KR101923440B1 - Method and Apparatus for transmitting Channel Quality Control Information in wireless access system - Google Patents

Abstract

)를 계산하는 단계와 부호화 심볼의 개수를 기반으로 채널품질제어정보를 물리상향링크공유채널 (PUSCH)을 통해 전송하는 단계를 포함할 수 있다.The present invention relates to a method for transmitting channel quality control information using two transport blocks in a wireless access system supporting a hybrid automatic repeat request (HARQ). In one embodiment of the present invention, the method includes receiving a physical downlink control channel (PDCCH) signal including downlink control information (DCI), and transmitting the channel quality control information using a DCI The number of coded symbols (

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

Description

[0001] The present invention relates to a method and apparatus for transmitting channel quality control information in a wireless access system,

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

A 3GPP LTE system (hereinafter referred to as LTE system) is a multi-carrier modulation (MCM) system in which a single component carrier (CC) is divided into a plurality of bands for use in a 3GPP LTE (Relay- -Carrier Modulation) method is used. However, in the 3GPP LTE-Advanced system (hereinafter referred to as LTE-A system), a method such as Carrier Aggregation (CA: Carrier Aggregation) in which one or more component carriers are combined to support a system bandwidth of a broadband have. Carrier aggregation can be replaced by carrier matching, multi-component carrier environment (Multi-CC) or multi-carrier environment.

Only a case where uplink control information (UCI) and data are multiplexed using a plurality of layers on one CC in a single non-CC environment such as an LTE system is described have.

However, in a carrier aggregation environment, one or more CCs may be used, and the number of UCIs may be increased by a multiple of the number of CCs used. For example, rank indication information (RI: Rank Indication) information has an information size of 2 to 3 bits in the LTE system. However, in the LTE-A system, since the entire bandwidth can be extended to 5 CCs, the RI information can have information bit sizes up to 15 bits.

In this case, uplink control information of up to 15 bits can not be transmitted in the UCI transmission method defined in the LTE system, and it is impossible to encode even the conventional Reed-Muller (RM) code. Therefore, a new transmission method for UCI with large size information is needed in LTE-A system.

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 a carrier wave 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 a PUSCH.

It is still another object of the present invention to provide a method and apparatus for retransmitting uplink control information using two or more transport blocks (TBs), a resource element (RE) necessary for transmitting CQI and / or PMI, The number of which can be determined.

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.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. Lt; / RTI >

The present invention relates to a method and apparatus for transmitting uplink control information (UCI) including channel quality control information in a carrier wave environment.

)를 계산하는 단계와 부호화 심볼의 개수를 기반으로 채널품질제어정보를 물리상향링크공유채널 (PUSCH)을 통해 전송하는 단계를 포함할 수 있다.A method for transmitting channel quality control information using two transport blocks in a radio access system supporting a hybrid automatic retransmission scheme (HARQ) as an aspect of the present invention includes the steps of: Receiving a downlink control channel (PDCCH) signal and a number of coded symbols required to transmit channel quality control information using the DCI

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

)를 계산하고; 부호화 심볼의 개수를 기반으로 채널품질제어정보를 물리상향링크공유채널 (PUSCH)을 통해 전송할 수 있다.According to another aspect of the present invention, in a wireless access system supporting a hybrid automatic repeat request (HARQ), a terminal for transmitting channel quality control information using two transport blocks includes a transmission module for transmitting a radio signal; A receiving module for receiving a wireless signal; And a processor for supporting transmission of channel quality control information. At this time, the UE receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI); The number of coded symbols required to transmit channel quality control information using the DCI (

); And transmit channel quality control information on a physical uplink shared channel (PUSCH) based on the number of coded 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 expressed by the following equation

And the DCI includes information on the number of subcarriers for the first transmission block for transmitting the channel quality control information

Information on the number of code blocks related to the first transport block ( C ^{( x )} ), and information on the size of the code block (

) May be included. Here, 'x' represents an index for two transport blocks.

In the aspects of the present invention, the first transport block is preferably a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. However, if the modulation and coding scheme (MCS) level of the two transmission blocks is the same, the first transmission block may be the first one of the two transmission blocks.

In the step of transmitting the channel quality control information, the UE piggybacks on channel quality control information to uplink data to be retransmitted using the HARQ scheme.

을 이용하여 계산될 수 있다.At this time, the UE can further calculate the information on the uplink data, and the information on the uplink data is calculated by Equation

. ≪ / RTI >

According to another aspect of the present invention, there is provided a method of receiving channel quality control information using two transport blocks in a wireless access system supporting a hybrid automatic repeat request (HARQ) scheme, the method comprising: receiving, by a base station, downlink control information And transmitting the physical downlink control channel (PDCCH) signal, and receiving the channel quality control information through a Physical Uplink Shared Channel (PUSCH) from the UE.

)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 coded symbols required to transmit the channel quality control information (

) Is expressed by the following equation

And the DCI includes information on the number of subcarriers for the first transmission block for transmitting the channel quality control information

Information on the number of code blocks related to the first transport block ( C ^{( x )} ), and information on the size of the code block (

) May be included. Here, 'x' represents an index for two transport blocks.

In another aspect of the present invention, it is preferable that the first transport block is a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. However, if the modulation and coding scheme (MCS) level of the two transport blocks is the same, 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. At this time, the information on the uplink data is expressed by Equation

. ≪ / RTI >

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed and will become apparent to those skilled in the art from the following detailed description, Can be derived and understood based on the description.

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

First, uplink control information can be efficiently encoded and transmitted in a multi-carrier environment (or a carrier aggregation environment).

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

Thirdly, when the CQI is piggybacked to the PUSCH, the number of REs needed to transmit the CQI can be accurately calculated for each transport block. In particular, when the initial resource values of 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, undesirable effects of implementing the present invention can also be derived from those of ordinary skill in the art from the embodiments of the present invention.

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

Embodiments of the present invention provide methods and apparatus for transmitting and receiving uplink control information in a carrier aggregation environment (or multi-component carrier environment). Also disclosed are methods and apparatuses for transmitting and receiving Rank Indication (RI) information and methods and apparatus for applying error detection codes to uplink control information.

