WO2012088877A1

WO2012088877A1 - Method for sending acknowledgement information and user equipment

Info

Publication number: WO2012088877A1
Application number: PCT/CN2011/077494
Authority: WO
Inventors: 杨维维; 戴博; 梁春丽
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-28
Filing date: 2011-07-22
Publication date: 2012-07-05
Also published as: CN102064921A; CN102064921B

Abstract

Disclosed are a method for sending acknowledgement information and a user equipment, for solving the problem that ACK/NACK acknowledgement information cannot be transmitted on a PUSCH in a carrier aggregation scenario. According to the present invention, in the carrier aggregation scenario, a UE first acquires a bit sequence of the ACK/NACK acknowledgement information to be transmitted, then calculates the number of code modulation symbols required for transmitting the bit sequence of the ACK/NACK acknowledgement information on the PUSCH, and finally sends the ACK/NACK acknowledgement information on the PUSCH. The present invention effectively solves the problem that the ACK/NACK acknowledgement information cannot be transmitted on the PUSCH in the carrier aggregation scenario.

Description

Method for transmitting response information and user terminal

The present invention relates to the field of mobile wireless communications, and in particular to a method for transmitting response information and a user equipment (User Equipment, UE) in a wireless communication system. Background technique

The Radio Frame in the Long Term Evolution (LTE) system includes a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode frame structure. As shown in Figure 1, in the FDD mode frame structure, a 10 msec (ms) radio frame consists of twenty slots of length 0.5 ms and numbers 0-19, slots 2i and 2i. +l constitutes a subframe (frame) i of length 1 ms (where 0 ≤ i ≤ 9). As shown in FIG. 2, in the frame structure of the TDD mode, a 10 ms radio frame is composed of two half frames of 5 ms length, and one subframe includes five subframes of length 1 ms, and subframes. i is defined as a combination of two time slots 2i and 2i+1 that are 0.5 ms long (where 0 ≤ i ≤ 9).

In the above two frame structures, the standard cyclic prefix (Normal Cyclic Prefix, Normal) is used.

In CP), one slot contains 7 symbols, and when Extended Cyclic Prefix (Extended CP) is used, one slot contains 6 symbols.

The uplink and downlink configurations supported by each subframe are shown in Table 1. Wherein, "D" denotes a subframe dedicated to downlink transmission, "U" denotes a subframe dedicated for uplink transmission, and "S" denotes for DwPTS (Downlink Pilot Time Slot), guard interval (Guard) Special sub-frames of the three fields, Period, GP) and UpPTS (Uplink Pilot Time Slot). Table 1 Schematic diagram of the uplink and downlink configuration supported by each sub-frame

As can be seen from the above table, LTE TDD supports 5ms and 10ms uplink and downlink switching cycles. If the downlink to uplink transition point period is 5ms, the special subframe will exist in two fields; if the downlink to uplink transition point period is 10ms, the special subframe exists only in the first field; subframe #0 and sub Frame #5 and DwPTS are always used for downlink transmission; UpPTS and subframes immediately following the special subframe are dedicated to uplink transmission.

In the frequency division duplex FDD system, since the uplink and downlink subframes are corresponding, when the physical downlink shared channel (PDSCH) contains only one codeword stream, the user terminal needs to feed back a 1-bit ACK. /NACK response information, when the PDSCH includes two codeword streams, the UE needs to feed back 2 bits of ACK/NACK response information, when the UE does not have a PUSCH (Physical Uplink Share Channel) to transmit in the current subframe. The UE will transmit the 1-bit or 2-bit ACK/NACK response information in the format la/lb on the PUCCH (Physical Uplink Control Channel); and when the UE has the PUSCH transmission in the current subframe, The UE maps the 1-bit or 2-bit information to a corresponding bit through a certain ACK/NACK state, and performs channel coding, scrambling, and modulation, and then multiplexes with the data, and then transmits the signal on the PUSCH.

In the time division duplex TDD system, since the uplink and downlink subframes are not corresponding, that is, the ACK/NACK response information corresponding to the multiple downlink subframes needs to be sent on the PUCCH/PUSCH channel of one uplink subframe, where the uplink The set of downlink subframes corresponding to the subframe constitutes a bundling window. In LTE TDD, two types of ACK/NACK response information are defined: one is an ACK/NACK bundling method, and the other is ACK/NACK multiplexing method: The high-level configuration of the UE uses bundling or mulitplexing. The basic idea of the ACK/NACK bundling method is to use the ACK of the codeword stream corresponding to each downlink subframe that needs to be fed back in the uplink subframe. The /NACK message performs a time domain bundling to obtain a 1-bit or bit ACK/NACK response message. When the UE does not transmit a PUSCH in the current subframe, the UE will transmit the format la/lb on the PUCCH. The 1-bit or 2-bit ACK/NACK response information; when the UE has a PUSCH transmission in the current subframe, the UE transmits the 1-bit or 2-bit information on the PUSCH after a certain channel coding and channel interleaving. The core idea of the multiplexing method is to use different PUCCH channels and different modulation symbols on the channel to indicate different feedback states of the downlink subframes that need to be fed back in the uplink subframe. If there are multiple transport blocks on the downlink subframe, then The ACK/NACK fed back by the plurality of transport blocks of the downlink subframe is logically (bundled) and then channel selected, and then transmitted using PUCCH format lb. When the UE has no PUSCH to transmit in the current subframe, the UE will transmit the multiple ACK/NACK response information in the format lb with channel selection on the PUCCH; when the UE is in the current subframe When there is PUSCH transmission, the UE transmits a plurality of bit information through a certain ACK/NACK state to a corresponding bit, and performs channel coding, channel interleaving, and data multiplexing, and then transmits on the PUSCH.

