CN107370570B

CN107370570B - Feedback information transmission method, UE, base station and system

Info

Publication number: CN107370570B
Application number: CN201610319163.5A
Authority: CN
Inventors: 司倩倩; 潘学明; 高雪娟; 郑方政
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2021-04-06
Anticipated expiration: 2036-05-13
Also published as: WO2017193946A1; CN107370570A

Abstract

The invention provides a feedback information transmission method, UE, a base station and a system, wherein the method comprises the following steps: UE generates feedback information of a target subframe; and the UE transmits the feedback information to the base station in the next subframe of the target subframe, wherein the transmission of the feedback information in the embodiment of the invention can be suitable for a short TTI or a TTI with a variable length.

Description

Feedback information transmission method, UE, base station and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a feedback information transmission method, a User Equipment (UE), a base station, and a system.

Background

As the demand for mobile communication services changes, many communication organizations define higher user plane delay performance requirements for future mobile communication systems. The main method for shortening the ductility performance at the user plane is to reduce the length of a Transmission Time Interval (TTI), i.e., a short TTI or a TTI with a variable length may occur in the future. For example: one subframe may contain a plurality of TTIs. However, the current transmission schemes for feedback information are based on the existing fixed length TTI for feedback, for example: the feedback information of the subframe n is fed back in the subframe n + 4. For short TTI or variable-length TTI, there may be many TTIs between subframe n and subframe n +4, so that the transmission performance of the feedback information is low. It can be seen that the existing transmission of feedback information is not suitable for short TTI or variable length TTI.

Disclosure of Invention

The invention aims to provide a feedback information transmission method, UE, a base station and a system, which solve the problem that the transmission of feedback information cannot be suitable for a short TTI (transmission time interval) or a TTI with a variable length.

In order to achieve the above object, an embodiment of the present invention provides a feedback information transmission method, including:

UE generates feedback information of a target subframe;

the UE transmits the feedback information to a base station in a next subframe of the target subframe.

Optionally, the feedback information includes:

positive ACKnowledgement (ACK) feedback information of Hybrid Automatic Repeat request (HARQ) or Negative ACKnowledgement (NACK) feedback information of HARQ.

Optionally, the UE generates feedback information of a target subframe, including:

and the UE determines the codebook size of the feedback information of the target subframe and generates the feedback information of the target subframe according to the codebook size.

Optionally, the determining, by the UE, the codebook size of the feedback information of the target subframe includes:

the UE determines the codebook size of the feedback information of the target subframe according to specific information, wherein the specific information comprises one or more of the following information:

the maximum Downlink TTI number, the number of configured carriers, Downlink Assignment Index (DAI) information indicated by the base station, high-level signaling and the number of transmission blocks of the target subframe can be transmitted.

Optionally, if the target subframe is a downlink subframe, the maximum number of TTIs that can be transmitted by the target subframe is the maximum number of TTIs that can be included by the target subframe; or

If the target subframe is a special subframe, the maximum number of TTIs (transmission time intervals) which can be transmitted by the target subframe is the maximum number of TTIs which can be contained in a downlink time slot of the target subframe, and the special subframe at least comprises the downlink time slot and a protection interval; or

If downlink data with different TTI lengths exist in the target subframe, the maximum transmittable TTI number of the target subframe is the maximum transmittable basic TTI number in the target subframe, the length of the basic TTI is K Orthogonal Frequency Division Multiplexing (OFDM) symbols, and K is an integer greater than or equal to 1; or

If the base station configures a plurality of downlink carriers for the UE, the maximum number of transmittable TTIs of the target subframe is determined on the plurality of downlink carriers, respectively, or the maximum number of transmittable TTIs of the target subframe is the maximum number of transmittable TTIs of the plurality of downlink carriers transmitted in the target subframe.

Optionally, the DAI information indicated by the base station includes one or more of the following:

the counting Downlink configuration Index value of the time domain counts the Downlink configuration Index value (C-DAI, Count Downlink Assignment Index), the Total Downlink configuration Index value (T-DAI, Total Downlink Assignment Index) and the C-DAI of the frequency domain and the time domain.

Optionally, the C-DAI in the frequency domain and the time domain is a TTI index of downlink data scheduled by the base station, and the C-DAI in the frequency domain and the time domain counts the scheduled TTIs according to a sequence of the frequency domain and the time domain;

the T-DAI is the total number of all downlink subframes which need to be fed back by the UE in the uplink subframes, and the T-DAI is updated in each subframe in the time domain;

the C-DAI of the time domain is the TTI index of downlink data which is only scheduled in the time domain by the base station, and the C-DAI of the time domain counts the TTIs scheduled in the time domain according to the time sequence.

Optionally, the number of the high layer signaling and/or the transport blocks is used to determine the number of feedback bits of each TTI in the target subframe, where:

the high-level signaling is used for indicating whether code word combination is used or not, if the code word combination is used, the feedback bit number of each TTI in the target subframe is 1, and if the code word combination is not used, the feedback bit number of each TTI in the target subframe is determined by a carrier transmission mode; or

The high-level signaling is used for indicating the feedback bit number of each TTI in the target subframe; or

And the number of the transmission blocks is the feedback bit number of each TTI in the target subframe.

Optionally, the UE generates feedback information of the target subframe according to the size of the codebook, including:

the UE cascades feedback bits of a target subframe in at least one carrier to obtain a codebook with the size of the codebook so as to generate feedback information of the target subframe, wherein the feedback bits of the target subframe in each carrier are sequenced according to TTI (transmission time interval) numbers; or

The UE sorts the feedback bits of the target subframe according to DAI information to obtain a codebook of the size of the codebook so as to generate the feedback information of the target subframe; or

And the UE concatenates the feedback bits of the target subframe in at least one carrier to obtain a codebook with the size of the codebook so as to generate the feedback information of the target subframe, wherein the feedback bits of each carrier are sequenced according to the DAI information.

Optionally, the TTI numbers are numbers according to an actual TTI transmission sequence; or

The TTI serial number is serial number according to basic TTI sequence, the length of the basic TTI is K OFDM symbols, and K is an integer greater than or equal to 1.

Optionally, when the TTI numbers are numbers according to a basic TTI sequence, the number of the TTI received by the UE is a number of a basic TTI to which a first OFDM symbol of the TTI belongs.

Optionally, the UE transmits the feedback information to the base station in a next subframe of the target subframe, where the transmitting includes:

the UE transmits the feedback information to a base station in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1; or

And the UE transmits the feedback information to a base station in a specific resource in a next subframe of the target subframe, wherein the specific resource is determined by the TTI length and the position of downlink transmission in the target subframe, or the specific resource is indicated by high-level signaling and/or signaling of scheduling downlink TTI.

the UE transmits the feedback information to a base station in a format of a Short Physical Uplink Control Channel (s PUCCH) in a next subframe of the target subframe; or

And the UE transmits the feedback information to a base station in a format of a Short Physical Uplink Shared Channel (s PUSCH) in a next subframe of the target subframe.

