KR20150089811A - Method and apparatus of uci transmission in wireless communication system supporting uplink mimo - Google Patents

Abstract

The present invention relates to a method for transmitting data and uplink control information through two codewords in PUSCH. A plurality of Q′cw, which represents the number of modulation symbols coded with respect to the uplink control information for each codeword, is calculated, channel coding for the uplink control information is performed independently for each codeword based on the plurality of Q′cw and then a vector sequence is generated, the uplink control information is controlled to be mapped in a resource area for the PUSCH based on the vector sequence wherein the uplink control information is either HARQ-ACK information or RI information. According to the present invention, UCI transmission can be performed more efficiently in a wireless communication system that supports MIMO. In addition, a spectral efficiency can be improved by applying different coding rates for respective codewords or layers, or by transmitting uplink control information only in CW for a selected specific transport block.

Description

Technical Field [0001] The present invention relates to a UCI transmission method and a UCI transmission method in a wireless communication system supporting uplink MIMO,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to wireless communication, and more particularly, to a method and apparatus for transmitting uplink control information (UCI) in a wireless communication system supporting uplink MIMO (Mulitple Input Multiple Output).

A MIMO (Multiple Input Multiple Output) technique is a technique that uses multiple antennas in a transmitter and / or a receiver in a wireless communication system and combines advanced signal processing techniques to improve transmission quality. A receiver can acquire reception diversity by using a plurality of reception antennas, and the transmitter can greatly improve the SNR (Signal to Noise Ratio) of the receiver through beamforming using a plurality of transmission antennas. If both the transmitter and the receiver have multiple antennas, a spatial multiplexing scheme may be applied to increase the data transmission rate.

There are various control information for smoothly supporting downlink and uplink transmissions in a wireless communication system. Of these, uplink control information includes scheduling request (SR), acknowledgment (ACK / NACK) for HARQ (Hybrid ARQ) A non-acknowledgment signal, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and the like.

The uplink control information can generally be transmitted through a physical uplink control channel (PUCCH). However, if there is user data to be transmitted in the uplink, the uplink control information may be multiplexed together with the user data and transmitted through a physical uplink shared channel (PUSCH). In this case, the uplink control information may be mapped on the basis of a certain reference to peripheral resources of a Demodulation Reference Signal (DMRS) used for channel estimation for coherent demodulation of the uplink received signal, . This is because the uplink control information is relatively important information as compared with the user data and the reliability of the channel estimation is high in the surrounding resources of the DMRS.

Meanwhile, in recent years, overhead reduction schemes have been considered for improving the small cell, and in particular, a scheme for reducing the overhead of the DMRS for improving the spectral efficiency of the uplink has been considered. Accordingly, it is necessary to consider a change in the transmission method of the uplink control information, and a new uplink control information transmission method different from the conventional one is required.

It is a technical object of the present invention to provide a UCI transmission method and apparatus.

It is another object of the present invention to provide a UCI transmission method and apparatus in a wireless communication system supporting MIMO.

Another aspect of the present invention is to provide a method and apparatus for transmitting UCI through a multiple transport block (TB).

Another aspect of the present invention is to provide a method and apparatus for transmitting UCI over a PUSCH in a wireless communication system supporting MIMO.

It is another object of the present invention to provide a parameter control method and apparatus for UCI mapping.

According to an aspect of the present invention, in a wireless communication system supporting Multiple Input Multiple Output (MIMO) transmission, data and uplink control information are transmitted through two codewords to a physical uplink shared channel (PUSCH) ). ≪ / RTI > The user terminal independently of each code word to each of the code words by the coded modulation symbols on the uplink control information (coded modulation symbol) control coding rate block for computing _Q'cw, which is the number of, based on said _Q'cw A channel coding unit for performing channel coding on the uplink control information and generating a vector sequence, and a channel interleaver for mapping the uplink control information to a resource region for the PUSCH based on the vector sequence Wherein the uplink control information is HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information.

According to another aspect of the present invention, there is provided a terminal for transmitting data and uplink control information on a PUSCH through two codewords in a wireless communication system supporting MIMO transmission. The terminal includes a code word selection unit for selecting one code word for transmission of the uplink control information from the two code words, a coded modulation symbol for the uplink control information for the selected code word, a channel coding unit for performing channel coding on the uplink control information based on the Q 'and generating a vector sequence, and a channel coding unit for performing channel coding on the basis of the vector sequence And a channel interleaver for mapping the uplink control information to a resource region for the PUSCH, wherein the uplink control information is HARQ-ACK information or RI information.

According to another aspect of the present invention, there is provided a method for transmitting data and uplink control information on a PUSCH through two codewords performed by a mobile station in a wireless communication system supporting MIMO transmission. The method according to the uplink control information independently by each code word in steps, based on said _Q'cw calculating _Q'cw, which is the number of the coded modulation symbols for each codeword by the uplink control information, the Channel coding and generating a vector sequence; and controlling the uplink control information to be mapped to a resource region for the PUSCH based on the vector sequence, wherein the uplink control information includes HARQ-ACK Information or RI information.

According to another aspect of the present invention, there is provided a method for transmitting data and uplink control information on a PUSCH through two codewords performed by a mobile station in a wireless communication system supporting MIMO transmission. The method includes selecting one codeword for transmission of the uplink control information from among the two codewords, selecting a codeword for transmission of the uplink control information from the codeword Q 'indicating the number of coded modulation symbols for the uplink control information for the selected codeword, , Performing channel coding on the uplink control information based on the Q 'and generating a vector sequence, and transmitting the uplink control information to a resource region for the PUSCH based on the vector sequence Wherein the uplink control information is HARQ-ACK information or RI information.

According to the present invention, in a wireless communication system supporting MIMO, UCI transmission can be performed more efficiently.

According to the present invention, spectral efficiency can be improved by applying a different coding rate for each layer or for each CW (cordwod).

Also, according to the present invention, the uplink control information can be transmitted only on the CW for the selected specific transport block, thereby improving the spectral efficiency.

1 shows a wireless communication system to which the present invention is applied.
2 shows a schematic structure of a physical layer used in a wireless communication system to which the present invention is applied.
FIG. 3 shows a structure of an uplink / downlink subframe used in a wireless communication system to which the present invention is applied.
4 illustrates a PUSCH channel structure according to an exemplary embodiment of the present invention. 4 shows a PUSCH channel structure in a subframe structure in the case of a normal CP.
5 shows an example of a UL-SCH and UCI processing structure according to the present invention.
6 is an example of the processing structure of UL-SCH and UCI when supporting MIMO transmission.
FIG. 7 shows an example in which resource UMI is mapped to a PUSCH region of a subframe through a process as shown in FIGS. 5 and 6. FIG.
Figures 8-10 are examples of DMRS mapping for overhead reduction.
11 shows an example of a UL processing structure for two TBs according to the present invention.
12 shows a procedure for obtaining Q 'for UCI according to an example of the method 1 of the present invention.
13 shows a procedure for obtaining Q 'for UCI according to another example of method 1 of the present invention.
14 shows an example of a channel coding method according to the method 1 of the present invention.
15 shows a layer replication method according to the method 2 of the present invention.
16 shows an example of a code word selection method according to the method 2-3 of the present invention.
17 is a flowchart illustrating a method of transmitting data and uplink control information on a PUSCH through two codewords according to an exemplary embodiment of the present invention.
18 is an example of a flowchart illustrating a method of transmitting data and uplink control information on a PUSCH through two codewords according to another example of the present invention.
19 is an example of a block diagram illustrating a terminal according to the present invention.

Hereinafter, some embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear.

In addition, the present invention will be described with respect to a wireless communication network. The work performed in the wireless communication network may be performed in a process of controlling a network and transmitting data by a system (e.g., a base station) Work can be done at a terminal connected to the network.

1 shows a wireless communication system to which the present invention is applied.

Referring to FIG. 1, a wireless communication system 10 is widely deployed to provide various communication services such as voice, packet data, and the like. The wireless communication system 10 includes at least one base station 11 (evolved-NodeB, eNB). Each base station 11 provides communication services to specific cells (15a, 15b, 15c). The cell may again be divided into multiple regions (referred to as sectors).

A user equipment (UE) 12 may be fixed or mobile and may be a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, (personal digital assistant), a wireless modem, a handheld device, and the like. The base station 11 may be referred to by other terms such as a base station (BS), a base transceiver system (BTS), an access point, a femto base station, a home node B, and a relay. Cells are meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, and femtocell.

