WO2011162482A2 - Method and apparatus for transmitting control information in wireless communication system - Google Patents

Abstract

The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus therefor including the steps of: generating the control information; selecting a particular PUCCH format from a plurality of PUCCH formats; and transmitting the control information through the particular PUCCH format.

Description

 【Specification】

 [Name of invention]

 Method and apparatus for transmitting control information in wireless communication system

 Technical Field

 The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting control information. The wireless communication system can support carrier aggregation (CA).

 Background Art

 Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data. In general, a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (0FDMA) systems, and single carrier (SC-FDMA) systems. frequency division multiple access) systems.

 [Detailed Description of the Invention]

 [Technical problem]

 An object of the present invention is to provide a method and an apparatus therefor for efficiently transmitting control information in a wireless communication system. Another object of the present invention is to provide a channel format, signal processing, and an apparatus therefor for efficiently transmitting control information. It is still another object of the present invention to provide a method for efficiently allocating resources for transmitting control information and an apparatus therefor.

Technical problems to be achieved in the present invention are not limited to the above technical problems, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. Technical Solution According to an aspect of the present invention, a method for transmitting control information through a physical uplink control channel (PUCCH) by a terminal in a wireless communication system, the method comprising: generating the control information; Selecting a specific PUCCH format from the plurality of PUCCH formats; And transmitting the control information through the specific PUCCH format.

 In another aspect of the present invention, a terminal configured to transmit control information through a physical uplink control channel (PUCCH) in a wireless communication system, the terminal comprising: a radio frequency (RF) unit; And a processor, wherein the processor is configured to generate the control information, select a specific PUCCH format from a plurality of PUCCH formats, and transmit the control information through the specific PUCCH format.

 Here, the specific PUCCH format may be indicated by higher layer signaling.

 Here, the specific PUCCH format may be selected based on the number of component carriers configured for the terminal.

Here, the specific PUCCH format may be selected based on the number of bits of the control information. ^'

 Here, the control information includes two or more kinds of control information, and the specific PUCCH format may be selected based on a combination of control information constituting the control information.

 Advantageous Effects

 According to the present invention, control information can be efficiently transmitted in a wireless communication system. In addition, it is possible to provide a channel format and a signal processing method for efficiently transmitting control information. In addition, it is possible to efficiently allocate resources for transmission of control information. Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

[Brief Description of Drawings] BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide examples of the present invention and together with the description, describe the technical mapping of the present invention.

 1 illustrates physical channels used in a 3GPP LTE system, which is an example of a wireless communication system, and a general signal transmission method using the same.

 2 illustrates an uplink signal processing procedure.

 3 illustrates a downlink signal processing process.

 4 illustrates the SC-FDMA scheme and the 0FDMA scheme.

 5 illustrates a signal mapping scheme in the frequency domain to satisfy a single carrier characteristic.

 6 illustrates a signal processing procedure in which DFT process output samples are mapped to a single carrier in cluster SC-FDMA.

 7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a cluster SC-FDMA.

 9 illustrates a signal processing procedure in segment SC-FDMA.

 10 illustrates a structure of an uplink subframe.

 11 illustrates a signal processing procedure for transmitting a reference signal (RS) in uplink.

 12 illustrates a demodulation reference signal (DMRS) structure for a PUSCH.

 13-14 illustrate slot level structures of the PUCCH formats la and lb.

 15 through 16 illustrate the slot level structure of the PUCCH format 2 / 2a / 2b.

 17 illustrates ACK / NACK channelization for PUCCH formats la and lb.

 18 illustrates channelization for a mixed structure of PUCCH format 1 / la / lb and format 2 / 2a / 2b in the same PRB.

 19 illustrates PRB allocation for PUCCH transmission.

20 illustrates a concept of managing a downlink component carrier at a base station. 21 illustrates a concept of managing an uplink component carrier in a terminal. 22 illustrates a concept in which one MAC manages multicarriers in a base station. 23 illustrates a concept in which one MAC manages multicarriers in a terminal. 85 FIG. 24 illustrates the concept of one MAC managing a multicarrier at a base station.

 25 illustrates a concept in which a plurality of MACs manage a multicarrier in a terminal. 26 illustrates a concept in which a plurality of MACs manage a multicarrier in a base station. 27 illustrates a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.

 90 FIG. 28 illustrates asymmetric carrier merging with a plurality of DL CCs and one UL CC linked.

 29 through 31 illustrate a CA PUCCH format according to an embodiment of the present invention.

 32-33 illustrate QPSK constellation mapping according to one embodiment of the invention.

 34 illustrates a Space Code Block Coding (SCBC) according to an embodiment of the present invention.

 95 Figure 35 illustrates a base station and a terminal that can be applied to the present invention.

 [Form for conducting invention]

The following techniques are code division mult iple access (CDMA), frequency division multiple access (FDMA), time division mult iple access (TDMA), orthogonal frequency division mult iple access (0FDMA), and single carrier frequency division mult (SC) FDMA iple 100 access), etc. can be used in various advanced access systems. CDMA may be implemented by radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. 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). 0FDMA can be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), 105 IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA). UTRA is part of the UMTS Universal Mobile Telecommunications System. 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE-A (Advanced) is a part of 3GPP LTE It is an evolutionary version. For clarity, we will focus on 3GPP LTE / LTE— A

110 The technical spirit of the present invention is not limited thereto.

 In a wireless communication system, a terminal receives information through a downlink (DL) from a base station, and the terminal transmits the information through an uplink (UL) to a base station. The information transmitted and received between the base station and the terminal includes data and various control information, and there are various physical channels according to the type / use of the information transmitted and received.

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

 When the power is turned off again or the new terminal enters the cell in step S101, an initial cell search operation such as synchronizing with the base station is performed in step S101. For this purpose, the terminal is a primary synchronization channel (Primary)

It receives 120 Synchronization Channel (P—SCH) and Secondary Synchronization Channel (S-SCH) to synchronize with the base station and acquires information such as a cell ID. After that, the terminal. In-cell broadcast information may be obtained by receiving a physical broadcast channel from a base station. Meanwhile, the terminal receives a downlink reference signal (DL RS) in an initial cell discovery step to receive a downlink channel.

You can check the status.

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

 After 130, the terminal to step S103 to step to complete the connection to the base station

Random access procedure such as S106 may be performed. To this end, the UE transmits a preamble through a physical random access channel (PRACH) (S103), and a response to the preamble through a physical downlink control channel and a physical downlink shared channel thereto. Can receive messages

135 (S104). In case of contention-based random access, additional physical random access channel transmission (S105) And a contention resolution procedure such as receiving a physical downlink control channel and a corresponding physical downlink shared channel (S106).

 After performing the procedure as described above, the terminal receives the physical downlink control channel / physical downlink shared channel as a general uplink / downlink signal transmission procedure (S107) and

140 Physical Uplink Shared Channel:

 PUSCH / Physical Uplink Control Channel (PUCCH) transmission (S108) may be performed. The control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI). UCI uses HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negat i ve-ACK),

145 SRC Scheduling Request), Channel Quality Indication (CQI), Precoding Matrix Indication (PMI), RKRank Indication (RMI), and the like. UCI is generally transmitted through a PUCCH, but may be transmitted through a PUSCH when control information and traffic data are to be transmitted at the same time. In addition, the UCI may be aperiodically transmitted through the PUSCH according to a network request / instruction. .

 150 is a view for explaining a signal processing procedure for transmitting a UL signal by the terminal.

 In order to transmit the uplink signal, scrambling modules 210 of the terminal may scramble the transmission signal using the terminal specific scramble signal. The scrambled signal is input to the modulation mapper 220, depending on the type of transmission signal and / or the channel state.