The encoding process when the response information is transmitted on the PUSCH includes: 4.M _c (Formula 1)

First, the number of required coding symbols is calculated according to the above (Formula 1); where Ο represents the number of bits of the uplink control information to be transmitted; MTM represents the bandwidth of the current subframe for PUSCH transmission, represented by the number of carriers; N _s ^P _y : ^H - ^initial indicates that the initial PUSCH transmission is used in addition to the Demodulation Reference Signal (DMRS) and the measurement reference signal (Sounding) The number of symbols outside the Reference Signal, SRS); M _S ^P _C ^USCH - ^initial indicates the bandwidth of the initial PUSCH transmission, expressed in the number of subcarriers; C indicates the corresponding code block after the CRC and the code block are divided by the transport block. Number; indicates the number of bits corresponding to each code block of the transport block; for the same transport block, C and M _S ^P _C ^USCH - ^{INITIAL are} obtained from the initial PDCCH; when there is no PDCCH of the initial DCI format 0, M _S ^P _C ^USCH - ^INITIAL , C and can be obtained in the following two ways: (1) When the initial PUSCH is used for semi-persistent scheduling, it can be obtained from the PDCCH of the most recent semi-persistent scheduling configuration; (2) When the PUSCH is randomly When the access response authorization is triggered, the access is obtained from the random access response authorization corresponding to the same transport block;

The value is configured by the upper layer; then channel coding is performed, and the bits encoded by the ACK/NACK response information are repeated until the target length 2^ = 2^* is satisfied, and the encoded information bits are respectively recorded as [^, ^ ..., ^ ], according to the modulation order, generate a corresponding coded modulation sequence [^, ..., ^],

[q ^ACK , q ^ACK , q ^ACK , . . . , q ^ACK ] and the encoded data and/or other encoded uplink control information are channel interleaved and transmitted.

In order to meet the requirements of the International Telecommunication Union-Advanced (ITU-Advanced), the Long Term Evolution Advanced (LTE-A) system, which is an LTE evolution standard, needs to support a larger system bandwidth (up to 100MHz), and need to be backward compatible with LTE existing standards. On the basis of the existing LTE system, a larger bandwidth can be obtained by combining the bandwidths of the LTE system. This technology is called Carrier Aggregation (CA) technology. This technology can improve the spectrum utilization of the IMT-Advance system, alleviate the shortage of spectrum resources, and optimize the utilization of spectrum resources. The carrier aggregation LTE system bandwidth can be regarded as a component carrier (CC), and each component carrier frequency can also be referred to as a cell (Cell), that is, one spectrum can be aggregated by n component carriers (Cell). Made. The resources of one R10 UE are composed of n cells (component carriers) in the frequency domain, where one cell is called a primary cell and the other cells are called secondary cells. In a carrier aggregation scenario, multiple downlink subframes correspond to one uplink subframe, and each downlink subframe has multiple cells, and each cell may be transmitted by one transport block according to different transmission modes, or may be composed of two transport blocks. Transmission, as defined in the prior art: In the LTE-A time division duplex system, when the ACK/NACK response information is transmitted on the PUCCH, two transmission modes are defined: PUPUCCH format lb with channel selection and DFT-s-OFDM In the mode (PUCCH format3), when ACK/NACK response information is sent by using formatlb with channel selection, bundling is not used for ACK/NACK response information of 4 bits or less, and ACK/NACK response information of more than 4 bits can be used. With spatial bundling and time-domain bundling, when sending ACK/NACK response information using format3, the maximum payload of the ACK/NACK response message sent is 20 bits, but the prior art does not give ACK/NACK response information during PUSCH transmission. The mapping relationship and the method of determining the load size, so that the transmission of the ACK/NACK response information on the PUSCH cannot be implemented. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method for transmitting ACK/NACK response information on a physical uplink shared channel and a corresponding user terminal, and solving the problem that the ACK/NACK response information cannot be sent on the PUSCH in the carrier aggregation scenario. .

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

FIG. 3 is a flowchart of a method for sending response information according to the present invention. The response information refers to correct or incorrect (ACK/NACK) response information fed back by the UE to the base station, and the main steps are as follows:

Step 302: In a scenario of carrier aggregation, the UE acquires an ACK/NACK response information bit sequence that needs to be sent according to related information.

Step 304: The UE calculates a number of coded modulation symbols required to transmit a bit sequence of the ACK/NACK response information on the PUSCH.

Step 306: The UE sends an ACK/NACK response message on the PUSCH. The ACK/NACK response information bit sequence that the UE needs to send according to the related information in step 302 refers to: the number of downlink component carriers (or cells) configured by the UE according to the base station, the ratio of the uplink and downlink subframes configured, and each downlink configured. The transmission mode of the component carrier (or cell) and the number of ACK/NACK response information bits that can be transmitted at the PUSCH to determine the ACK/NACK response information to be transmitted, and mapping the ACK/NACK response information to be transmitted to the corresponding Bit sequence

Or in step 302, the UE acquires a bit sequence of the ACK/NACK response information to be sent according to the feedback mode of the high layer configuration:

If the upper layer configuration sends the ACK/NACK response information in the manner of the format lb joint channel selection, the ACK/NACK response information bit sequence to be transmitted is determined according to the ACK/NACK information in the mapping table of the channel selection manner;

If the upper layer configuration sends the ACK/NACK response information in the manner of the format 3, the number of the downlink component carriers (or cells) configured by the UE, the transmission mode configured for each downlink component carrier (or cell), and the proportional relationship between the uplink and downlink subframes The number of ACK/NACK response information bits that can be transmitted at most on the PUSCH is used to determine ACK/NACK response information to be transmitted, and the ACK/NACK response information to be transmitted is mapped into the bit sequence.