Hereinafter, downlink (DL) refers to communication from the base station 11 to the terminal 12, and uplink (UL) refers to communication from the terminal 12 to the base station 11. In the downlink, the transmitter may be part of the base station 11, and the receiver may be part of the terminal 12. In the uplink, the transmitter may be part of the terminal 12, and the receiver may be part of the base station 11. There are no restrictions on multiple access schemes applied to wireless communication systems. (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA , OFDM-CDMA, and the like. A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

2 shows a schematic structure of a physical layer used in a wireless communication system to which the present invention is applied.

Referring to FIG. 2, one radio frame includes ten subframes, and one subframe includes two consecutive slots.

There are several physical channels used in the physical layer. As a downlink physical channel, a Physical Downlink Control Channel (PDCCH) informs a terminal of resource allocation of a paging channel (PCH), a downlink shared channel (DL-SCH), and Hybrid Automatic Repeat Request (HARQ) information related to a DL-SCH. The PDCCH may carry an uplink grant informing the UE of the resource allocation of the uplink transmission. A DL-SCH is mapped to a PDSCH (Physical Downlink Shared Channel). The Physical Control Format Indicator Channel (PCFICH) informs the UE of the number of OFDM symbols used for PDCCHs and is transmitted every subframe. The Physical Hybrid ARQ Indicator Channel (PHICH) is a downlink channel that carries an HARQ (Hybrid Automatic Repeat reQuest) ACK (Acknowledgment) / NACK (Non-acknowledgment) signal, which is a response of an uplink transmission. The HARQ ACK / NACK signal may be referred to as an HARQ-ACK signal.

As a physical uplink channel (PUCCH), a physical uplink control channel (PUCCH) includes HARQ-ACK, a response of downlink transmission, channel status information (CSI) indicating a downlink channel status, a precoding matrix index (PTI), a precoding type indicator (PTI), a rank indicator (RI), and the like. The Physical Uplink Shared Channel (PUSCH) carries an Uplink Shared Channel (UL-SCH). A Physical Random Access Channel (PRACH) carries a random access preamble.

The CQI provides information on the link adaptive parameters that the UE can support for a given time. The CQI may indicate a data rate that can be supported by the downlink channel in consideration of the characteristics of the terminal receiver and the signal to interference plus noise ratio (SINR). The base station can determine the modulation (QPSK, 16-QAM, 64-QAM, etc.) and the coding rate to be applied to the downlink channel using the CQI. The CQI can be generated in several ways. For example, a channel state can be directly quantized and fed back, a signal-to-interference plus noise ratio (SINR) can be calculated and fed back, and a MCS (Modulation Coding Scheme) have. When the CQI is generated based on the MCS, the MCS includes the modulation scheme, the coding scheme, the coding rate, and the like.

The PMI provides information on the precoding matrix in the codebook-based precoding. PMI is associated with multiple-input multiple-output (MIMO). The feedback of PMI in MIMO is called closed loop MIMO (CL MIMO).

The RI is information on a rank recommended by the UE (i.e., the number of layers). That is, RI represents the number of independent streams used for spatial multiplexing. The RI is fed back only when the terminal operates in the MIMO mode using spatial multiplexing. RI is always associated with one or more CQI feedback. That is, the feedback CQI is calculated assuming a specific RI value. Since the rank of the channel generally changes slower than the CQI, the RI is fed back a number of times less than the CQI. The RI transmission period may be a multiple of the CQI / PMI transmission period. RI is given for the entire system band and frequency selective RI feedback is not supported.

Meanwhile, the uplink data transmitted on the PUSCH may be a transport block that is a data block for a UL-SCH transmitted during a TTI (Transmission Time Interval). The transport block may include user data. Alternatively, the uplink data may be multiplexed data. The multiplexed data may be a multiplexed transport block for UL-SCH and UL control information. That is, if there is user data to be transmitted in the uplink, the uplink control information may be multiplexed together with the user data and transmitted through the PUSCH.

FIG. 3 shows a structure of an uplink / downlink subframe used in a wireless communication system to which the present invention is applied.

Referring to FIG. 3, in the case of a wireless system using Orthogonal Frequency Division Multiple Access (OFDMA) in the downlink, the symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol. On the other hand, in a radio system using a single carrier transmission scheme based on a Discrete Fourier Transform-Spread OFDM (DFTS-OFDM) scheme in the uplink, the symbol may be a DFTS-OFDM symbol. The single carrier transmission scheme based on DFTS-OFDM can be called SC-FDMA (Single Carrier Frequency Division Multiple Access), and the DFTS-OFDM symbol can be called SC-FDMA symbol.

On the other hand, the representation of the symbol period of the time domain is not limited by the multiple access scheme or the name. For example, in a time domain, a plurality of symbols may be a single-carrier-frequency division multiple access (SC-FDMA) symbol, a symbol period, etc. in addition to an OFDM symbol.

The number of OFDM symbols or SC-FDMA symbols included in one slot may vary according to the length of CP (Cyclic Prefix). For example, one slot may include seven symbols in the case of a normal CP, and one slot may include six symbols in the case of an extended CP.

One slot includes a plurality of subcarriers in the frequency domain and includes seven OFDM symbols or SC-FDMA symbols in the time domain. A resource block (RB) is a resource allocation unit. If a resource block includes 12 subcarriers in the frequency domain, one resource block may include 7 * 12 resource elements (REs). The resource block may be referred to as a PRB (Physical Resource Block).

The resource element represents the smallest frequency-time unit to which the modulation symbol of the data channel or the modulation symbol of the control channel is mapped. If there are M subcarriers on one OFDM symbol and one slot includes N OFDM symbols, one slot includes M * N resource elements. Similarly, if there are M subcarriers on one SC-FDMA symbol and one slot includes N SC-FDMA symbols, one slot includes M * N resource elements.

4 illustrates a PUSCH channel structure according to an exemplary embodiment of the present invention. 4 shows a PUSCH channel structure in a subframe structure in the case of a normal CP.

Referring to FIG. 4, one subframe includes two consecutive slots. Two consecutive slots may be referred to as even and odd slots in order (starting from zero). In case of a normal CP, one slot includes 7 SC-FDMA symbols. That is, one subframe includes 14 SC-FDMA symbols. The 7 SC-FDMA symbols of each slot can be indexed from 0 to 6 symbols. In this case, a Demodulation Reference Signal (DMRS) can be transmitted through SC-FDMA symbols having symbol indexes of even-numbered slots and odd-numbered slots. The DMRS is used for channel estimation for coherent demodulation of the uplink received signal. The uplink data can be transmitted through the remaining SC-FDMA symbols except for the SC-FDMA symbol through which the DMRS is transmitted. Resource elements (REs) of M _PUSCH * N ^RB _sc are used for PUSCH transmission for each SC-FDMA symbol. Where M _PUSCH denotes the number of resource blocks (RBs) allocated for PUSCH transmission, and N ^RB _sc denotes a resource block size in the frequency domain and is expressed by the number of sub-carriers. On the other hand, the last SC-FDMA symbol (symbol index 6 in the odd slot) of the subframe may be used for SRS (Sounding Reference Signal) transmission in some cases. The DMRS is used for uplink channel estimation for coherent demodulation of uplink physical channels (PUSCH or PUCCH), and is transmitted in the same frequency band as the corresponding physical channel, whereas SRS is used for the uplink channel quality The uplink signal is transmitted in the uplink. For example, the SRS may be transmitted at a periodic interval of two subframes in a short time, or in a subframe of 16 long ones.

5 shows an example of a UL-SCH and UCI processing structure according to the present invention. Data can arrive at the coding unit in the form of a maximum of two transport blocks for every TTI, and a coding step as shown in FIG. 5 can be performed for each transport block. The coding unit may be part of the terminal.

Referring to FIG. 5, data bits a ₀ , a ₁ , ..., a _{A -1} are given in the form of one transport block for each TTI. First, the data bit block transfer _{a 0, a 1, ...,} CRC having a length L in a _{A -1} (Cyclic Redundancy Check) parity bits _{p 0, p 1, ...,} p L -1 is added, the added CRC bits _{b 0, b 1, ...,} b B -1 is generated (S500). Here, subscripts B, A, and L have the relationship of B = A + L. The relation between a _k and b _k can be expressed as follows.

CRC portion bits _{b 0, b 1, ...,} b B -1 of the code block is broken down into (code block) unit, a code block CRC parity bits are re-added (S510). The bit sequence output after code block segmentation is called c _r0 , c _r1 , ..., c _{r ( Kr -1)} . Here, when the total number of code blocks is C, r is a code block number and K _r is a number of bits for a code block number r.

