WO2018028435A1

WO2018028435A1 - Method and apparatus for determining feedback codebook

Info

Publication number: WO2018028435A1
Application number: PCT/CN2017/094603
Authority: WO
Inventors: 司倩倩; 高雪娟; 潘学明
Original assignee: 电信科学技术研究院
Priority date: 2016-08-12
Filing date: 2017-07-27
Publication date: 2018-02-15
Also published as: CN107733475A; CN107733475B

Abstract

The present disclosure provides a method and apparatus for determining a feedback codebook, and belongs to the technical field of communications. The method for determining a feedback codebook comprises: a communications terminal determining the size of the feedback codebook according to one or more of the parameters corresponding to each TTI length: maximum feedback window size M, minimum feedback delay k, TTI length capable of being transmitted on a carrier wave, quantity of TTI lengths that may be transmitted on the carrier wave, and TTI length carrying feedback information.

Description

Method and device for determining feedback codebook

Cross-reference to related applications

The present application claims priority to the Chinese Patent Office, filed on Aug. 12, 2016, which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for determining a feedback codebook.

Background technique

With the development of mobile communication service requirements, organizations such as the ITU (International Telecommunications Union) have defined higher user plane delay performance requirements for future mobile communication systems. One of the main methods for shortening the user's delay performance is to reduce the length of the TTI (Transmission Time Interval). After the TTI of the traffic channel is shortened, the ACK (acknowledgement)/NACK (negative) feedback of the downlink data may indicate a specific feedback location through downlink scheduling signaling.

For single-carrier transmission, a LTE (Long Term Evolution) system uses a bundling or multiplexing scheme to feed back, and generates a 1-bit or 2-bit ACK/NACK feedback codebook according to different conditions.

For multi-carrier transmission, the LTE system uses PUCCH (Physical Uplink Control CHannel) format 1b with channel selection (channel selection) or PUCCH format 3/4/5 for feedback. When using PUCCH format1b with channel selection for feedback, a 1-bit or 2-bit ACK/NACK feedback codebook is generated according to different conditions; when using PUCCH format 3 for feedback, according to the feedback window size, the number of configured carriers and carrier The transmission mode generates a fixed ACK/NACK feedback codebook size; when using PUCCH format 4/5 for feedback, it supports fixed and dynamic feedback codebook size. When using fixed codebook size, the carrier is configured according to the feedback window size. The number and carrier transmission mode generates a fixed ACK/NACK feedback codebook size. When a dynamic codebook size is used, a 2-bit counter DAI is used in the downlink scheduling signaling to indicate the scheduling subframe/carrier number. And 2 The total (total) DAI of the bit is used to indicate the total number of scheduled subframes/carriers up to the current subframe, and both the base station and the communication end determine the size of the final feedback codebook according to the counter DAI and the total DAI.

In the LTE system, since the feedback window position is known, both the base station and the communication end can determine the feedback codebook size based on the feedback window position. However, if the ACK/NACK feedback position of the downlink data is used in the system, the feedback window position is unknown to the communication end, and the communication terminal cannot know the feedback window size in advance, and thus cannot determine the size of the feedback codebook. .

Summary of the invention

The technical problem to be solved by the present disclosure is to provide a method and a device for determining a feedback codebook, which enable a base station and a communication end to determine the size of an ACK/NACK codebook when the base station performs flexible notification by the base station.

To solve the above technical problem, the embodiments of the present disclosure provide the following technical solutions:

In one aspect, a method for determining a feedback codebook is provided, including:

The communication end according to the maximum feedback window size M, the minimum feedback delay k corresponding to each TTI length, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information The parameters determine the size of the feedback codebook.

Further, the maximum feedback window size M is a predefined value or a value determined by signaling interaction with other communication terminals; or

The maximum feedback window size M is obtained by the communication end according to the number of bits indicating the feedback delay m defined in the downlink scheduling signaling.

Further, the minimum feedback delay k is a predefined value.

Further, the communication end is configured according to a maximum feedback window size M corresponding to each TTI length, a minimum feedback delay k, a TTI length that can be transmitted on the carrier, a number of TTI lengths that can be transmitted, and a TTI length that carries feedback information. One or more parameters determine the size of the feedback codebook including:

When there is only one length of TTI on the carrier, the size of the feedback codebook on the carrier is determined according to the maximum feedback window size M and the transmission mode of the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the size of the feedback codebook corresponding to the TTI length is determined according to the maximum feedback window size M corresponding to each TTI length and the transmission mode of the carrier. The sum of the sizes of the feedback codebooks corresponding to different TTI lengths is taken as the The size of the feedback codebook on the wave; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the corresponding feedback is determined according to the maximum feedback window size M corresponding to each TTI length, the minimum feedback delay k, and the TTI length of the bearer feedback information. The position of the window, if the feedback window positions corresponding to different TTI lengths do not overlap, the sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; otherwise, the overlapping portions are based on The shortest TTI length determines the size of the feedback codebook, and the size of the feedback codebook is determined according to the length of the TTI in the non-overlapping portion.

Further, in the time division duplex system, the feedback information bits corresponding to the TTI determined as the uplink transmission in the feedback window are subtracted, and the size of the feedback codebook is obtained.

Further, after the communication end is a terminal, after determining the size of the feedback codebook, the method further includes:

Generating feedback information according to the determined size of the feedback codebook, and sending feedback information to the base station at the corresponding feedback position; or

After the communication end is a base station, after determining the size of the feedback codebook, the method further includes:

Receiving feedback information sent by the terminal at a corresponding feedback position according to the determined size of the feedback codebook.

