CN107135052B

CN107135052B - Method for sending HARQ-ACK feedback information

Info

Publication number: CN107135052B
Application number: CN201710353029.1A
Authority: CN
Inventors: 付景兴; 李迎阳
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2011-05-31
Filing date: 2012-05-11
Publication date: 2021-02-02
Anticipated expiration: 2032-05-11
Also published as: CN107135052A; CN102904698B; CN102904698A

Abstract

The invention provides a method for sending HARQ-ACK feedback information, which is used for the condition that TDD uplink and downlink configurations of a plurality of Component Carriers (CC) in Carrier Aggregation (CA) are different, and the method comprises the following steps: the method comprises the steps that UE receives an uplink grant (UL grant) sent by a base station, and acquires a downlink allocation index (UL DAI) from the UL grant; the UE sends HARQ-ACK feedback information on a Physical Uplink Shared Channel (PUSCH), and the bit number of the HARQ-ACK feedback information is determined according to the UL DAI value in the UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size (Bundling window size) of a Bundling window. The invention can carry out correct HARQ-ACK feedback information transmission in the CA systems with different TDD uplink and downlink configurations of a plurality of CCs, thereby effectively supporting the condition that the TDD uplink and downlink configurations of the plurality of CCs aggregated by carriers are different.

Description

Method for sending HARQ-ACK feedback information

The application is a divisional application of an invention patent application with the application number of '201210146454.0' and the invention name of 'a method for sending HARQ-ACK feedback information'.

Technical Field

The invention relates to a wireless communication system technology, in particular to a method for sending HARQ-ACK feedback information.

Background

The Long Term Evolution (LTE) system supports two duplexing modes, Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD). Fig. 1 is a frame structure of a TDD system. Each radio frame is 10ms in length and is equally divided into two half-frames of 5ms in length. Each half frame comprises 8 time slots with the length of 0.5ms and 3 special domains, namely a downlink pilot time slot (DwPTS), a guard interval (GP) and an uplink pilot time slot (UpPTS), wherein the sum of the lengths of the 3 special domains is 1 ms. Each subframe consists of two consecutive slots, i.e., the k-th subframe includes slot 2k and slot 2k + 1. The TDD system supports 7 different TDD uplink and downlink configurations, as shown in table 1. In table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents the above-mentioned special subframe including 3 special fields.

Table 1: uplink and downlink configuration of LTE TDD

In order to increase the transmission rate of users, an enhanced LTE-a (LTE-a) system of the LTE system is proposed. In LTE-a, a larger operating bandwidth, i.e., Carrier Aggregation (CA), is obtained by aggregating a plurality of Component Carriers (CCs), and downlink and uplink of a communication system are configured, thereby supporting a higher transmission rate. For example, to support a bandwidth of 100MHz, it can be obtained by aggregating 5 CCs of 20 MHz. Here, each CC is referred to as a Cell (Cell). For one UE, a base station may be configured to operate in multiple CCs, one of which is a primary CC (PCC or Pcell), and the other CCs are referred to as secondary CCs (SCC or Scell).

In LTE-a TDD systems are specified: multiple CCs aggregated together adopt the same uplink and downlink configuration, as shown in fig. 2:

the CA shown in fig. 2 includes 2 CCs, which are: main CC and auxiliary CC.

Each CC employs the same uplink and downlink configuration. In this example,

subframes

0, 1, 3 to 6,8 and 9 in each radio frame are configured as downlink subframes, and subframe 2 and subframe 7 are configured as uplink subframes.

For data received from downlink subframes, the UE needs to send ACK or NACK to the base station through the uplink subframes for positive acknowledgement or negative acknowledgement, for which purpose, several downlink subframes are divided into one HARQ-ACK bundling window, and HARQ-ACK feedback information of each downlink subframe belonging to the same HARQ-ACK bundling window is sent in the same uplink subframe. This is explained below with reference to fig. 2.

In fig. 2,

subframes

4,5,6, and 8 of radio frame N shown by oblique lines belong to a HARQ-ACK bundling window, HARQ-ACK feedback information of each subframe in the HARQ-ACK bundling window is transmitted on subframe 2 of radio frame N +1, and the content "N" in the frame corresponding to each subframe indicates: and the HARQ-ACK feedback information of the subframe is sent on the Nth subframe from the subframe. For example: the content in the frame corresponding to the subframe 4 is 8, the 8 th subframe from the subframe 4 is a subframe 2 in a radio frame n +1, and therefore, HARQ-ACK feedback information of the subframe 4 is sent on the subframe 2; another example is: the content of the frame corresponding to the subframe 8 is 4, and the 4 th subframe from the subframe 8 is the subframe 2 in the radio frame n +1, so that the HARQ-ACK feedback information of the subframe 8 of the radio frame n is sent on the subframe 2 of the radio frame n + 1.

One way for the UE to feed back the HARQ-ACK is PUCCH format 3(PUCCH format 3), and another way for the UE to feed back the HARQ-ACK is PUCCH format 1b with channel selection (PUCCH format 1 b). Wherein:

PUCCH format 3 can support 5 CCs at most, and PUCCH format 1b with channel selection supports 2 CCs at most.

The base station sends a UL grant (uplink grant) on a Physical Downlink Control Channel (PDCCH) to schedule Physical Uplink Shared Channel (PUSCH) resources for the UE. The UL grant is transmitted on the last subframe of the HARQ-ACK bundling window.

After receiving the UL grant, the UE obtains a downlink assignment index (UL DAI) value, and determines how to send HARQ-ACK feedback information to the base station according to the UL DAI value. There are two possible uses for the UL DAI value:

the first purpose is as follows: the value of the UL DAI is used to determine the number of bits for transmitting HARQ-ACK feedback information using the method of PUCCH format 3. In the following, it is assumed that the UE configures 2 CCs and the UL DAI value is M, and the description will be given by taking fig. 2 as an example. In this case, for a CC whose operating mode is SIMO (single input multiple output), the number of bits required for HARQ-ACK feedback information of this CC is M; for a CC with a MIMO (multiple input multiple output) operating mode, if the sum of the number of bits of HARQ-ACK feedback information of all CCs that the UE needs to transmit is less than or equal to N (e.g. 20), the number of bits required for HARQ-ACK feedback information of the CC is M × 2; for a CC with a MIMO (multiple input multiple output) working mode, if the sum of the bits of HARQ-ACK feedback information of all CCs that the UE needs to transmit is greater than N (for example, 20), the number of bits required for HARQ-ACK feedback information of the CC is M;

the second purpose is as follows: the value of UL DAI is used to determine the number of bits for transmitting HARQ-ACK feedback information for the PUCCH format 1b with channel selection:

in the Release 10 of LTE Release, when the HARQ-ACK transmission mode of PUCCH format 1b with channel selection is adopted, 2-bit HARQ-ACK information can be transmitted at most for each CC;

when the value of UL DAI is equal to 1 and is the SIMO transmission mode, 1-bit HARQ-ACK information HARQ-ACK (0) is obtained from a unique transport block of the scheduled unique subframe;

when the value of UL DAI is equal to 1 and is in a MIMO transmission mode, 2-bit HARQ-ACK information HARQ-ACK (0) is obtained, and HARQ-ACK (1) is respectively obtained by a transmission block 0 and a transmission block 1 of the scheduled unique subframe;

when the value of UL DAI is equal to 2 and is the SIMO transmission mode, 1 bit HARQ-ACK information HARQ-ACK (0) is obtained from the unique transport block of subframe 0, and another 1 bit HARQ-ACK information HARQ-ACK (1) is obtained from the unique transport block of subframe 1; here, the subframe 0 and the subframe 1 are not actual numbers of subframes, but are used to distinguish 2 subframes that are scheduled, the same applies below;

