NACK; ^ ^ , ^ , , „ - , It can also be agreed that when the ACK number of the feedback information for the merge processing is not less than NACK, the feedback information after the merge processing is ACK, and the number of ACKs of the feedback information when the merge processing is performed is smaller than NACK. When the set number of retransmissions is not reached, the feedback information after the merge processing is NACK.

It should be noted that the part of the feedback information for the merging process is ACK, and the part is the case of NACK, and is not limited to the above-mentioned several processing methods, as long as the manner of finally determining the content of the feedback information after the merging process is applicable. Example.

The following methods are combined in time domain merging, frequency domain merging, first time domain merging, frequency domain merging, frequency domain merging, time domain merging, first time domain merging, frequency domain multiplexing, and frequency domain merging. The six ways of multiplexing are described separately.

If the manner of the merge process is time domain bundling, the processing module 30 may further include: a first grouping module 300 and a first merge processing module 310.

The first grouping module 300 is configured to group downlink subframes of all downlink carriers, and the downlink subframes in each group are downlink subframes in the same downlink carrier.

Here, the downlink subframes in the same downlink carrier are grouped into one group. If there are X downlink carriers, the corresponding ones are divided into X groups.

The first merging processing module 310 is configured to perform merging processing on the feedback information corresponding to the codewords carried by the downlink sub-frames in each group to obtain feedback information of each group corresponding to the combined processing.

Here, the feedback information corresponding to the codeword carried by the downlink subframe in the group may be logically “added” to obtain a group of feedback information corresponding to one downlink carrier; if there are X downlink carriers, the X group feedback is obtained. information.

Of course, other merge processing methods can also be used, but the requirements of the merge processing rules must be guaranteed.

Let Q be the maximum number of codewords transmitted in M subframes in the downlink carrier, where e {0, l, ..., -l}, then Q combined ACK/NACK will be obtained on each downlink carrier. (ie bi). Referring to FIG. 3A, C _M combined ACK/NACKs (ie, b ₀ ) will be obtained on each downlink carrier.

If a group has a downlink subframe that carries multiple codewords, that is, if the downlink subframe carries multiple data streams, then a plurality of codewords corresponding to one downlink subframe are processed, A merge processing module 310 combines the feedback information corresponding to the codewords of the same codeword number in a group.

For example, if the downlink subframe carries two data streams, the two codewords corresponding to one downlink subframe (ie, codeword 1 and codeword 2) are processed, and in one group, the codes of all codewords 1 are The feedback information corresponding to the words is combined, and the feedback information corresponding to the code words of all the code words 2 are combined, so that one group obtains two combined ACK/NACKs (ie, bo sum), see FIG. 3B.

If not all the downlink subframes in a group have two codewords, the merge processing is the same as that in Figure 3B, except that the number of feedback information in ^ and ^ participating in the merge is different.

If the manner of the merge processing is frequency domain combining, the processing module 30 may further include: a second grouping module 320 and a second combining processing module 330.

The second grouping module 320 is configured to group downlink subframes of all downlink carriers, and the subframe numbers of the downlink subframes in each group are the same.

Here, the downlink subframes with the same subframe number in all downlink carriers are grouped into one group. , — _k , , , person , , ,

Load ¹ 3⁄4" X sub-frames, and the phase will be divided into X groups.

The second merging processing module 330 is configured to perform merging processing on the feedback information corresponding to the codewords carried by the downlink sub-frames in each group to obtain feedback information of each group corresponding to the combined processing.

For the frequency domain merge mode, three more ways are listed here.

The first mode: the second merge processing module 330 separately combines the feedback information corresponding to the codewords carried by all the downlink subframes in each group, and obtains the feedback information of each group corresponding to the combined processing, if the downlink sub If the frame carries multiple codewords, the feedback information corresponding to the multiple codewords carried by the downlink subframe is combined in the following subframes. (If no downlink subframe carries multiple codewords, the step does not need to be performed. And then combining the feedback information corresponding to the codewords carried by all the downlink subframes in each group.

Referring to FIG. 4A, it is assumed that the corresponding downlink subframe number of the group is 3, and there are a total of one downlink carrier. If some downlink subframes carry two codewords, the codeword 1 and the codeword 2 are first combined, and then The feedback information corresponding to the downlink subframe in which the downlink subframe number of the first to the second downlink carriers is 3 is combined to obtain an ACK/NACK (ie, b ₀ ).

The second mode: the second merge processing module 330 determines at least one downlink subframe in each group, and performs combining processing on the feedback information corresponding to the codewords carried in the determined downlink subframe, and the remaining downlink subframes in each group. The feedback information corresponding to the carried codeword is combined and processed.

Specifically, if the downlink subframe carries multiple codewords, the following downlink subframes are used as a unit, and the feedback information corresponding to the multiple codewords carried by the downlink subframe is combined (if no downlink subframe carries multiple codewords, Then, the step is not performed, and then a part of the downlink subframes in each group are determined, and the feedback information corresponding to the codewords carried by the downlink subframes is combined, and then the codewords carried by the remaining downlink subframes in each group are performed. The corresponding feedback information is merged, so that two sets of combined feedback information are obtained in one group.

Referring to FIG. 4B, the corresponding downlink subframe number of the group is set to 3, and there are a total of N downlink carriers. If some downlink subframes carry two codewords, the codeword 1 and the codeword 2 are first combined, and then The feedback information corresponding to the downlink subframe in which the downlink subframe number of the first to the L^/th downlink carriers is 3 is combined to obtain an ACK/NACK (ie, ^δ .), and the LW ² +1 + 1 to the first The feedback information corresponding to the downlink subframe with the downlink subframe number 3 in the N downlink carriers is combined to obtain one

ACK/NACK (ie), such a group will get two combined ACK/NACK (ie b ₀ and b!).

The third mode: The second merge processing module 330 combines the feedback information corresponding to the codewords of the same codeword number in a group. -, . , .„ ^ ₇ κ ^ L ~ - ^ -^ k ^ In common, if there is no downlink subframe in which a plurality of codewords are carried in a group, the label of the codeword is considered to be 1, Then, the feedback information corresponding to all code words in a group is combined.

Referring to FIG. 4C, the corresponding downlink subframe number of the group is set to 3, and a total of N downlink carriers are used, and the downlink subframe number of the first to the second downlink carriers is 3 corresponding to the downlink subframe. The feedback information is combined to obtain an ACK/NACK (ie, b ₀ ).

If a group has a downlink subframe that carries multiple codewords, that is, if the downlink subframe carries multiple data streams, then one downlink subframe corresponds to multiple codewords, and then the second The merge processing module 330 combines the feedback information corresponding to the codewords of the same codeword number in a group.

Referring to FIG. 4D, it is assumed that the corresponding downlink subframe number of the group is 3, and there are a total of N downlink carriers, and the codewords of all codewords 1 of the downlink subframes of the first to the second downlink carriers are numbered to 3. The feedback information is combined to obtain an ACK/NACK (ie, b.), and the feedback information corresponding to the codewords of all codewords 2 of the downlink subframe number 3 of the 1st to the Wth downlink carriers is combined and processed. An ACK/NACK (ie), such a group will get two combined ACK/NACK (ie ^ and ^).

If the merge processing is performed by the first time domain merge and the frequency domain merge, the first merge processing module 310 performs the time domain merge processing, and then combines the obtained merged processed feedback information for each group.

Specifically, after the time domain processing is completed, multiple feedback information is obtained (one to two feedback information for each group), and then multiple feedback information are combined, so that a combined processing feedback information is obtained.

Here, a plurality of feedback information after the time domain processing is completed can be logically "added" to obtain a feedback information after the merge processing.

If the merging process is the first frequency domain merging and the time domain merging, the second merging processing module 330 performs the merging process after the time domain merging process, and then combines the obtained merged processed feedback information for each group.

Specifically, after the frequency domain processing is completed, multiple feedback information is obtained (one to two feedback information for each group), and then multiple feedback information are combined, so that a combined processing feedback information is obtained.

If the merging process is the first time domain merging and the frequency domain multiplexing, the first merging processing module 310 performs the merging process on the feedback information corresponding to the codewords carried in the downlink subframes in each group, and then sends the module 40. Before the feedback information is sent, the obtained combined feedback information of each group is subjected to frequency domain multiplexing processing to obtain a feedback signal.