The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or characteristic may be considered optional unless otherwise expressly 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, there is no description of procedures or steps that may obscure the gist of the present invention, nor is any description of steps or steps that can be understood by those skilled in the art.

The embodiments of the present invention have been described herein with reference to a data transmission / reception relationship 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 herein as performed by the base station may be performed by an upper node of the base station, as the case may be.

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. At this time, 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 the 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, May be supported by the documents 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213 and 3GPP TS 36.321. 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 this document may be described by the 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 description is to be understood as illustrative and non-limiting, such as 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 And can be used in various wireless 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 wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).

UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is a part of E-UMTS (Evolved UMTS) using E-UTRA, adopting OFDMA in downlink and SC-FDMA in uplink. The LTE-A (Advanced) system is an improved 3GPP LTE system. In order to clarify the technical features of the present invention, the embodiments of the present invention are described mainly in the 3GPP LTE / LTE-A system, but can also be applied to the 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 a downlink (DL) and transmits information to a base station through an uplink (UL). The information transmitted and received between the base station and the terminal includes general data information and various control information, and there are various physical channels depending on the type / use of the information transmitted / received.

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

In step S101, the initial cell search operation such as synchronizing with the base station is performed. To this end, a mobile station receives a primary synchronization channel (P-SCH) and a secondary synchronization channel (S-SCH) from a base station, synchronizes with the base station, and acquires information such as a cell ID.

Then, the terminal can receive the physical broadcast channel (PBCH) signal from the base station and acquire the in-cell broadcast information. Meanwhile, the UE can receive the downlink reference signal (DL RS) in the initial cell search step to check the downlink channel state.

Upon completion of the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to physical downlink control channel information in step S102, System information can be obtained.

Thereafter, the terminal can perform a random access procedure such as steps S103 to S106 in order to complete the connection to the base station. To this end, the UE transmits a preamble (PRAM) through a physical random access channel (PRACH) (S103), and transmits a response message for a preamble through a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of a contention-based random access, the UE transmits a physical random access channel signal (S105) and a contention resolution process (Contention Resolution) such as a physical downlink control channel signal and a corresponding physical downlink shared channel signal Procedure can be performed.

The UE having performed the procedure described above transmits and receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S107) and a physical uplink shared channel (PUSCH: physical Or uplink shared channel (PUCCH) signals and / or physical uplink control channel (PUCCH) signals (S108).

Control information transmitted from the UE to the Node B is collectively referred to as uplink control information (UCI). The UCI includes HARQ-ACK / NACK (Hybrid Automatic Repeat and Request Acknowledgment / Negative-ACK), SR (Scheduling Request), CQI (Channel Quality Indication), PMI (Precoding Matrix Indication) .

In the LTE system, the UCI is periodically transmitted through the PUCCH in general, but may be transmitted through the PUSCH when the control information and the traffic data are to be simultaneously transmitted. In addition, UCI can be transmitted non-periodically through the PUSCH according to the request / instruction of the network.

2 is a diagram for explaining a structure of a UE and a signal processing process for transmitting an uplink signal by the UE.

In order to transmit the uplink signal, the scrambling module 210 of the UE may scramble the transmission signal using the UE-specific scrambling signal. The scrambled signal is input to the modulation mapper 220, and is used to perform BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), or 16QAM / 64QAM (Quadrature Amplitude Modulation) according to the type and / And is then modulated into a complex symbol. After the modulated complex symbols are processed by the transform precoder 230, they are input to the resource element mapper 240 and the resource element mapper 240 can map the complex symbols to the time-frequency resource elements. 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 for explaining one structure of a base station and a signal processing procedure for a base station to transmit a downlink signal.

In a 3GPP LTE system, a base station may transmit one or more codewords in the downlink. The codeword may be processed as a complex symbol through the scramble module 301 and the modulation mapper 302, respectively, as in the uplink of Fig. The complex symbols are then mapped to a plurality of layers by a layer mapper 303 and each layer may be multiplied by a precoding matrix by a precoding module 304 and assigned to each transmit antenna. The transmission signals for each antenna thus processed are mapped to time-frequency resource elements by the resource element mapper 305, and then transmitted through each antenna via an OFDM (Orthogonal Frequency Division Multiple Access) signal generator 306 .

In a wireless communication system, when a mobile station transmits a signal in an uplink, a peak-to-average ratio (PAPR) is more problematic than a case where a base station transmits a downlink signal. Therefore, unlike the OFDMA scheme used for downlink signal transmission, the uplink signal transmission uses a single carrier-frequency division multiple access (SC-FDMA) scheme as described above with reference to FIG. 2 and FIG.

4 is a diagram for explaining one structure of a UE, an SC-FDMA scheme and an OFDMA scheme.

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

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 allows the transmitted signal to have a single carrier property by canceling a portion of the IDFT processing impact of the M-point IDFT module 404.

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

5 (a) shows a localized mapping method, and FIG. 5 (b) shows a distributed mapping method. At this time, the clustered cluster, which is a modified form of the SC-FDMA, divides the DFT process output samples into sub-groups in the subcarrier mapping process and discretely maps them to the frequency domain (or subcarrier domain) do.

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

In the LTE standard (for example, 3GPP release 8), a data portion is converted by a DFT process into a frequency domain signal after a signal generated in the time domain, and then is subjected to IFFT processing after subcarrier mapping (see FIG. 4) Is defined to be generated by directly generating in the frequency domain without performing the DFT processing (S610), mapping it on a subcarrier (S620), and transmitting the IFFT processing (S630) and CP addition (S640).

7 is a diagram showing symbol positions where reference signals RS are mapped in a subframe structure according to the SC-FDMA scheme.

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

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

FIG. 8 shows 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. 9 shows a case where a signal is generated through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a situation where a component carrier is allocated contiguously in the frequency domain. FIG. 10 shows a case where a signal is generated through a plurality of IFFT blocks in a situation where a component carrier is allocated non-contiguously in the frequency domain.

11 is a diagram showing a signal processing process of segmented SC-FDMA.