when the value of the UL DAI is equal to 2 and is in a MIMO transmission mode, 1-bit HARQ-ACK information HARQ-ACK (0) is obtained by spatially bundling a transmission block 0 of a subframe 0 and a transmission block 1 of the subframe 0, and the other 1-bit HARQ-ACK information HARQ-ACK (1) is obtained by spatially bundling the transmission block 0 of the subframe 1 and the transmission block 1 of the subframe 1;

when the value of UL DAI is equal to 3 and in the SIMO transmission mode, 2-bit HARQ-ACK information HARQ-ACK (0) is obtained, HARQ-ACK (1) is obtained by time-domain bundling of HARQ-ACK information of a subframe with DAI equal to 1, a subframe with DAI equal to 2, and a subframe with DAI equal to 3, and a specific bundling manner is shown in table 2, where HARQ-ACK ' (0), HARQ-ACK ' (1), and HARQ-ACK ' (2) are HARQ-ACK information of a subframe with DAI equal to 1, a subframe with DAI equal to 2, and a subframe with DAI equal to 3, respectively, and a mapped state is HARQ-ACK information of the mapped CC;

when the UL DAI value is equal to 3 and the MIMO transmission mode is selected, HARQ-ACK '(0) is spatially bundled from the transport block 1 of the subframe where DAI is 1 and the transport block 0 of the subframe where DAI is 1, HARQ-ACK' (1) is spatially bundled from the transport block 1 of the subframe where DAI is 2 and the transport block 0 of the subframe where DAI is 2, HARQ-ACK '(2) is spatially bundled from the transport block 1 of the subframe where DAI is 3 and the transport block 0 of the subframe where DAI is 3, HARQ-ACK information HARQ-ACK' (0) is spatially bundled from the subframe where DAI is 1, the subframe where DAI is 2 and the subframe where DAI is 3, HARQ-ACK '(1), HARQ-ACK' (2) is spatially bundled to obtain 2-bit HARQ-ACK information HARQ-ACK (0), HARQ-ACK (1), and a specific bundling scheme is shown in table 2, wherein, HARQ-ACK ' (0), HARQ-ACK ' (1), HARQ-ACK ' (2) are HARQ-ACK information after spatial bundling of a subframe whose DAI is 1, a subframe whose DAI is 2, and a subframe whose DAI is 3, respectively, and the mapped state is HARQ-ACK information of the mapped CC;

when the UL DAI value is equal to 4 and the transmission mode is SIMO, 2-bit HARQ-ACK information HARQ-ACK (0), HARQ-ACK (1) is obtained by time-domain bundling HARQ-ACK information of a subframe whose DAI is 1, a subframe whose DAI is 2, a subframe whose DAI is 3, and a subframe whose DAI is 4, and a specific bundling manner is shown in table 3, where HARQ-ACK '(0), HARQ-ACK' (1), HARQ-ACK '(2), and HARQ-ACK' (3) are HARQ-ACK information of a subframe whose DAI is 1, a subframe whose DAI is 2, a subframe whose DAI is 3, and a subframe whose DAI is 4, respectively, and a mapped state is HARQ-ACK information of the mapped CC;

when the value of UL DAI is equal to 4 and the MIMO transmission mode is selected, HARQ-ACK ' (0) is spatially bundled from a transport block 1 of a subframe where DAI is 1 and a transport block 0 of a subframe where DAI is 1, HARQ-ACK ' (1) is spatially bundled from a transport block 1 of a subframe where DAI is 2 and a transport block 0 of a subframe where DAI is 2, HARQ-ACK ' (2) is spatially bundled from a transport block 0 of a subframe where DAI is 3 and a transport block 1 of a subframe where DAI is 3, HARQ-ACK ' (3) is spatially bundled from a transport block 0 of a subframe where DAI is 4 and a transport block 1 of a subframe where DAI is 4, HARQ-ACK ' (0) is spatially bundled from a subframe where DAI is 2, a subframe where DAI is 3 and HARQ-ACK ' (2), and then DAI-HARQ information-ACK ' (0) is spatially bundled from a subframe where DAI is 1, a subframe where DAI is 2, a subframe where DAI is 3, and a subframe where DAI-ACK is 4), HARQ-ACK ' (3) is subjected to time domain bundling to obtain 2-bit HARQ-ACK information HARQ-ACK (0), HARQ-ACK (1), and a specific bundling manner is shown in table 3, where HARQ-ACK ' (0), HARQ-ACK ' (1), and HARQ-ACK ' (2), HARQ-ACK ' (3) is HARQ-ACK information obtained by spatially bundling subframes whose DAI is 1, subframes whose DAI is 2, subframes whose DAI is 3, and subframes whose DAI is 4, respectively, and a state after mapping is HARQ-ACK information of the mapped CC.

Table 2: time domain binding mapping relation when M is 3

Table 3: time domain binding mapping relation when M is 4

Note that: in tables 2 and 3, a indicates HARQ-ACK information "ACK", N indicates HARQ-ACK information "NACK", and D indicates HARQ-ACK information "DTX".

In fact, when the frequency domain distance between multiple CCs performing carrier aggregation is large enough, the CCs may adopt different uplink and downlink configurations without mutual interference; in addition, in some cases, different uplink and downlink configurations may have been deployed for the phase frequency of each CC (for example, the adjacent frequency is a different TD-SCDMA configuration), and at this time, if the same uplink and downlink configuration is continuously adopted for the CCs, relatively serious adjacent frequency interference may be generated, so in the subsequent research of LTE-a, an important subject is to research how to effectively support the situation that the uplink and downlink configurations of multiple CCs for carrier aggregation are different. For example: when uplink and downlink configurations of a plurality of CCs in carrier aggregation are different, how the UE determines the bit number for transmitting HARQ-ACK feedback information in the PUSCH is a technical problem to be solved urgently.

Disclosure of Invention

The invention provides a method for sending HARQ-ACK feedback information, which is used for the condition that TDD uplink and downlink configurations of a plurality of Component Carriers (CC) in Carrier Aggregation (CA) are different, and is characterized by comprising the following steps:

a User Equipment (UE) receives an uplink grant (UL grant) sent by a base station, and acquires a downlink assignment index (UL DAI) from the UL grant;

the UE sends HARQ-ACK feedback information on a Physical Uplink Shared Channel (PUSCH), and the bit number of the HARQ-ACK feedback information is determined according to the UL DAI value in the UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size (Bundling window size) of a Bundling window.

According to the technical scheme, when TDD uplink and downlink configurations of a plurality of Component Carriers (CCs) in Carrier Aggregation (CA) are different, the method for sending the HARQ-ACK feedback information determines the bit number of the HARQ-ACK feedback information according to the UL DAI value in the UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size of the bundling window of each CC, avoids the waste of PUSCH resources, can carry out correct HARQ-ACK feedback information transmission in CA systems with different uplink and downlink configurations of the plurality of CCs, further effectively supports the condition that the uplink and downlink configurations of the plurality of CCs in carrier aggregation are different, and meets the requirements of different application scenes on the uplink and downlink configurations of the CCs.

Drawings

Fig. 1 is a diagram illustrating a frame structure of a conventional TDD system;

fig. 2 is a schematic diagram of TDD uplink and downlink configuration of each CC in the same CA in the prior art;

fig. 3 is a flowchart illustrating a method for transmitting HARQ-ACK feedback information according to the present invention;

fig. 4 is a schematic diagram illustrating the location of the ULDAI when each CC adopts different uplink and downlink configurations in a preferred embodiment of the present invention;

fig. 5 is a schematic diagram illustrating values of ULDAI when each CC adopts different uplink and downlink configurations in a preferred embodiment of the present invention;

fig. 6 is a diagram illustrating HARQ-ACK bundling windows of each CC when each CC adopts different uplink and downlink configurations according to a preferred embodiment of the present invention;

fig. 7 is a diagram illustrating HARQ-ACK bundling windows of each CC when each CC adopts different uplink and downlink configurations according to a preferred embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and examples.