Further, the generating the feedback information according to the determined size of the feedback codebook, and sending the feedback information to the base station at the corresponding feedback location includes:

Determining a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, m is an indication feedback delay corresponding to the sTTI, and sTTI is a downlink data TTI that needs to be fed back The actual length or minimum TTI length that can be transmitted on the carrier.

When there is only one length of TTI on the single-carrier transmission and the carrier has a TTI, the feedback codebook is sorted according to the TTI in the feedback window, and the NTI/DTX is added to the corresponding location to obtain the feedback information.

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, and then feedback information corresponding to different lengths of TTI in cascading order And generating, by the cascading, the feedback information, where the base station and the terminal determine a cascading sequence of different length TTI feedback information according to a predefined manner;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths do not overlap, the feedback information corresponding to different TTI lengths is cascaded in a cascading order;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths overlap, and the shortest TTI length is actually transmitted in the overlapping portion, the feedback information is generated according to the shortest TTI, if the actual transmission is not the shortest in the overlapping portion The TTI length, and the shortest TTI length includes x shortest TTI lengths, and the feedback information corresponding to the shortest TTI length is repeated x times to obtain feedback information of the overlapping portion; or, the The feedback information corresponding to the shortest TTI length is used as the first feedback information, and the remaining positions are supplemented with NACK/DTX; in the non-overlapping portion, the feedback information is generated according to the actually transmitted TTI length;

During single-carrier transmission, the feedback codebook is sorted according to the downlink allocation index DAI indicated in the downlink scheduling signaling to generate feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied.

Further, in the case of multi-carrier transmission, feedback information is separately generated for each carrier by using the method as described above, and the generated feedback information is cascaded as a feedback codebook transmitted to the base station.

The embodiment of the present disclosure further provides a determining apparatus for the feedback codebook, including:

The processing module is configured to: according to a maximum feedback window size M, a minimum feedback delay k corresponding to each TTI length, a TTI length that can be transmitted on the carrier, a number of TTI lengths that can be transmitted, and a TTI length that carries feedback information. One or more parameters determine the size of the feedback codebook.

The maximum feedback window size M is obtained by the processing module according to the number of bits indicating the feedback delay m defined in the downlink scheduling signaling.

Further, the minimum feedback delay k is a predefined value.

Further, the processing module is specifically configured to determine, according to a maximum feedback window size M and a transmission mode of the carrier, a size of the feedback codebook on the carrier when there is only one length of TTI on the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the size of the feedback codebook corresponding to the TTI length is determined according to the maximum feedback window size M corresponding to each TTI length and the transmission mode of the carrier. The sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; or

Further, in the time division duplex system, the processing module is configured to subtract the feedback information bit corresponding to the TTI determined as the uplink transmission in the feedback window, to obtain the size of the feedback codebook.

Further, the determining device is applied to the terminal, and the device further includes:

a feedback module, configured to generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at the corresponding feedback location;

The determining device is applied to a base station, and the device further includes:

The receiving module is configured to receive the feedback information sent by the terminal at the corresponding feedback position according to the determined size of the feedback codebook.

Further, the feedback module is specifically configured to determine a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, and m is an indication feedback delay corresponding to the sTTI. The sTTI is the actual length of the downlink data TTI that needs to be fed back or the minimum TTI length that can be transmitted on the carrier.

Further, the feedback module is specifically configured to: when a single carrier is transmitted and only one length of TTI exists on the carrier, the feedback codebook is sorted according to the TTI sequence in the feedback window, and the TTI that does not receive the information is in the corresponding position. Supplement NACK/DTX to get feedback information;

For single-carrier transmission and multiple lengths of TTI on the carrier, for each length of TTI, The feedback codebook is sequentially sorted according to the TTI in the feedback window, and the NTI/DTX is added to the corresponding location of the TTI that has not received the information, and then the feedback information corresponding to the TTIs of different lengths is cascaded in a cascading order to generate feedback information. The base station and the terminal determine a cascading sequence of different length TTI feedback information according to a predefined manner;

Further, in the multi-carrier transmission, the feedback module is configured to separately generate feedback information for each carrier, and cascade the generated feedback information as a feedback codebook sent to the base station.

The embodiment of the present disclosure further provides a method for determining a feedback codebook, including:

The communication end determines the size of the feedback codebook according to predefined information or configuration information, the configuration information indicating a feedback window size on one or more carriers, and the feedback window transmits data of one or more TTI lengths.

Further, the downlink scheduling index corresponding to the TTI transmitted in the feedback window carries the downlink allocation index DAI.

Further, the communication terminal is a terminal, and the configuration information is sent by the base station to the terminal, and the reverse is determined. After the size of the codebook, the method further includes:

Generating feedback information according to the determined size of the feedback codebook, and transmitting feedback information to the base station at a corresponding feedback position;

During single-carrier transmission, the feedback codebook is sorted according to the DAI indicated in the downlink scheduling signaling to generate feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied.

a processing module, configured to determine a size of the feedback codebook according to the predefined information or the configuration information delivered by the base station, where the configuration information indicates a feedback window size on one or more carriers, and the feedback window transmits one or more Data for the length of the TTI.

Further, the determining device is applied to the terminal, and the configuration information is sent to the terminal by the base station, and the device further includes:

a feedback module, configured to generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at a corresponding feedback location;

Further, the feedback module is specifically configured to: when the single carrier transmits, sort the feedback code according to the DAI indicated in the downlink scheduling signaling to generate feedback information, and supplement the NACK/DTX at the end of the feedback information until the determined feedback codebook is satisfied. the size of.