로 나타내며, D_r은 출력 스트림당 인코딩된 비트들의 갯수, i는 인코더 출력 비트 스트림의 인덱스이다.The bit sequence for a given code block is channel coded (S520). The encoded bits

D _r is the number of encoded bits per output stream, and i is the index of the encoder output bit stream.

The encoded bits to generate a rate matching (matching rate) is carried out (S530), the code block concatenation (concatenation) is performed (S540), the bit sequence _{f 0, f 1, ...,} f G -1. The rate matching means that the amount of data to be transmitted is matched with the maximum transmission amount of the actual channel for each transmission unit time, for example, TTI. Where G denotes the total number of encoded bits used for transmission except for the bits used for control information transmission when the control information is multiplexed on the PUSCH.

On the other hand, control information (uplink control information) can be multiplexed with data (uplink data). The data and control information may use different coding rates by assigning different numbers of coded symbols for the transmission. The control information (control data) arrives at the coding unit in the form of CQI / PMI (CQI and / or PMI), HARQ-ACK and RI and independent channel coding is performed for each of CQI / PMI, HARQ- .

이 생성된다(S550). 여기서 N_L은 해당 전송 블록이 맵핑되는 레이어의 수이다. O ₀ , o ₁ , ..., o _{o -1} (subscript o is the number of bits of CQI / PMI) with respect to CQI / PMI is channel-

(S550). Where N _L is the number of layers to which the transport block is mapped.

는 채널 코딩이 수행되어 벡터 시퀀스

이 생성된다(S560).

(여기서 i=0,...Q´_RI-1)는 길이 (Q_m·N_L)의 열(column) 벡터들이다. 그리고 Q´_RI=Q_RI/Q_m이다. Q_RI는 모든 인코딩된 RI 블록들을 위한 코딩된 비트들의 전체 수를 나타낸다. Q_m은 PUSCH의 변조 오더(modulation order)를 나타낸다. 예를 들어, Q_m은 QPSK의 경우 2, 16QAM의 경우 4, 64QAM의 경우 6일 수 있다(Q_m is equal to 2 for QPSK, 4 for 16QAM, 6 for 64QAM).About RI

Channel coding is performed so that the vector sequence < RTI ID = 0.0 >

(S560).

(Where _{i = 0, ... Q'RI -1} ) is the length (Q _m · _L N) of the column (column) are vectors. And Q ' _RI = Q _RI / Q _m . Q _RI represents the total number of coded bits for all encoded RI blocks. Q _m represents the modulation order of the PUSCH. For example, Q _m may be 2 for QPSK, 4 for 16 QAM, or 6 for 64 QAM (Q _m is equal to 2 for QPSK, 4 for 16 QAM, and 6 for 64 QAM).

는 채널 코딩이 수행되어 벡터 시퀀스

이 생성된다(S570).

(여기서 i=0,...Q´_ACK-1)는 길이 (Q_m·N_L)의 열(column) 벡터들이다. 그리고 Q´_ACK=Q_ACK/Q_m이다. Q_ACK는 모든 인코딩된 HARQ-ACK 블록들을 위한 코딩된 비트들의 전체 수를 나타낸다.Similarly, regarding HARQ-ACK

Channel coding is performed so that the vector sequence < RTI ID = 0.0 >

(S570).

(Where i = 0, ... Q ' _ACK -1) are column vectors of length (Q _m N _L ). And Q ' _ACK = Q _ACK / Q _m . Q _ACK represents the total number of coded bits for all encoded HARQ-ACK blocks.

는 다중화된 벡터 시퀀스

로 다중화된다(S580). 여기서 H=(G+N_L·Q_CQI)이고, H´=H/(N_L·Q_m)이다. H는 해당 전송 블록의 UL-SCH 데이터(상향링크 데이터) 및 CQI/PMI 정보를 위하여 할당된 코딩된(coded) 비트들의 전체 수를 나타낸다.

(여기서 i=0,...,H´-1)는 길이 (Q_m·N_L)의 열(column) 벡터들이다.Bit sequences of the _first and the CQI / PMI _- the bit sequences of the generated data _{f 0, f 1, ...,} f G

Lt; RTI ID = 0.0 >

(S580). Where H = (G + N _L Q _CQI ) and H '= H / (N _L Q _m ). H denotes the total number of coded bits allocated for UL-SCH data (uplink data) and CQI / PMI information of the transport block.

(Where i = 0, ..., H'- 1) is the length (Q _m · _L N) of the column (column) are vectors.

가 배치되고, 이후로 데이터의 비트 시퀀스 f₀, f₁,..., f_{G -1}가 배치될 수 있다. 즉, H=G+Q_CQI일때, [

]=[

, f₀, f₁,..., f_{G -1}]와 같이 구성될 수 있다.When multiplexing, first the bit sequence of CQI / PMI

And then the bit sequence f ₀ , f ₁ , ..., f _{G -1} of the data can be arranged. That is, when H = G + Q _CQI ,

] = [

, f ₀ , f ₁ , ..., f _{G -1} ].

는 채널 인터리버(channel interleaver)에 의해 비트열로 구성된 비트 시퀀스

로 맵핑된다(S590). 또한, RI 및/또는 HARQ-ACK의 벡터 시퀀스는 채널 인터리버에 의해 상기 비트 시퀀스

로 맵핑될 수 있다. 채널 인터리버는 인터리빙 행렬을 기반으로, HARQ-ACK 정보 맵핑 방법 및 RI 정보 맵핑 방법을 결정하고, 감소된 DMRS의 맵핑을 고려하여 상기 HARQ-ACK 정보 및 상기 RI 정보가 PUSCH 영역의 특정 위치에 맵핑되도록 제어할 수 있다. 예를 들어, 채널 인터리버는 감소된 DMRS가 맵핑되는 SC-FDMA 심볼의 주변 SC-FDMA 심볼들에 여러 방법에 따라 상기 HARQ-ACK 정보 및 RI 정보가 맵핑되도록 제어할 수 있다.Multiplexed vector sequence

A bit sequence composed of a bit string by a channel interleaver

(S590). In addition, the vector sequence of RI and / or HARQ-ACK is transmitted by the channel interleaver to the bit sequence

Lt; / RTI > The channel interleaver determines the HARQ-ACK information mapping method and the RI information mapping method based on the interleaving matrix, and maps the HARQ-ACK information and the RI information to specific positions of the PUSCH area in consideration of the reduced DMRS mapping. Can be controlled. For example, the channel interleaver may control the HARQ-ACK information and the RI information to be mapped to the neighboring SC-FDMA symbols of the SC-FDMA symbol to which the reduced DMRS is mapped according to various methods.

는 스크램블링, 변조(modulation), 코드워드-레이어 맵핑(codeword-to-layer mapping) 및 프리코딩(precoding) 등의 절차를 거친 후 PUSCH 영역에 자원 맵핑(resource mapping)된다.The bit sequence

Is subjected to resource mapping in a PUSCH region after scrambling, modulation, codeword-to-layer mapping, and precoding.

Meanwhile, in S560 and S570, when channel coding RI information and HARQ-ACK information, Q 'must be determined first. Q 'represents the number of coded modulation symbols per layer. The coding unit can determine Q 'based on a Modulation Coding Scheme (MCS) level applied to the PUSCH, and can adjust a coding rate for RI and HARQ-ACK based on the Q'.

If only one transport block is transmitted on the PUSCH (i.e., in the case of a single layer transmission), Q 'can be calculated as shown in Equation 2 below.

Where O (alpabet O) is the number of RI bits or HARQ-ACK bits. M ^PUSCH _SC is the bandwidth scheduled for PUSCH transmission in the current subframe for the transport block, expressed as the number of subcarriers. N ^{PUSCH - initial} _Symb is the number of SC-FDMA symbols per subframe for the initial PUSCH transmission for the same transport block. N ^{PUSCH -initial} _Symb can be calculated as Equation (3).

Here, N _SRS has a value of 1 or 0. For example, if the UE transmits a PUSCH and an SRS in the same subframe for initial transmission, or if a PUSCH resource allocation for an initial transmission is a cell-specific SRS subframe and a bandwidth configuration, specific SRS subframe, or if the subframe for initial transmission is a UE-specific Type-1 SRS subframe, or if the subframe for initial transmission is a UE- N _SRS may be 1 if multiple Timing Advance Groups (TAGs) are configured and N _SRS may be 0 in the remaining cases.