There are many ways to reuse the frequency domain. In either case, the following rules for frequency domain multiplexing are required: _L , , , ,

1. The feedback signal generated by frequency domain multiplexing must have a single carrier characteristic (ie, the reverse signal occupies a single carrier frequency band);

2. It is necessary to ensure that the base station has reliable detection performance for the feedback signal (for example, adopting a low-order modulation mode), that is, ensuring that the uplink feedback transmission has similar coverage with the current data transmission (ie, the user equipment can be located anywhere in the cell. Sending a feedback signal to the base station);

3. Ensure that the base station can detect feedback information (ie, AC/NACK) on multiple downlink carriers according to the feedback signal.

For example, in frequency domain multiplexing, ACK/NACK on multiple carriers can be regarded as ACK/NACK on an atomic frame.

If the merging process is the first frequency domain merging and the time domain multiplexing, the second merging processing module 330 performs the merging process on the feedback information corresponding to the codewords carried by the downlink subframes in each group, and then the sending module 40 Before the feedback information is sent, the obtained combined feedback information of each group is subjected to frequency domain multiplexing processing to obtain a feedback signal.

There are many ways to reuse the time domain. Either way, you need to ensure the following rules for time domain multiplexing:

1. The feedback signal generated by time domain multiplexing must have a single carrier characteristic (ie, the feedback signal occupies a single carrier frequency band);

3. Ensure that the base station can detect feedback information (ie, ACK/NACK) on multiple downlink carriers according to the feedback signal.

If the method of performing the merging process is the time domain merging, the sending module 40 sends the feedback information of the corresponding merged processing in each group through consecutive uplink subframes of the uplink carrier, where a corresponding group of the combined processed feedback information is uplinked. An uplink subframe of the carrier is transmitted.

If the mode of the merging process is the frequency domain merging, the sending module 40 sends the feedback information of the corresponding merged processing in each group through the uplink subframe of the uplink carrier, where a corresponding set of the combined processed feedback information passes the uplink carrier. An uplink subframe is sent.

If the merging process is the first time domain merging and the frequency domain merging, the sending module 40 sends the combined feedback information through consecutive uplink subframes of the uplink carrier.

The feedback information after the merge processing is sent by using one uplink subframe of the uplink carrier.

Since one uplink subframe can carry 2 bits of data, all of them can be transmitted through one uplink subframe for bo and (1⁄4 and ^1 each).

In a specific implementation process, the sending module 40 first converts the combined feedback information into a feedback signal.

There are many ways to convert feedback information into feedback signals. Either way, you need to guarantee the following conversion processing rules:

1. The feedback signal after the conversion process has a single carrier characteristic (ie, the feedback signal occupies a single carrier frequency band);

2. It is necessary to ensure that the base station has reliable detection performance for the feedback signal (for example, using a low-order modulation side) That is, the uplink feedback transmission is guaranteed to have a similar coverage SJ as the current data transmission (ie, the user equipment can transmit the feedback signal to the base station regardless of the location in the cell).

For example, the feedback information may be BPSK-modulated or QPSK-modulated to obtain a modulation symbol, and the modulation symbol is spread twice (first using a cyclic shift sequence to spread in the frequency domain, and then using an orthogonal sequence in the time domain). After performing the spread spectrum processing, it becomes a single carrier broadcast signal (ie, a feedback signal).

The sending module 40 determines the downlink subframe corresponding to the feedback information after the merge processing, and the feedback information after the merge processing is obtained by combining the feedback information corresponding to the multiple downlink subframes, so the feedback information after the merge processing is correspondingly Downstream subframes.

The sending module 40 determines the feedback channel in the uplink subframe corresponding to the downlink subframe, so as to determine the feedback channel in the uplink subframe corresponding to the feedback signal converted by the combined processing feedback information.

Each downlink subframe corresponds to a feedback channel, so that the feedback information for the combining process corresponds to multiple feedback channels. At this time, a feedback channel can be randomly selected or a feedback channel can be selected according to a preset selection basis. Set as needed).

For the FDD system, since the number of uplink subframes and downlink subframes in the system is the same, each downlink subframe can be found with an uplink subframe corresponding thereto, and then corresponding feedback is determined from the determined uplink subframe. channel;

For the TDD system, since there are multiple configuration ratios of the uplink subframe and the downlink subframe, the uplink subframe corresponding to each downlink subframe needs to be determined according to Table 1, and then the corresponding uplink subframe is determined. Feedback channel.

The transmitting module 40 finally transmits the feedback signal through the feedback channel in the determined uplink subframe.

If the merging process is first time domain merging and then frequency domain merging, the sending module 40 determines, according to the correspondence between the content of the feedback information and the feedback channel in the uplink subframe, the uplink corresponding to the content of the feedback information after the merging process. The feedback channel of the subframe.

Since one uplink subframe can carry 2-bit data, all for ^ and ^ (!^ and !^ each are 1 bit) can be transmitted through one uplink subframe.

In a specific implementation process, the feedback channel of the uplink subframe corresponding to the content of the merged feedback information is determined according to the number of the downlink carriers and the correspondence between the content of the feedback information and the feedback channel in the uplink subframe.

The correspondence between the number of downlink carriers, the content of the feedback information, and the feedback channel in the uplink subframe may be preset according to requirements. Correspondingly, after receiving the feedback information, the base station first determines which feedback channel is received, and then determines whether the content of the feedback information is combined with the feedback channel in the uplink subframe according to the content of the feedback information. Need to retransmit. The following is a description of the 2-bit feedback information (ie, b(0) and b(l)), and " ^UL ' ^W is the feedback channel number.

Table 2, Table 3, and Table 4 show the correspondence between the content of the feedback information and the feedback channel when the number of downlink carriers is 2, 3, and 4, respectively.

ACK, NACK/DTX (indicating that no information is detected) "UL,0 0,1

NACK/DTX, ACK "UL,1 0,0

NACK/DTX, NACK "UL,1 1,0

NACK, DTX "UL,0 1,0

DTX, DTX N/A N/A Table 2 The number of downlink carriers is 2

Downstream wave 1, down plant 3⁄4iL2, down stream 3

ACK, ACK, ACK "UL, 2 1,1

ACK, ACK, NACK/DTX "UL,1 1,1

ACK, NACK/DTX, ACK "UL, 0 U

ACK, NACK/DTX, NACK/DTX "UL,0 0,1

NACK/DTX, ACK, ACK "UL, 2 1,0

NACK/DTX, ACK, NACK/DTX "UL,1 0,0

NACK/DTX, NACK/DTX, ACK ⁿ UL, 2 0,0

DTX, DTX, NACK "UL, 2 0,1

DTX, NACK, NACK/DTX "UL,1 1,0

NACK, NACK/DTX, NACK/DTX "UL,0 1,0

DTX, DTX, DTX N/A N/A Table 3 The number of downlink waves is 3

Downstream wave 1, down ifc2, down plant 3⁄43, down stream 4 ⁿ \JL, m 6(0)^(1)

ACK, ACK, ACK, ACK "UU 1,1

ACK, ACK, ACK, NACK/DTX "UW 1,0

NACK/DTX, NACK/DTX, NACK, DTX ⁿ UL, 2 1,1

ACK, ACK, NACK/DTX, ACK "UL,1 1,0

NACK, DTX, DTX, DTX "UL,0 1,0

ACK, ACK, NACK/DTX, NACK/DTX "UL,1 1,0

ACK, NACK/DTX, ACK, ACK "UL, 3 0,1

NACK/DTX, NACK/DTX, NACB/DTX, NACK "UL,3 1,1

ACK, NACK/DTX, ACK, NACK/DTX ⁿ Uh, 2 0,1

ACK, NACK/DTX, NACK/DTX, ACK ^UL, 0 0,1

ACK, NACK/DTX, NACK/DTX, NACK/DTX "UL,0 1,1

NACK/DTX, ACK, ACK, ACK "UL, 3 0,1

NACK/DTX, NACK, DTX, DTX "UL,1 0,0

NACK/DTX, ACK, ACK, NACK/DTX "UL, 2 1,0

NACK/DTX, ACK, NACK/DTX, ACK "UL,3 1,0

NACK/DTX, ACK, NACK/DTX, NACK/DTX "UL,1 0,1

NACK/DTX, NACK/DTX, ACK, ACK "UL, 3 0,1

It should be noted that if the method of combining processing is the first frequency domain combining and then the time domain combining, it seems that only the number of downlink waves in Table 2 to Table 4 is the subframe number of the downlink subframe, and no longer Narration.

As shown in FIG. 5, the method for sending feedback information for the first purpose in the embodiment of the present invention includes the following steps:

Step 500: Decode a codeword carried in a downlink subframe of each downlink carrier of the received multiple downlink carriers.

Step 501: Determine, according to a result of the decoding process, feedback information corresponding to a codeword carried by each downlink subframe of each downlink carrier.

Step 502: Perform a combining process on all the determined feedback information.