Further, if at most 40 bits of ACK/NACK response information can be transmitted on the PUSCH, the component carrier (or cell) according to the pre-codeword stream, the order of the sub-frames, or the sub-frame of the first codeword stream, and then the component The order of the carriers (or cells), mapping the corresponding ACK/NACK response information into the bit sequence;

Further, if the M-bit ACK/NACK response information can be transmitted at most on the PUSCH, and the ACK/NACK response information that needs to be transmitted exceeds the M-bit, the ACK/NACK bit sequence can be obtained by one of the following methods:

Manner 1: When the ACK/NACK response information is mapped to the bit sequence, logically AND operation is performed on all ACK/NACK response information corresponding to the PDSCH of the two codeword streams, and the logical AND The ACK/NACK response information after operation is mapped into the corresponding bit sequence;

Manner 2: logically AND the two ACK/NACK response information corresponding to the PDSCH according to a predefined method, until the total number of bits of the ACK/NACK response information to be sent does not exceed M bits, and then the logical AND operation The ACK/NACK response information is mapped into a corresponding bit sequence, wherein the predefined method is one of the following methods:

(1) logically AND operation the ACK/NACK response information corresponding to the PDSCH of the two codeword streams in all the secondary component carriers (or cells);

Further, if the ACK/NACK response information corresponding to the PDSCH corresponding to the PDSCH of the two codeword streams in all the secondary component carriers (or cells) is logically AND, the total number of bits of the ACK/NACK response information exceeds M bits, And logically ANDing the ACK/NACK response information corresponding to the PDSCH of the 2 codeword streams in the primary component carrier (or cell);

(2) logically and operatively ACK/NACK response information corresponding to all PDSCHs of the two codeword streams in the component carrier (or cell) according to the order of the component carrier (or cell) from low to high. Until the total number of bits of the ACK/NACK response message does not exceed M;

(3) logically AND-operating the ACK/NACK response information corresponding to the PDSCH of the two codeword streams in all component carriers (or cells) corresponding to the subframe according to the sequence of the subframes until the total of the ACK/NACK response information The number of bits does not exceed M;

(4) Sort all PDSCHs according to the order of the sub-frame post-component carrier (cell) or the first component carrier (or cell) sub-frame, and include 2 codes one by one in the order from back to front or from front to back. The ACK/NACK response information corresponding to the PDSCH of the word stream is logically ANDed until the total number of bits of the ACK/NACK response information does not exceed M;

Further, M is a fixed value agreed by the base station and the UE, Me {20, 21, 22, 23, 24, 25, 26}

When mapping the ACK/NACK response information into a bit sequence, the mapping method is one of the following methods:

Method 1: Mapping in accordance with a predefined component carrier (or cell), for the same The ACK/NACK response information of a component carrier (or cell) is mapped according to the sequence of subframes or according to the value of the downlink assignment index (DAI) in the downlink grant information (DL assignment), and the ACK/released by the semi-static persistent scheduling is performed. The NACK response information is located at the front or the end of the ACK/NACK response information fed back by the component carrier (or cell) in which it is located;

The predefined component carrier (or cell) sequence is a high-level configuration, or the predefined component carrier (or cell) sequence is a component carrier (or cell) index sequence, or the primary component carrier (or cell) is supplemented. Component carrier (or cell);

The number of ACK/NACK response information fed back by each component carrier (or cell) is determined by the configured number of downlink subframes and the transmission mode, or by the configured number of downlink subframes and the transmission mode, and the uplink grant information (UL grant). The value of the downlink allocation index is determined;

Method 2: mapping according to the sequence of subframes, and ACK/NACK response information on the same subframe is sequentially mapped according to a predefined component carrier (or cell);

The predefined component carrier (or cell) sequence is a high-level configuration, or the predefined component carrier (or cell) sequence is a component carrier (or cell) index sequence, or the primary component carrier (or cell) is supplemented. Component carrier (or cell).

Further, when the UE does not detect the PDSCH on the configured corresponding downlink component carrier (or cell), the corresponding response information is set to NACK;

Further, when the base station configures that a certain codeword stream (transport block) in the two codeword streams (transport blocks) corresponding to the PDSCH is not enabled and the ACK/NACK response information corresponding to the PDSCH is not logically operated, then The response information of the codeword stream corresponding to the unenabled transport block is set to NACK;

Further, when the base station configures that a certain codeword stream in the two codeword streams (transport blocks) corresponding to the PDSCH is not enabled and sends the ACK/NACK response information corresponding to the PDSCH to perform logical AND operation, the disabling is disabled. The ACK/NACK response information corresponding to the codeword stream (transport block) is set to ACK, or the logical and operation result of the ACK/NACK response information corresponding to the PDSCH is Enable ACK/NACK response information corresponding to the codeword stream (transport block);

Further, the method for obtaining the ACK/NACK response information bit sequence to be transmitted is also applicable to transmitting the ACK/NACK response information in the format 3 on the PUCCH;

Further, in the present invention, the correct response information (ACK) corresponds to a binary "1", and the error response information (NACK) corresponds to a binary "0."

In step 304, if the ACK/NACK response information is transmitted on the PUSCH, it is not encoded by the dual Reed-Muller (Dual RM) method, and the ACK/ is transmitted on the PUSCH. When the number of coded modulation symbols required for the bit sequence of the NACK response information is set, the number of bits O of the uplink control information to be transmitted is obtained by one of the following methods:

(1) When the UE transmits the PUSCH according to the uplink grant UL grant information, 0 = V _D ^U _A ^L ₁ , or

C = TB _max , or O = min( TB _max , O 0 = V _D ^U ^TB ); when UE is not root c=0

When the PUSCH is transmitted according to the uplink grant information UL grant information, O is equal to the length of the bit sequence of the obtained ACK/NACK response information, where is the downlink assignment index in the uplink grant information UL grant, indicating the PDSCH sent by the base station to the UE. The total number or the maximum number of downlink subframes in the feedback ACK/NACK response message in all component carriers (or cells); as long as one PDSCH corresponds to 2 transport blocks, TB = 2; otherwise, TB _max = l; 73⁄4 _max ( _c ), _c = 0,l,...C - l represents the maximum value of the transport block in the component carrier (or cell) c, and C is the number of component carriers (or cells) configured by the UE; O _max Indicates the maximum number of bits that the UE feeds back the ACK/NACK response message, and Κ indicates that the configured uplink-downlink subframe ratio is in the downlink.

