KR101584751B1 - Method for uplink control channel resource configuration, transmission/reception point thereof, method for mapping uplink control channel resource and terminal thereof - Google Patents

Abstract

The present invention relates to an uplink control channel resource setting method, an uplink control channel resource mapping method and an apparatus therefor for a terminal receiving downlink control information through a downlink control channel introduced in a data area, The present invention relates to an uplink control channel resource setting and mapping method for uplink HARQ ACK / NACK feedback for a downlink data channel through downlink scheduling information transmitted through a channel, and an apparatus therefor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for establishing uplink control channel resources of a transmission / reception point, a transmission / reception point, a method of mapping uplink control channel resources, TERMINAL THEREOF}

The present invention relates to an uplink control channel resource setting method, an uplink control channel resource mapping method and an apparatus therefor for a terminal receiving downlink control information through a downlink control channel introduced in a data area, The present invention relates to an uplink control channel resource setting and mapping method for uplink HARQ ACK / NACK feedback for a downlink data channel through downlink scheduling information transmitted through a channel, and an apparatus therefor.

In a wireless communication system capable of transmitting data to a larger number of users, the system capacity increase is limited due to the resources of the conventional limited control region. Therefore, it is necessary to transmit downlink control information through the downlink control channel located in the data region.

Meanwhile, in the wireless communication system, uplink HARQ ACK / NACK feedback of a UE receiving downlink scheduling information through a new downlink control channel introduced in a data area for improving performance and capacity of a downlink control channel It is necessary to define the uplink control channel resource setting and mapping method.

The present invention proposes an uplink control channel resource setting and mapping method for uplink HARQ ACK / NACK feedback for a UE set to receive DCI (Downlink Control Information) through an Enhanced Physical Downlink Control Channel (EPDCCH).

A method for setting an uplink control channel resource of a transmission / reception point for transmitting control information for a terminal through a data area of a resource block pair of a subframe, And allocating at least one set of at least one downlink control channel, which is a natural number equal to or less than 1 and a natural number equal to or less than the number of PRBs in all bands, And transmitting the channel resource starting offset indication information to the UE.

For each set of at least one enhanced physical downlink control channel configured with X resource block pairs (X is a natural number equal to or greater than 1 and equal to or less than the number of PRBs in all bands) of the subframe, Receiving resource starting offset indication information from a transmission / reception point; Receiving downlink scheduling control information from at least one transmission / reception point through at least one enhanced control channel element (ECCE) of one of the at least one downlink control channel set, The uplink control channel resource starting offset indication information, the minimum index of the control channel element, and the downlink scheduling offset information when mapping ACK / NACK uplink control channel resources for a Physical Downlink Shared Channel (PDSCH) allocated according to scheduling control information. Mapping at least one of a transmission antenna port of the control information and dynamic offset information transmitted through the downlink scheduling control information as a resource decision element to the uplink control channel resource mapping method of the terminal.

The present invention provides a transmission / reception point for transmitting control information for a terminal through a data area of a resource block pair of a subframe, wherein X pairs of resource blocks of the subframe (X is 1 or more and PRB A control unit for allocating uplink control channel resource starting offset indication information for each of the at least one downlink control channel set, and a control unit for allocating uplink control channel resource starting offset indication information for each of the at least one downlink control channel set, And a transmission unit for transmitting the transmission / reception point to the terminal.

For each set of at least one enhanced physical downlink control channel configured with X resource block pairs (X is a natural number equal to or greater than 1 and equal to or less than the number of PRBs in all bands) of the subframe, Receiving a resource starting offset indication from a transmission and reception point and transmitting the downlink scheduling control message through at least one enhanced control channel element (ECCE) of one of the at least one downlink control channel set Information from the transmission / reception point and an uplink control channel resource starting offset indication information when mapping ACK / NACK uplink control channel resources for PDSCH (Physical Downlink Shared Channel) allocated according to the downlink scheduling control information A minimum index of the control channel element, a minimum index of the downlink scheduling control information A transmission antenna port, and dynamic offset information transmitted through the downlink scheduling control information as a resource decision element.

