KR101233186B1 - Method and apparutus for transmitting control information - Google Patents

Abstract

The present invention relates to a wireless communication system. Specifically, the present invention provides a method and apparatus for transmitting a PUCCH signal in a wireless communication system, comprising the step of setting the transmission power for the PUCCH signal, the PUCCH signal is transmitted in a subframe configured for SR The PUCCH signal includes one or more HARQ-ACK bits and SR bits when it should be, and the SR bits are selectively considered depending on whether there is a transport block for UL-SCH in the subframe when determining the transmission power for the PUCCH. And a device therefor.

Description

TECHNICAL AND APPARUTUS FOR TRANSMITTING CONTROL INFORMATION

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).

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 (OFDMA) systems, and single carrier frequency (SC-FDMA). division multiple access) system.

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, a 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.

The technical problems to be solved by the present invention are not limited to the technical problems and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

In one aspect of the present invention, a method for transmitting a physical uplink control channel (PUCCH) signal by a communication device in a wireless communication system, the method comprising the step of setting the transmission power for the PUCCH signal, the PUCCH signal is SR ( When the PUCCH signal is to be transmitted in a subframe configured for Scheduling Request, the PUCCH signal includes one or more Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) bits and SR bits, and the transmit power for the PUCCH is expressed by using the following equation. A method of determining is provided:

Here, n _HARQ corresponds to the number of information bits of HARQ-ACK, N is a positive integer, n _SR represents 1 when there is no transport block for UL-SCH (Uplink Shared CHannel) in the subframe, UL 0 if there is a transport block for -SCH.

In another aspect of the present invention, a communication device configured to transmit a Physical Uplink Control Channel (PUCCH) signal in a wireless communication system, comprising: a Radio Frequency (RF) unit; And a processor, wherein the processor is configured to set a transmission power for the PUCCH signal, and when the PUCCH signal is to be transmitted in a subframe configured for a scheduling request (SR), the PUCCH signal is one or more HARQ- There is provided a communication device comprising a Hybrid Automatic Repeat Request Acknowledgment (ACK) bit and an SR bit, wherein the transmit power for the PUCCH is determined using the following equation:

Here, n _HARQ corresponds to the number of information bits of HARQ-ACK, N is a positive integer, n _SR represents 1 when there is no transport block for UL-SCH (Uplink Shared CHannel) in the subframe, UL 0 if there is a transport block for -SCH.

Advantageously, the transmit power for the PUCCH signal in subframe i is determined using the following equation:

Here, P _PUCCH ( i ) represents the transmission power for the PUCCH,

P _{CMAX, c} ( i ) represents the maximum transmit power set for serving cell c,

P _{O_PUCCH} represents a parameter set by a higher layer,

PL _c represents a downlink path loss estimate of the serving cell c,

Δ _{F_PUCCH} ( F ) represents a value corresponding to the PUCCH format,

Δ _TxD ( F ′) represents a value or 0 set by a higher layer,

g ( i ) represents the current PUCCH power control adjustment state.

Preferably, when there is no transport block for uplink shared channel (UL-SCH) in the subframe, the SR bit represents the actual SR information, and if there is a transport block for UL-SCH in the subframe, the SR bit is Dummy information is shown. The dummy information may have any particular value set in advance. For example, when the SR bit represents dummy information, the SR bit may be set to a predetermined value of 0 or 1, preferably 0.

Advantageously, said SR bit is added to the end of said one or more HARQ-ACK bits.

Preferably, the SR bit is set to 1 for a positive SR, and the SR bit is set to 0 for a negative SR.

Advantageously, said at least one HARQ-ACK bit and said SR bit are joint coded.

Preferably, the communication device is set to simultaneous PUCCH and PUSCH (Physical Uplink Shared Channel) mode.

Preferably, said N is 2 or 3.

Advantageously, said one or more HARQ-ACK bits and SR bits are joint coded.

Preferably, the PUCCH signal is a PUCCH format 3 signal.

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 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 an embodiment of the present invention and together with the description, illustrate the technical idea of the present invention.
1 illustrates a physical channel 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 the structure of a radio frame.
3A illustrates an uplink signal processing process.
3B illustrates a downlink signal processing process.
4 illustrates an SC-FDMA scheme and an OFDMA 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 through 14 illustrate slot level structures of PUCCH formats 1a and 1b.
15-16 illustrate the slot level structure of PUCCH format 2 / 2a / 2b.
17 illustrates ACK / NACK channelization for PUCCH formats 1a and 1b.
18 illustrates channelization for a mixed structure of PUCCH formats 1 / 1a / 1b and formats 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.
24 illustrates a concept in which one MAC manages multicarriers in 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.
28 illustrates asymmetric carrier merging with a plurality of DL CCs and one UL CC linked.
29A to 29F illustrate the structure and signal processing procedure of PUCCH format 3.
30 exemplifies a UL transmission process according to the existing 3GPP Rel-8 / 9.
31 illustrates a process of transmitting control information through a PUCCH according to an embodiment of the present invention.
32 illustrates a base station and a terminal that can be applied to the present invention.

The following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used in various radio access systems. CDMA may be implemented in radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA and LTE-A (Advanced) is an evolved version of 3GPP LTE. For clarity of description, 3GPP LTE / LTE-A is mainly described, but the technical idea 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 information through an uplink (UL) to the base station. The information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels exist depending on the type / use of the information transmitted / received.

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

The terminal that is powered on again or the cell that has entered a new cell performs an initial cell search operation such as synchronizing with the base station in step S101. 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 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 through a Physical Random Access Channel (PRACH) (S103), and transmits a response message for a preamble through the physical downlink control channel and the corresponding physical downlink shared channel (S104). In the case of a contention-based random access, a contention resolution procedure such as transmission of an additional physical random access channel (S105) and physical downlink control channel and corresponding physical downlink shared channel reception (S106) can be performed .

The UE having performed the above procedure can then receive physical downlink control channel / physical downlink shared channel reception (S107) and physical uplink shared channel (PUSCH) / physical downlink shared channel A Physical Uplink Control Channel (PUCCH) transmission (S108) may be performed. The control information transmitted from the UE to the Node B is collectively referred to as Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgment / Negative-ACK (HARQ ACK / NACK), Scheduling Request (SR), Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indication (RI), and the like. In this specification, HARQ ACK / NACK is simply referred to as HARQ-ACK or ACK / NACK (A / N). The HARQ-ACK includes at least one of positive ACK (simply ACK), negative ACK (NACK), DTX and NACK / DTX. The UCI is generally transmitted through the PUCCH, but may be transmitted via 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 illustrates the structure of a radio frame. In a cellular OFDM wireless packet communication system, uplink / downlink data packet transmission is performed in subframe units, and one subframe is defined as a predetermined time interval including a plurality of OFDM symbols. The 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).

2 (a) illustrates the structure of a Type 1 radio frame. A downlink radio frame is composed of 10 subframes, and one subframe is composed of two slots in a time domain. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). For example, one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms. One slot includes a plurality of OFDM symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain. In the 3GPP LTE system, since OFDMA is used in the downlink, an OFDM symbol represents one symbol period. The OFDM symbol may also be referred to as an SC-FDMA symbol or a symbol interval. A resource block (RB) as a resource allocation unit may include a plurality of consecutive subcarriers in one slot.

The number of OFDM symbols included in one slot may vary depending on the configuration of a cyclic prefix (CP). CPs include extended CPs and normal CPs. For example, when an OFDM symbol is configured by a standard CP, the number of OFDM symbols included in one slot may be seven. When the OFDM symbol is configured by the extended CP, since the length of one OFDM symbol is increased, the number of OFDM symbols included in one slot is smaller than that of the standard CP. In the case of the extended CP, for example, the number of OFDM symbols included in one slot may be six. If the channel condition is unstable, such as when the UE moves at a high speed, an extended CP may be used to further reduce inter-symbol interference.

When a standard CP is used, since one slot includes 7 OFDM symbols, one subframe includes 14 OFDM symbols. In this case, the first up to three OFDM symbols of each subframe may be allocated to a physical downlink control channel (PDCCH), and the remaining OFDM symbols may be allocated to a physical downlink shared channel (PDSCH).

2 (b) illustrates the structure of a Type 2 radio frame. Type 2 radio frames consist of two half frames, each of which has five subframes, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). One subframe consists of two slots. DwPTS is used for initial cell search, synchronization or channel estimation at the terminal. UpPTS is used for channel estimation in a base station and synchronization of uplink transmission of a terminal. The guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.

The structure of the radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of symbols included in the slot may be variously changed.

FIG. 3A is a diagram for describing signal processing and ��� for the UE to transmit an uplink signal.

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 uses a Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), or 16QAM / 64QAM (Quadrature Amplitude Modulation) scheme according to the type and / or channel state of the transmitted signal. Is modulated into a complex symbol. 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. [

3B is a diagram for describing a signal processing procedure for transmitting a downlink signal by a base station.