Optionally, the target subframe is a time period including z OFDM symbols in a time domain, a next subframe of the target subframe is a time period next to the time period of the target subframe in the time domain, and z is a positive integer greater than or equal to 1.

The embodiment of the invention also provides a feedback information transmission method, which comprises the following steps:

the method comprises the steps that a base station receives feedback information transmitted by UE in a next subframe of a target subframe, wherein the feedback information is generated by the UE and is of the target subframe.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the feedback information of the target subframe includes:

and the UE generates the feedback information of the target subframe according to the determined codebook size of the feedback information of the target subframe.

Optionally, the codebook size includes:

the maximum downlink TTI number which can be transmitted by the target subframe, the number of configuration carriers, DAI information indicated by the base station, high-level signaling and the number of transmission blocks.

If downlink data with different TTI lengths exist in the target subframe, the maximum transmittable TTI number of the target subframe is the maximum transmittable basic TTI number in the target subframe, the length of the basic TTI is K OFDM symbols, and K is an integer greater than or equal to 1; or

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the feedback information of the target subframe includes:

The UE sorts the feedback bits of the target subframe according to DAI information to obtain a codebook of the size of the codebook so as to generate feedback information of the target subframe; or

And the UE concatenates feedback bits of a target subframe in at least one carrier to obtain a codebook of the size of the codebook so as to generate feedback information of the target subframe, wherein the feedback bits of each carrier are sequenced according to DAI information.

Optionally, the receiving, by the base station, feedback information transmitted by the UE in a next subframe of the target subframe includes:

the base station receives the feedback information transmitted by the UE in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1; or

And the base station receives the feedback information transmitted by the UE in a specific resource in the next subframe of the target subframe, wherein the specific resource is determined by the TTI length and the position of downlink transmission in the target subframe, or the specific resource is indicated by high-level signaling and/or signaling of scheduling downlink TTI.

the base station receives the feedback information transmitted by the UE in the next subframe of the target subframe by adopting an s PUCCH format; or

And the base station receives the feedback information transmitted by the UE in the next subframe of the target subframe by adopting an s PUSCH format.

An embodiment of the present invention further provides a UE, including:

the generating module is used for generating feedback information of the target subframe;

a transmission module, configured to transmit the feedback information to a base station in a next subframe of the target subframe.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the generating module is configured to determine a codebook size of the feedback information of the target subframe, and generate the feedback information of the target subframe according to the codebook size.

Optionally, the generating module is configured to determine a codebook size of feedback information of the target subframe according to specific information, where the specific information includes one or more of the following:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the generating module is configured to cascade feedback bits of a target subframe in at least one carrier to obtain a codebook of the codebook size, so as to generate feedback information of the target subframe, where the feedback bits of the target subframe in each carrier are sorted according to a TTI number; or

The generating module is used for sequencing the feedback bits of the target subframe according to DAI information to obtain a codebook of the size of the codebook so as to generate the feedback information of the target subframe; or

The generating module is configured to concatenate feedback bits of a target subframe in at least one carrier to obtain a codebook of the codebook size, so as to generate feedback information of the target subframe, where the feedback bits of each carrier are sorted according to DAI information.

Optionally, the transmission module is configured to transmit the feedback information to a base station in the last x OFDM symbols in a next subframe of the target subframe, where x is an integer greater than or equal to 1; or

The transmission module is configured to transmit the feedback information to a base station in a specific resource in a next subframe of the target subframe, where the specific resource is determined by a TTI length and a position of downlink transmission in the target subframe, or the specific resource is indicated by high-layer signaling and/or signaling of scheduling downlink TTI.

Optionally, the transmission module is configured to transmit the feedback information to the base station in an s PUCCH format in a next subframe of the target subframe; or

And the transmission module is used for transmitting the feedback information to the base station by adopting an sUSCH format in the next subframe of the target subframe.

An embodiment of the present invention further provides a base station, including:

a receiving module, configured to receive feedback information transmitted by a UE in a next subframe of a target subframe, where the feedback information is feedback information of the target subframe generated by the UE.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the feedback information of the target subframe includes:

Optionally, the codebook size includes:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the feedback information of the target subframe includes:

Optionally, the receiving module is configured to receive the feedback information transmitted by the UE in the last x OFDM symbols in the next subframe of the target subframe, where x is an integer greater than or equal to 1; or

The receiving module is configured to receive the feedback information transmitted by the UE in a specific resource in a next subframe of the target subframe, where the specific resource is determined by a TTI length and a position of a downlink transmission in the target subframe, or the specific resource is indicated by a higher layer signaling and/or a signaling of a scheduling downlink TTI.

Optionally, the receiving module is configured to receive the feedback information transmitted by the UE in an s PUCCH format in a next subframe of the target subframe; or

The receiving module is configured to receive the feedback information transmitted by the UE in the s PUSCH format in the next subframe of the target subframe.

An embodiment of the present invention further provides a feedback information transmission system, including:

the UE is used for generating feedback information of the target subframe;

the UE transmits the feedback information to a base station in a next subframe of the target subframe;

the base station is configured to receive the feedback information transmitted by the UE in a subframe next to a target subframe.

The technical scheme of the invention at least has the following beneficial effects:

UE generates feedback information of a target subframe; the UE transmits the feedback information to a base station in a next subframe of the target subframe. The feedback information of the target subframe is transmitted in the next subframe of the target subframe, so that the feedback information of each TTI in the subframe can be fed back to the base station in time.

Drawings

Fig. 1 is a schematic diagram of a network structure provided by an embodiment of the present invention;

fig. 2 is a flowchart illustrating a feedback information transmission method according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating another feedback information transmission method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a feedback information transmission according to an embodiment of the present invention;

fig. 5 is a diagram illustrating another feedback information transmission provided by an embodiment of the present invention;

fig. 6 is a diagram illustrating another feedback information transmission provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another UE according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another base station according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a feedback information transmission system according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic diagram of a network structure provided in an embodiment of the present invention, as shown in fig. 1, including a base station 11 and a UE 12. The base station 11 may be an evolved Node B (eNB) or other base stations, and it should be noted that a specific type of the base station 12 is not limited in this embodiment of the present invention. The base station 11 may establish communication with the UE12, where the network in the drawing may indicate that the base station 11 may establish communication with the UE12 wirelessly, and the UE12 may be a terminal Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a specific type of the UE12 is not limited in the embodiment of the present invention.