Segment SC-FDMA is an extension of DFT spreading of existing SC-FDMA and frequency subcarrier mapping of IFFT as the number of IFFTs is the same as that of any number of DFTs, as the relationship structure between DFT and IFFT has a one- -FDMA or NxDFT-s-OFDMA. The present specification encompasses them as a segment SC-FDMA. Referring to FIG. 11, in order to mitigate a single carrier characteristic condition, the segment SC-FDMA groups all the time-domain modulation symbols into N groups (N is an integer larger than 1) and performs a DFT process on a group basis.

12 illustrates a structure of an uplink subframe that can be used in embodiments of the present invention.

Referring to FIG. 12, the uplink subframe includes a plurality of (e.g., two) slots. The slot may include a different number of SC-FDMA symbols according to a cyclic prefix (CP) length. For example, in the 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 where a PUSCH signal is transmitted and received and is used to transmit an uplink data signal such as voice. The control region is an area where PUCCH signals are transmitted and received, and is used to transmit uplink control information.

The PUCCH includes an RB pair (e.g., m = 0, 1, 2, 3) located at both ends of the data area on the frequency axis. The PUCCH is also comprised of pairs of RBs located at opposite ends of the frequency axis (e.g., RB pairs at positions that are frequency mirrored) and are hopped to the slot boundaries. The uplink control information (i.e., UCI) includes HARQ ACK / NACK, Channel Quality Information (CQI), Precoding Matrix Indicator (PMI), and Rank Indication do.

FIG. 13 illustrates processing of UL-SCH data and control information usable in the 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 for each transmission time interval (TTI).

Of the transport block it received from an upper layer bit _{α 0, α 1, α 2} , α 3, ..., parity bits to _{α A -1 p 0, p 1} , p 2, p 3, ..., p L _-1 is added. At this time, the size of the transport block is A and the number of parity bits is L = 24 bits. The input bit CRC is attached is _{b 0, b 1, b 2} , b 3, ..., can be represented as b _{B -1,} B is the number of bits of the transport block including a 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 a plurality of code blocks (CB) according to the TB size, Respectively. After splitting the code block and attaching the CRC,

Respectively. Where r is the number of the code block (r = 0, ..., C-1), and K _r is the number of bits along the code block r. Also, 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, the channel coding unit

A channel coding step is performed. The bits after channel encoding are

. Where i is the index of the encoded data stream ( i = 0, 1, 2) and D _r is the number of bits of the i th encoded data stream for code block r (i.e., D _r = K _r + ). r represents a code block number (r = 0,1, ..., C-1), and K _r represents the number of bits of the code block r. Also, C represents the total number of code blocks. In the embodiments of the present invention, each code block may be channel-encoded 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).After the channel encoding process, a rate matching step is performed. The bits after rate matching are

Respectively. Here, E _r denotes the number of rate matched bits of the _r -th code block, 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. The bits after the code block connection are f ₀ , f ₁ , f ₂ , f ₃ , ..., f _{G -1} . Here, G represents the total number of coded bits. However, when control information is multiplexed and transmitted together with UL-SCH data, bits used for control information transmission are not included in G. [ f ₀ , f ₁ , f ₂ , f ₃ , ..., f _{G -1} correspond to UL-SCH codewords (S1340).

Channel coding is performed independently for the channel quality information (CQI and / or PMI), the RI, and the HARQ-ACK, which are the uplink control information (UCI), respectively (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 the coded control information. The number of coded symbols corresponds to the number of modulation symbols, the number of REs, and the like in the following 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 performed using the o ₀ , o ₁ , o ₂ , ..., o _{O -1} input bit sequence (S1350). The output bit sequence of the channel coding for the channel quality information is

. The channel coding scheme to be applied depends on the number of bits of the channel quality information. When the channel quality information is 11 bits or more, 8 bits of CRC are added.

Represents the total number of coded bits for the CQI.

The encoded channel quality information may be rate-matched.

ego,

Is the number of coded symbols for the CQI,

Is an order of modulation.

Is set equal to the UL-SCH data.

또는

를 이용하여 수행된다(S1360).

와

는 각각 1-비트 RI와 2-비트 RI 를 의미한다.The channel coding of the RI is based on the input bit sequence

or

(S1360).

Wow

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 a 2-bit RI, the (3, 2) simplex code is used for encoding and the encoded data can be repeated cyclically. Further, for a RI of 3 to 11 bits or less, the (32, 0) RM code used in the uplink shared channel is used to encode RI information. For RIs of 12 bits or more, Group, and each group is encoded using the (32, 0) RM code. Output bit sequence

Is obtained by combining the encoded RI block (s). At this time,

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

, The last encoded RI block may be part of (i.e., rate matching).

ego,

Is the number of coded symbols for RI,

Is an order of modulation.

Is set equal to the 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 ).The channel coding of the HARQ-ACK is performed using the input bit sequence < RTI ID = 0.0 >

,

or

.

Wow

Bit HARQ-ACK and 2-bit HARQ-ACK, respectively. Also, Means an HARQ-ACK composed of two or more bits of information (i.e., 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.At this time, ACK is encoded as 1, and NACK is encoded 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 can be repeated cyclically. Further, for a HARQ-ACK of 3 to 11 bits or less, a (32, 0) RM code used in an uplink shared channel is used, and for a HARQ-ACK of 12 bits or more, The HARQ-ACK information is divided into two groups, and each group is encoded using the (32, 0) RM code.

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

Is obtained by combining the coded HARQ-ACK block (s). The length of the bit sequence is

, The last coded HARQ-ACK block to be combined may be a portion (i.e., rate matching).

ego,

Is the number of coded symbols for HARQ-ACK,

Is an order of modulation.

Is set equal to the 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 inputs of the data / control multiplexing block are f ₀ , f ₁ , f ₂ , f ₃ , ..., f _{G -1} , which signify encoded UL-SCH bits, and the encoded CQI /

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

to be.

Length

( I = 0, ..., H'- 1). At this time,

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

Column vector having a length.

ego,

to be. N _L denotes the number of layers to which the UL-SCH transport block is mapped, H denotes the number of coded bits allocated for UL-SCH data and CQI / PMI information in the N _L transport layers to which the transport block is mapped, . Here, 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 the coded bits input to the channel interleaver. At this time, the input of the channel interleaver is the output of the data / control multiplex block,

, An encoded 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

, I = 0, ..., H ' -1

).

