KR20110066833A - A method and an apparatus for transmitting ack/nack signal in wierless communication system supporting carrier aggregation - Google Patents

Abstract

PURPOSE: A method and device for transmitting an ACK/NACK signal in a wireless mobile communication system supporting a carrier aggregation are provided to efficiently transmitting an ACK/NACK signal when the number of uplink component carriers is different from the number of downlink component carriers. CONSTITUTION: A plurality of uplink component carriers is received. At least one downlink component carrier is transmitted. The downlink component carrier comprises ACK/NACK(Acknowledgment/Negative Acknowledgment) signals about the uplink component carriers. The ACK/NACK signals are bundled and transmitted in the same PHICH(Physical Hybrid-ARQ Indicator Channel) resource area. The ACK signal is transmitted when all uplink component carriers are successfully received. The NACK signal is transmitted when at least one of the uplink component carriers fails to be received.

Description

In a wireless mobile communication system supporting a carrier set, a method and apparatus for transmitting an ACK / NACK signal TECHNICAL FIELD

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an ACK / NACK signal in a wireless mobile communication system supporting a carrier aggregation.

In a mobile communication system, a user equipment may receive information from a base station through downlink, and the user equipment may also transmit information through uplink. The information transmitted or received by the user device includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the user device.

FIG. 1 is a diagram illustrating physical channels used in a 3rd generation partnership project (3GPP) long term evolution (LTE) system, which is an example of a mobile communication system, and a general signal transmission method using the same.

The user equipment which is powered on again or enters a new cell while the power is turned off performs an initial cell search operation such as synchronizing with the base station in step S101. To this end, the user equipment may receive a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station to synchronize with the base station and obtain information such as a cell ID. have. Thereafter, the user equipment may receive a physical broadcast channel from the base station to obtain broadcast information in a cell. Meanwhile, the user equipment may check a downlink channel state by receiving a downlink reference signal (DL RS) in an initial cell search step.

After the initial cell search, the user equipment receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S102. More specific system information can be obtained.

On the other hand, the user equipment that has not completed the connection with the base station may perform a random access procedure such as step S103 to step S106 thereafter to complete the connection to the base station. To this end, the user equipment transmits a feature sequence as a preamble through a physical random access channel (PRACH) (S103), through a physical downlink control channel and a corresponding physical downlink shared channel. The response message for the random access may be received (S104). In case of contention-based random access except for handover, collision resolution such as transmission of additional physical random access channel (S105) and physical downlink control channel and corresponding physical downlink shared channel reception (S106) thereafter. You can perform a Content Resolution Resolution Procedure.

The user equipment which has performed the above-described procedure is then subjected to a physical downlink control channel / physical downlink shared channel (S107) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure. / Physical Uplink Control Channel (PUCCH) transmission (S108) may be performed.

2 is a diagram for describing a signal processing procedure for transmitting an uplink signal by a user equipment.

In order to transmit the uplink signal, the scrambling module 210 of the user device may scramble the transmission signal using the user device specific scrambling signal. The scrambled signal is input to the modulation mapper 220 and complexed according to the type of the transmission signal and / or the channel state by binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), or quadrature amplitude modulation (16QAM). Modulated into a complex symbol. Then, the modulated complex symbol is processed by the transform precoder 230, and then input to the resource element mapper 240, where the resource element mapper 240 transmits the complex symbol to the time-frequency resource element to be used for actual transmission. Can be mapped to The signal thus processed may be transmitted to the base station through the antenna via the SC-FDMA signal generator 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 code words in downlink. Thus, one or more codewords may each be sag as a complex symbol through the scrambling module 301 and the modulation mapper 302 as in the uplink of FIG. 2, after which the complex symbol is plural by the layer mapper 303. Each layer is mapped to a layer of, and each layer may be multiplied with a predetermined precoding matrix selected according to the channel state by the precoding module 304 and assigned to each transmit antenna. The transmission signal for each antenna thus processed is mapped to a time-frequency resource element to be used for transmission by the resource element mapper 305, and then each antenna is passed through an orthogonal frequency division multiple access (OFDM) signal generator 306. Can be transmitted through.

In a mobile communication system, when a user equipment transmits a signal in uplink, a peak-to-average ratio (PAPR) may be more problematic than in a case where a base station transmits a signal in downlink. Accordingly, as described above with reference to FIGS. 2 and 3, the uplink signal transmission uses the Single Carrier-Frequency Division Multiple Access (SC-FDMA) scheme differently from the OFDMA scheme used for the downlink signal transmission.

4 is a diagram for describing an SC-FDMA scheme for uplink signal transmission and an OFDMA scheme for downlink signal transmission in a mobile communication system.

Both the user equipment for uplink signal transmission and the base station for downlink signal transmission include a serial-to-parallel converter (401), a subcarrier mapper (403), an M-point IDFT module (404), and a CP ( Cyclic Prefix) is identical in that it includes an additional module 406.

However, the user equipment for transmitting signals in the SC-FDMA scheme further includes a parallel-to-serial converter (405) and an N-point DFT module (402), and the N-point DFT module (402). ) Offsets the influence of the IDFT processing of the M-point IDFT module 404 to some extent so that the transmitted signal has a single carrier property. 5 is a diagram illustrating a signal mapping method in a frequency domain to satisfy a single carrier characteristic in a frequency domain. In FIG. 5, (a) shows a localized mapping method and (b) shows a distributed mapping method. Currently, 3GPP LTE system defines a local mapping method.

Meanwhile, a clustered SC-FDMA which is a modified form of SC-FDMA will be described. Clustered SC-FDMA divides the DFT process output samples into sub-groups in the subcarrier mapping process sequentially between the DFT process and the IFFT process, separated from each other by subgroups at the IFFT sample input. Characterized in the subcarrier region, and may include a filtering process and a cyclic extension process in some cases.

In this case, the subgroup may be referred to as a cluster, and cyclic extension means a delay spread of a channel between successive symbols to prevent intersymbol interference (ISI) while each symbol of a subcarrier is transmitted through a multipath channel. This means inserting a longer guard interval.