Based on the network structure shown in fig. 1, an embodiment of the present invention provides a feedback information transmission method, as shown in fig. 2, including the following steps:

201. UE generates feedback information of a target subframe;

202. and the UE transmits the feedback information to the base station in the next subframe of the target subframe.

In this embodiment, the target subframe may be any subframe in a mobile communication system, and the subframe may include a short TTI, or may include a TTI with a variable length, or may further include a TTI with a fixed length. In addition, the target subframe may further include one or more TTIs, and when the target subframe includes a plurality of TTIs, the plurality of TTIs may be TTIs with different lengths, or TTIs with the same length, and the like, which is not limited in this embodiment.

In addition, the next subframe of the target subframe may be understood as a subframe subsequent to the target subframe, for example: the target subframe is subframe n-1, and the next subframe is subframe n. The feedback information of the target subframe is transmitted in the next subframe, so that the feedback information of the target subframe can be fed back to the base station in time. For example: when the target subframe comprises a plurality of TTIs, the feedback information of the plurality of TTIs can be transmitted to the base station in time, so that the feedback information transmission method can be suitable for short TTIs or TTIs with variable lengths.

Optionally, the feedback information may include:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Therefore, the transmission of the HARQ ACK feedback information or the HARQ NACK feedback information of the target subframe in the next subframe can be realized. Of course, in this embodiment, the feedback information is not limited to ACK feedback information of HARQ or NACK feedback information of HARQ, and may also be other ACK feedback information or NACK feedback information that needs to be fed back to the base station, which is not limited in this embodiment.

Optionally, the generating, by the UE, the feedback information of the target subframe may include:

In this embodiment, the codebook size may be temporarily determined based on some information, or may be preset by the UE. In addition, the generating of the feedback information of the target subframe according to the size of the codebook may be understood as generating the feedback information of the target subframe of which the codebook has the size. Wherein, the feedback information of the target subframe may be some bits composed of 0 and 1. In addition, in some scenarios, the feedback information generated by the UE to the target subframe may also be generated by other manners, for example: the UE generates feedback information of a target subframe of a fixed format or a fixed size, and the like, which is not limited in this embodiment.

Optionally, in this embodiment, the determining, by the UE, the codebook size of the feedback information of the target subframe may include:

In this embodiment, determining the codebook size of the feedback information of the target subframe according to the one or more information may be implemented, for example: when determining the codebook size of the feedback information of the target subframe according to any one of the information, the codebook size of the feedback information of the target subframe may be determined according to a preset mapping relationship between the information and the codebook size; or determining the codebook size of the feedback information of the target subframe according to various information therein, for example: the codebook size is determined according to the number of transmittable maximum downlink Transmission Time Intervals (TTI) and the number of transmission blocks, or the codebook size may be determined according to the number of transmittable maximum downlink Transmission Time Intervals (TTI), the number of configured carriers and the number of transmission blocks, or the codebook size may be determined according to the DAI information and the high-level signaling indicated by the base station, or the codebook size may be determined according to the downlink configuration index value (DAI) information and the number of transmission blocks indicated by the base station, and the like. The codebook size may be obtained by performing a predetermined operation on at least two kinds of information of the plurality of kinds of information to determine the codebook size of the feedback information of the target, for example: the codebook size of the feedback information of the target subframe is a product of the maximum downlink TTI number and the number of the transmission blocks, or the codebook size of the feedback information of the target subframe is a product of the maximum downlink TTI number and the number of the transmission blocks, and the like, which is not limited in this embodiment.

Optionally, in the foregoing embodiment, if the target subframe is a downlink subframe, the maximum number of TTIs that can be transmitted by the target subframe is the maximum number of TTIs that can be included by the target subframe.

In this embodiment, the maximum number of TTIs that can be included in the target subframe can be set as the maximum number of TTIs that can be transmitted in the target subframe. The maximum number of TTIs that the target subframe may include may be understood as the maximum number of TTIs that the target subframe may include.

Optionally, in the foregoing embodiment, if the target subframe is a special subframe, the maximum number of TTIs that can be transmitted in the target subframe is the maximum number of TTIs that can be included in the downlink timeslot of the target subframe, and the special subframe at least includes a downlink timeslot and a guard interval.

In this embodiment, the target subframe is a special subframe, that is, the target subframe at least includes a Downlink timeslot and a Guard Period (GP), where the Downlink gap may be a Downlink transmission timeslot (DwPTS). Of course, in some scenarios, the target subframe may further include an Uplink transmission Time Slot (UpPTS). In this embodiment, the maximum number of TTIs that can be included in the downlink slot of the target subframe may be set as the maximum number of TTIs that can be transmitted in the target subframe.

Optionally, in the foregoing embodiment, if downlink data with different TTI lengths exists in the target subframe, the maximum number of TTIs that can be transmitted in the target subframe is the maximum number of basic TTIs that can be transmitted in the target subframe, where the length of the basic TTI is K OFDM symbols, and K is an integer greater than or equal to 1.

In this embodiment, the basic TTI may be predefined, for example: the basic TTI is a TTI of 2 OFDM symbols in length. In this embodiment, the maximum number of transmittable basic TTIs in the target-subframe may be set as the maximum number of transmittable TTIs in the target-subframe. For example: the target-sub-frame comprises 10 OFDM symbols and the target-sub-frame comprises 4 TTIs occupying 3, 2 and 3 OFDM symbols respectively, if the basic TTI length is 2 OFDM symbols, then the maximum transmittable basic TTI number of the target-sub-frame is 5, i.e. the maximum transmittable TTI number of the target-sub-frame is 5.

Optionally, in the foregoing embodiment, if the base station configures multiple downlink carriers for the UE, the maximum number of transmittable TTIs of the target subframe is determined on the multiple downlink carriers, respectively, or the maximum number of transmittable TTIs of the target subframe is the maximum number of transmittable TTIs of the multiple downlink carriers in the target subframe.

In this embodiment, when the UE configures multiple downlink carriers, then, the maximum number of transmittable TTIs of the target subframes of the multiple downlink carriers may be respectively determined, for example: the maximum number of transmittable TTIs of the target subframe of each downlink carrier may be the respective maximum number of transmittable TTIs. For example: the plurality of downlink carriers include carrier 1 and carrier 2, the target subframe of carrier 1 includes 5 TTIs, and the target subframe of carrier 2 includes 6 TTIs, so that the maximum number of TTIs that can be transmitted for the target subframe of carrier 1 is 5, and the maximum number of TTIs that can be transmitted for the target subframe of carrier 2 is 6.