In a 3GPP LTE system, a base station may transmit one or more codewords in the downlink. The codewords may be processed as complex symbols through the scramble module 301 and the modulation mapper 302, respectively, as in the uplink of FIG. 3A, after which the complex symbols may be processed by the layer mapper 303 into a plurality of layers ( Layer, and each layer may be multiplied by the precoding matrix by the 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. Accordingly, as described above with reference to FIGS. 3A and 3B, the uplink signal transmission uses a single carrier-frequency division multiple access (SC-FDMA) scheme unlike the OFDMA scheme used for the downlink signal transmission.

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

Referring to FIG. 4, both a terminal for uplink signal transmission and a base station for downlink signal transmission include a serial-to-parallel converter 401, a subcarrier mapper 403, and an M-point IDFT module. 404 and the Cyclic Prefix (CP) addition module 406 are the same. However, the terminal for transmitting a signal in the SC-FDMA scheme further includes an N-point DFT module 402. [ The N-point DFT module 402 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. FIG. 5A illustrates a localized mapping scheme, and FIG. 5B illustrates a distributed mapping scheme.

Clustered SC-FDMA, a modified form of SC-FDMA, is described. 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 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a cluster SC-FDMA. 6 shows an example of applying an intra-carrier cluster SC-FDMA, and FIGS. 7 and 8 correspond to an example of applying an inter-carrier cluster SC-FDMA. FIG. 7 illustrates a case where a signal is generated through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a situation in which component carriers are continuously allocated in the frequency domain. 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 a 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. 9, the segment SC-FDMA performs a DFT process on a group basis by grouping all time-domain modulation symbols into N (N is an integer greater than 1) groups to alleviate a single carrier characteristic condition.

10 illustrates a structure of an uplink subframe.

Referring to FIG. 10, an uplink subframe includes a plurality of slots (eg, two). The slot may include different numbers of SC-FDMA symbols according to a cyclic prefix (CP) length. For example, in case of a normal CP, a slot may include 7 SC-FDMA symbols. The uplink subframe is divided into a data area and a control area. The data area 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 pairs at frequency mirrored locations). Hop the slot to the boundary. The uplink control information (ie, UCI) includes HARQ ACK / NACK, Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), and Rank Indication (RI).

FIG. 11 illustrates a signal processing procedure for transmitting a reference signal in 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 directly generated in the frequency domain (S11), the RS is sequentially transmitted through a localization mapping process (S12), an IFFT (S13) process, and a cyclic prefix (CP) attachment process (S14). do.

는 기본 시퀀스(base sequence)의 순환 쉬프트(cyclic shift)

에 의해 정의되며 수학식 1과 같이 표현될 수 있다.RS sequence

Is a cyclic shift of the base sequence

It is defined by and can be expressed as Equation 1.

는 RS 시퀀스의 길이이고,

는 부반송파 단위로 나타낸 자원 블록의 크기이며, m은

이다.

는 최대 상향링크 전송 대역을 나타낸다.From here,

Is the length of the RS sequence,

Is the size of the resource block in subcarriers and m is

to be.

Denotes a maximum uplink transmission band.

는 몇 개의 그룹으로 구분된다.

는 그룹 번호를 나타내며,

는 해당 그룹 내의 기본 시퀀스 번호에 해당한다. 각 그룹은 길이가

(

)인 하나의 기본 시퀀스(

)와 길이가

(

)인 두 개의 기본 시퀀스(

)를 포함한다. 해당 그룹 내에서 시퀀스 그룹 번호

와 해당 번호

는 시간에 따라 각각 변할 수 있다. 기본 시퀀스

의 정의는 시퀀스 길이

에 따른다.The default sequence

Are divided into several groups.

Represents the group number,

Corresponds to the base sequence number in the group. Each group has a length

(

One base sequence ()

) And the length

(

Two basic sequences ()

). Sequence group number within that group

And its number

Can vary with time. Basic sequence

The definition of the sequence length

Follow.

이상의 길이를 가진 기본 시퀀스는 다음과 같이 정의할 수 있다.

Basic sequences with lengths above can be defined as follows:

에 대하여, 기본 시퀀스

는 다음의 수학식 2에 의해 주어진다.

With respect to the base sequence

Is given by the following equation.

Here, the q th root Zadoff-Chu sequence may be defined by Equation 3 below.

Here, q satisfies the following equation (4).

는 가장 큰 소수에 의해 주어지고 따라서,

를 만족한다.Where, the length of the Zadoff-Chu sequence

Is given by the largest prime number

.

미만의 길이를 가진 기본 시퀀스는 다음과 같이 정의될 수 있다. 먼저,

와

에 대해 기본 시퀀스는 수학식 5와 같이 주어진다.

A base sequence with length less than may be defined as follows. first,

Wow

The basic sequence for is given by Equation 5.

와

에 대한

의 값은 다음의 표 1과 표 2로 각각 주어진다.From here,

Wow

For

The values of are given in Tables 1 and 2, respectively.

Meanwhile, the RS hopping will be described.

과 시퀀스 시프트(sequence shift) 패턴

에 의해 슬롯

에서 시퀀스 그룹 번호

는 다음의 수학식 6과 같이 정의할 수 있다.Group hopping pattern

And sequence shift patterns

By slot

Sequence group number

May be defined as in Equation 6 below.

Here, mod represents a modulo operation.

There are 17 different hopping 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.

는 PUSCH와 PUCCH에 대해 동일하며 다음의 수학식 7과 같이 주어진다.Group hopping pattern

Is the same for PUSCH and PUCCH and is given by Equation 7 below.

는 슈도-랜덤(pseudo-random) 시퀀스에 해당하며, 슈도-랜덤 시퀀스 생성기는 각 무선 프레임의 시작에서

로 초기화 될 수 있다.From here

Corresponds to a pseudo-random sequence, and the pseudo-random sequence generator is used at the beginning of each radio frame.

Can be initialized to

의 정의는 PUCCH와 PUSCH간에 서로 상이하다.Sequence shift pattern

Are different from each other between PUCCH and PUSCH.

는

로 주어지고, PUSCH에 대해서, 시퀀스 시프트 패턴

는

로 주어진다.

는 상위 계층에 의해 구성된다.For PUCCH, sequence shift pattern

The

For PUSCH, a sequence shift pattern

The

.

Is constituted by an upper layer.

Hereinafter, sequence hopping will be described.

인 기준 신호에 대해서만 적용된다.Sequence hopping has a length

Applies only for reference signals.

인 기준 신호에 대해서, 기본 시퀀스 그룹 내에서 기본 시퀀스 번호

가

로 주어진다.Length

Base sequence number within the base sequence group,

end

.

인 기준 신호에 대해서, 슬롯

에서 기본 시퀀스 그룹 내에서 기본 시퀀스 번호

는 다음의 수학식 8과 같이 주어진다.Length

For a reference signal that is

Default sequence number within the default sequence group

Is given by Equation 8 below.

는 슈도-랜덤 시퀀스에 해당하고, 상위 계층에 의해 제공되는 시퀀스 호핑을 가능하게(enabled) 하는 파라미터는 시퀀스 호핑이 가능한지 여부를 결정한다. 슈도-랜덤 시퀀스 생성기는 무선 프레임의 시작에서

로 초기화 될 수 있다.From here,

Corresponds to a pseudo-random sequence, and a parameter that enables sequence hopping provided by a higher layer determines whether sequence hopping is enabled. Pseudo-Random Sequence Generator is used at the beginning of a radio frame

Can be initialized to

The reference signal for the PUSCH is determined as follows.

는

로 정의된다. m과 n은

을 만족하고,

을 만족한다.Reference Signal Sequence for PUSCH

The

. m and n are

Lt; / RTI >

To satisfy.

와 함께

로 주어진다.Cyclic shift in one slot

with

.

는 방송되는 값이고,

는 상향링크 스케줄링 할당에 의해 주어지며,

는 셀 특정 순환 시프트 값이다.

는 슬롯 번호

에 따라 변하며,

와 같이 주어진다.

Is the value being broadcast,

Is given by the uplink scheduling assignment,

Is a cell specific cyclic shift value.

Is the slot number

Changes depending on

As shown in Fig.

는 슈도-랜덤 시퀀스이며,

는 셀-특정 값이다. 슈도-랜덤 시퀀스 생성기는 무선 프레임의 시작에서

로 초기화 될 수 있다.

Is a pseudo-random sequence,

Is a cell-specific value. Pseudo-Random Sequence Generator is used at the beginning of a radio frame

Can be initialized to

를 나타내는 표이다.Table 3 lists the cyclic shift fields in Downlink Control Information (DCI) format 0.

Table showing

The physical mapping method for the uplink RS in the PUSCH is as follows.