FIG. 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 according to an embodiment of the present invention.

7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to a multi-carrier in a cluster SC-FDMA according to an embodiment of the present invention. 6 illustrates an example of applying a cluster SC-FDMA in an intra-carrier, and FIGS. 7 and 8 correspond to an example of applying a cluster SC-FDMA in an inter-carrier. In addition, FIG. 7 illustrates a case in which a signal is generated through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a case where contiguous component carriers are allocated in the frequency domain. FIG. 8 illustrates a case in which signals are generated through a plurality of IFFT blocks because component carriers are not adjacent in a situation in which component carriers are allocated non-contiguous in the frequency domain.

Segment SC-FDMA uses the same number of IFFTs as any number of DFTs, so the relationship between DFT and IFFT has a one-to-one relationship. Therefore, the segment SC-FDMA simply adopts DFT spreading and frequency subcarrier mapping of IFFT. It is sometimes referred to as NxSC-FDMA or NxDFT-s-OFDMA. In the present invention, the generic expression will be referred to as segmented SC-FDMA. 9 is a diagram illustrating a signal processing procedure in a segment SC-FDMA system according to an embodiment of the present invention. As shown in 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. It features.

On the other hand, the generation of a reference signal (hereinafter referred to as RS) sequence will be described.

는 기본 시퀀스의 순환 천이(cyclic shift)

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

Cyclic shift of the base sequence

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

는 RS 시퀀스의 길이를 나타내며,

는 주파수 영역 상에서 자원 블록의 크기를 나타내며, m은

을 만족한다. 이때,

는 최대 상향링크 전송 대역을 나타낸다.In Equation 1,

Represents the length of the RS sequence,

Represents the size of the resource block in the frequency domain, m is

To satisfy. At this time,

Denotes a maximum uplink transmission band.

는 몇 개의 그룹으로 구분되며, 이때,

는 그룹 번호를 나타내며,

는 해당 그룹 내에서 기본 시퀀스 번호에 해당한다. 각 그룹은 각 길이가

인 하나의 기본 시퀀스(

)와 각 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, where

Represents the group number,

Corresponds to the base sequence number within the group. Each group has its own length

One base sequence with

) And each length

Two basic sequences that are

). Sequence group number within that group

And its number

Can vary with time. Basic sequence

The definition of the sequence length

Follow.

또는 그 이상의 길이를 가진 기본 시퀀스는 다음과 같이 정의할 수 있다.

Or, basic sequences with lengths longer than 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.

The q th root Zadoff-Chu sequence may be defined by Equation 3 below.

In Equation 3 q is

The following Equation 4 is satisfied.

는 가장 큰 소수에 의해 주어지고 따라서,

를 만족한다.Length of the Zadoff-Chu sequence in Equation 4

Is given by the largest prime number

.

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

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

와

에 대해, 기본 시퀀스는 다음의 수학식 5와 같이 주어진다.

Wow

For, the basic sequence is given by Equation 5 below.

와

에 대한

의 값은 다음의 표 1과 표 2로 각각 주어진다.In Equation 5,

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.

In Equation 6, 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 초기화될 것이다.In Equation 7

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

Will 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. 이때,

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

Is

For PUSCH, a sequence shift pattern

Is

Is given by At this time,

Is organized by higher 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 is

Base sequence number within the base sequence group,

end

Is given by

인 기준 신호에 대해서, 슬롯

에서 기본 시퀀스 그룹 내에서 기본 시퀀스 번호

는 다음의 수학식 8과 같이 주어진다.Length is

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 각 무선 프레임의 시작에서

로 초기화될 것이다.In Equation 8,

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 generates at the start of each radio frame

Will be initialized to

The reference signal for the PUSCH is determined as follows.

는

로 정의된다. 이때, m과 n은

을 만족하고,

을 만족한다.Reference Signal Sequence for PUSCH

Is

Is defined as Where m and n are

Satisfying,

To satisfy.

와 함께

로 주어진다.In one slot, cyclic shift

with

Is given by

는 방송되는 값이고,

는 상향링크 스케줄링 할당에 의해 주어지며,

는 셀 특정 순환 시프트 값이다. 상기

는 슬롯 번호

에 따라 변하며,

와 같이 주어진다.At this time,

Is the value being broadcast,

Is given by the uplink scheduling assignment,

Is a cell specific cyclic shift value. remind

Is the slot number

Changes depending on

Is given by

는 슈도-랜덤 시퀀스이며,

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

로 초기화될 것이다.At this time,

Is a pseudo-random sequence,

Is a cell-specific value. Pseudo-Random Sequence Generator generates at the start of each radio frame

Will be initialized to

를 나타내는 표이다.Table 3 below shows the cyclic shift field in 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 블록의 동일한 세트로 사상될 것이다. 표준 순환 전치에 대해서는

으로, 확장 순환 전치에 대해서는

으로 서브프레임 내에서 자원 요소

에 사상하는 것은 먼저

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

Multiplied by

It will be mapped to the same set of physical resource blocks used for the corresponding PUSCH in the sequence beginning with. For the standard circular transpose

For extended circular transposition

Resource elements within subframes

To think first to

The order of increases and then the slot number.

이상이면, 순환 확장과 함께 ZC 시퀀스가 사용되고, 길이가

미만이면, 컴퓨터 생성 시퀀스가 사용된다.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, user equipment-specific cyclic shift, hopping pattern, and the like.

FIG. 10 is a diagram for describing a signal processing procedure for transmitting a reference signal (hereinafter, referred to as RS) in uplink. As shown in FIG. 10, data is transmitted in the IFFT after generating the signal in the time domain and converting it through the DFT precoder and performing frequency mapping, while RS omits the process through the DFT precoder. After being directly generated in the frequency domain (S11), the data is transmitted after the localization mapping (S12), the IFFT (S13) process, and the cyclic prefix (CP) attachment process (S14) are sequentially performed.