In this embodiment, the maximum downlink TTI transmitted in the target subframe in the plurality of downlink carriers may be set as the maximum number of transmittable TTIs of the target subframe, for example: the plurality of downlink carriers include carrier 1 and carrier 2, the target subframe of carrier 1 includes 5 TTIs, and the target subframe of carrier 2 includes 6 TTIs, so that the maximum number of TTIs that can be transmitted in the target subframe is 6.

Optionally, in the foregoing embodiment, the DAI information indicated by the base station may include one or more of the following:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

In this embodiment, determining the codebook size of the feedback information of the target subframe according to one or more of the C-DAI in the time domain, the T-DAI in the time domain, and the C-DAI in the frequency domain and the time domain may be implemented, for example: under the condition of double-codeword transmission, 2 times of C-DAI in the time domain, T-DAI or C-DAI in the frequency domain and the time domain can be used as the codebook size of the target subframe, or the product of the C-DAI in the time domain, T-DAI or C-DAI in the frequency domain and the time domain and the number of transmission blocks can be used as the codebook size of the target subframe. For example: under the condition of dual codeword transmission, the base station schedules downlink transmission in downlink TTI 3 in subframe n-1 of carrier 1, corresponding frequency domain and time domain counts C-DAI are 1, T-DAI is 1, downlink transmission in downlink TTIs 5-7 is scheduled in subframe n-1 of carrier 2, corresponding frequency domain and time domain counts C-DAI are 2, 3 and 4, respectively, corresponding T-DAI are 2, 3 and 4, respectively, and then the codebook size of subframe n-1 is 4 × 2. If the UE does not receive TTI 3 on carrier 1, but correctly receives all TTIs of carrier 2, the terminal generates feedback bit 00111111 according to the DAI information, and sends the feedback information in sPUCCH in subframe n.

Optionally, in the foregoing embodiment, the C-DAI in the frequency domain and the time domain may be a TTI index of downlink data scheduled by the base station, and the C-DAI in the frequency domain and the time domain counts scheduled TTIs according to an order of a frequency domain and a time domain.

The T-DAI may be a total number of all downlink subframes that the UE needs to feed back in an uplink subframe, and the T-DAI is updated in each subframe in a time domain.

The C-DAI of the time domain may be a TTI index of only downlink data scheduled in the time domain by the base station, and the C-DAI of the time domain counts TTIs scheduled in the time domain in a time sequence.

Optionally, in the foregoing embodiment, the number of the higher layer signaling and/or the transport blocks is used to determine the number of feedback bits per TTI in the target subframe, where:

In this embodiment, the determination of the number of feedback bits per TTI in the target subframe according to higher layer signaling and/or the number of transport blocks may be implemented, for example: determining the feedback bit number of each TTI to be 1 bit, the codebook size of the target subframe may be the maximum number of TTIs that can be transmitted in the target subframe, and determining the feedback bit number of each TTI to be 2 bits, the codebook size of the target subframe may be 2 times the maximum number of TTIs that can be transmitted in the target subframe. In addition, the feedback bit number of each TTI in the target subframe is determined by the carrier transmission mode, and it can be understood that, when the carrier transmission mode is the dual-codeword transmission mode, the feedback bit number of each TTI in the target subframe is 2, and when the carrier transmission mode is the single-codeword transmission mode, the feedback bit number of each TTI in the target subframe is 1.

In addition, the high layer signaling is used for indicating the feedback bit number of each TTI in the target subframe, and the base station can indicate that 1-bit or 2-bit information is fed back in each TTI of each carrier in the feedback information of the target subframe through the high layer signaling regardless of the configured transmission mode.

Optionally, the generating, by the UE, the feedback information of the target subframe according to the size of the codebook may include:

and the UE cascades the feedback bits of the target subframe in at least one carrier to obtain a codebook with the size of the codebook so as to generate the feedback information of the target subframe, wherein the feedback bits of the target subframe in each carrier are sequenced according to the TTI number.

In this embodiment, the feedback bits of the target subframe in one or more carriers may be concatenated according to the carrier number to obtain the codebook of the codebook size, so as to generate the feedback information of the target subframe. In addition, the feedback bits of the target subframe in each carrier are sorted according to the TTI number, so that the feedback bits of the target subframe comprising a plurality of TTIs in each carrier can be fed back to the base station. For example: the base station schedules downlink transmission in downlink TTIs 0-5 in a subframe n-1 of a carrier 1, schedules downlink transmission in downlink TTIs 0-7 in a subframe n-1 of a carrier 2, if the UE correctly receives all the TTIs, a feedback bit of the subframe n-1 of the carrier 1 is 1111110000, a feedback bit of the subframe n-1 of the carrier 2 is 111111110, and the UE can send feedback information after two-stage bit cascade in the sPUCCH of the subframe n of the carrier 1.

Optionally, in the foregoing embodiment, the TTI number may be a number according to an actual transmission order of TTIs; or

In this embodiment, the TTI numbering may be performed according to actually transmitted TTIs, for example: the base station schedules 4 downlink TTIs in a carrier 1 subframe n-1, and respectively occupies 3, 2 and 3 OFDM symbols, and the 4 downlink TTIs are numbered 1, 2, 3 and 4 respectively.

In this embodiment, the TTI numbers may be numbers in the basic TTI order.

Optionally, in this embodiment, when the TTI numbers are numbers according to a basic TTI sequence, the number of the TTI received by the UE may be a number of a basic TTI to which a first OFDM symbol of the TTI belongs.

For example: the base station schedules 3 downlink TTIs in a carrier 1 subframe n-1, and respectively occupies 3, 3 and 4 OFDM symbols, and the basic TTI length is 2 OFDM symbols, so the numbers of the 3 TTIs are 1, 2 and 4, respectively.

and the UE sorts the feedback bits of the target subframe according to DAI information to obtain a codebook with the size of the codebook so as to generate the feedback information of the target subframe.

In this embodiment, sorting the feedback bits according to the DAI information may be implemented to generate the feedback information of the target subframe. For example: under the condition of dual-codeword transmission, a base station schedules downlink transmission in downlink TTIs 5-7 in a subframe n-1 of a carrier 1, corresponding frequency domain and time domain counts C-DAI are respectively 1, 2 and 3, corresponding T-DAI are also respectively 1, 2 and 3, and the codebook size of the subframe n-1 is 3 x 2. If the UE does not receive TTI 6 on carrier 1, but correctly receives TTI5 and TTI7, the UE generates 110011 feedback bits according to the DAI information and sends the feedback information in the sUCCH of subframe n.