The number of subframes, the maximum number of bits of the correct error response message corresponding to the PDSCH on the downlink component carrier (or cell) of the TB table, or 0 indicates that the ACK/NACK response message is logically and operationally fed back. Maximum number of bits;

(2) (equal to the length of the obtained bit sequence;

(3) (equal to the TB corresponding to the ACK/NACK response message received by the UE and semi-static persistent Scheduling the number of ACK/NACK response messages released;

Further, if the ACK/NACK response information is transmitted on the PUSCH, the code is coded by the Dual RM, and the number of coded modulation symbols required for the calculation is jointly calculated, and the number of bits of the uplink control information to be transmitted is calculated. Get it in one of the following ways:

(1) When the UE transmits the PUSCH according to the uplink grant UL grant information, 0 = 2, when the UE does not transmit the PUSCH according to the UL grant information, O is equal to the length of the bit sequence of the obtained ACK/NACK response information; ₇ indicates the allocation The maximum number of PDSCHs corresponding to the ACK/NACK response information in the two RMs;

(2) When the UE transmits the PUSCH according to the uplink grant UL grant information, 0 = V _D ^U _A ^L ₁ , or

C = TB _max , or O = min( TB _max , O 0 = V _D ^U ^TB ); when the UE does not transmit the PUSCH according to the uplink grant information UL grant information, O is equal to the bit sequence of the obtained ACK/NACK response information Length, where is the maximum number of PDSCHs sent by the base station to the UE or the number of downlink subframes in which all the component carriers (or cells) are scheduled to feed back ACK/NACK response messages; as long as there is one PDSCH corresponding to 2 transmissions Block, TB _max = 2; otherwise, TB = 1 ; 73⁄4 _max ( _c ), _c = 0,l,...C - 1 represents the maximum value of the transport block in the component carrier (or cell) c, C is the UE configuration Number of component carriers (or cells); O _max indicates UE feedback

The maximum number of ACK/NACK response messages, O _max = K * TB _x , K indicates the number of downlink subframes in the configured uplink-downlink subframe ratio relationship, and the TB table is configured on the downlink component carrier (or cell) of the UE. The maximum number of bits of the correct error response message corresponding to the PDSCH, or O _max represents the maximum number of bits of the ACK/NACK response message that has been logically and operationally fed back;

(3) (equal to the length of the bit sequence of the obtained ACK/NACK response message;

(4) (equal to the TB corresponding to the ACK/NACK response information received by the UE and the number of ACK/NACK response information released by the semi-static persistent scheduling.

Further, if the ACK/NACK response message is transmitted on the PUSCH, the Dual RM is used. The method of encoding is performed, and the number of coded modulation symbols required for calculation is independently calculated. The number of bits O ¹ , O ² of the uplink control information to be transmitted during calculation is obtained by one of the following methods:

(1) When the UE transmits the PUSCH according to the uplink grant UL grant information, O ¹ = O ² = V _D ^U _A ^L ₁ , when the UE does not transmit the PUSCH according to the uplink grant UL grant information,

Wherein, C^O ² is the number of uplink control information bits to be transmitted when independently calculated, and / represents the maximum value of the total number of PDSCHs allocated to the ACK/NACK response information in the two RMs, where N represents Length of the bit sequence of the ACK/NACK response message;

(2)

, N represents the length of the bit sequence of the obtained ACK/NACK response information;

(3) O ¹ = "N/2], O ² = N - "N/2] , when the UE transmits the PUSCH according to the uplink grant UL grant information, N = , .| W or W = min ( TB 0 when the UE When the PUSCH is not transmitted according to the uplink grant UL grant information, N indicates the length of the bit sequence of the obtained ACK/NACK response information, and indicates the number of downlink subframes in which the feedback ACK/NACK response message is scheduled in all component carriers (or cells). Maximum value in ; as long as there is one PDSCH corresponding to 2 transport blocks, TB = 2; otherwise, TB =1; 73⁄4 _max ( _C ), _C = 0, l, ... C-1 represents component carrier (or cell) The maximum value of the transport block in C, where C is the number of configured component carriers (or cells);

C _max = K * 3⁄4 TB _x , K represents the number of downlink subframes in the configured uplink-downlink subframe ratio relationship, and the maximum bit of the correct error response message corresponding to the PDSCH configured on the downlink component carrier (or cell) of the TB table a number, or 0, indicating the maximum number of bits of the ACK/NACK response message that has been logically and operationally fed back;

(4) O ¹ indicates the number of TB/NACK response information corresponding to the TB received by the UE in one Reed-Muller code; O ² indicates that the TB corresponding to the ACK/NACK response information received by the UE is mapped in another Reed - The number in the Muller code. Further, the determining, according to the DAI in the uplink authorization information, is that when a plurality of uplink authorization information is sent to the UE, the value of the DAI in the uplink authorization information is the same.

Further, in step 306, the UE sends the ACK/NACK response information on the PUSCH to: the UE encodes the generated ACK/NACK bit sequence according to the corresponding coding manner, and obtains the coded according to the number of the modulated modulation symbols. The sequence is multiplexed with the data by channel interleaving and then transmitted on the PUSCH.

A user terminal provided by the present invention includes: an obtaining module, a calculating module, and a sending module, where the acquiring module is configured to acquire a bit sequence of ACK/NACK response information to be sent; and the calculating module is configured to calculate the ACK sent on the PUSCH. /NACK The number of coded modulation symbols required for the bit sequence of the response information; the transmitting module is configured to transmit the ACK/NACK response information on the PUSCH. The foregoing modules are all configured to implement the ACK/NACK response information sending method provided by the present invention, and the specific technical solutions of the foregoing methods may be embodied in the functions of the modules and the interaction relationship between the modules, where No longer.