FIG. 11 illustrates a structure of a subframe for transmitting an RS in the case of a normal CP, and FIG. 12 illustrates a structure of a subframe for transmitting an RS in the case of an extended CP. It is a figure which shows a structure. In FIG. 11, RS is transmitted through 4th and 11th OFDM symbols, and in FIG. 12, RS is transmitted through 3rd and 9th OFDM symbols.

Meanwhile, the PUCCH includes the following format for transmitting control information.

(1) Format 1: Scheduling Request (SR) only with On-Off keying (OOK)

(2) Format 1a and Format 1b (Acknowledgment / Negative Acknowledgment only)

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

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

(3) Format 2 (CQI with QPSK only)

(4) Format 2a and Format 2b (CQI and ACK / NACK)

Table 4 below shows a PUCCH format, a modulation scheme, and the number of bits per subframe. Table 5 shows a PUCCH format and a number of reference signals for modulation per slot. Table 6 shows modulation for different PUCCH formats. Table shows the positions of the reference signals. In the following Table 4, PUCCH formats 2a and 2b correspond to a standard cyclic prefix.

The ACK / NACK signal has a different cyclic shift (frequency domain code) and Walsh / DFT orthogonal code (CG-CAZAC) with a computer-generated constant amplitude zero auto correlation (CG-CAZAC) base sequence for each user equipment. It is transmitted through different resources consisting of time-domain spreading codes. If the available cyclic shifts and Walsh / DFT codes are 6 and 3, respectively, a total of 18 user devices for a single antenna can be multiplexed within the same physical resource block (PRB).

FIG. 13 is a diagram illustrating a method of applying PUCCH formats 1a and 1b in the case of Normal Cyclic Prefix (Normal CP), and FIG. 14 is a diagram of PUCCH in case of Extended Cyclic Prefix (Extended CP) A diagram illustrating a method of applying formats 1a and 1b.

w0, w1, w2, w3 may be modulated in any time domain (after FFT modulation) or in any frequency domain (before FFT modulation).

15 illustrates a structure of a PUCCH at a subframe level.

In the second slot, the PUCCH channel may be transmitted to a frequency mirrored position of the first slot.

For SR and persistent scheduling, ACK / NACK resources allocated to a user device consisting of a cyclic shift, Walsh / DFT code, and a physical resource block (PRB) may be given through RRC (Radio Resource Control).

Resources allocated for dynamic ACK / NACK and non-persistent scheduling may be implicitly given by the lowest CCE index of the PDCCH corresponding to the PDSCH for ACK / NACK.

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

Orthogonal sequences for reference signals for the PUCCH format 1 / 1a / 1b are shown in Table 9 below.

인 경우에 해당한다.16 is a diagram illustrating ACK / NACK channelization for PUCCH formats 1a and 1b. In FIG. 16 above

Corresponds to

FIG. 17 illustrates channelization for a mixed structure of PUCCH formats 1 / 1a / 1b and formats 2 / 2a / 2b in the same PRB.

Cyclic Shift (CS) hopping and Orthogonal Covering (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 rethinking

1) for inter-cell interference randomization

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

Meanwhile, the resource nr for the PUCCH format 1 / 1a / 1b includes the following three combinations.

(1) CS (= same as DFT orthogonal code at symbol level)-> ncs

(2) OC (orthogonal covering at slot level)-> noc

(3) Frequency RB (Resource Block)-> nrb

That is, the representative index nr includes ncs, noc, and nrb. That is, nr = (ncs, noc, nrb) is satisfied.

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

은 (20, A) RM 코드를 이용하여 채널 코딩 블록에 삽입된다. 다음의 표 10은 (20, A) 코드를 위한 기본 시퀀스를 나타낸 표이다.For example, channel coding for UCI CQI in a 3GPP LTE system is described as follows. Bit stream

Is inserted into the channel coding block using the (20, A) RM code. Table 10 below shows a basic sequence for the (20, A) code.

의 채널 코딩 비트는 다음의 수학식 9에 의해 생성될 수 있다.

The channel coding bits of may be generated by Equation 9 below.

In Equation 9, i = 0, 1, 2,... Satisfies B-1.

Table 11 below shows a UCI field for uplink control information (UCI) for wideband reporting (single antenna port, transmit diversity or open loop spatial multiplexing PDSCH) CQI feedback.

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

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

와

는 MSB(Most Significant Bit)과 LSB(Least Significant Bit)에 각각 해당한다. 확장 CP의 경우에 CQI와 ACK/NACK이 동시에 전송되는 경우를 제외하면 최대 정보 비트는 11비트이다. RM 코드를 사용하여 20비트에 대해 인코딩한 후에 QPSK 변조가 적용될 수 있다.At this time,

Wow

Corresponds to a Most Significant Bit (MSB) and a Least Significant Bit (LSB), respectively. In the case of an extended CP, the maximum information bit is 11 bits except for the case where CQI and ACK / NACK are simultaneously transmitted. QPSK modulation can be applied after encoding for 20 bits using the RM code.

Bits encoded before QPSK modulation may be scrambled in a scrambling manner.

18 illustrates a slot level structure for PUCCH format 2 / 2a / 2b.

In the case of a standard CP, one subframe consists of 10 QPSK data symbols in addition to the RS symbol. That is, each QPSK symbol is spread by the CS using 20-bit encoded CQI bits at the SC-FDMA symbol level.

SC-FDMA symbol level CS hopping may be applied to randomize inter-cell interference. RS can be multiplexed by CDM using cyclic shift. For example, for 12/6 available CSs, 12/6 user equipments may each be multiplexed within the same PRB. In short, some user equipments in PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b may be multiplexed by CS + OC + PRB and CS + PRB, respectively.

19 illustrates PRB allocation.

As described above, illustrated in Figure 19, PRB may be used for the PUCCH transmission in slot n _s.

Meanwhile, a channel for transmitting ACK / NACK for a physical uplink shared channel (PUSCH) through downlink is called PHICH (Physical Hybrid-ARQ Indicator Channel) in the LTE system. 20 is a diagram illustrating a transmission process of a PHICH.

