KR20120093760A - Method and apparatus for transmitting channel quality control information in wireless access system - Google Patents

Abstract

PURPOSE: A method for transmitting channel quality control information in a wireless access system and an apparatus thereof are provided to accurately calculate the number of resource elements for transmitting the channel quality control information according to each transmission block. CONSTITUTION: A base station can transmit an initial PDCCH(Physical Downlink Control Channel) signal including a DCI(Downlink Control Information) format 0 or a DCI format 4 to a terminal(S1910). The terminal calculates the number of resource elements which is necessary for transmitting channel quality control information from UCI(Uplink Control Information) information(S1920). The terminal generates uplink control information including CQI(Channel Quality Information) using the number of REs(S1930). The terminal can produce uplink data information transmitted through a PUSCH(Physical Uplink Shared Channel). The terminal can transmit the PUSCH signal including an UCI and UL data to the base station(S1940).

Description

Method and apparatus for transmitting channel quality control information in wireless access system {Method and Apparatus for transmitting Channel Quality Control Information in wireless access system}

The present invention relates to a wireless access system, and more particularly, to a method and apparatus for transmitting uplink channel information (UCI) including channel quality control information in a carrier aggregation environment (ie, a multi-component carrier environment). . The present invention also relates to a method and apparatus for obtaining the number of resource elements allocated to a UCI when the UCI is piggybacked on a physical uplink shared channel (PUSCH).

3GPP LTE (3rd Generation Partnership Project Long Term Evolution (Rel-8 or Rel-9) system (hereinafter referred to as LTE system) is a multi-carrier modulation (MCM) that uses a single component carrier (CC) divided into multiple bands. -Carrier Modulation) is used. However, in the 3GPP LTE-Advanced system (hereinafter, LTE-A system), a method such as Carrier Aggregation (CA), which combines one or more component carriers to support a wider system bandwidth than the LTE system, may be used. have. Carrier aggregation may be replaced by the term carrier matching, multi-component carrier environment (Multi-CC) or multicarrier environment.

In a single CC environment, such as an LTE system, only the case in which uplink control information (UCI) and data are multiplexed using multiple layers on one CC will be described. have.

However, in a carrier aggregation environment, one or more CCs may be used, and the number of UCIs may increase in multiples by the number of CCs used. For example, in the case of rank indication (RI) information, the LTE system has an information size of 2 bits to 3 bits. However, in the LTE-A system, since the total bandwidth can be extended to five CCs, RI information may have an information bit size up to 15 bits.

In this case, the UCI transmission method defined by the LTE system cannot transmit uplink control information having a large size of up to 15 bits, and cannot be encoded by a conventional Reed-Muller (RM) code. Therefore, the LTE-A system needs a new transmission method for UCI having a large size of information.

In order to solve the above problems, an object of the present invention is to provide a method for efficiently encoding and transmitting uplink control information in a multicarrier environment (or carrier aggregation environment).

Another object of the present invention is to provide a method for obtaining the number of resource elements (REs) allocated to UCI when UCI is piggybacked on data on PUSCH.

Another object of the present invention is a resource element (RE) required for transmitting channel quality control information (CQI and / or PMI) when retransmitting uplink control information using two or more transport blocks (TBs). It is to provide a method of obtaining the number of.

It is still another object of the present invention to provide a terminal device and / or a base station device supporting the above-described methods.

Technical objects to be achieved in the present invention are not limited to the above-mentioned matters, and other technical problems which are not mentioned are those skilled in the art from the embodiments of the present invention to be described below. Can be considered.

The present invention relates to methods and apparatuses for transmitting uplink channel information (UCI) including channel quality control information in a carrier aggregation environment.

)를 계산하는 단계와 부호화 심볼의 개수를 기반으로 채널품질제어정보를 물리상향링크공유채널 (PUSCH)을 통해 전송하는 단계를 포함할 수 있다.In one aspect of the present invention, a method for transmitting channel quality control information using two transport blocks in a wireless access system supporting hybrid automatic retransmission scheme (HARQ), the terminal includes a physical downlink control information (DCI) Receiving a downlink control channel (PDCCH) signal and the number of coding symbols required for transmitting channel quality control information using DCI (

) And transmitting channel quality control information through a physical uplink shared channel (PUSCH) based on the number of coding symbols.

)를 계산하고; 부호화 심볼의 개수를 기반으로 채널품질제어정보를 물리상향링크공유채널 (PUSCH)을 통해 전송할 수 있다.In another aspect of the present invention, a terminal for transmitting channel quality control information using two transport blocks in a wireless access system supporting a hybrid automatic retransmission scheme (HARQ), the transmission module for transmitting a radio signal; A receiving module for receiving a wireless signal; And a processor supporting transmission of channel quality control information. At this time, the terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI); Number of Coding Symbols Required to Transmit Channel Quality Control Information Using DCI (

); Channel quality control information may be transmitted through a physical uplink shared channel (PUSCH) based on the number of encoded symbols.

)는 수학식

을 이용하여 계산되고,DCI에는 채널품질제어정보를 전송하기 위한 제1전송블록에 대한 서브캐리어의 개수 정보(

), 제1전송블록과 관련된 코드블록의 개수에 대한 정보 ( C ^{( χ )}) 및 코드블록의 크기에 대한 정보(

)가 포함될 수 있다. 이때, 'x' 는 두 개의 전송블록에 대한 인덱스를 나타낸다.In the above aspects of the present invention, the number of encoded symbols (

) Is the equation

The number of subcarriers for the first transport block for transmitting channel quality control information is calculated in DCI.

), Information on the number of code blocks associated with the first transport block ( C ^{( χ )} ) and information on the size of the code block (

) May be included. In this case, 'x' represents an index for two transport blocks.

In the above aspects of the present invention, the first transport block is preferably a transport block having a higher modulation and coding scheme (MCS) level among the two transport blocks. However, when the modulation and coding scheme (MCS) levels of the two transport blocks are the same, the first transport block may be the first transport block of the two transport blocks.

In the step of transmitting the channel quality control information, the terminal may piggyback and transmit the channel quality control information to the uplink data retransmitted by using the HARQ method.

을 이용하여 계산될 수 있다.In this case, the terminal may further calculate information on the uplink data, the information on the uplink data is represented by the equation

It can be calculated using

In another aspect of the present invention, a method for receiving channel quality control information using two transport blocks in a wireless access system supporting hybrid automatic retransmission method (HARQ), the base station to the downlink control information (DCI) to the terminal The method may include transmitting a physical downlink control channel (PDCCH) signal, and receiving the channel quality control information from a terminal through a physical uplink shared channel (PUSCH).

)는 수학식

을 이용하여 계산되고,DCI에는 채널품질제어정보를 전송하기 위한 제1전송블록에 대한 서브캐리어의 개수 정보(

), 제1전송블록과 관련된 코드블록의 개수에 대한 정보 ( C ^{( χ )}) 및 코드블록의 크기에 대한 정보(

)가 포함될 수 있다. 이때, 'x' 는 두 개의 전송블록에 대한 인덱스를 나타낸다.At this time, the number of coding symbols required for transmitting the channel quality control information (

) Is the equation

The number of subcarriers for the first transport block for transmitting channel quality control information is calculated in DCI.

), Information on the number of code blocks associated with the first transport block ( C ^{( χ )} ) and information on the size of the code block (

) May be included. In this case, 'x' represents an index for two transport blocks.

In another aspect of the present invention, the first transport block is preferably a transport block having a higher modulation and coding scheme (MCS) level among the two transport blocks. However, when two transport blocks have the same modulation and coding scheme (MCS) level, the first transport block may be the first transport block.

을 이용하여 계산될 수 있다.The channel quality control information may be piggybacked on uplink data retransmitted using the HARQ scheme. In this case, the information on the uplink data is represented by an equation

It can be calculated using

The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be described in detail by those skilled in the art. Based on the description, it can be derived and understood.

According to the embodiments of the present invention, the following effects are obtained.

First, uplink control information may be efficiently encoded and transmitted in a multicarrier environment (or a carrier aggregation environment).

Second, in case of transmitting uplink control information using two or more transport blocks, the number of resource elements (RE) required for transmitting channel quality control information (CQI and / or PMI) can be accurately calculated according to each transport block. have.

Third, when the CQI is piggybacked into the PUSCH, the number of REs required for transmitting the CQI can be calculated accurately for each transport block. In particular, when the initial resource values of the two transport blocks are different due to HARQ retransmission, the number of REs required for CQI / PMI transmission through the PUSCH can be accurately calculated.

The effects obtained in the embodiments of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be found in the following description of the embodiments of the present invention, Can be clearly derived and understood by those skilled in the art. That is, unintended effects of practicing the present invention may also be derived from those skilled in the art from the embodiments of the present invention.

It is included as part of the detailed description to assist in understanding the present invention, and the accompanying drawings provide various embodiments of the present invention. In addition, the accompanying drawings are used to describe embodiments of the present invention in conjunction with the detailed description.
FIG. 1 is a diagram for explaining physical channels used in a 3GPP LTE system and a general signal transmission method using the same.
2 is a diagram illustrating a structure of a terminal and a signal processing process for transmitting a UL signal by the terminal.
3 is a diagram illustrating a structure of a base station and a signal processing procedure for transmitting a downlink signal by a base station.
4 is a diagram for describing a structure of a terminal, an SC-FDMA scheme, and an OFDMA scheme.
FIG. 5 is a diagram illustrating a signal mapping method in a frequency domain for satisfying a single carrier characteristic in the frequency domain.
6 is a block diagram illustrating a transmission process of a reference signal (RS) for demodulating a transmission signal according to the SC-FDMA scheme.
FIG. 7 is a diagram illustrating symbol positions to which a reference signal (RS) is mapped in a subframe structure according to the SC-FDMA scheme.
8 is a diagram illustrating a signal processing procedure in which DFT process output samples are mapped to a single carrier in a cluster SC-FDMA.
9 and 10 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a cluster SC-FDMA.
11 is a diagram illustrating a signal processing procedure of a segmented SC-FDMA.
12 illustrates a structure of an uplink subframe usable in embodiments of the present invention.
13 illustrates a process of processing UL-SCH data and control information usable in embodiments of the present invention.
14 is a diagram showing an example of a method of multiplexing uplink control information and UL-SCH data on the PUSCH.
FIG. 15 illustrates multiplexing of control information and UL-SCH data in a multiple input multiple output (MIMO) system.
16 and 17 illustrate an example of a method of multiplexing and transmitting uplink control information in a plurality of UL-SCH transport blocks included in a terminal and a terminal according to an embodiment of the present invention.
FIG. 18 is a diagram illustrating one method for mapping physical resource elements to transmit uplink data and uplink control information (UCI).
19 is a diagram illustrating one method of transmitting uplink control information according to an embodiment of the present invention.
20 is a diagram illustrating another one of methods of transmitting uplink control information according to an embodiment of the present invention.
The apparatus described with reference to FIG. 21 is a means by which the methods described with reference to FIGS. 1 through 20 may be implemented.