Note: When the step 304 is not related to the step 302, the order of the two may be interchanged; the method for transmitting the ACK/NACK response information on the physical uplink shared channel according to the present invention effectively solves the carrier aggregation scenario. The problem that the ACK/NACK response message is sent on the PUSCH. DRAWINGS

1 is a schematic diagram of a frame structure in a prior art FDD system;

2 is a schematic diagram of a frame structure in a prior art TDD system;

3 is a schematic flow chart of a method for transmitting response information according to the present invention;

4 is a schematic diagram of Embodiment 1 of the present invention;

5 is a schematic diagram of determining an ACK/NACK bit sequence according to Embodiment 1 of the present invention; FIG. 6 is a schematic diagram of determining an ACK/NACK bit sequence according to Embodiment 2 of the present invention; FIG. 7 is a third embodiment of the present invention. A schematic diagram of determining an ACK/NACK bit sequence; FIG. 8 is a schematic diagram of determining an ACK/NACK bit sequence according to Embodiment 4 of Embodiment 2 of the present invention; FIG. 9 is a schematic diagram of determining an ACK/NACK bit sequence according to Embodiment 5 of Embodiment 2 of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

As shown in FIG. 4, in the TDD system, it is assumed that the base station configures 4 downlink component carriers (or cells) {DL CC#0, DL CC#1, DL CC#2, DL CC#3} for the UE, and both need The 2-bit ACK/NACK response information is fed back, and it is assumed that an uplink subframe needs to simultaneously feed back downlink subframes #n #n+1 and #n+2 - ACK/NACK response information of 3 downlink subframes; PUSCH The ACK/NACK response information that can be transmitted at most is 40 bits; the ACK/NACK response information is not encoded by the Dual RM code when transmitted on the PUSCH, and the PUSCH is transmitted according to the UL grant, and corresponds to only one transport block.

Step 402: The UE determines the ACK/NACK response information that needs to be fed back according to the number of downlink component carriers (or cells) configured by the base station, the configured uplink-downlink ratio, and the configured transmission mode of each downlink component carrier (or cell). Bit sequence. The terminal maps the corresponding ACK/NACK response information to the bit sequence according to the sub-frame of the pre-codeword stream, and then the component carrier (or cell), wherein the length of the bit sequence is 24;

Step 404: The UE calculates, according to the related information, the number of coding symbols required to send the ACK/NACK response information bit sequence, and calculates the number of coding symbols, (the value is determined according to the following manner:

(1) Since the transmitted PUSCH is performed according to the UL grant, when calculating the number of coded modulation symbols, 0 = V _AI or O = i *TB or O = min( *TB , M* TB _X ) or x=0

0 = V _D ^U _M ^L -∑TB _m c) , the UE calculates the required code modulator according to the length of the obtained bit sequence Number of numbers;

(2) (9=bit sequence length;

(3) (9=Number of transmitted blocks received;

Wherein, the total number of PDSCHs sent by the base station to the UE or the maximum number of downlink subframes in all component carriers (or cells) is indicated, when any PDSCH corresponds to 2 transport blocks, TB = ² ; otherwise, TB = 1 ; 73⁄4 = 0,1,. -1 indicates the maximum value of the transport block in the component carrier (or cell), that is, if any PDSCH in the component carrier (or cell) C corresponds to 2 transport blocks, TB _max (C) = 2 , otherwise TB _max (C) = l , M represents the number of downlink subframes in the ratio of the uplink and downlink subframes configured, N represents the number of downlink component carriers (or cells), and TB _x represents each configuration to the UE. The number of bits of the downlink component carrier (or cell) that needs to send ACK/NACK response information;

Step 406: The UE encodes the generated bit sequence of the ACK/NACK response information according to the corresponding coding manner, obtains the encoded sequence according to the number of the modulated modulation symbols, and multiplexes the data by channel interleaving, and then Sent on PUSCH.

Embodiment 2:

As shown in FIG. 5 to FIG. 9, in the TDD system, it is assumed that the base station configures four downlink component carriers (or cells) {DL CC#0, DL CC#1, DL CC#2, DL CC#3 }, for the UE, DL CC#0/l/3 needs to feed back 2 bits of ACK/NACK response information, DL CC#2 needs to feed back 1 bit of ACK/NACK response information, and assumes that an uplink subframe needs to simultaneously feed back downlink subframes# n, #n+ 1 and #n+2—the ACK/NACK response information of a total of three downlink subframes; the ACK/NACK response information that can be transmitted at most on the PUSCH is M bits and the base station and the UE agree that M=20; ACK/ When the NACK response information is transmitted on the PUSCH, it is encoded by the Dual RM code, and the PUSCH is transmitted according to the UL grant, and corresponds to only one transport block.

Step 602: The UE according to the number of downlink component carriers (or cells) configured by the base station, the configured uplink-downlink ratio, and the configured transmission mode of each downlink component carrier (or cell). Determining a bit sequence of ACK/NACK response information that needs to be fed back, since the ACK/NACK response information that can be transmitted at the PUSCH is 20 bits; the ACK/NACK bit sequence is obtained according to the following manner;

Manner 1: As shown in Figure 5, after logically ANDing the ACK/NACK response information corresponding to all PDSCHs containing 2 codeword streams, the obtained ACK/ is obtained according to the order of the sub-subcarriers (or cells). NACK response information is mapped into the corresponding bit sequence;

Manner 2: As shown in FIG. 6, where DL CC#0 is a primary component carrier (or primary cell), and DL CC#l/2/3 is a secondary component carrier (or cell), and the secondary component carrier (or cell) After performing logical AND operation on the ACK/NACK response information corresponding to the PDSCH of the 2 codeword streams, the obtained ACK/NACK response information is mapped to the corresponding bit sequence according to the order of the sub-subframe component carrier (or cell). ;

Mode 3: As shown in FIG. 7, it is assumed that DL CC#0 has the highest priority, and DL CC#3 has the lowest priority, because only the PDSCH including 2 codeword streams in the lowest priority DL CC3 needs to be corresponding. The logical AND operation of the ACK/NACK response information can make the information bits not exceed M, so the ACK/NACK response information corresponding to the PDSCH of the two codeword streams in the DL CC#3 is logically operated, according to the first subframe. The sequence of the post-component carrier (or cell) maps the obtained ACK/NACK response information into the corresponding bit sequence;