In the LTE system, since one PHICH does not use SU-MIMO in uplink, only one bit of ACK / NACK for a single data stream is transmitted (S200). The 1-bit ACK / NACK is coded into 3 bits using repetitive coding (S201) having a code rate of 1/3 and generates 3 modulation symbols using BPSK (S202). The modulated symbol is spread using a spreading factor (SF) using SF = 4 for a standard CP and SF = 2 for an extended CP (S203). The number of orthogonal sequences used for spreading is SF * 2 due to the I / Q multiplexing concept. Therefore, SF * 2 PHICHs spread using SF * 2 orthogonal sequences are defined as one PHICH group, and the PHICH groups present in any subframe are resource mapped after going through layer mapping (S204) and precoding. Is transmitted according to the method S205.

In the LTE system, the amount of PHICH resources of one subframe is determined as follows.

에 의해 식별되고,

는 PHICH 그룹 번호를 나타내고, 해당 그룹 내에서

는 직교 시퀀스 인덱스를 나타낸다.The PHICH transmits HARQ ACK / NACK. A plurality of PHICHs mapped to the same set of resource elements constitute a PHICH group, and PHICHs in the same PHICH group are separated through different orthogonal sequences. PHICH resource pairs

Identified by

Indicates the PHICH group number, and within that group

Represents an orthogonal sequence index.

는 모든 서브프레임 내에서 동일하고, 상기

는 다음의 수학식 10에 의해 구해진다.For frame structure type 1, the number of PHICH group numbers is

Is the same within all subframes, and

Is obtained by the following equation (10).

는 상위 계층에 의해 제공되고,

는 0부터

까지의 값을 가진다.In Equation 10,

Is provided by the higher layer,

From 0

Has a value up to.

값은 PBCH(Physical Broadcast Channel)을 통해 전송되며, 자세한 내용은 다음과 같다.

The value is transmitted through PBCH (Physical Broadcast Channel). Details are as follows.

As shown below, the PHICH configuration is divided into PHICH-duration and PHICH-resource.

Table 14 below shows the PHICH configuration.

에 대응하는 1/6, 1/2, 1, 2값을 나타내는 파라미터이다.In Table 14, the phich-Duration is a parameter for providing a duration for a Multi-Media Broadcast over a Single Frequency Network (MBSFN) and a Non-MBSFN (Non-MBSFN). In addition, phich-Resource is

Is a parameter representing a 1/6, 1/2, 1, or 2 value corresponding to.

The process of allocating PHICH resources is as follows.

와 같은 인덱스 쌍으로 알려지게 되는데, 이때

에서

는 PHICH 그룹 번호를,

는 해당 PHICH 그룹 안에서의 직교 시퀀스 인덱스를 의미한다.In the existing LTE system, a PHICH for PUSCH transmission is allocated using a cyclic shift of DMRS transmitted as a lowest PRB index of a PUSCH resource and an uplink grant as follows. PHICH resources

Known as an index pair,

in

The PHICH group number,

Denotes an orthogonal sequence index in the PHICH group.

Table 15 below shows an example of an orthogonal sequence used in an LTE system.

와

는 각각 다음의 수학식 11에 의해 구해진다.remind

Wow

Are each obtained by the following equation (11).

In addition, an example of an orthogonal sequence used in the current LTE system is shown in Table 12 below.

은 대응하는 PUSCH 전송에 관련된 전송 블록을 위한 가장 최근의 DCI 포맷에서 DMRS 필드를 위한 순환 천이로부터 사상된다. 랜덤 액세스 응답 승인신호와 관계된 PUSCH 전송 또는 서브프레임

내에서 DCI 포맷 0와 함께 대응하는 PDCCH가 부재하는 경우에 서브프레임 n에서 반지속적(semi persistent)으로 구성된 서브프레임 N에 대해서,

는 0으로 설정된다.In Equation 3

Is mapped from the cyclic shift for the DMRS field in the most recent DCI format for the transport block related to the corresponding PUSCH transmission. PUSCH transmission or subframe related to random access response acknowledgment

For subframe N configured as semi persistent in subframe n when there is no corresponding PDCCH with DCI format 0 within

Is set to zero.

는 PHICH 변조를 위해 사용되는 확산 계수 크기(spreading factor size)이다.

Is the spreading factor size used for PHICH modulation.

는 대응하는 PUSCH 전송의 첫 번째 슬롯의 가장 낮은 PRB 인덱스에 해당한다.

Corresponds to the lowest PRB index of the first slot of the corresponding PUSCH transmission.

는 상위 계층에 의해 구성되는 PHICH 그룹의 번호이다.

Is the number of the PHICH group constituted by the upper layer.

는 다음의 수학식 12를 만족한다.

Satisfies Equation 12 below.

Table 16 shows the relationship between the 3-bit field included in the DCI format and the actual cyclic shift.

와의 사상 관계를 나타낸 표이다.In addition, Table 17 below shows cyclic shifts for DMRS used to determine PHICH resources in DCI format 0.

This table shows the mapping relationship with.

A multi-carrier system or a carrier aggregation system is a group of one or more carriers having a band smaller than the target bandwidth when configuring a target broadband to support the broadband. Say your system. When one or more carriers having a band smaller than the target band are aggregated, the band of the aggregated carriers may be limited to the bandwidth used by the existing system for backward compatibility with the existing IMT system. For example, the existing 3GPP LTE system supports bandwidths of 1.4, 3, 5, 10, 15, and 20 MHz, and the LTE-Advanced (LTE-A) system, which is an improvement of the LTE system, supports only the bandwidths supported by LTE. By using to support a 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 interchangeably with carrier aggregation and bandwidth aggregation. In addition, the carrier set is a general term for both a contiguous carrier set and a non-contiguous spectrum aggregation.

When the system supports the carrier aggregation described above, it is a problem how to transmit an ACK / NACK signal in a situation where the number of uplink component carriers and the number of downlink component carriers are different from each other.