If the decoding of the codeword is successful in step 501, the feedback information corresponding to the codeword is ACK. Correspondingly, if the decoding of the codeword fails in step 501, the feedback information corresponding to the codeword is NACK. .

If two codewords are carried in the downlink subframe, the downlink subframe has two feedback information. Step 503: Send the combined feedback information by using an uplink carrier.

In step 502, there are multiple ways to combine the feedback information, and the following merge processing rules need to be guaranteed regardless of the combination mode:

If the part of the feedback information for the merge processing is ACK and the part is NACK, the feedback information after the merge processing is selected as ACK or NACK as needed.

For example, if the feedback information for the merge processing is not all ACK, and the set number of retransmissions is not reached, the feedback information after the merge processing is NACK;

It is also possible to set that when the number of ACKs of the feedback information to be merged is not less than NACK, the feedback information after the merge processing is ACK, and the number of ACKs of the feedback information subjected to the merge processing is less than NACK, and the set number of retransmissions is not reached. When the merged processing feedback information is NACK.

It should be noted that the part of the feedback information for the merging process is ACK, and the part is the case of NACK, and is not limited to the above-mentioned several processing methods, as long as the merging process can be finally determined. The manner in which the content of the information is fed back applies to this embodiment.

If the merging process is a time domain merging, the step 502 may further include: Step a502: grouping downlink subframes of all downlink carriers, where downlink subframes in each group are downlinks in the same downlink carrier frame.

In step b502, the feedback information corresponding to the codewords carried by the downlink subframes in each group is combined and processed, and the feedback information after the combination processing is obtained.

Let Q be the maximum number of codewords transmitted in M subframes of the downlink carrier, where 6 {0,1,..., -1}, then each merged wave will get _Ci combined ACK/ NACK (ie bi). Referring to FIG. 3A, C _M combined ACK/NACKs (ie, b ₀ ) will be obtained on each downlink carrier.

If a group has a downlink subframe that carries multiple codewords, that is, if the downlink subframe carries multiple data streams, then a plurality of codewords corresponding to one downlink subframe are processed, and step b502 In the middle, the feedback information corresponding to the codewords of the same codeword number in a group is combined.

For example, if the downlink subframe carries two data streams, the two codewords corresponding to one downlink subframe (ie, codeword 1 and codeword 2) are processed, and in one group, the codes of all codewords 1 are The feedback information corresponding to the words is combined, and the feedback information corresponding to the code words of all the code words 2 are combined, so that one group obtains two combined ACK/NACKs (ie, !^ and b!), see FIG. 3B.

If not all downlink subframes in a group have two codewords, the merge processing is the same as that in Figure 3B, except that the number of feedback information involved in the merge is different.

If the merging process is a frequency domain merging, the step 502 may further include: Step c502: Grouping downlink subframes of all downlink carriers, where the subframe numbers of the downlink subframes in each group are the same.

Here, the downlink subframes with the same subframe number in all downlink carriers are grouped into one group. If there are X subframes in the downlink carrier, the corresponding subframes are divided into X groups.

In step d502, the feedback information corresponding to the codewords carried by the downlink subframes in each group is combined and processed, and the feedback information after the combination processing of each group is obtained.

Of course, other merge processing methods can also be used, but it must be guaranteed that the merge processing rules are met. ,

begging.

In step d502, three ways are listed for the frequency domain combining mode.

The first method is: combining the feedback information corresponding to the codewords carried by all the downlink subframes in each group to obtain the feedback information of each group corresponding to the combined processing.

Specifically, if the downlink subframe carries multiple codewords, the following downlink subframes are used as a unit, and the feedback information corresponding to the multiple codewords carried by the downlink subframe is combined (if there is no downlink subframe to bear multiple codes) The word does not need to be executed. Then, the feedback information corresponding to the codewords carried by all the downlink subframes in each group is combined.

Referring to FIG. 4A, the corresponding downlink subframe number of the group is set to 3, and there are a total of N downlink carriers, and some downlink subframes carry two codewords, and then the codeword 1 and the codeword 2 are first combined. Then, the feedback information corresponding to the downlink subframe in which the downlink subframe number of the first to the second downlink carriers is 3 is combined to obtain an ACK/NACK (ie, b ₀ ).

The second mode is: determining at least one downlink subframe in each group, performing combining processing on the feedback information corresponding to the codewords carried in the determined downlink subframe, and corresponding to the codewords carried in the remaining downlink subframes in each group. The feedback information is merged.

Specifically, if the downlink subframe carries multiple codewords, the following downlink subframes are used as a unit, and the feedback information corresponding to the multiple codewords carried by the downlink subframe is combined (if no downlink subframe carries multiple codewords) Then, the step is not performed, and then a part of the downlink subframes in each group are determined, and the feedback information corresponding to the codewords carried by the downlink sub-frames is combined, and then the code of the remaining downlink subframes in each group is carried. The feedback information corresponding to the word is merged, so that the feedback information after the two merged processing is obtained in one group.

Referring to FIG. 4B, the corresponding downlink subframe number of the group is set to 3, and there are a total of N downlink carriers. If some downlink subframes carry two codewords, the codeword 1 and the codeword 2 are first combined, and then Will be 1st to the first! The feedback information corresponding to the downlink subframe with the downlink subframe number 3 in the "^ ² " downlink carriers is combined to obtain an ACK/NACK (ie, ⁶ ), and the LW ² +1 + 1 to the Nth downlink carrier are obtained. The feedback information corresponding to the downlink subframe in which the downlink subframe number is 3 is combined to obtain an ACK/NACK (ie,), so that one group obtains two combined ACK/NACKs (ie, b ₀ and the third type). Method: Combine the feedback information corresponding to the codewords of the same codeword number in a group. Specifically, if there is no downlink subframe that carries multiple codewords in a group, all the codewords are considered to be 1 Combine the feedback information corresponding to all codewords in a group.

Referring to FIG. 4C, assuming that the downlink subframe number corresponding to the group is 3, and there are a total of N downlink carriers, the feedback information corresponding to the downlink subframe number of the downlink subframe number 3 in the first to the second downlink carriers is performed. The merge process yields an ACK/NACK (ie b ₀ ) „

If a downlink subframe that carries multiple codewords is in a group, that is, if the downlink subframe carries multiple data streams, then a plurality of codewords corresponding to one downlink subframe are processed, and step d502 In the middle, the feedback information corresponding to the codewords of the same codeword number in a group is combined.

Referring to FIG. 4D, it is assumed that the corresponding downlink subframe number of the group is 3, and there are a total of N downlink carriers. The feedback information corresponding to the code 所有 of all codewords 1 of the downlink subframe number 3 in the first to the second downlink carriers is combined to obtain one ACK/NACK (ie, bo), and the first to the Wth downlinks are obtained. The feedback information corresponding to the codewords of all codewords 2 of the downlink subframe number 3 in the carrier is combined to obtain an ACK/NACK (ie, 1^), so that one group obtains two combined ACK/NACKs ( That is bc^ b!).

If the merging process is the first time domain merging and the frequency domain merging, in step b502, after the time domain merging process is performed, the obtained combined feedback information of each group is again merged.

If the merging process is the first frequency domain merging and the time domain merging, in step d502, after the time domain merging process is performed, the obtained combined feedback information of each group is again merged.

If the merging process is the first time domain merging and the frequency domain multiplexing, in step b502, after the feedback information corresponding to the codewords carried in the downlink subframes in each group is separately processed, each group obtained is obtained. The corresponding merged feedback information is subjected to frequency domain multiplexing processing to obtain a feedback signal.

There are many ways to multiplex the frequency domain. In either case, the rules for the frequency domain multiplexing are required. For details, refer to the corresponding content of the user equipment for the first destination in the embodiment of the present invention.

If the merging process is the first frequency domain combining and the time domain multiplexing, in step d502, after the feedback information corresponding to the codewords carried in the downlink subframes in each group is separately processed, each group obtained is obtained. The corresponding merged feedback information is subjected to frequency domain multiplexing processing to obtain a feedback signal.

There are many ways to multiplex the time domain. In either case, the rules of the time domain multiplexing are required. For details, refer to the corresponding content of the user equipment for the first destination in the embodiment of the present invention.

If the merging process is time domain merging, in step 503, the feedback information of each group of the combined processing is sent through consecutive uplink subframes of the uplink carrier.

Wherein, a group of corresponding merged feedback information passes through an uplink subframe of the uplink carrier Send.

If the merging process is the frequency domain merging, in step 503, the feedback information of each group of the combined processing is sent through the uplink subframe of the uplink carrier.

The feedback information of a corresponding group of combined processing is sent by using one uplink subframe of the uplink carrier.