Embodiments of the present invention provide methods and apparatuses for transmitting and receiving uplink control information in a carrier aggregation environment (or a multi-component carrier environment). In addition, methods and apparatuses for transmitting and receiving rank indication (RI) information and methods and apparatuses for applying an error detection code to uplink control information are disclosed.

The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, some of the elements and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments.

In the description of the drawings, procedures or steps which may obscure the gist of the present invention are not described, and procedures or steps that can be understood by those skilled in the art are not described.

In the present specification, embodiments of the present invention have been described based on data transmission / reception relations between a base station and a mobile station. Here, the base station is meaningful as a terminal node of a network that directly communicates with a mobile station. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by a base station or other network nodes other than the base station. In this case, the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.

Also, the terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), a mobile subscriber station (MSS) Or an Advanced Mobile Station (AMS) or the like.

Also, the transmitting end refers to a fixed and / or mobile node providing data service or voice service, and the receiving end means a fixed and / or mobile node receiving data service or voice service. Therefore, in the uplink, the mobile station may be the transmitting end and the base station may be the receiving end. Similarly, in a downlink, a mobile station may be a receiving end and a base station may be a transmitting end.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems, and in particular, the present invention. Embodiments of may be supported by 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213 and 3GPP TS 36.321 documents. That is, self-explaining steps or parts not described in the embodiments of the present invention can be described with reference to the documents. In addition, all terms disclosed in the present document can be described by the above standard document.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

In addition, the specific terms used in the embodiments of the present invention are provided to facilitate understanding of the present invention, and the use of such specific terms can be changed to other forms without departing from the technical idea of the present invention .

The following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used in various radio access systems.

CDMA may be implemented in radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).

UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. The LTE-A (Advanced) system is an improved system of the 3GPP LTE system. In order to clarify the description of the technical features of the present invention, embodiments of the present invention will be described based on the 3GPP LTE / LTE-A system, but can also be applied to IEEE 802.16e / m system and the like.

1.3GPP LTE / LTE_A System General

In a wireless access system, a terminal receives information from a base station through downlink (DL) and transmits information to the base station through uplink (UL). The information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information they transmit and receive.

FIG. 1 is a diagram for explaining physical channels used in a 3GPP LTE system and a general signal transmission method using the same.

When the power is turned off again or the new terminal enters the cell in step S101, an initial cell search operation such as synchronization with the base station is performed in step S101. To this end, the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.

Thereafter, the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain intra-cell broadcast information. Meanwhile, the UE may check a downlink channel state by receiving a downlink reference signal (DL RS) in an initial cell search step.

After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) according to physical downlink control channel (PDCCH) and physical downlink control channel information in step S102 to be more specific. System information can be obtained.

Thereafter, the terminal may perform a random access procedure such as steps S103 to S106 to complete the access to the base station. To this end, the UE transmits a preamble through a physical random access channel (PRACH) (S103), and a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S104). In case of contention-based random access, the UE may perform contention resolution such as transmitting an additional physical random access channel signal (S105) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S106). Procedure).

After performing the above-described procedure, the UE can receive a physical downlink control channel signal and / or a physical downlink shared channel signal (S107) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure. An uplink shared channel signal and / or a physical uplink control channel (PUCCH) signal may be transmitted (S108).

The control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgment / Negative-ACK (HARQ-ACK / NACK), Scheduling Request (SR), Channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI) information. .

In the LTE system, UCI is generally transmitted periodically through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time. In addition, the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.

2 is a diagram illustrating a structure of a terminal and a signal processing process for transmitting a UL signal by the terminal.

In order to transmit the uplink signal, the scrambling module 210 of the terminal may scramble the transmission signal using the terminal specific scramble signal. The scrambled signal is input to the modulation mapper 220 and uses a Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), or 16QAM / 64QAM (Quadrature Amplitude Modulation) scheme according to the type and / or channel state of the transmitted signal. Is modulated into a complex symbol. The modulated complex symbol is processed by the transform precoder 230 and then input to the resource element mapper 240, which can map the complex symbol to a time-frequency resource element. The signal thus processed can be transmitted to the base station via the antenna via the SC-FDMA signal generator 250. [

3 is a diagram illustrating a structure of a base station and a signal processing procedure for transmitting a downlink signal by a base station.

In the 3GPP LTE system, the base station may transmit one or more codewords in downlink. The codewords may be processed as complex symbols through the scramble module 301 and the modulation mapper 302 as in the uplink of FIG. 2, respectively. Thereafter, the complex symbols are mapped to the plurality of layers by the layer mapper 303, and each layer may be multiplied by the precoding matrix by the precoding module 304 and assigned to each transmit antenna. The transmission signal for each antenna processed as described above is mapped to a time-frequency resource element by the resource element mapper 305, and then transmitted through each antenna via an orthogonal frequency division multiple access (OFDM) signal generator 306. Can be.

In a wireless communication system, when a terminal transmits a signal in uplink, a peak-to-average ratio (PAPR) is a problem as compared with a case in which a base station transmits a signal in downlink. Accordingly, as described above with reference to FIGS. 2 and 3, the uplink signal transmission uses the Single Carrier-Frequency Division Multiple Access (SC-FDMA) scheme differently from the OFDMA scheme used for the downlink signal transmission.

4 is a diagram for describing a structure of a terminal, an SC-FDMA scheme, and an OFDMA scheme.

The 3GPP system (e.g. LTE system) employs OFDMA in downlink and SC-FDMA in uplink. Referring to FIG. 4, both a terminal for uplink signal transmission and a base station for downlink signal transmission include a serial-to-parallel converter (401), a subcarrier mapper (403), and an M-point IDFT module (404). ) And the Cyclic Prefix (CP) addition module 406 are the same.

However, the terminal for transmitting a signal in the SC-FDMA scheme further includes an N-point DFT module 402. The N-point DFT module 402 partially offsets the IDFT processing impact of the M-point IDFT module 404 so that the transmitted signal has a single carrier property.

FIG. 5 is a diagram illustrating a signal mapping method in a frequency domain for satisfying a single carrier characteristic in the frequency domain.

FIG. 5A illustrates a localized mapping scheme, and FIG. 5B illustrates a distributed mapping scheme. At this time, clustered, a modified form of SC-FDMA, divides the DFT process output samples into sub-groups during subcarrier mapping, and discontinuously maps them to the frequency domain (or subcarrier domain). do.

6 is a block diagram illustrating a transmission process of a reference signal (RS) for demodulating a transmission signal according to the SC-FDMA scheme.

In the LTE standard (e.g., 3GPP release 8), the data portion is transmitted by IFFT processing after subcarrier mapping after the signal generated in the time domain is converted into a frequency domain signal through DFT processing (see FIG. 4), but RS After the DFT process is omitted, the signal is generated directly in the frequency domain (S610), mapped onto the subcarrier (S620), and then transmitted through the IFFT process (S630) and the CP addition (S640).

FIG. 7 is a diagram illustrating symbol positions to which a reference signal (RS) is mapped in a subframe structure according to the SC-FDMA scheme.

FIG. 7 (a) shows that RS is located in a fourth SC-FDMA symbol of each of two slots in one subframe in the case of a normal CP. FIG. 7 (b) shows that the RS is located in the third SC-FDMA symbol of each of two slots in one subframe in the case of an extended CP.

8 is a diagram illustrating a signal processing procedure in which DFT process output samples are mapped to a single carrier in a cluster SC-FDMA. 9 and 10 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a cluster SC-FDMA.

8 illustrates an example of applying an intra-carrier cluster SC-FDMA, and FIGS. 9 and 10 correspond to an example of applying an inter-carrier cluster SC-FDMA. FIG. 9 illustrates a case of generating a signal through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a situation in which component carriers are contiguous in the frequency domain. FIG. 10 illustrates a case where a signal is generated through a plurality of IFFT blocks in a situation in which component carriers are allocated non-contiguous in the frequency domain.

11 is a diagram illustrating a signal processing procedure of a segmented SC-FDMA.

Segment SC-FDMA is simply an extension of the conventional SC-FDMA DFT spreading and IFFT frequency subcarrier mapping configuration as the number of IFFTs equal to the number of DFTs is applied and the relationship between DFT and IFFT is one-to-one. Sometimes referred to as -FDMA or NxDFT-s-OFDMA. This specification collectively names them Segment SC-FDMA. Referring to FIG. 11, the segment SC-FDMA performs a DFT process on a group basis by grouping all time domain modulation symbols into N (N is an integer greater than 1) groups in order to alleviate a single carrier characteristic condition.

12 illustrates a structure of an uplink subframe usable in embodiments of the present invention.

Referring to FIG. 12, an uplink subframe includes a plurality of slots (eg, two). The slot may include different numbers of SC-FDMA symbols according to a cyclic prefix (CP) length. For example, in case of a normal CP, a slot may include 7 SC-FDMA symbols.

The uplink subframe is divided into a data area and a control area. The data area is an area in which a PUSCH signal is transmitted and received, and is used to transmit an uplink data signal such as voice. The control region is a region in which the PUCCH signal is transmitted and received and is used for transmitting uplink control information.

The PUCCH includes RB pairs (eg, m = 0, 1, 2, 3) located at both ends of the data region on the frequency axis. In addition, the PUCCH consists of RB pairs located at opposite ends of the frequency axis (eg, RB pairs of frequency mirrored positions), and are hopped to a slot boundary. The uplink control information (ie, UCI) includes HARQ ACK / NACK, Channel Quality Information (CQI), Precoding Matrix Indicator (PMI) and Rank Indication (RI) information. do.

13 illustrates a process of processing UL-SCH data and control information usable in embodiments of the present invention.

Referring to FIG. 13, data transmitted through the UL-SCH is transmitted to a coding unit in the form of a transport block (TB) once in each transmission time interval (TTI).

Parity bits p ₀ , p ₁ , p ₂ , p ₃ , ..., p _L in bits α ₀ , α ₁ , α ₂ , α ₃ , ..., α _{A -1} of the transport block received from the upper layer _-1 is added. At this time, the size of the transport block is A, the number of parity bits is L = 24 bits. The input bits with the CRC attached may be represented by b ₀ , b ₁ , b ₂ , b ₃ ,..., And b _{B −1} , where B represents the number of bits of the transport block including the CRC (S1300).

과 같다. 여기서 r은 코드 블록의 번호(r=0,…,C-1)이고, K_r은 코드 블록 r에 따른 비트 수이다. 또한, C는 코드 블록의 총 개수를 나타낸다 (S1310). b ₀ , b ₁ , b ₂ , b ₃ , ..., b _{B -1} are segmented into multiple code blocks (CBs) according to TB size, and CRC is divided into multiple CBs. It is attached. Bits after code block split and CRC attached

Is the same as Where r is the number of code blocks (r = 0, ..., C-1) and K _r is the number of bits according to code block r. In addition, C represents the total number of code blocks (S1310).