In Equation (2), M ^{PUSCH - initial} _sc , C, and K _r can be obtained from the initial PDCCH (or EPDCCH (enhanced-PDCCH)) for the same transport block. If there is no initial PDCCH (or EDPCCH) of the downlink control information (DCI) format 0 for the same transport block, M ^{PUSCH - initial} _sc , C, and K _r may be determined according to: For example, M ^{PUSCH - initial} _sc , C, and K _r are the most recent semi-persistent scheduling assigned PDCCH (or EPDCCH) when the same transport block is semi-persistent scheduled. ). ≪ / RTI > In another example, M ^{PUSCH - initial} _sc , C, and K _r may be determined from the random access response for the same transport block when the PUSCH is initiated by a random access response grant. [beta] ^PUSCH _offset represents a control information MCS offset for coding rate adjustment and can be set through RRC (Radio Resource Control) signaling. In this case, the? ^PUSCH _offset may be set independently of HARQ-ACK information, RI information, and CQI / PMI information.

The modulation sequence symbols generated after the channel interleaving are subjected to resource mapping in the PUSCH region after a procedure such as scrambling, modulation, codeword-to-layer mapping, and precoding, do.

On the other hand, when the wireless communication system supports the MIMO transmission, the UL-SCH and the UCI can be processed through the following procedure.

6 is an example of the processing structure of UL-SCH and UCI when supporting MIMO transmission. 6 shows a case where UL-SCH data and UCI are transmitted through two codewords.

Referring to FIG. 6, CRC parity bits are added to TBs (Transport Blocks) # 1 and TB # 2, and then divided into code blocks. CRC parity bits are added in units of code blocks. The bit sequence after code block segmentation is channel coded. Channel coding is performed and the encoded bits are subjected to rate matching and code block concatenation is performed to generate a data bit sequence. In this case, the data bit sequence for TB # 1 may be referred to as data CW (codeword) 1, and the data bit sequence for TB # 2 may be referred to as data CW 2. The above process has already been described with reference to FIG. 6, the difference from FIG. 5 is that information such as uplink control information (UCI), i.e., CQI / PMI, RI, HARQ-ACK, etc., is transmitted through a plurality of codewords. In this case, the HARQ-ACK information may be repetituted with the same information and channel-coded through different codewords CW 1 and CW 2. This is also true for RI information. However, the CQI / PMI information is channel-coded, and any one of the different codewords may be selected and multiplexed with the data on the codeword. A codeword may include one or more layers.

The multiplexed data and the CQI / PMI information are input to the channel interleaver in the form of a multiplexed vector sequence. On the other hand, the HARQ-ACK information and the RI information each channel-coded replicated for each codeword layer are input to the channel interleaver in the form of a vector sequence. In this case, when a plurality of layers are mapped to one codeword, the output of the channel coding of each of the HARQ-ACK information and the RI information may be input to the channel interleaver after layer replication is performed. Layer duplication means that the channel coding output of each of HARQ-ACK information and RI information is duplicated by the number N _{L of} layers to which the corresponding transport block is mapped through a specific process.

The output of the channel interleaver is scrambled and modulated. Thereafter, a codeword-to-layer mapping and precoding are performed on the plurality of codewords, and a DFTS-FDMA signal is generated and transmitted to each transmit antenna port of the multiple transmit antennas. The DFTS-OFDM signal may be referred to as an SC-FDMA signal.

If two transport blocks are transmitted on the PUSCH, Q 'for channel coding of the HARQ-ACK information and RI information can be calculated as shown in Equation (4).

이고, 여기서 Q´m은 Q¹ _m 및 Q² _m의 최소값이며, 여기서 Q^x _m(x={1,2})는 전송 블록 x의 변조 오더를 나타낸다. 만약 O(alpabet O)>11인 경우 Q´_min은

이고, 여기서,

이고,

이다. Q´_temp는 다음 수학식 5와 같이 계산될 수 있다.Here, _Q'min can be determined in accordance with the O (alpabet O) representing the number of RI bits or bit HARQ-ACK. If the O (alpabet O) ≤2 _Q'min is zero. _Q'min is the case if the 3≤O (alpabet O) ≤11

Where Q'm is the minimum value of Q ¹ _m and Q ² _m , where Q ^x _m (x = {1,2}) represents the modulation order of transport block x. If O (alpabet O)> 11, then Q ' _min is

Lt; / RTI >

ego,

to be. Q ' _temp can be calculated as shown in Equation (5).

Where M ^{PUSCH - inital (x)} _sc (x = {1,2}) is the scheduled bandwidths on the subframe for the initial PUSCH transmission for the first and second transport blocks, expressed as the number of subcarriers. M ^{PUSCH -} be obtained from the _{^{initial (x) sc, C (}} x), and _{^{K (x) r (x =}} {1,2}) has an initial PDCCH (or EPDCCH (enhanced-PDCCH)) for the corresponding transmission block . N ^{PUSCH -inital (x)} _symb (x = {1,2}) is the number of SC-FDMA symbols per subframe for the initial PUSCH transmission for the first and second transport blocks. N ^{PUSCH - inital (x)} _symb can be calculated as Equation (6).

N ^(x) _SRS (x = {1,2}) has a value of 1 or 0. For example, if the UE transmits the PUSCH and SRS in the same subframe for the initial transmission of the transport block "x " or if the PUSCH resource allocation for the initial transmission of the transport block" x & SRS subframe and even a partially overlapping bandwithd configuration, or if the subframe for initial transmission of transport block "x" is a UE-specific type-1 SRS subframe, or If the transport block "x" are the sub-frame for the initial transmit UE-specific SRS -0 type of sub-frame and a multi-terminal TAG (Timing Advance Group) were constructed (configured with) N ^(x) if _SRS is 1, and the other In case N ^(x) _SRS can be zero.

Referring to the above equations, it can be seen that the coding rate of UCI is determined based on the virtual MCS level generated by averaging the MCS level applied to each transport block (or each codeword) of the PUSCH. Finally, the coding rate applied to each UCI can be adjusted by using the control information MCS offset, β ^{P USCH} _{offs et} , for adjusting the coding rate of UCI. In addition, it is possible to set the lower limit of the coding rate by using a _Q'min to an element of the max expression. That is, it is possible to prevent at least falling below a specific coding rate through Q ' _min . This can prevent the occurrence of a coding rate outage problem.

The control information MCS offset β ^PUSCH _offset for coding rate adjustment can be set independently of HARQ-ACK information, RI information, and CQI / PMI information. In addition, the MCS offset is defined for a single codeword PUSCH transmission and a multiple codeword PUSCH transmission. In the case of a single codeword PUSCH transmission,? ^{HARQ - ACK} _offset ,? ^RI _offset and? ^CQI _offset can be indicated by I ^{HARQ - ACK} _offset , I ^RI _offset and I ^CQI _offset indices respectively indicated by upper layer signaling . In the case of multiple codeword PUSCH transmission, β ^{HARQ - ACK} _offset , β ^RI _offset and β ^CQI _offset are I ^{HARQ - ACK} _{offset , MC} , I ^RI _{offset , MC} and I ^CQI _offset indicated by upper layer signaling, . This is shown in Tables 1 to 3 below.

I ^{HARQ - ACK} _offset , I ^RI _offset, and I ^CQI _offset (or I ^{HARQ - ACK} _{offset , MC} , I ^RI _{offset , MC} and I ^CQI _{offset, MC} ) may be transmitted to the UE through RRC signaling, respectively .

FIG. 7 shows an example in which resource UMI is mapped to a PUSCH region of a subframe through a process as shown in FIGS. 5 and 6. FIG.

The mapping method to the PUSCH region may be different depending on the type of the UL control information. As shown in FIG. 7, the DMRS is allocated to some SC-FDMA symbols in the first slot (even slot) and the second slot (odd slot) in the PUSCH area of the subframe. As described above, the DMRS is a reference signal used for demodulating uplink data and uplink control information transmitted in the PUSCH region. 7 shows an example in which the DMRS is mapped to the SC-FDMA symbols which are the symbol index 3 of the even-numbered slot and the odd-numbered slot.

Among the uplink control information, the CQI / PMI information may be mapped from the first symbol of the subframe to the usable last symbol for one subcarrier, and may then be pumped to the next subcarrier in the frequency domain. That is, the CQI / PMI information can be mapped from the first symbol to the last symbol of the subframe except for the symbol to which the DMRS is mapped and the symbol to which the SRS is mapped (if transmitted). The subcarriers may be sequentially indexed in subcarriers from top to bottom. In this case, the CQI / PMI information can be mapped from the smallest subcarrier index of the corresponding PUSCH region. The CQI / PMI information is multiplexed with the UL-SCH data and mapped to the PUSCH area. If the CQI / PMI information is allocated with the UL-SCH data in the PUSCH region, rate matching may be used depending on the presence or absence of another UCI (e.g., RI).