If the merging process is the first time domain merging and the frequency domain merging, in step 503, the merging feedback information is sent through consecutive uplink subframes of the uplink carrier.

Since one uplink subframe can carry 2 bits of data, all for ^ and ^ (and ^ 1 bits each) can be transmitted through one uplink subframe.

Specifically, step 503 may further include:

Step a503: First, converting the combined feedback information into a feedback signal.

There are many ways to convert the feedback information into the feedback signal. In either case, the conversion processing rule needs to be guaranteed. For details, refer to the corresponding content of the user equipment for the first destination in the embodiment of the present invention.

Step b503: Determine a downlink subframe corresponding to the feedback information after the merge processing.

Since the feedback information after the merge processing is obtained by combining the feedback information corresponding to the plurality of downlink subframes, the feedback information after the merge processing corresponds to the plurality of downlink subframes.

In step c503, the feedback channel in the uplink subframe corresponding to the downlink subframe is determined, so that the feedback channel in the uplink subframe corresponding to the feedback signal converted by the combined feedback feedback information is determined.

For the TDD system, since there are multiple configuration ratios of the uplink subframe and the downlink subframe, the uplink subframe corresponding to each downlink subframe needs to be determined according to Table 1, and then the corresponding feedback channel is determined from the determined uplink subframe. .

Step d503: Send a feedback signal by using a feedback channel in the determined uplink subframe.

Corresponding relationship, determining the feedback channel of the uplink frame corresponding to the content of the feedback information after the merge processing

Since one uplink subframe can carry 2 bits of data, all for b. And ^ (!^ and ^ are each

1 bit) can be transmitted through one uplink subframe.

Specifically, in step 503, the feedback channel of the uplink subframe corresponding to the content of the combined feedback information is determined according to the number of the downlink carriers and the correspondence between the content of the feedback information and the feedback channel in the uplink subframe.

Wherein, the number of downlink carriers, the content of the feedback information, and the pair of feedback channels in the uplink subframe , , should be pre-set as needed. Correspondingly, after receiving the feedback information, the base station first determines which feedback channel is received, and then determines whether the content of the feedback information is combined with the feedback channel in the uplink subframe according to the content of the feedback information. Need to retransmit. The following is a description of the 2-bit feedback information (ie, b(0) and b(l)), and " ^UL ' ^W is the feedback channel number.

Table 2, Table 3 and Table 4 show the correspondence between the content of the feedback information and the feedback channel when the number of downlink carriers is 2, 3 and 4.

It should be noted that, if the method for performing the merge processing is the first frequency domain combining and the time domain combining, the processing manner in step 503 is similar to the processing manner of the first time domain combining and the frequency domain combining described above, except that the table 2 ~ table The number of the downlink carriers in the downlink subframe is the subframe number of the downlink subframe, and details are not described herein again.

As shown in FIG. 6, in the first schematic diagram of the feedback of the first-purpose FDD system, the ACK/NACK on the M consecutive downlink subframes in each downlink carrier is time-domain merged.

The last subframe number of the M consecutive downlink subframes in the time domain combining is "", and the minimum processing delay required by the base station to receive the uplink feedback signal to perform retransmission transmission is one subframe length (in LTE Release) 8 = 4), then:

The feedback information on the same carrier wave is modulated to obtain a modulation symbol, and the modulation symbol is processed by two times of spreading, and becomes a single carrier signal;

The feedback information on the ₍ ^ {0,1,',',N-1}) downlink carriers will be transmitted on the uplink subframe "+ Γ.

The channel number used for the transmission may be bound to the downlink control signaling resource number of the user equipment in the first subframe actually used by the user equipment in the M subframes that are combined in the time domain, so the feedback signal of the downlink carrier 0 is It is transmitted on the uplink subframe n+T of the uplink carrier.

Similarly, the feedback signal of the downlink carrier Ν-1 is transmitted on the uplink subframe (η+Τ+Ν-l) of the uplink carrier.

It should be noted that the manner in which the TDD system performs feedback is similar to the manner in which the FDD system in FIG. 6 performs feedback, and details are not described herein again.

As shown in FIG. 7, in the second schematic diagram of the feedback of the first-purpose FDD system, the ACK/NACK on the W downlink carriers in the same downlink subframe is frequency-domain combined.

Let the downlink subframe number be ", then, the feedback information on the same subframe is modulated to obtain a modulation symbol, and the modulation symbol is processed by two spreading, and becomes a single carrier signal;

The feedback information on the downlink subframe will be transmitted on the uplink subframe.

The channel number used for the transmission may be bound to the downlink control signaling resource number of the user equipment that is actually used by the user equipment in the N carriers that are combined in the frequency domain, so the feedback signal of the downlink subframe n is It is transmitted on the uplink subframe n+T of the uplink carrier.

Similarly, the feedback signal of the downlink subframe n+1 is transmitted in the uplink subframe (n+T+1) of the uplink carrier.

It should be noted that the manner in which the TDD system performs feedback is similar to the manner in which the FDD system in FIG. 7 performs feedback, and details are not described herein again.

As shown in FIG. 8, FIG. 3 is a schematic diagram of feedback for the first-purpose FDD system according to an embodiment of the present invention. , , in, for each downlink carrier, ACK/NACK on the consecutive downlink subframes is time-domain merged, j_l<<N _o

Then, the ACK/NACK on the downlink carriers are divided into M groups in order, and the number of ACK/NACKs in each group is:

ί L remaining ^{0,1,··.,Μ-2}

/ U-一 |_N/M".(M - 1) i = M-l

Where ^N f is the number of ACK/NACKs.

The feedback information on the N^(i) downlink carrier in the f-th group will be transmitted on the uplink subframe "+^ + '·.

The feedback information on multiple carriers in the same group is modulated to obtain a modulation symbol, and the modulation symbol is processed by two spreading and the like to become a single carrier signal.

The channel number used for the transmission may be tied to the control signaling resource number of the user equipment in the first subframe actually used by the user equipment in the subframes that are combined in the time domain on the first downlink carrier in each group. set.

Therefore, the feedback signal converted by the combined feedback information of the downlink carrier 0 to the downlink carrier N _/dtf (0) is transmitted on the uplink subframe n+T of the uplink carrier;

Similarly, the downlink feedback carrier N-N _d M-2) is transmitted to the downlink carrier N-1 in the uplink subframe (n+T+M-1).

As shown in FIG. 9, in the schematic diagram of the feedback of the first purpose TDD system, the embodiment of the present invention performs time domain merging for each carrier.

Let the subframe number of the uplink feedback transmission be ", then the ACK/NACK on the downlink subframe will be merged into a group of bits." The feedback information is transmitted in the subframe, where ζ' = 0,1,···, Μ-1, _{ke K} , is the set listed in Table 1.

On the carrier, the feedback information after the time domain is combined is frequency domain combined to obtain a set of bitwise combined feedback information.

The feedback information is modulated to obtain a modulation symbol, and the modulation symbol is processed by two spreading and the like, and becomes a single carrier signal, which is transmitted on the uplink subframe.

The channel number used for the transmission may be bound to the control signaling resource number of the user equipment in the first subframe actually used by the user equipment in the first subframe in which the time domain is combined on the first downlink carrier.

FIG. 10 is a schematic flowchart of a method for transmitting feedback information for a second purpose according to an embodiment of the present invention. As shown in the figure, a method for feeding back ACK/NACK in a long-term evolution and upgrade long-term evolution multi-carrier upgrade system may include:

Step 1001: After performing demodulation and decoding on the downlink subframe, the user equipment generates ACK/NACK feedback information that needs to be retransmitted in the downlink subframe.

Step 1002: When the number of uplink carriers supported by the user equipment is less than the number of downlink carriers, the user equipment multiplexes multiple ACK/NACK feedback information into one uplink single carrier signal and transmits the data to the base station.

The multiplexing in this step includes: Information; feeding back the set of feedback information to the base station in the corresponding channel number channel.

In the implementation, the user equipment multiplexes the multiple ACK/NACK feedback information into an uplink single-carrier signal, and may include: the user equipment performs baseband processing on the feedback information to generate a single carrier signal. In a specific implementation, the user equipment may modulate the ACK/NACK feedback information to generate a modulation symbol. The modulation mode may be a low-order modulation mode such as BPSK or QPSK to ensure that the uplink feedback transmission has similar coverage with the current data transmission. After modulation, the user equipment spreads the modulation symbol to generate a single carrier signal.