와 곱해지고,

로 시작하는 시퀀스 내에서 대응하는 PUSCH를 위해 사용되는 물리 자원 블록(Physical Resource Block, PRB)의 동일한 세트로 맵핑될 것이다. 표준 순환 전치에 대해서는

으로, 확장 순환 전치에 대해서는

으로 서브프레임 내에서 자원 요소

에 맵핑하는 것은 먼저

의 차수가 증가하고 그리고 나서 슬롯 번호의 순이 될 것이다.A sequence is an amplitude scaling factor

≪ / RTI >

It will be mapped to the same set of Physical Resource Blocks (PRBs) used for the corresponding PUSCH in the sequence beginning with. For the standard circular transpose

For extended circular transposition

Resource elements within subframes

Mapping to

The order of increases and then the slot number.

이상이면, 순환 확장과 함께 ZC 시퀀스가 사용되고, 길이가

미만이면, 컴퓨터 생성 시퀀스가 사용된다. 순환 시프트는, 셀-특정 순환 시프트, 단말-특정 순환 시프트 및 호핑 패턴 등에 따라 결정된다.In short, the length

Above, the ZC sequence is used with circular expansion,

If less, a computer generated sequence is used. The cyclic shift is determined according to cell-specific cyclic shift, terminal-specific cyclic shift, hopping pattern, and the like.

FIG. 12A illustrates a structure of a demodulation reference signal (DMRS) for a PUSCH in the case of a normal CP, and FIG. 12B illustrates a structure of a DMRS for a PUSCH in the case of an extended CP. Drawing. In FIG. 12A, the DMRS is transmitted through the fourth and eleventh SC-FDMA symbols, and in FIG. 12B, the DMRS is transmitted through the third and ninth SC-FDMA symbols.

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

(1) Format 1: On-Off Keying (OOK) Modulation, Used for Scheduling Request (SR)

(2) Format 1a and Format 1b: used for ACK / NACK (Acknowledgment / Negative Acknowledgment) transmission

1) Format 1a: BPSK ACK / NACK for one codeword

2) Format 1b: QPSK ACK / NACK [for 2 codewords]

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

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

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.

13 shows PUCCH formats 1a and 1b in the case of standard cyclic prefix. 14 shows PUCCH formats 1a and 1b in case of extended cyclic prefix. In PUCCH formats 1a and 1b, 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 computer-generated constant amplitude zero auto correlation (CG-CAZAC) sequence. It is transmitted through different resources consisting of OC or OCC (Time Domain Spreading Code). The OC includes, for example, a Walsh / DFT orthogonal code. If the number of CSs is 6 and the number of OCs is 3, a total of 18 terminals based on a single antenna can be multiplexed in the same physical resource block (PRB). Orthogonal sequences w0, w1, w2, w3 can be applied in any time domain (after FFT modulation) or in any frequency domain (before FFT modulation).

For SR and persistent scheduling, ACK / NACK resources composed of CS, OC, and PRB (Physical Resource Block) may be given to the UE through RRC (Radio Resource Control). For dynamic ACK / NACK and non-persistent scheduling, the ACK / NACK resources may be implicitly given to the UE by the lowest CCE index of the PDCCH corresponding to the 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 a 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 CS and then mapped to the corresponding SC-FDMA symbol. SC-FDMA symbol level CS hopping may be applied to randomize inter-cell interference. The RS may be multiplexed by the CDM using a cyclic shift. For example, assuming that the number of available CSs is 12 or 6, 12 or 6 terminals may be multiplexed in the same PRB, respectively. That is, within the PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b, a plurality of terminals can be multiplexed by CS + OC + PRB and CS + PRB, respectively.

Orthogonal sequences (OC) of length-4 and length-3 for PUCCH format 1 / 1a / 1b are shown in Tables 7 and 8 below.

Orthogonal sequence (OC) for RS in PUCCH format 1a / 1b is shown in Table 9 below.

인 경우에 해당한다.FIG. 17 illustrates ACK / NACK channelization for PUCCH formats 1a and 1b. 17 is

Corresponds to

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

Cyclic Shift (CS) hopping and Orthogonal Cover (OC) remapping may be applied as follows.

(1) Symbol-Based Cell-Specific CS Hopping for Randomization of Inter-cell Interference

(2) slot-level CS / OC remapping

1) for inter-cell interference randomization

2) Slot based access for mapping between ACK / NACK channel and resource (k)

Meanwhile, the resource n _r for PUCCH formats 1a / 1b includes the following combination.

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

(2) OC (orthogonal cover at slot level) (n _oc )

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

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

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

은 (20,A) RM 코드를 이용하여 채널 코딩된다. 표 10은 (20,A) 코드를 위한 기본 시퀀스를 나타낸 표이다.

와

는 MSB(Most Significant Bit)와 LSB(Least Significant Bit)를 나타낸다. 확장 CP의 경우, CQI와 ACK/NACK이 동시 전송되는 경우를 제외하면 최대 정보 비트는 11비트이다. RM 코드를 사용하여 20비트로 코딩한 후에 QPSK 변조가 적용될 수 있다. QPSK 변조 전, 코딩된 비트는 스크램블 될 수 있다.For example, channel coding for UL CQI in an LTE system is described as follows. Bit stream

Is channel coded using the (20, A) RM code. Table 10 shows a basic sequence for the (20, A) code.

Wow

Indicates a Most Significant Bit (MSB) and a Least Significant Bit (LSB). In the case of the extended 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. Prior to QPSK modulation, the coded bits may be scrambled.

는 수학식 9에 의해 생성될 수 있다.Channel coding bits

May be generated by Equation 9.

Where i = 0, 1, 2,... Satisfies B-1.

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

Table 13 shows a UCI field for RI feedback for wideband reporting.

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, existing LTE systems support bandwidths of 1.4, 3, 5, 10, 15, and 20 MHz, and improved LTE-A (LTE-Advanced) systems from LTE systems use only the bandwidths supported by LTE It can support bandwidths 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 interchangeably 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. 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. The frequency carriers managed in one MAC have the advantage of being more flexible in terms of resource management since they do not need to be contiguous with each other. In FIG. 22 and FIG. 23, one PHY means one component carrier for convenience. Here, one PHY does not necessarily mean an independent RF (Radio Frequency) device. In general, an independent RF device refers to a single PHY, but is not necessarily limited thereto, and one RF device may include multiple PHYs.

24 illustrates a concept in which a plurality of MACs manages multicarriers in a base station. 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 structures illustrated in FIGS. 22 and 23, as shown in FIGS. 24 to 27, multiple carriers may control several carriers instead of one MAC.

As shown in FIGS. 24 and 25, each carrier may be controlled by one MAC, and as shown in FIGS. 26 and 27, each carrier is controlled by one MAC and one by one for some carriers. One or more carriers can be controlled by one MAC.

The system is a system that includes a number of carriers from one to N, and each carrier may be used contiguous or non-contiguous. This can be applied to uplink / downlink without any distinction. The TDD system is configured to operate N number of carriers including transmission of the downlink and uplink in each carrier, and the FDD system is configured to use a plurality of carriers on the uplink and the downlink, respectively. In case of the FDD system, asymmetric carrier merging in which the number of carriers merged in the uplink and the downlink and / or the bandwidth of the carrier is different may be supported.

When the number of component carriers aggregated in the uplink and the downlink is the same, it is possible to configure all the component carriers to be compatible with the existing system. 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 PDSCH is described on the assumption that it is transmitted on the downlink component carrier # 0, but cross-carrier scheduling is applied. It is apparent that the corresponding PDSCH can be transmitted on another downlink component carrier. The term “component carrier” may be replaced with another equivalent term (eg cell).

FIG. 28 exemplifies a scenario in which uplink control information (UCI) is transmitted in a wireless communication system supporting carrier aggregation. For convenience, this example assumes the case where 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 (CSI) (eg, CQI, PMI, RI) and scheduling request information (eg, SR) without limitation. have.

28 illustrates asymmetric carrier merging with five DL CCs linked with one UL CC. The illustrated asymmetric carrier merging may be set in terms of UCI transmission. That is, the DL CC-UL CC linkage for UCI and the DL CC-UL CC linkage for data may be set differently. For convenience, assuming that one DL CC can transmit at most two codewords, the UL ACK / NACK 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. To support the DTX state per DL CC, at least 12 bits (= 5 ⁵ = 3125 = 11.61 bits) are required for ACK / NACK transmission. Since the existing PUCCH format 1a / 1b can send ACK / NACK to 2 bits, this structure can not transmit the increased ACK / NACK information. Although carrier aggregation is illustrated as an increase in the amount of UCI information, this situation may occur due to an increase in the number of antennas, the presence of a backhaul subframe in a TDD system, a relay system, and the like. Similar to ACK / NACK, the amount of control information to be transmitted is increased even when control information associated with a plurality of DL CCs is transmitted through one UL CC. For example, if the CQI / PMI / RI for multiple DL CCs need to be transmitted, the UCI payload may increase.