In this embodiment, the feedback bits of the target subframe in one or more carriers may be concatenated according to the carrier number to obtain the codebook of the codebook size, so as to generate the feedback information of the target subframe. In addition, the feedback bits of each carrier are sorted according to the DAI information, so that the feedback bits of the target subframe including a plurality of TTIs in each carrier can be fed back to the base station. For example: under the condition of dual codeword transmission, the base station schedules downlink transmission in downlink TTI 3 in subframe n-1 of carrier 1, corresponding frequency domain and time domain counts C-DAI are 1, T-DAI is 1, downlink transmission in downlink TTIs 5-7 is scheduled in subframe n-1 of carrier 2, corresponding frequency domain and time domain counts C-DAI are 2, 3 and 4, respectively, corresponding T-DAI are 2, 3 and 4, respectively, and then the codebook size of subframe n-1 is 4 × 2. If the UE does not receive TTI 3 on carrier 1, but correctly receives all TTIs of carrier 2, the terminal generates feedback bit 00111111 according to the DAI information, and sends the feedback information in sPUCCH in subframe n.

Optionally, the UE transmits the feedback information to the base station in a next subframe of the target subframe, which may include:

and the UE transmits the feedback information to a base station in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1.

In this embodiment, it may be achieved that the feedback information of the target subframe is transmitted in the last x OFDM symbols in the next subframe. It may be that the feedback information of the target subframe is transmitted in the last 1 or 2 or 3 OFDM symbols. In addition, in this embodiment, the feedback information may also be transmitted in the sPUCCH format or the s PUSCH format.

and the UE transmits the feedback information to the base station in a specific resource in the next subframe of the target subframe, wherein the specific resource is determined by the TTI length and the position of downlink transmission in the target subframe, or the specific resource is indicated by high-layer signaling and/or signaling of scheduling downlink TTI.

In this embodiment, the transmission of the feedback information on the specific resource may be implemented. The specific resource can be determined by the TTI length and the position of the downlink transmission in the target subframe, that is, the transmission resource can be implicitly obtained by the TTI length and the position of the downlink transmission in the target subframe. Specifically, the specific transmission resource may be determined according to a corresponding relationship between the TTI length and position of downlink transmission in the target subframe and the transmission resource. In addition, in this embodiment, the specific resource may also be indicated by a higher layer signaling and/or a signaling of scheduling the downlink TTI, for example: the base station may send a high-level signaling indicating a transmission resource for transmitting feedback information of the target subframe to the UE, or the base station may send a signaling for scheduling downlink TTI to the UE, and the UE may transmit the feedback information of the target subframe on the resource indicated by the signaling upon receiving the signaling.

the UE transmits the feedback information to a base station in a next subframe of the target subframe by adopting an sPUCCH format; or

And the UE transmits the feedback information to the base station in the next subframe of the target subframe by adopting an sUSCH format.

In this embodiment, it may be implemented that the feedback information is transmitted to the base station in sPUCCH or sPUSCH format. For example: in the subframe n, the UE may transmit feedback information of the subframe n-1 through the sPUCCH; or, if the UE does not support sPUCCH, the feedback information of subframe n-1 may also be transmitted through sPUSCH in subframe n.

In this embodiment, it may be implemented that the target-subframe and the next subframe of the target-subframe are a time period that is not a subframe in time, for example: the target subframe is a time period n-1, and the next subframe of the target subframe is a time period n, that is, feedback information of the time period n-1 can be fed back in the time period n. In addition, the time segment including z OFDM symbols may be understood as that the time segment includes only z OFDM symbols, that is, the target subframe and the next subframe of the target subframe may include only z OFDM symbols, for example: only include 4 OFDM symbols or 6 OFDM symbols or 8 OFDM symbols, etc., which is not limited.

In the embodiment, the UE generates feedback information of a target subframe; the UE transmits the feedback information to a base station in a next subframe of the target subframe. The feedback information of the target subframe is transmitted in the next subframe of the target subframe, so that the feedback information of each TTI in the subframe can be fed back to the base station in time. That is, when the downlink transmission uses a short TTI length or the TTI length is not fixed, the normal feedback of the feedback information of the downlink transmission is supported.

Based on the network structure shown in fig. 1, another feedback information transmission method provided in the embodiments of the present invention, as shown in fig. 3, includes the following steps:

301. the method comprises the steps that a base station receives feedback information transmitted by UE in a next subframe of a target subframe, wherein the feedback information is generated by the UE and is of the target subframe.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the feedback information of the target subframe includes:

Optionally, the codebook size includes:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the feedback information of the target subframe includes:

It should be noted that, this embodiment is taken as an implementation of the base station side corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 2, so as to avoid repeated description, and this embodiment is not described again. In this embodiment, it can also be realized that the transmission of the feedback information is suitable for a short TTI or a TTI with a variable length.

The embodiments described in the above examples are illustrated below by way of a number of examples:

example 1:

as shown in fig. 4, a Frequency Division Duplex (FDD) carrier transmits downlink TTIs with a TTI length of 2 OFDM symbols in a subframe n-1, and feedback information corresponding to the downlink TTIs is fed back in the subframe n.

The UE may generate feedback bits according to the TTI number, and assuming that the UE correctly receives all TTIs under the transmission condition of the single carrier single codeword, the feedback codebook has 7 bits 1. The subframe n contains a plurality of transmission resources of the feedback information, the base station can pre-configure a plurality of resources for the terminal through RRC signaling, and inform the transmission resources corresponding to the current transmission through downlink scheduling signaling when scheduling downlink transmission. In this example, the transmission resource of the feedback information occupies 2 OFDM symbols in length.

Example 2: as shown in fig. 5, each subframe may be a special subframe, a Time Division Duplex (TDD) carrier, or a 5G new carrier.

Suppose that a base station configures a carrier 1 and a carrier 2 for a UE, a downlink TTI in a subframe on the carrier 1 occupies 10 OFDM symbols, a GP occupies 1 OFDM symbol, an uplink TTI occupies 3 OFDM symbols, a downlink TTI in a subframe on the carrier 2 occupies 9 OFDM symbols, a GP occupies 3 OFDM symbols, and an uplink TTI occupies 2 OFDM symbols. The base station schedules downlink transmission on a carrier 1 and a carrier 2 simultaneously in a subframe n-1, transmits downlink TTI with the length of 1 OFDM symbol, and feeds back feedback information corresponding to the downlink TTI in the subframe n.

The first method is as follows: the UE can respectively generate feedback bits according to the maximum downlink TTI number on each carrier, under the transmission condition of a single code word, the base station schedules downlink transmission in downlink TTIs 0-5 in a carrier 1 subframe n-1 and schedules downlink transmission in downlink TTIs 0-7 in a carrier 2 subframe n-1, if the UE correctly receives all TTIs, the feedback bits on the carrier 1 are 1111110000, the feedback bits on the carrier 2 are 111111110, and the terminal sends cascaded feedback information in the sUCCH of the carrier 1 subframe n.