For the TDD system configured with carrier aggregation, the present invention assumes that TDD uplink and downlink configurations of multiple CCs of the base station may be different.

Fig. 3 is a basic flow diagram of the present invention. As shown in fig. 3, the process may include the following steps:

step 301: the base station sends a UL grant to the UE, wherein the UL grant contains a UL DAI, and the base station determines the value of the UL DAI to have the following three modes:

mode 1: and the maximum value of the number of sub-frames already scheduled by each CC from the first sub-frame in the HARQ-ACK bundling window corresponding to each CC for sending the HARQ-ACK feedback information in the same PUSCH to the sub-frame for sending the UL grant. For example, assuming that the CA UE configures 2 CCs as a primary CC and a secondary CC, if the UL Grant is transmitted on the secondary CC, the UL DAI indicates a maximum value max { M _ p, M _ s } of the number of downlink subframes M _ s that the secondary CC has scheduled from the first subframe in the bundling window to the subframe transmitting the UL Grant and the number of downlink subframes M _ p that the primary CC has scheduled from the first subframe in the bundling window to the subframe transmitting the UL Grant, as shown in fig. 4.

Mode 2: assuming that downlink subframes after corresponding subframes for transmitting the UL Grant are all scheduled, then considering the number of subframes already determined to be scheduled when transmitting the UL Grant and the fact that downlink subframes after corresponding subframes for transmitting the UL Grant are all scheduled, the number of subframes which are possible to be scheduled in the HARQ-ACK bundling window corresponding to each CC can be determined, and then taking the maximum value of the number of subframes which are possible to be scheduled of each CC, so as to obtain the UL DAI value. Assuming that the CA UE configures 2 CCs as a primary CC and a secondary CC, if the UL Grant is sent on the secondary CC, the UL DAI indicates a maximum value max { M _ p, M _ s } of a number M _ s of downlink subframes that may be scheduled, determined by the secondary CC in a bundling window according to the above method, and a number M _ p of downlink subframes that may be scheduled, determined by the primary CC in the bundling window according to the above method.

For example, as shown in fig. 5, the base station configures 2 CCs for CA UE, respectively a primary CC and a secondary CC, the primary CC is TDD uplink downlink configuration 2, the secondary CC is TDD uplink downlink configuration 1, a bundling window of the primary CC includes subframes {4,5,6,8}, a bundling window size is 4, a bundling window of the secondary CC includes subframes {4,5,6}, a bundling window size is 3, a UL Grant for scheduling PUSCH is transmitted on subframe 6 of the secondary CC, when the UL Grant is transmitted, 2 subframes are scheduled in

subframes

4,5,6 of the primary CC, the following subframe 8 cannot determine whether to be scheduled, if it is assumed that downlink subframes after corresponding subframes for transmitting the UL Grant are scheduled, the number of subframes possibly scheduled by the primary CC is 2+1 ═ 3, and 1 subframe is scheduled in

subframes

4,5,6 of the secondary CC, UL DAI is the maximum value of the possible scheduled subframes of the primary CC and the secondary CC, namely Max {3,1} -, 3.

Mode 3: and indicating a reference value of a bundling window used for calculating the number of bits of the HARQ-ACK feedback information in the HARQ-ACK bundling window corresponding to each CC for sending the HARQ-ACK feedback information in the same PUSCH, wherein the specific UL DAI value is determined by the realization of the eNB. For example, one implementation of the base station is to determine the value of the UL DAI in manner 2, and another implementation is that the base station can make a prediction to determine the value of the UL DAI according to the number of actually predicted scheduled subframes.

Step 302: the UE receives the UL grant and acquires the UL DAI in the UL grant;

step 303: the UE sends HARQ-ACK feedback information on a Physical Uplink Shared Channel (PUSCH), and the bit number of the HARQ-ACK feedback information is determined according to the UL DAI value in the UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size (Bundling window size) of a Bundling window.

In a carrier aggregation scenario with different TDD uplink and downlink allocations, the size of the Bundling window (Bundling window size) is: the size of a bundling window to which HARQ-ACK feedback information is fed back in the PUCCH. The bundling window applied for feeding back HARQ-ACK feedback information in PUCCH may be different for different cells or carriers. The following describes in detail a method for determining the bit number of HARQ-ACK feedback information by the UE:

1) when the base station determines the UL DAI in the mode 1 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 3, one method for the UE to determine the number of bits of the HARQ-ACK feedback information is as follows:

a portion of the HARQ-ACK bundling window of each CC that is before the subframe of the UL grant of the PUSCH for transmitting the scheduled transmission HARQ-ACK feedback information and includes the subframe of the PUSCH for transmitting the scheduled transmission HARQ-ACK feedback information is referred to as a first portion of the HARQ-ACK bundling window, and includes the number of downlink subframes denoted as M _ b, and a portion of the HARQ-ACK bundling window of each CC that is after the subframe of the UL grant of the PUSCH for transmitting the scheduled transmission HARQ-ACK feedback information is referred to as a second portion of the HARQ-ACK bundling window, and includes the number of downlink subframes denoted as M _ a, as shown in fig. 6.

When the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information is equal to the sum of the minimum value min { UL DAI, M _ b } in the UL grant of the PUSCH for scheduling the transmission of the HARQ-ACK feedback information and the size M _ b of the first part of the HARQ-ACK bundling window of the CC, and the size M _ a of the second part of the HARQ-ACK bundling window of the CC, namely M _ i ═ min { UL DAI, M _ b } + M _ a; wherein, M _ i represents the bit number of the HARQ-ACK feedback information of the CC, the following same;

when the operation mode of the CC is MIMO, the number of bits of the HARQ-ACK feedback information is equal to 2 times the sum of the UL DAI value in the UL grant of the PUSCH scheduling transmission of the HARQ-ACK feedback information and the minimum value min { UL DAI, M _ b } of the size M _ b of the first part of the HARQ-ACK bundling window of the CC and the size M _ a of the second part of the HARQ-ACK bundling window of the CC, i.e., M _ i ═ 2 (min { UL DAI, M _ b } + M _ a).

The bit number M _ i, i of HARQ-ACK feedback information of all CCs configured by the CA UE is sequentially calculated by the above method, where i is equal to 1, 2, and … configured CC number L.

When the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is less than or equal to N (for example, N is 20), the bit numbers of the HARQ-ACK feedback information of all CCs configured by the CA UE are not changed;

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than N (for example, N is 20), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is unchanged; and performing spatial bundling on the HARQ-ACK feedback information of the CC with the working mode of MIMO, wherein the number of HARQ-ACK bits of the CC is half of the original number, namely min { UL DAI, M _ b } + M _ a.

This process is illustrated by example 1 below.

Example 1:

suppose that the base station configures 2 CCs for CA UE, which are a primary CC and a secondary CC, respectively, where the primary CC is TDD uplink downlink configuration 2 and MIMO transmission mode, and the secondary CC is TDD uplink downlink configuration 1 and SIMO transmission mode, as shown in fig. 4. The bundling window of the primary CC includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window of the secondary CC includes subframes {4,5,6}, the bundling window size is 3, the UL Grant of the scheduled PUSCH is transmitted on subframe 6 of the secondary CC, assuming that the UL DAI is 2.

When the secondary CC is in SIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the secondary CC is (min { M _ b, UL DAI } + M _ a) ═ min {3,2} +0 ═ 2;

the primary CC is a MIMO transmission mode, and the HARQ-ACK feedback information bit number M _ i of the primary CC is 2 × (min { M _ b, UL DAI } + M _ a) ═ 2 × (min {3,2} +1) ═ 6.

The UE is configured with 2 CCs in total, the sum of the bit numbers of the HARQ-ACK feedback information of the 2 CCs is 2+6 ═ 8<20, the bit number of the HARQ-ACK feedback information of all CCs configured by the CA UE is not changed, that is, the bit number of the HARQ-ACK feedback information of the main CC is 6; the number of bits of the HARQ-ACK feedback information of the secondary CC is 2.