Lt; RTI ID = 0.0 > ACK / NACK &

Lt; / RTI >

to be(

).

Length for RI

≪ / RTI >

to be(

).

The channel interleaver multiplexes control information and / or UL-SCH data for PUSCH transmission. Specifically, the channel interleaver includes 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.After channel interleaving is performed, a bit sequence from the channel interleaver matrix to the row-by-

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

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

When the UE desires to transmit control information in a subframe allocated with PUSCH transmission, the UE multiplexes the UL control information (UCI) and UL-SCH data 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 the CQI / PMI, ACK / NACK and RI transmissions depends on the modulation and coding scheme (MCS) and the offset value

,

,

). The offset value allows different coding rates according to the control information and is set semi-statically by an upper layer (e.g., RRC layer) signal. The UL-SCH data and control information are not mapped to the same RE. The control information is mapped to exist in both slots of the subframe. The base station can easily demultiplex control information and data packets because it can know in advance that the control information will be transmitted via the PUSCH.

14, the CQI and / or PMI (CQI / PMI) resources are located at the beginning of the UL-SCH data resource and sequentially mapped to all SC-FDMA symbols on one subcarrier, and then mapping is performed 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. The PUSCH data (UL-SCH data) is rate-matched considering the amount of CQI / PMI resources (i.e., the number of coded symbols). The same modulation order as the UL-SCH data is used for the CQI / PMI.

For example, when the CQI / PMI information size (payload size) is small (for example, 11 bits or less), (32, k) block codes are used in the CQI / PMI information similarly to the PUCCH data transmission, The data can be repeated cyclically. If the CQI / PMI information size 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 are performed using a tail-biting convolutional code . The ACK / NACK is inserted into a part of the resources of the SC-FDMA to which the UL-SCH data is mapped through puncturing. The ACK / NACK is located next to the RS and is filled in the corresponding SC-FDMA symbol starting from the bottom and upward, i.e., increasing the sub-carrier index.

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

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

Referring to FIG. 15, the UE identifies a rank (n_sch) for the UL-SCH (data part) and the associated PMI from the scheduling information for PUSCH transmission (S1510). In addition, the terminal determines a rank (n_ctrl) for UCI (S1520). The rank of the UCI may be set equal to the rank of the UL-SCH (n_ctrl = n_sch), although it is not limited thereto. Thereafter, data and a control channel are multiplexed (S1530). Thereafter, the channel interleaver performs time-priority mapping of the data / CQI and punctures the periphery of the DM-RS to map the ACK / NACK / RI (S1540). Thereafter, the data and the control channel are modulated according to the MCS table (S1550). The modulation scheme includes, for example, QPSK, 16QAM, and 64QAM. The order / position of the modulation block may be changed (e.g., before multiplexing of data and control channels).

16 and 17 are views showing an example of a method of multiplexing and transmitting uplink control information in a plurality of UL-SCH transmission blocks and a UE in a UE according to an embodiment of the present invention.

For convenience, FIGS. 16 and 17 assume the case where two codewords are transmitted, but FIGS. 16 and 17 can also be applied to one or more codeword transmissions. The codeword and transport block correspond to each other and are used interchangeably herein. Since the basic process is the same as or similar to that described with reference to FIGS. 13 and 14, a description will be given mainly to the portion related to MIMO.

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

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

Referring again to FIG. 16, control information such as CQI, RI, and ACK / NACK are channel-encoded in channel coding blocks 165 according to a given specification. At this time, the CQI, RI, and ACK / NACK may be encoded using the same channel code for all codewords, and may be encoded using different channel codes 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 control unit is scrambled (167). At this time, the scrambling may be performed cell-specific, layer-specific, codeword-specific, or UE-specific

The bit size control unit 166 may operate as follows.

(1) The bit size control unit recognizes the rank (n_rank_pusch) of the data with respect to the PUSCH.

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

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

Alternatively, a circular buffer scheme may be applied so that the number of extended bits (n_ext_ctrl) is 8 bits as described above.

When the bit size control unit 166 and the channel encoding unit 165 are configured as one unit, the encoded bits can be generated by applying channel coding and rate matching defined in the existing system (for example, LTE Rel-8) have.

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

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

The DFT precoder 170 performs DFT precoding. The MIMO precoder 171 performs MIMO precoding. 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 positions shown in Fig. 16, and their positions 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 all the multi-carrier supporting environments. That is, the multi-carrier system or the carrier aggregation system used in the present invention refers to a multi-carrier system or a carrier aggregation system in which one or more components having a bandwidth smaller than a target bandwidth when a target wide- And a carrier (CC) is used for aggregation.

In the present invention, a multicarrier refers to the aggregation of carriers (or carrier coupling). In this case, carrier aggregation means not only the coupling between adjacent carriers but also the coupling between non-adjacent carriers. Further, the carrier coupling can be used in combination with terms such as carrier aggregation, bandwidth coupling, and the like.

A multicarrier (i.e., carrier aggregation) in which two or more component carriers (CC) are combined is aimed at supporting up to 100 MHz bandwidth in the LTE-A system. When combining one or more carriers with a bandwidth smaller than the target bandwidth, the bandwidth of the combining carrier can be limited to the bandwidth used in the existing system to maintain backward compatibility with the existing IMT system.

For example, in the existing 3GPP LTE system, {1.4, 3, 5, 10, 15, 20} MHz bandwidth is supported and in the 3GPP LTE_advanced system (i.e. LTE_A) It can support a large bandwidth. In addition, the multicarrier system used in the present invention may define a new bandwidth to support carrier coupling (i.e., carrier aggregation, etc.) 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 a downlink resource and an uplink resource, and an uplink resource is not essential. Therefore, the cell can be composed of downlink resources alone or downlink resources and uplink resources. The linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource, if multi-carrier (i.e., carrier merging or carrier aggregation) Information (SIB).

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

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

P-cells and S-cells can be used as serving cells. For a UE that is in the RRC_CONNECTED state but no carrier merge has been set or does not support carrier merging, there is only one serving cell consisting of only P cells. On the other hand, in the case of the UE in the RRC_CONNECTED state and the merge of the carriers, there may be one or more serving cells, and the entire serving cell includes the P cell and one or more S cells.