An embodiment of the present disclosure further provides a determining apparatus for a feedback codebook, including a processor and a memory, wherein: the processor, by executing programs and data stored in the memory, according to each TTI length Corresponding maximum feedback window size M, minimum feedback delay k, length of TTIs that can be transmitted on the carrier, number of TTIs that can be transmitted, and one or more parameters of TTI lengths that carry feedback information determine the size of the feedback codebook. .

An embodiment of the present disclosure further provides a determining apparatus for a feedback codebook, including a processor and a memory, wherein: the processor executes the program and data stored in the memory according to predefined information or The configuration information determines a size of the feedback codebook, the configuration information indicating a feedback window size on one or more carriers, the feedback window transmitting data of one or more TTI lengths.

Embodiments of the present disclosure have the following beneficial effects:

In the foregoing solution, the feedback is determined according to one or more of the maximum feedback window size M, the minimum feedback delay k, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information. The size of the codebook or directly determines the size of the feedback window according to the predefined or configuration information, and enables the base station and the communication end to determine the size of the ACK/NACK codebook when the feedback location is flexibly notified by the base station, thereby avoiding the pair between the base station and the terminal. The ACK/NACK codebook size is misunderstood.

DRAWINGS

FIG. 1 is a schematic flowchart diagram of a method for determining a feedback codebook according to an embodiment of the present disclosure;

2 is a schematic flowchart of a method for determining a feedback codebook according to another embodiment of the present disclosure;

FIG. 3 is a schematic flowchart diagram of a method for determining a feedback codebook according to still another embodiment of the present disclosure;

4 is a structural block diagram of a device for determining a feedback codebook according to an embodiment of the present disclosure;

FIG. 5 is a structural block diagram of a device for determining a feedback codebook according to another embodiment of the present disclosure;

6 is a structural block diagram of a device for determining a feedback codebook according to still another embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of a method for determining a feedback codebook according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart diagram of a method for determining a feedback codebook according to another embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of a method for determining a feedback codebook according to still another embodiment of the present disclosure;

FIG. 10 is a structural block diagram of a device for determining a feedback codebook according to an embodiment of the present disclosure;

FIG. 11 is a structural block diagram of a device for determining a feedback codebook according to another embodiment of the present disclosure;

FIG. 12 is a structural block diagram of a device for determining a feedback codebook according to still another embodiment of the present disclosure;

13 is a schematic diagram of single-carrier transmission according to Embodiment 1 of the present disclosure, and there is only one length of TTI transmission on a carrier;

14 is a schematic diagram of a single-carrier transmission according to Embodiment 2 of the present disclosure, in which two lengths of TTI transmissions exist simultaneously on a carrier, and feedback windows of two length TTIs do not overlap;

15 is a schematic diagram of a single carrier transmission and two lengths of TTI transmissions on a carrier, and feedback windows of two length TTIs overlap;

16 is a schematic diagram of a single-carrier transmission according to Embodiment 4 of the present disclosure, in which two lengths of TTI transmissions exist simultaneously on a carrier, and feedback windows of two length TTIs do not overlap;

FIG. 17 is a schematic diagram of a single-carrier transmission according to Embodiment 5 of the present disclosure, in which two lengths of TTI transmissions exist simultaneously on a carrier, and feedback windows of two length TTIs do not overlap.

detailed description

The technical problems, the technical solutions, and the advantages of the embodiments of the present disclosure will become more apparent from the following detailed description.

Embodiments of the present disclosure provide a method and an apparatus for determining a feedback codebook, which enable a base station and a communication end to determine a size of an ACK/NACK codebook when a feedback location is flexibly notified by a base station.

This embodiment provides a method for determining a feedback codebook. As shown in FIG. 1, the embodiment includes:

Step 101: The communication end according to the maximum feedback window size M corresponding to each TTI length, the minimum feedback delay k, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information. One or more parameters determine the size of the feedback codebook.

In this embodiment, one or more of the maximum feedback window size M, the minimum feedback delay k, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information are determined. The size of the feedback codebook determines the size of the feedback window, and enables the base station and the communication end (such as the terminal) to determine the size of the ACK/NACK codebook when the feedback position is flexibly notified by the base station, and avoids the ACK/NACK code between the base station and the terminal. This size is misunderstood.

Further, the maximum feedback window size M is the maximum possible number of downlink TTIs of the same length that are fed back in the same uplink TTI. The maximum feedback window size M is a predefined value or a value determined by signaling interaction with other communication terminals.

Alternatively, the maximum feedback window size M may be obtained by the communication end according to the number of bits indicating the feedback delay m defined in the downlink scheduling signaling. For example, the M corresponding to the 2-bit m is 4, and the M defining the 3-bit is 8, and the TTIs of different lengths may correspond to different M values.

Further, the minimum feedback delay k is a minimum processing time that is scheduled by the downlink scheduling signaling to schedule downlink data to a feedback information transmission location corresponding to the downlink data, where the minimum feedback delay k is predefined. Values, different lengths of TTI may correspond to different k values.

Further, the TTIs that can be simultaneously transmitted on the carrier are 14 symbols and/or 7 symbols and/or 2 symbols.

Further, the TTI length of the bearer feedback information may be 14 symbols and/or 7 symbols and/or 4 symbols and/or 2 symbols.

When there are multiple lengths of TTIs on the carrier, for each TTI length, the TTI length is determined according to the maximum feedback window size M corresponding to each TTI length and the transmission mode of the carrier. The size of the feedback codebook, the sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; or

In a specific embodiment, the communication terminal may be a terminal, and after determining the size of the feedback codebook, as shown in FIG. 2, the method further includes:

Step 102: Generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at the corresponding feedback position.