Assume that a user in the system occupies M > 1 downlink carrier for transmission and its uplink can only use single carrier transmission, or the ratio of the number of uplink single carrier signals that the user can simultaneously transmit to the number of downlink carriers occupied is 1: M, and M In the embodiment of the present invention, when the ACK/NACK information on the M downlink carriers is multiplexed and transmitted in the same uplink single carrier signal,

The user equipment will generate 2-bit feedback information: (6(0), 6(1)). The feedback information at this time is a group of bits obtained according to the feedback state mapping on each carrier. In practice, 3 bits and 4 can also be used. The feedback information of bits and the like is described by taking only 2 bits as an example in the present embodiment. 6(0), 6(1) is modulated by QPSK and becomes a symbol. The symbol will be processed by "two-time spreading" according to the existing regulations in the standard, and then the specific channel "^ is transmitted. Among them" Sub-spreading includes: first spreading the frequency domain using a cyclic shift sequence, and then spreading the frequency in the time domain using orthogonal sequences.

In the implementation, before the user equipment multiplexes multiple ACK/NACK feedback information into one uplink single-carrier signal, the ACK/NACK feedback information in each carrier needs to be combined until there is only one ACK on each carrier. /NACK feedback information.

Three different feedback states are supported at this time: ACK, NACK, DTX (no ACK/NACK feedback is sent without any packet detected).

In the implementation, the foregoing merge processing may be:

The ACK/NACK of different codewords are combined into a composite AC ACK feedback information in the same downlink subframe.

For some configurations, ACK/NACK on multiple downlink subframes may be further combined into one ACK/NACK feedback information. FIG. 11 is a schematic diagram of codeword merging on downlink subframes 1-4 for a second purpose according to an embodiment of the present invention. For example, as shown in the figure, codewords on downlink subframes 1-4 are respectively combined, and the combined code is combined. The words are then combined into one ACK/NACK feedback message.

The foregoing merging can be performed according to the existing regulations in the standard, that is, logically adding multiple independent ACK/NACKs, or by other methods.

In the implementation, the user equipment multiplexes the ACK/NACK feedback information in an uplink single carrier signal to the base station, and may include:

The user equipment calculates a feedback channel number used by each downlink carrier according to the downlink control signaling resource number, the carrier number, and the binding relationship.

The binding relationship refers to: a one-to-one correspondence between a downlink control signaling resource number, a carrier number, and a channel number used to transmit the single carrier wave signal; a feedback channel number used by each downlink carrier The value space is a continuous positive integer set; _{When the} user equipment performs feedback, it may select one channel number from multiple channel numbers of different signals according to the feedback state on each carrier, and determine a corresponding group of feedback information, and feedback the channel corresponding channel to the base station. This group of feedback information.

For example, the user equipment calculates the feedback channel number used by each downlink carrier as follows:

Where "AN, _m is the M different channel numbers respectively calculated for the M downlink carriers,

". _{CC £} _m downlink control signaling resource number, w is the carrier number and Μ - Ο,,, Μ -Ι , the function satisfies one relationship, different." Obtained ^CCE ^'m and W map different ^WAN , ^m ;

When the user performs feedback, a channel number is obtained according to the specific feedback status on each carrier.

« _AN , _m and a corresponding set of single carrier signals 6 (0), 6 (1), ie the user will transmit in the channel " ^ = ^), b (l) and " AN. _{M have at} most Μ ⁴ kinds Different combinations, ACK/NACK feedback on M carriers can be represented by different combinations of M x ⁴ . See the combination of Tables 2-4 for better.

It can be seen from the above that the user only needs to feed back 2-bit information in one uplink control channel, and does not need to transmit multiple feedback signaling in M channels at the same time. Since the uplink control channels of the users are multiplexed on the same time-frequency resource by means of code division, it is obvious that the interference between users can be significantly reduced, the detection performance of the signaling is improved, and the overall performance of the system is improved.

Of course, other methods can also be used to implement multiplexed transmission in the implementation, but it needs to satisfy:

1. The signal transmitted after processing must have a single carrier characteristic, that is, the feedback signal occupies a single carrier frequency band;

2. The base station can distinguish feedback information belonging to different carriers;

3, has a relatively reliable detection performance (such as the use of low-order modulation), to ensure that the uplink feedback transmission and downlink data transmission have similar coverage (ie, the terminal can send feedback signals to the base station regardless of where in the cell);

4. When the feedback is transmitted, the channel number used will be bound to the resource number occupied by the user's downlink control signaling.

Based on the same inventive concept, the embodiment of the present invention further provides a user equipment, a base station, and a long-term evolution multi-carrier upgrade system in a long-term evolution multi-carrier upgrade system, and the method for transmitting feedback information for the second purpose according to the embodiment of the present invention There are similar principles, so the method can be referred to in the implementation, and the repetition will not be repeated.

FIG. 12 is a schematic structural diagram of a second-purpose user equipment according to an embodiment of the present invention. As shown in the figure, the user equipment may include:

The generating module 1201 is configured to generate, after demodulation and decoding the data on the downlink subframe, whether the data on the 2-bit downlink subframe needs to be retransmitted ACK/NACK feedback information;

The multiplexing module 1202 is configured to multiplex multiple ACK/NACK feedback information in an uplink single carrier signal when the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, where the multiplexing includes: the user equipment according to each carrier a feedback state, obtaining a channel number and a corresponding set of feedback information; feeding the group of feedback information to the base station in the corresponding channel number channel; The sending module 1203 is configured to transmit the single carrier signal to the base station.

In implementation, the user equipment may further include:

The merging module 1204 is configured to combine ACK/NACK feedback information in each carrier until only one ACK/NACK feedback information is available on each carrier before performing the multiplexing.

In the implementation, the merging module 1204 may be further configured to combine ACK/NACK feedback information of different codewords into a composite ACK/NACK feedback information in the same downlink subframe.

In an implementation, the merging module 1204 is further configured to combine ACK/NACK feedback information on multiple downlink subframes into one ACK/NACK feedback information.

In an implementation, the multiplexing module 1202 may further include:

The calculating unit 12021 is configured to calculate, according to the downlink control signaling resource number, the carrier number, and the binding relationship, a feedback channel number used by each downlink wave;

The binding relationship refers to a one-to-one correspondence between a downlink control signaling resource number, a carrier number, and a channel number used to transmit the single carrier wave signal; a feedback channel number used by each downlink carrier The value space is a continuous positive integer set;

The selecting unit 12022 is configured to select one channel number from the calculated plurality of channel numbers according to a feedback state on each carrier, and determine a corresponding set of feedback information;

At this time, the sending module 1203 is further configured to transmit the feedback information of the corresponding group on the channel corresponding to the selected channel number.

FIG. 13 is a schematic structural diagram of a base station for a second destination according to an embodiment of the present invention. As shown in the figure, the base station may include:

The sending module 1301 is configured to send data on a downlink subframe.

The receiving module 1302 is configured to: when the number of uplink carriers supported by the user equipment is less than the number of downlink carriers, receive ACK/NACK feedback information that needs to be retransmitted in the downlink subframe fed back by the user equipment; where the user equipment sends multiple ACK/ The NACK feedback information is multiplexed in an uplink single carrier signal, and a channel number and a corresponding set of feedback information are obtained according to the feedback state on each carrier; and the group feedback information is fed back to the base station in the channel number corresponding channel.

FIG. 14 is a schematic structural diagram of a long-term evolution multi-carrier upgrade system for a second purpose according to an embodiment of the present invention. As shown in the figure, the system may include:

The user equipment 1401 is configured to: after performing demodulation and decoding on the downlink subframe, whether to generate ACK/NACK feedback information for data to be retransmitted in the downlink subframe; when the number of uplink carriers supported by the user equipment is smaller than the downlink carrier When the number is multiplexed, multiple ACK/NACK feedback information is multiplexed into one uplink single carrier signal and transmitted to the base station, where the multiplexing includes: the user equipment obtains a channel number and a corresponding set according to the feedback state on each carrier wave. Feedback information; feeding the group of feedback information to the base station corresponding to the channel number corresponding channel;

The base station 1402 is configured to send data on the downlink subframe to the user equipment, and receive ACK/NACK feedback information fed back by the user equipment.

When the ACK/NACK feedback information is implemented in the long-term evolution multi-carrier upgrade system, the user equipment performs demodulation and decoding on the downlink subframe after the third subframe. The base station feeds back whether the data in the downlink subframe needs to be retransmitted signaling ACK/NACK; wherein, the user equipment transmits multiple inverses to the base station in one uplink subframe of one uplink carrier Feed channel.

In an embodiment, the user equipment is in an uplink subframe of an uplink carrier, and multiple feedback channels transmitted to the base station at the same time may carry different downlink carriers and different downlink subframes.