After the initial security activation process is started, the E-UTRAN may configure a network including one or more S cells in addition to the P cell initially configured in the connection establishment process. In a multi-carrier environment, P-cells and S-cells can operate as respective component carriers (CCs). That is, multi-carrier aggregation can be understood as a combination of P-cell and one or more S-cells. In the following embodiments, the primary component carrier (PCC) may be used in the same sense as the P cell, and the secondary component carrier (SCC) may be used in the same meaning as the S cell.

3. Uplink control information transmission method

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

3.1 UCI assignment position on PUSCH

18 is a diagram showing one of methods for mapping physical resource elements to transmit uplink data and uplink control information (UCI).

18 shows a method of transmitting UCI in case of two codewords and four layers. In this case, the CQI is mapped to the RE by using the same modulation order as the data and the constellation points of all the constellation points except the RE to which the RI is mapped in the time priority mapping scheme. In the case of SU-MIMO, the CQI is spread and transmitted in one codeword. For example, a CQI is transmitted in a codeword having a high MCS level among two codewords, and is transmitted in a codeword 0 when the MCS level is the same.

Also, the ACK / NACK is arranged while puncturing the combination of the data and the CQI already mapped to the symbols located on both sides of the reference signal. Since the reference signals are located in the 3 < th > and 10 < th > symbols, they are mapped starting from the lowest subcarrier of the 2 < nd > In this case, the ACK / NACK symbols are mapped in order of 2, 11, 9, and 4 symbols.

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

In particular, ACK / NACK and RI are mapped in the same manner as QPSK using only four corners of the constellation diagram when the size of the information bit is 1 bit or 2 bits, and for the information bits of 3 bits or more, Can be mapped using all constellations of degree. In addition, ACK / NACK and RI transmit the same information using the same resources at the same position in all layers.

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

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

Control information or control data is input in the form of channel quality information (CQI and / or PMI), HARQ-ACK and RI in a channel coding block (e.g., S1350, S1360, S1370 or FIG. . Different numbers of coded symbols are allocated for the transmission of the control information so that 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 HARQ-ACK, RI and CQI (or PMI) which are the uplink channel state information (CSI) , o _o-1 are performed independently of each other.

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 can 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) depends on the number of coded modulation symbols

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

,

Are determined according to the number of transmission codewords according to the transport block, respectively. At this time, parameters for setting an offset value for considering SNR difference between data and UCI are

,

.

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.

Represents the number of subcarriers allocated (scheduled) for the 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,

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

Can be calculated by the following equation (2).

Here, N _SRS indicates that the UE transmits PUSCH and SRS in the same subframe for the initial transmission or PUSCH resource allocation for the initial transmission partially overlaps the subframe and frequency bandwidth of the cell-specific SRS , And may be set to 0 in other cases.

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

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

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

May be obtained from the 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

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. Alternatively, when the PUSCH is initialized by a random access response grant, it can be determined from the 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 ACK / NACK (or RI) channel coding can be obtained in consideration of the modulation scheme. The total number of coded bits of ACK / NACK is

, The total number of coded bits of RI is

. here,

Is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM, depending on the order of modulation.

On the other hand, when SNR or spectral efficiency is high, rate matching works as puncturing to prevent the minimum distance of a codeword encoded through RM (Reed-Muller) code from becoming zero, / NACK and the minimum value of the resource element allocated to RI. At this time, the minimum value of the defined resource element may have another 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 can be calculated according to Equation (3).

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

) Hereinafter, the CQI is mainly described, but the same can be applied to the PMI.

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

.

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 transmission block, and a parameter for determining an offset value for considering the SNR difference between data and UCI is

.

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.

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

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

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,

Represents the number of subcarriers for the corresponding subframe.

X represents the index of the transport block having 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 the initial PDCCH for the same transport block.

, C and

If the value is not included in the initial PDCCH (DCI Format 0), the terminal may determine the values in a different manner.

, 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 in the initial transmission is semi-persistent scheduling, the most recently received from the semi-static scheduling assignment PDCCH

, C and

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

, C and

Values can be determined.

The data information (G) bits of the UL-SCH can be calculated by Equation (4).

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.If the number of resource elements for the CQI is obtained as described above, the number of bits after the channel coding of the CQI can be obtained in consideration of the modulation scheme.

Represents the total number of coded bits of the CQI,

. here,

Is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM, depending on the order of modulation. It excludes the number of resource elements allocated to RI because it allocates resources for RI first. If the RI is not sent,

Respectively.

3.4 Number of coded modulation symbols for HARQ-ACK bit or RI-2

Hereinafter, methods for obtaining ACK / NACK and the number of resource elements (REs) used in RI different from those described in the 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 an HARQ-ACK bit or an RI bit in a single cell, the UE calculates the number of modulation symbols per layer for HARQ-ACK or RI

. Equation (5) is used to find the number of modulation symbols when only one transport block is transmitted in the 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) depends on the number of coded modulation symbols

) Where O denotes 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.

,

Are determined according to the number of transmission codewords according to the transport block, respectively. At this time, parameters for setting an offset value for considering SNR difference between data and UCI are

,

.

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.

Represents the number of subcarriers allocated (scheduled) for the 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,

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

Can be calculated as shown in Equation (2).

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

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

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

May be obtained from the 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

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. Alternatively, when the PUSCH is initialized by a random access response grant, it can be determined from the 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 desires to transmit two transport blocks in the UL cell, the UE transmits the number of modulation symbols per layer for HARQ-ACK or RI

. Equations (6) and (7) are used to find the number of modulation symbols when the initial transmission resource values of 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) depends on the number of coded modulation symbols

). Here, O represents the number of bits of ACK / NACK (or RI). _{& Lt} ; / _RTI & _gt ;

If

, Otherwise

to be.

Represents the modulation order of the transmission block 'x'

Represents the scheduled bandwidth expressed as the number of sub-carriers for the PUSCH transmission in the initial sub-frame 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,

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

Can be calculated from the following equation (8).