In another embodiment, the communication end is a base station, and after determining the size of the feedback codebook, as shown in FIG. 3, the method further includes:

Step 103: Receive feedback information sent by the terminal at a corresponding feedback position according to the determined size of the feedback codebook.

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths overlap, and the shortest TTI length is actually transmitted in the overlapping portion, the feedback information is generated according to the shortest TTI, if the actual transmission is not the shortest in the overlapping portion The TTI length, and the shortest TTI length includes x shortest TTI lengths, and the feedback information corresponding to the shortest TTI length is repeated x times to obtain feedback information of the overlapping portion; or, the The feedback information corresponding to the shortest TTI length is used as the first feedback information, and the remaining positions are supplemented with NACK/DTX; in the non-overlapping portion, the feedback information is generated according to the actually transmitted TTI length.

During single-carrier transmission, the feedback codebook is sorted according to the downlink allocation index DAI indicated in the downlink scheduling signaling to generate feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied. The DAI is a TTI number scheduled in the feedback window, and the number of bits used is determined according to an actual feedback window size; or the DAI may be a 2-bit time domain counter, which is used cyclically.

The embodiment of the present disclosure further provides a determining apparatus for the feedback codebook, as shown in FIG. 4, including:

The processing module 21 is configured to: according to the maximum feedback window size M, the minimum feedback delay k, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the TTI length of the bearer feedback information, which are corresponding to each TTI length. One or more parameters determine the size of the feedback codebook.

In this embodiment, according to the maximum feedback window size M, the minimum feedback delay k, and the carrier can transmit One or more of the length of the transmitted TTI and the number of TTIs that can be transmitted and the length of the TTI that carries the feedback information determine the size of the feedback codebook to determine the feedback window size, which can be flexibly notified by the base station when the feedback position is The base station and the communication end (such as the terminal) are determined to determine the size of the ACK/NACK codebook, so as to avoid misinterpretation of the ACK/NACK codebook size between the base station and the terminal.

Further, the minimum feedback delay k is a predefined value.

In a specific embodiment, the determining device is applied to the terminal. As shown in FIG. 5, the device further includes:

The feedback module 22 is configured to generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at a corresponding feedback position;

In another specific embodiment, the determining device is applied to a base station, as shown in FIG. 6, the device further include:

The receiving module 23 is configured to receive feedback information sent by the terminal at a corresponding feedback position according to the determined size of the feedback codebook.

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. And performing, by the DTX, the feedback information corresponding to the TTIs of the different lengths in the cascading order to generate the feedback information, where the base station and the terminal determine the cascading order of the different length TTI feedback information according to a predefined manner;

In the single carrier transmission, the feedback is based on the downlink allocation index DAI indicated in the downlink scheduling signaling. The codebook is sorted to generate feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied.

In some examples, the determining means of the feedback codebook can include a processor and a memory. The memory can include read only memory or random access memory and provides instructions and data to the processor. A portion of the memory may also include NVRAM (Non Volatile Random Access Memory). The processor and the memory are connected together by a bus system, wherein the bus system includes a power bus, a control bus, a status signal bus, and the like in addition to the data bus. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, the processor may be a general-purpose processor, including a CPU (Central Processing Unit), an NP (Network Processor), or a DSP (Digital Signal Processing). , ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic blocks disclosed in the embodiments of the present disclosure may be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

Specifically, the processor, by executing the program and data stored in the memory, is used for a maximum feedback window size M corresponding to each TTI length, a minimum feedback delay k, a TTI length that can be transmitted on the carrier, and a transmittable One or more of the number of TTI lengths and the length of the TTI carrying the feedback information determines the size of the feedback codebook.

The embodiment of the present disclosure further provides a method for determining a feedback codebook, as shown in FIG. 7, including:

Step 301: The communication end determines a size of the feedback codebook according to predefined information or configuration information, where the configuration information indicates a feedback window size on one or more carriers, and the feedback window transmits data of one or more TTI lengths. .

In this embodiment, the feedback window size is directly determined according to the predefined or configuration information, and the base station and the communication end determine the size of the ACK/NACK codebook when the feedback location is flexibly notified by the base station, so as to avoid the pair between the base station and the terminal. The ACK/NACK codebook size is misunderstood.

The configuration information is semi-statically configured by higher layer signaling, and the base station is in the same feedback resource. The number of TTIs that need to be fed back as indicated by the configuration information is not scheduled.

The configuration information indicates a feedback window size on one or more carriers; data of one or more TTI lengths may be transmitted in the feedback window.

Further, the downlink scheduling index corresponding to the TTI transmitted in the feedback window carries the downlink allocation index DAI. The DAI is a TTI number scheduled in the feedback window, and the number of bits used is determined according to an actual feedback window size; or the DAI may be a 2-bit time domain counter, which is used cyclically.

In a specific embodiment, the communication terminal is a terminal, and the configuration information is sent by the base station to the terminal, and after determining the size of the feedback codebook, as shown in FIG.

Step 302: Generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at a corresponding feedback position.

In another embodiment, the communication end is a base station, and as shown in FIG. 9, after determining the size of the feedback codebook, the method further includes:

Step 303: Receive feedback information sent by the terminal at a corresponding feedback position according to the determined size of the feedback codebook.

The embodiment of the present disclosure further provides a determining device for the feedback codebook, as shown in FIG. 10, including:

The processing module 41 is configured to determine according to predefined information or according to configuration information delivered by the base station The size of the feedback codebook, the configuration information indicating a feedback window size on one or more carriers, the feedback window transmitting data of one or more TTI lengths.

In a specific embodiment, the determining device is applied to the terminal, and the configuration information is sent to the terminal by the base station, as shown in FIG.