The DL primary CC may be defined as a DL CC linked with an UL primary CC. Linkage here encompasses both implicit and explicit linkage. In LTE, one DL CC and one UL CC are uniquely paired. For example, by the LTE pairing, a DL CC linked with a UL primary CC may be referred to as a DL primary CC. You can think of this as an implicit linkage. Explicit linkage means that the network configures the linkage in advance and can be grouped with RRC. In the explicit linkage, a DL CC paired with a UL primary CC may be referred to as a primary DL CC. Here, the UL primary (or anchor) CC may be a UL CC on which the PUCCH is transmitted. Alternatively, the UL primary CC may be a UL CC through which UCI is transmitted through PUCCH or PUSCH. Alternatively, the DL primary CC may be configured through higher layer signaling. Alternatively, the DL primary CC may be a DL CC to which the UE performs initial access. In addition, the 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.

LTE-A 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. Accordingly, the cell may be configured with only downlink resources or with downlink resources and uplink resources. If carrier aggregation is supported, the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource may be indicated by system information. A cell operating on the primary frequency (or PCC) may be referred to as a primary cell (PCell), and a cell operating on the secondary frequency (or SCC) may be referred to as a secondary cell (SCell). In brief, the DL CC and the UL CC may be referred to as a DL cell and a UL cell, respectively. In addition, the anchor (or primary) DL CC and the anchor (or primary) UL CC may be referred to as DL Primary Cell (UL) and UL PCell, respectively. The PCell is used by the terminal to perform an initial connection establishment process or to perform a connection re-establishment process. The PCell may refer to the cell indicated in the handover process. The SCell is configurable after the RRC connection is established and can be used to provide additional radio resources. PCell and SCell may be collectively referred to as a serving cell. Therefore, in the case of the UE that is in the RRC_CONNECTED state, but carrier aggregation is not configured or does not support carrier aggregation, there is only one serving cell configured only with the PCell. On the other hand, in the case of the UE in the RRC_CONNECTED state and the carrier aggregation is configured, one or more serving cells exist, and the entire serving cell includes the PCell and the entire SCell. For carrier aggregation, after the initial security activation process is initiated, the network may configure one or more SCells for the UE supporting carrier aggregation in addition to the PCell initially configured in the connection establishment process.

DL-UL pairing may correspond to FDD only. Since TDD uses the same frequency, separate DL-UL pairing may not be defined. In addition, the DL-UL linkage may be determined from the UL linkage through UL EEARU Radio Absolute Radio Frequency Channel Number (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 CC # 0 and UL CC # 0 have a SIB2 linkage relationship with each other, and the remaining DL CCs may have a SIB2 linkage relationship with other UL CCs not configured for the UE. Can be.

A new method is needed to support the scenario as shown in FIG. Hereinafter, a PUCCH format for feeding back UCI (eg, multiple A / N bits) in a communication system supporting carrier aggregation is referred to as a CA PUCCH format (or PUCCH format 3). For example, PUCCH format 3 can be used to transmit A / N information (including DTX state) corresponding to PDSCH (or PDCCH) transmitted from multiple DL serving cells.

29A to 29F illustrate the structure and signal processing procedure of PUCCH format 3.

29A illustrates a case where PUCCH format 3 is applied to a structure of PUCCH format 1 (standard CP). Referring to FIG. 29A, a channel coding block includes information bits a_0, a_1,... (or codewords) b_0, b_1, ..., a_M-1 (e.g., multiple ACK / NACK bits) , b_N-1 is generated. M represents the size of the information bits, and N represents the size of the coding bits. The information bits include 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_1, ... , a_M-1 are joint-coded regardless of the type / number / size of the UCI constituting the information bits. For example, when the information bits include multiple ACK / NACK for a plurality of DL CCs, channel coding is performed for each DL CC and not for individual ACK / NACK bits, but for all bit information, A single code word is generated. Channel coding may include but is not limited to simple repetition, simplex coding, Reed Muller coding, punctured RM coding, tail-biting convolutional coding (TBCC), low-density parity- check) 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 through a separate functional block.

The modulator comprises coding bits b_0, b_1,... modulates the modulation symbols c_0, c_1,... Create c_L-1. L represents the size of the modulation symbol. The modulation method is performed by modifying the magnitude and phase of the transmission signal. The modulation method includes, for example, n-PSK (Phase Shift Keying) and n-QAM (Quadrature Amplitude Modulation) (n is an integer of 2 or more). Specifically, the modulation method may include BPSK (Binary PSK), Quadrature PSK (QPSK), 8-PSK, QAM, 16-QAM, 64-QAM, and the like.

The divider divides the modulation symbols c_0, c_1,... , c_L-1 is divided into slots. The order / pattern / method for dividing a modulation symbol into each slot is not particularly limited. For example, the frequency divider can divide the modulation symbols into slots in order from the front (local type). In this case, as shown, modulation symbols c_0, c_1, ... , c_L / 2-1 is divided into slot 0 and modulation symbols c_L / 2, c_L / 2 + 1, ... , c_L-1 may be divided into slot 1. In addition, modulation symbols may 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.

A DFT precoder performs DFT precoding (e.g., 12-point DFT) on the modulation symbols that are divided into each slot to produce a single carrier waveform. Referring to the figure, modulation symbols divided into slot 0 are c_0, c_1,... , c_L / 2-1 is the DFT symbol d_0, d_1, ... , d_L / 2-1, and modulated symbols c_L / 2, c_L / 2 + 1, ..., , c_L-1 is the DFT symbol d_L / 2, d_L / 2 + 1, ... , DFT is precoded with d_L-1. DFT precoding may be replaced by a corresponding linear operation (e.g., walsh precoding).

A spreading block spreads the DFT-performed signal at the SC-FDMA symbol level (time domain). Time-domain spreading at the SC-FDMA symbol level is performed using a spreading code (or spreading sequence). The spreading code includes a quasi-orthogonal code and an orthogonal code. Quasi-orthogonal codes include, but are not limited to, PN (Pseudo Noise) codes. Orthogonal codes include, but are not limited to, Walsh codes, DFT codes. Orthogonal Code (OC) may be mixed with an orthogonal sequence, an Orthogonal Cover (OC) and an Orthogonal Cover Code (OCC). Although the present specification focuses on orthogonal codes as a representative example of spreading codes for ease of explanation, it should be noted that orthogonal codes may be replaced with quasi-orthogonal codes by way of 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, if four SC-FDMA symbols in one slot are used for control information transmission, (quasi) orthogonal codes of length 4 (w0, w1, w2, w3) may be used for each slot. SF denotes the spread of control information, and may be related to a multiplexing order of an MS or an antenna multiplexing order. SF is 1, 2, 3, 4, ... And may be defined in advance between the BS and the MS or informed to the MS through DCI or RRC signaling. 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 the IFFT. A CP is added to the time domain signal, and the generated SC-FDMA symbol is transmitted through the RF end.

Assuming a case of transmitting ACK / NACK for five DL CCs, each process is illustrated in more detail. If each DL CC is capable of transmitting two PDSCHs, the ACK / NACK bit may be 12 bits if it includes a DTX state. Assuming QPSK modulation and SF = 4 time spreading, the coding block size (after rate matching) may be 48 bits. The coded bits are modulated into 24 QPSK symbols, and the generated QPSK symbols are divided into 12 slots. In each slot, 12 QPSK symbols are converted into 12 DFT symbols through a 12-point DFT operation. Twelve DFT symbols in each slot are spread and mapped to four SC-FDMA symbols using SF = 4 spreading code in the time domain. The coding rate is 0.0625 (= 12/192) since 12 bits are transmitted through [2 bits * 12 subcarriers * 8 SC-FDMA symbols]. In addition, when SF = 4, up to four terminals may be multiplexed per 1 PRB.

The signal processing described with reference to FIG. 29A is an example, and a signal mapped to the PRB in FIG. 29A may be obtained through various equivalent signal processing. 29B to 29G illustrate signal processing equivalents to those illustrated in FIG. 29A.

FIG. 29B is a reversed order of processing of the DFT precoder and the spreading block in FIG. 29A. In FIG. 29A, the function of the spreading block is the same as multiplying the DFT symbol string output from the DFT precoder by a specific constant at the SC-FDMA symbol level, and thus the values of the signals mapped to the SC-FDMA symbol are the same even if their order is changed. . Therefore, the signal processing for PUCCH format 3 can be performed in the order of channel coding, modulation, division, spreading, and DFT precoding. In this case, the dispensing process and the spreading process can be performed by one functional block. As an example, each modulation symbol may be spread at the SC-FDMA symbol level simultaneously with the division while dividing the modulation symbols into the respective slots. As another example, when modulation symbols are divided into respective slots, each modulation symbol may be copied to correspond to the size of a spreading code, and each of the modulation symbols and each element of the spreading code may be multiplied one-to-one. Therefore, the modulation symbol streams generated for each slot are spread with a plurality of SC-FDMA symbols at the SC-FDMA symbol level. Thereafter, the complex symbol streams corresponding to the respective SC-FDMA symbols are DFT precoded on a SC-FDMA symbol basis.