2) When the base station determines the UL DAI in the mode 1 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 3, the UE determines the bit number of the HARQ-ACK feedback information by another method as follows:

When the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information is equal to the sum of the minimum value min { UL DAI, M _ b } in the UL grant of the PUSCH for scheduling the transmission of the HARQ-ACK feedback information and the size M _ b of the first part of the HARQ-ACK bundling window of the CC, and the size M _ a of the second part of the HARQ-ACK bundling window of the CC, namely M _ i ═ min { UL DAI, M _ b } + M _ a;

When the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs configured by the CA UE is less than or equal to N (for example, N is 20), the bit numbers of the HARQ-ACK feedback information of all CCs configured by the CA UE are not changed;

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs configured by the CA UE is greater than N (for example, N is 20), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is unchanged; and carrying out space bundling on the HARQ-ACK feedback information of the CC with the MIMO working mode according to a certain method. For example, the spatial bundling is performed CC by CC according to a certain priority, until the sum of the HARQ-ACK feedback information of the spatially bundled CCs and the spatially unbundled CCs is less than or equal to N (for example, N is 20), the HARQ-ACK feedback information of the spatially unbundled CCs is not spatially bundled any more, the number of HARQ-ACK bits of the spatially bundled CCs becomes half of the original number, and the number of HARQ-ACK bits of the spatially unbundled CCs is not changed.

This process is illustrated by example 2 below.

Example 2:

suppose that the base station configures 3 CCs for CA UE, which are respectively a main CC1, an auxiliary CC2, where the main CC is TDD uplink downlink configuration 2 and a MIMO transmission mode, the auxiliary CC1 is TDD uplink downlink configuration 2 and a MIMO transmission mode, and the auxiliary CC2 is TDD uplink downlink configuration 1 and a MIMO transmission mode, as shown in fig. 7. The bundling window for the primary CC includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window for the secondary CC1 includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window for the secondary CC2 includes subframes {4,5,6}, the bundling window size is 3, the UL Grant for the scheduled PUSCH is transmitted on subframe 6 of the secondary CC2, assuming UL DAI ═ 3.

If the secondary CC2 is in MIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the secondary CC2 is 2 ═ 2 (min { M _ b, UL DAI } + M _ a)2 ═ 6 (min {3,3} + 0);

the primary CC is a MIMO transmission mode, and HARQ-ACK feedback information bit number M _ i of the primary CC is 2 ═ 2 × (min { M _ b, UL DAI } + M _ a) ═ 2 × (min {3,3} +1) ═ 8;

the secondary CC1 is a MIMO transmission mode, and the HARQ-ACK feedback information bit number M _ i of the secondary CC1 is 2 × (min { M _ b, UL DAI } + M _ a) ═ 2 × (min {3,3} +1) ═ 8.

The UE is configured with 3 CCs, and the sum of the bit numbers of the HARQ-ACK feedback information of the 3 CCs is 8+8+6 ═ 22>20, according to the above method, the HARQ-ACK feedback information of the CC whose working mode is MIMO needs to be spatially bundled according to a certain method. For example, the spatial bundling is performed CC by CC according to a certain priority, and HARQ-ACK feedback information of the primary CC, the secondary CC1, and the secondary CC2 is to be spatially bundled CC by CC according to a certain priority. Assuming that the priority of HARQ-ACK feedback information bundling of the primary CC, the secondary CC1 and the secondary CC2 is that the primary CC < secondary CC1< secondary CC2, first, spatial bundling is performed on HARQ-ACK feedback information of the secondary CC2, the bit number of the HARQ-ACK feedback information of the bundled secondary CC2 is M _ i ═ (min { M _ b, UL DAI } + M _ a) — (min {3,3} +0) ═ 3, after the secondary CC2 is spatially bundled, the sum of the bit numbers of HARQ-ACK feedback information of all CCs configured by the CA UE is 8+8+3 ═ 19<20, and the HARQ-ACK feedback information of the secondary CC1 and the primary CC is not spatially bundled any more, and the bit number of the HARQ-ACK feedback information of the primary CC is 8; the number of bits of the HARQ-ACK feedback information of the secondary CC1 is 8, and the number of bits of the HARQ-ACK feedback information of the secondary CC2 is 3.

3) When the base station determines the UL DAI in the mode 1 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, one method for the UE to determine the HARQ-ACK feedback information is as follows:

and a part of the HARQ-ACK bundling window of each CC, which is before the subframe of the UL grant of the PUSCH for sending the scheduling transmission HARQ-ACK feedback information and comprises the subframe of the UL grant of the PUSCH for sending the scheduling transmission HARQ-ACK feedback information, is called a first part of the HARQ-ACK bundling window, the number of contained downlink subframes is recorded as M _ b, a part of the HARQ-ACK bundling window of each CC, which is after the subframe of the UL grant of the PUSCH for sending the scheduling transmission HARQ-ACK feedback information, is called a second part of the HARQ-ACK bundling window, and the number of contained downlink subframes is recorded as M _ a.

The following three cases are distinguished:

i) when the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information needing to be fed back is equal to the sum of the minimum value min { UL DAI, M _ b } in the UL grant of the PUSCH for scheduling transmission of the HARQ-ACK feedback information and the size M _ b of the first part of the HARQ-ACK bundling window of the CC and the size M _ a of the second part of the HARQ-ACK bundling window of the CC, namely M _ i ═ min { UL DAI, M _ b } + M _ a;

when the bit number (namely: M _ i) of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit with 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the 3-bit HARQ-ACK information into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4,4 bits of HARQ-ACK information are mapped to 2 bits using table 3.

ii) when the working mode of the CC is MIMO and the minimum value min { UL DAI, M _ b } in the UL grant of the PUSCH for scheduling transmission of HARQ-ACK feedback information and the size M _ b of the first part of the HARQ-ACK bundling window of the CC plus the sum min { UL DAI, M _ b } + M _ a of the size of the second part of the HARQ-ACK bundling window of the CC is greater than 1, first spatially bundling the HARQ-ACK feedback information of each downlink subframe, so that the number of bits of the spatially bundled HARQ-ACK feedback information to be fed back is equal to M _ i ═ min { UL DAI, M _ b } + M _ a;

when the bit number of the HARQ-ACK feedback information (namely the bit number of the HARQ-ACK feedback information after spatial bundling) is 1, the HARQ-ACK information bit with 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the 3-bit HARQ-ACK information into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4,4 bits of HARQ-ACK information are mapped to 2 bits using table 3.

iii) when the working mode of the CC is MIMO and the minimum value min { UL DAI, M _ b } in the UL grant of the PUSCH for scheduling the transmission of the HARQ-ACK feedback information and the size M _ b of the first part of the HARQ-ACK bundling window of the CC plus the sum min { UL DAI, M _ b } + M _ a of the size of the second part of the HARQ-ACK bundling window of the CC is equal to 1, not executing the spatial bundling, and at the moment, the bit number of the HARQ-ACK feedback information is equal to 2, and the HARQ-ACK information bit with 2 bits is directly transmitted.

This process is illustrated by example 3 below.

Example 3:

If the auxiliary CC is in the SIMO transmission mode, the HARQ-ACK feedback information bit number M _ i ═ min { UL DAI, M _ b } + M _ a ═ 2 of the auxiliary CC, and the 2 HARQ-ACK information bits are directly transmitted;

the primary CC is a MIMO transmission mode, the number of bits of HARQ-ACK feedback information of the primary CC is equal to the minimum value min { UL DAI, M _ b }, which is the sum of the value of UL DAI in UL grant of PUSCH for scheduling transmission of HARQ-ACK feedback information and the size M _ b ═ 3 of the first part of HARQ-ACK bundling window of the primary CC { UL DAI, M _ b } - + M _ a ═ 1 of min { UL DAI, 3} - <2 plus the size M _ a ═ 1 of the second part of HARQ-ACK bundling window of the primary CC { UL DAI, M _ b } + M _ a ═ min {3,2} +1) > 3, spatial bundling is first performed on HARQ-ACK feedback information of each downlink subframe of the primary CC, so that the number of bits of HARQ-ACK feedback information after spatial bundling that needs to be fed back is equal to 3, and 3 bits of HARQ-ACK feedback information after spatial bundling is mapped to 2 bits.