ACK/NACK feedback information. That is, multiple ACK/NACK feedback channels can correspond to different carriers and different subframes. Specifically, each of the multiple feedback channels may carry ACK/NACK feedback information in multiple manners, for example, each feedback channel carries only one ACK/NACK feedback in one downlink subframe on a downlink carrier. The information may also be a composite feedback information obtained by combining or multiplexing the ACK/NACK feedback information in multiple downlink carriers or downlink subframes.

In the above-mentioned merge processing or multiplexing processing, it may also be performed in various manners, for example, one of the following methods or any combination of combining processing or multiplexing processing:

Performing combining or multiplexing processing on ACK/NACK feedback information in multiple downlink subframes on the same downlink carrier;

Performing combining processing or multiplexing processing on ACK/NACK feedback information on multiple downlink carriers in the same downlink subframe;

After combining the ACK/NACK feedback information in the multiple downlink subframes on the same downlink carrier, the composite ACK/NACK feedback information on the multiple downlink carriers is combined or multiplexed.

The above-mentioned merge processing or multiplexing processing may be carried out according to the existing regulations in the standard in the specific processing, or may be separately designed according to actual conditions.

According to the specific situation, multiple merge processing or multiplexing processing may be performed in the system. At this time, the priority of the specific processing of the merge processing or the multiplexing processing may be set, for example, when performing multi-codeword transmission, the system uses spatial multiplexing. The technology will multiplex multiple streams of data belonging to the same user on the same physical resource. In a sub-frame, data on different data streams is independently encoded into a code word. The ACK/NACK information fed back at this time will be generated based on the codeword, that is, after decoding each codeword, an independent ACK/NACK feedback will be obtained. At this time, ACK/NACK feedback can be performed according to the following priorities:

Preferably, ACK/NACK feedback information belonging to the same codeword in different subframes on the same downlink carrier is combined or multiplexed;

Secondly, combining or multiplexing the ACK/NACK feedback information of different codewords on the same downlink carrier;

Finally, the ACK/NACK feedback information on different downlink carriers is combined or multiplexed.

In practice, in each feedback channel, the feedback information can be processed using existing methods in the standard.

When the base station performs the downlink control signaling transmission, each user is allocated a dedicated resource. However, for feedback of the uplink ACK/NACK feedback information, the user equipment does not know the channel condition of other user equipments, in order to avoid resource conflicts during feedback of the user equipment. The user equipment that performs feedback will calculate the channel number used for feedback ACK/NACK feedback information according to the resource number and binding relationship of the downlink control signaling received by the user equipment, and the channel number feedback according to the calculated channel number is used. ACK/NACK feedback information: The binding relationship refers to: a binding relationship between a channel number used for feeding back ACK/NACK feedback information and a downlink control signaling resource number received by the user equipment on the corresponding carrier and the subframe.

The foregoing binding relationship may be a mapping function. In the implementation, an existing mapping function in the standard may be used, or other mapping functions may be used. Regardless of the mapping function, the following conditions are satisfied: The ACK/NACK feedback is used. The channel number satisfies a one-to-one correspondence between the corresponding carrier and the downlink control signaling resource number received by the user equipment on the subframe;

The value space of the channel number used for ACK/NACK feedback is a continuous positive integer set. If the resource number indicating the downlink control signaling received by the user equipment is used to indicate the resource (ie, channel) number used by the user equipment for ACK/NACK feedback, the foregoing correspondence is:

Different "^ corresponds to different"

Different carriers, sub-frames with the same "^ number of users, their corresponding "^ are also different; for example, according to the existing mapping function in the standard, is a function of "AN" = U + N, which is the upper layer Configuration parameters, the function satisfies the one-to-one correspondence, that is, different "cc _E mapping will get different.

The value space is a set of consecutive positive integers, including:

The value of the feedback channel number on each carrier is a continuous positive integer set;

The feedback channel number in each subframe takes a value space as a continuous positive integer set.

In the implementation, when calculating the channel number used for feeding back the ACK/NACK feedback information, the ACK/NACK feedback information subjected to the combining process or the multiplexing process may be used in the carrier and the subframe in which the combining process or the multiplexing process is performed, the user equipment The downlink control signaling resource number on one subframe of a carrier that is actually occupied is used to calculate its feedback channel number.

A specific example is given below to illustrate the ACK/NACK feedback method of the present invention.

This example assumes that in the TDD system, one uplink carrier is to be carried on the downlink carrier.

ACK/NACK feedback, and the downlink subframe "ACK/NACK on one ^ is to be fed in the uplink subframe", where = 0, ., M -1, k , is the set listed in Table 1.

In the uplink subframe, it can carry:

M x N uplink feedback channels, each feedback channel corresponding to one downlink subframe on one downlink carrier.

If combined with the combining process or the multiplexing process, only one uplink feedback channel needs to be fed back, where M, ≤ M, N < N, .

In each feedback channel, the feedback information is processed using existing methods in the standard.

The channel number used for the feedback has a binding relationship with the corresponding carrier and the downlink control signaling resource number used by the user equipment on the subframe.

FIG. 15 is a schematic diagram showing frequency hopping distribution of several feedback channels for the third purpose in the embodiment of the present invention, where:

The feedback channels on the same downlink carrier are continuously distributed; the feedback channels on the same downlink subframe are consecutive Distribution.

The feedback channel information of the downlink control signaling resource number in the first subframe on the first carrier actually occupied by the user equipment is used to calculate the feedback channel number in the carrier and the subframe in which the combining process is performed. .

Based on the same inventive concept, the embodiment of the present invention further provides a user equipment, which has a structure as shown in FIG. 16 and may include:

The downlink processing module 1601 is configured to perform demodulation processing and decoding processing on the data in the downlink subframe, and the retransmission feedback module 1602 is configured to: after the downlink processing module completes processing and decoding processing on the downlink subframe, The ACK/NACK feedback information of whether the data in the downlink subframe needs to be retransmitted is fed back to the base station in the uplink subframe, where multiple feedback channels are simultaneously transmitted to the base station in one uplink subframe of one uplink carrier.

In the implementation, the retransmission feedback module 1602 can also be used to carry ACK/NACK feedback information in different downlink carriers and different downlink subframes in multiple feedback channels.

In an implementation, the retransmission feedback module 1602 may also carry only ACK/NACK feedback information in one downlink subframe on a downlink carrier on each of the multiple feedback channels;

Or, on a feedback channel of each of the multiple feedback channels, the ACK/NACK feedback information in the downlink carrier or the downlink subframe is combined or multiplexed, and a composite feedback signal is obtained, The pass feedback module 1602 can also perform merge processing or multiplexing processing in one or any combination of the following manners:

In the implementation, the retransmission feedback module 1602 may be further configured to perform merging processing or multiplexing processing on ACK/NACK feedback information belonging to the same codeword in different subframes on the same downlink carrier when performing the combining processing or multiplexing processing. Secondly, the ACK/NACK feedback information of different codewords on the same downlink carrier is combined or multiplexed, and finally the ACK/NACK feedback information on different downlink carriers is combined or multiplexed.

As shown in FIG. 17, in an embodiment of the present invention, the retransmission feedback module 1602 may further include:

The calculating unit 1701 is configured to calculate, according to the resource number and binding relationship of the received downlink control signaling, a channel number used for feeding back ACK/NACK feedback information, where the binding relationship is: feedback ACK/NACK feedback information a binding relationship between the used channel number and the downlink control signaling resource number received by the user equipment on the corresponding carrier wave and the subframe;

The feedback unit 1702 is configured to feed back ACK/NACK feedback information according to the calculated channel number. Based on the same inventive concept, the embodiment of the present invention further provides a base station for the third purpose, as shown in the figure. 18, including:

a sending module 1801, configured to send data on a downlink subframe;

The receiving module 1802 is configured to receive, on the uplink subframe, ACK/NACK feedback information that the data on the downlink subframe that is fed back by the user equipment needs to be retransmitted, where multiple feedback channels are simultaneously received in one uplink subframe of one uplink carrier. .

In an implementation, the receiving module 1802 is further configured to receive ACK/NACK feedback information in different downlink carriers and different downlink subframes on multiple feedback channels.

In an implementation, the receiving module 1802 may also receive only ACK/NACK feedback information in one downlink subframe on one downlink carrier on each of the multiple feedback channels.

Or, on each feedback channel of the multiple feedback channels, receiving a composite feedback information obtained by combining or multiplexing the ACK/NACK feedback information in the multiple downlink carriers or the downlink subframes.