Manner 4: As shown in FIG. 8, it is only necessary to logically AND operate the ACK/NACK response information corresponding to the PDSCH of the 2 codeword streams in all component carriers (or cells) corresponding to the subframe #n. Not more than 20, all the ACK/NACK response information corresponding to the PDSCH including the 2 codeword streams in the subframe #n is logically ANDed, and the obtained ACK/ is obtained in the order of the sub-subframe component carrier (or cell). The NACK response information is mapped into the corresponding bit sequence. Method 5: As shown in FIG. 9, since only one PDSCH corresponding ACK/NACK response information needs to be logically operated, the information bit does not exceed 20, so according to the preamble The order of the post-frame component carriers (or cells) sorts all PDSCHs, in order from back to front. DL CC#3, the ACK/NACK response information corresponding to the PDSCH on the subframe #n+2 is logically ANDed, and the obtained ACK/NACK response information is mapped to the corresponding one in the order of the first subframe after the component carrier (or cell). In the bit sequence;

Step 604: The UE calculates, according to the related information, the number of coding symbols required to send the ACK/NACK response information bit sequence, and calculates the number of coding symbols:

If the ACK/NACK response information is transmitted on the PUSCH, the number of coded modulation symbols required for the calculation is jointly calculated, and the value of O can be determined according to one of the following ways:

(1) When the UE transmits the PUSCH according to the uplink grant UL grant information, 0 = 2, when the UE does not transmit the PUSCH according to the UL grant information, O is equal to the length of the bit sequence of the obtained ACK/NACK response information; Is the maximum value of the total number of PDSCHs allocated to the ACK/NACK response information in the two RMs;

(2) (equal to the length of the bit sequence of the obtained ACK/NACK response message;

(3) (equal to the TB corresponding to the ACK/NACK response information received by the UE and the number of ACK/NACK response information released by the semi-static continuous scheduling;

(4) When the UE transmits PUSCH according to the uplink grant UL grant information, 0 = V^, or

C = TB _max , or O = min( TB _max , O or 0 = d ra _max ( _c ); when the UE does not transmit the PUSCH according to the uplink grant information UL grant information, O is equal to the bit sequence of the obtained ACK/NACK response information The length of the PDSCH that is sent by the base station to the UE or the maximum number of downlink subframes in which the feedback ACK/NACK response message is scheduled in all component carriers (or cells); Transport block, TB _max =2; otherwise, TB =1; 73⁄4 _max ( _c ), _c = 0,l,...C-1 represents the maximum value of the transport block in the component carrier (or cell) c, C is the UE Number of configured component carriers (or cells); O _max indicates UE feedback

The maximum number of bits of the ACK/NACK response message, O _max =K* TB _x , where K is the number of downlink subframes in the configured uplink-downlink subframe ratio relationship, and the TB table is configured for each downlink component carrier of the UE (or The maximum error number of the correct error response message corresponding to the PDSCH on the cell, or O _max indicates the maximum number of bits of the ACK/NACK response message that is fed back through the logical AND operation; if the ACK/NACK response message is transmitted on the PUSCH, the calculation is performed. The number of coded modulation symbols required is calculated independently (the value can be determined according to one of the following ways:

(1) When the UE transmits the PUSCH according to the uplink grant UL grant information, O ¹ = O ² = / , when the UE does not transmit the PUSCH according to the uplink grant UL grant information,

(2)

(3) O ¹ = "N/2,, O ² = N - "N/2], when the UE transmits according to the uplink grant UL grant information

When PUSCH, N = , .| W or W = min ( TB 0 When the UE does not transmit the PUSCH according to the uplink grant UL grant information, N represents the length of the bit sequence of the obtained ACK/NACK response information, indicating all component carriers (or cell) the maximum of the number of downlink subframes in which the feedback ACK/NACK response message is scheduled; as long as one PDSCH corresponds to two transport blocks, TB = 2; otherwise, TB = 1; 73⁄4 _max ( _C ), _C = 0 l ... C-1 represents the maximum value of the transport block in the component carrier (or cell) c, and C is the number of component carriers (or cells),

(4) O ¹ indicates that the TB corresponding to the ACK/NACK response information received by the UE is mapped in a Reed - the number in the Muller code; 0 ² indicates the number of TB/NACK response information corresponding to the TB received by the UE in another Reed-Muller code.

Step 606: The UE encodes the generated ACK/NACK bit sequence according to a corresponding coding manner, obtains a coded sequence according to the number of coded modulation symbols, and multiplexes the data by channel interleaving, and then transmits the data on the PUSCH. .

In order to implement the above method embodiments, other embodiments of the present invention also provide a user terminal. Since the embodiments described below are for implementing the foregoing method embodiments, the modules in the user terminal are all designed to implement the foregoing method, and the modules in the user terminal can be unambiguously derived from the foregoing method. However, the present invention is not limited to the embodiments described below, and any apparatus and modules that can implement the above methods should be included in the scope of the present invention. Also, in the following description, the same contents as the foregoing methods are omitted here to save space.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by instructions to the associated hardware, which may be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Industrial scope

The ACK/NACK response information provided by the present invention is transmitted on a physical uplink shared channel. In a scenario of carrier aggregation, the UE first acquires a bit sequence of ACK/NACK response information to be transmitted, and then calculates the ACK to be sent on the PUSCH. /NACK The number of coded modulation symbols required for the bit sequence of the response information, and finally the ACK/NACK response information is transmitted on the PUSCH. The invention effectively solves the problem that the ACK/NACK response information is sent on the PUSCH in the carrier aggregation scenario.

Claims

Claim

A method for transmitting response information, the method comprising:

In the scenario of carrier aggregation, the user terminal UE acquires a bit sequence of ACK/NACK response information that needs to be sent;

The UE calculates the number of coded modulation symbols required to transmit the bit sequence of the ACK/NACK response information on the PUSCH;

The UE transmits the ACK/NACK response information on the PUSCH.