은 1이고, 그렇지 않으면

은 0이다.In Equation (8), when the UE transmits PUSCH and SRS in the same subframe for the initial transmission for the transport block 'x', or when the PUSCH resource allocation for the initial transmission of the transport block 'x' 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,

, C , and

The values may 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

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

, C , and

The values may be determined from the 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)

,

Are determined according to the number of transmission codewords according to the transport block, respectively. At this time, parameters for setting an offset value for considering SNR difference between data and UCI are

,

.

3.5 Calculation of Number of 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 must calculate the number of resource elements for CQI and / or PMI per layer. Hereinafter, the channel quality control information will be described mainly with reference to the CQI, but this description can be equally applied to the PMI.

19 is a diagram illustrating one of methods for transmitting uplink control information as an embodiment of the present invention.

Referring to FIG. 19, the eNB may transmit an initial PDCCH (initial PDCCH) signal including DCI format 0 or DCI format 4 to the 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 on the number of code blocks ( C ^{( x )} ), and information on the size of the code block (

) 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 ^{( x )} and

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

, 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 in the initial transmission is semi-persistent scheduling, the most recently received from the semi-static scheduling assignment PDCCH

, C ^{( x )} and

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

, C ^{( x )} and

Values can be determined.

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

In the embodiments of the present invention, in the case of CQI / PMI, spreading or multiplexing is performed on all layers belonging to the TB having a high MCS. If the MCS levels of the two transport blocks TB are the same, the CQI is transmitted to the first TB in principle.

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

Can be calculated by the following equation (9).

Equation (9) is calculated in a manner similar to Equation (3). Equation (3) can not be used when the initial RB size of the TB to which the retransmission packet is transmitted is different when retransmitting UL data and / or UCI. That is, Equation (9) can be applied to a case where a PUSCH is transmitted using one or more TBs in a multi-carrier 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 determined by the number of coded modulation symbols

) Hereinafter, the CQI is mainly described, but the same can be applied to the PMI. In Equation (9), 'x' represents the index of the transport block (TB).

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

.

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 transmission block, and a parameter for determining an offset value for considering the SNR difference between data and UCI is

.

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 total number of code blocks generated from the transport block, and C ^{( x )} denotes the total number of code blocks generated from the transport block,

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

X represents the index of the transport block having the highest MCS specified by the uplink grant.

, C ^{( χ )} ,및

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

, C ^{( x )} , and

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.

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

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

값은 다음 수학식 10을 이용하여 계산할 수 있다.Also,

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 when the PUSCH resource allocation for the initial transmission of the transport block 'x' is the cell-specific SRS It can be set to 1 if it partially overlaps with the frame and frequency bandwidth, and can 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)

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

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

The variable 'x' in Equation (9) represents the 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 again to FIG. 19, the UE can generate uplink control information (UCI, CSI, etc.) including CQI using the number of REs calculated in step S 1920. At this time, the UCI information other than the CQI can be calculated using Equations 1, 2, and 5-8 (S1930).

In addition, the UE can also calculate the information (G) of the UL data (UL-SCH signal) transmitted through the PUSCH. That is, the UE can calculate 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 UCI and UL data to the base station (S1940).

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

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.If the number of resource elements for the CQI is found (see Equation (9)), the UE can obtain the number of bits after channel coding the CQI considering the modulation scheme for the CQI. In Equation (11)

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

Represents the total number of coded bits of the CQI,

. here,

Is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM as the number of bits per symbol according to the modulation order in each transport block. Also, since the resource for RI is preferentially allocated in the uplink resource, the number of resource elements allocated to RI is excluded from the uplink data information (G) bit. If the RI is not sent,

Respectively.

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 the CQI is obtained by using parameters related to the initial transmission of the TB (or CW) to which the CQI is transmitted. The maximum value of the RE allocated is the total resource of the current subframe

The number of bits of the RI defined in the TB (or CW) to which the CQI is transmitted

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

(See equation (9)).

20 is a diagram illustrating another method of transmitting uplink control information as an embodiment of the present invention.

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

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

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

When receiving a NACK signal, the UE may calculate a resource for transmitting uplink data and a resource for transmitting uplink control information in a radio resource allocated to the UE, in case of retransmitting the uplink data. Accordingly, the UE can calculate the number of REs for transmitting the UCI (S2040).

In step S2040, the CQI is spread and transmitted to all layers belonging to the transport block TB having a high MCS. At this time, 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 is retransmitted in step S2040, the size of the initial resource block (RB) set in each TB may be different. Therefore, the UE desirably obtains the number of REs for the CQI using 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.Also, in step S2010

, C ^{( x )} and

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 ^{( x )} and

, The UE can obtain the number of REs for the CQI using the corresponding value.

Referring to FIG. 20, the UE can generate uplink control information (UCI) by using the number of REs for the CQI obtained in step S2040. At this time, the UE can calculate the number of REs for HARQ-ACK and / or RI using the method disclosed in Equation (6) and Equation (7).

In addition, the UE can calculate UL-SCH data information G for uplink data to be retransmitted. UL-SCH data information G can be calculated using Equation (10). Therefore, when retransmitting the 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 coding for UCI based on the number of REs for each UCI value calculated using the above-described 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.When the information bit of ACK / NACK is 1 bit, the input sequence is

And channel coding can be performed according to the modulation order as shown in Table 1 below. Q _m is the number of bits per symbol according to modulation order, and has values of 2, 4, and 6 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

And channel coding can be performed according to the modulation order as shown in Table 2 below. At this time,

Is an ACK / NACK bit for codeword 0,

Is the ACK / NACK bit for codeword 1,

to be. In Table 1 and Table 2, x and y mean placeholders for scrambling ACK / NACK information to maximize the Euclidean distance of the modulation symbols 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,

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

Is 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 is the sum of the length of the total bit sequence

And the like.

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

Can be selected from the following Table 3, and the index i for selecting the scrambling sequence can be calculated from the following equation (12).

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.M = 1 if ACK / NACK is 1 bit and m = 3 if ACK / NACK consists of 2 bits,

Is generated. At this time,

Is shown in Table 4 below.