Based on the same inventive concept, the embodiment of the present invention further provides a long-term evolution multi-carrier upgrade system for the third purpose. As shown in FIG. 19, the method may include:

The user equipment 1901 is configured to: after performing demodulation processing and decoding processing on the data in the downlink subframe, feed back, in the uplink subframe, whether the data in the downlink subframe needs to be retransmitted ACK/NACK feedback information, where the user equipment is A plurality of feedback channels are simultaneously transmitted on an uplink subframe of an uplink carrier; the base station 1902 is configured to send data on the downlink subframe to the user equipment; and receive ACK/NACK feedback information fed back by the user equipment.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart Step.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the inventions. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for transmitting feedback information, the method comprising:

After the demodulation and decoding of the data on the downlink subframe are completed, whether ACK/NACK feedback information needs to be retransmitted in the downlink subframe is generated;

Merging all the determined feedback information;

The combined feedback information is sent through the uplink carrier.

2. The method according to claim 1, wherein the merging processing of all the determined feedback information comprises:

And downlink subframes of all downlink carriers are grouped, and downlink subframes in each group are downlink subframes in the same downlink carrier;

The feedback information corresponding to the codewords carried by the downlink subframes in each group is separately processed, and the feedback information after the combination processing is obtained.

The method according to claim 2, wherein the transmitting the merged feedback information through the uplink carrier comprises:

Sending feedback information of each group of corresponding merged processing through consecutive uplink subframes of the uplink carrier;

4. The method according to claim 2, wherein a group has a downlink subframe carrying a plurality of codewords;

The combining the feedback information corresponding to the downlink subframes in each group includes: combining the feedback information corresponding to the codewords of the same codeword number in a group.

5. The method according to claim 1, wherein the merging processing of all the determined feedback information comprises:

The downlink subframes of all downlink carriers are grouped, and the subframe numbers of the downlink subframes in each group are the same;

The method according to claim 5, wherein the transmitting the merged processed feedback information by using the uplink carrier comprises:

The feedback information of the corresponding merged processing is sent in the uplink subframe of the uplink carrier. The feedback information of the corresponding merged processing is sent in one uplink subframe of the uplink carrier.

7. The method of claim 5, wherein the combining the feedback information comprises:

Determining at least one downlink subframe in the group, and performing combining processing on the feedback information corresponding to the codeword carried by the determined downlink subframe;

The feedback information corresponding to the codewords carried by the remaining downlink subframes in the group is combined.

8. The method of claim 5, wherein one group carries a plurality of codewords Row subframe

The consolidation of feedback information includes:

The feedback information corresponding to the multiple codewords carried by the same downlink sub-frame is combined, and the combined feedback information is used as the feedback information corresponding to the codewords carried by the downlink sub-frame, and the downlink sub-groups in the group The feedback information corresponding to the codeword carried by the frame is combined; or

The feedback information corresponding to the multiple codewords carried by the same downlink subframe is combined, and the combined feedback information is used as feedback information corresponding to the codewords carried by the downlink subframe, and at least one of the groups is determined. The downlink sub-frame performs a combining process on the feedback information corresponding to the codewords carried by the determined downlink sub-frames, and performs the combining processing on the feedback information corresponding to the codewords carried in the remaining downlink sub-frames in the group; or

The feedback information corresponding to the codewords of the same codeword number in a group is combined.

The method according to claim 2, 4, 5, 7 or 8, wherein after the feedback information is combined, the feedback information after the merge processing is sent includes:

The obtained feedback information of each group of the combined processing is again combined and processed.

Performing time domain multiplexing processing on the obtained combined feedback information of each group to obtain a feedback signal, where the feedback signal occupies a single carrier frequency band;

The sending, by the combined processing, the feedback information by using the uplink carrier includes:

Determining, according to a correspondence between the content of the feedback information and the feedback channel in the uplink subframe, a feedback channel of the uplink subframe corresponding to the content of the feedback information after the combining processing;

The feedback signal is transmitted through a feedback channel in the determined uplink subframe.

The method according to claim 2 or 5, wherein, when the feedback information of the merge processing is all the response information ACK, the feedback information after the merge processing is ACK;

The feedback information for the merge processing is all the error response information NACK, and when the set number of retransmissions is not reached, the feedback information after the merge processing is NACK.

The method according to claim 3 or 6, wherein the transmitting the merged feedback information through the uplink carrier comprises:

Converting each group of corresponding combined processed feedback information into a feedback signal, wherein the feedback signal occupies a single carrier frequency band;

Determining, according to the feedback channel in the uplink subframe corresponding to the downlink subframe in each group, the feedback channel in the uplink subframe corresponding to the feedback signal converted by the feedback information of each group;

13. A user equipment, the user equipment comprising:

a receiving processing module, configured to perform demodulation processing and decoding processing on data in the downlink subframe; and an information determining module, configured to generate ACK/NACK feedback information that the data on the downlink subframe needs to be retransmitted;

And a sending module, configured to send the combined feedback information by using an uplink carrier.

The user equipment according to claim 13, wherein the processing module comprises: a first grouping module, configured to group downlink subframes of all downlink carriers, where downlink subframes in each group are downlink subframes in the same downlink carrier;

The first merging processing module is configured to perform merging processing on the feedback information corresponding to the codewords carried by the downlink sub-frames in each group to obtain feedback information of each group corresponding to the combined processing.

The user equipment according to claim 14, wherein the sending module is specifically configured to:

The user equipment according to claim 14, wherein the first merge processing module is specifically configured to:

When there are downlink subframes carrying multiple codewords in a group, the feedback information corresponding to the codewords of the same codeword number in a group is combined.

The user equipment according to claim 14 or 16, wherein the first merge processing module is further configured to:

After the feedback information corresponding to the codewords carried by the downlink sub-frames in each group is separately processed, the sending module sends the feedback information to the merged information of each group.

After performing the merging process on the feedback information corresponding to the codewords carried by the downlink sub-frames in each group, the transmitting module performs frequency domain multiplexing on each group of the corresponding combined processing feedback information before sending the feedback information. Processing, obtaining a feedback signal, where the feedback signal occupies a single carrier frequency band; the sending module is specifically configured to:

Determining, according to a correspondence between the content of the feedback information and the feedback channel in the uplink subframe, a feedback channel of the uplink subframe corresponding to the content of the feedback information, and transmitting the feedback signal by using the feedback channel in the determined uplink subframe .

The user equipment according to claim 13, wherein the processing module comprises: a second grouping module, configured to group downlink subframes of all downlink carriers, and sub-subframes of each group The frame number is the same;

The second merging processing module is configured to perform merging processing on the feedback information corresponding to the codewords carried by the downlink sub-frames in each group to obtain feedback information of each group corresponding to the combined processing.

The user equipment according to claim 19, wherein the sending module is specifically configured to:

The user equipment according to claim 19, wherein the second merging module is specifically configured to: Determining at least one downlink subframe in the group, combining the feedback information corresponding to the codewords carried in the determined downlink subframes, and combining the feedback information corresponding to the codewords carried in the remaining downlink subframes in the group .

The user equipment according to claim 19, wherein if a group has a downlink subframe that carries multiple codewords, the second merging module is specifically configured to:

The feedback information corresponding to the multiple codewords carried by the same downlink sub-frame is combined, and the combined feedback information is used as the feedback information corresponding to the codeword carried by the downlink sub-frame, and the downlink sub-frame in the group The feedback information corresponding to the carried codeword is combined; or

The feedback information corresponding to the multiple codewords carried by the same downlink sub-frame is combined, and the combined feedback information is used as the feedback information corresponding to the codeword carried in the downlink sub-frame, and at least one downlink in the group is determined. And performing a combining process on the feedback information corresponding to the codewords carried by the determined downlink subframes, and combining the feedback information corresponding to the codewords carried in the remaining downlink subframes in the group; or

The user equipment according to claim 19, 21 or 22, wherein the second merge processing module is further configured to:

After performing the merging process on the feedback information corresponding to the codewords carried in the downlink sub-frames in each group, the sending module performs time-domain multiplexing on each group of the corresponding combined processing feedback information before sending the feedback information. Processing, obtaining a feedback signal, the feedback signal occupies a single carrier frequency band; the sending module is configured to:

The user equipment according to claim 15 or 20, wherein the sending module is configured to:

Converting each group of the corresponding merged feedback information into a feedback signal, and determining, according to the feedback channel in the uplink subframe corresponding to the downlink subframe in each group, an uplink subframe corresponding to the feedback signal converted by each group of feedback information The feedback channel transmits the feedback signal through a feedback channel in the determined uplink subframe, where the feedback signal occupies a single carrier frequency band.

26. A method of transmitting feedback information, the method comprising:

After the user equipment demodulates and decodes the data on the downlink subframe, the user equipment generates ACK/NACK feedback information that needs to be retransmitted in the downlink subframe.