The second method comprises the following steps: the UE may generate a feedback bit according to the DAI indicated by the base station, and assuming that under the condition of dual codeword transmission, the base station schedules downlink transmission in downlink TTI 3 in subframe n-1 of carrier 1, where the corresponding frequency and time domain counts C-DAI are 1 and T-DAI is 1, and schedules downlink transmission in downlink TTIs 5-7 in subframe n-1 of carrier 2, where the corresponding frequency and time domain counts C-DAI are 2, 3, and 4, respectively, and the corresponding T-DAI is also 2, 3, and 4, respectively, and if the UE does not receive TTI 3 on carrier 1 but correctly receives all TTIs of carrier 2, the UE may generate a feedback bit 00111111 according to the DAI and send feedback information in sPUCCH in subframe n of carrier 1.

Example 3: as shown in fig. 6, each subframe may be a special subframe, either a TDD carrier or a 5G new carrier.

Suppose that a base station configures a carrier 1 and a carrier 2 for a UE, a downlink TTI in a subframe on the carrier 1 occupies 10 OFDM symbols, a GP occupies 1 OFDM symbol, an uplink TTI occupies 3 OFDM symbols, a downlink TTI in a subframe on the carrier 2 occupies 10 OFDM symbols, a GP occupies 2 OFDM symbols, and an uplink TTI occupies 2 OFDM symbols. The base station schedules downlink transmission on the carrier 1 and the carrier 2 simultaneously in the subframe n-1, the transmission TTI length is the downlink TTI with variable length, and the feedback information corresponding to the downlink TTI is fed back in the subframe n.

The UE may determine the feedback bit number according to the length of the downlink basic TTI (2 OFDM symbols), and under the condition of single codeword transmission, the base station schedules 4 downlink TTIs in a carrier 1 subframe n-1, and occupies 3, 2, and 3 OFDM symbols, respectively, and schedules 3 downlink TTIs in a carrier 2 subframe n-1, and occupies 3, and 4 OFDM symbols, respectively, if the UE correctly receives all TTIs, the UE may determine the feedback bit position according to the basic TTI to which the first OFDM symbol of the received TTI belongs, where the feedback bit of the terminal on the carrier 1 is 11110, the feedback bit 10110 on the carrier 2, and the terminal sends feedback information on each carrier in the sPUCCH of the carrier 1 subframe n and the sPUCCH of the carrier 2, respectively.

Referring to fig. 7, which illustrates a UE architecture, the UE70 includes the following modules:

a generating module 71, configured to generate feedback information of the target subframe.

A transmission module 72, configured to transmit the feedback information to the base station in a subframe next to the target subframe.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the generating module 71 may be configured to determine a codebook size of the feedback information of the target subframe, and generate the feedback information of the target subframe according to the codebook size.

Optionally, the generating module 71 may be configured to determine a codebook size of the feedback information of the target subframe according to specific information, where the specific information includes one or more of the following:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the generating module 71 may be configured to concatenate feedback bits of a target subframe in at least one carrier to obtain a codebook of the codebook size, so as to generate feedback information of the target subframe, where the feedback bits of the target subframe in each carrier are sorted according to a TTI number; or

The generating module 71 may be configured to sort the feedback bits of the target subframe according to DAI information to obtain a codebook of the codebook size, so as to generate the feedback information of the target subframe; or

The generating module 71 may be configured to concatenate feedback bits of a target subframe in at least one carrier to obtain a codebook of the codebook size, so as to generate feedback information of the target subframe, where the feedback bits of each carrier are sorted according to DAI information.

Optionally, the transmission module 72 may be configured to transmit the feedback information to the base station in the last x OFDM symbols in the next subframe of the target subframe, where x is an integer greater than or equal to 1; or

The transmission module 72 may be configured to transmit the feedback information to the base station in a specific resource in a next subframe of the target subframe, where the specific resource is determined by the TTI length and the location of the downlink transmission in the target subframe, or the specific resource is indicated by higher layer signaling and/or signaling of a scheduled downlink TTI.

Optionally, the transmission module 72 may be configured to transmit the feedback information to the base station in an s PUCCH format in a next subframe of the target subframe; or

The transmission module 72 may be configured to transmit the feedback information to the base station in s PUSCH format in a next subframe of the target subframe.

It should be noted that, in this embodiment, the UE70 may be the UE in the embodiment shown in fig. 1 to 6, and any implementation of the UE in the embodiment shown in fig. 1 to 6 may be implemented by the UE70 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 8, which shows a base station structure, a base station 80 includes the following modules:

a receiving module 81, configured to receive feedback information transmitted by a UE in a next subframe of a target subframe, where the feedback information is feedback information of the target subframe generated by the UE.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the feedback information of the target subframe includes:

Optionally, the codebook size includes:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the feedback information of the target subframe includes:

Optionally, the receiving module 81 may be configured to receive, by the base station, the feedback information transmitted by the UE in the last x OFDM symbols in the next subframe of the target subframe, where x is an integer greater than or equal to 1; or

The receiving module 81 may be configured to receive the feedback information transmitted by the UE in a specific resource in a next subframe of the target subframe, where the specific resource is determined by the TTI length and the location of the downlink transmission in the target subframe, or the specific resource is indicated by higher layer signaling and/or signaling of a scheduled downlink TTI.

Optionally, the receiving module 81 may be configured to receive the feedback information transmitted by the UE in an s PUCCH format in a next subframe of the target subframe; or

The receiving module 81 may be configured to receive the feedback information transmitted by the UE in s PUSCH format in a next subframe of the target subframe.

It should be noted that, in this embodiment, the base station 80 may be the base station in the embodiment shown in fig. 1 to fig. 6, and any implementation of the base station in the embodiment shown in fig. 1 to fig. 6 may be implemented by the base station 80 in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 9, there is shown a structure of a UE, the base station comprising: a processor 900, a transceiver 910, a memory 920, a user interface 930, and a bus interface, wherein:

a processor 900 for reading the program in the memory 920, executing the following processes:

generating feedback information of the target subframe;

transmitting, by the transceiver 910, the feedback information to the base station in a next subframe of the target subframe.

Among other things, the transceiver 910 is configured to receive and transmit data under the control of the processor 900.

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors, represented by processor 900, and memory, represented by memory 920. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 930 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the generating feedback information of the target subframe includes:

and determining the codebook size of the feedback information of the target subframe, and generating the feedback information of the target subframe according to the codebook size.