Of the uplink control information, HARQ-ACK information is very important for downlink HARQ operation and can be mapped to SC-FDMA symbols of symbol indexes 2 and 4 of even and odd slot adjacent to the symbols to which the DMRS is mapped have. In this case, the HARQ-ACK information can be mapped from a subcarrier corresponding to the largest subcarrier index of the corresponding symbol. With this allocation method, HARQ-ACK information can utilize the best channel estimation result. The HARQ-ACK information may be mapped to a symbol adjacent to the symbol to which the DMRS is mapped after puncturing the data, i.e., the UL-SCH data.

Among the uplink control information, the RI information may be mapped to SC-FDMA symbols, which are symbol indexes 1 and 5 of even-numbered slots and odd-numbered slots adjacent to the symbol to which the HARQ-ACK is mapped. In this case, the HARQ-ACK information can be mapped from a subcarrier corresponding to a largest subcarrier index of the corresponding symbol (the subcarrier of the lowest PUSCH region).

Meanwhile, in recent years, an overhead reduction scheme has been considered, and in particular, a scheme for reducing the overhead of DMRS for improving the spectral efficiency of the uplink has been considered. There are various ways to reduce the overhead of the DMRS. For example, there may be DMRS mapping methods as follows.

Figures 8-10 are examples of DMRS mapping for overhead reduction.

For example, FIG. 8 shows a case where only one SC-FDMA symbol is used in one subframe and PRB pair for DMRS mapping. For example, when a normal CP is used, the DMRS can be mapped only to the SC-FDMA symbol, which is the symbol index 3 of the even slot. If the extended CP is used, the DMRS is mapped only to the SC- . That is, the DMRS may not be mapped to the odd-numbered slot. However, as an example, the DMRS may be mapped to odd-numbered slots rather than to even-numbered slots.

As another example, FIG. 9 shows a case where the DMRS mapping is changed according to the PRB index in one subframe. For example, the DMRS may be mapped to only one symbol of an even-numbered slot for an even-numbered index PRB, and may be mapped to only one symbol of an odd-numbered slot for a PRB of an odd index. For example, when the normal CP is used, the DMRS can be mapped only to the SC-FDMA symbol which is the symbol index 3 of the even-numbered slot for the even-numbered index PRB, FDMA symbols. For example, if the extended CP is used, the DMRS can be mapped only to the SC-FDMA symbol which is the symbol index 2 of the even-numbered slot for the even-numbered index PRB, and to the SC- FDMA symbols.

As another example, although FIG. 10 uses two SC-FDMA symbols in one subframe and a PRB pair, DMRS mapping can be performed using a smaller number of subcarriers. Subcarrier indices ranging from # 0 to # 11 can be assigned from top to bottom for the subcarriers in one PRB. In this case, for example, when a normal CP is used, the DMRS is mapped to a symbol which is a symbol index 3 of both the even slot and the odd slot in the time domain, and is mapped only to subcarriers of an even (or odd) subcarrier index in the frequency domain . Also, for example, when an extended CP is used, the DMRS is mapped to symbols of symbol index 2 in both the even slot and the odd slot in the time domain, but can be mapped only to subcarriers of the even (or odd) subcarrier index in the frequency domain have.

Hereinafter, the DMRS mapping according to one example (FIG. 8) and the other example (FIG. 9) will be referred to as a reduced DMRS pattern 1 and the DMRS mapping according to another example (FIG. 10) DMRS pattern 2 "

When considering such reduced DMRS patterns, a new UCI mapping method may be needed. In addition, a new UCI coding rate adjustment method may be required. In order to guarantee the performance on the wireless link such as the bloc error rate (BLER) performance of the UCI, a new UCI mapping method corresponding to the DMRS mapping pattern should be provided.

In the present invention, a new UCI transmission method is proposed considering the above considerations. Specifically, the present invention proposes a mapping and transmission method of HARQ-ACK and RI in UCI.

The UCI mapping and transmission method according to the present invention can be applied to, for example, a terminal that transmits two transport blocks (or codewords).

Method 1: By Layer (And / or by codeword) Independent Coding rate  UCI transmission method through adjustment method

11 shows an example of a UL processing structure for two TBs according to the present invention.

Referring to FIG. 11, when there is a PUSCH transmission in the current subframe, the UCI to be transmitted in the corresponding subframe is transmitted on the PUSCH. The UCI may include CQI / PMI information, RI information, and HARQ-ACK information. The UCI can be transmitted via two transport blocks (codewords). In this case, the CQI / PMI information can be transmitted by selecting only one of the plurality of transmission blocks. For example, the CQI / PMI information may be transmitted through a transport block having the highest I _MCS value. The I _MCS value represents a modulation and coding scheme (MCS) index and may be indicated by an initial UL grant. That is, when more than one UL-SCH transport block is transmitted on one subframe of the uplink cell, the CQI / PMI information only indicates the highest I _MCS value on the initial grant to the UL- Lt; / RTI > If the two transport blocks have the same I _MCS value on the corresponding initial grant, the CQI / PMI information is multiplexed with the data on the first transport block. The multiplexed data and the CQI / PMI information are input to the channel interleaver in the form of a multiplexed vector sequence.

Meanwhile, the HARQ-ACK information and the RI information may be repetitively transmitted through the plurality of transmission blocks TB # 1 and TB # 2. In this case, a unique processing procedure is performed for each transport block (or codeword). For each codeword, the HARQ-ACK information and the RI information are channel-coded according to a specific coding rate, and are input to a channel interleaver in the form of a vector sequence related to HARQ-ACK information and a vector sequence related to RI information . In this case, Q '(i.e., Q' _ACK and Q ' _RI ) indicating the number of coded modulation symbols per layer may be used for channel coding HARQ-ACK information and RI information. A codeword may include a plurality of layers. In this case, the coding rate may be controlled in the following manner.

For example, the HARQ-ACK information and the RI information are set to independent β _offset (for example, β ^{HARQ - ACK} _{offset , v} and β ^RI _{offset , v} ) for each codeword CW and each layer (Method 1-1). As another example, β _offset (for example, β ^{HARQ -ACK} _{offset, cw} and β ^RI _{offset , cw} ) may be set for each CW (method 1-2). In the method 1-1, all the layers in one CW have the same β _offset Value, the method 1-1 may include the method 1-2.

Previously, β ^{HARQ - ACK} _offset and β ^RI _offset were used for HARQ-ACK information and RI information, respectively, irrespective of CW and layer. Therefore, for two CWs for PUSCH transmission, β ^{HARQ - ACK} _offset And β ^RI _offset was only one set each. Accordingly, the respective layers are mapped on every CW were both sent the number of modulation symbols to generate a HARQ-ACK information and the RI information according to the _ACK Q'Q'and _RI have the same coding rate on the PUSCH.

However, the above-described channel coding may cause inefficient resource waste in a medium-to-high signal-to-noise ratio (SNR) environment where overhead reduction can be applied and in a channel environment of low mobility have. The conventional method uses a virtual MCS level value created by averaging the MCS level (I _MCS ) scheduled in two CWs for a robust and simple UCI resource allocation. Also, based on the value of one? ^{HARQ - ACK} _offset (or? ^RI _offset ) for HARQ-ACK information (or RI information), the same number of coded modulation symbols a _Q'(Q'Q'ACK or _RI) indicating the number of the generation, and performing channel-coding.

However, according to the basic synchronization for reducing the overhead, that is, to increase the spectral efficiency, it is possible to support more data transmission by setting a coding rate optimized for each CW or layer for UCI as in the present invention. Therefore, in order to maximize the spectral efficiency, the control information MCS offset? ^PUSCH _offset for applying a different coding rate to each layer or each CW may be set, thereby contributing to improvement of system performance.

When setting the control information MCS β offset ^PUSCH _offset by layer according to the method 1-1 of the present invention, β _offset ^PUSCH is the offset value by setting a coding rate according to the CW method 1-2 may be plotted as shown in the following Table 4 The β ^PUSCH _offset can be expressed as shown in Table 5 below.