FIG. 29C changes the processing order of the modulator and divider in FIG. 29A. Accordingly, the process for PUCCH format 3 may be performed by joint channel coding and division at a subframe level, followed by modulation, DFT precoding, and spreading at each slot level.

FIG. 29D further changes the processing order of the DFT precoder and the spreading block in FIG. 29C. As mentioned above, the function of the spreading block is the same as multiplying the DFT symbol sequence output from the DFT precoder by a specific constant at the SC-FDMA symbol level, so that even if their order is changed, the value of the signal mapped to the SC- Do. Therefore, the signal processing for PUCCH format 3 performs joint channel coding and frequency division at the subframe level, and modulation is performed at each slot level. The modulation symbol sequence generated for each slot is spread into a plurality of SC-FDMA symbols at the SC-FDMA symbol level, and the modulation symbol string corresponding to each SC-FDMA symbol is in the order of DFT precoding in units of SC-FDMA symbols. In this case, the modulation process and the spreading process may be performed by one functional block. In one example, while modulating the coded bits, the generated modulation symbols may be immediately spread at the SC-FDMA symbol level. As another example, the modulation symbols generated at the time of modulating the coding bits may be copied corresponding to the size of the spreading code, and the respective elements of these modulation symbols and the spreading code may be multiplied one by one.

FIG. 29E illustrates a case where PUCCH format 3 is applied to a structure of PUCCH format 2 (standard CP), and FIG. 29F illustrates a case where PUCCH format 3 is applied to a structure of PUCCH format 2 (extended CP). The basic signal processing procedure is the same as described with reference to Figs. 29A to 29D. As the PUCCH format 2 structure of the existing LTE is reused, the number / locations of the UCI SC-FDMA symbols and the RS SC-FDMA symbols in the PUCCH format 3 are different from those of FIG. 29A.

Table 14 shows the positions of RS SC-FDMA symbols in the PUCCH format 3 shown. In the case of the standard cyclic prefix, there are 7 SC-FDMA symbols (index: 0 to 6) in the slot and 6 (index: 0 to 5) SC-FDMA symbols in the slot in the case of the extended cyclic prefix.

Here, the RS may inherit the structure of the existing LTE. For example, the RS sequence may be defined by the cyclic shift of the base sequence (see Equation 1).

The signal processing procedure of the PUCCH format 3 will be described using an equation. For convenience, a case of using an OCC having a length of 5 (eg, FIGS. 29E to 29F) is assumed.

이 단말-특정 스크램블링 시퀀스로 스크램블된다. 비트 블록

은 도 29a의 코딩 비트 b_0, b_1, …, b_N-1에 대응할 수 있다. 비트 블록

은 ACK/NACK 비트, CSI 비트, SR 비트 중 적어도 하나를 포함한다. 스크램블된 비트 블록

은 하기 식에 의해 생성될 수 있다.First, bit block

This is scrambled with a terminal-specific scrambling sequence. Bit block

Is the coding bits b_0, b_1,... , b_N-1. Bit block

Includes at least one of an ACK / NACK bit, a CSI bit, and an SR bit. Scrambled bit block

Can be produced by the following formula.

Here, c ( i ) represents a scrambling sequence. c ( i ) comprises a pseudo-random sequence defined by a length-31 gold sequence and can be generated according to the following equation. mod represents a modulo operation.

로 주어진다. c _init는 매 서브프레임의 시작 시에

로 초기화될 수 있다. n _s 는 무선 프레임 내에서의 슬롯 번호이고,

은 물리 계층 셀 식별자(physical layer cell identity)이고 n _RNTI는 무선 네트워크 임시 식별자(Radio network temporary identifier)이다.Where N _C = 1600. The first m-sequence is initialized to x ₁ (0) = 1, x ₁ ( n ) = 0, n = 1,2, ..., 30. Initialization of the second m-sequence

. c _init at the beginning of every subframe

Lt; / RTI > n _s is the slot number in the radio frame,

Is a physical layer cell identity and n _RNTI is a radio network temporary identifier.

은 변조되며, 복소 변조 심볼 블록 d(0),...,d(M _symb-1)이 생성된다. QPSK 변조 시,

이다. 복소 변조 심볼 블록 d(0),...,d(M _symb-1)은 도 29a의 변조 심볼 c_0, c_1, …, c_N-1에 대응한다.Scrambled bit block

Is modulated, and a complex modulation symbol block d (0), ..., d ( M _symb -1) is generated. In QPSK modulation,

to be. The complex modulation symbol blocks d (0), ..., d ( M _symb -1) are the modulation symbols c_0, c_1,... , c_N-1.

를 이용하여 블록-방식(block-wise) 확산된다. 하기 식에 의해

개의 복소 심볼 세트가 생성된다. 하기 식에 의해 도 29b의 분주/확산 과정이 이뤄진다. 각각의 복소 심볼 세트는 하나의 SC-FDMA 심볼에 대응하며

(예, 12)개의 복소 변조 값을 갖는다.Complex modulation symbol blocks d (0), ..., d ( M _symb -1) are orthogonal sequences

Using block-wise spread. By the following formula

Complex symbol sets are generated. The dispensing / diffusion process of FIG. 29B is performed by the following equation. Each complex symbol set corresponds to one SC-FDMA symbol

(E.g., 12) complex modulation values.

과

은 각각 슬롯 0 및 슬롯 1에서 PUCCH 전송에 사용되는 SC-FDMA 심볼의 개수에 해당한다. 노멀 PUCCH 포맷 3을 사용하는 경우

이다. 쇼튼드 PUCCH 포맷 3을 사용하는 경우

,

이다.

및

는 각각 슬롯 0과 슬롯 1에 적용되는 직교 시퀀스를 나타내며 하기 표 15에 의해 주어진다.

는 직교 시퀀스 인덱스 (혹은 직교 코드 인덱스)를 나타낸다.

는 내림(flooring) 함수를 나타낸다.

는

로 주어질 수 있다. c(i)는 수학식 11에 의해 주어질 수 있고, 매 무선 프레임의 초기에

로 초기화될 수 있다.

이다.

는 안테나 포트 번호에 대응하는 인덱스이다.here,

and

Corresponds to the number of SC-FDMA symbols used for PUCCH transmission in slot 0 and slot 1, respectively. When using normal PUCCH format 3

to be. When using Shoton PUCCH format 3

,

to be.

And

Denotes an orthogonal sequence applied to slot 0 and slot 1, respectively, and is given by Table 15 below.

Denotes an orthogonal sequence index (or an orthogonal code index).

Represents a flooring function.

The

Lt; / RTI > c ( i ) can be given by Equation 11, at the beginning of every radio frame

Lt; / RTI >

to be.

Is an index corresponding to the antenna port number.

를 나타낸다.Table 15 shows the orthogonal sequences according to the conventional scheme.

Indicates.

직교 시퀀스 (혹은 코드)는 하기 식에 의해 생성된다.In Table 15,

An orthogonal sequence (or code) is generated by the following equation.

에 의해 식별된다. 예를 들어,

는

으로 주어질 수 있다.

는 SCell PDCCH의 TPC(Transmit Power Control) 필드를 통해 지시될 수 있다. 보다 구체적으로, 각 슬롯을 위한

는 하기 식에 의해 주어질 수 있다.Meanwhile, the resource for PUCCH format 3 is a resource index

Lt; / RTI > E.g,

The

Can be given by

May be indicated through a TPC (Transmit Power Control) field of the SCell PDCCH. More specifically, for each slot

Can be given by the following equation.

은 슬롯 0을 위한 시퀀스 인덱스 값(

)을 나타내고,

은 슬롯 1을 위한 시퀀스 인덱스 값(

)을 나타낸다. 노멀 PUCCH 포맷 3의 경우

이다. 쇼튼드 PUCCH 포맷 3의 경우

,

이다.here,

Is the sequence index value for slot 0 (

),

Is the sequence index value for slot 1 (

). In case of normal PUCCH format 3

to be. For shortened PUCCH format 3

,

to be.

), 슬롯 0과 슬롯 1에서 동일 인덱스(

)의 직교 시퀀스가 사용된다.According to the above equation, in the case of shorted PUCCH format 3 (i.e.

), The same index (in slot 0 and slot 1)

Orthogonal sequences are used.

The block spread complex symbol set may be cyclic shifted according to the following equation.