2. The method according to claim 1, wherein the method for the UE to acquire a bit sequence of ACK/NACK response information to be transmitted is:

The UE may, according to the number of downlink component carriers configured by the base station, the configured uplink-downlink subframe ratio, the configured transmission mode of each downlink component carrier, and the correct or incorrect ACK/NACK response information bits that can be transmitted on the physical uplink shared channel PUSCH. The number is used to determine the ACK/NACK response information that needs to be sent, and the ACK/NACK response information that needs to be transmitted is mapped into the bit sequence.

3. The method according to claim 1, wherein the method for the UE to acquire a bit sequence of ACK/NACK response information to be transmitted is:

The UE obtains a bit sequence of the ACK/NACK response information to be sent according to the feedback mode of the high layer configuration:

If the upper layer configuration sends the ACK/NACK response information in the manner of the format lb joint channel selection, the bit sequence of the ACK/NACK response information to be transmitted is determined according to the ACK/NACK information in the mapping table of the channel selection manner;

If the upper layer configuration sends the ACK/NACK response information in the manner of the format 3, the number of the downlink component carriers configured by the UE, the transmission mode configured for each downlink component carrier, the ratio of the uplink and downlink subframes, and the ACK that can be sent on the PUSCH. /NACK replies the number of information bits to determine the ACK/NACK response information that needs to be sent, and sends the ACK/NACK that needs to be sent. The response information is mapped into the bit sequence.

The method according to claim 2 or 3, wherein the method further comprises: when acquiring a bit sequence of ACK/NACK response information to be transmitted, if at most, a 40-bit ACK/NACK response can be sent on the PUSCH For information, the ACK/NACK response information to be transmitted is mapped into the bit sequence according to the order of the codeword stream, the component carrier, the subframe, or the order of the codeword stream, the subframe, and the component carrier.

The method according to claim 2 or 3, wherein the method further comprises: when acquiring a bit sequence of ACK/NACK response information to be transmitted, if at most, the M-bit agreed by the base station and the UE can be transmitted on the PUSCH ACK/NACK response information, and the total number of bits of the ACK/NACK response information that needs to be sent exceeds M bits, and logically combines ACK/NACK response information corresponding to all physical downlink shared channel PDSCHs including 2 codeword streams. After the operation, the logical and operational ACK/NACK response information is mapped into the corresponding bit sequence, where the value of M is {20, 21, 22, 23, 24, 25, 26}.

The method according to claim 2 or 3, wherein the method further comprises: when acquiring a bit sequence of ACK/NACK response information to be transmitted, if at most, the M-bit agreed by the base station and the UE can be transmitted on the PUSCH ACK/NACK response information, and the total number of bits of the ACK/NACK response information that needs to be sent exceeds M bits, and logically AND operations the two ACK/NACK response information corresponding to the PDSCH according to a preset method until ACK/NACK The total number of bits of the response message does not exceed M bits, and then the logical and operational ACK/NACK response information is mapped into the corresponding bit sequence, where the value of M is {20, 21, 22, 23, 24, 25 , 26}„

The method according to claim 6, wherein the preset method is one of the following methods: logically AND operation of ACK/NACK response information corresponding to a PDSCH of two codeword streams in all secondary component carriers; If the total number of bits of the ACK/NACK response message still exceeds M bits, the ACK/NACK corresponding to the PDSCH including the 2 codeword streams in the primary component carrier should be Answer information for logic and operation; or

According to the order of the component carrier priorities from low to high, the ACK/NACK response information corresponding to all PDSCHs of the 2 codeword streams in the component carrier is logically ANDed until the total number of bits of the ACK/NACK response information is not More than M; or

Performing logical AND operations on the ACK/NACK response information corresponding to the PDSCH of the two codeword streams in all component carriers corresponding to the subframe according to the sequence of the subframes until the total number of bits of the ACK/NACK response information does not exceed M So far; or

All PDSCHs are sorted according to the order of the pre-subframe post component carrier or the first component carrier post subframe, and the ACK/NACK response information corresponding to the PDSCH of the 2 codeword streams is successively arranged in the order from the back to the front or the back to the back. Perform logic and operations until the total information bits do not exceed M.

The method according to claim 2 or 3, wherein, when mapping the ACK/NACK response information into a bit sequence, the mapping method is one of the following methods:

Method 1: mapping according to a predefined component carrier sequence, mapping ACK/NACK response information of the same component carrier according to a subframe order or mapping according to a value of a downlink assignment index DAI in a downlink grant information DL assignment, semi-static The ACK/NACK response information released by the persistent scheduling is located at the front or the end of the ACK/NACK response information fed back by the component carrier in which it is located;

The pre-defined component carrier sequence is a high-level configuration, or the predefined component carrier sequence is a component carrier index sequence, or the first primary component carrier and the secondary component carrier;

The number of ACK/NACK response information fed back by each component carrier is determined by the configured number of downlink subframes and the transmission mode, or the number of configured downlink subframes and the transmission mode, and the value of the downlink allocation index in the uplink grant information UL grant. Determine

Method 2: mapping according to the sequence of subframes, and ACK/NACK response information on the same subframe is mapped according to a predefined component carrier sequence; The pre-defined component carrier sequence is a high-level configuration, or the predefined component carrier sequence is a component carrier index sequence, or the first primary component carrier and the secondary component carrier.

9. The method according to claim 1, wherein the method further comprises:

When the UE does not detect the PDSCH on the configured downlink component carrier, the corresponding response information is set to NACK;

When the base station configures that one of the two transport blocks corresponding to the PDSCH is not enabled and the ACK/NACK response information corresponding to the PDSCH is not logically operated, the codeword stream corresponding to the unenabled transport block The response information is set to NACK;

When the base station configures that one of the two transport blocks corresponding to the PDSCH is not enabled and sends the ACK/NACK response information corresponding to the PDSCH for logical AND operation, then the codeword stream corresponding to the unenabled transport block is The ACK/NACK response information is set to ACK, or the ACK/NACK response information corresponding to the PDSCH and the operation result are ACK/NACK response information corresponding to the enabled transport block.

10. The method according to claim 1, wherein the method for obtaining an ACK/NACK response information bit sequence to be transmitted is adapted to use the format 3 to send ACK/NACK response information on the PUCCH.