Optionally, the determining the codebook size of the feedback information of the target subframe includes:

determining the codebook size of the feedback information of the target subframe according to specific information, wherein the specific information comprises one or more of the following:

and index values C-DAI and T-DAI and C-DAI of a frequency domain and a time domain are configured in the counting downlink of the time domain.

Optionally, the generating feedback information of the target subframe according to the size of the codebook includes:

cascading feedback bits of a target subframe in at least one carrier to obtain a codebook with the size of the codebook so as to generate feedback information of the target subframe, wherein the feedback bits of the target subframe in each carrier are sequenced according to TTI (transmission time interval) numbers; or

Sequencing the feedback bits of the target subframe according to DAI information to obtain a codebook with the size of the codebook so as to generate the feedback information of the target subframe; or

And cascading feedback bits of a target subframe in at least one carrier to obtain a codebook with the size of the codebook so as to generate feedback information of the target subframe, wherein the feedback bits of each carrier are sequenced according to DAI information.

Optionally, the transmitting the feedback information to the base station in a subframe next to the target subframe includes:

transmitting the feedback information to a base station in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1; or

And transmitting the feedback information to a base station in a specific resource in a next subframe of the target subframe, wherein the specific resource is determined by the TTI length and the position of downlink transmission in the target subframe, or the specific resource is indicated by high-layer signaling and/or signaling of scheduling downlink TTI.

transmitting the feedback information to a base station by adopting an sPUCCH format in a next subframe of the target subframe; or

And transmitting the feedback information to a base station by adopting an sUSCH format in a next subframe of the target subframe.

It should be noted that, the UE in this embodiment may be the UE in the embodiment shown in fig. 1 to 6, and any implementation of the UE in the embodiment shown in fig. 1 to 6 may be implemented by the UE in this embodiment to achieve the same beneficial effects, which is not described herein again.

Referring to fig. 10, there is shown a structure of a base station including: a processor 1000, a transceiver 1010, a memory 1020, a user interface 1030, and a bus interface, wherein:

the processor 1000, which is used to read the program in the memory 1020, executes the following processes:

receiving, by a transceiver 1010, feedback information transmitted by a UE in a next subframe of a target subframe, where the feedback information is feedback information of the target subframe generated by the UE.

Among other things, a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1030 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

Optionally, the feedback information includes:

ACK feedback information of HARQ or NACK feedback information of HARQ.

Optionally, the feedback information of the target subframe includes:

Optionally, the codebook size includes:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

Optionally, the feedback information of the target subframe includes:

Optionally, the receiving feedback information transmitted by the UE in a next subframe of the target subframe includes:

receiving the feedback information transmitted by the UE in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1; or

And receiving the feedback information transmitted by the UE in a specific resource in a next subframe of the target subframe, wherein the specific resource is determined by the TTI length and the position of downlink transmission in the target subframe, or the specific resource is indicated by high-layer signaling and/or signaling of scheduling downlink TTI.

receiving the feedback information transmitted by the UE in the next subframe of the target subframe by adopting an s PUCCH format; or

And receiving the feedback information transmitted by the UE in the s PUSCH format in the next subframe of the target subframe.

It should be noted that, the base station in this embodiment may be the base station in the embodiment shown in fig. 1 to 6, and any implementation of the base station in the embodiment shown in fig. 1 to 6 may be implemented by the base station in this embodiment to achieve the same beneficial effects, and details are not repeated here.

Referring to fig. 11, there is shown a feedback information transmission system including:

the UE111 is configured to generate feedback information of a target subframe;

the UE111 transmits the feedback information to the base station 112 in a next subframe of the target subframe;

the base station 112 is configured to receive the feedback information transmitted by the UE111 in a subframe next to a target subframe.

In this embodiment, the UE111 and the base station 112 may be the UE and the base station introduced in the embodiments shown in fig. 1 to 10, and their embodiments may refer to the embodiments shown in fig. 1 to 10, which can also achieve the same technical effect and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting feedback information, comprising:

user Equipment (UE) generates feedback information of a target subframe;

the UE generates feedback information of a target subframe, and the feedback information comprises:

the UE determines the size of a codebook of the feedback information of the target subframe, and generates the feedback information of the target subframe according to the size of the codebook;

the UE determines the codebook size of the feedback information of the target subframe, and the method comprises the following steps:

the UE determines the codebook size of the feedback information of the target subframe according to specific information, wherein the specific information comprises: the maximum number of downlink Transmission Time Intervals (TTI) which can be transmitted by the target subframe;

if the target subframe is a downlink subframe, the maximum number of transmissible TTIs of the target subframe is the maximum number of transmissible TTIs of the target subframe; or

2. The method of claim 1, wherein the feedback information comprises:

positive acknowledgement, ACK, feedback information of hybrid automatic repeat request, HARQ, or negative acknowledgement, NACK, feedback information of HARQ.

3. The method of claim 1, wherein the specific information includes one or more of:

the number of configured carriers, the DAI information of the downlink configuration index value indicated by the base station, the high-level signaling and the number of transmission blocks.

4. The method of claim 3, wherein the base station indicated DAI information includes one or more of:

a counting downlink configuration index value C-DAI of a time domain, a total downlink configuration index value T-DAI and a C-DAI of a frequency domain and a time domain.

5. The method of claim 4, wherein the C-DAI of the frequency domain and the time domain is a TTI index of downlink data scheduled by the base station, and the C-DAI of the frequency domain and the time domain counts scheduled TTIs in order of frequency domain first and time domain second;

6. The method of claim 3, wherein the number of higher layer signaling and/or transport blocks is used to determine the number of feedback bits per TTI in the target subframe, wherein:

7. The method of any of claims 1-6, wherein the UE generating feedback information for the target-subframe based on the codebook size comprises:

8. The method of claim 7, wherein the TTI numbers are numbers in TTI actual transmission order; or

9. The method of claim 8, wherein when the TTI numbers are numbers in a basic TTI order, the number of the TTI received by the UE is the number of a basic TTI to which a first OFDM symbol of the TTI belongs.

10. The method of any one of claims 1-6, wherein the UE transmitting the feedback information to a base station in a next subframe of the target subframe comprises:

11. The method of any one of claims 1-6, wherein the UE transmitting the feedback information to a base station in a next subframe of the target subframe comprises:

the UE transmits the feedback information to a base station in a next subframe of the target subframe by adopting a short physical uplink control channel (s PUCCH) format; or

And the UE transmits the feedback information to a base station in the next subframe of the target subframe by adopting a short physical uplink shared channel (s PUSCH) format.

12. The method of any one of claims 1-6, wherein the target-subframe is a time period comprising z OFDM symbols in a time domain, a next subframe of the target-subframe is a next said time period of the target-subframe in the time domain, and z is a positive integer greater than or equal to 1.