Layer # 0 Layer # 2 CW1 β ^{HARQ - ACK} _{offset , v = 0} , β ^RI _{offset , v = 0} β ^{HARQ - ACK} _{offset , v = 1} , β ^RI _{offset , v = 1} CW2 ? ^{HARQ - ACK} _{offset , v = 2} ,? ^RI _{offset , v = 2} β ^{HARQ - ACK} _{offset , v = 3} , β ^RI _{offset , v = 3}

Layer # 0 Layer # 1 CW1 β ^{HARQ - ACK} _{offset , cw = 1} , β ^RI _{offset , cw = 1} β ^{HARQ - ACK} _{offset , cw = 1} , β ^RI _{offset , cw = 1} CW2 β ^{HARQ - ACK} _{offset , cw = 2} , β ^RI _{offset , cw = 2} β ^{HARQ - ACK} _{offset , cw = 2} , β ^RI _{offset , cw = 2}

When two CWs are transmitted, the codeword-to-layer mapping can be made as follows. When two layers are transmitted, they are mapped to one layer for each CW. When three layers are transmitted, two layers are mapped to one CW and one layer is mapped to the remaining CW. When four layers are transmitted, two layers are mapped for each CW.

Can _Q'ACK or _RI Q'of modulation symbols per layer coding for HARQ information, or RI information according to the present invention can be calculated through the following steps as shown in FIG. 12.

12 shows a procedure for obtaining Q 'for UCI according to an example of the method 1 of the present invention.

Referring to FIG. 12, when two CWs are transmitted, one virtual I _MCS value may be generated based on the I _MCS value for CW 1 and the I _MCS value for CW 2 (S 1210). In this case _, Q ' _{ACK, CW1} (or Q' _{RI , CW1} ) can be calculated for the _CW1 by applying the value of the virtual I _{MCS and the} value of β ^{HARQ - ACK} _{offset , cw = 1} (or β ^RI _{offset , cw =} and (S1220), with respect to the virtual I CW2 _MCS value and the _{^{β HARQ -ACK offset, cw = 2}} ( or β ^RI _{offset, cw = 2)} by applying a value Q _{'ACK, CW2} (or Q' _{RI, CW2)} (S1230).

Here, the? ^{HARQ - ACK} _{offset , cw = 1 ,?} ^{HARQ - ACK} _{offset , cw = 2 ,?} ^RI _{offset , cw = 1} and? ^RI _{offset , cw =} The I- ^{HARQ - ACK} _{offset , MC} , I ^RI _{offset, and MC} indices given by the ^UE . In this case, the I ^{HARQ - ACK} _{offset , MC} The offset values? ^{HARQ - ACK} _{offset , cw = 1 ,?} ^{HARQ - ACK} _{offset , cw = 2} can be indicated by one index. Or the offset values _{^{β HARQ - ACK offset, cw =}} 1, β HARQ - ACK offset, MC = 1, - I HARQ for each CW to indicate the ^ACK _{offset, cw = 2} I ^{HARQ - ACK} _{offset , MC = 2} . Similarly, the I ^RI _{offset , MC} The offset values? ^RI _{offset , cw = 1 ,?} ^RI _{offset , cw = 2} can be indicated by one index. Or the offset values _{^{β RI offset, cw = 1,}} β RI offset, I RI offset for each CW to direct _{cw = 2, MC = 1,} I ^RI _{offset , MC = 2} .

In this case, _{Q'(i.e., Q 'ACK, CW, Q} ' RI, CW) is based on Equation 4, and 5 above β offset ^PUSCH MCS value corresponding to the ^{_{offset (β HARQ - ACK offset,}} cw, β ^RI _{offset , cw} ).

On the other hand, Equation 2 used in the above-described single TB transmission can be reused to calculate Q '(i.e., Q' _{ACK , CW} , Q ' _{RI , CW} ). That is, Q 'may be calculated by substituting an MCS offset value (? ^{HARQ - ACK} _{offset , cw,?} ^RI _{offset , cw} ) corresponding to? ^PUSCH _offset on the basis of Equation (2). In this case, the procedure of S1210 may be omitted. That is, without using the virtual I _MCS index, the I _MCS Q '(i.e. Q' _{ACK, CW} , Q ' _{RI , CW} ) based on the index and each MCS offset value.

13 shows a procedure for obtaining Q 'for UCI according to another example of method 1 of the present invention.

If the Referring to Figure 13, transport the two CW, I _MCS value with respect to CW1 respect to CW1 and ^{_{β HARQ - ACK offset, cw =}} 1 ( or β ^RI _{offset, cw = 1)} by applying a value Q _{'ACK , CW1} (or Q _{'RI, CW1)} can calculate and (S1310), I _MCS value with respect to CW2 respect to CW2 and ^{_{β HARQ - ACK offset, cw =}} 2 ( or ^{_{β R I offs et, cw =}} 2) values , Q ' _{ACK , CW2} (or Q' _{RI , CW2} ) may be calculated by applying _{Q'ACK , QW} '(S1320).

Although FIGS. 12 and 13 illustrate the case of using different MCS offset values for each CW, as described above, different MCS offset values are used for each layer to represent the number of modulation symbols coded per layer Q ' _{ACK , v} (or Q' _{RI , v} ).

Based on the CW-specific Q '(Q' _{ACK , cw} and Q ' _{ACK , cw} ) or Q' (Q ' _{ACK , v} and Q' _{ACK , v} ) And channel coding for each of the RI information can be independently performed.

Meanwhile, in the above case, the number of bits Q (Q _ACK or Q _RI ) coded may be different according to CW or layer. Wherein Q is _Q'cw · Q _m, a _cw. Where Q _{m , c w} represents the modulation order for the codeword. Therefore, in order to increase the efficiency of channel coding, Q 'of CW1 and Q' of CW2 may be compared, and channel coding for CW1 and CW2 may be performed based on a larger Q '.

14 shows an example of a channel coding method according to the method 1 of the present invention.

14, the UE determines that the _Q'cw1 on the CW is less than 1 _Q'cw2 for CW 2 (S1400). Q'where _Q'cw1 may be _{ACK, cw1} or _{Q'RI, cw1. Q'cw2} can be _{Q'ACK, cw2} or _{Q'RI, cw2.}

If, Q'If _cw1 is less than _Q'cw2, the UE performs channel coding based on a _Q'cw2 against the CW1 and CW2 (S1410).

If, Q'If _cw1 is not smaller than _Q'cw2, the UE performs channel coding based on a _Q'cw1 against the CW1 and CW2 (S1410).

According to such a method, channel coding for CW with fewer number of coded bits can use some of the coded bits for CW with more number of coded bits.

On the other hand, although Fig. 14 but in comparison with each other _{Q'(Q'cw = 1} and _{Q'cw = 2)} by CW, Q'(Q'layer by _{v = 0, v Q'= 1, v = 2} Q' , Q ' _{v = 3} ), and perform channel coding based on the largest Q'.

Method 2: Selected TB  Only on Layer Layer replication  How to do it

In the method 2, a method of allocating different numbers of coded bits generated by CW or layer by layers through the proposed methods is proposed.

15 shows a layer replication method according to the method 2 of the present invention.

Referring to FIG. 15, as described above with reference to FIG. 6, the CQI / PMI information can be transmitted by selecting only one of a plurality of transmission blocks. For example, the CQI / PMI information may be transmitted through a transport block having the highest I _MCS value. In this case, N _L · Q _CQI coded bits are transmitted with respect to the CQI / PMI information only on the CW for the selected transport block.

According to method 2, the HARQ-ACK information and the RI information are also transmitted on only one selected CW in order to increase the spectral efficiency of the data transmission. In this case, channel coding is performed on the HARQ-ACK information or the RI information, layer replication is performed on the coded bits of Q _ACK or Q _RI to generate duplicated bits, Can be transmitted to the input of the interleaver.

In this case, the choice of which CW to select for transmission of HARQ-ACK information and / or RI information can be determined, for example, according to the following criteria.

For example, similar to the CQI / PMI information transmission method, the CW for the transport block having the largest I _MCS among the two transport blocks is selected as CW for HARQ-ACK information and / or RI information transmission (method 2- One). In this case, HARQ-ACK information and / or RI information can be transmitted only through the CW in which the CQI / PMI is transmitted. In this case, the selected CW performs layer replication for HARQ-ACK information and / or RI information and transmits the same.

As another example, CW for transmission of HARQ-ACK information and / or RI information is selected based on the number of layers N _L mapped to each CW (method 2-2). In this case, HARQ-ACK information and / or RI information can be transmitted only in the CW where the number of layers N _L to be mapped to one CW is two. If both CWs are N _{L =} 2, HARQ-ACK information and / or RI information may be transmitted on the first CW (CW for the first TB). In addition, if both CWs are N _{L =} 1, either the existing method or the remaining proposed methods can be applied. Of course, HARQ-ACK information and / or RI information may be transmitted only in the CW having the number of layers N _L of 1 mapped to one CW.

As another example, CW for transmission of HARQ-ACK information and / or RI information is selected based on a combination of N _L and I _MCS for each CW (method 2-3). In this case, HARQ-ACK information and / or RI information may be transmitted on the selected CW according to the following criteria.