에 채널 부호화(Channel Coding) 단계가 수행된다. 채널 부호화 이후의 비트는

이 된다. 이때, i는 부호화된 데이터 스트림의 인덱스(i=0,1,2 )이며, D _r 은 코드 블록 r을 위한 i번째 부호화된 데이터 스트림의 비트 수를 나타낸다 (즉, D _r =K _r +4 ). r은 코드 블록 번호를 나타내고(r=0,1,…,C-1), K_r은 코드 블록 r의 비트 수를 나타낸다. 또한, C는 코드 블록의 총 개수를 나타낸다. 본 발명의 실시예들에서 각 코드 블록들은 터보 코딩 방식을 이용하여 채널 부호화될 수 있다 (S1320).Then, input to the channel coding unit

Channel coding is performed. The bits after channel coding are

. In this case, i is the index (i = 0,1,2) of the encoded data stream, D _r denotes the number of bits of the i-th encoded data stream for code block r (i.e., D _r = K _r +4 ). r represents a code block number (r = 0, 1, ..., C-1), and K _r represents the number of bits of the code block r. In addition, C represents the total number of code blocks. In the embodiments of the present invention, each code block may be channel coded using a turbo coding scheme (S1320).

과 같다. 이때, E _r 은 r-번째 코드 블록의 레이트 매칭된 비트의 개수를 나타내며, r=0,1,…,C-1이고, C는 코드 블록의 총 개수를 나타낸다 (S1330).The rate matching step is performed after the channel encoding process. Bits after rate matching

Is the same as Where E _r represents the number of rate matched bits of the _r -th code block, where r = 0, 1,... , C-1, and C represents the total number of code blocks (S1330).

After the rate matching process, a code block concatenation process is performed. After the code block concatenation, the bits become f ₀ , f ₁ , f ₂ , f ₃ , ..., f _{G -1} . In this case, G represents the total number of encoded bits. However, when control information is multiplexed with UL-SCH data and transmitted, bits used for transmission of control information are not included in G. f ₀ , f ₁ , f ₂ , f ₃ ,..., f _{G -1} correspond to a UL-SCH codeword (S1340).

In the case of uplink control information (UCI), channel quality information (CQI and / or PMI), RI, and HARQ-ACK, channel coding is independently performed (S1350, S1360, and S1370). Channel coding for each UCI is performed based on the number of coded symbols for each control information. For example, the number of coded symbols may be used for rate matching of coded control information. The number of encoded symbols corresponds to the number of modulation symbols, the number of REs, and the like in a later process.

가 된다. 채널 품질 정보는 비트 수에 따라 적용되는 채널 코딩 방식이 달라진다. 또한, 채널 품질 정보는 11비트 이상인 경우에는 CRC 8 비트가 부가된다.

는 CQI에 대한 부호화된 비트의 총 개수를 나타낸다.비트 시퀀스의 길이를

에 맞추기 위해, 부호화된 채널 품질 정보는 레이트-매칭될 수 있다.

이고,

은 CQI를 위한 부호화된 심볼의 개수이며,

은 변조 차수(order)이다.

은 UL-SCH 데이터와 동일하게 설정된다.Channel coding of channel quality information (CQI) is _{o 0, o 1, o 2} , ..., o O -1 is performed using an input bit sequence (S1350). The output bit sequence of channel coding for channel quality information is

. The channel quality information applied to the channel quality information varies depending on the number of bits. In addition, when the channel quality information is 11 bits or more, CRC 8 bits are added.

Denotes the total number of coded bits for the CQI.

In order to fit in, the coded channel quality information may be rate-matched.

ego,

Is the number of coded symbols for the CQI,

Is the modulation order.

Is set equal to UL-SCH data.

또는

를 이용하여 수행된다(S1360).

와

는 각각 1-비트 RI와 2-비트 RI 를 의미한다.RI's channel coding sequence of input bits

or

It is performed using (S1360).

Wow

Denotes 1-bit RI and 2-bit RI, respectively.

는 부호화된 RI 블록(들)의 결합에 의해 얻어진다.이때,

는 RI에 대한 부호화된 비트의 총 개수를 나타낸다. 부호화된 RI의 길이를

에 맞추기 위해, 마지막에 결합되는 부호화된 RI 블록은 일부분일 수 있다(즉, 레이트 매칭).

이고,

은 RI를 위한 부호화된 심볼의 개수이며,

은 변조 차수(order)이다.

은 UL-SCH 데이터와 동일하게 설정된다.For 1-bit RI, repetition coding is used. In the case of 2-bit RI, the (3,2) simplex code is used for encoding and the encoded data may be cyclically repeated. In addition, a 3-bit to 11-bit or less RI is encoded using a (32,0) RM code used in an uplink shared channel. For 12-bit or more RIs, RI information is added using a dual RM structure. Each group is divided into groups, and each group is encoded using a (32,0) RM code. Output bit sequence

Is obtained by combining the encoded RI block (s).

Denotes the total number of coded bits for RI. The length of the encoded RI

In order to fit in, the last encoded coded RI block may be part (ie, rate matching).

ego,

Is the number of coded symbols for RI,

Is the modulation order.

Is set equal to UL-SCH data.

,

또는

를 이용하여 수행된다.

와

는 각각 1-비트 HARQ-ACK와 2-비트 HARQ-ACK을 의미한다. 또한,

은 두 비트 이상의 정보로 구성된 HARQ-ACK을 의미한다 (즉, O ^ACK ＞2 ).Channel coding of the HARQ-ACK is the input bit sequence of step S1370

,

or

Is performed using

Wow

Denotes 1-bit HARQ-ACK and 2-bit HARQ-ACK, respectively. Also,

Means HARQ-ACK consisting of two or more bits of information (ie, O ^ACK > 2).

은 HARQ-ACK에 대한 부호화된 비트의 총 개수를 나타내며, 비트 시퀀스

는 부호화된 HARQ-ACK 블록(들)의 결합에 의해 얻어진다.비트 시퀀스의 길이를

에 맞추기 위해, 마지막에 결합되는 부호화된 HARQ-ACK 블록은 일부분일 수 있다(즉, 레이트 매칭).

이고,

은 HARQ-ACK을 위한 부호화된 심볼의 개수이며,

은 변조 차수(order)이다.

은 UL-SCH 데이터와 동일하게 설정된다.In this case, the ACK is coded as 1 and the NACK is coded as 0. For 1-bit HARQ-ACK, repetition coding is used. In the case of 2-bit HARQ-ACK, the (3,2) simplex code is used and the encoded data may be cyclically repeated. In addition, the 3-bit to 11-bit or less HARQ-ACK is encoded using the (32,0) RM code used in the uplink shared channel, and for the HARQ-ACK more than 12 bits using a dual RM structure The HARQ-ACK information is divided into two groups, and each group is encoded by using a (32,0) RM code.

Represents the total number of coded bits for HARQ-ACK, and the bit sequence

Is obtained by combining the encoded HARQ-ACK block (s).

In order to fit in, the last encoded HARQ-ACK block may be part (i.e. rate matching).

ego,

Is the number of encoded symbols for HARQ-ACK,

Is the modulation order.

Is set equal to UL-SCH data.

이다(S1380). 데이터/제어 다중화 블록의 출력은

이다.

는 길이

의 컬럼 벡터이다(i=0,...,H'-1). 이때,

(i=0,...,H'-1 )는

길이를 가지는 컬럼(column) 벡터를 나타낸다.

이고,

이다. N _L 은 UL-SCH 전송 블록이 매핑된 레이어의 개수를 나타내고, H는 전송 블록이 매핑된 N _L 개 전송 레이어에 UL-SCH 데이터와 CQI/PMI 정보를 위해 할당된 부호화된 총 비트의 개수를 나타낸다. 이때, H는 UL-SCH 데이터와 CQI/PMI를 위해 할당된 부호화된 비트의 총 개수이다.The input of the data / control multiplexing block is f ₀ , f ₁ , f ₂ , f ₃ , ..., f _{G -1} , meaning coded UL-SCH bits, and meaning coded CQI / PMI bits.

(S1380). The output of the data / control multiplexing block is

to be.

Length

Is the column vector of ( i = 0, ..., H ' -1). At this time,

( i = 0, ..., H ' -1)

Represents a column vector having a length.

ego,

to be. N _L represents the number of layers to which the UL-SCH transport block is mapped, and H represents the total number of encoded bits allocated for UL-SCH data and CQI / PMI information to the N _L transport layers to which the transport block is mapped. Indicates. In this case, H is the total number of coded bits allocated for UL-SCH data and CQI / PMI.

, 부호화된 랭크 지시자

및 부호화된 HARQ-ACK

이다 (S1390).In the channel interleaver, a channel interleaving step is performed on coded bits input to the channel interleaver. At this time, the input of the channel interleaver is the output of the data / control multiplexing block,

Coded rank indicator

And encoded HARQ-ACK

(S1390).

는 CQI/PMI를 위한 길이

의 컬럼 벡터이며, i=0,...,H'-1이다(

).

는 ACK/NACK을 위한 길이

의 컬럼 벡터이며,

이다(

).

는 RI를 위한 길이

의 컬럼 벡터를 나타내며,

이다(

).In step S1390,

Length for CQI / PMI

Is the column vector of i = 0, ..., H ' -1

).

Is the length for ACK / NACK

Is the column vector of

to be(

).

Length for RI

Represents a column vector of,

to be(

).

The channel interleaver multiplexes control information and / or UL-SCH data for PUSCH transmission. Specifically, the channel interleaver includes a process of mapping control information and UL-SCH data to a channel interleaver matrix corresponding to a PUSCH resource.

가 출력된다. 도출된 비트 시퀀스는 자원 그리드 상에 맵핑된다.Bit channel sequence from channel interleaver matrix to row-by-row after channel interleaving is performed

Is output. The derived bit sequence is mapped onto a resource grid.

14 is a diagram illustrating an example of a multiplexing method of uplink control information and UL-SCH data on a PUSCH.

When the UE wants to transmit control information in a subframe to which PUSCH transmission is allocated, the UE multiplexes uplink control information (UCI) and UL-SCH data together before DFT-spreading. The uplink control information (UCI) includes at least one of CQI / PMI, HARQ-ACK / NACK, and RI.

,

,

)에 기초한다. 오프셋 값은 제어 정보에 따라 서로 다른 코딩 레이트를 허용하며 상위 계층(예를 들어, RRC 계층) 시그널에 의해 반-정적으로 설정된다. UL-SCH 데이터와 제어 정보는 동일한 RE에 맵핑되지 않는다. 제어 정보는 서브프레임의 두 슬롯에 모두 존재하도록 맵핑된다. 기지국은 제어 정보가 PUSCH를 통해 전송될 것을 사전에 알 수 있으므로 제어 정보 및 데이터 패킷을 손쉽게 역-다중화할 수 있다.The number of REs used for CQI / PMI, ACK / NACK, and RI transmissions is determined by the Modulation and Coding Scheme (MCS) and Offset Value (MCS) allocated for PUSCH transmission.