은 슬롯 내에서 SC-FDMA 심볼 번호를 나타낸다.

는 수학식 12에서 정의한 바와 같다.

이다.Where n _s represents the slot number in the radio frame

Denotes an SC-FDMA symbol number within a slot.

Is as defined in Equation 12.

to be.

이 생성된다.Each cyclic shifted complex symbol set is transform precoded according to the following equation. As a result, the complex symbol block

Is generated.

는 전력 제어 이후에 물리 자원에 맵핑된다. 전력 제어에 대해서는 뒤에서 자세히 설명한다. PUCCH는 서브프레임 내의 각 슬롯에서 하나의 자원 블록을 사용한다. 해당 자원 블록 내에서, 는 RS 전송(표 14 참조)에 사용되지 않는, 안테나 포트 p 상의 자원 요소

에 맵핑된다. 서브프레임의 첫 번째 슬롯부터 시작해서, k, 이후 l, 이후 슬롯 번호가 증가하는 순으로 맵핑이 이뤄진다. k는 부반송파 인덱스를 나타내고, l은 슬롯 내의 SC-FDMA 심볼 인덱스를 나타낸다. P는 PUCCH 전송에 사용되는 안테나 포트의 개수를 나타낸다. p는 PUCCH 전송에 사용되는 안테나 포트 번호를 나타내고 p와

의 관계는 아래 표와 같다.Complex symbol block

Is mapped to a physical resource after power control. Power control is discussed in detail later. PUCCH uses one resource block in each slot in a subframe. Within that resource block, Is a resource element on antenna port p that is not used for RS transmission (see Table 14).

Is mapped to. Starting from the first slot of the subframe, mapping is performed in order of k, then l, and then the slot number increases. k denotes a subcarrier index and l denotes an SC-FDMA symbol index in a slot. P represents the number of antenna ports used for PUCCH transmission. p represents the antenna port number used for PUCCH transmission and p and

The relationship between is shown in the table below.

가 프라이머리 셀인 경우, 서브프레임 i에서 PUCCH 전송을 위한 단말 전송 전력 P _PUCCH(i)은 다음과 같이 주어진다.The conventional PUCCH power control is described below. The following description focuses on PUCCH format 3. Serving cell

If is a primary cell, UE transmit power P _PUCCH ( i ) for PUCCH transmission in subframe i is given as follows.

는 서빙 셀

를 위해 설정된 단말의 최대 전송 전력을 나타낸다.

Lt; / RTI >

It indicates the maximum transmission power of the terminal configured for.

는

와

의 합으로 구성되는 파라미터이다.

와

는 상위 계층(예, RRC 계층)에 의해 제공된다.

The

Wow

As shown in FIG.

Wow

Is provided by a higher layer (eg, an RRC layer).

PL _c represents a downlink path loss estimate of the serving cell c.

The parameter Δ _{F_PUCCH} ( F ) is provided by the higher layer. Each Δ _{F_PUCCH} ( F ) value represents a value corresponding to the corresponding PUCCH format compared to the PUCCH format 1a.

If the terminal is configured to transmit PUCCH in two antenna ports by a higher layer, the parameter Δ _TxD ( F ′) is provided by the higher layer. Otherwise, ie, if the PUCCH is configured to be transmitted on a single antenna port, Δ _TxD ( F ′) is zero. That is, Δ _TxD ( F ′) corresponds to a power compensation value considering the antenna port transmission mode.

h (·) is a PUCCH format dependent value. h (·) is a function having at least one of n _CQI , n _HARQ and n _SR as a parameter.

로 주어진다.For PUCCH format 3,

.

Here, n _CQI represents a power compensation value related to channel quality information. Specifically, n _CQI corresponds to the number of information bits for channel quality information. n _SR represents a power compensation value associated with the SR. Specifically, n _SR corresponds to the number of SR bits. If a time point to transmit HARQ-ACK through PUCCH format 3 is a subframe configured for SR transmission (simply, an SR subframe), the UE is connected to the SR bit (eg, 1-bit) jointly coded through PUCCH format 3. Send one or more HARQ-ACK bits. Therefore, the size of the control information transmitted through the PUCCH format 3 in the SR subframe is always one larger than the HARQ-ACK payload size. Accordingly, n _SR is 1 when subframe i is an SR subframe and 0 when a non-SR subframe.

n _HARQ indicates a power compensation value associated with HARQ-ACK. Specifically, n _HARQ corresponds to the number of (effective) information bits of HARQ-ACK. In addition, n _HARQ is defined as the number of transport blocks received in the corresponding downlink subframe. That is, power control is scheduled by the base station and is determined by the number of successfully decoded PDCCH for the packet by the terminal. In contrast, the HARQ-ACK payload size is determined by the number of configured DL cells. Therefore, when the terminal is configured to have one serving cell, n _HARQ is the number of HARQ bits transmitted in subframe i . When the terminal has a plurality of serving cells, n _HARQ may be given as follows. In the case of TDD, when the UE receives the SPS release PDCCH in one of subframes i - k _m ( k _m ∈ K , 0≤ m ≤ M -1) in the serving cell c, n _{HARQ , c} = (subframe i -number of transport blocks received at k _m ) +1. The UE has not received the SPS release PDCCH in one of the subframes i - k _m ( k _m ∈ K : { k ₀ , k ₁ , ... k _{M -1} }, 0≤ m ≤ M -1) in the serving cell c In this case, n _{HARQ , c} = (number of transport blocks received in subframe i - k _m ). For FDD, n _HARQ is given similarly to TDD with M = 1 and k ₀ = 4.

로 주어질 수 있다. C는 구성된 서빙 셀의 개수를 나타낸다.

는 서빙 셀 c의 서브프레임 i-k _m 에서 수신된 전송 블록과 SPS 릴리즈 PDCCH의 개수를 나타낸다. FDD의 경우,

로 주어질 수 있다.

는 서빙 셀 c의 서브프레임 i-4에서 수신된 전송 블록과 SPS 릴리즈 PDCCH의 개수를 나타낸다.Specifically, for TDD,

Lt; / RTI > C represents the number of configured serving cells.

Denotes the number of transport blocks and SPS release PDCCHs received in subframes i - k _m of serving cell c. In the case of FDD,

Lt; / RTI >

Denotes the number of transport blocks and SPS release PDCCHs received in subframe i- 4 of serving cell c.

로 주어질 수 있다. g(0)은 리셋 후 첫 번째 값이다. δ _PUCCH는 단말 특정 정정(correction) 값이며 TPC 커맨드라고도 불린다. δ _PUCCH는 PCell의 경우 DCI 포맷 1A/1B/1D/1/2A/2/2B/2C를 가진 PDCCH에 포함된다. 또한, δ _PUCCH는 DCI 포맷 3/3A를 가진 PDCCH 상에서 다른 단말 특정 PUCCH 정정 값과 조인트 코딩된다. g ( i ) represents the current PUCCH power control adjustment state. Specifically,

Lt; / RTI > g (0) is the first value after reset. δ _PUCCH is a UE specific correction value and is also called a TPC command. δ _PUCCH is included in the PDCCH with DCI format 1A / 1B / 1D / 1 / 2A / 2 / 2B / 2C for the PCell. In addition, δ _PUCCH is joint coded with another UE specific PUCCH correction value on a PDCCH having DCI format 3 / 3A.

Embodiment: PUCCH Power Control When Simultaneous PUCCH and PUSCH Transmission Modes Are Set

30 exemplifies a UL transmission process according to the existing 3GPP Rel-8 / 9. To illustrate. FIG. 30 is mainly focused on BSR (Buffer Status Reporting) and SR processes of the MAC layer.

Referring to FIG. 30, when UL data is available for transmission to a higher layer entity (eg, RLC entity, PDCP entity) (S3002), the BSR process is triggered (S3004). The BSR process is used to provide the serving base station with information about the amount of available data in the UL buffer of the terminal. When the BSR is triggered, the MAC layer checks whether there is an UL resource (eg, a UL-SCH resource) allocated for new transmission (S3006). If there is an allocated UL-SCH resource, the MAC layer generates a MAC PDU (S3008). The MAC PDU may include BSR MAC CE (Control Element) and / or pending data available for transmission. Thereafter, the MAC layer delivers the generated MAC PDU to the physical layer (S3010). The MAC PDU is delivered to the physical layer through the UL-SCH channel, and the MAC PDU becomes a UL-SCH transport block from the physical layer perspective. Thereafter, the triggered BSR procedure is canceled (S3012). If there is pending data in the buffer after the BSR MAC CE is transmitted, the base station may allocate the UL-SCH resource to the terminal in consideration of the BSR, and the terminal may transmit the pending data using the allocated resource.