An object of the present invention is to provide a method and apparatus for transmitting a downlink ACK / NACK signal in a wireless communication system supporting multi-carriers.

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 a wireless mobile communication system supporting a carrier set according to an aspect of the present invention for solving the above problems, a method for transmitting a downlink ACK / NACK signal includes a plurality of uplink data including uplink data of a plurality of user equipment Receiving a link component carrier, and transmitting at least one downlink component carrier comprising an ACK / NACK signal for uplink data of the plurality of user equipments, wherein the at least one downlink On a component carrier, PHICH resources allocated for transmitting ACK / NACK signals for uplink data of the plurality of user equipments are the lowest among physical resource indexes allocated to user equipments included in each of the plurality of uplink component carriers. Determined by the value.

When the number of the plurality of uplink component carriers is greater than the number of the at least one downlink component carrier, and uplink data of at least one user device of the plurality of users is transmitted through the plurality of uplink component carriers The PHICH resource allocated for the ACK / NACK signal for the uplink data on the uplink carrier other than the carrier set as the reference carrier among the plurality of carriers may be determined by applying an offset value for the uplink carrier set as the reference carrier. Can be.

The allocated PHICH resource may be transmitted through the allocated PHICH resource by bundling the same ACK / NACK signals. In this case, bundling is a technique used for efficiently feeding back a plurality of ACK / NACK information. The bundling means processing and transmitting a plurality of ACK / NACK information using a logical AND operation or a logical OR operation. For example, bundling using a logical AND operation means transmitting a NACK signal when any one of the plurality of ACK / NACKs is present, and transmitting an ACK only when the response of all signals is ACK as a result of decoding. In addition, bundling using a logical OR operation means transmitting an ACK signal when even one ACK among a plurality of ACK / NACKs exists, and transmitting a NACK only when a response of all signals is NACK as a result of decoding.

The method may further include transmitting bitmap information designating an uplink component carrier to which the bundling can be applied among the plurality of uplink component carriers.

The method may further include transmitting bundling window size information specifying the number of uplink component carriers to which the bundling can be applied among the plurality of uplink component carriers.

In a wireless mobile communication system supporting a carrier set according to another aspect of the present invention, a method for receiving a downlink ACK / NACK signal comprises the steps of transmitting uplink data of a user equipment through a plurality of uplink carriers and the uplink Receiving at least one downlink component carrier comprising an ACK / NACK signal for link data, allocating for transmitting an ACK / NACK signal for the uplink data on the at least one downlink component carrier The PHICH resource is determined by a lowest value among physical resource indexes allocated to the user equipment included in each of the plurality of uplink carriers.

When the number of the plurality of uplink component carriers is greater than the number of the at least one downlink component carrier, the ACK / NACK signal for the uplink data on the uplink carrier other than the carrier set as the reference carrier of the plurality of carriers The PHICH resource allocated for may be determined by applying an offset value for an uplink carrier set as the reference carrier.

The allocated PHICH resource may be received through the allocated PHICH resource by bundling the same ACK / NACK signals.

The method may further include receiving bitmap information designating an uplink component carrier to which the bundling is applicable among the plurality of uplink component carriers.

The method may further include receiving bundling window size information that specifies the number of uplink component carriers to which the bundling can be applied among the plurality of uplink component carriers.

According to the present invention, in a system supporting a carrier aggregation, even when the number of carrier aggregation uplink component carriers and downlink component carriers are different from each other, the ACK / NACK signal can be efficiently transmitted. 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.
FIG. 1 is a diagram for describing physical channels used in an 3GPP LTE system, which is an example of a mobile communication system, and a general signal transmission method using the same.
2 is a diagram for describing a signal processing procedure for transmitting an uplink signal by a user equipment.
3 is a diagram for describing a signal processing procedure for transmitting a downlink signal by a base station.
4 is a diagram for describing an SC-FDMA scheme for uplink signal transmission and an OFDMA scheme for downlink signal transmission in a mobile communication system.
5 is a diagram illustrating a signal mapping method in a frequency domain to satisfy a single carrier characteristic in a frequency domain.
FIG. 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 according to an embodiment of the present invention.
7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to a multi-carrier in a cluster SC-FDMA according to an embodiment of the present invention.
9 is a diagram illustrating a signal processing procedure in a segment SC-FDMA system according to an embodiment of the present invention.
FIG. 10 is a diagram for describing a signal processing procedure for transmitting a reference signal (hereinafter, referred to as RS) in uplink.
FIG. 11 illustrates a structure of a subframe for transmitting an RS in the case of a normal CP, and FIG. 12 illustrates a structure of a subframe for transmitting an RS in the case of an extended CP. It is a figure which shows a structure.
FIG. 13 shows PUCCH formats 1a and 1b in the case of standard cyclic prefix, and FIG. 14 shows PUCCH formats 1a and 1b in the case of extended cyclic prefix.
15 illustrates a structure of a PUCCH at a subframe level.
16 is a diagram illustrating ACK / NACK channelization for PUCCH formats 1a and 1b.
FIG. 17 illustrates channelization for a mixed structure of PUCCH formats 1 / 1a / 1b and formats 2 / 2a / 2b in the same PRB.
18 is a diagram illustrating a slot level structure for PUCCH format 2 / 2a / 2b.
19 illustrates PRB allocation.
20 is a diagram illustrating a transmission process of a PHICH.
21 is a diagram illustrating a concept of managing downlink component carriers in a base station.
22 is a diagram illustrating a concept of managing uplink component carriers in a terminal.
FIG. 23 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.
FIG. 24 is a diagram illustrating a concept in which one or more MACs manage a multicarrier from a transmission point of a base station.
25 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.
FIG. 26 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.
FIG. 27 is a view for explaining a concept in which one or more MACs manages multicarriers from a transmission point of a base station.
FIG. 28 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.
FIG. 29 illustrates a case where a ratio of the number of downlink component carriers to uplink component carriers is 1: 2.
30 is an ACK / NACK bundling mode for solving a PHICH resource collision problem in an asymmetric carrier set in which the number of downlink component carriers and the number of uplink component carriers are 1: 2 according to an embodiment of the present invention It is a figure explaining the method of applying.
FIG. 31 illustrates an asymmetric carrier set in which the ratio of the number of downlink component carriers and the number of uplink component carriers is 2: 1.
32 is a diagram illustrating a symmetric carrier set in which the ratio of the number of downlink component carriers and the number of uplink component carriers is 2: 2.
33 is a block diagram showing a configuration of a device applicable to a base station and a user equipment and capable of carrying out the present invention.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the Institute of Electrical and Electronics Engineers (IEEE) 802.11m, 3GPP system, 3GPP LTE system, and 3GPP2 system, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.