,

,

Based). The offset value allows different coding rates according to the control information and is set semi-statically by higher layer (eg RRC layer) signals. UL-SCH data and control information are not mapped to the same RE. Control information is mapped to exist in both slots of the subframe. The base station can know in advance that the control information will be transmitted on the PUSCH, so that the control information and data packets can be easily de-multiplexed.

Referring to FIG. 14, CQI and / or PMI (CQI / PMI) resources are located at the beginning of UL-SCH data resources and are sequentially mapped to all SC-FDMA symbols on one subcarrier and then mapped on the next subcarrier. . The CQI / PMI is mapped in the subcarrier from left to right, i.e., the direction in which the SC-FDMA symbol index increases. PUSCH data (UL-SCH data) is rate-matched taking into account the amount of CQI / PMI resources (ie, the number of coded symbols). The same modulation order as the UL-SCH data is used for CQI / PMI.

For example, if the CQI / PMI information size (payload size) is small (for example, 11 bits or less), the CQI / PMI information uses (32, k) block codes similar to PUCCH data transmission and is encoded. The data can be repeated circularly. If the size of the CQI / PMI information is small, the CRC is not used.

If the CQI / PMI information size is large (e.g., more than 11 bits), an 8-bit CRC is added and channel coding and rate matching is performed using tail-biting convolutional code. . The ACK / NACK is inserted through puncturing into a part of the SC-FDMA resource to which the UL-SCH data is mapped. The ACK / NACK is located next to the RS and is filled in the direction of increasing up, i.e., subcarrier index, starting from the bottom in the corresponding SC-FDMA symbol.

In case of a normal CP, the SC-FDMA symbol for ACK / NACK is located in the SC-FDMA symbol # 2 / # 4 in each slot as shown in FIG. Regardless of whether ACK / NACK actually transmits in a subframe, the coded RI is located next to the symbol for ACK / NACK (ie, symbols # 1 / # 5). At this time, ACK / NACK, RI and CQI / PMI are independently coded.

FIG. 15 illustrates multiplexing of control information and UL-SCH data in a multiple input multiple output (MIMO) system.

Referring to FIG. 15, the terminal identifies a rank n_sch for a UL-SCH (data part) and a PMI related thereto from scheduling information for PUSCH transmission (S1510). In addition, the terminal determines a rank (n_ctrl) for the UCI (S1520). Although not limited thereto, the rank of the UCI may be set equal to the rank of the UL-SCH (n_ctrl = n_sch). Thereafter, multiplexing of data and control channels is performed (S1530). Thereafter, the channel interleaver performs time-first mapping of data / CQI and punctures around the DM-RS to map ACK / NACK / RI (S1540). Thereafter, modulation of the data and the control channel is performed according to the MCS table (S1550). Modulation schemes include, for example, QPSK, 16QAM, 64QAM. The order / position of the modulation blocks can be changed (eg, prior to multiplexing of data and control channels).

16 and 17 illustrate an example of a method of multiplexing and transmitting uplink control information in a plurality of UL-SCH transport blocks included in a terminal and a terminal according to an embodiment of the present invention.

For convenience, FIGS. 16 and 17 assume that two codewords are transmitted, but FIGS. 16 and 17 may also be applied when transmitting one or more codewords. Codewords and transport blocks correspond to each other and in this specification they are mixed with each other. Since the basic process is the same / similar to that described with reference to Figs.

Assuming that two codewords are transmitted in FIG. 16, channel coding is performed for each codeword (160). In addition, rate matching is performed according to a given MCS level and resource size ( 161). The encoded bits may be scrambled in a cell-specific or UE-specific or codeword-specific manner (162). Thereafter, codeword to layer mapping is performed (163). In this process, an operation of layer shift or permutation may be included.

Codeword-to-layer mapping performed in function block 163 may be performed using the codeword-to-layer mapping method illustrated in FIG. 17. The position of precoding performed in FIG. 17 may be different from the position of precoding in FIG. 13.

Referring back to FIG. 16, control information such as CQI, RI and ACK / NACK are channel coded in channel coding blocks 165 according to a given specification. In this case, the CQI, RI, and ACK / NACK may be encoded by using the same channel code for all codewords, or may be encoded by using a different channel code for each codeword.

Thereafter, the number of encoded bits may be changed by the bit size control unit 166. The bit size control unit 166 may be unified with the channel coding block 165. The signal output from the bit size controller is scrambled (167). At this time, scrambling may be performed cell-specifically, layer-specifically, codeword-specifically, or UE-specifically.

The bit size control unit 166 may operate as follows.

(1) The bit size control section recognizes a rank n_rank_pusch of data for the PUSCH.

(2) The rank of the control channel (n_rank_control) is set to be equal to the rank of the data (that is, n_rank_control = n_rank_pusch), and the number of bits (n_bit_ctrl) for the control channel is multiplied by the rank of the control channel, thereby extending the number of bits. .

One way to do this is to simply copy and repeat the control channel. In this case, the control channel may be an information level before channel coding or an encoded bit level after channel coding. For example, in the case of control channels [a0, a1, a2, a3] and n_rank_pusch = 2 where n_bit_ctrl = 4, the number of extended bits (n_ext_ctrl) is [a0, a1, a2, a3, a0, a1, a2, a3] can be 8 bits.

Alternatively, the circular buffer method may be applied such that the extended number n_ext_ctrl is 8 bits as described above.

In the case where the bit size controller 166 and the channel encoder 165 are configured as one, the encoded bits may be generated by applying channel coding and rate matching defined in an existing system (for example, LTE Rel-8). have.

In addition to the bit size controller 166, bit level interleaving may be performed to further randomize each layer. Alternatively, interleaving may be equivalently performed at the modulation symbol level.

Control information (or control data) for the CQI / PMI channel and the two codewords may be multiplexed by a data / control multiplexer 164. Then, while allowing the ACK / NACK information to be mapped to the RE around the uplink DM-RS in each of two slots in one subframe, the channel interleaver 168 maps the CQI / PMI according to a time-first mapping method. .

Subsequently, the modulation mapper 169 performs modulation on each layer, the DFT precoder 170 performs DFT precoding, and the MIMO precoder 171 performs MIMO precoding, and the resource element mapper 172. RE mapping is performed sequentially. Then, the SC-FDMA signal generator 173 generates an SC-FDMA signal and transmits the generated control signal through the antenna port.

The above-described functional blocks are not limited to the position shown in FIG. 16, and the position may be changed in some cases. For example, the scrambling blocks 162 and 167 may be located after the channel interleaving block. In addition, the codeword to layer mapping block 163 may be located after the channel interleaving block 168 or after the modulation mapper block 169.

2. Multi-Carrier Aggregation Environment

The communication environment considered in the embodiments of the present invention includes a multi-carrier support environment. That is, a multicarrier system or a carrier aggregation system used in the present invention refers to one or more components having a bandwidth smaller than a target band when configuring a target broadband to support a broadband. The system refers to a system that uses a carrier (CC).

In the present invention, the multi-carrier refers to the aggregation (or carrier coupling) of the carrier, wherein carrier aggregation means not only coupling between adjacent carriers, but also coupling between non-adjacent carriers. In addition, carrier combining may be used interchangeably with terms such as carrier aggregation, bandwidth combining, and the like.

A multicarrier (ie, carrier aggregation) configured by combining two or more component carriers (CCs) aims to support up to 100 MHz bandwidth in an LTE-A system. When combining one or more carriers having a bandwidth smaller than the target band, the bandwidth of the combining carrier may be limited to the bandwidth used by the existing system to maintain backward compatibility with the existing IMT system.

For example, the existing 3GPP LTE system supports {1.4, 3, 5, 10, 15, 20} MHz bandwidth, and 3GPP LTE_advanced system (ie LTE_A) uses only the bandwidths supported by LTE than 20MHz. Can support large bandwidth. In addition, the multicarrier system used in the present invention may support carrier aggregation (ie, carrier aggregation, etc.) by defining a new bandwidth regardless of the bandwidth used in the existing system.

The LTE-A system uses the concept of a cell to manage radio resources. A cell is defined as a combination of downlink resources and uplink resources, and uplink resources are not required. Accordingly, the cell may be configured with only downlink resources or with downlink resources and uplink resources. If multicarrier (ie, carrier aggregation, or carrier aggregation) is supported, the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource is determined by the system. It can be indicated by information (SIB).

Cells used in the LTE-A system include a primary cell (PCell: Primary Cell) and a secondary cell (SCell: Secondary Cell). The P cell may mean a cell operating on a primary frequency (eg, primary CC), and the S cell may mean a cell operating on a secondary frequency (eg, SCC: secondary CC). However, only one P cell is allocated to a specific terminal, and one or more S cells may be allocated.

The PCell is used for the UE to perform an initial connection establishment process or to perform a connection re-establishment process. The Pcell may refer to a cell indicated in the handover process. The SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.

P cell and S cell may be used as a serving cell. In case of the UE that is in the RRC_CONNECTED state but the carrier aggregation is not configured or does not support the carrier aggregation, there is only one serving cell composed of the PCell. On the other hand, in case of a UE in RRC_CONNECTED state and carrier aggregation is configured, one or more serving cells may exist, and the entire serving cell includes a PCell and one or more SCells.

After the initial security activation process begins, the E-UTRAN may configure a network including one or more Scells in addition to the Pcells initially configured in the connection establishment process. In a multicarrier environment, the Pcell and the SCell may operate as respective component carriers (CCs). That is, multi-carrier aggregation may be understood as a combination of a Pcell and one or more Scells. In the following embodiments, the primary component carrier (PCC) may be used in the same sense as the PCell, and the secondary component carrier (SCC) may be used in the same sense as the SCell.

3. Method of transmitting uplink control information

Embodiments of the present invention relate to a channel coding method for UCI, a resource allocation method for UCI, and UCI transmission methods when UCI is piggybacked to data on a PUSCH in a carrier aggregation (CA) environment. Embodiments of the present invention may be basically applied to the SU-MIMO environment, and may be applied to a single antenna transmission environment as a special case of SU-MIMO.

3.1 UCI allocation location on PUSCH

FIG. 18 is a diagram illustrating one method for mapping physical resource elements to transmit uplink data and uplink control information (UCI).

18 shows a method of transmitting UCI in case of 2 code words and 4 layers. In this case, the CQI is mapped to the other REs using the same modulation order as the data and all constellation points in the remaining REs except for the REs to which the RIs are mapped in a time-first mapping manner. In the case of SU-MIMO, the CQI is spread in one codeword and transmitted. For example, the CQI is transmitted in a codeword of which MCS level is higher among two codewords, and is transmitted in codeword 0 when the MCS level is the same.