이고, O ^ACK ＞2인 경우), 비트 시퀀스

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

And O ^{ACK &} gt; 2), the 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 basic sequence Mi _{, n} may refer to Table 5.2.2.6.4-1. Of the 3GPP TS36.212 standard document. The vector sequence output of the channel coding for the HARQ-ACK information is

. ≪ / RTI > At this time,

. ≪ / RTI >

를 생성하는 알고리즘은 다음 표 5와 같다.At this time,

Is shown in Table 5 below.

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

And channel coding can be performed according to the modulation order as shown in Table 6 below.

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

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.When the information bit of RI is 2 bits

And the channel coding can be performed according to the modulation order as shown in Table 8 below. At this time,

Is the MSB (Most Significant Bit) of the 2-bit input,

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

to be.

와 RI 매핑 관계의 일례를 나타낸다.Table 9

And an RI mapping relationship.

In Table 6 and Table 8, x and y mean placeholders for scrambling the RI information to maximize the Euclidean distance of modulation symbols 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 sum of the length of the total bit sequence

And the like.

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

. At this time,

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

On the other hand, if the correct bit of the RI (or ACK / NACK) is 3 bits or more and 11 bits or less, RM (Reed-Muller) coding is applied to generate a 32-bit output sequence. the RI (or ACK / NACK) block _{b 0, b 1, b 2} , b 3, ..., b b -1 , is calculated by the following equation (14). Here, i = 0, 1, 2, ... , B-1, and B = 32.

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

4. Implementation device

The apparatus described in Fig. 21 is a means by which the methods described in Figs. 1 to 20 can be implemented.

A user equipment (UE) can operate as a transmitter in an uplink and as a receiver in a downlink. Also, the eNB (eNB) can operate as a receiver in an uplink and operate as a transmitter in a downlink.

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

The terminal and the base station respectively include a processor 2120 and 2130 for performing the embodiments of the present invention and memories 2180 and 2190 for temporarily or continuously storing the processing of the processor .

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 illustrated in FIG. 21 may further include the configurations of FIGS. 2 to 4, and preferably the configurations of FIG. 2 to FIG. 4 may be included in the processor.

The processor of the mobile terminal can receive the PDCCH signal by monitoring the search space. In particular, in the case of the LTE-A terminal, blind decoding (BD) is performed on the extended CSS, so that the PDCCH can be received without blocking the PDCCH signal with other LTE terminals.

In particular, the processors 2120 and 2130 of the UE may transmit the uplink control information to the BS together with the PUSCH signal. That is, the processor of the UE can calculate the number of resource elements RE for transmitting HARQ-ACK, CQI, RI, etc. using the method described in Equations (1) to (10). Accordingly, the UE generates UCI using the calculated number of resource elements, piggybacks it on uplink data (UL-SCH), and transmits it to the base station.

A transmission module and a reception module included in a terminal and a base station can be classified into a packet modulation and demodulation function for data transmission, a fast packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, a time division duplex (TDD) Duplex) packet scheduling and / or channel multiplexing functions. In addition, the terminal and the base station in FIG. 21 may further include a low-power RF (Radio Frequency) / IF (Intermediate Frequency) module.

In the present invention, a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a global system for mobile (GSM) phone, a wideband CDMA A handheld PC, a notebook PC, a smart phone or a multi-mode multi-band (MM) 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, the multimode multiband terminal can operate both in a portable Internet system and other mobile communication systems (for example, Code Division Multiple Access (CDMA) 2000 system, WCDMA (Wideband CDMA) system, etc.) .

Embodiments of the present invention may be implemented by 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, the software code may be stored in memory units 2180, 2190 and driven by processors 2120, 2130. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various means already known.

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

Embodiments of the present invention can be applied to various radio access systems. Examples of various wireless access systems include 3GPP (3rd Generation Partnership Project), 3GPP2 and / or IEEE 802.xx (Institute of Electrical and Electronic Engineers 802) systems, and the like. 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 (20)

A method for transmitting channel quality control information in a wireless access system supporting a hybrid automatic repeat request (HARQ)
The UE comprises: receiving a physical downlink control channel (PDCCH) including downlink control information (DCI);
The number of coded symbols required to transmit the channel quality control information using the DCI

); And
And transmitting the channel quality control information on a physical uplink shared channel (PUSCH) to which the HARQ is applied based on the number of the coded symbols,
Wherein the channel quality control information is transmitted on the PUSCH using one of two transport blocks,
The number of coded symbols (

) Is expressed by the following equation

, ≪ / RTI >

Indicates information on the number of subcarriers for transmitting the channel quality control information,
C ^(x) represents the number of code blocks associated with the transport block indicated by 'x' among the two transport blocks,

Represents the size of the code blocks,

Denotes the number of SC-FDMA symbols for the initial PUSCH transmission,
'x' represents an index of one of the two transport blocks,
'O' represents the number of bits of the channel quality control information,
'L' denotes the number of bits of a cyclic redundancy check (CRC) added to the channel quality control information,

ego,

Is determined on the basis of the number of transport blocks for the corresponding PUSCH and a parameter for determining an offset value for considering the difference between the uplink data and the uplink control information (UCI) SNR,

Represents the bandwidth scheduled for transmission of the PUSCH in the current subframe as the number of subcarriers,

Denotes the number of symbols in the current subframe,

Represents the number of bits per modulation order in each of the two transport blocks,

Represents the number of bits of the rank indicator defined in each of the two transport blocks. The method according to claim 1,
Wherein one of the two transport blocks is a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. The method according to claim 1,
Wherein one of the two transport blocks is a first transport block when the modulation and coding scheme (MCS) level of the two transport blocks is the same. The method according to claim 1,
In the step of transmitting the channel quality control information,
Wherein the terminal piggybacks the channel quality control information on uplink data retransmitted using the HARQ scheme, and transmits the channel quality control information. 5. The method of claim 4,
Wherein the terminal further comprises calculating information on the uplink data,
The information on the uplink data is expressed by Equation

, ≪ / RTI >

Represents the number of layers corresponding to the x-th transport block,

Is a total number of coded bits of the channel quality control information. A method for receiving channel quality control information in a wireless access system supporting a hybrid automatic repeat request (HARQ)
The base station transmitting a physical downlink control channel (PDCCH) including downlink control information (DCI) to the mobile station; And
And receiving the channel quality control information from the MS through a Physical Uplink Shared Channel (PUSCH) to which the HARQ is applied,
The channel quality control information is received via the genital PUSCH using one of the two transport blocks,
The number of coded symbols required to transmit the channel quality control information (