4) When the base station determines the UL DAI in the mode 1 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, another method for the UE to determine the HARQ-ACK feedback information is as follows:

when the working mode of the CC is MIMO, the bit number of the HARQ-ACK feedback information is equal to twice of the sum of the UL DAI value in the UL grant of the PUSCH for scheduling the transmission of the HARQ-ACK feedback information and the minimum value min { UL DAI, M _ b } in the size M _ b of the first part of the HARQ-ACK bundling window of the CC and the size M _ a of the second part of the HARQ-ACK bundling window of the CC, namely M _ i is 2 (min { UL DAI, M _ b } + M _ a).

When the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is less than or equal to K (for example, K is 4), the bit numbers of the HARQ-ACK feedback information of all CCs configured by the CA UE are not changed; and when the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit with 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4,4 bits of HARQ-ACK information are mapped to 2 bits using table 3.

When the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than K (for example, K is 4), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is not changed, and when the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit of 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4, mapping the 4-bit HARQ-ACK information into 2 bits by using a table 3;

carrying out space binding on the HARQ-ACK feedback information CC of the CC with the working mode of MIMO, wherein the number of the HARQ-ACK bits is half of the original number, and when the number of the bits of the HARQ-ACK feedback information after the space binding is 1, directly transmitting the 1-bit HARQ-ACK information bits; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space bundling is 4, mapping 4 bits of HARQ-ACK information to 2 bits using table 3.

This process is illustrated by example 4 below.

Example 4:

If the auxiliary CC is in the SIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the auxiliary CC is 2;

the primary CC is a MIMO transmission mode, and the number of bits of HARQ-ACK feedback information of the primary CC is equal to 2 times M _ i ═ 2 (min { UL DAI, M _ b } + M _ a) ═ 6 of a minimum value min {2, M _ b } ═ min {2,3} ═ 2 of a sum of a value of UL DAI ═ 2 in the UL grant of the PUSCH for scheduling transmission of HARQ-ACK feedback information and a size M _ b ═ 3 of the first part of the HARQ-ACK bundling window of the primary CC plus a value M _ a ═ 1 of the second part of the HARQ-ACK bundling window of the primary CC.

The bit number of HARQ-ACK feedback information of 2 CCs configured by the CA UE is the sum Σ (M _ i) ═ 2+6 ═ 8>4, respectively, the working mode of the auxiliary CC is SIMO, the bit number of HARQ-ACK feedback information is 2, and the HARQ-ACK information bit is directly transmitted; the working mode of the primary CC is MIMO, the HARQ-ACK feedback information is spatially bundled, the number of HARQ-ACK bits becomes half of the original 6/2, which is equal to 3, and 3-bit HARQ-ACK information is mapped to 2 bits by using table 2.

5) When the base station determines the UL DAI in the mode 2 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 3, one method for the UE to determine the number of bits of the HARQ-ACK feedback information is as follows:

when the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information is equal to the minimum value M _ i of the UL DAI value in the UL grant and the size M of the HARQ-ACK bundling window of the CC, wherein the minimum value M _ i is min { UL DAI, M };

when the working mode of the CC is MIMO, the bit number of the HARQ-ACK feedback information of the CC is equal to two times M _ i ═ 2 × min { UL DAI, M } of the minimum value of UL DAI value in UL grant and HARQ-ACK bundling window size M of the CC.

when the sum of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is larger than N (for example, N is 20), the HARQ-ACK feedback information bit number of the CC with the working mode of SIMO is unchanged; the HARQ-ACK feedback information of the CC with the working mode of MIMO is subjected to space bundling, and the number of the HARQ-ACK bits is half of the original number.

This process is illustrated by example 5 below.

Example 5:

suppose that the base station configures 2 CCs for CA UE, which are a primary CC and a secondary CC, respectively, where the primary CC is TDD uplink downlink configuration 2 and MIMO transmission mode, and the secondary CC is TDD uplink downlink configuration 1 and SIMO transmission mode. The bundling window of the primary CC includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window of the secondary CC includes subframes {4,5,6}, the bundling window size is 3, the UL Grant of the scheduled PUSCH is transmitted on subframe 6 of the secondary CC, assuming that the UL DAI is 2.

If the secondary CC is in SIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the secondary CC is min { UL DAI, M } ismin {2,3} is2;

the primary CC is a MIMO transmission mode, and the HARQ-ACK feedback information bit number M _ i of the primary CC is 2 × min { UL DAI, M }, 2 × min {3,2}, 4.

The UE is configured with 2 CCs in total, the sum of the bit numbers of the HARQ-ACK feedback information of the 2 CCs is 2+4 ═ 6<20, the bit numbers of the HARQ-ACK feedback information of all CCs configured by the CA UE are not changed, that is, the bit number of the HARQ-ACK feedback information of the main CC is 4; the number of bits of the HARQ-ACK feedback information of the secondary CC is 2.

6) When the base station determines the UL DAI in the mode 2 and the terminal transmits the HARQ-ACK feedback information in the PUCCH format 3, the UE determines the bit number of the HARQ-ACK feedback information by another method as follows:

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than N (for example, N is 20), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is unchanged; performing spatial bundling on the HARQ-ACK feedback information of the CC with the MIMO operating mode according to a certain method, for example, performing spatial bundling on the CC according to a certain priority, and when the sum of the HARQ-ACK feedback information of the CC subjected to spatial bundling and the CC not subjected to spatial bundling is less than or equal to N (for example, N is 20), not performing spatial bundling on the HARQ-ACK feedback information of the CC not subjected to spatial bundling any more, where the number of HARQ-ACK bits of the CC subjected to spatial bundling becomes half of the original number, and the number of HARQ-ACK bits of the CC not subjected to spatial bundling is not changed.

This process is illustrated by example 6 below.

Example 6:

suppose that the base station configures 3 CCs for CA UE, which are respectively a main CC1, an auxiliary CC2, where the main CC is TDD uplink downlink configuration 2 and a MIMO transmission mode, the auxiliary CC1 is TDD uplink downlink configuration 2 and a MIMO transmission mode, and the auxiliary CC2 is TDD uplink downlink configuration 1 and a MIMO transmission mode, as shown in fig. 7. The bundling window for the primary CC includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window for the secondary CC1 includes subframes {4,5,6,8}, the bundling window size is 4, the bundling window for the secondary CC2 includes subframes {4,5,6}, the bundling window size is 3, the UL Grant for the scheduled PUSCH is transmitted on subframe 6 of the secondary CC2, assuming UL DAI ═ 4.

If the secondary CC2 is in MIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the secondary CC2 is 2 × min { UL DAI, M } ═ 2 × min {4, 3} ═ 6;

the primary CC is in MIMO transmission mode, and HARQ-ACK feedback information bit number M _ i ═ 2 × min { M _ b, UL DAI } ═ 2 × min {4,4} ═ 8 of the primary CC;

the secondary CC1 is a MIMO transmission mode, and the HARQ-ACK feedback information bit number M _ i of the secondary CC1 is 2 × min { M _ b, UL DAI } - [ 2 × min {4,4} - [ 8 ].