In addition, the ACK / NACK is arranged while puncturing a combination of data and a CQI that is already mapped to symbols located on both sides of the reference signal. Since the reference signal is located in the 3rd, 10th symbols, it is mapped upward starting from the lowest subcarrier of the 2nd, 4th, 9th, and 11th symbols. At this time, the ACK / NACK symbols are mapped in the order of 2, 11, 9, 4 symbols.

The RI is mapped to a symbol located next to the ACK / NACK, and is mapped first of all information (data, CQI, ACK / NACK, RI) transmitted on the PUSCH. In more detail, RI is mapped upward starting from the lowest subcarrier of the 1st, 5th, 8th, and 12th symbols. At this time, the RI symbols are mapped in the order of 1, 12, 8, 5th symbols.

In particular, ACK / NACK and RI are mapped in the same way as QPSK using only four corners of the constellation diagram when the information bits are 1 or 2 bits in size, and the same modulation as data for 3 or more bits of information. All constellations of the order can be mapped using. In addition, the ACK / NACK and the RI transmit the same information using the same resource at the same location in all layers.

3.2 Calculation of Coded Modulation Symbol Number for HARQ-ACK Bit or RI-1

In the embodiments of the present invention, the number of modulation symbols may be used as the same meaning as the number of encoded symbols or the number of REs.

The control information or control data is input in the form of channel quality information (CQI and / or PMI), HARQ-ACK, and RI to the channel coding block (for example, S1350, S1360, S1370, or 165 of FIG. 16). . Since different numbers of coded symbols are allocated for transmission of control information, different coding rates are applied according to the control information. When the control information is transmitted on the PUSCH, the control information bits o ₀ , o ₁ , o ₂ ,..., For the uplink channel state information (CSI), HARQ-ACK, RI, and CQI (or PMI). , channel coding for o _o-1 is performed independently.

When the UE transmits ACK / NACK (or RI) information bits on the PUSCH, the number of resource elements for ACK / NACK (or RI) per layer may be calculated according to Equation 1 below.

)로표현될수있다. 여기서, O 는 ACK/NACK(또는 RI)의 비트수를 나타내고,

,

은 각각 전송 블록에 따른 전송 코드 워드의 개수에 따라 결정된다. 이때, 데이터와 UCI간 SNR 차이를 고려하기 위한 오프셋값을 설정하기 위한 파라미터는 각각

,

으로 정해진다.In Equation 1, the number of resource elements for ACK / NACK (or RI) is represented by the number of coded modulation symbols (

Can be expressed as Where O represents the number of bits of ACK / NACK (or RI),

,

Is determined according to the number of transmission code words according to each transport block. At this time, the parameters for setting the offset value for considering the SNR difference between the data and the UCI, respectively

,

It is decided.

는 전송 블록을 위한 현재 서브 프레임 내에서 PUSCH 전송을 위해 할당된(스케줄링된) 대역폭을 부반송파의 개수로 나타낸 것이다.

는 위와 동일한 전송 블록을 위한 초기 PUSCH 전송 서브 프레임 당 SC-FDMA 심볼의 개수를 나타내고,

는 초기 PUSCH 전송을 위한 서브프레임 당 부반송파의 개수를 나타낸다.

는 다음 수학식 2와 같이 산출될 수 있다.

Denotes the number of subcarriers, the bandwidth allocated (scheduled) for PUSCH transmission in the current subframe for the transport block.

Denotes the number of SC-FDMA symbols per initial PUSCH transmission subframe for the same transport block,

Denotes the number of subcarriers per subframe for initial PUSCH transmission.

May be calculated as in Equation 2 below.

In this case, the N _SRS is a case in which the UE transmits the PUSCH and the SRS in the same subframe for initial transmission or the PUSCH resource allocation for the initial transmission partially overlaps the subframe and frequency bandwidth of the cell-specific SRS. In this case, it may be set to 1, and in other cases, it may be set to 0.

), 전송 블록으로부터 도출되는 코드블록의 총 개수( C ) 및 각 코드블록에 대한 크기(

)는 동일한 전송 블록에 대한 초기 PDCCH로부터 획득될 수 있다.Number of subcarriers of the transport block for initial transmission (

), The total number of code blocks ( C ) derived from the transport block, and the size for each code block (

) May be obtained from an initial PDCCH for the same transport block.

, C 및

는 상기 동일한 전송 블록을 위한 초기 PUSCH이 반-정적 스케줄링(semi-persistent scheduling) 되었을 때, 가장 최근의 반-정적 스케줄링 할당 PDCCH로부터 결정될 수 있다. 또는, 임의 접속 응답 그랜트(random access response grant)에 의해 PUSCH가 초기화되었을 때, 상기 동일한 전송 블록에 대한 임의 접속 응답 그랜트로부터 결정될 수 있다.If these values are not included in the initial PDCCH (DCI format 0 or 4), the values may be determined in other ways. E.g,

, C and

When the initial PUSCH for the same transport block is semi-persistent scheduling, it can be determined from the most recent semi-static scheduling allocation PDCCH. Alternatively, when the PUSCH is initialized by a random access response grant, it may be determined from a random access response grant for the same transport block.

와 같으며, RI의 부호화된 비트의 총 개수는

와 같다. 여기서,

은 변조 차수(order)에 따른 심볼 당 비트 수로 QPSK인 경우 2, 16QAM인 경우 4, 64QAM인 경우 6과 같다.As described above, when the number of resource elements for ACK / NACK (or RI) is obtained, the number of bits after channel encoding of the ACK / NACK (or RI) can be obtained by considering a modulation scheme. The total number of encoded bits of ACK / NACK is

The total number of encoded bits of RI is

Same as here,

The number of bits per symbol according to the modulation order is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM.

On the other hand, if the SNR or the spectral efficiency is high, rate matching acts as puncturing to prevent the minimum distance of the codeword coded through the Reed-Muller (RM) code from becoming 0. The minimum value of resource elements allocated to / NACK and RI can be determined. In this case, the minimum value of the defined resource element may have a different value according to the information bit size of ACK / NACK or RI.

3.3 Calculation of Number of Coded Modulation Symbols for CQI and / or PMI-1

When the UE transmits channel quality control information (CQI or PMI) bits on the PUSCH, the number of resource elements for CQI or PMI per layer may be calculated according to Equation 3 below.

)로표현될수있다.이하에서는 CQI를 위주로 설명하지만 PMI에도 동일하게 적용할 수 있다.In Equation 3, the number of resource elements for CQI or PMI is represented by the number of coded modulation symbols (

The following description focuses on CQI, but the same applies to PMI.

와 같다.In Equation 3, O represents the number of bits of the CQI. L represents the number of bits of the CRC added to the CQI bit. In this case, L has a value of 0 when O is 11 bits or less, and 8 otherwise. In other words,

Same as

는 전송 블록에 따른 전송 코드 워드의 개수에 따라 결정되며, 데이터와 UCI간 SNR 차이를 고려하기 위한 오프셋값을 결정하기 위한 파라미터는

으로 정해진다.

Is determined according to the number of transmission codewords according to the transport block.

It is decided.

는 전송 블록을 위한 현재 서브 프레임 내에서 PUSCH 전송을 위해 할당된(스케줄링된) 대역폭을 부반송파의 개수로 나타낸 것이다.

는 현재 PUSCH가 전송되는 서브 프레임 내에서 SC-FDMA 심볼의 개수를 나타내며, 상술한 수학식 2와 같이 구해질 수 있다.

Denotes the number of subcarriers, the bandwidth allocated (scheduled) for PUSCH transmission in the current subframe for the transport block.

Denotes the number of SC-FDMA symbols in a subframe in which a current PUSCH is transmitted, and can be obtained as shown in Equation 2 above.

는 동일한 전송 블록을 위한 초기 PUSCH 전송 서브프레임 당 SC-FDMA 심볼의 개수를 나타내고,

는 해당 서브프레임에 대한 부반송파의 개수를 나타낸다.

에서 x는 상향링크 그랜트에 의해 지정된 MCS가 가장 높은 전송 블록의 인덱스를 나타낸다.

Denotes the number of SC-FDMA symbols per initial PUSCH transmission subframe for the same transport block,

Denotes the number of subcarriers for the corresponding subframe.

X denotes the index of the transport block with the highest MCS specified by the uplink grant.

, C 및

는 동일한 전송 블록을 위한 초기 PDCCH로부터 획득될 수 있다.

, C 및

값이 초기 PDCCH(DCI 포맷 0)에 포함되지 않은 경우, 단말은 다른 방법으로 해당 값들을 결정할 수 있다.At this time,

, C and

May be obtained from an initial PDCCH for the same transport block.

, C and

If the value is not included in the initial PDCCH (DCI format 0), the UE may determine the corresponding values in other ways.

, C 및

값들이 결정될 수 있다. 또는, 임의 접속 응답 그랜트(random access response grant)에 의해 PUSCH가 초기화되었을 때, 동일한 전송 블록을 위한 임의 접속 응답 그랜트로부터

, C 및

값들이 결정될 수 있다.For example, when the initial PUSCH for the same transport block as the initial transmission is semi-persistent scheduling, the most recently from the semi-static scheduling allocation PDCCH

, C and

Values can be determined. Or from a random access response grant for the same transport block when the PUSCH is initialized by a random access response grant

, C and

Values can be determined.

The data information (G) bit of the UL-SCH may be calculated as shown in Equation 4 below.

는 CQI의 부호화된 비트의 총 개수를 나타내며,

와 같다. 여기서,

은 변조 차수(order)에 따른 심볼 당 비트 수로 QPSK인 경우 2, 16QAM인 경우 4, 64QAM인 경우 6과 같다. RI를위한자원을우선적으로 할당하므로RI에 할당된 자원 요소의 개수를 제외한다. RI가 전송되지 않으면,

과 같다.As described above, when the number of resource elements for the CQI is obtained, the number of bits after channel coding of the CQI can be obtained in consideration of the modulation scheme.

Denotes the total number of coded bits of the CQI,

Same as here,

The number of bits per symbol according to the modulation order is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM. Since the resources for RI are allocated first, the number of resource elements allocated to RI is excluded. If no RI is sent,

Is the same as

3.4 Count Coded Modulated Symbols for HARQ-ACK Bit or RI-2

Hereinafter, methods for obtaining the number of resource elements (REs) used in ACK / NACK and RI different from those described in Section 3.1 will be described.

를 결정해야 한다. 다음 수학식 5는 UL 셀에서 오직 하나의 전송블록이 전송되는 경우에 변조 심볼의 개수를 구하기 위해 사용된다.When the UE transmits HARQ-ACK bits or RI bits in a single cell, the UE number of coded modulation symbols per layer for HARQ-ACK or RI

Must be determined. Equation 5 is used to obtain the number of modulation symbols when only one transport block is transmitted in a UL cell.