On the other hand, if there is no UL resource allocated for new transmission, the SR process is triggered (S3014). The SR process is used to request UL-SCH resources for new transmission. If the SR process is triggered, the MAC layer instructs to transmit the SR to the physical layer (S3016). The physical layer transmits the SR on the SR subframe (subframe configured for SR transmission) according to the indication of the MAC layer. Thereafter, the MAC layer checks whether there is a UL-SCH resource available for BSR or new data transmission (S3018). If no UL-SCH resources are available, the SR process is pending and steps S3014 to S3016 are repeated. On the other hand, if there is an available UL-SCH resource, that is, if the UL-SCH resource is allocated through the UL grant, the triggered SR process is canceled (S3020). If UL-SCH resources are available for the SR process, steps S3006 to S3012 are performed according to the BSR process.

In summary, in the existing 3GPP Rel-8 / 9, if the SR is triggered and there is no PUSCH transmission in the SR subframe (that is, there is no UL-SCH resource / UL-SCH transport block for the SR subframe), the UE is positive. The SR is transmitted through PUCCH format 1. On the other hand, if the SR is triggered and there is PUSCH transmission in the SR subframe (that is, there is a UL-SCH resource / UL-SCH transport block for the SR subframe), the UE drops the SR transmission and instead the BSR MAC CE and And / or transmit the pending data through the PUSCH.

Meanwhile, in the existing 3GPP Rel-8 / 9, an SR may be triggered and an aperiodic CQI only PUSCH may be triggered in an SR subframe. The CQI only PUSCH signal contains only the CQI and does not contain data (ie, UL-SCH transport block). Therefore, when the CQI only PUSCH is triggered, the triggered SR is not canceled because there is no UL-SCH resource available. That is, simultaneous transmission of the CQI only PUSCH signal and the SR PUCCH signal is required in the same subframe. However, simultaneous 3GPP Rel-8 / 9 does not allow simultaneous PUCCH + PUSCH transmission. Therefore, in this example, the UE regards CQI only PUSCH triggering as mis-configuration. As a result, the UE drops the aperiodic CQI PUSCH transmission and transmits only the positive SR through the PUCCH format 1. For reference, when the value of the CQI request field in the PDCCH signal for the UL grant is 1, the MCS index (I _MCS ) is 29, and the number of allocated PRBs is 4 or less (N _PRB ≤ 4), the UE may apply corresponding signaling to the CQI. It is interpreted as only PUSCH allocation.

As described above, in the existing 3GPP Rel-8 / 9, simultaneous PUCCH and PUSCH transmission are prohibited for UL transmission having a low peak-to-average power ratio (PAPR) characteristic. However, in 3GPP Rel-10, simultaneous PUCCH and PUSCH transmission modes can be configured through RRC signaling. That is, the UE transmits UCI (eg, HARQ-ACK and / or SR) through PUCCH on the same subframe, and transmits only data (eg, UL-SCH transport block) or CSI (eg, CQI) through PUSCH. It is possible.

Meanwhile, according to the power control method of the conventional PUCCH format 3 described with reference to Equation 17, when control information is transmitted in an SR subframe through the PUCCH format 3, the control information is always an SR bit (eg, 1-bit). The added SR bit was used to increase the transmit power of the PUCCH ( n _SR = 1). In the conventional power control method, it is assumed that simultaneous PUCCH + PUSCH transmission is not configured. That is, only PUCCH or PUSCH may be transmitted in one subframe, and when PUCCH and PUSCH are to be transmitted in the same subframe, control information that is scheduled to be transmitted through PUCCH is transmitted through PUSCH. Therefore, the presence of PUCCH transmission in the SR subframe means that there is no UL-SCH resource / UL-SCH transport block for the SR subframe. In this case, the SR bits added to the control information can always be used to carry valid information.

However, considering that the UE can be configured in simultaneous PUCCH and PUSCH transmission modes, it is required to perform power control more efficiently. For example, assuming a case in which simultaneous PUCCH and PUSCH transmission modes are configured, a simultaneous transmission scenario of a PUCCH format 3 signal and a PUSCH signal in an SR subframe is possible. In this case, the PUCCH format 3 signal may include an SR bit, and the PUSCH signal may include a UL-SCH transport block. In addition, the PUSCH signal may include only CSI. As described with reference to FIG. 30, if there is a UL-SCH resource / UL-SCH transport block for an SR subframe, the triggered SR is canceled. That is, the existence of the UL-SCH transport block in the PUSCH signal may itself mean a negative SR. Therefore, when the PUSCH signal includes a UL-SCH transport block, the SR bits included in the PUCCH format 3 signal carry redundant information. Also, in this case, since the SR bit may have any value (don't care), the value of the SR bit may be considered non-valid information. That is, when there is a UL-SCH transport block for an SR subframe, the SR bits included in the PUCCH format 3 signal correspond to dummy bits without information. Therefore, treating the case where the dummy bit is included in the PUCCH format 3 signal with and without the same during the PUCCH power control causes a waste of power efficiency.

Hereinafter, a method of efficiently performing PUCCH power control in consideration of simultaneous PUCCH and PUSCH transmission modes will be described. The following description focuses on the scheme of modifying h (·) according to the UL signal transmission scenario in Equation 17.

When simultaneous transmission of PUCCH + PUSCH is configured, the UL transmission scenario is as follows.

(1) When a PUCCH format 3 signal for a HARQ-ACK and a PUSCH signal are simultaneously transmitted in a non-SR subframe. The PUSCH signal may include data (eg, a UL-SCH transport block) or include only CSI.

(2) When a PUCCH format 3 signal for a HARQ-ACK and a PUSCH signal are simultaneously transmitted in an SR subframe. The PUSCH signal may include data (eg, a UL-SCH transport block) or include only CSI.

In case of (1), the SR information is not included in the control information for PUCCH format 3. Therefore, h (·) for power control of the PUCCH can be determined by the following equation.

In case of (2), the following cases can be considered when considering SR.

i) HARQ-ACK + SR can be transmitted through PUCCH format 3, and only CSI can be transmitted through PUSCH. In this case, since the SR bit is a meaningful value representing the actual SR information, power control of the PUCCH may be performed in consideration of the SR bit. In this case, h (·) for power control of the PUCCH may be determined by the following equation.

ii) HARQ-ACK + SR may be transmitted through PUCCH format 3, and UL-SCH transport blocks (eg, BSR and data) may be transmitted through PUSCH. In this example, the SR bit may be used for indicating actual SR information, regardless of whether a UL-SCH transport block is transmitted in an SR subframe. According to this example, when there is transmission of a UL-SCH transport block in an SR subframe, the SR bit should always indicate a value (eg, 0) indicating a negative SR. Therefore, when there is a UL-SCH transport block in the SR subframe, the SR bit in the PUCCH signal may be used for the purpose of error checking of control information transmitted through the PUCCH. Since the SR bit carries valid information, h (·) for power control of the PUCCH may be determined by the following equation.

iii) HARQ-ACK + SR may be transmitted through PUCCH format 3, and UL-SCH transport blocks (eg, BSR and data) may be transmitted through PUSCH. In this example, the SR bit may be treated as a dummy bit without any information. That is, when there is no UL-SCH transport block in the SR subframe, the SR bit included in the PUCCH signal represents the actual SR bit (that is, the actual SR information, the valid bit). In this case, the MAC layer of the terminal delivers the SR indication information to the PHY layer, the PHY layer sets the value of the SR bit according to the SR indication information. The case where there is no UL-SCH transport block in the SR subframe also includes the case where there is CSI only PUSCH transmission in the SR subframe (that is, aperiodic CSI without the UL-SCH transport block). On the other hand, when there is a UL-SCH transport block in the SR subframe, the SR bit included in the PUCCH signal represents a dummy bit (ie, dummy information, invalid bit). In this case, the MAC layer may not transmit the SR indication information to the PHY layer. Instead, the PHY layer may set the SR bit to a dummy value according to whether the corresponding condition is satisfied. The dummy bit may have any particular value set in advance. For example, the dummy bit may be set to a predetermined value of 0 or 1, preferably 0.

Specifically, the HARQ-ACK bit string [b ₀ b ₁ ... b _m-1 ] and control bits generated by multiplexing the SR bits s ₀ may be transmitted through PUCCH format 3, and a UL-SCH transport block (eg, BSR, data) may be transmitted through PUSCH. The multiplexing of the HARQ-ACK bit string and the SR bit is performed by the HARQ-ACK bit string [b ₀ b ₁ ... b _m-1 ] appends SR bits s ₀ to the end (or front) of [b ₀ b ₁ ... b _m-1 s ₀ ], and [b ₀ b ₁ ... b _m-1 s ₀ ] together (ie, joint coding). In this example, the SR bits serve only as bits that are fixedly inserted to eliminate ambiguity of the control information size. The SR bit is set to a predetermined value (eg 0 or 1, preferably 0) and the base station can ignore the SR bit when decoding the control information. Instead, the base station may determine whether the UE triggers the SR through the existence of a UL-SCH transport block (eg, BSR, data) of the PUSCH signal.