In addition, specific terms used in the following description are provided to help the understanding of the present invention, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present invention.

In the figure of the present invention, DL CC # n represents downlink component carrier #n, and UL CC # m represents uplink component carrier #n.

In order to use multicarrier efficiently, a description will be given of a technique in which a single upper layer (for example, a series of layers consisting of a MAC layer, an RRC layer, and a PDCP layer) manages PHY layers controlling each of multiple carriers. do.

FIG. 21 is a diagram illustrating a concept of managing downlink component carriers in a base station, and FIG. 22 is a diagram illustrating a concept of managing uplink component carriers in a terminal. For convenience of explanation, hereinafter, the upper layer will be briefly described as MAC in FIGS. 21 and 22.

FIG. 23 is a diagram for explaining a concept in which one MAC manages multicarriers from a transmission point of a base station. 24 is a view illustrating a concept in which one MAC manages a multicarrier from a reception point of a terminal. In this case, in order to effectively transmit and receive multicarriers, both the transmitter and the receiver should be able to transmit and receive multicarriers.

In simple terms, one MAC manages and operates one or more frequency carriers to transmit and receive. In addition, since frequency carriers managed in one MAC do not need to be contiguous with each other, there is an advantage of being more flexible in terms of resource management. In FIG. 23 and 24, one PHY means one component carrier for convenience. 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.

FIG. 25 is a diagram illustrating a concept in which one or more MACs manage a multicarrier from a transmission point of a base station. FIG. 26 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal. FIG. 27 is a view for explaining a concept in which one or more MACs manages multicarriers from a transmission point of a base station.

FIG. 28 is a view illustrating a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.

In addition to the structures illustrated in FIGS. 23 and 24, one or more MACs may be controlled by one or more MACs instead of one MAC as illustrated in FIGS. 25 and 28.

As shown in FIG. 25 and FIG. 26, each carrier may control 1: 1 by each MAC. As shown in FIGS. 27 and 28, each carrier may be controlled by each MAC by 1: 1 for some carriers. One MAC may control the remaining one or more carriers.

The above system is a system comprising a plurality of carriers from 1 to N, and each carrier can be used adjacent or non-contiguous. This may be applied to the uplink and the downlink without distinction. In the case of TDD system, it is configured to operate N multiple carriers while including downlink and uplink transmission in each carrier, and in case of FDD system, multiple carriers can be used for uplink and downlink, respectively. .

In existing systems, bandwidths of uplink and downlink may be configured differently, but basically, transmission and reception in a single carrier are supported. However, the system of the present invention can operate a plurality of carriers through the carrier set as described above. In addition, the FDD system may also support asymmetric carrier aggregation in which the number of carriers and / or the bandwidth of the carriers are aggregated in uplink and downlink.

A carrier set in which two or more component carriers are aggregated may be considered to support a wider transmission band, for example 100 MHz and spectrum aggregation.

The terminal may receive or transmit one or a plurality of component carriers at the same time, depending on the capability.

A terminal having reception and / or transmission capability for a carrier aggregation may simultaneously perform reception and / or transmission on multiple component carriers. The existing terminal may receive or transmit through a single component carrier.

When the aggregated number of component carriers of the uplink and the downlink is the same, it is possible to configure all the component carriers of the existing system. However, component carriers that do not consider compatibility are not excluded from the present invention.

It is possible to configure the user equipment to aggregate different number of component carriers of different bands in uplink and downlink. In a typical TDD, the number of component carriers and the band of each component carrier will be the same in uplink and downlink.

Regarding the Media Access Control-Physical (MAC-PHY) interface, there is one Hybrid Automatic Repeat reQuest (HARQ) entity for each scheduled component carrier when there is no spatial multiplexing from the user equipment point of view. Can be. Each transport block is mapped to only one component carrier. The user equipment can be scheduled for multiple component carriers at the same time.

For a set of symmetric carriers (when the number of aggregated uplink component carriers and the number of downlink component carriers are the same), PHICH resource indexing assumes that all component carriers remain compatible with the existing system. This can be simplified by extending the principles of existing systems (eg, LTE Rel-8), such as NACK bundling, channel selection techniques, and ACK / NACK multiplexing using multiple sequence modulation. In this case, the PHICH resource indexing means allocating a PHICH resource index for transmitting ACK / NACK.

Hereinafter, for convenience of description, when the PDCCH is transmitted on the downlink component carrier # 0, it is assumed that the corresponding PDSCH is transmitted on the downlink component carrier # 0. However, cross-carrier scheduling is applied. It is apparent that the corresponding PDSCH can be transmitted through other downlink component carriers.

In the present invention, asymmetric carrier aggregation (when the number of uplink component carriers and the number of downlink component carriers are different) is possible. For example, the ratio of the number of downlink component carriers to the number of uplink component carriers is one to many. FIG. 29 illustrates a case where a ratio of the number of downlink component carriers to uplink component carriers is 1: 2.

The connection between the downlink component carrier and the uplink component carrier may be cell-specific or user equipment-specific. The present invention is not limited to the case of FIG. 29 and may be applied to other asymmetric carrier sets.

Since the PHICH resource, which consists of a PHICH group and a sequence index, is determined according to the first PRB index of a transmitted PUSCH, when the first PRB indexes are shared by two PUSCHs (for example, a PUSCH or a single user equipment) PUSCHs from a plurality of user equipments) and PHICH may collide with each other. In this case, the parameter of n_DMRS transmitted in DCI (Data Control Information) can solve the collision problem. The n_DMRS represents a cyclic shift value.