)로표현될수있다 여기서, O 는 ACK/NACK(또는 RI)의 비트수를 나타낸다.In Equation 5, the number of resource elements for ACK / NACK (or RI) is represented by the number of coded modulation symbols (

Where O represents the number of bits of ACK / NACK (or RI).

,

은 각각 전송 블록에 따른 전송 코드 워드의 개수에 따라 결정된다. 이때, 데이터와 UCI간 SNR 차이를 고려하기 위한 오프셋값을 설정하기 위한 파라미터는 각각

,

으로 정해진다.

,

Is determined according to the number of transmission code words according to each transport block. At this time, the parameters for setting the offset value for considering the SNR difference between the data and the UCI, respectively

,

It is decided.

는 전송 블록을 위한 현재 서브 프레임 내에서 PUSCH 전송을 위해 할당된(스케줄링된) 대역폭을 부반송파의 개수로 나타낸 것이다.

는 동일한 전송 블록을 위한 초기 PUSCH 전송 서브 프레임 당 SC-FDMA 심볼의 개수를 나타내고,

는 초기 PUSCH 전송을 위한 서브프레임 당 부반송파의 개수를 나타낸다.

는 상기 수학식 2와 같이 산출될 수 있다.

Denotes the number of subcarriers, the bandwidth allocated (scheduled) for PUSCH transmission in the current subframe for the transport block.

Denotes the number of SC-FDMA symbols per initial PUSCH transmission subframe for the same transport block,

Denotes the number of subcarriers per subframe for initial PUSCH transmission.

May be calculated as shown in Equation 2 above.

), 전송 블록으로부터 도출되는 코드블록의 총 개수 ( C ) 및 각 코드블록에 대한 크기(

)는 동일한 전송 블록에 대한 초기 PDCCH로부터 획득될 수 있다.Number of subcarriers of the transport block for initial transmission (

), The total number of code blocks derived from the transport block ( C ), and the size for each code block (

) May be obtained from an initial PDCCH for the same transport block.

, C 및

는 상기 동일한 전송 블록을 위한 초기 PUSCH이 반-정적 스케줄링(semi-persistent scheduling) 되었을 때, 가장 최근의 반-정적 스케줄링 할당 PDCCH로부터 결정될 수 있다. 또는, 임의 접속 응답 그랜트(random access response grant)에 의해 PUSCH가 초기화되었을 때, 상기 동일한 전송 블록에 대한 임의 접속 응답 그랜트로부터 결정될 수 있다.If these values are not included in the initial PDCCH (DCI format 0 or 4), the values may be determined in other ways. E.g,

, C and

When the initial PUSCH for the same transport block is semi-persistent scheduling, it can be determined from the most recent semi-static scheduling allocation PDCCH. Alternatively, when the PUSCH is initialized by a random access response grant, it may be determined from a random access response grant for the same transport block.

를 결정해야 한다. 다음 수학식 6 및 7은 UL 셀에서 두 전송블록의 초기 전송 자원값이 다른 경우에 변조 심볼의 개수를 구하기 위해 사용된다.When the UE wants to transmit two transport blocks in the UL cell, the UE can determine the number of coded modulation symbols per layer for HARQ-ACK or RI.

Must be determined. Equations 6 and 7 are used to obtain the number of modulation symbols when the initial transmission resource values of the two transport blocks are different in the UL cell.

)로표현될수있다. 여기서, O 는 ACK/NACK (또는 RI)의 비트 수를 나타낸다. 이때, _{O ≤2} 이고

이면

이고, 그렇지 않으면

이다.

은 전송블록 'x' 의 변조차수를 나타내고,

은 제1전송블록 및 제2전송블록을 위한 초기 서브프레임에서 PUSCH 전송을 위해 부반송파의 개수로서 표현되는 스케줄된 대역폭을 나타낸다.In equations (6) and (7), the number of resource elements for ACK / NACK (or RI) is represented by the number of coded modulation symbols (

Can be expressed as Here, O represents the number of bits of ACK / NACK (or RI). At this time, _O and _≤2

If

, Otherwise

to be.

Denotes the modulation order of transport block 'x',

Denotes a scheduled bandwidth expressed as the number of subcarriers for PUSCH transmission in an initial subframe for the first transport block and the second transport block.

은 제1전송블록 및 제2전송블록에 대한 초기 PUSCH 전송을 위한 서브프레임 당 SC-FDMA 심볼의 개수를 나타낸다.

는 다음 수학식 8로부터 계산될 수 있다.Also,

Denotes the number of SC-FDMA symbols per subframe for initial PUSCH transmission for the first transport block and the second transport block.

Can be calculated from the following equation (8).

은 1이고, 그렇지 않으면

은 0이다.In Equation 8, when the UE transmits the PUSCH and the SRS in the same subframe for the initial transmission of the transport block 'x' or the PUSCH resource allocation for the initial transmission of the transport block 'x' is a cell-specific RSR subframe and bandwidth Partially overlapping configuration

Is 1, otherwise

Is zero.

, C ,및

값들은 상응하는 전송블록을 위한 초기 PDCCH로부터 획득할 수 있다. 만약, DCIIn embodiments of the present invention the terminal is

, C , and

The values can be obtained from the initial PDCCH for the corresponding transport block. If DCI

, C ,및

값들은 동일한 전송블록을 위한 초기 PUSCH가 반-정적 스케줄링(semi-persistent scheduling) 되었을 때, 가장 최근의 반-정적 스케줄링 할당 PDCCH로부터 결정될 수 있다. 또는, 임의 접속 응답 그랜트(random access response grant)에 의해 PUSCH가 초기화되었을 때,

, C ,및

값들은 상기 동일한 전송 블록에 대한 임의 접속 응답 그랜트로부터 결정될 수 있다.If these values are not included in the initial PDCCH (DCI format 0 or 4), the values may be determined in other ways. E.g,

, C , and

The values may be determined from the most recent semi-static scheduling assignment PDCCH when the initial PUSCH for the same transport block is semi-persistent scheduling. Or when the PUSCH is initialized by a random access response grant,

, C , and

Values may be determined from a random access response grant for the same transport block.

,

은 각각 전송 블록에 따른 전송 코드 워드의 개수에 따라 결정된다. 이때, 데이터와 UCI간 SNR 차이를 고려하기 위한 오프셋값을 설정하기 위한 파라미터는 각각

,

으로 정해진다.In equations 6 and 7

,

Is determined according to the number of transmission code words according to each transport block. At this time, the parameters for setting the offset value for considering the SNR difference between the data and the UCI, respectively

,

It is decided.

3.5 Count Coded Modulation Symbols for CQI and / or PMI-2

When the UE transmits channel quality control information (CQI and / or PMI) bits on the PUSCH, the UE should calculate the number of resource elements for CQI and / or PMI per layer. Hereinafter, the channel quality control information will be described based on the CQI, but this description may be equally applied to the PMI.

19 is a diagram illustrating one method of transmitting uplink control information according to an embodiment of the present invention.

Referring to FIG. 19, an eNB may transmit an initial PDCCH signal including DCI format 0 or DCI format 4 to a UE (S1910).

)에 대한 정보, 코드블록의 개수에 대한 정보( C ^{( χ )}) 및 코드블록의 크기에 대한 정보(

)들이 포함될 수 있다.In step S1910, the initial PDCCH includes the number of subcarriers (

), Information about the number of code blocks ( C ^{( χ )} ), and information about the size of code blocks (

) May be included.

, C ^{( χ )} 및

값이 초기 PDCCH(DCI 포맷 0/4)에 포함되지 않은 경우, 단말은 다른 방법으로 해당 값들을 결정할 수 있다.If, in step S1910

, C ^{( χ )} and

If the value is not included in the initial PDCCH (DCI format 0/4), the UE may determine the corresponding values in other ways.

, C ^{( χ )} 및

값들이 결정될 수 있다. 또는, 임의 접속 응답 그랜트(random access response grant)에 의해 PUSCH가 개시되었을 때, 동일한 전송 블록을 위한 임의 접속 응답 그랜트로부터

, C ^{( χ )} 및

값들이 결정될 수 있다.For example, when the initial PUSCH for the same transport block as the initial transmission is semi-persistent scheduling, the most recently from the semi-static scheduling allocation PDCCH

, C ^{( χ )} and

Values can be determined. Or from a random access response grant for the same transport block when the PUSCH is initiated by a random access response grant

, C ^{( χ )} and

Values can be determined.

Referring back to FIG. 19, the UE may calculate a resource element for transmitting uplink control information using the information received in step S1910. In particular, in FIG. 19, the UE may calculate the number of resource elements RE required to transmit channel quality control information CQI / PMI among UCI information (S1920).

In the embodiments of the present invention, in the case of CQI / PMI, MCS is spread by being spread or multiplexed on all layers belonging to a high TB and then transmitted. If the MCS levels of the two TBs are the same, the CQI is transmitted in the first TB in principle.

은 다음 수학식 9와 같이 계산될 수 있다.However, since the size of an initial resource block (RB) set between two TBs may be different due to retransmission, the number of REs for CQI transmitted through the PUSCH in step S1920.

May be calculated as shown in Equation 9.

Equation 9 is calculated in a manner similar to Equation 3. However, Equation 3 may not be used when retransmitting UL data and / or UCI and the like, when the initial RB size of TB to which the retransmission packet is transmitted is different. That is, Equation 9 may be applied to the case of transmitting the PUSCH using one or more TBs in a multicarrier aggregation environment.

)로표현될수있다.이하에서는 CQI를 위주로 설명하지만 PMI에도 동일하게 적용할 수 있다. 또한, 수학식 9에서 'x' 는 전송블록(TB)의 인덱스를 나타낸다.In Equation 9, the number of resource elements for CQI or PMI is represented by the number of coded modulation symbols (

The following description focuses on CQI, but the same applies to PMI. In Equation 9, 'x' represents an index of a transport block TB.

와 같다.In Equation 9, O represents the number of bits of the CQI. L represents the number of bits of the CRC added to the CQI bit. In this case, L has a value of 0 when O is 11 bits or less, and 8 otherwise. In other words,

Same as

는 전송 블록에 따른 전송 코드 워드의 개수에 따라 결정되며, 데이터와 UCI간 SNR 차이를 고려하기 위한 오프셋값을 결정하기 위한 파라미터는

으로 정해진다.At this time,

Is determined according to the number of transmission codewords according to the transport block.

It is decided.

는 해당 서브프레임에 대한 부반송파의 개수를 나타내고, C ^{( χ )} 는 전송블록으로부터 생성되는 코드블록들의 총 개수를 나타내며,

는 인덱스 r에 따른 코드블록의 크기를 나타낸다.