The UE is configured with 3 CCs, and the sum of the bit numbers of the HARQ-ACK feedback information of the 3 CCs is 8+8+6 ═ 22>20, according to the above method, the HARQ-ACK feedback information of the CC whose operation mode is MIMO needs to be spatially bundled according to a certain method, for example, the spatial bundling is performed CC by CC according to a certain priority. Assuming that the priority of HARQ-ACK feedback information bundling of the main CC, the auxiliary CC1 and the auxiliary CC2 is that the main CC < auxiliary CC1< auxiliary CC2, first, spatial bundling is performed on HARQ-ACK feedback information of the auxiliary CC2, the bit number of the HARQ-ACK feedback information of the bundled auxiliary CC2 is M _ i/2-6/2-3, after the auxiliary CC2 is spatially bundled, the sum of the bit numbers of HARQ-ACK feedback information of all CCs configured by the CA UE is 8+8+ 3-19 <20, the HARQ-ACK feedback information of the auxiliary CC1 and the main CC is no longer spatially bundled, and then the bit number of the HARQ-ACK feedback information of the main CC is 8; the number of bits of the HARQ-ACK feedback information of the secondary CC1 is 8, and the number of bits of the HARQ-ACK feedback information of the secondary CC2 is 3.

7) When the base station determines the UL DAI in the mode 2 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, one method for the UE to determine the HARQ-ACK feedback information is as follows:

the following three cases are distinguished:

i) when the working mode of the CC is SIMO, the bit number of HARQ-ACK feedback information of the CC is equal to the minimum value M _ i ═ min { UL DAI, M } in UL DAI values in a UL grant and a HARQ-ACK bundling window size M of the CC; when the bit number of the HARQ-ACK feedback information is 1, directly transmitting the HARQ-ACK information bit with 1 bit; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4,4 bits of HARQ-ACK information are mapped to 2 bits using table 3.

ii) when the working mode of the CC is MIMO and the UL DAI value in the UL grant and the minimum value min { UL DAI, M } >1 in the HARQ-ACK bundling window size M of the CC, spatial bundling is performed first, and the number of bits of HARQ-ACK feedback information after spatial bundling is equal to the minimum value M _ i ═ min { UL DAI, M } in the UL grant and the HARQ-ACK bundling window size M of the CC; when the bit number of the HARQ-ACK feedback information after space binding is 1, directly transmitting the HARQ-ACK information bit with 1 bit; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space bundling is 4, mapping 4 bits of HARQ-ACK information to 2 bits using table 3.

iii) when the working mode of the CC is MIMO and the UL DAI value in the UL grant and the minimum value min { UL DAI, M } in the HARQ-ACK bundling window size M of the CC are 1, the bit number of the HARQ-ACK feedback information is equal to 2, and the HARQ-ACK information bits of 2 bits are directly transmitted.

This process is illustrated by example 7 below.

Example 7:

If the auxiliary CC is in the SIMO transmission mode, the HARQ-ACK feedback information bit number M _ i of the auxiliary CC is min { UL DAI, M }, min {2,3}, or 2, and the 2 HARQ-ACK information bits are directly transmitted;

the primary CC is a MIMO transmission mode, a minimum value min { UL DAI, M } ═ min {2,4} ═ 2>1 of a UL DAI value in a UL grant and a HARQ-ACK bundling window size M of the primary CC, first, spatial bundling is performed on HARQ-ACK feedback information of each downlink subframe of the primary CC so that a bit number of the HARQ-ACK feedback information of the primary CC is equal to a minimum value M _ i ═ min { UL DAI, M } ═ min {2,4} - [ 2 ] of the UL DAI value and the HARQ-ACK bundling window size M of the primary CC, and then, the HARQ-ACK information bits of the 2 bits are directly transmitted.

8) When the base station determines the UL DAI in the mode 2 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, another method for the UE to determine the HARQ-ACK feedback information is as follows:

when the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information is equal to the minimum value M _ i ═ min { UL DAI, M } in the UL grant and the HARQ-ACK bundling window size M of the CC;

when the working mode of the CC is MIMO, the bit number of the HARQ-ACK feedback information of the CC is equal to two times M _ i ═ 2 × min { UL DAI, M } of the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size M of the CC.

When the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is less than or equal to K (for example, K is 4), the bit numbers of the HARQ-ACK feedback information of all CCs configured by the CA UE are not changed; and when the bit number of the HARQ-ACK feedback information after space binding is 1, the HARQ-ACK information bit with 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space binding is 4, mapping the 4-bit HARQ-ACK information into 2 bits by using a table 3;

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than K (for example, K is 4), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is not changed, and when the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit of 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4, mapping the 4-bit HARQ-ACK information into 2 bits by using a table 3; carrying out space binding on the HARQ-ACK feedback information CC of the CC with the MIMO working mode, wherein the number of the HARQ-ACK bits is half of the original number, and when the number of the HARQ-ACK feedback information bits after the space binding is 1, directly transmitting the 1-bit HARQ-ACK information bits; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space bundling is 4, mapping 4 bits of HARQ-ACK information to 2 bits using table 3.

This process is illustrated by example 8 below.

Example 8:

suppose that a base station configures 2 CCs for CA UE, which are respectively a primary CC and a secondary CC, the primary CC is TDD uplink downlink configuration 2 and MIMO transmission mode, the secondary CC is TDD uplink downlink configuration 1 and SIMO transmission mode, a bundling window of the primary CC includes subframes {4,5,6,8}, a bundling window size is 4, a bundling window of the secondary CC includes subframes {4,5,6}, a bundling window size is 3, and a UL Grant of a scheduled PUSCH is transmitted on subframe 6 of the secondary CC, assuming that UL DAI ═ 2.

the primary CC is a MIMO transmission mode, and the number of bits of HARQ-ACK feedback information of the primary CC is equal to 2 × min { UL DAI, M } -2 × min {2,4} -4 of the minimum value of the UL DAI value and the HARQ-ACK bundling window size M of the primary CC.

The bit number of the HARQ-ACK feedback information of 2 CCs configured by the CA UE is the sum Σ (M _ i) ═ 2+4 ═ 6>4 of 2 and 4, respectively, the working mode of the auxiliary CC is SIMO, the bit number of the HARQ-ACK feedback information is unchanged, and the HARQ-ACK information bit of 2 bits is directly transmitted; the working mode of the main CC is MIMO, the HARQ-ACK feedback information CC is spatially bundled, the number of HARQ-ACK bits is half of the original number M _ i/2 4/2 2, and 2 bits of HARQ-ACK information bits are directly transmitted.

9) When the base station determines the UL DAI by adopting the mode 3 and the terminal transmits HARQ-ACK feedback information by adopting the PUCCH format 3, the method for the UE to determine the bit number of the HARQ-ACK feedback information comprises the following steps:

This process is illustrated by example 9 below.

Example 9:

the primary CC is a MIMO transmission mode, and HARQ-ACK feedback information bit number M _ i of the primary CC is 2 × min { UL DAI, M }, 2 × min {3,2} ═ 4;

10) When the base station determines the UL DAI by adopting the mode 3 and the terminal transmits the HARQ-ACK feedback information by adopting the PUCCH format 3, the other method for the UE to determine the bit number of the HARQ-ACK feedback information is as follows:

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than N (for example, N is 20), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is unchanged; performing spatial bundling on the HARQ-ACK feedback information of the CC with the MIMO operating mode according to a certain method, for example, performing spatial bundling on the CCs one by one according to a certain priority until the sum of the HARQ-ACK feedback information of the CCs subjected to the spatial bundling and the CCs not subjected to the spatial bundling is less than or equal to N (for example, N is 20), not performing the spatial bundling on the HARQ-ACK feedback information of the CCs not subjected to the spatial bundling any more, wherein the number of HARQ-ACK bits of the CCs subjected to the spatial bundling becomes half of the original number, and the number of HARQ-ACK bits of the CCs not subjected to the spatial bundling is not changed.

This process is illustrated by example 10 below.