As described above, in this example, since the SR bit does not represent actual SR information, the SR bit may not be considered in power control. In other words, when simultaneous PUCCH + PUSCH transmission occurs in an SR subframe, HARQ-ARK + dummy SR may be transmitted through PUCCH format 3, and a UL-SCH transport block (eg, BSR, data) is transmitted through PUSCH. Can be. H (·) for power control of the PUCCH may be determined by the following equation.

In this example, it is possible to increase the power efficiency for the UL transmission power control is performed because of the PUCCH _SR by n = 0, not unlike the equation 17, n _SR = 1 even if the SR subframe. In this example, n _SR may mean the number of valid SR bits (in other words, SR bits that actually have information). In addition, when HARQ-ACK is transmitted in an SR subframe through PUCCH format 3, the decoding efficiency of the base station can be increased by always maintaining the same payload size of control information using dummy SR bits.

iv) HARQ-ACK may be transmitted through PUCCH format 3, and UL-SCH transport blocks (eg, BSR and data) may be transmitted through PUSCH. In this example, the SR bits are dropped. That is, if the payload size of the control information included in the PUCCH signal is N when there is no UL-SCH transport block in the SR subframe, the control information included in the PUCCH signal when the UL subframe is present in the SR subframe. The payload size of is N + 1.

SR bit is not transmitted, even if the PUCCH SR is transmitted in sub-frame, unlike the equation 17, the power control of the PUCCH _SR by n = 0 instead of n _SR = 1 is done. Therefore, h (·) for power control of the PUCCH can be determined by the following equation.

Regardless of whether the PUCCH + PUSCH simultaneous transmission mode is configured, the above-described scheme may be generalized as follows.

N _SR = 0 when transmitting a PUCCH format 3 signal in a non-SR subframe.

In case of transmitting a PUCCH format 3 signal in an SR subframe,

N _SR = 1 if there is no UL-SCH transport block.

If there is a UL-SCH transport block, n _SR = 1 (Equation 20), n _SR = 0 (Equations 21 to 22)

31 illustrates a process of transmitting control information through a PUCCH according to an embodiment of the present invention.

Referring to FIG. 31, the base station transmits a PDCCH and a PDSCH corresponding thereto to the terminal (S3102). At least one of the PDCCH and the PDSCH may be received on the SCell. Thereafter, the terminal generates control information for transmission through the PUCCH format 3. The control information includes HARQ-ACK information for the PDSCH. If HARQ-ACK is transmitted in an SR subframe, the control information further includes an SR bit. At the end (or before) of the HARQ-ACK bit string, SR bits are added, which are joint coded. A PUCCH format 3 signal is generated from the control information through the process illustrated in FIG. 29. The UE sets the PUCCH transmission power for PUCCH transmission (S3104), and the PUCCH format 3 signal is transmitted to the base station through a process such as power control (S3106).

In this example, when a PUCCH format 3 signal is transmitted in an SR subframe, the transmission power for PUCCH transmission is set in consideration of the existence of a UL-SCH transport block associated with the SR subframe. For example, using the transmission power setting method of Equation 17, h (·) may be replaced with Equation 23 in consideration of the existence of a UL-SCH transport block related to the SR subframe. The SR subframe means a subframe configured for SR transmission. The SR subframe is set by a higher layer (eg, RRC) and can be specified by a period / offset.

32 illustrates a base station and a terminal that can be applied to an embodiment of the present invention. When a relay is included in the wireless communication system, communication is performed between the base station and the relay in the backhaul link, and communication is performed between the relay and the terminal in the access link. Therefore, the base station or the UE ″ illustrated in the figure may be replaced with a relay according to the situation.

Referring to FIG. 32, a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120. Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116. The processor 112 may be configured to implement the procedures and / or methods suggested by the present invention. The memory 114 is connected to the processor 112 and stores various information related to the operation of the processor 112. The RF unit 116 is coupled to the processor 112 and transmits and / or receives wireless signals. The terminal 120 includes a processor 122, a memory 124 and an RF unit 126. The processor 122 may be configured to implement the procedures and / or methods proposed by the present 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 coupled to the processor 122 and transmits and / or receives radio signals. The base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature shall 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. It is also possible to construct embodiments of the present invention by combining some of the elements and / or features. 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. It is clear that the claims that are not expressly cited in the claims may be combined to form an embodiment or be included in a new claim by an amendment after the application.

In the present document, the embodiments of the present invention have been mainly described with reference to a signal transmission / reception relationship between a terminal and a base station. This transmission / reception relationship is equally or similarly extended to the signal transmission / reception between the terminal and the relay or between the base station and the relay. The specific operation described herein as being performed by the base station may be performed by its upper node, in some cases. That is, it is apparent that various operations performed for communication with a terminal in a network including a plurality of network nodes including a base station can be performed by a network node other than the base station or 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 a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include 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, 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 a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-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. 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.

The present invention can be used in a terminal, a 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 therefor.

Claims (16)

In a method for transmitting a physical uplink control channel (PUCCH) signal by a communication device in a wireless communication system,
Setting a transmit power for the PUCCH signal;
When the PUCCH signal is to be transmitted in a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) bits and SR bits.
The transmission power for the PUCCH is determined using the following equation:

Here, n _HARQ represents the number of information bits of HARQ-ACK, or the number of one or more transport blocks received in one or more subframes in two or more configured cells,
N is 2 or 3,
n _SR indicates 1 when the subframe does not have a transport block for an associated UL-SCH (Uplink Shared CHannel), and 0 when there is a transport block for an associated UL-SCH. The method of claim 1,
A transmission power for the PUCCH signal in subframe i is determined using the following equation:

Here, P _PUCCH ( i ) represents the transmission power for the PUCCH,
P _{CMAX, c} ( i ) represents the maximum transmit power set for serving cell c,
P _{O_PUCCH} represents a parameter set by a higher layer,
PL _c represents a downlink path loss estimate of the serving cell c,
Δ _{F_PUCCH} ( F ) represents a value corresponding to the PUCCH format,
Δ _TxD ( F ′) represents a value or 0 set by a higher layer,
g ( i ) represents the current PUCCH power control adjustment state. The method of claim 1,
The SR bit is added to the end of the one or more HARQ-ACK bits. The method of claim 3,
The SR bit is set to 1 for a positive SR and the SR bit to 0 for a negative SR. The method of claim 1,
And the communication device is set to simultaneous PUCCH and PUSCH (Physical Uplink Shared Channel) mode. delete The method of claim 1,
Wherein the one or more HARQ-ACK bits and the SR bits are joint coded. A communication device configured to transmit a physical uplink control channel (PUCCH) signal in a wireless communication system,
A radio frequency (RF) unit; And
Includes a processor,
The processor is configured to set a transmit power for the PUCCH signal,
When the PUCCH signal is to be transmitted in a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) bits and SR bits.
The communication power for the PUCCH is determined using the following equation:

Here, n _HARQ represents the number of information bits of HARQ-ACK, or the number of one or more transport blocks received in one or more subframes in two or more configured cells,
N is 2 or 3,
n _SR indicates 1 when the subframe does not have a transport block for an associated UL-SCH (Uplink Shared CHannel), and 0 when there is a transport block for an associated UL-SCH. 9. The method of claim 8,
The communication power for the PUCCH signal in subframe i is determined using the following equation:

Here, P _PUCCH ( i ) represents the transmission power for the PUCCH,
P _{CMAX, c} ( i ) represents the maximum transmit power set for serving cell c,
P _{O_PUCCH} represents a parameter set by a higher layer,
PL _c represents a downlink path loss estimate of the serving cell c,
Δ _{F_PUCCH} ( F ) represents a value corresponding to the PUCCH format,
Δ _TxD ( F ′) represents a value or 0 set by a higher layer,
g ( i ) represents the current PUCCH power control adjustment state. 9. The method of claim 8,
And the SR bit is added to the end of the one or more HARQ-ACK bits. The method of claim 10,
The SR bit is set to 1 for a positive SR and the SR bit to 0 for a negative SR. 9. The method of claim 8,
The communication device is a communication device set to the simultaneous PUCCH and PUSCH (Physical Uplink Shared Channel) mode. delete 9. The method of claim 8,
And the one or more HARQ-ACK bits and the SR bits are joint coded. The method of claim 1,
If there is at least one SPS release PDCCH (Semi-Persistent Scheduling releasse Physical Downlink Control CHannel), n _HARQ includes the number of the at least one SPS release PDCCH. 9. The method of claim 8,
If there is at least one SPS release PDCCH (Semi-Persistent Scheduling releasse Physical Downlink Control CHannel), n _HARQ includes the number of the at least one SPS release PDCCH.

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