에서 x는 상향링크 그랜트에 의해 지정된 MCS가 가장 높은 전송 블록의 인덱스를 나타낸다.

Denotes the number of subcarriers for the corresponding subframe, C ^{( χ )} denotes the total number of code blocks generated from a transport block,

Denotes the size of the code block according to the index r.

X denotes the index of the transport block with the highest MCS specified by the uplink grant.

, C ^{( χ )} ,및

값들을 S1910 단계에서 초기 PDCCH로부터 획득할 수 있다.At this time, the terminal

, C ^{( χ )} , and

The values may be obtained from the initial PDCCH in step S1910.

는 동일한 전송 블록을 위한 초기 PUSCH 전송 서브프레임 당 SC-FDMA 심볼의 개수를 나타낸다. 이때,

은 제1전송블록 및 제2전송블록에 대한 초기 PUSCH 전송을 위한 서브프레임 당 SC-FDMA 심볼들의 개수를 나타낸다.

Denotes the number of SC-FDMA symbols per initial PUSCH transmission subframe for the same transport block. At this time,

Denotes the number of SC-FDMA symbols per subframe for initial PUSCH transmission for the first transport block and the second transport block.

값은 다음 수학식 10을 이용하여 계산할 수 있다.In addition, the terminal

The value can be calculated using the following equation (10).

은 단말이 전송블록 'x' 의 초기 전송을 위한 동일 서브 프레임 내에서 PUSCH와 SRS를 전송하는 경우 또는 전송블록 'x' 의 초기 전송을 위한 PUSCH 자원 할당이 셀특정(cell-specific) SRS의 서브 프레임 및 주파수 대역폭과 부분적으로라도 겹치는 경우에 1로 설정될 수 있으며, 이외의 경우는 0으로 설정될 수 있다.In equation (10)

When the UE transmits the PUSCH and the SRS in the same subframe for the initial transmission of the transport block 'x' or PUSCH resource allocation for the initial transmission of the transport block 'x' is a sub-cell of the cell-specific SRS It may be set to 1 when partially overlapping with the frame and frequency bandwidth, and may be set to 0 otherwise.

는 전송 블록을 위한 현재 서브 프레임 내에서 PUSCH 전송을 위해 할당된(스케줄링된) 대역폭을 부반송파의 개수로 나타낸 것이다.

는 현재 PUSCH가 전송되는 서브 프레임 내에서 SC-FDMA 심볼의 개수를 나타낸다.In equation (9)

Denotes the number of subcarriers, the bandwidth allocated (scheduled) for PUSCH transmission in the current subframe for the transport block.

Denotes the number of SC-FDMA symbols in a subframe in which a current PUSCH is transmitted.

In Equation 9, the variable 'x' represents a transport block TB corresponding to the highest MCS level indicated by the initial UL grant. If two transport blocks have the same MCS level in the corresponding initial UL grant, x may be set to '1' indicating the first transport block.

Referring back to FIG. 19, the terminal may generate uplink control information (UCI, CSI, etc.) including the CQI using the number of REs calculated in step S1920. In this case, other UCI information except for the CQI may be calculated using Equations 1, 2, and 5-8 (S1930).

In addition, the UE may also calculate information G of uplink data (UL-SCH signal) transmitted through the PUSCH. That is, the terminal may calculate information on the uplink data to be transmitted together with the uplink control information calculated in step S1930. Thereafter, the terminal may transmit a PUSCH signal including the UCI and UL data to the base station (S1940).

In step S1940, the data information (G) bit of the UL-SCH may be calculated as in Equation 11 below.

은 x 번째 UL-SCH 전송블록에 대응되는 레이어의 개수를 나타낸다. 또한,

는 CQI의 부호화된 비트의 총 개수를 나타내며,

와 같다. 여기서,

은 각 전송블록에서 변조 차수(order)에 따른 심볼 당 비트 수로 QPSK인 경우 2, 16QAM인 경우 4, 64QAM인 경우 6과 같다. 또한, 상향링크 자원에서 RI를위한자원을우선적으로 할당하므로, 상향링크 데이터 정보(G) 비트에서RI에 할당된 자원 요소의 개수를 제외한다. RI가 전송되지 않으면,

과 같다.When the UE obtains the number of resource elements for the CQI (see Equation 9), the UE can obtain the number of bits after channel coding of the CQI in consideration of the modulation scheme for the CQI. In Equation (11)

Represents the number of layers corresponding to the x th UL-SCH transport block. Also,

Denotes the total number of coded bits of the CQI,

Same as here,

Is the number of bits per symbol according to the modulation order in each transport block, which is equal to 2 for QPSK, 4 for 16QAM, and 6 for 64QAM. In addition, since resources for RI are first allocated in the uplink resource, the number of resource elements allocated to the RI is excluded from the uplink data information (G) bit. If no RI is sent,

Is the same as

에서 CQI가 전송되는 TB(또는 CW)에 정의된 RI의 비트 수

를 CQI가 전송되는 TB(또는 CW)의 변조 차수

로 나눈 값을 제해 준 값이 된다(수학식 9 참조).In FIG. 19, the number of REs allocated to a CQI is obtained using parameters according to initial transmission of a TB (or CW) in which the CQI is transmitted, and the maximum value of the RE allocated is a total resource of the current subframe.

Number of bits of RI defined in TB (or CW) to which CQI is transmitted

Is the modulation order of TB (or CW) to which the CQI is transmitted.

This is the value divided by. (See Equation 9.)

20 is a diagram illustrating another one of methods of transmitting uplink control information according to an embodiment of the present invention.

Referring to FIG. 20, the base station eNB transmits a PDCCH to allocate downlink and uplink resources to the terminal (S2010).

The UE transmits uplink data and / or uplink control information (ie, CQI) to the base station through the PUSCH based on the control information included in the PDCCH (S2020).

At this time, when an error occurs in the PUSCH signal transmitted in step S2020, the base station transmits a NACK signal to the terminal (S2030).

When the UE receives the NACK signal, when the UE retransmits uplink data, the UE may calculate a resource for transmitting the uplink data and a resource for transmitting the uplink control information in the radio resource allocated thereto. Therefore, the terminal may calculate the number of REs for transmitting the UCI (S2040).

In step S2040, the CQI is spread by being transmitted to all layers belonging to a TB having a high MCS. In this case, if the MCS levels of the two TBs are the same, the CQI is preferably transmitted to the first TB. However, since the PUSCH signal needs to be retransmitted in step S2040, the size of the initial resource block (RB) set in each TB may be different. Accordingly, the terminal preferably obtains the number of REs for the CQI by the method described in Equation (9).

, C ^{( χ )} 및

값이 PDCCH 신호에 포함되는 경우에, 단말은 S2040 단계에서 해당 정보를 이용하여 CQI에 대한 RE의 개수를 구할 수 있다. 만약, S2030 단계 이후에

, C ^{( χ )} 및

값을 포함하는 PDCCH를 수신하는 경우에는, 단말은 해당 값을 이용하여 CQI에 대한 RE의 개수를 구할 수 있다.In addition, at the S2010 stage

, C ^{( χ )} and

If the value is included in the PDCCH signal, the UE can obtain the number of REs for the CQI using the corresponding information in step S2040. If after step S2030

, C ^{( χ )} and

When receiving a PDCCH including a value, the UE can obtain the number of REs for the CQI using the corresponding value.

Referring to FIG. 20, the terminal may generate uplink control information (UCI) by using the number of REs for the CQI obtained in step S2040. In this case, the UE can obtain the number of REs for HARQ-ACK and / or RI by the method described in Equations 6 and 7, and can generate the UCI using this (S2050).

In addition, the UE may calculate UL-SCH data information G for uplink data to be retransmitted. The UL-SCH data information G may be calculated using Equation 10. Therefore, when retransmitting uplink data, the uplink control information (UCI) may be multiplexed (or piggybacked) to the uplink data and transmitted to the base station (S2060).

3.6 Channel Coding

Hereinafter, a method of performing channel encoding on UCI based on the number of REs for each UCI value calculated using the aforementioned methods will be described.

로 나타낼 수 있으며, 다음 표 1과 같이 변조 차수에 따라 채널 부호화가 수행될 수 있다. Q_m은 변조 차수에 따른 심볼 당 비트 수로 QPSK, 16QAM, 64QAM에서 각각 2, 4, 6값을 가진다.If the information bit of ACK / NACK is 1 bit, the input sequence is

As shown in Table 1, channel encoding may be performed according to a modulation order. Q _m is the number of bits per symbol according to the modulation order and has 2, 4, and 6 values in QPSK, 16QAM, and 64QAM, respectively.

로 나타낼 수 있으며, 다음 표 2와 같이 변조 차수에 따라 채널 부호화가 수행될 수 있다. 이때,

는 코드 워드 0을 위한 ACK/NACK 비트이며,

는 코드 워드 1을 위한 ACK/NACK 비트이고,

이다. 표 1 및 표 2에서 x 및 y는 ACK/NACK 정보를 전달하는 변조 심볼의 유클리드 거리(Euclidean distance)를 최대화하기 위하여 ACK/NACK 정보를 스크램블하기 위한 플레이스 홀더(placeholder)를 의미한다.When the information bit of ACK / NACK is 2 bits

As shown in Table 2, channel encoding may be performed according to a modulation order. At this time,

Is the ACK / NACK bit for code word 0,

Is the ACK / NACK bit for code word 1,

to be. In Tables 1 and 2, x and y mean a placeholder for scrambled ACK / NACK information in order to maximize the Euclidean distance of a modulation symbol carrying ACK / NACK information.

는 다중의 부호화된 ACK/NACK 블록들의 결합(concatenation)으로 생성된다. 또한, TDD에서 ACK/NACK 번들링의 경우, 비트 시퀀스

도 다중의 부호화된 ACK/NACK 블록들의 결합(concatenation)으로 생성된다. 이때,

은 모든 부호화된 ACK/NACK 블록들에 대한 부호화된 비트의 총 개수이다. 부호화된 ACK/NACK 블록들의 마지막 결합은 총 비트 시퀀스의 길이가

와 같아지도록 부분적(partial)으로 구성될 수 있다.In case of ACK / NACK multiplexing in Frequency Division Duplex (FDD) or TDD, if ACK / NACK consists of 1 bit or 2 bits, a bit sequence

Is generated by concatenation of multiple coded ACK / NACK blocks. Also, in the case of ACK / NACK bundling in TDD, a bit sequence

Also generated by concatenation of multiple coded ACK / NACK blocks. At this time,

Is the total number of coded bits for all coded ACK / NACK blocks. The final combination of coded ACK / NACK blocks shows that the total length of the bit sequence

It can be configured partially to be equal to.

는 다음 표 3에서 선택될 수 있으며, 스크램블링 시퀀스를 선택하기 위한 인덱스 i는 다음 수학식 12로부터 계산될 수 있다.Scrambling sequence

May be selected from Table 3 below, and an index i for selecting a scrambling sequence may be calculated from Equation 12 below.