However, such an approach may, in view of the system, cause scheduling limitations associated with performance loss. For example, when the first index of n_PRB # m in uplink component carrier # 0 is occupied for uplink transmission, n_PRB # m + n_DMRS cannot be used to avoid the PHICH collision problem.

In order to solve this problem, when the last PHICH for two downlink ACK / NACK for each uplink component carrier represents the same PHICH resources including the PHICH group / sequence and the cyclic shift value (n_DMRS), each Two downlink ACK / NACKs for the uplink component carrier may be bundled and transmitted. That is, in an asymmetric carrier set, when a plurality of PHICH resources collide with each other, the corresponding ACK / NACK may be transmitted through the same PHICH resource by a bundling mode.

30 is an ACK / NACK bundling mode for solving a PHICH resource collision problem in an asymmetric carrier set in which the number of downlink component carriers and the number of uplink component carriers are 1: 2 according to an embodiment of the present invention It is a figure explaining the method of applying. In this case, the bundling mode means that a representative ACK / NACK is transmitted for a plurality of ACK / NACK. For example, in the case of two ACK / NACK for two component carriers, a representative ACK / NACK may be transmitted. If both ACK / NACKs for two component carriers are ACKs, the representative ACK / NACK may be ACK. When at least one of the ACK / NACKs for the two component carriers is NACK, the representative ACK / NACK may be NACK.

Although the example was a rather dynamic approach, the bundling mode may be set by a semi-persistent manner, for example, by broadcasting signaling or by cell-specific or user device specific Radio Resource Control (RRC) signaling. Can be.

According to the method described above, the PHICH collision problem can be effectively solved by the bundling method. In addition, according to the above method, there is no DTX (Discontinuous Transmission) in PHICH transmission.

As another method for resolving PHICH resource conflicts, in assigning PUSCH resources, a method of limiting the scheduler's behavior may be considered. For example, in the case of a PHICH collision caused by sharing the same PHICH resources for a plurality of component carriers, it is possible to limit the scheduler's behavior so that the first PRB index among uplink component carriers is not allocated. That is, when the ratio of the number of downlink component carriers and uplink component carriers is 1: 2, the scheduler includes the last PHICH resource including a PRB index and a cyclic shift value for uplink component carrier # 0 and uplink component carrier # 1. Resource allocation can be controlled so that these are different from each other.

As a more detailed example, the scheduler may include an offset α for resource allocation for each component carrier such that the difference in the first PRB index between the two uplink component carriers has an offset α.

The offset α may provide a degree of freedom for distinguishing PHICH resources. When α is 1, the first PRB index for uplink component carrier # 0 may be n_PRB # m, and the first PRB index for uplink component carrier # 1 may be n_PRB # m + 1. . The α value may be predetermined or signaled by broadcasting signaling or cell specific or user device specific RRC signaling.

As another network operation, hereinafter, the scheduler allocates the same first PRB index for two downlink component carriers. In this case, it is assumed that the cyclic shift value in DCI is 0 or the last PHICH index is the same for each component carrier. In addition, the PHICH resource index may include or exclude the component carrier index. The following procedure may be performed. In this case, it is assumed that one PUSCH transport block is transmitted through each component carrier.

(1) The base station scheduler allocates a PRB index for the PUSCH on each component carrier by one of the following procedures.

A. The base station scheduler allocates the same first PRB index for the PUSCH on each component carrier.

B. The base station scheduler has a scheduling constraint that the same first PRB index cannot be scheduled at the same time for each component carrier. In this case, the rest of the procedure can be omitted.

(2) The user equipment transmits a plurality of PUSCH transport blocks on each component carrier according to the scheduling.

(3) The base station transmits ACK / NACK through the PHICH by one of the following procedures.

A. The base station always transmits a NACK.

B. A base station always transmits nothing. This causes missed ACK / NACK on the user equipment side.

C. The base station transmits ACK / NACK using ACK / NACK bundling.

(4) The user equipment can expect the following.

A. The user equipment knows nothing about the ACK / NACK procedure determined by the base station. The user equipment follows the normal ACK / NACK procedure (OA of (3) or B of (3)).

B. The corresponding downlink ACK / NACK is transmitted from the base station in a bundling manner for a plurality of PUSCHs (C in (3) above).

Alternatively, when the base station allocates the same first PRB index for each component carrier, the relationship for the PHICH resource may be redefined as follows.

The PHICH resource for each component carrier may have an offset value Δ. In this case, the offset value Δ may be applied in a cyclic manner. For example, if the last resource index has a negative value, the last resource index may be determined by applying a modular operation.

When Δ is 1, when the allocated PUSCH resource includes two or more PRBs, the PHICH resource corresponding to the second PRB index may be freely used.

When Δ is -1, when the n_PRB-1 index is not used for PRB allocation, other PHICH resources corresponding to the PRB with n_PRB-1 can be freely used.

In the present embodiment, the PUCCH resource allocation in the carrier set will be described.

The procedure of PUCCH bundling for uplink ACK / NACK may have the same rules as the PHICH resource allocation procedure or the transmission rule, such as PHICH bundling described above. In transmission of uplink ACK / NACK, two of the following cases are possible. FIG. 31 illustrates an asymmetric carrier set in which the ratio of the number of downlink component carriers and the number of uplink component carriers is 2: 1. FIG. 32 is a diagram illustrating a symmetric carrier set in which the number of downlink component carriers and the number of uplink component carriers are 2: 2. In FIG. 31, the uplink ACK / NACK may be transmitted through the uplink component carrier # 0. In FIG. 32, according to the user equipment specific or cell specific downlink and uplink connection, the uplink ACK / NACK It may be transmitted on only uplink component carrier # 0, only on uplink component carrier # 1, or both.

In the present embodiment, all user devices will be described with reference to FIGS. 31 and 32.