) Is expressed by the following equation

, ≪ / RTI >

Indicates information on the number of subcarriers for transmitting the channel quality control information,
C ^(x) represents the number of code blocks associated with the transport block indicated by 'x' among the two transport blocks,

Represents the size of the code blocks,

Denotes the number of SC-FDMA symbols for the initial PUSCH transmission,
'x' represents an index of one of the two transport blocks,
'O' represents the number of bits of the channel quality control information,
'L' denotes the number of bits of a cyclic redundancy check (CRC) added to the channel quality control information,

ego,

Is determined on the basis of the number of transport blocks for the corresponding PUSCH and a parameter for determining an offset value for considering the difference between the uplink data and the uplink control information (UCI) SNR,

Represents the bandwidth scheduled for transmission of the PUSCH in the current subframe as the number of subcarriers,

Denotes the number of symbols in the current subframe,

Represents the number of bits per modulation order in each of the two transport blocks,

Represents the number of bits of the rank indicator defined in each of the two transport blocks. The method according to claim 6,
Wherein one of the two transport blocks is a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. The method according to claim 6,
Wherein one of the two transport blocks is a first transport block when the modulation and coding scheme (MCS) level of the two transport blocks is the same. The method according to claim 6,
In receiving the channel quality control information,
Wherein 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 expressed by Equation

, ≪ / RTI >

Represents the number of layers corresponding to the x-th transport block,

Represents the total number of coded bits of the channel quality control information. A terminal that transmits channel quality control information in a wireless access system supporting a hybrid automatic repeat request (HARQ)
Transmitting module;
Receiving module; And
And a processor for supporting transmission of the channel quality control information,
The processor comprising:
(PDCCH) including downlink control information (DCI) by controlling the receiving module,
The number of coded symbols required to transmit the channel quality control information using the DCI

),
Controlling the transmission module to transmit the channel quality control information on a Physical Uplink Shared Channel (PUSCH) to which the HARQ is applied based on the number of the coded symbols,
Wherein the channel quality control information is transmitted on the PUSCH using one of two transport blocks,
The number of coded symbols (

) Is expressed by the following equation

, ≪ / RTI >

Indicates information on the number of subcarriers for transmitting the channel quality control information,
C ^(x) represents the number of code blocks associated with the transport block indicated by 'x' among the two transport blocks,

Represents the size of the code blocks,
Denotes the number of SC-FDMA symbols for the initial PUSCH transmission,
'x' represents an index of one of the two transport blocks,
'O' represents the number of bits of the channel quality control information,
'L' denotes the number of bits of a cyclic redundancy check (CRC) added to the channel quality control information,

ego,

Is determined on the basis of the number of transport blocks for the corresponding PUSCH and a parameter for determining an offset value for considering the difference between the uplink data and the uplink control information (UCI) SNR,

Represents the bandwidth scheduled for transmission of the PUSCH in the current subframe as the number of subcarriers,

Denotes the number of symbols in the current subframe,

Represents the number of bits per modulation order in each of the two transport blocks,

Represents the number of bits of the rank indicator defined in each of the two transport blocks. 12. The method of claim 11,
Wherein one of the two transport blocks is a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. 12. The method of claim 11,
Wherein one of the two transport blocks is a first transport block when the modulation and coding scheme (MCS) level of the two transport blocks is the same. 12. The method of claim 11,
And piggybacks the channel quality control information on uplink data retransmitted using the HARQ scheme. The method of claim 14,
Calculating information on the uplink data,
The information on the uplink data is expressed by Equation

, ≪ / RTI >

Represents the number of layers corresponding to the x-th transport block,

Represents the total number of coded bits of the channel quality control information. A base station receiving channel quality control information in a radio access system supporting a hybrid automatic repeat request (HARQ)
Transmitting module;
Receiving module; And
And a processor for supporting reception of the channel quality control information,
The processor comprising:
A physical downlink control channel (PDCCH) including downlink control information (DCI) is transmitted to the mobile station by controlling the transmission module,
And receiving the channel quality control information through a Physical Uplink Shared Channel (PUSCH) to which the HARQ is applied from the MS by controlling the reception module,
The channel quality control information is received via the genital PUSCH using one of the two transport blocks,
The number of coded symbols required to transmit the channel quality control information (

) Is expressed by the following equation

, ≪ / RTI >

Indicates information on the number of subcarriers for transmitting the channel quality control information,
C ^(x) represents the number of code blocks associated with the transport block indicated by 'x' among the two transport blocks,

Represents the size of the code blocks,

Denotes the number of SC-FDMA symbols for the initial PUSCH transmission,
'x' represents an index of one of the two transport blocks,
'O' represents the number of bits of the channel quality control information,
'L' denotes the number of bits of a cyclic redundancy check (CRC) added to the channel quality control information,

ego,

Is determined on the basis of the number of transport blocks for the corresponding PUSCH and a parameter for determining an offset value for considering the difference between the uplink data and the uplink control information (UCI) SNR,

Represents the bandwidth scheduled for transmission of the PUSCH in the current subframe as the number of subcarriers,

Denotes the number of symbols in the current subframe,

Represents the number of bits per modulation order in each of the two transport blocks,

Represents the number of bits of the rank indicator defined in each of the two transport blocks. 17. The method of claim 16,
Wherein one of the two transport blocks is a transport block having a high modulation and coding scheme (MCS) level among the two transport blocks. 17. The method of claim 16,
Wherein one of the two transport blocks is a first transport block when the modulation and coding scheme (MCS) level of the two transport blocks is the same. 17. The method of claim 16,
In receiving the channel quality control information,
Wherein the channel quality control information is piggybacked on uplink data retransmitted using the HARQ scheme. 20. The method of claim 19,
The information on the uplink data is expressed by Equation

, ≪ / RTI >

Represents the number of layers corresponding to the x-th transport block,

Represents the total number of coded bits of the channel quality control information.

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