155 is modulated into a complex symbol using Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPS), or 16QAM / 64QAM (Quadrature Amplitude Modulation). The modulated complex symbol is processed by the transform precoder 230 and then input to the resource element mapper 240, which can map the complex symbol to a time-frequency resource element. The signal thus processed is an SC-FDMA signal

160 may be transmitted to the base station via the antenna 250.

3 is a diagram for describing a signal processing procedure for transmitting a downlink signal by a base station. In the 3GPP LTE system, the base station may transmit one or more codewords in downlink. The codewords are each scrambled as in the uplink of FIG.

165 modules 301 and modulation mapper 302 may be processed into complex symbols, after which complex symbols are mapped to a plurality of layers by layer mapper 303, each layer being a precoding mode. It may be multiplied by the precoding matrix by 304 and assigned to each transmit antenna. The transmission signals for each antenna processed as described above are mapped to time-frequency resource elements by the resource element mapper 305, respectively, and then 0FDM (0rthogonal Frequency Division).

170 may be transmitted through each antenna via the signal generator 306.

 In a wireless communication system, when a terminal transmits a signal in uplink, a Peak-to-Average Ratio (PAPR) is more problematic than in a case in which a base station transmits a signal in downlink. As described above, uplink signal transmission is different from the 0FDMA scheme used for downlink signal transmission.

175 Carrier-Frequency Division Multiple Access) scheme is used.

 4 is a diagram for explaining an SC-FDMA scheme and a 0FDMA scheme. The 3GPP system employs 0FDMA in downlink and SC-FDMA in uplink.

 Referring to FIG. 4, both a terminal for uplink signal transmission and a base station for downlink signal transmission are serial-to-parallel converters 401 and subcarriers.

The same is true in that it includes a 180 mapper 403, an M-point IDFT mode 404 and a Cyclic Prefix (CP) additional mode 406. However, the terminal for transmitting a signal in the SC-FDMA scheme further includes an N-point DFT models 402. The N-point DFT models 402 partially offset the IDFT processing impact of the M-point IDFT module 404 so that the transmitted signal has a single carrier property.

 185 FIG. 5 illustrates a signal mapping scheme in the frequency domain to satisfy a single carrier characteristic in the frequency domain. FIG. 5 (a) shows a localized mapping method, and FIG. 5 (b) shows a distributed mapping method.

SC—Clustered SC-FDMA, a modified form of FDMA. 190 Clustered SC-FDMA divides DFT process output samples into sub-groups during subcarrier mapping and discontinuously maps them to the frequency domain (or subcarrier domain).

 6 is a diagram illustrating a signal processing procedure in which DFT process output samples are mapped to a single carrier in a cluster SC-FDMA. 7 and 8 are clusters

195 shows a signal processing procedure in which DFT process output samples are mapped to multi-carriers in SC-FDMA. 6 illustrates an example of applying intra-carrier cluster SC-FDMA, and FIGS. 7 and 8 correspond to an example of applying inter-carrier cluster SC-FDMA. FIG. 7 illustrates a case where adjacent component carriers are allocated contiguous in the frequency domain.

When subcarrier spacing between 200 component carriers is aligned, this indicates a case of generating a signal through a single IFFT block. FIG. 8 illustrates a case where a signal is generated through a plurality of IFFT blocks in a situation in which component carriers are allocated non-contiguous in the frequency domain.

 9 is a diagram illustrating a signal processing procedure of segmented SOFDMA.

205 segment SC-FDMA is applied with the same number of IFFTs as any number of DFTs

As the relationship between the DFT and the IFFT has a one-to-one relationship, it is simply an extension of the conventional SC-FDMA DFT spreading and the IFFT frequency subcarrier mapping. This specification collectively names them Segment SC-FDMA. Referring to FIG. 9, the segment SC-FDMA has a single carrier characteristic.

In order to alleviate the 210 condition, the entire time domain modulation symbols are grouped into N (N is an integer greater than 1) groups, and the DFT process is performed in group units.

 10 illustrates a structure of an uplink subframe.

Referring to FIG. 10, an uplink subframe includes a plurality of (eg, two) slots. The slot may include different numbers of SC-FDMA symbols according to CP Cyclic Prefix) length. For example, in case of a normal CP, a slot may include 7 SC-FDMA symbols. The uplink subframe is divided into a data region and a control region. data The area includes a PUSCH and is used to transmit data signals such as voice. The control region includes a PUCCH and is used to transmit control information. The PUCCH includes RB pairs (eg m = 0, 1, 2, 3) located at both ends of the data region on the frequency axis (eg RB pair 7 at frequency mirrored locations). And hop the slot to the boundary. The uplink control information (ie, UCI) includes HARQ ACK / NACK, CQK Channel Quality Information (PMQPrecoding Matrix Indicator), RI (Rank Indication), and the like.

 11 is a diagram illustrating a signal processing procedure for transmitting a reference signal in the uplink. Data is converted into a frequency domain signal through a DFT precoder, and then transmitted through the IFFT after frequency mapping, while RS skips the process through the DFT precoder. Specifically, after the RS sequence is immediately generated (S11) in the frequency domain, the RS is sequentially transmitted through a localization mapping process (S12), an IFFTCS13 process, and a cyclic prefix (CP) attach process (S14).

RS sequence is defined by ^a cyclic shift (cyclic shift) ^a of the base sequence (base sequence) can be expressed as shown in Equation 1.

[Equation 1]

Where ^sc ᅳ ^sc is the length of the RS sequence and ^N is the subcarrier unit.

λ _m <i xrmax, UL 丽 ' ^UL

The size of the resource block indicated, m is ^{1 ≤ M ≤} RB ᅳ ^ RB represents the maximum uplink transmission band. The default sequence ^F "") is divided into several groups. "^ {ο ' ¹ " · ^{, 29} } represents a group number, and ^V corresponds to a base sequence number within the group. Each group consists of one base sequence of length ^M s _C = ^mN , c (≤m≤ 5) and two bases of length ^M = ^mN ^ (6 <m <N ^ ^{X, UL} ) Contains the sequence (v = 0,1) The sequence group number and the corresponding number ^V in the group can be changed r (0) r (M ^RS -l) M ^RS over time. The definition of the basic sequence ^ "'^'"'' ^{vV Jsc 1)} depends on the sequence length s _C.

Basic sequences with lengths greater than ^{3Λ /} -can be defined as:

 -I)

L) is

Given by equation (2).

[Equation 2] r _{u> v} (") = x _q {mod), 0≤n <Here, the q-th root Zadoff-Chu sequence can be defined by the following equation (3). have.

[Equation 3]

0≤ / w≤NB0-1 Here, q satisfies the following equation (4).

[Equation 4]

Where the length of the Zadoff-Chu sequence

Given by the largest prime number, and therefore satisfies ^ zc ^<M s _C.

A basic sequence with a length less than ^{3N & c} may be defined as follows. First, - ^ for the M sc _sc = 2N _SC base simwon seuneun given as Equation ₍₅₎ eu

[Equation 5] Yes

Where the values for ^M s = and Af _s = ² N _s are given in Tables 1 and 2, respectively.