The feedback module 42 is configured to generate feedback information according to the determined size of the feedback codebook, and send feedback information to the base station at a corresponding feedback location.

In another embodiment, the determining device is applied to a base station, as shown in FIG. 12, the device further includes:

The receiving module 43 is configured to receive, according to the determined size of the feedback codebook, feedback information sent by the terminal at a corresponding feedback position.

In some embodiments, the determining means of the feedback codebook can include a processor and a memory. The processor, by executing the program and data stored in the memory, is configured to determine a size of the feedback codebook according to the predefined information or configuration information. The configuration information indicates a feedback window size on one or more carriers, and the feedback window transmits data of one or more TTI lengths.

The method for determining the feedback codebook of the present disclosure will be described in detail below with reference to the accompanying drawings and specific embodiments. Introduction:

Example 1:

As shown in FIG. 13, when a single carrier is transmitted and only one length of TTI transmission exists on the carrier, the size of the actual feedback codebook on the carrier is directly determined according to the maximum feedback window size M and the transmission mode of the carrier. Specifically, for the TTI n+7 on the carrier, the maximum feedback window size M is 4, which may be predefined, or notified by the base station, or predefined by the 2-bit information indicating the feedback delay m, according to 2 bits. The information gets a feedback window size of 4. If the terminal receives any one or more TTI downlink data transmissions in the feedback window, it must feed back according to the feedback window size of 4. If the single codeword transmission mode is used, the size of the feedback codebook is 4, if used. In the double code word transmission mode, the size of the feedback codebook is 8.

Example 2:

As shown in FIG. 14, a single carrier transmits and has a TTI of 14 symbol lengths and a TTI of 7 symbol lengths on the carrier, assuming a TTI of 14 symbol lengths and a maximum feedback window size M of TTIs of 7 symbol lengths. 4. The minimum feedback delay k is also 4, and the TTI is used to transmit feedback information with a length of 7 symbols. As shown in FIG. 14 , the feedback windows of the two length TTIs do not overlap, and the feedback window sizes M corresponding to the two lengths TTI are directly added, and the actual feedback window size is 8. If the terminal receives any downlink data transmission of one or more TTIs in the feedback window, it must feed back according to the feedback window size of 8. If the single codeword transmission mode is used, the size of the feedback codebook is 8. If used In the double code word transmission mode, the size of the feedback codebook is 16.

Example 3:

As shown in FIG. 15, a single carrier transmits and has a TTI of 14 symbol lengths and a TTI of 7 symbol lengths on the carrier, assuming a TTI of 14 symbol lengths and a maximum feedback window size M of TTIs of 7 symbol lengths. 4, and using TTI with a length of 7 symbols to transmit feedback information, but the minimum feedback delay k corresponding to the TTI of 14 symbol lengths is 4, and the minimum feedback delay k corresponding to the TTI of 7 symbol lengths is 6. As shown in FIG. 15, for the uplink feedback resource in the second slot (slot) in subframe n+7, the downlink transmission that can be carried is in the downlink subframes n, n+1, n+2, and n+. The TTI of 14 symbol lengths for transmission in 3 and the TTI of 7 symbol lengths for transmission in downlink subframes n+3 and n+4. Wherein, the subframe n+3 is the weight of the feedback window corresponding to the two lengths of the TTI. In the stack part, the size of the feedback codebook can be obtained in two ways:

Manner 1: The feedback window size M corresponding to the two length TTIs is directly added, and the actual feedback window size is 8. If the terminal receives any downlink data transmission of one or more TTIs in the feedback window, it must feed back according to the feedback window size of 8. If the single codeword transmission mode is used, the size of the feedback codebook is 8. If used In the double code word transmission mode, the size of the feedback codebook is 16.

Manner 2: Since the subframe n+3 can be determined to be an overlapping portion of the feedback window corresponding to the TTI of the two lengths, the feedback codebook size is determined according to the shortest TTI length that can be transmitted in the subframe n+3, that is, according to 7 The TTI of the symbol length determines the feedback codebook corresponding to the subframe n+3, and the subframes n, n+1 and n+2 determine the feedback codebook size according to the TTI of 14 symbol lengths, in the subframe n+4 The feedback codebook size is determined based on the TTI of 7 symbol lengths. Therefore, the actual feedback window size corresponding to the second slot feedback resource in subframe n+8 is 7. If the terminal receives any one or more TTI downlink data transmissions in the feedback window, it must feed back according to the feedback window size of 7. If the single codeword transmission mode is used, the size of the feedback codebook is 7. If used In the dual code word transmission mode, the size of the feedback codebook is 14.

Example 4:

As shown in FIG. 16, a single carrier transmission has a TTI of 14 symbol lengths and a TTI of 2 symbol lengths on the carrier, and the maximum feedback window size M of the TTI of 14 symbol lengths is assumed to be 4, 7 symbol length TTIs. The maximum feedback window size M is 16, and the minimum feedback delay k corresponding to the TTI of 14 symbol lengths is 4, the minimum feedback delay k corresponding to the TTI of 2 symbol lengths is 6, and the length is 14 symbol lengths. The TTI transmits feedback information. As shown in FIG. 16, for the uplink feedback resource in subframe n+7, the downlink transmission that can be carried is the length of 14 symbols transmitted in the downlink subframes n, n+1, n+2, and n+3. TTI and TTI of 2 symbol lengths transmitted in downlink subframes n+4 and n+5 and in the first 4 symbols of subframe n+6. If the feedback windows of the two length TTIs do not overlap, the feedback window size M corresponding to the two length TTIs is directly added, and the actual feedback window size is 20. If the terminal receives the downlink data transmission of any one or more TTIs in the feedback window, the feedback window size shall be 20 for feedback. If the single codeword transmission mode is used, the size of the feedback codebook is 20, if used. In the double code word transmission mode, the size of the feedback codebook is 40.