11. The method according to claim 1, wherein if the ACK/NACK response information is transmitted on the PUSCH without encoding in a dual Reed-Muller code Dual RM, the ACK is transmitted on the PUSCH. When the number of coded modulation symbols required for the bit sequence of the /NACK response message is set, the number of bits O of the uplink control information to be transmitted is obtained by one of the following methods: When the UE transmits the PUSCH according to the uplink grant UL grant information, 0 = V^ , or

C = TB _max , or O = min( TB _max , O or 0 = d ra _max ( _c ); when the UE does not transmit the PUSCH according to the uplink grant information UL grant information, O is equal to the bit sequence of the obtained ACK/NACK response information The length of the PDSCH sent by the base station to the UE or the number of downlink subframes in which the feedback ACK/NACK response message is scheduled in all component carriers Maximum value in ; as long as there is one PDSCH corresponding to 2 transport blocks, TB = ² ; otherwise, TB 1; 73⁄4 _max ( _c ), _c = 0 l ... Cl represents the maximum value of the transport block in component carrier c, C The number of component carriers configured for the UE; O _max represents the maximum number of bits that the UE feeds back the ACK/NACK response message,

C _max = K * 3⁄4 TB _x , K represents the number of downlink subframes in the configured uplink-downlink subframe ratio relationship, and the maximum number of correct error response messages corresponding to the PDSCH on the downlink component carrier configured in the TB table, or 0 indicates the maximum number of bits of the ACK/NACK response message that has been logically and operationally fed back; or,

(equal to the length of the obtained bit sequence; or,

(Equivalent to the TB received by the UE corresponding to the ACK/NACK response information and the number of ACK/NACK response information released by the semi-static persistent scheduling.

12. The method according to claim 1, wherein, if the ACK/NACK response information is transmitted on the PUSCH, the method is performed by using a Dual RM, and the number of coded modulation symbols required for the calculation is jointly calculated. The number of bits O of the uplink control information to be sent is obtained by one of the following methods:

When the UE transmits the PUSCH according to the uplink grant UL grant information, o = 2 * V, when the UE does not transmit the PUSCH according to the UL grant information, O is equal to the length of the bit sequence of the obtained ACK/NACK response information; 3⁄4^ indicates the allocation The maximum number of PDSCHs corresponding to the ACK/NACK response information in the two RMs; or,

When the UE transmits PUSCH according to the uplink grant UL grant information, 0 = V^, or

C = TB _max , or O = min( TB _max , O or 0 = d ra _max ( _c ); when the UE does not transmit the PUSCH according to the uplink grant information UL grant information, O is equal to the bit sequence of the obtained ACK/NACK response information The length of the PDSCH that is sent by the base station to the UE or the maximum number of downlink subframes in which the feedback ACK/NACK response message is scheduled in all component carriers; as long as one PDSCH corresponds to two transport blocks, TB = ² ; otherwise, TB 1; 73⁄4 _max ( _C ), _C = 0 l ... C - l represents the maximum value of the transport block in the component carrier C, C is the number of component carriers configured by the UE; O _max represents the maximum of the ACK/NACK response message fed back by the UE Number of bits,

O is equal to the length of the bit sequence of the obtained ACK/NACK response message; or,

13. The method according to claim 1, wherein if the ACK/NACK response message is

When transmitting on the PUSCH, the code is coded by the Dual RM, and the number of coded modulation symbols required for the calculation is independently calculated. The number of bits of the uplink control information to be transmitted when calculating C^O ^{2 is} obtained by one of the following methods:

When the UE transmits the PUSCH according to the uplink grant UL grant information, O ¹ = O ² = / , when the UE does not transmit the PUSCH according to the uplink grant UL grant information,

Wherein, C^O ² is the number of uplink control information bits to be transmitted when independently calculated, and / represents the maximum value of the total number of PDSCHs allocated to the ACK/NACK response information in the two RMs, where N represents Length of the bit sequence of the ACK/NACK response message; or,

, N represents the length of the bit sequence of the obtained ACK/NACK response information; or,

When the UE transmits according to the uplink grant UL grant information

When PUSCH, N = , .| W or W = min ( TB 0 When the UE does not transmit the PUSCH according to the uplink grant UL grant information, N indicates the obtained ACK/NACK response message. The length of the bit sequence of the interest, ^ represents the maximum of the number of downlink subframes in the component feedback ACK/NACK response message in all component carriers; as long as one PDSCH corresponds to 2 transport blocks, TB _max = 2; otherwise, the TB leg = 1 ; 73⁄4 _max ( _C ), _C = 0, l, ... C-1 represents the maximum value of the transport block in component carrier C, C is the number of component carriers configured by the UE;

The number of downlink subframes in the downlink subframe ratio relationship, and the maximum number of correct error response messages corresponding to the PDSCH configured on the downlink component carrier of the UE in the TB table, or 0 indicates that the ACK/NACK response message is logically AND The maximum number of bits of operation feedback; or,

O ¹ represents the number of TB/NACK response information corresponding to the TB received by the UE in a Reed-Muller code; 0 ² indicates that the TB corresponding to the ACK/NACK response information received by the UE is mapped in another Reed-Muller The number in the code.

The method according to claim 11, 12 or 13, wherein the determining is based on the DAI in the uplink grant information, wherein when there are multiple uplink grant information to be sent to the UE, the value of the DAI in the uplink grant information is the same.

The method according to claim 1, wherein the method for the UE to send the ACK/NACK response information on the PUSCH is:

The UE encodes the generated bit sequence of the ACK/NACK response information according to the corresponding coding manner, obtains the encoded sequence according to the number of the modulated modulation symbols, multiplexes the data by channel interleaving, and then transmits the data on the PUSCH. .

16. A user terminal, the user terminal comprising:

An obtaining module, configured to obtain a bit sequence of ACK/NACK response information to be sent in a scenario of carrier aggregation;

a calculation module, configured to calculate a number of coded modulation symbols required to transmit a bit sequence of the ACK/NACK response information on the PUSCH;