16 shows an example of a code word selection method according to the method 2-3 of the present invention.

Check Referring to Figure 16, the terminal is I _{MCS, cw = 1} to CW 1 is equal to the _{MCS I, CW = 2} for CW 2 (S1600).

If I _{MCS , cw = 1} is not equal to I _{MCS , CW = 2} , the terminal selects a CW having the highest I _MCS (S 1610).

If, when the I _{MCS, cw = 1} is the same as the I _{MCS, CW = 2,} the terminal confirms the N _{L, cw = 1} for CW1 is equal to N _{L, cw = 2} for CW2 (S1620).

If the N _{L, cw = 1} if this is not the same as the N _{L, cw = 2} for CW2, and the terminal selects the CW having the highest N _L value (S1630). Or vice versa, i.e., the CW having the lowest N _L value.

If, when the N _{L, cw = 1} is such as N _{L, cw = 2} for CW2, the UE does not select the CW apply the conventional method for HARQ-ACK information and / or RI information transmission, or else The proposed method is applied (S1640).

The HARQ-ACK information and / or the RI information on the CW determined according to the above-mentioned criteria may be subjected to layer replication as necessary and may be subjected to channel interleaving, scrambling, modulation, codeword-to-layer mapping mapping and precoding, and then resource mapping is performed on the PUSCH region.

17 is an example of a flowchart illustrating a method of transmitting data and uplink control information on a Physical Uplink Shared Channel (PUSCH) through two codewords according to an exemplary embodiment of the present invention. FIG. 17 is applicable to a wireless communication system supporting Multiple Input Multiple Output (MIMO) transmission.

Referring to FIG. 17, the UE receives PUSCH scheduling information (S1700). For example, the UE can check whether the PUSCH is scheduled based on downlink control information (DCI) transmitted on the PDCCH. The DCI has various formats, for example, DCI format 4 can be used for PUSCH scheduling in the multi-antenna port transmission mode for the uplink. That is, the UE receives the PDCCH for the corresponding UE from the BS, and if the PDCCH includes the DCI format 4, it can be confirmed that the MIMO-based PUSCH is scheduled on the specific subframe. When MIMO transmission is set up, data and uplink control information can be transmitted through at least two codewords.

The UE calculates the _Q'cw, which is the number of the coded modulation symbols (coded modulation symbol) on the uplink control information by each of the code words (S1710). The uplink control information may be HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information. For example, when the uplink control information is the HARQ-ACK information, the Q ' _cws may be Q' _{ACK , cw} . As another example, if the uplink control information is the RI information, the Q ' _cws may be Q' _{RI , cw} . The terminal _Q'cw based on the equation (2), or 4 can be calculated.

In this case, the terminal may receive the control information of MCS offset β _{offset ^PUSCH,} I _{offset, MC} is an index indicative of _cw value for codeword-specific coding rate control from the base station through higher layer signaling. For example, when the uplink control information is the HARQ-ACK information, the? ^PUSCH _{offset , cw} β ^{HARQ - ACK} _{offset , cw} , and I _{offset , MC} may be I ^{HARQ - ACK} _{offset , MC} . As another example, when the uplink control information is the RI information, the? ^PUSCH _{offset , cw} β ^RI _{offset , cw} , and I _offset can be I ^RI _{offset , MC} .

The terminal can detect the β ^PUSCH _{offset and cw} values based on the I _{offset and the MC} . The UE may compute the _Q'cw based on said detection of β _{offset ^PUSCH, cw} value. For example, the I _offset, may include an index value of the _MC, and the terminal is the I _offset, control information for the one based on the index value, the code word by coding rate control of the _MC of MCS offset the β ^PUSCH _{offset , cw} can be detected. As another example, the I _offset, may include codewords each index value of the _MC, the terminal control information MCS offset for the code word by coding rate control based on an index value for each codeword of the I _{offset, MC} And the? ^PUSCH _{offset and cw} values, which are?

The UE performs channel coding on the uplink control information independently by each code word based on said _Q'cw (S1720). The terminal may generate a vector sequence as an output of the channel coding.

The MS controls the uplink control information to be mapped to the resource region for the PUSCH based on the channel coding output (S1730). In this case, it is possible to carry out a procedure such as layer copying on the output of the channel coding as necessary.

Although, in Fig. 17 to calculate _Q'cw by each code word, eoteuna indicate that can be set for each codeword by encoding rate independent, computing _v Q'by layer in which each codeword is mapped to each layer by coding Rate can be independently set as described above.

18 is an example of a flowchart showing a method of transmitting data and uplink control information on a PUSCH through two codewords according to another example of the present invention. FIG. 18 is applicable to a wireless communication system supporting Multiple Input Multiple Output (MIMO) transmission.

Referring to FIG. 18, the UE receives the PUSCH scheduling information (S1800). For example, the UE can check whether the PUSCH is scheduled based on the downlink DCI transmitted through the PDCCH. When MIMO transmission is set up, data and uplink control information can be transmitted through at least two codewords. The uplink control information may be HARQ-ACK information or RI information.

The MS selects one codeword for transmission of the uplink control information from among the two codewords (S1810). The terminal can select the one codeword according to a certain criterion. For example, the MS compares, and having the highest I _MCS value two I _MCS value indicating the MCS (modulation and coding scheme) the index of the two transport blocks (Transport Block) respectively corresponding to the two code words The codeword corresponding to the transmission block can be selected. As another example, the terminal may select the codeword based on N _L , which indicates the number of layers to which each codeword is mapped. In this case, the terminal can select a codeword having a larger N _L value. Or vice versa. As another example, the terminal may generate a combination of I _MCS indicating a modulation and coding scheme (MCS) index related to a transport block corresponding to each codeword and N _L indicating the number of layers to which each codeword is mapped The codeword may be selected based on the codeword. In this case, for example, the procedures of FIG. 16 described above may be followed.

The UE calculates Q 'indicating the number of coded modulation symbols related to the uplink control information for the selected codeword (S1820). For example, if the uplink control information is the HARQ-ACK information, the Q 'may be a Q' _ACK . As another example, when the uplink control information is the RI information, the Q 'may be Q' _RI .

The UE performs channel coding on the uplink control information based on the Q '(S1830). The terminal may generate a vector sequence as an output of the channel coding.

The MS controls the uplink control information to be mapped to the resource area for the PUSCH based on the channel coding output (S 1840). In this case, it is possible to carry out a procedure such as layer copying on the output of the channel coding as necessary.

19 is an example of a block diagram illustrating a terminal according to the present invention.

19, the terminal 1900 includes a communication unit 1910, a coding rate adjustment block 1920, a channel coding unit 1930, and a channel interleaver 1940.

The communication unit 1910 receives the PUSCH scheduling information from the base station via the PDCCH. The PUSCH scheduling information may be indicated through, for example, DCI format 4.

In addition, the communication unit 1910 can receive information on the reduced DMRS setting from the base station. The information on the reduced DMRS setting may be information indicating a reduced DMRS mapping in the physical layer, for example, as shown in FIG. 8, FIG. 9, or FIG.

The communication unit 1910 can receive the I _{offset , MC} indicating the values of β ^PUSCH _{offset and cw ,} which are control information MCS offsets for controlling the coding rate for each codeword, from the base station through the upper layer signaling. For example, when the uplink control information is the HARQ-ACK information, the? ^PUSCH _{offset , cw} β ^{HARQ - ACK} _{offset , cw} , and I _{offset , MC} may be I ^{HARQ- ACK} _{offset, MC} . As another example, when the uplink control information is the RI information, the? ^PUSCH _{offset , cw} β ^RI _{offset , cw} , and I _offset can be I ^RI _{offset , MC} .

The coding rate adjustment block 1920 calculates Q 'indicating the number of coded modulation symbols related to the uplink control information. The coding rate adjustment block 1920 may calculate Q ' _{cw per} codeword. The coding rate adjustment block 1920 may calculate Q ' _{v per} layer.

Coding rate control block 1920 may calculate the _Q'cw based on the above equation (2) or 4. The uplink control information may be HARQ-ACK information or RI information. For example, when the uplink control information is the HARQ-ACK information, the Q ' _cws may be Q' _{ACK , cw} . As another example, if the uplink control information is the RI information, the Q ' _cws may be Q' _{RI , cw} .