Example 5:

As shown in FIG. 17, a single carrier transmission has a TTI of 14 symbol lengths and a TTI transmission of 7 symbol lengths on the carrier. It is assumed that the base station notifies the terminal that the feedback window size M is 10 through high layer signaling, and the predefined minimum feedback delay is k is 4, and the feedback information is transmitted using a TTI having a length of 7 symbols. As shown in FIG. 17, the base station indicates DAI information by using downlink scheduling signaling in each scheduled TTI. If the base station schedules a total of six TTIs in the feedback window, the DAI information is 1 to 6, respectively, and the DAI can pass 4 The bit information is indicated or the 2-bit information is cyclically indicated, for example, the bit 00 indicates that the DAI is 1 or 5 or 9, the bit 01 indicates that the DAI is 2 or 6 or 10, the bit 10 indicates that the DAI is 3 or 7, and the bit 11 indicates the DAI. It is 0 or 4 or 8. If the terminal receives any one or more TTI downlink data transmissions in the feedback window, the feedback window size shall be 10 for feedback. If the single codeword transmission mode is used, the feedback codebook size is 10, if used. In the double code word transmission mode, the size of the feedback codebook is 20. When generating the feedback information, the terminal feeds back the feedback position corresponding to the previous six TTIs (determined as 6 bits or 12 bits according to the carrier transmission mode) according to the actually received information, and the remaining feedback positions complement the NACK/DTX.

It should be noted that, in the foregoing embodiment, only a single carrier is taken as an example. If multi-carrier transmission is used, on each carrier, a method of calculating a feedback codebook in a single carrier may be used, and finally, a multi-carrier feedback codebook is used. The cascading is used as a feedback codebook sent to the base station, and details are not described herein again.

In the foregoing solution, the feedback is determined according to one or more of the maximum feedback window size M, the minimum feedback delay k, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information. The size of the codebook or directly determines the size of the feedback window according to the predefined or configuration information, and enables the base station and the terminal to determine the size of the ACK/NACK codebook when the feedback location is flexibly notified by the base station, thereby avoiding the ACK between the base station and the terminal. The /NACK codebook size is misunderstood.

Many of the functional components described in this specification are referred to as modules to more particularly emphasize the independence of their implementation.

In embodiments of the present disclosure, modules may be implemented in software for execution by various types of processors. For example, an identified executable code module can comprise one or more physical or logical blocks of computer instructions, which can be constructed, for example, as an object, procedure, or function. Nonetheless, the executable code of the identified modules need not be physically located together, but may include storage on different physics. Different instructions, when these instructions are logically combined, constitute a module and achieve the stated purpose of the module.

In practice, the executable code module can be a single instruction or a plurality of instructions, and can even be distributed across multiple different code segments, distributed among different programs, and distributed across multiple memory devices. As such, operational data may be identified within the modules and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed at different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.

When the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software, and the technician can construct a corresponding hardware circuit to implement the corresponding function without considering the cost. The hardware circuitry includes conventional Very Large Scale Integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components. The modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

In the method embodiments of the present disclosure, the sequence numbers of the steps are not used to limit the sequence of steps. For those skilled in the art, the steps of the steps are changed without any creative work. It is also within the scope of the disclosure.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. It should be considered as the scope of protection of this disclosure.

Claims

A method for determining a feedback codebook includes:

The communication end according to the maximum feedback window size M, the minimum feedback delay k corresponding to each TTI length, the length of the TTI that can be transmitted on the carrier, the number of TTIs that can be transmitted, and the length of the TTI that carries the feedback information The parameters determine the size of the feedback codebook.
The method for determining a feedback codebook according to claim 1, wherein the maximum feedback window size M is a predefined value or a value determined by signaling interaction with other communication terminals; or

The maximum feedback window size M is obtained by the communication end according to the number of bits indicating the feedback delay m defined in the downlink scheduling signaling.
The method of determining a feedback codebook according to claim 1, wherein said minimum feedback delay k is a predefined value.
The method for determining a feedback codebook according to claim 1, wherein the communication terminal is capable of transmitting according to a maximum feedback window size M corresponding to each TTI length, a minimum feedback delay k, and a TTI length that can be transmitted on the carrier. One or more of the number of TTI lengths and the length of the TTI carrying the feedback information determine the size of the feedback codebook includes:

When there is only one length of TTI on the carrier, determining the size of the feedback codebook on the carrier according to the maximum feedback window size M and the transmission mode of the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the feedback codebook corresponding to the TTI length is determined according to the maximum feedback window size M corresponding to each TTI length and the transmission mode of the carrier. The size, the sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the corresponding feedback is determined according to the maximum feedback window size M corresponding to each TTI length, the minimum feedback delay k, and the TTI length of the bearer feedback information. The position of the window; if the positions of the feedback windows corresponding to different TTI lengths do not overlap, the sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier, otherwise, in the overlapping portion The size of the inverse feed codebook is determined according to the shortest TTI length, and the size of the feedback codebook is determined according to the TTI length in the non-overlapping portion.
The method for determining a feedback codebook according to claim 4, wherein the time division duplex system The feedback information bit corresponding to the TTI determined as the uplink transmission in the feedback window is subtracted, and the size of the feedback codebook is obtained.
The method of determining a feedback codebook according to any one of claims 1 to 5, wherein

The communication terminal is a terminal, and after the determining the size of the feedback codebook, the method further includes:

Generating feedback information according to the determined size of the feedback codebook, and transmitting the feedback information to the base station at a corresponding feedback position; or