Example 10:

11) When the base station determines the UL DAI in the mode 3 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, one method for the UE to determine the HARQ-ACK feedback information is as follows:

the following three cases are distinguished:

i) when the working mode of the CC is SIMO, the bit number of HARQ-ACK feedback information is equal to the minimum value M _ i ═ min { UL DAI, M } in UL DAI value in ULGrant and HARQ-ACK bundling window size M of the CC, and when the bit number of the HARQ-ACK feedback information is 1, 1-bit HARQ-ACK information bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4, mapping the 4-bit HARQ-ACK information into 2 bits by using a table 3;

ii) when the working mode of the CC is MIMO and the UL DAI value in the UL grant and the minimum value min { UL DAI, M } >1 in the HARQ-ACK bundling window size M of the CC, spatial bundling is performed first, and the number of bits of HARQ-ACK feedback information after spatial bundling is equal to the minimum value M _ i ═ min { UL DAI, M } in the UL grant and the HARQ-ACK bundling window size M of the CC; and when the bit number of the HARQ-ACK feedback information after space binding is 1, the HARQ-ACK information bit with 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space bundling is 4, mapping 4 bits of HARQ-ACK information to 2 bits using table 3.

This process is illustrated by example 11 below.

Example 11:

the base station is assumed to configure 2 CCs for CA UE, which are respectively a primary CC and a secondary CC, the primary CC is TDD uplink downlink configuration 2, MIMO transmission mode, the secondary CC is TDD uplink downlink configuration 1, SIMO transmission mode, a bundling window of the primary CC includes subframes {4,5,6,8}, a bundling window size is 4, a bundling window of the secondary CC includes subframes {4,5,6}, a bundling window size is 3, a UL Grant of PUSCH is scheduled to be transmitted on subframe 6 of the secondary CC, and it is assumed that UL DAI ═ 2.

the primary CC is in a MIMO transmission mode, and a minimum value min { UL DAI, M } ═ min {2,4} ═ 2>1 of a UL DAI value in a UL grant and a HARQ-ACK bundling window size M of the primary CC, first, HARQ-ACK feedback information of each downlink subframe of the primary CC is spatially bundled so that a bit number of the HARQ-ACK feedback information of the primary CC is equal to a minimum value M _ i ═ min { UL DAI, M } ═ min {2,4} - [ 2 ] of the UL DAI value and the HARQ-ACK bundling window size M of the primary CC, and then, the HARQ-ACK information bits of the 2 bits are directly transmitted.

12) When the base station determines the UL DAI in the mode 3 and the terminal transmits HARQ-ACK feedback information in the PUCCH format 1b with channel selection, another method for the UE to determine the HARQ-ACK feedback information is as follows:

when the sum Σ (M _ i) of the HARQ-ACK feedback information bit numbers of all CCs of the CA UE is greater than K (for example, K is 4), the HARQ-ACK feedback information bit number of the CC whose operation mode is SIMO is not changed, and when the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit of 1 bit is directly transmitted; when the bit number of the HARQ-ACK feedback information is 2, directly transmitting the HARQ-ACK information bit with 2 bits; when the bit number of the HARQ-ACK feedback information is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information is 4, mapping the 4-bit HARQ-ACK information into 2 bits by using a table 3; carrying out space binding on the HARQ-ACK feedback information CC of the CC with the working mode of MIMO, wherein the number of the HARQ-ACK bits is half of the original number, and when the number of the bits of the HARQ-ACK feedback information after the space binding is 1, directly transmitting the 1-bit HARQ-ACK information bits; when the bit number of the HARQ-ACK feedback information after space binding is 2, directly transmitting the HARQ-ACK information bits with 2 bits; when the bit number of the HARQ-ACK feedback information after space binding is 3, mapping the HARQ-ACK information with 3 bits into 2 bits by using a table 2; when the bit number of the HARQ-ACK feedback information after space bundling is 4, mapping 4 bits of HARQ-ACK information to 2 bits using table 3.

This process is illustrated by example 12 below.

Example 12:

the primary CC is a MIMO transmission mode, and the number of bits of HARQ-ACK feedback information of the primary CC is equal to 2 × min { UL DAI, M }, 2 × min {2,4}, 4 of the minimum value of the UL DAI value and the HARQ-ACK bundling window size M of the primary CC.

It can be seen from the foregoing embodiments that, in the method for sending HARQ-ACK feedback information provided by the present invention, the bit number of the HARQ-ACK feedback information is determined according to the value of the UL DAI of the CC to which the PUSCH for sending the HARQ-ACK feedback information belongs and the bundling window size of each CC, so that correct HARQ-ACK feedback information transmission can be performed in CA systems with different uplink and downlink configurations of multiple CCs, and thus different uplink and downlink configurations of multiple CCs for carrier aggregation are effectively supported.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for sending HARQ-ACK feedback information is used for the condition that TDD uplink and downlink configurations of a plurality of component carrier CCs in carrier aggregation CA are different, and is characterized by comprising the following steps:

a user terminal UE receives an uplink grant (UL grant) sent by a base station, and acquires a downlink allocation index (UL DAI) from the UL grant;

the method comprises the steps that UE sends HARQ-ACK feedback information on a Physical Uplink Shared Channel (PUSCH), wherein the bit number of the HARQ-ACK feedback information is determined according to a UL DAI value in a UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size Bundling window size of a Bundling window;

when the working mode of the CC is single-input multi-output SIMO, the bit number of the original HARQ-ACK feedback information is equal to the minimum value of the UL DAI value in the UL grant and the size of the HARQ-ACK bundling window of the CC;

when the working mode of the CC is MIMO, the bit number of the original HARQ-ACK feedback information is equal to twice of the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC.

2. The method of claim 1, wherein:

and the UE transmits HARQ-ACK feedback information by adopting PUCCH format 3.

3. The method of claim 1, wherein: the values of the UL DAI are as follows: and indicating the reference value of a bundling window used for calculating the bit number of the HARQ-ACK feedback information in the HARQ-ACK bundling window corresponding to each CC for sending the HARQ-ACK feedback information in the same PUSCH.

4. The method of claim 2, wherein:

the values of the UL DAI are as follows: and indicating the reference value of a bundling window used for calculating the bit number of the HARQ-ACK feedback information in the HARQ-ACK bundling window corresponding to each CC for sending the HARQ-ACK feedback information in the same PUSCH.

5. The method according to any one of claims 1 to 4, characterized in that:

sequentially calculating the bit number of original HARQ-ACK feedback information of all CCs configured by the UE;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is less than or equal to N, keeping the bit numbers of the HARQ-ACK feedback information of all the CCs unchanged; wherein N is a preset integer;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than N, keeping the bit number of the HARQ-ACK feedback information of the CC with the working mode of SIMO unchanged; and carrying out space binding on the HARQ-ACK feedback information of the CC with the MIMO working mode, so that the bit number of the HARQ-ACK feedback information is half of the bit number of the original HARQ-ACK feedback information.

6. The method according to any one of claims 1 to 4, characterized in that:

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than N, keeping the bit number of the HARQ-ACK feedback information of the CC with the working mode of SIMO unchanged; and carrying out space binding on the HARQ-ACK feedback information of the CC with the MIMO working mode according to the preset priority level CC by CC until the sum of the bit numbers of the HARQ-ACK feedback information of the CC which is subjected to space binding and the CC which is not subjected to space binding is less than or equal to N, not carrying out space binding on the HARQ-ACK feedback information of the CC which is not subjected to space binding any more, wherein the bit number of the HARQ-ACK feedback information of the CC which is subjected to space binding is half of the bit number of the original HARQ-ACK feedback information, and the bit number of the HARQ-ACK feedback information of the CC which is not subjected to space binding is kept unchanged.