When the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, the user equipment multiplexes multiple ACKJNACK feedback information into one uplink single carrier signal and transmits the data to the base station, where the multiplexing includes: The user equipment obtains a channel number and a corresponding set of feedback information according to the feedback state on each carrier; and feeds the group of feedback information to the base station according to the channel number corresponding channel.

The method according to claim 26, wherein the multiplexing, by the user equipment, the multiple ACK/NACK feedback information on one uplink single carrier signal further includes:

The user equipment performs baseband processing on the feedback information to generate a single carrier signal.

28. The method of claim 27, further comprising: before performing said multiplexing, further comprising:

The user equipment combines the ACK/NACK feedback information in each carrier until there is only one ACK/NACK feedback information on each carrier.

The method according to claim 28, wherein the merging of the ACK/NACK feedback information in each carrier by the user equipment comprises:

The user equipment combines ACK/NACK feedback information of different codewords into a composite ACK/NACK feedback information in the same downlink subframe.

The method of claim 29, wherein the merging the ACK/NACK feedback information in each carrier by the user equipment further comprises:

The user equipment combines ACK/NACK feedback information on multiple downlink subframes into one ACK/NACK feedback information.

The user equipment calculates a feedback channel number used by each downlink carrier according to the downlink control signaling resource number, the carrier number, and the binding relationship;

The binding relationship refers to: a one-to-one correspondence between a downlink control signaling resource number, a carrier number, and a channel number used to transmit the single carrier signal; and a feedback channel number used by each downlink carrier. The value space is a continuous positive integer set;

When performing feedback, the user equipment selects one channel number from the calculated multiple channel numbers according to the feedback state on each carrier, and determines a corresponding group of feedback information, and feeds back the channel number corresponding channel to the base station. Group feedback information.

32. A user equipment, where the user equipment includes:

a multiplexing module, configured to multiplex a plurality of ACK/NACK feedback information in an uplink single carrier signal when the number of uplink carriers supported by the user equipment is smaller than the number of downlink carriers, where the multiplexing includes: the user equipment according to each carrier wave a feedback state, obtaining a channel number and a corresponding set of feedback information; feeding the group of feedback information to the base station in the corresponding channel number channel;

The user equipment according to claim 32, wherein the user equipment further comprises: a merging module, configured to merge ACK/NACK feedback information in each carrier before performing the multiplexing, until There is only one ACK/NACK feedback message on each carrier.

The user equipment according to claim 33, wherein the merging module is further configured to: The ACK/NACK feedback information of different codewords in the same downlink subframe is combined into a composite ACK/NACK feedback information.

The user equipment according to claim 34, wherein the merging module is further configured to:

The ACK/NACK feedback information on multiple downlink subframes is combined into one ACK/NACK feedback information.

The user equipment according to claim 32, wherein the multiplexing module further comprises:

a calculation unit, configured to calculate a feedback channel number used by each downlink carrier according to a downlink control signaling resource number, a carrier number, and a binding relationship, where the binding relationship is: a downlink control signaling resource number, a carrier number a one-to-one correspondence between channel numbers used for transmitting the single carrier signal; a value space of a feedback channel number used by each downlink carrier is a continuous positive integer set;

a selecting unit, configured to select a channel number from the calculated plurality of channel numbers according to a feedback state on each carrier, and determine a corresponding set of feedback information;

The sending module is further configured to:

The channel number corresponding to the selected channel number corresponds to the feedback information of the corresponding group.

37. A base station, the base station includes:

a sending module, configured to send data on a downlink subframe;

38. A method for transmitting feedback information, the method comprising:

After completing the demodulation and decoding of the data on the downlink subframe, the user equipment feeds back, on the uplink subframe, the ACK/NACK feedback information of whether the data on the downlink subframe needs to be retransmitted to the base station;

The method according to claim 38, wherein the plurality of feedback channels carry different downlink carriers and ACK/NACK feedback information in different downlink subframes.

40. The method of claim 39, wherein each of the plurality of feedback channels is a feedback channel:

The ACK/NACK feedback information in one downlink subframe of one downlink carrier is only carried; or the one obtained by combining or multiplexing the ACK/NACK feedback information in multiple downlink carriers or downlink subframes is obtained. Composite feedback information.

41. The method of claim 40, wherein the combining or multiplexing process is performed in one or any combination of:

Merging ACK/NACK feedback information on multiple downlink carriers in the same downlink subframe Or multiplexing processing;

The method according to claim 40, wherein, when performing the combining process or the multiplexing process, ACK/NACK feedback information belonging to the same codeword in different subframes on the same downlink carrier is preferentially combined. Or multiplexing processing; secondly, combining or multiplexing the ACK/NACK feedback information of different codewords on the same downlink carrier; and finally performing merging processing or multiplexing processing on the ACK/NACK feedback information on different downlink carriers.

The method of claim 40, wherein: the user equipment feeding back ACK/NACK feedback information includes:

The user equipment calculates a channel number used for feedback according to the resource number and binding relationship of the received downlink control signaling, and feeds back ACK/NACK feedback information according to the calculated channel number;

The binding relationship refers to: a binding relationship between the channel number used for the feedback and the downlink control signaling resource number received by the user equipment on the corresponding carrier and the subframe.

44. The method according to claim 43, wherein the binding relationship refers to a mapping function that satisfies the following conditions:

The channel number used for the feedback and the corresponding carrier and the downlink control signaling resource number received by the user equipment on the subframe satisfy the corresponding relationship;

The value space of the channel number used for feedback is a continuous positive integer set.

The method according to claim 43, wherein, when calculating the channel number used for the feedback, the ACK/NACK feedback information subjected to the combining processing or the multiplexing processing is subjected to a combining process or a multiplexing process. In the carrier and the subframe, the downlink control signaling resource number on one subframe of one carrier actually occupied by the user equipment calculates its feedback channel number.

46. A user equipment, where the user equipment includes:

a retransmission feedback module, configured to: after the downlink processing module completes demodulation and decoding of data on the downlink subframe, feedback, in an uplink subframe, whether the data in the downlink subframe needs to be retransmitted to the base station

ACK/NACK feedback information;

Wherein, in one uplink subframe of one uplink carrier, multiple feedback channels are simultaneously transmitted to the base station.

47. The user equipment according to claim 46, wherein the retransmission feedback module is further used to:

The multiple feedback channels carry ACK/NACK feedback information in different downlink carriers and different downlink subframes.

The user equipment according to claim 47, wherein the retransmission feedback module is further used to:

And transmitting, on each of the plurality of feedback channels, only ACK/NACK feedback information in one downlink subframe on one downlink carrier; or On each of the plurality of feedback channels, only one composite feedback information obtained by combining or multiplexing the ACK/NACK feedback information in the plurality of downlink carriers or downlink subframes is carried.

The user equipment according to claim 48, wherein the retransmission feedback module is further configured to perform the combining processing or multiplexing processing in one or any combination of the following manners:

50. The user equipment according to claim 48, wherein the retransmission feedback module is further used to:

When performing the combining or multiplexing, preferentially combining or multiplexing ACK/NACK feedback information belonging to the same codeword in different subframes on the same downlink carrier, and secondly, ACK/NACK feedback on different codewords on the same downlink carrier. The information is combined or multiplexed, and finally the ACK/NACK feedback information on different downlink carriers is combined or multiplexed.

The user equipment according to claim 46, wherein the retransmission feedback module further comprises:

a calculation unit, configured to calculate, according to the resource number and the binding relationship of the received downlink control signaling, a channel number used for performing feedback, where the binding relationship is: a channel number used for performing feedback and a corresponding carrier And a binding relationship of the downlink control signaling resource number received by the user equipment on the subframe;

a feedback unit, configured to feed back ACK/NACK feedback information according to the calculated channel number.

52. A base station, the base station includes:

a sending module, configured to send data on a downlink subframe;

The receiving module is configured to receive, on the uplink subframe, ACK/NACK feedback information that the data on the downlink subframe that is fed back by the user equipment needs to be retransmitted, where multiple feedback channels are simultaneously received in one uplink subframe of one uplink carrier.

The base station according to claim 52, wherein the receiving module is further configured to: receive, in the different downlink carriers, different downlink subframes, in the multiple feedback channels,

ACK/NACK feedback information.

The base station according to claim 55, wherein the receiving module is further configured to: receive, in each of the plurality of feedback channels, only one downlink subframe in a downlink subframe ACK/NACK feedback information; or

And receiving, on each of the plurality of feedback channels, a composite feedback information obtained by combining or multiplexing the ACK/NACK feedback information in the plurality of downlink carriers or downlink subframes.