After the communication end is a base station, after determining the size of the feedback codebook, the method further includes:

Receiving feedback information sent by the terminal at the corresponding feedback position according to the determined size of the feedback codebook.
The method for determining a feedback codebook according to claim 6, wherein the generating the feedback information according to the determined size of the feedback codebook and transmitting the feedback information to the base station at the corresponding feedback position comprises:

Determining a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, m is an indication feedback delay corresponding to the sTTI, and sTTI is a downlink data TTI that needs to be fed back The actual length or minimum TTI length that can be transmitted on the carrier.
The method for determining a feedback codebook according to claim 6, wherein the generating the feedback information according to the determined size of the feedback codebook and transmitting the feedback information to the base station at the corresponding feedback position comprises:

When there is only one length of TTI on a single carrier and the carrier has a TTI, the feedback codebook is sorted according to the TTI in the feedback window, and the TTI is not added to the corresponding location to obtain the feedback information.

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. And performing, by the DTX, the feedback information corresponding to the TTIs of the different lengths in the cascading order to generate the feedback information, where the base station and the terminal determine the cascading order of the different length TTI feedback information according to a predefined manner;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths do not overlap, Then, the feedback information corresponding to different TTI lengths is cascaded in a cascading order;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths overlap, and the shortest TTI length is actually transmitted in the overlapping portion, the feedback information is generated according to the shortest TTI, if the actual transmission is not the shortest in the overlapping portion The TTI length, and the shortest TTI length includes x shortest TTI lengths, and the feedback information corresponding to the shortest TTI length is repeated x times to obtain feedback information of the overlapping portion; or, the The feedback information corresponding to the shortest TTI length is used as the first feedback information, and the remaining positions are supplemented with NACK/DTX; in the non-overlapping portion, the feedback information is generated according to the actually transmitted TTI length;

During single-carrier transmission, the feedback codebook is sorted according to the downlink allocation index DAI indicated in the downlink scheduling signaling to generate the feedback information, and NACK/DTX is added at the end of the feedback information until the determined feedback codebook is satisfied. size.
The method of determining a feedback codebook according to claim 8, wherein

During multi-carrier transmission, feedback information is generated for each of the multiple carriers based on a manner of generating feedback information for the single-carrier transmission, and the generated feedback information is cascaded as feedback sent to the base station. Codebook.
A determining device for a feedback codebook, comprising:

The processing module is configured to: according to a maximum feedback window size M, a minimum feedback delay k corresponding to each TTI length, a TTI length that can be transmitted on the carrier, a number of TTI lengths that can be transmitted, and a TTI length that carries feedback information. One or more parameters determine the size of the feedback codebook.
The determining apparatus of the feedback codebook according to claim 10, wherein the maximum feedback window size M is a predefined value or a value determined by signaling interaction with other communication terminals; or

The maximum feedback window size M is obtained by the processing module according to the number of bits indicating the feedback delay m defined in the downlink scheduling signaling.
The apparatus for determining a feedback codebook according to claim 10, wherein said minimum feedback delay k is a predefined value.
The apparatus for determining a feedback codebook according to claim 10, wherein

The processing module is specifically configured to:

When there is only one length of TTI on the carrier, the size of the feedback codebook on the carrier is determined according to the maximum feedback window size M and the transmission mode of the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the size of the feedback codebook corresponding to the TTI length is determined according to the maximum feedback window size M corresponding to each TTI length and the transmission mode of the carrier. The sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; or

When there are multiple lengths of TTIs on the carrier, for each TTI length, the corresponding feedback is determined according to the maximum feedback window size M corresponding to each TTI length, the minimum feedback delay k, and the TTI length of the bearer feedback information. The position of the window, if the feedback window positions corresponding to different TTI lengths do not overlap, the sum of the sizes of the feedback codebooks corresponding to different TTI lengths is used as the size of the feedback codebook on the carrier; otherwise, the overlapping portions are based on The shortest TTI length determines the size of the feedback codebook, and the size of the feedback codebook is determined according to the TTI length in the non-overlapping portion.
The apparatus for determining a feedback codebook according to claim 13, wherein in the time division duplex system, the processing module is configured to subtract the feedback information bit corresponding to the TTI determined as the uplink transmission in the feedback window to obtain a feedback code. The size of this.
The determining device of the feedback codebook according to any one of claims 10 to 14, wherein the determining device is applied to the terminal, the device further comprising:

a feedback module, configured to generate feedback information according to the determined size of the feedback codebook, and send the feedback information to the base station at a corresponding feedback location;

The determining device is applied to a base station, and the device further includes:

The receiving module is configured to receive the feedback information sent by the terminal at the corresponding feedback position according to the determined size of the feedback codebook.
The apparatus for determining a feedback codebook according to claim 15, wherein

The feedback module is specifically configured to determine a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, m is an indication feedback delay corresponding to the sTTI, and sTTI is required The actual length of the downlink data TTI to be fed back or the minimum TTI length that can be transmitted on the carrier.
The apparatus for determining a feedback codebook according to claim 15, wherein

The feedback module is specifically configured to:

When there is only one length of TTI on the single-carrier transmission and the carrier has a TTI, the feedback codebook is sorted according to the TTI in the feedback window, and the NTI/DTX is added to the corresponding location to obtain the feedback information.