7. The method according to any one of claims 1 to 4, characterized in that:

when the working mode of the CC is SIMO, the bit number of HARQ-ACK feedback information is kept unchanged;

when the working mode of the CC is MIMO and the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC is larger than 1, carrying out spatial bundling on the HARQ-ACK feedback information of the CC to ensure that the bit number of the HARQ-ACK feedback information is equal to the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC;

when the working mode of the CC is MIMO and the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC is equal to 1, the bit number of the HARQ-ACK feedback information of the CC is kept unchanged;

if the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit of 1 bit is directly transmitted; if the bit number of the HARQ-ACK feedback information is 2, the HARQ-ACK information bit with 2 bits is directly transmitted; if the bit number of the HARQ-ACK feedback information is 3, the 3-bit HARQ-ACK information is mapped into 2 bits by using the table 1; if the bit number of the HARQ-ACK feedback information is 4, the 4-bit HARQ-ACK information is mapped into 2 bits by using the table 2; wherein:

HARQ-ACK’(0),HARQ-ACK’(1),HARQ-ACK’(2) post-mapping state A,A,A A,A A,A,N/D N/D,A A,N/D,any A,N/D N/D,any,any N/D,N/D

TABLE 1

TABLE 2

Wherein, A indicates HARQ-ACK information ACK, N indicates HARQ-ACK information NACK, D indicates HARQ-ACK information DTX, any indicates any HARQ-ACK '(0), HARQ-ACK' (1), HARQ-ACK '(2) and HARQ-ACK' (3) indicate HARQ-ACK information before mapping.

8. The method according to any one of claims 1 to 4, characterized in that:

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is less than or equal to K, keeping the bit numbers of the HARQ-ACK feedback information of all the CCs unchanged, wherein K is a preset integer;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than K, keeping the bit number of the HARQ-ACK feedback information of the CC with the working mode of SIMO unchanged; performing spatial binding on the HARQ-ACK feedback information of the CC with the MIMO working mode, so that the bit number of the HARQ-ACK feedback information is changed to be half of the original bit number;

TABLE 1

TABLE 2

9. A user equipment, configured to use when TDD uplink and downlink configurations of a plurality of CCs in a CA are different, the user equipment comprising:

a module for receiving a UL grant sent by a base station and acquiring a UL DAI from the UL grant;

a module for sending HARQ-ACK feedback information on a PUSCH, wherein the bit number of the HARQ-ACK feedback information is determined according to a UL DAI value in a UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and a size Bundling window size of a Bundling window;

when the working mode of the CC is SIMO, the bit number of the original HARQ-ACK feedback information is equal to the minimum value of the UL DAI value in the UL grant and the size of the HARQ-ACK bundling window of the CC;

10. The apparatus of claim 9, wherein:

and the HARQ-ACK feedback information is transmitted by adopting PUCCH format 3.

11. The apparatus of claim 9, wherein:

12. The apparatus of claim 10, wherein:

13. The apparatus according to any one of claims 9 to 12, characterized in that it further comprises means for:

14. The apparatus according to any one of claims 9 to 12, wherein:

15. The apparatus according to any one of claims 9 to 12, wherein:

TABLE 1

TABLE 2

16. The apparatus according to any one of claims 9 to 12, wherein:

TABLE 1

TABLE 2

17. A method for receiving HARQ-ACK feedback information is used for the condition that TDD uplink and downlink configurations of a plurality of CCs in a CA are different, and the method is characterized by comprising the following steps:

a base station sends a UL grant to UE, wherein the UL grant comprises a UL DAI;

a base station receives HARQ-ACK feedback information sent by UE on a PUSCH, wherein the bit number of the HARQ-ACK feedback information is determined according to a UL DAI value in a UL Grant of the PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size Bundling window size of a Bundling window:

18. The method of claim 17, wherein: and the HARQ-ACK feedback information adopts PUCCH format 3.

19. The method of claim 17, wherein:

20. The method of claim 18, wherein:

21. The method according to any one of claims 17 to 20, wherein:

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is less than or equal to N, keeping the bit numbers of the HARQ-ACK feedback information of all the CCs received by the base station unchanged with the corresponding original HARQ-ACK feedback information; wherein N is a preset integer;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than N, the bit number of the HARQ-ACK feedback information of the CC with the SIMO working mode received by the base station and the corresponding original HARQ-ACK feedback information are kept unchanged; the HARQ-ACK feedback information of the CC with the MIMO working mode is half of the bit number of the original HARQ-ACK feedback information.

22. The method according to any one of claims 17 to 20, wherein:

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is less than or equal to N, the bit number of the HARQ-ACK feedback information of all the CCs received by the base station is kept unchanged; wherein N is a preset integer;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than N, the bit number of the HARQ-ACK feedback information of the CC with the SIMO working mode received by the base station is kept unchanged; and performing space binding on the HARQ-ACK feedback information of the CC with the working mode of MIMO according to a preset priority level by CC until the sum of the bit numbers of the HARQ-ACK feedback information of the CC subjected to space binding and the CC not subjected to space binding is less than or equal to N, not performing space binding on the HARQ-ACK feedback information of the CC not subjected to space binding, wherein the bit number of the HARQ-ACK feedback information of the CC subjected to space binding is half of the bit number of the original HARQ-ACK feedback information, and the bit number of the HARQ-ACK feedback information of the CC not subjected to space binding is kept unchanged.

23. The method according to any one of claims 17 to 20, wherein:

when the working mode of the CC is SIMO, the bit number of the HARQ-ACK feedback information received by the base station is kept unchanged;

when the working mode of the CC is MIMO and the minimum value between the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC is larger than 1, the HARQ-ACK feedback information of the CC received by the base station is spatially bundled, so that the bit number of the HARQ-ACK feedback information is equal to the minimum value between the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC;

when the working mode of the CC is MIMO and the minimum value of the UL DAI value in the UL grant and the HARQ-ACK bundling window size of the CC is equal to 1, the bit number of the HARQ-ACK feedback information received by the base station is kept unchanged;

if the bit number of the HARQ-ACK feedback information is 1, the HARQ-ACK information bit of 1 bit is directly transmitted; if the bit number of the HARQ-ACK feedback information is 2, the HARQ-ACK information bit of 2 bits is directly transmitted; if the bit number of the HARQ-ACK feedback information is 3, the 3-bit HARQ-ACK information is mapped into 2 bits by using the table 1; if the bit number of the HARQ-ACK feedback information is 4, the 4-bit HARQ-ACK information is mapped into 2 bits by using the table 2; wherein:

TABLE 1

TABLE 2

24. The method according to any one of claims 17 to 20, wherein:

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is less than or equal to K, keeping the bit numbers of the HARQ-ACK feedback information of all the CCs received by the base station unchanged, wherein K is a preset integer;

when the sum of the bit numbers of the original HARQ-ACK feedback information of all the CCs is larger than K, the bit number of the HARQ-ACK feedback information of the CC with the SIMO working mode received by the base station is kept unchanged; HARQ-ACK feedback information of CC with the working mode of MIMO is spatially bundled, so that the bit number of the HARQ-ACK feedback information is changed to be half of the original bit number;

TABLE 1

TABLE 2

25. A base station, configured for a case where TDD uplink and downlink configurations of a plurality of CCs in a CA are different, comprising:

means for transmitting a UL grant to a UE, the UL grant including a UL DAI;

a module for receiving HARQ-ACK feedback information sent by UE on PUSCH, wherein the bit number of the HARQ-ACK feedback information is determined according to the UL DAI value in the UL Grant of PUSCH for scheduling and transmitting the HARQ-ACK feedback information and the size Bundling window size of a Bundling window;

26. The base station of claim 25, wherein: and the HARQ-ACK feedback information adopts PUCCH format 3.

27. The base station of claim 25, wherein:

28. The base station of claim 26, wherein:

29. The base station according to any of claims 25 to 28, characterized by:

30. The base station according to any of claims 25 to 28, characterized by:

31. The base station according to any of claims 25 to 28, characterized by:

TABLE 1

TABLE 2

32. The base station according to any of claims 25 to 28, characterized by:

TABLE 1

TABLE 2