Table 3 is a scrambling sequence selection table for TDD ACK / NACK bundling.

가 생성된다. 이때, 비트 시퀀스

를 생성하는 알고리즘은 다음 표 4와 같다.When ACK / NACK is 1 bit, it is set to m = 1, and when ACK / NACK consists of 2 bits, it is set to m = 3 and it is a bit sequence.

Is generated. Bit sequence

The algorithm for generating is shown in Table 4 below.

이고, O ^ACK ＞2인 경우), 비트 시퀀스

는 다음 수학식 13으로부터 획득될 수 있다.HARQ-ACK information bit is more than 2 bits (that is,

, O ^ACK > 2), bit sequence

Can be obtained from the following equation (13).

으로 정의될 수 있다. 이때,

으로 계산될 수 있다.In Equation 13, i = 0, 1, 2,... , Q _ACK -1, and the base sequence M _{i, n} may refer to Table 5.2.2.6.4-1. Of the 3GPP TS36.212 standard document. The vector sequence output of channel coding for HARQ-ACK information is

It can be defined as. At this time,

It can be calculated as

를 생성하는 알고리즘은 다음 표 5와 같다.Bit sequence

The algorithm for generating is shown in Table 5 below.

로 나타낼 수 있으며, 다음 표 6과 같이 변조 차수에 따라 채널 부호화가 수행될 수 있다.If the information bit of RI is 1 bit, the input sequence is

As shown in Table 6, channel encoding may be performed according to a modulation order.

와 RI 매핑 관계는 다음 표 7과 같다.Q _m is the number of bits according to the modulation order and has 2, 4, and 6 values in QPSK, 16QAM, and 64QAM, respectively.

And RI mapping relationships are shown in Table 7 below.

로 나타낼 수 있으며, 다음 표 8과 같이 변조 차수에 따라 채널 부호화가 수행될 수 있다. 이때,

는 2 비트 입력의 최상위 비트(MSB: Most Significant Bit)이며,

는 2 비트 입력의 최하위 비트(LSB: Least Significant Bit)이고,

이다.If the information bits of the RI are 2 bits

As shown in Table 8, channel encoding may be performed according to a modulation order. At this time,

Is the most significant bit (MSB) of the 2-bit input,

Is the least significant bit (LSB) of the 2-bit input,

to be.

와 RI 매핑 관계의 일례를 나타낸다.Table 9 shows

And an example of the RI mapping relationship.

In Tables 6 and 8, x and y mean a placeholder for scrambled RI information in order to maximize the Euclidean distance of a modulation symbol carrying RI information.

는 다중의 부호화된 RI 블록들의 결합(concatenation)으로 생성된다. 이때,

은 모든 부호화된 RI 블록들에 대한 부호화된 비트의 총 개수이다. 부호화된 RI 블록들의 마지막 결합은 총 비트 시퀀스의 길이가

와 같아지도록 부분적(partial)으로 구성될 수 있다.Bit sequence

Is generated by concatenation of multiple coded RI blocks. At this time,

Is the total number of coded bits for all coded RI blocks. The final combination of coded RI blocks is the length of the total bit sequence

It can be configured partially to be equal to.

으로 정의된다. 이때,

이며, 벡터 출력 시퀀스는 다음 표 10과 같은 알고리즘으로 획득될 수 있다.The vector output sequence of the channel coding for RI is

Is defined. At this time,

The vector output sequence can be obtained by the algorithm shown in Table 10 below.

On the other hand, if the information bits of RI (or ACK / NACK) are 3 or more and 11 or less bits, RM (Reed-Muller) coding is applied earlier to generate a 32-bit output sequence. The RI (or ACK / NACK) blocks b ₀ , b ₁ , b ₂ , b ₃ ,..., B _{B −1} are calculated as in Equation 14 below. Where i = 0, 1, 2,... , B-1 and B = 32.

In Equation 14, i = 0, 1, 2,... , Q _RI -1, and the base sequence M _{i, n} may refer to Table 5.2.2.6.4-1. Of the 3GPP TS36.212 standard document.

4. Implement device

The apparatus described with reference to FIG. 21 is a means by which the methods described with reference to FIGS. 1 through 20 may be implemented.

A user equipment (UE) can operate as a transmitter in an uplink and as a receiver in a downlink. In addition, an e-Node B (eNB) may operate as a receiver in uplink and as a transmitter in downlink.

That is, the terminal and the base station may include a transmitting module (Tx module: 2140, 2150) and a receiving module (Rx module: 2150, 2170), respectively, to control the transmission and reception of information, data, and / or messages. , Antennas 2100 and 2110 for transmitting and receiving data and / or messages.

In addition, the terminal and the base station may each include a processor 2120 and 2130 for performing the above-described embodiments of the present invention, and memories 2180 and 2190 capable of temporarily or continuously storing the processing of the processor. Can be.

Embodiments of the present invention can be performed using the above-described components and functions of the terminal and the base station apparatus. In this case, the apparatus described with reference to FIG. 21 may further include the configuration of FIGS. 2 to 4, and preferably, the configuration of FIGS. 2 to 4 may be included in the processor.

The processor of the mobile station may receive the PDCCH signal by monitoring the search space. In particular, in case of the LTE-A terminal, blind decoding may be performed on the extended CSS to receive the PDCCH without blocking the PDCCH signal with another LTE terminal.

In particular, the processors 2120 and 2130 of the terminal may transmit uplink control information together to the base station when transmitting the PUSCH signal. That is, the processor of the terminal may calculate the number of resource elements (REs) for transmitting HARQ-ACK, CQI, RI, etc. using the method described in Equations 1 to 10. Accordingly, the terminal may generate the UCI using the calculated number of resource elements, piggyback on the uplink data (UL-SCH), and transmit the same to the base station.

The transmitting module and the receiving module included in the terminal and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission. Duplex) may perform packet scheduling and / or channel multiplexing. Also, the terminal and the base station of FIG. 21 may further include a low power RF / Intermediate Frequency (IF) module.

Meanwhile, in the present invention, the terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, an MBS. A Mobile Broadband System phone, a hand-held PC, a notebook PC, a smart phone, or a multi-mode multi-band (MM-MB) terminal may be used.

Here, the smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal that integrates data communication functions such as calendar management, fax transmission / reception, and Internet access, have. In addition, a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.

Embodiments of the invention may be implemented through various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

For a hardware implementation, the method according to embodiments of the present invention may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) , Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to embodiments of the present invention may be implemented in the form of a module, a procedure or a function for performing the functions or operations described above. For example, software code may be stored in the memory units 2180 and 2190 to be driven by the processors 2120 and 2130. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention. In addition, claims that do not have an explicit citation in the claims can be combined to form an embodiment or included as a new claim by amendment after the application.

Embodiments of the present invention can be applied to various radio access systems. Examples of various radio access systems include 3rd Generation Partnership Project (3GPP), 3GPP2 and / or IEEE 802.xx (Institute of Electrical and Electronic Engineers 802) systems. The embodiments of the present invention can be applied not only to the various wireless access systems described above, but also to all technical fields applying the various wireless access systems.

Claims (15)

In a method for transmitting channel quality control information using two transport blocks in a wireless access system supporting a hybrid automatic retransmission method (HARQ),
Receiving, by the terminal, a physical downlink control channel (PDCCH) signal including downlink control information (DCI);
The number of coding symbols required for transmitting the channel quality control information using the DCI (

Calculating; And
Transmitting the channel quality control information through a physical uplink shared channel (PUSCH) based on the number of encoded symbols;
The number of encoded symbols (

) Is the equation

Is calculated using
The DCI includes information on the number of subcarriers for the first transport block for transmitting the channel quality control information.

), Information on the number of code blocks associated with the first transport block ( C ^{( χ )} ) and information on the size of the code block (

),
X is an index for the two transport blocks. The method of claim 1,
Wherein the first transport block is a transport block having a higher modulation and coding scheme (MCS) level among the two transport blocks. The method of claim 1,
And when the modulation and coding scheme (MCS) levels of the two transport blocks are the same, the first transport block is the first transport block. The method of claim 1,
In the step of transmitting the channel quality control information,
And the terminal piggybacks and transmits the channel quality control information to uplink data retransmitted using the HARQ scheme. In claim 1,
The terminal further includes calculating information on the uplink data,
The information on the uplink data is represented by equation

Channel quality control information transmission method calculated using. In a method for receiving channel quality control information using two transport blocks in a wireless access system supporting a hybrid automatic retransmission method (HARQ),
Transmitting, by the base station, a physical downlink control channel (PDCCH) signal including downlink control information (DCI) to the terminal; And
Receiving the channel quality control information through a physical uplink shared channel (PUSCH) from the terminal,
The number of coding symbols necessary for transmitting the channel quality control information (

) Is the equation

Is calculated using
The DCI includes information on the number of subcarriers for the first transport block for transmitting the channel quality control information.

), Information on the number of code blocks associated with the first transport block ( C ^{( χ )} ) and information on the size of the code block (

),
X is an index for the two transport blocks. The method of claim 6,
And the first transport block is a transport block having a higher modulation and coding scheme (MCS) level among the two transport blocks. The method of claim 6,
And when the modulation and coding scheme (MCS) levels of the two transport blocks are the same, the first transport block is the first transport block. The method of claim 6,
In the step of receiving the channel quality control information,
The channel quality control information is piggybacked on uplink data retransmitted using the HARQ scheme. The method of claim 9,
The information on the uplink data is represented by equation

The channel quality control information receiving method calculated using. In a wireless access system supporting a hybrid automatic retransmission method (HARQ), a terminal for transmitting channel quality control information using two transport blocks,
A transmission module for transmitting a wireless signal;
A receiving module for receiving a wireless signal; And
Including a processor for supporting the transmission of the channel quality control information,
The terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI);
The number of coding symbols required for transmitting the channel quality control information using the DCI (

);
The channel quality control information is transmitted through a physical uplink shared channel (PUSCH) based on the number of encoded symbols.
The number of encoded symbols (

) Is the equation

Is calculated using
The DCI includes information on the number of subcarriers for the first transport block for transmitting the channel quality control information.

), Information on the number of code blocks associated with the first transport block ( C ^{( χ )} ) and information on the size of the code block (

),
X is an index for the two transport blocks. The method of claim 11,
The first transport block is a terminal of a higher modulation and coding scheme (MCS) level of the two transport blocks, the terminal. The method of claim 11,
The first transport block is a first transport block when the modulation and coding scheme (MCS) levels of the two transport blocks are the same. The method of claim 11,
And transmitting the channel quality control information by piggybacking on uplink data retransmitted using the HARQ scheme. 12. The method of claim 11,
Calculate information about the uplink data,
The information on the uplink data is represented by equation

Calculated using the terminal.

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