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. And performing, by the DTX, the feedback information corresponding to the TTIs of the different lengths in the cascading order to generate the feedback information, where the base station and the terminal determine the cascading order of the different length TTI feedback information according to a predefined manner;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths do not overlap, the feedback information corresponding to different TTI lengths is cascaded in a cascading order;

When a single carrier is transmitted and there are multiple lengths of TTIs on the carrier, the feedback codebook is sequentially sorted according to the TTI in the feedback window for each length of TTI, and the NACK is added to the corresponding location for the TTI that does not receive the information. DTX, if the feedback window positions corresponding to different TTI lengths overlap, and the shortest TTI length is actually transmitted in the overlapping portion, the feedback information is generated according to the shortest TTI, if the actual transmission is not the shortest in the overlapping portion The TTI length, and the shortest TTI length includes x shortest TTI lengths, and the feedback information corresponding to the shortest TTI length is repeated x times to obtain feedback information of the overlapping portion; or, the The feedback information corresponding to the shortest TTI length is used as the first feedback information, and the remaining positions are supplemented with NACK/DTX; in the non-overlapping portion, the feedback information is generated according to the actually transmitted TTI length;

During single-carrier transmission, the feedback codebook is sorted according to the downlink allocation index DAI indicated in the downlink scheduling signaling to generate feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied.
The apparatus for determining a feedback codebook according to claim 17, wherein

In the multi-carrier transmission, the feedback module is configured to separately generate feedback information for each of the multiple carriers, and cascade the generated feedback information as a feedback codebook sent to the base station.
A method for determining a feedback codebook includes:

The communication end determines the size of the feedback codebook according to the predefined information or configuration information, and the configuration information The information indicates a feedback window size on one or more carriers that transmit data of one or more TTI lengths.
The method for determining a feedback codebook according to claim 19, wherein the downlink scheduling index corresponding to the TTI transmitted in the feedback window carries a downlink allocation index DAI.
The method for determining a feedback codebook according to claim 19 or 20, wherein the communication terminal is a terminal, and the configuration information is sent by the base station to the terminal, after the determining the size of the feedback codebook, The method also includes:

Generating feedback information according to the determined size of the feedback codebook, and transmitting the feedback information to the base station at a corresponding feedback position;

After the communication end is a base station, after determining the size of the feedback codebook, the method further includes:

Receiving feedback information sent by the terminal at the corresponding feedback position according to the determined size of the feedback codebook.
The method for determining a feedback codebook according to claim 21, wherein the generating the feedback information according to the determined size of the feedback codebook and transmitting the feedback information to the base station at the corresponding feedback position comprises:

Determining a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, m is an indication feedback delay corresponding to the sTTI, and sTTI is a downlink data TTI that needs to be fed back The actual length or minimum TTI length that can be transmitted on the carrier.
The method for determining a feedback codebook according to claim 21, wherein the generating the feedback information according to the determined size of the feedback codebook and transmitting the feedback information to the base station at the corresponding feedback location comprises:

During single-carrier transmission, the feedback codebook is sorted according to the DAI indicated in the downlink scheduling signaling to generate the feedback information, and NACK/DTX is added at the end of the feedback information until the size of the determined feedback codebook is satisfied.
The method of determining a feedback codebook according to claim 23, wherein

During multi-carrier transmission, the feedback information is separately generated for each of the multiple carriers based on a manner of generating feedback information for the single-carrier transmission, and the generated feedback information is cascaded as being sent to the base station. Feedback codebook.
A determining device for a feedback codebook, comprising:

a processing module, configured to determine a size of the feedback codebook according to predefined information or configuration information, where the configuration information indicates a feedback window size on one or more carriers, and the feedback window transmits data of one or more TTI lengths .
The apparatus for determining a feedback codebook according to claim 25, wherein the downlink scheduling index corresponding to the TTI transmitted in the feedback window carries a downlink allocation index DAI.
The apparatus for determining a feedback codebook according to claim 25 or 26, wherein

The determining device is applied to the terminal, and the configuration information is sent by the base station to the terminal, and the device further includes:

a feedback module, configured to generate feedback information according to the determined size of the feedback codebook, and send the feedback information to the base station at a corresponding feedback location;

The determining device is applied to a base station, and the device further includes:

The receiving module is configured to receive the feedback information sent by the terminal at the corresponding feedback position according to the determined size of the feedback codebook.
The apparatus for determining a feedback codebook according to claim 27, wherein

The feedback module is specifically configured to determine a feedback position corresponding to each sTTI according to k*sTTI+m*sTTI, where k is a minimum feedback delay corresponding to the sTTI, m is an indication feedback delay corresponding to the sTTI, and sTTI is required The actual length of the downlink data TTI to be fed back or the minimum TTI length that can be transmitted on the carrier.
The apparatus for determining a feedback codebook according to claim 27, wherein

The feedback module is specifically configured to: when the single carrier transmits, sort the feedback code according to the DAI indicated in the downlink scheduling signaling to generate feedback information, and supplement the NACK/DTX at the end of the feedback information until the determined feedback codebook is satisfied. size.
The apparatus for determining a feedback codebook according to claim 29, wherein

In the multi-carrier transmission, the feedback module is configured to separately generate feedback information for each carrier, and cascade the generated feedback information as a feedback codebook sent to the base station.
A determining device for a feedback codebook, comprising a processor and a memory, wherein:

The processor, by executing the program and data stored in the memory, for using a maximum feedback window size M corresponding to each TTI length, a minimum feedback delay k, a TTI length that can be transmitted on the carrier, and capable of transmitting One of the number of TTI lengths and the length of the TTI carrying the feedback information or A plurality of parameters determine the size of the feedback codebook.
A determining device for a feedback codebook, comprising a processor and a memory, wherein:

The processor, configured to determine a size of a feedback codebook according to predefined information or configuration information by executing a program and data stored in the memory, the configuration information indicating a feedback window size on one or more carriers The feedback window transmits data of one or more TTI lengths.