 Table 1

 U ^ (0) ,. ^ (11)

 0 -1 1 3 -3 3 3 1 1 3 1 -3 3

 1 1 1 3 3 3 -1 1 -3 -3 1 -3 3

 2 1 1 -3 -3 -3 -1 -3 -3 1 -3 1 -1

 3 -1 1 1 1 1 -1 -3 -3 1 -3 3 -1

 4 -1 3 1 -1 1 -1 -3 -1 1 -1 1 3

 5 1 -3 3 -1 -1 1 1 -1 -1 3 -3 1

 6 -1 3 -3 -3 -3 3 1 -1 3 3 -3 1

 7 -3 -1 -1 -1 1 -3 3 -1 1 -3 3 1

 8 1 -3 3 1 -1 -1 -1 1 1 3 -1 1

 9 1 -3 -1 3 3 -1 -3 1 1 1 1 1

 10 -1 3 -1 1 1 一 3 -3 一 1 -3 -3 3 -1

 11 3 1 -1 -1 3 3 -3 1 3 1 3 3

 12 1 -3 1 1 -3 1 1 1 -3 -3 -3 1

 13 3 3 -3 3 -3 1 1 3 -1 -3 3 3

 14 -3 1 -1 -3 -1 3 1 3 3 3 -1 1

 15 3 -1 1 -3 -1 -1 1 1 3 1 -1 -3

 16 1 3 1 -1 1 3 3 3 -1 -1 3 -1

 17 -3 1 1 3 -3 3 -3 -3 3 1 3 -1

 18 -3 3 1 1 -3 1 一 3 -3 -1 -1 1 -3

 19 -1 3 1 3 1 -1 -1 3 -3 -1 -3 -1

 20 -1 -3 1 1 1 1 3 1 -1 1 -3 -1

 21 -1 3 -1 1 one 3 -3 one 3 -3 one 3 1 -1 -3

 22 1 1 -3 -3 -3 -3 -1 3 -3 1 -3 3

 23 1 1 -1 一 3 -1 -3 1 -1 1 3 -1 1

 24 1 1 3 1 3 3 -1 1 -1 -3 -3 1

 25 1 -3 3 3 1 3 3 1 -3 -1 -1 3

 26 1 3 -3 -3 3 -3 1 -1 -1 3 -1 -3

 27 -3 -1 -3 -1 -3 3 1 -1 1 3 -3 -3

 28 -1 3 -3 3 -1 3 3 one 3 3 3 -1 -1

 29 3 一 3 -3 -1 -1 -3 -1 3 -3 3 1 -1

[Table 2] _// : _/ O 2εεοοπο2Μ1κί Ζ839 _Ϊ Π0ΖAV ₇

29

1 1 1 1 3 1 3 1 3 1 1 3 1 1 3 1 3 3 3 1 1 1 1 3 Meanwhile, RS hopping will be described. According to the group hopping pattern "^," and the sequence shift pattern "^ ³ , the sequence group number ^W in a slot can be defined as shown in Equation 6 below.

 Here, mod represents the modulo operation.

 There are 17 different homing patterns and 30 different sequence shift patterns. Sequence group hopping may be enabled or disabled by a parameter that activates group hopping provided by a higher layer.

PUCCH and PUSCH have the same hopping pattern but may have different sequence shift patterns. The group hopping pattern ^ g ^h (" ^s ) is the same for PUSCH and PUCCH and is given by Equation 7 below.

 [Equation 7]

 if group hopping is disabled

 mod 30 if group hopping is enabled

Where ^c () corresponds to a pseudo-random sequence, and pseudo-random

 ^ cell

 v ID

 cinit =

 30

The sequence generator can be initialized to at the beginning of each radio frame.

 f

 The definition of the sequence shift pattern "^ ss is different from each other between PUCCH and PUSCH.

/ ^■ PUCCH PUCCH _ ^ cell ι _Π

For PUCCH, the sequence shift pattern ^{/ ss} is ^{/ ss} ᅳ ^{VlD moaJU}

 PUSCH

Given, for PUSCH, the sequence shift pattern ^{/ ss} / ^sc ^^ uccH + Ajmcx o A _ss Ε {θ, 1, .-., 29} is constructed by higher layers.

Hereinafter, sequence hopping will be described. Sequence hopping is only applied for reference signals of length ^M. For a reference signal of length ^{Msc <sc} , the base sequence number ^v is given as ^v = ⁰ in the base sequence group.

 RS RB Ψ1

For a reference signal of length ^ _SC ^{≥ 6Ar} sc, the basic sequence number within the basic sequence group in slot ^ is given by Equation 8 below.

 [Equation 8]

 hopping is disabledand sequence hopping is enabled

e Here, ^^ corresponds to a pseudo-random sequence, and a parameter enabling sequence hopping provided by a higher layer determines whether sequence hopping is enabled. Pseudo-Random Sequence Generator is a

Can be initialized to

 The reference signal for the PUSCH is determined as follows.

 PUSCH

Reference Signal Sequences for PUSCH

., M _s -l

M ^RS = M ^P画

Cyclic shift in one slot that satisfies ^{sc sc}

+ "S _RS +" _PRS (" _s )) with modl2 With a = 2 "cs / 12. N 0)

 DM S n (2)

A broadcasted value, ^DMRS is given by the uplink scheduling allocation, given as according to "PRsOs) is a cell-specific cyclic shift value." PRsC _"S) is the slot number.

Pseudo-random sequence, cell-specific value. Pseudo-Random Sequence

^JV ID PUSCH

init ^■ 2 ， + / ^r

 30

The generator can be initialized to at the start of the radio frame. Table 3 lists the cyclic shift fields in Downlink Control Information (DCI) format 0.

(2)

 Π DMHS.

 [Table 3]

The physical mapping method for the uplink RS in the PUSCH is as follows. A sequence consists of an amplitude scaling factor ^ ^PUSCH and PUSCH ^

It will be multiplied and mapped to the same set of Physical Resource Blocks (PRBs) used for Daewoong PUSCH in the sequence starting with ^r ( ^u ). As for ^{/ = 3} in the standard cyclic prefix, as for ^{/ = 2,} the cyclic prefix extension Mapping to the resource element, ^Z) in subframe 320 will first be ordered by and then in order of slot number. In summary, if the length is greater than ^sc , the ZC sequence is used with circular expansion, and if the length is less than sc, the computer generated sequence is used. The cyclic shift is determined according to cell-specific cyclic shift, terminal-specific cyclic shift and hopping pattern.

 325

 FIG. 12A illustrates a demodulation reference signal (DMRS) structure for a PUSCH in the case of a normal CP; FIG. 12B illustrates a DMRS structure for a PUSCH in the case of an extended CP. Drawing. In FIG. 12A, DMRS is transmitted through 4th and 11th SC—FDMA symbols, and in FIG. 12B, DMRS is transmitted through 330 3rd and 9th SC-FDMA symbols.

 13 through 16 illustrate a slot level structure of a PUCCH format. PUCCH includes the following format for transmitting control information.

 (1) Format 1: On-off keying (0n-0ff keying) (00K) Modulation, used for scheduling request (SR)

335 (2) Format la and format lb: used for ACK / NACK (Acknowledgment / Negative Acknowledgment) transmission

 1) format la: BPSK ACK / NACK for one codeword

 2) Format lb: QPSK ACK / NACK for 2 codewords [

 (3) Format 2: QPSK modulation, used for CQI transmission

 340 (4) Format 2a and Format 2b: for simultaneous transmission of CQI and ACK / NACK. use

 Table 4 shows a modulation scheme and the number of bits per subframe according to the PUCCH format. Table 5 shows the number of RSs per slot according to the PUCCH format. Table 6 is a table showing the SC-FDMA symbol position of the RS according to the PUCCH format. In Table 4, PUCCH formats 2a and 2b correspond to a standard cyclic prefix.

345 [Table 4] PUCCH format modulation scheme Number of bits per subframe ， M _bit

 1 N / A N / A

 la BPSK 1

 lb QPS 2

 2 QPSK 20

 2a QPSK + BPSK 21

 2b QPSK + BPSK 22

Table 5

Table 6

13 shows the PUCCH formats la and lb in the case of standard cyclic prefix. 14 shows PUCCH formats la and lb in case of extended cyclic prefix. In the PUCCH formats la and lb, control information having the same content is repeated in a slot unit in a subframe. In each terminal, the ACK / NACK signal includes a cyclic shift (CS) (frequency domain code) and an orthogonal cover code (orthogonal cover code) of a CG-CAZAC (Computer-Generated Constant Amplitude Zero Auto Correlation) sequence. This is transmitted through different resources consisting of OC or OCC (Time Domain Spreading Codes). 0C includes, for example, Walsh / DFT orthogonal code. If the number of CS 6 numbered, the number of 0C 3 dogs, can be multiplexed in ^'the same PRB total of 18 terminal based on a single antenna (Physical Resource Block). Orthogonal Sequences w0, wl, w2, w3 are random (after FFT modulation) It can be applied in the time domain or in any frequency domain (prior to FFT modulation).