In FIG. 32, a plurality of ACK / NACK may be transmitted by a plurality of sequence transmissions that break a single carrier characteristic. In the case where the power of the user equipment is limited, it is desirable to maintain a single carrier characteristic in terms of coverage. Therefore, the case of power limitation will be concentrated on the user device # 2. However, it is not limited in this case.

In principle, the PUCCH resource for downlink traffic is determined by the lowest Control Channel Element (CCE) index of the PDCCH corresponding to the data portion.

Assuming that two PDCCHs and corresponding PDSCHs are transmitted in each component carrier, the PUCCH resource index may be determined by the lowest CCE index for each PDCCH. Then, two uplink ACK / NACK may be transmitted by each PUCCH resource index.

If two lowest CCE indexes or the last PUCCH resources that may include or exclude the component carrier index are the same, the corresponding ACK / NACK may be transmitted by one of the following procedures.

(1) ACK / NACK is transmitted by bundling operation. The bundled ACK / NACK may be transmitted on PUCCH or PUSCH.

(2) The user equipment always transmits a DTX indicating that there has been no transmission of the PUCCH and the PUSCH.

(3) The user equipment always transmits a NACK.

Alternatively, when the base station allocates the same lowest CCE index for each component carrier, the relationship to PUCCH resources may be redefined as follows.

The PUCCH resource for each component carrier may include an offset value Δ. In this case, the offset value Δ may be applied in a cyclic manner. For example, if the last resource index has a negative value, the last resource index may be determined by modulo operation.

If Δ is 1, when the allocated PUCCH includes two or more PRBs, other PUCCH resources corresponding to the second CCE index may be freely used.

If Δ is -1, if the n_CCE-1 index is not used for PRB allocation, the PUCCH resource corresponding to the CCE index with n_CCE-1 may be freely used.

The method described above may be performed in the following devices. 33 is a block diagram showing a configuration of a device applicable to a base station and a user equipment and capable of carrying out the present invention. As shown in FIG. 33, the device 100 includes a processing unit 101, a memory unit 102, a radio frequency (RF) unit 103, a display unit 104, and a user interface unit 105. do. The layer of physical interface protocol is performed in the processing unit 101. The processing unit 101 provides a control plane and a user plane. The function of each layer may be performed in the processing unit 101. The processing unit 101 may perform the embodiments of the present invention described above. Specifically, the processing unit 101 may perform a function of generating a user equipment location determination subframe or receiving the subframe to determine the location of the user device. The memory unit 102 is electrically connected to the processing unit 101 and stores an operating system, an application, and a general file. If the device 100 is a user device, the display unit 104 may display a variety of information, and may be implemented by using a known liquid crystal display (LCD), an organic light emitting diode (OLED), or the like. The user interface unit 105 can be configured in combination with known user interfaces such as keypads, touch screens, and the like. The RF unit 103 is electrically connected to the processing unit 101 and transmits or receives a radio signal.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be implemented 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. 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 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 the present invention, a user equipment (UE) may be replaced with terms such as a mobile station (MS), a subscriber station (SS), a mobile subscriber station (MSS), or a mobile terminal.

Meanwhile, the UE of the present invention includes a PDA (Personal Digital Assistant), a cellular phone, a Personal Communication Service (PCS) phone, a Global System for Mobile (GSM) phone, a Wideband CDMA (WCDMA) phone, a Mobile Broadband System (MBS) phone, and the like. Can be used.

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

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

In the case of an implementation by firmware or software, the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs 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.

The invention can be embodied in other specific forms without departing from the spirit and essential features 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. In addition, claims that do not have an explicit citation in the claims may be combined to form an embodiment or included in a new claim by amendment after the application.

The present invention can be used in a terminal, base station, or other equipment of a wireless mobile communication system.

Claims (6)

In a wireless mobile communication system supporting a carrier set, a method of transmitting an ACK / NACK signal when the number of downlink component carriers and the number of uplink component carriers are different,
Receiving a plurality of uplink component carriers;
Transmitting at least one downlink component carrier comprising an acknowledgment / negative acknowledgment (ACK / NACK) signal for the plurality of uplink component carriers;
When the physical hybrid-ARQ indicator channel (PHICH) resource region on the at least one downlink component carrier for transmitting the ACK / NACK signal for the plurality of uplink component carriers are the same, the ACK / NACK signal is bundled (bundled) and sent,
ACK / NACK signal transmission method. The method of claim 1, wherein the physical hybrid-ARQ indicator channel (PHICH) resource region on the at least one downlink component carrier for transmitting ACK / NACK signals for the plurality of uplink component carriers is the same. When all of the plurality of uplink component carriers are successful, an ACK signal is transmitted, and when at least one of the plurality of uplink component carriers fails, a NACK signal is transmitted.
ACK / NACK signal transmission method. The method of claim 1,
The plurality of uplink component carriers is two, and the at least one downlink component carrier is one;
ACK / NACK signal transmission method. In a wireless mobile communication system supporting a carrier set, a method of transmitting an ACK / NACK signal when the number of downlink component carriers and the number of uplink component carriers are different,
Transmitting a plurality of downlink component carriers;
Receiving at least one uplink component carrier comprising an Acknowledgment / Negative Acknowledgment (ACK / NACK) signal for the plurality of downlink component carriers,
When the PUCCH resources on the at least one uplink component carrier for transmitting the ACK / NACK signals for the plurality of downlink component carriers are the same, the ACK / NACK signal is bundled and transmitted,
ACK / NACK signal transmission method. The method of claim 4, wherein
When the PUCCH resource regions on the at least one uplink component carrier for transmitting the ACK / NACK signal for the plurality of downlink component carriers are the same, when the reception of the plurality of downlink component carriers are all successful, When an ACK signal is transmitted and reception of at least one of the plurality of downlink component carriers fails, a NACK signal is transmitted.
ACK / NACK signal transmission method. The method of claim 4, wherein
The plurality of downlink component carriers is two, and the at least one uplink component carrier is one;
ACK / NACK signal transmission method.

Images