The coding rate adjustment block 1920 can detect the β ^PUSCH _{offset and cw} values based on the I _{offset , MC} . The coding rate adjustment block 1920 may calculate the Q ' _cws based on the detected β ^PUSCH _{offset, cw} values. For example, the I _offset, one may include an index value, the coding rate control block (1920) is control information for the I _offset, one based on the index value, the code word by coding rate control of the _MC of the _MC It is possible to detect the ^PUSCH _{offset , cw} values which are MCS offsets. As another example, the I _offset, may include codewords each index value of the _MC, and the coding rate control block (1920) is the I _offset, the coding rate of control by the code words, each code word by based on the index value of the _MC control information for the MCS may detect β offset ^PUSCH is the _{offset, cw} value.

The channel coding unit 1930 performs channel coding on the uplink control information independently for each codeword based on the Q ' _cws . The terminal may generate a vector sequence as an output of the channel coding.

The channel interleaver 1940 controls the uplink control information to be mapped to the resource region for the PUSCH based on the output of the channel coding. In this case, it is possible to carry out a procedure such as layer copying on the output of the channel coding as necessary.

On the other hand, the terminal 1900 may further include a code word selection unit 1950.

A codeword selection unit 1950 may select one codeword for transmission of the uplink control information among the two codewords. For example, code word selection unit (1950) are compared, and having the highest I _MCS value two I _MCS value indicating the MCS index of the two transport blocks (Transport Block) respectively corresponding to the two code words The codeword corresponding to the transmission block can be selected. As another example, the codeword selection unit 1950 may select the codeword based on N _L , which indicates the number of layers to which each codeword is mapped. In this case, the terminal can select a codeword having a larger N _L value. As another example, the codeword selection unit 1950 may select a codeword based on a combination of I _MCS representing an MCS index for a transport block corresponding to each codeword and N _L representing the number of layers to which each codeword is mapped, You can also select a codeword. In this case, the codeword selection unit 1950 may follow the procedures of FIG. 16 described above, for example.

The coding rate adjustment block 1920 calculates Q ', which indicates the number of coded modulation symbols for the uplink control information for the selected codeword. For example, if the uplink control information is the HARQ-ACK information, the Q 'may be a Q' _ACK . As another example, when the uplink control information is the RI information, the Q 'may be Q' _RI .

The channel coding unit 1930 performs channel coding on the uplink control information based on the Q '. The terminal may generate a vector sequence as an output of the channel coding.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (20)

A terminal for transmitting data and uplink control information on a Physical Uplink Shared Channel (PUSCH) through two codewords in a wireless communication system supporting Multiple Input Multiple Output (MIMO)
A coding rate adjustment block for calculating Q ' _cws indicating the number of coded modulation symbols related to the uplink control information for each codeword;
A channel coding unit that performs channel coding on the uplink control information independently for each codeword based on the Q ' _cws and generates a vector sequence; And
And a channel interleaver for mapping the uplink control information to a resource region for the PUSCH based on the vector sequence,
Wherein the uplink control information is HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information. The method according to claim 1,
And a communication unit for receiving _, via upper layer signaling _, an I _{offset , MC} indicating an index indicating the values of the control information MCS _{, i.e.} ,? ^PUSCH _{offset and cw} , for controlling a coding rate for each codeword from the base station,
Wherein the coding rate adjustment block detects the β ^PUSCH _{offset and cw} values indicated by the I _{offset , MC} and generates the Q ' _cw based on the detected β ^PUSCH _{offset and cw} values. Terminal. 3. The method of claim 2,
If the uplink control information is the HARQ-ACK information, the? ^PUSCH _{offset , cw} β ^{HARQ - ACK} _{offset , cw} , where I _{offset , MC} is I ^{HARQ - ACK} _{offset , MC} and Q ' _cw are Q' _{ACK , cw} . 3. The method of claim 2,
If the uplink control information is the RI information, the? ^PUSCH _{offset , cw} β ^RI _{offset, cw} , I _offset is I ^RI _{offset , MC} , and Q ' _cw are Q' _{RI , cw} . 3. The method of claim 2,
Wherein the coding rate adjustment block detects the ^PUSCH _{offset and cw} values as control information MCS offsets for coding rate adjustment for each codeword based on one index value of I _{offset and MC} . 3. The method of claim 2,
Wherein the coding rate adjustment block detects the? ^PUSCH _{offset and cw} values as control information MCS offsets for coding rate adjustment for each codeword based on the index value of each codeword of the I _{offset and MC} . Terminal. A terminal for transmitting data and uplink control information on a Physical Uplink Shared Channel (PUSCH) through two codewords in a wireless communication system supporting Multiple Input Multiple Output (MIMO)
A code word selection unit for selecting one code word for transmission of the uplink control information from among the two code words;
A coding rate adjustment block for calculating Q 'representing the number of coded modulation symbols related to the uplink control information for the selected codeword;
A channel coding unit that performs channel coding on the uplink control information based on the Q 'and generates a vector sequence; And
And a channel interleaver for mapping the uplink control information to a resource region for the PUSCH based on the vector sequence,
Wherein the uplink control information is HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information. 8. The method of claim 7,
The code word selection unit compares the two I _MCS value indicating the MCS (modulation and coding scheme) the index of the two transport blocks (Transport Block) respectively corresponding to the two code words, and the highest I _MCS value And selecting the codeword corresponding to the transport block having the transport block. 8. The method of claim 7,
Wherein the codeword selection unit selects the codeword based on N _L indicating the number of layers to which each codeword is mapped. 8. The method of claim 7,
The codeword selecting unit may include a combination of I _MCS representing a modulation and coding scheme (MCS) index related to a transport block corresponding to each codeword and N _L representing the number of layers to which each codeword is mapped And selecting the codeword based on the codeword. In a wireless communication system supporting Multiple Input Multiple Output (MIMO) transmission, data and uplink control information are transmitted on a Physical Uplink Shared Channel (PUSCH) through two codewords performed by a UE In this way,
Calculating _Q'cw, which is the number of the coded modulation symbols for each codeword by the uplink control information (coded modulation symbol);
Performing channel coding on the uplink control information independently for each codeword based on the Q ' _cws and generating a vector sequence; And
And controlling the uplink control information to be mapped to a resource region for the PUSCH based on the vector sequence,
Wherein the uplink control information is HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information. 12. The method of claim 11,
Receiving, through upper layer signaling, I _{offset, MC} indicating an index indicating control information MCS offsets, β ^PUSCH _{offset, cw} , for controlling a coding rate for each codeword from a base station; And
Detecting the? ^PUSCH _{offset , cw} values indicated by the I _{offset , MC} ,
Wherein the _Q'cws are generated based on the detected? ^PUSCH _{offset , cw} values. 13. The method of claim 12,
If the uplink control information is the HARQ-ACK information, the? ^PUSCH _{offset, cw} β ^{HARQ - ACK} _{offset , cw} , wherein I _{offset , MC} is I ^{HARQ - ACK} _{offset , MC} and Q ' _cw are Q' _{ACK , cw} . 13. The method of claim 12,
If the uplink control information is the RI information, the? ^PUSCH _{offset, cw} β ^RI _{offset, cw} , where I _offset is I ^RI _{offset , MC} , and Q ' _cw are Q' _{RI , cw} . 13. The method of claim 12,
^Wherein the? ^PUSCH _{offset and cw} values are detected based on one index value of I _{offset and MC} . 13. The method of claim 12,
^Wherein the? ^PUSCH _{offset and cw} values are detected based on the index value of each code word of the I _{offset and the MC} . In a wireless communication system supporting Multiple Input Multiple Output (MIMO) transmission, data and uplink control information are transmitted on a Physical Uplink Shared Channel (PUSCH) through two codewords performed by a UE In this way,
Selecting one codeword for transmission of the uplink control information from the two codewords;
Calculating Q 'indicating the number of coded modulation symbols for the uplink control information for the selected codeword;
Performing channel coding on the uplink control information based on the Q 'and generating a vector sequence; And
And controlling the uplink control information to be mapped to a resource region for the PUSCH based on the vector sequence,
Wherein the uplink control information is HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgment) information or RI (Rank Indicator) information. 18. The method of claim 17,
Wherein a code word is to compare two I _MCS value indicating the MCS (modulation and coding scheme) the index of the two transport blocks (Transport Block) respectively corresponding to the two code words, the highest I _MCS value And selecting the codeword corresponding to the transport block having the first codeword. 18. The method of claim 17,
Wherein the one codeword is selected based on N _L indicating the number of layers to which each codeword is mapped. 18. The method of claim 17,
Wherein the one codeword includes I _MCS representing a modulation and coding scheme (MCS) index for a transport block corresponding to each codeword and N _L representing the number of layers to which each codeword is mapped Gt; a < / RTI > transmission method.

Images