For SR and persistent scheduling, ACK / NACK resources composed of CS, 0C, and PRB (Physical Resource Block) may be given to the UE through RRCXRadio Resource Control. For dynamic ACK / NACK and the non-continuous 365 Scheduling (non-persistent scheduling), ACK / NACK resources can be given to implicitly (implicitly) terminal by using the smallest (lowest) CCE index of PDCCH to Hung for PDSCH ^' .

 15 shows PUCCH format 2 / 2a / 2b in the case of standard cyclic prefix. 16 shows PUCCH format 2 / 2a / 2b in case of extended cyclic prefix. 15 and 16, in the case of the 370 standard CP, one subframe includes 10 QPSK data symbols in addition to the RS symbol. Each QPSK symbol is spread in the frequency domain by the CS and then the corresponding SC-FDMA symbol. Is mapped to. SC-FDMA symbol level CS hopping can be applied to randomize inter-sal interference. RS can be multiplexed by CDM using cyclic shift. For example, assuming that the number of available CSs is 12 or 6, 12 or 6 terminals 375 may be multiplexed in the same PRB, respectively. In short, a plurality of UEs in PUCCH formats 1 / la / lb and 2 / 2a / 2b may be multiplexed by CS + 0C + PRB and CS + PRB, respectively.

 Orthogonal sequences (0C) of length -4 and length -3 for PUCCH format 1 / la / lb are shown in Tables 7 and 8 below.

 Table 7

 Length-4 orthogonal sequences for PUCCH formats 1/1 a1 b

380

[Table 8] Len th-3 ortho ana \ seq u en ces for PUCCH formats 1/1

The orthogonal sequence (0C) for RS in PUCCH format 1 / la / lb is shown in Table 9 below. Table 9

 la and lb

FIG. 17 is a diagram illustrating ACK / NACK channelization for PUCCH formats la and lb. 17 is

Corresponds to the case of ^{~ A.}

 18 illustrates channelization for a mixed structure of PUCCH formats 1 / la / lb and formats 2 / 2a / 2b in the same PRB.

 Cyclic Shift (CS) hopping and Orthogonal Cover (0C) remapping can be applied as follows.

 (1) Symbol-based cell specific CS hopping for randomization of inter-cell interference.

(2) slot-level CS / 0C remapping 395 1) For inter-sal interference randomization

 2) Slot-based approach for mapping between ACK / NACK channel and resource (k) Meanwhile, the resource () for PUCCH format 1 / la / lb includes the following combinations.

(1) CS (= same as DFT orthogonal code at symbol level) (n _cs )

(2) 0C (orthogonal cover at slot level) (n _oc )

400 (3) Frequency RB (Resource Block) (n _rb )

When the indices representing CS, 0C, and RB are n _cs , n _oc , and n _rb , respectively, the representative index n _r includes n _cs , n _oc , n _r b. n _{r satisfies} n _r = (n _cs , n _oc , n _rb ).

 The combination of CQI, PMI, RI, and, CQI and ACK / NACK may be delivered via PUCCH format 2 / 2a / 2b. Reed Muller (RM) channel coding may be applied.

 For example, channel coding for UL CQI in LTE system is described as follows.

 G Q Q Q CI

Bit stream ^{0 1} is channel coded using a (20, A) RM code. Table 10 shows a basic sequence for the (20, A) code. ^αο and an represent the Most Significant Bit (MSB) and the Least Significant Bit (LSB). In the case of the extended 410 CP, the maximum information bit is 11 bits except when the CQI and the ACK / NACK are simultaneously transmitted. After coding with 20 bits using the RM code, QPSK modulation can be applied. Before QPSK modulation, the coded bits can be scrambled.

Table 10

I Mi.o Mi.i Mi, 2 Mi, ₃ Mi, 4 Mi, 5 Mi, 6 M |, 7 M _ii8 Mi, 9 Mi, lo Mi, 11 Mi, 12

 0 1 1 0 0 0 0 0 0 0 0 1 1 0

1 1 1 1 0 0 0 0 0 0 1 1 1 0

2 1 0 0 1 0 0 1 0 1 1 1 1 1

3 1 0 1 1 0 0 0 0 1 0 1 1 1

4 1 1 1 1 0 0 0 1 0 0 1 1 1

5 1 1 0 0 1 0 1 1 1 0 1 1 1

6 1 0 1 0 1 0 1 0 1 1 1 1 1

7 1 0 0 1 1 0 0 1 1 0 1 1 1

8 1 1 0 1 1 0 0 1 0 1 1 1 1

9 1 0 1 1 1 0 1 0 0 1 1 1 1

10 1 0 1 0 0 1 1 1 0 1 1 1 1

11 1 1 1 0 0 1 1 0 1 0 1 1 1

12 1 0 0 1 0 1 0 1 1 1 1 1 1

13 1 1 0 1 0 1 0 1 0 1 1 1 1

14 1 0 0 0 1 1 0 1 0 0 1 0 1

15 1 1 0 0 1 1 1 1 0 1 1 0 1

16 1 1 1 0 1 1 1 0 0 1 0 1 1

17 1 0 0 1 1 1 0 0 1 0 0 1 1

18 1 1 0 1 1 1 1 1 0 0 0 0 0

19 1 0 0 0 0 1 1 0 0 0 0 0 0 Channel Coding Bit "ο '"ι'" ² '" ³ ' ··· '" ^β — l can be generated by Equation 9. Equation 9

bi = ∑ Ψη -M _in ) mod2 where i = 0, 1, 2,... ， Meets Bl.

 Table 11 shows an Uplink Control Information (UCI) field for wideband reporting (single antenna port, transmit diversity or open loop spatial multiplexing PDSCH) CQI feedback.

Table 11

 Table 12 shows the UCI fields for CQI and PMI feedback for broadband, which reports closed loop spatial multiplexing PDSCH transmissions.

Table 12 treason

 Phil c 2 antenna ports 4 antenna ports

 Tank = 1 Tank = 2 tank = 1 Tank> 1 Wide-band CQI 4 4 4 4

 Spatial differential CQI 0 3 0 3

 PMKPrecoding Matrix Index) 2 1 4 4 Table 13 shows the UCI fields for RI feedback for wideband reporting.

Table 13

19 illustrates PRB allocation. As shown in FIG. 19, the PRB may be used for PUCCH transmission in slot n _s .

 A multicarrier system or a carrier aggregation system refers to a system that aggregates and uses a plurality of carriers having a band smaller than a target bandwidth for wideband support. When a plurality of carriers having a band smaller than the target band is aggregated, the band of the aggregated carriers may be limited to the bandwidth used by the existing system for backward compatibility with the existing system. For example, the existing LTE system supports bandwidths of 1.4, 3, 5, 10, 15, and 20 MHz, and the LTE-Advanced (LTE-A) system improved from the LTE system only uses bandwidths supported by LTE. It can support bandwidth greater than 20MHz. Alternatively, a new bandwidth can be defined to support carrier aggregation regardless of the bandwidth used by the existing system. Multicarrier is a name that can be used commonly with carrier aggregation and bandwidth aggregation. In addition, carrier aggregation collectively refers to both contiguous and non-contiguous carrier merging.

20 is a diagram illustrating a concept of managing downlink component carriers in a base station, and FIG. 21 is a diagram illustrating a concept of managing uplink component carriers in a terminal. For convenience of explanation, hereinafter, the upper layers will be briefly described as MACs in FIGS. 20 and 21. 22 illustrates a concept in which one MAC manages multicarriers in a base station ^. do.