13. A method for transmitting feedback information, comprising:

a base station receives feedback information transmitted by UE in a next subframe of a target subframe, wherein the feedback information is generated by the UE and is of the target subframe;

wherein the feedback information of the target subframe comprises:

the UE generates the feedback information of the target subframe according to the determined codebook size of the feedback information of the target subframe, wherein the codebook size comprises:

the UE determines the codebook size of the feedback information of the target subframe according to specific information, wherein the specific information comprises: the maximum number of downlink TTIs (transmission time intervals) which can be transmitted by the target subframe;

14. The method of claim 13, wherein the feedback information comprises:

ACK feedback information of HARQ or NACK feedback information of HARQ.

15. The method of claim 13, wherein the specific information includes one or more of:

and configuring the number of carriers, DAI information indicated by the base station, high-level signaling and the number of transmission blocks.

16. The method of claim 15, wherein the base station indicated DAI information includes one or more of:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

17. The method of claim 16, wherein the C-DAI of the frequency domain and the time domain is a TTI index of downlink data scheduled by the base station, and the C-DAI of the frequency domain and the time domain counts scheduled TTIs in order of frequency domain first and time domain second;

18. The method of claim 15, wherein the number of higher layer signaling and/or transport blocks is used to determine the number of feedback bits per TTI in the target subframe, wherein:

19. The method of any one of claims 15-18, wherein the feedback information for the target subframe comprises:

20. The method of claim 19, wherein the TTI numbers are numbers in TTI actual transmission order; or

21. The method of claim 20, wherein when the TTI numbers are numbers in a basic TTI order, the number of the TTI received by the UE is the number of the basic TTI to which the first OFDM symbol of the TTI belongs.

22. The method of any of claims 13-18, wherein the base station receiving feedback information transmitted by the UE in a next subframe of the target subframe comprises:

23. The method of any of claims 13-18, wherein the base station receiving feedback information transmitted by the UE in a next subframe of the target subframe comprises:

24. The method of any one of claims 13-18, wherein the target-subframe is a time period comprising z OFDM symbols in the time domain, a next subframe of the target-subframe is a next said time period of the target-subframe in the time domain, and z is a positive integer greater than or equal to 1.

25. A UE, comprising:

a transmission module, configured to transmit the feedback information to a base station in a subframe next to the target subframe;

the generating module is used for determining the codebook size of the feedback information of the target subframe and generating the feedback information of the target subframe according to the codebook size;

the generating module is configured to determine a codebook size of feedback information of the target subframe according to specific information, where the specific information includes: the maximum number of downlink TTIs (transmission time intervals) which can be transmitted by the target subframe;

26. The UE of claim 25, wherein the feedback information comprises:

ACK feedback information of HARQ or NACK feedback information of HARQ.

27. The UE of claim 25, wherein the specific information includes one or more of:

28. The UE of claim 27, wherein the base station indicated DAI information includes one or more of:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

29. The UE of claim 28, wherein the frequency and time domain C-DAI is a TTI index where the base station schedules downlink data, and the frequency and time domain C-DAI counts scheduled TTIs in order of frequency domain before time domain;

30. The UE of claim 27, wherein the number of higher layer signaling and/or transport blocks is used to determine the number of feedback bits per TTI in the target subframe, wherein:

31. The UE of any one of claims 25-30, wherein the generating module is configured to concatenate feedback bits of a target subframe in at least one carrier to obtain a codebook of the codebook size to generate the feedback information of the target subframe, wherein the feedback bits of the target subframe in each carrier are ordered according to TTI numbers; or

32. The UE of claim 31, wherein the TTI numbers are numbers in TTI actual transmission order; or

33. The UE of claim 32, wherein when the TTI numbers are numbers in a basic TTI order, the number of the TTI received by the UE is a number of a basic TTI to which a first OFDM symbol of the TTI belongs.

34. The UE of any one of claims 25-30, wherein said transmitting module is to transmit the feedback information to a base station in a last x OFDM symbols in a next subframe of the target subframe, x being an integer greater than or equal to 1; or

35. The UE of any of claims 25-30, wherein the transmission module is to transmit the feedback information to a base station in an s PUCCH format in a next subframe of the target subframe; or

And the transmission module is used for transmitting the feedback information to the base station by adopting an s PUSCH format in the next subframe of the target subframe.

36. The UE of any one of claims 25-30, wherein the target-subframe is a time period in time domain that includes z OFDM symbols, a next subframe of the target-subframe is a next said time period of the target-subframe in time domain, and z is a positive integer greater than or equal to 1.

37. A base station, comprising:

a receiving module, configured to receive feedback information transmitted by a UE in a next subframe of a target subframe, where the feedback information is feedback information of the target subframe generated by the UE;

wherein the feedback information of the target subframe comprises:

38. The base station of claim 37, wherein the feedback information comprises:

ACK feedback information of HARQ or NACK feedback information of HARQ.

39. The base station of claim 37, wherein the specific information includes one or more of:

40. The base station of claim 39, wherein the base station indicated DAI information comprises one or more of:

C-DAI in the time domain, T-DAI, and C-DAI in the frequency and time domains.

41. The base station of claim 40, wherein the C-DAIs in the frequency domain and the time domain are TTI indices for scheduling downlink data by the base station, and the C-DAIs in the frequency domain and the time domain are counted for scheduled TTIs in order of frequency domain before time domain;

42. The base station of claim 39, wherein the number of higher layer signaling and/or transport blocks is used to determine the number of feedback bits per TTI in the target subframe, wherein:

43. The base station of any of claims 37-42, wherein the feedback information for the target subframe comprises:

44. The base station of claim 43, wherein the TTI number is a number in TTI actual transmission order; or

45. The base station of claim 44, wherein when the TTI number is a number in a basic TTI order, the number of the TTI received by the UE is a number of a basic TTI to which a first OFDM symbol of the TTI belongs.

46. The base station of any of claims 37-42, wherein the receiving module is configured to receive the feedback information transmitted by the UE in the last x OFDM symbols in the next subframe of the target subframe, wherein x is an integer greater than or equal to 1; or

47. The base station of any of claims 37-42, wherein the receiving module is configured to receive the feedback information transmitted by the UE in an s PUCCH format in a next subframe of the target subframe; or

48. The base station of any of claims 37-42, wherein the target-subframe is a time period in time domain comprising z OFDM symbols, wherein a next subframe of the target-subframe is a next said time period of the target-subframe in time domain, and wherein z is a positive integer greater than or equal to 1.

49. A feedback information transmission system, comprising:

the UE is used for generating feedback information of the target subframe;

the base station is used for receiving the feedback information transmitted by the UE in a next subframe of a target subframe;