450 FIG. 23 illustrates a concept in which one MAC manages multicarriers in a terminal.

 22 and 23, one MAC manages and operates one or more frequency carriers to perform transmission and reception. Frequency carriers managed in one MAC do not need to be contiguous with each other, which is advantageous in terms of resource management. In FIG. 22 and 23, one PHY is one for convenience.

It means 455 component carrier. Here, one PHY does not necessarily mean an independent radio frequency (RF) device. In general, one independent RF device means one PHY, but is not limited thereto, and one RF device may include several PHYs.

 24 illustrates a concept in which a plurality of MACs manages multicarriers in a base station.

460 FIG. 25 illustrates a concept in which a plurality of MACs manage a multicarrier in a terminal. 26 illustrates another concept in which a plurality of MACs manages multicarriers in a base station. 27 illustrates another concept in which a plurality of MACs manage a multicarrier in a terminal.

 In addition to the structure of FIGS. 22 and 23, as shown in FIGS. 24 to 27, multiple carriers may control multiple carriers instead of one MAC.

 465 Each carrier may be controlled 1: 1 by each MAC as shown in FIGS. 24 and 25. As shown in FIGS. 26 and 27, each carrier is controlled 1: 1 by each MAC for some carriers. One MAC may control the remaining one or more carriers. The above system is a system including a plurality of carriers from 1 to N, and each carrier may be used adjacent or non-contiguous.

470 This may be applied regardless of uplink / downlink. The TDD system is configured to operate N multiple carriers including downlink and uplink transmission in each carrier, and the FDD system is configured to use multiple carriers for uplink and downlink, respectively. In the case of the FDD system, asymmetrical carrier aggregation may be supported in which the number of carriers and / or the bandwidths of carriers merged in uplink and downlink are different.

475 When the number of component carriers aggregated in the uplink and the downlink is the same, all It is possible to configure the component carrier to be compatible with existing systems. However, component carriers that do not consider compatibility are not excluded from the present invention.

 Hereinafter, for convenience of description, when the PDCCH is transmitted on the downlink component carrier # 0, the corresponding PDSCH is transmitted on the downlink component carrier # 0.

It is assumed that 480 is described, but cross-carrier scheduling is applied so that the corresponding PDSCH can be transmitted through another downlink component carrier. The term “component carrier” may be replaced with another equivalent term (eg cell).

 FIG. 28 illustrates a scenario in which uplink control information (UCI) is transmitted in a wireless communication system supporting carrier aggregation. For convenience

485 This example assumes that UCI is ACK / NACK (A / N). However, this is for convenience of description and the UCI may include control information such as channel state information (eg, CQI, PMI, RI) and scheduling request information (eg, SR) without limitation.

 28 illustrates an asymmetric carrier aggregation in which five DL CCs are linked with one UL CC. The illustrated asymmetric carrier merging may be set in terms of UCI transmission. In other words, UCI

The DL CC-UL CC linkage for 490 and the DL CC-UL CC linkage for data may be set differently. For convenience, assuming that one DL CC can transmit up to two codewords, the UL ACK / NAC bit also needs at least 2 bits. In this case, at least 10 bits of ACK / NACK bits are required to transmit ACK / NACK for data received through five DL CCs through one UL CC. If the DTX status by DL CC

To support 495, at least 12 bits 05 ⁵ = 3125 = 11.61 bits) are required for ACK / NACK transmission. Since the existing PUCCH format la / lb can transmit ACK / NACK up to 2 bits, such a structure cannot transmit increased ACK / NACK information. For convenience, the carrier aggregation is illustrated as an increase in the amount of UCI information. However, this situation may occur due to an increase in the number of antennas, the presence of a backhaul subframe in a TDD system, and a relay system.

Similar to 500 ACK / NACK, even when transmitting control information associated with a plurality of DL CCs through one UL CC, the amount of control information to be transmitted is increased. For example, if you need to send CQICQI / PMI / RI for multiple DL CCs, the UCI payload may increase. Can be. DLCC and ULCC may also be referred to as DLCell and UL Cell, respectively. In addition, the anchor DL CC and the anchor UL CC may be referred to as DL PCelKPrimary Cell) and UL PCell, respectively.

The 505 DL primary CC may be defined as a DL CC linked with an UL primary CC. Linkage here encompasses both implicit and explicit linkages. In LTE, one DL CC and one UL CC are uniquely paired. For example, a DL CC linked with an UL primary CC may be referred to as a DL primary CC by LTE pairing. You can think of this as an implicit linkage. Explicit linkage

This means that the 510 network configures the linkage in advance ((11 81 « ^" 1011) and may be signaled by RRC, etc.) In the explicit linkage, the DL CC paired with the UL primary CC is called the primary DL CC. Here, the UL primary (or anchor) CC may be a UL CC through which PUCCH is transmitted, or the UL primary CC may be a UL CC through which UCI is transmitted through PUCCH or PUSCH, or DL primary. CC upper layer

515 may be configured via signaling. Alternatively, the DL primary CC may be a DL CC to which the UE performs initial access. In addition, a DL CC except for the DL primary CC may be referred to as a DL secondary CC. Similarly, the UL CC except for the UL primary CC may be referred to as a UL secondary CC.

 DL-UL pairing may correspond to FDD only. TDD uses the same frequency

520 Separate DL-UL pairing may not be defined. In addition, DL—UL linkage may be determined from UL linkage through UL EARFCN information of SIB2. For example, the DL-UL linkage may be obtained through SIB2 decoding at initial connection and otherwise obtained through RRC signaling. Thus, only SIB2 linkage exists and other DL-UL pairing may not be explicitly defined. For example, in the 5DL: 1UL structure of FIG. 28, DL

The 525 CC # 0 and the UL CC # 0 are in a SIB2 linkage relationship with each other, and the remaining DL CCs may be in a SIB2 linkage relationship with other UL CCs which are not configured in the corresponding UE.

 Example: PUCCH format adaptation

The PUCCH format proposed in 3GPP so far to transmit increased UCI is largely as follows. For convenience, the following PUCCH format is used for CA Carrier Aggregation) PUCCH. Referred to as 530 format. The CA PUCCH format is defined for convenience of description, and does not mean that the PUCCH format below is limited to a CA situation. For example, the CA PUCCH format described herein includes, without limitation, the PUCCH format used to transmit the increased UCI when the information amount of UCI is increased due to relay communication or TDD.

 1. Channel selection

535 A specific resource is selected from a plurality of resources defined for RS + UCI, and a UCI modulation value is transmitted through the selected resource. Table 14 exemplifies a mapping table in the case of transmitting 3-bit ACK / NACK using channel selection. Modulation used QPSK.

 Table 14

 Here, Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission. Denotes a QPSK modulation value.

 2. Enhanced channel selection

In the plurality of resources defined for RS + UCI, resources for the RS portion and the UCI portion are separately selected, and the UCI modulation value is transmitted through the selected resources. Table 15 shows three bits A mapping table for transmitting ACK / NACK with improved channel selection is illustrated. Modulation used BPSK.

 Table 15

 Here, Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission. 550 1, -1 represents a BPSK modulation value.

 3. Reduce Spreading Factor

 29 illustrates a PUCCH format for transmitting UCI using SF reduction and a signal processing procedure therefor. The basic process is the same as described with reference to FIGS. However, in this example, more modulation symbols (symbol 0,1) can be transmitted by reducing the SF 555 value used in the LTE PUCCH format 1 / la / lb structure from 4 to 2. The number, location, etc. of the UCI / RS symbols illustrated in the drawings may be freely modified according to the system design.

 4. Channel selection with SF2

This method combines the channel selection and SF reduction described above. Table 16 lists 4-bit ACK / NACK. A mapping table in the case of transmitting using channel selection + SF = 2 is illustrated.

QPSK was used.

 Table 16

 Here, Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission. 1, -1J, -j represents a QPSK modulation value.

 5. PUCCH Format 2

It is a method of transmitting using PUCCH format 2 of the existing LTE. LTE PUCCH format 2 supports up to 11 bits to 13 bits of information bits. 6. DFT-s-OFDMA Using Time Domain CDM

 570 FIG. 30 illustrates a PUCCH format for transmitting UCI using DFT-s-OFDMA and time domain CDM and a signal processing procedure therefor. The number, location, etc. of the UCI / RS symbols illustrated in the drawings may be freely modified according to the system design.

 Referring to FIG. 30, a channel coding block may channel-code information bits a_0, a_l, ..., a_M-l (e.g., multiple ACK / NACK bits) to encode an encoded bit,

575 coded bit or coding bit) (or codeword) b_0, b_l, ..., b_N_l are generated. M represents the size of the information bits, and N represents the size of the coding bits. The information bit includes uplink control information (UCI), for example, multiple ACK / NACKs for a plurality of data (or PDSCHs) received through a plurality of DL CCs. Here, the information bits a_0, a_l, and a_M-l are joints regardless of the type / number / size of the UCI constituting the information bits.

580 is coded. For example, if the information bits include multiple ACK / NACKs for a plurality of DL CCs, channel coding is not performed for each DL CC or for individual ACK / NACK bits, but for all bit information. A single codeword is generated. Channel coding includes, but is not limited to, simple repetition, simple coding, Reed Muller coding, punctured RM coding, TBCCCT-biting convolutional coding,

585 Includes low-density parity-check (LDPC) or turbo-coding. Although not shown, coding bits may be rate-matched in consideration of modulation order and resource amount. The rate matching function may be included as part of the channel coding block or may be performed through a separate function block. For ^'example, the channel coding block to obtain a single code word by performing a (32,0) RM code for a plurality of control information, the buffer for this cycle

590 Rate—Matching can be performed.

 A modulator modulates the coding bits b_0, b_l, '', b_N_l to generate modulation symbols c_0, c_l and c_L-1. L represents the size of the modulation symbol. Modulation methods include, for example, n-PSK (Phase Shift Keying) and n-QAM (Quadrature Amplitude Modulat ion) (n is an integer of 2 or more). Specifically, the modulation method is BPSK (Binary PSK),

595 QPSKC Quadrature PSK), 8-PSK, Q 層, 16-QAM, 64-QAM, and the like. A divider divides modulation symbols c_0, c_l, ..., c_L-l into each slot. The order / pattern / method for dividing the modulation symbols into each slot is not particularly limited. For example, the divider may divide a modulation symbol into each slot in order from the front. In this case, as shown, modulation symbols c_0, c_l, ..., c_L / 2-l are assigned to slot 0.

600 divided, modulation symbols c— 172, c_L / 2 + l, ..., c_L-1 may be divided into slot 1. In addition, the modulation symbols can be interleaved (or permutated) upon dispensing into each slot. For example, an even numbered modulation symbol may be divided into slot 0 and an odd numbered modulation symbol may be divided into slot 1. The modulation process and the dispensing process can be reversed.

 The DFT precoder generates a single carrier waveform

DFT precoding for modulation symbols divided into each slot to generate 605 (e.g.,

 12-point DFT). Referring to the drawings, modulation symbols c_0, c_l,... CJ72-1 denotes DFT symbols d_0, d_l,... The modulation symbols c—L / 2, c_L / 2 + 1, ..., and c_L-l are DFT precoded with d_L / 2-1 and divided into slot 1, and d_L / 2, d_L / 2 + 1, ... DFT precoded with d_L-1. DFT precoding is another linear operation

610 operation) (eg, walsh precoding).

 A spreading block spreads the signal on which the DFT is performed at the SOFDMA symbol level (time domain). Time-domain spreading at the SC-FDMA symbol level is performed using a spreading code (sequence). The spreading code includes a quasi-orthogonal code and an orthogonal code. Quasi-orthogonal codes include, but are not limited to, pseudo noise (PN) codes.

615 contains. Orthogonal codes include, but are not limited to, Walsh codes, DFT codes. In this specification, for ease of description, the orthogonal code is mainly described as a representative example of the spreading code. However, the orthogonal code may be replaced with a quasi-orthogonal code as an example. The maximum value of the spreading code size (or spreading factor (SF)) is limited by the number of SC-FDMA symbols used for control information transmission. For example, in one slot

620 When four SC-FDMA symbols are used for transmission of control information, a (quasi) orthogonal code of length 4 (0, ^, ¾ ^, ^) may be used for each slot. SF denotes a spreading degree of control information and may be related to a multiplexing order or antenna multiplexing order of a terminal. have. SF is 1, 2, 3, 4,… It may vary according to the requirements of the system, such as predefined between the base station and the terminal, or DCI black to the terminal through the RRC signaling

625 can be known. For example, when puncturing one of the SC-FDMA symbols for control information to transmit the SRS, a spreading code having SF reduced (for example, SF = 3 instead of SF = 4) may be applied to the control information of the corresponding slot. have.

 The signal generated through the above process is mapped to a subcarrier in the PRB and then converted into a time domain signal through an IFFT. CP is added to the time domain signal,

The 630 SC-FDMA symbol is transmitted through the RF stage.

 The signal processing described with reference to FIG. 30 is an example, and the signal mapped to the PRB in FIG. 30 may be obtained through various equivalent signal processing. For example, the processing order of the DFT precoder and the spreading block may be changed, and the divider and the spreading block may be implemented as one functional block.

 635 7. PUCCH Format 2 Using Multi-Sequence Modulation (MSM)

 31 illustrates a PUCCH format for transmitting UCI using PUCCH format 2 and MSM and a signal processing procedure therefor. The MSM represents a method of performing modulation (eg, QPSK, 8PSK, M-ary QAM, etc.) for each resource by receiving N PUCCH resources. In the figure, (/ = 0, 1, ..., 19) represents a QPSK modulated symbol after channel coding. QPSK in 2 slots

The total number of 640 modulation symbols is 10, and a total of 20 QPSK modulation symbols may be mapped to two antennas (ports). ^ (= 0,1, ..., 19) is a vector representing a sequence (e.g., a computer sequence (including cyclic shifts)) mapped to subcarriers within an RB, and the number of subcarriers in an RB (e.g. 12 31. Referring to FIG. 31, a symbol space can be extended using two orthogonal PUCCH resources, thereby transmitting 645 UCI. In order to prevent for increasing the CM, two PUCCH resources may exist in the same PRB. In addition, in order to further minimize CM increase, two orthogonal resources may use the same PRB index, the same 0C index, and may use different cyclic shifts. In other words, MSM can be used using only cyclic shift differently.

 _ ^ PUCCH

The cyclic shift may be an adjacent value or a value separated by 4 _hift . Of the illustrated structure Case 650, and the coding rate is 1 may transmit the ^"information of up to 40 bits when using the QPSK modulation.

 In the case where at least two types of UCI or UCI / SRS are transmitted (or events) through the PUCCH in LTE, the UCI combination may be large as follows.

 SR + ACK / NAC

655-CQI + ACK / NACK

 SR + CQI

 -S + CQI + ACK / NACK

 At least one of the above UCIs and a transmission in a subframe in which the SRS is configured, when multiple UCIs are transmitted as in the above example, do not degrade system performance

660 proposes a UCI transmission scheme. Specifically, the present invention proposes to change the CA PUCCH format in a corresponding event for multiple UCI transmission. Specifically, the change of the PUCCH format may be performed by using the number of DL CCs or the number of information bits configured for the corresponding UE as a threshold. In addition, the information related to the change of the PUCCH format is UE specific through higher layer signaling (eg, RRC or MAC).

665. way). The information related to the change of the PUCCH format may be information indicating a set of PUCCH formats that the UE can select, or information indicating a specific PUCCH format to be used (or changed) by the UE. Through this, when the UCI simultaneous transmission event occurs, it is possible to match the UCI content and the PUCCH transmission format. When a multiple UCI transmission event occurs in a subframe in which SRS is configured,

670 may be applied directly to the shortened PUCCH format.

 The following figures and embodiments will be described based on the case of using the UCI / RS symbol structure of the PUCCH format 1 or 2 (standard CP) of the existing LTE as a subframe / slot level UCI / RS symbol structure applied to the CA PUCCH format. . However, the subframe / slot level UCI / RS symbol structure in the illustrated CA PUCCH format is defined for convenience of illustration.

675 The present invention is not limited to the specific structure. In the PUCCH format according to the present invention, the number, location, etc. of UCI / RS symbols can be freely modified according to the system design. Hereinafter, an embodiment of the present invention will be described focusing on (event) when simultaneously transmitting CQI + ACK / NACK. For convenience, it is assumed that CQI is for each DL CC, and ACK / NACK includes multiple ACK / NACKs for a plurality of DL COHs. CQI + ACK / NACK Simultaneously

An example of using the 680 transmission is for better understanding of the description, and the present invention can be applied to the same / similarly in case of SR + ACK / NACK and SR + CQIQ SR + CQI + ACK / NACK.

 As an example of changing the PUCCH format, it may be considered to transmit a plurality of UCIs (eg, CQI + ACK / NACK) through the aforementioned CA PUCCH format at the time when the UCI simultaneous transmission event occurs. According to LTE, in case of CQI, one DL CC

Up to 11 bits of information transfer are required for 685. Considering carrier aggregation, ACK / NACK needs information transmission of up to 10 bits (or 12 bits) based on 5 DL CCs. Therefore, a total of 21 bits of information may be required to achieve simultaneous transmission through joint coding. The following two examples may be considered for the case of CQI + ACK / NACK. First, in case of feeding back ACK / NACK through PUCCH format 2,

In 690 events, joint coding may be performed through PUCCH format 2 using MSM. In this case, the information bit stream for each of the CQI and the ACK / NACK may be located in advance. For example, in the case of channel coding based on RM coding, since the front side of the Basis sequence is more reliable, relatively more important ACK / NACK information may be disposed, followed by CQI information. Other coding

The same principle can be applied to the 695 technique. PUCCH resources for the MSM format may be indicated or pre-determined / defined through higher layer signaling or DCI.

 Second, in case of feeding back ACK / NACK through PUCCH format 1 / la / lb-based (improved) channel «selection, the information jointly coded using PUCCH format 2 or DFT-s-OFDMA format using MSM in the event is returned. You can feedback. At this time, CQI and ACK / NACK

The information bit stream for each 700 may be located in advance in advance. For example, in the case of channel coding based on RM coding, since the front of the basis sequence is more reliable, relatively more important ACK / NACK information may be disposed, followed by CQI information. The same principle applies to other coding techniques. Applicable PUCCH resource for MSM format or DFT-s-OFDMA is higher layer

705 may be indicated or pre-determined / defined via signaling or DCI.

 The above example describes a PUCCH format 2 or a DFT-s-OFDMA format using MSM as an example of a modified PUCCH format change, but these may be replaced with any CA PUCCH format capable of transmitting joint coded information.

 On the other hand, as CA PUCCH, (improved) channel selection or PUCCH format 2 is applied

If it is 710, transmission through the joint coding in the event is impossible. In this case, when multiple UCI transmission events occur, it may be considered to drop some UCI. For example, if the base station has configured the CA PUCCH format with (improved) channel selection or PUCCH format 2, it will drop the CQI with priority over ACK / NACK when a simultaneous transmission event of CQI + ACK / NACK occurs. Can be. In case of SR + CQI + ACK / NACK, only CQI

715 may drop and perform SR + ACK / NACK transmission.

 32 exemplarily illustrates a method of simultaneously transmitting SR + UCI (eg, SR + ACK / NACK) according to the present invention. SR + UCI simultaneous transmission may be made when another UCI transmission is also triggered in the subframe in which the SR transmission is triggered. In this case, SR + UCI simultaneous transmission is possible by converting other UCI (eg, ACK / NACK) information into SR format. In other words, SR

In case of 720 positive, another UCI may be converted into an SR format and transmitted.

 Referring to FIG. 32, when all ACK / NACK results for multiple DL CCs are NAK, when SR + ACK / NACK is transmitted, NAK and at least one ACK, the number of ACKs may be loaded in an SR resource. Here, the NAK includes a case where decoding of downlink data fails and a case where DTX (Discontinuous Transmission) occurs. DTX occurrence

725 Can be inferred from the counter information included in the PDCCH for downlink scheduling. The counter information may indicate the order of the scheduled PDCCH (or PDSCH) or the total number of scheduled PDCCH (or PDSCH).

 In detail, when all of the ACK / NACK results for the multiple DL COHs are NACK, the QPSK modulation value 1 may be carried on the SR resource and transmitted. On the other hand, the number of ACK is 1, 2, 3, 4, 5, 6

In the case of 730, the QPSK modulation values j,-Ι, -jJ,-Ι, -j can be carried on SR resources. this In this case, the SR is indicated by the presence or absence of signal transmission (ie, ON / OFF keying) on the SR resource, and the ACK / NACK is indicated by the modulation value on the SR resource. In this example, the state in which the number of ACKs overlaps with one QPSK modulation value is illustrated twice, but may be designed so as not to overlap.

 Table 17 shows ACK / NACK bits (6 (0), b (l)) carried in an SR format for SR + ACK / NACK transmission in FIG. The number of ACKs in Table Γ7 also includes the number of ACKs for the conventional PDSCH and the ACK for the Semi Persistent Scheduling (SPS) PDSCH. The PDCCH for PDSCH scheduling may include information on the total number of PDCCHs (or PDSCHs) scheduled for the corresponding UE, and order information (eg, counters) of the scheduled PDCCHs (or PDSCHs). In this case, the UE may recognize the DTX when some PDCCHs (or PDSCHs) are lost, and may feed back the number of ACKs to 0 when any one of the DTXs occurs.

 Table 17

 As an example of the modification of FIG. 32, during SR + ACK / NACK transmission, ACK / NACK for multiple DL CCs is replaced with one representative information through a logical AND (or logical 0R) operation, and the information bundled in the SR resource is modulated and transmitted. Can be. ᅳ

33 illustrates a method of simultaneously transmitting SR + ACK / NACK according to the present invention. The SR + ACK / NACK simultaneous transmission situation may be performed when ACK / NACK transmission is also triggered in the subframe in which SR transmission is triggered. In this case, the ACK / NACK information is in SR format. By converting and transmitting, simultaneous SR + ACK / NACK transmission is possible.

 750 Referring to FIG. 33, if all ACK / NACK results for multiple DL CCs are NAK during SR + ACK / NACK transmission, DTX is transmitted. If at least one is ACK, the number of ACKs can be loaded in SR resources. have. Although not limited thereto, the UE may feed back a DTX to the base station by dropping transmission of a specific RS symbol (eg, a second RS symbol) in the PUCCH. Here, NAK is for the downlink data

755 includes a case where decoding fails and a case where DTX (Discontinuous Transmission) occurs. The DTX generation may be inferred from the counter information included in the PDCCH for downlink scheduling. The counter information may indicate the order of the scheduled PDCCH (or PDSCH) or the total number of scheduled PDCCH (or PDSCH).

 Specifically, when the number of ACKs is 1,2,3,4,5,6,7,8, respectively, the QPSK modulation value

760 may be carried on the SR resource and transmitted. In this example, a state in which the number of ACKs overlaps with one QPSK modulation value is illustrated twice, but may be designed so as not to overlap.

 . Hereinafter, a case of transmitting CQI / PMI / RI will be described in detail.

 PUCCH format change may be performed based on the number of bits of UCI. in this case,

Considering 765 LTE, the threshold for the number of UCI bits may be 11 bits. For example, when the UCI is 11 bits or less, the existing LTE PUCCH format 2 may be used. If the UCI is 12 bits or more, the PUCCH format 2 using the MSM may be used. Here, PUCCH format 2 using MSM may be replaced with any CA PUCCH format (DFT-s- (DMA PUCCH format). The channel coding process for MSM is TBCC Tail-biting Convolut ional defined in LTE.

770 Coding) and rate-matching. Resources for the MSM may be pre-specified to the UE through RRC configuration (conf igurat ion) or inferred from resources allocated in PUCCH format 2. For example, two resources are needed for MSM and PUCCH format 2

In this case, the resource cc // can be used as the first resource for the MSM. Since the resources for the MSM are preferably in the same PRB, the second resource for the MSM is MSM. First resource and circular shift for Only resources can be set differently.

 (2) (2) 一

 For example, after inferring the cyclic shift value used in,

(2), _Λ PUCCH („(2) + P _h U _lf CCH 、 _mn / Ί 7 / Λ ^PUCC \

+ Δ, _{Α (/} , black can be used as a second resource for MSM by inferring I, jmod 12 / A ^ j and complimenting seed H). That is, ^Δ may be used as an offset for obtaining the second 780th resource of the MSM. Thus, both resources

 PUCCH PUCCH

The cyclic shift interval between them drops by ^f '. If ^shift is 2 or more, CS

 (2)

To effectively use cyclic shifts between intervals, infer the cyclic shift value ^ used in ⁿ PuccH, or apply (^ ⁺¹ ) ^m0d ( ¹² ) and infer ("^ cc") To use as a second resource for MSM

 PUCCH _

785 may be. ^The present invention can also be applied in the case of ^{Δ _1} , but there are some scheduling restrictions. The offset applied in the positive direction for the first cyclic shift value of the MSM can also be applied in the negative direction.

 34 shows an example of transmitting a PUCCH using SCBC (Space Code Block Coding). This example illustrates the application of SCBC to PUCCH format 2 using MSM.

790, but can be applied to any PUCCH format using the MSM. In the drawing

 (/ = 0,1, ..., 19) denotes a QPSK modulated symbol after channel coding. The total number of QPSK modulation symbols in two slots is 10, and a total of 20 QPSK modulation symbols may be mapped to two antennas (ports). ^ (; = 0,1, ..., 19) is a vector representing the sequence (e.g., computer sequence (including cyclic shift applied)) mapped to subcarriers within an RB, and the number of subcarriers in an RB 795 (E.g. 12).

Referring to FIG. 34, the multi-sequence transmitted through the antenna (port) 0 is transmitted in the same manner as in the case of ΙΤχ. On the other hand, multi-sequences transmitted through antenna (port) 1 are precoded for transmit diversity in the space-code domain (eg, Alamouti coding). This scheme may be referred to as Space Code Block Coding (SCBC). here, The 800 Alamouti coding is not only a matrix of Equation 10, but all of its unitary transformations.

 Include.

 [Equation 10]

antenna

 Where (.r is a complex conjugate operation of (ᅳ). In the figure, s。 is an antenna

805 corresponds to a sequence loaded on orthogonal resource 0 of 0 and a received sequence corresponds to a sequence loaded on orthogonal resource 1 of antenna (port) 0. Denotes a sequence carried in orthogonal resource 0 of antenna (port) 1, and (s ₀ ) ^* corresponds to a sequence carried in orthogonal resource 1 of antenna (port) 0. Although the figure illustrates a case in which SCBC is applied in units of subframes, the SCBC according to the present scheme is independently for each smaller time unit (eg, slot unit).

810 may be performed.

 As described above, UCI is transmitted using two resources for each antenna, and transmit diversity is applied to UCI between antennas. On the other hand, two resources for RS can be used for channel estimation for each antenna (port). For example, the RS transmitted through the first antenna uses a first resource (= PUCCH format 2 resource) and the second

The RS transmitted via the 815 antenna uses the second resource. That is, RS may be transmitted using one resource for each antenna.

 35 illustrates a base station and a terminal that can be applied to an embodiment of the present invention. Referring to FIG. 35, a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120. Base station 110 includes processor 112, memory 114, and radio frequency (Radio).

820 Frequency (RF) unit 116. The processor 112 may be configured to implement the procedures and / or methods proposed in the present invention. The memory 114 is connected with the processor 112 and stores various information related to the operation of the processor 112. The RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal. Terminal 120 includes a processor 122, a memory 124, and an RF unit 126. Processor 122 seen 825 may be configured to implement the procedures and / or methods proposed in the invention. The memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122. The RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal. The base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.

 The embodiments described above are those in which the elements and features of the present invention are combined in some form. Each element or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. Of the present invention

The order of the operations described in the 835 embodiments may be changed. Some configurations or features of one embodiment may be included in another embodiment or may be substituted for components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

 In this document, embodiments of the present invention have been described mainly based on a signal transmission / reception relationship between a terminal and a base station. This transmission / reception relationship is extended / similarly to signal transmission / reception between the terminal and the relay or the base station and the relay. Certain operations described in this document as being performed by a base station may, in some cases, be performed by an upper node thereof. That is, to a plurality of network nodes including a base station

It is apparent that various operations performed for communication with a terminal in a network made 845 may be performed by a base station or other network nodes other than the base station. A base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like. In addition, the terminal may be replaced with terms such as UE user equipment (MS), mobile station (MS), mobile subscriber station (MSS), and the like.

850 An embodiment according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of a hardware implementation, one embodiment of the invention

Application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), PLDs (pr ogr ammab 1 e logic devices),

855 may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

 In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of modules, procedures, functions, etc. that perform the functions or operations described above. The software code may be stored in a memory unit and driven by a processor.

The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

 It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. example

865 The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

 【Industrial Availability】

 The present invention can be used in a terminal, base station, or other equipment of a wireless mobile communication system. Specifically, the present invention can be applied to a method for transmitting uplink control information and an apparatus for this.

Claims

[Range of request]

 [Claim 1]

 In a method of transmitting a 875 control information through a PUCCH (Physical Uplink Control Channel) in a wireless communication system,

 Generating the control information;

 Selecting a specific PUCCH format from the plurality of PUCCH formats; And transmitting the control information through the specific PUCCH format.

880

[Claim 2]

 The method of claim 1,

 The specific PUCCH format is indicated by higher layer signaling.

 [Claim 3]

885 The method of claim 1,

 The specific PUCCH format is selected based on the number of component carriers configured for the terminal, control information transmission method.

 [Claim 4]

 The method of claim 1,

 890. The specific PUCCH format is selected based on the number of bits of the control information.

 [Claim 5]

 The method of claim 1,

 The control information includes two or more kinds of control information, and the specific PUCCH 895 format is selected based on a combination of control information constituting the control information.

 [Claim 6]

Control over physical uplink control channel (PUCCH) in wireless communication system In a terminal configured to transmit information,

 900 RF (Radio Frequency) unit; And

 Including a processor,

 The processor is configured to generate the control information, select a particular RJCCH format from a plurality of PUCCH formats, and transmit the control information via the specific PUCCH format.

905

[Claim 7]

 The method of claim 6,

 The specific PUCCH format is characterized by being indicated by higher layer signaling.

 [Claim 8]

910 The method of claim 6,

 The specific PUCCH format is selected based on the number of component carriers configured for the terminal, terminal.

 [Claim 9]

 The method of claim 6,

 915 The specific PUCCH format is selected based on the number of bits of the control information, terminal.

 [Claim 10]

 The method of claim 6,

 The control information includes two or more kinds of control information, and the specific PUCCH 920 format is selected based on a combination of control information constituting the control information.