1 shows an example of a wireless communication system to which embodiments are applied.
2 and 3 are flowcharts of downlink transmission and uplink transmission in the wireless communication system of FIG.
FIG. 4 illustrates how control information according to each Physical Uplink Control Channel (PUCCH) format is mapped to a resource block (RB).
FIG. 5 shows one resource block pair of a DL subframe in the case of a normal cyclic prefix (CP) in a LTE (Long Term Evolution) or LTE-Advanced (LTE-Advanced) system.
Figure 6 shows two types of EPDCCH transmission: centralized EPDCCH transmission and distributed EPDCCH transmission.
FIG. 7 shows two EPDCCH transmission types, a localized EPDCCH transmission and a distributed EPDCCH transmission.
8 is a flow chart of a method by which a transmitting and receiving point sets up a PUCCH resource using explicit decision parameter information.
FIG. 9 is a flowchart of a method in which a terminal maps PUCCH resources using explicit decision parameter information.
10 is a flowchart illustrating a process of downlink transmission of a transmission / reception point and uplink transmission of a UE according to an embodiment of the present invention.
11 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.
12 is a diagram illustrating a configuration of a user terminal according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data and the like. A wireless communication system includes a user equipment (UE) and a transmission / reception point. The user terminal in this specification is a comprehensive concept of a terminal in wireless communication. It is a comprehensive concept which means a mobile station (MS), a user terminal (UT), an SS (User Equipment) (Subscriber Station), a wireless device, and the like.

A base station (BS) or a cell, a Node-B, an evolved Node-B (eNB), a sector (Sector) ), A site, a base transceiver system (BTS), an access point, a relay node, a remote radio head (RRH), and a radio unit (RU).

That is, the base station or the cell in this specification is interpreted as a comprehensive meaning indicating a partial region or function covered by BSC (Base Station Controller) in CDMA, NodeB in WCDMA, eNB in LTE or sector (site) And covers various coverage areas such as a megacell, a macro cell, a microcell, a picocell, a femtocell and a relay node, a remote radio head (RRH), and a communication range of an RU (radio unit).

In this specification, a user terminal and a transmission / reception point are used in a generic sense as two transmitting and receiving subjects used to implement the technical or technical idea described in the present specification, and are not limited by a specific term or word. The user terminal and the transmission / reception point are used in a broad sense as two (uplink or downlink) transmission / reception subjects used to implement the technical or technical idea described in the present invention, and are not limited by a specific term or word. Here, an uplink (UL, or uplink) means a method of transmitting / receiving data to / from a base station by a user terminal, and a downlink (DL or downlink) .

There are no restrictions on multiple access schemes applied to wireless communication systems. Various multiple access schemes such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, Can be used. An embodiment of the present invention can be applied to asynchronous wireless communication that evolves into LTE and LTE-advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. The present invention should not be construed as limited to or limited to a specific wireless communication field and should be construed as including all technical fields to which the idea of the present invention can be applied.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

In systems such as LTE and LTE-A, the uplink and downlink are configured on the basis of one carrier or carrier pair to form a standard. The uplink and downlink transmit control information through a control channel such as a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), and a Physical Uplink Control CHannel And a data channel such as a Physical Downlink Shared CHannel (PDSCH), a Physical Uplink Shared CHannel (PUSCH), and the like.

In this specification, a cell refers to a component carrier having a coverage of a signal transmitted from a transmission point or a transmission point or transmission / reception point of a signal transmitted from a transmission / reception point, and a transmission / reception point itself . 1 shows an example of a wireless communication system to which embodiments are applied.

Referring to FIG. 1, a wireless communication system 100 to which embodiments are applied includes a coordinated multi-point transmission / reception system (CoMP system) in which two or more transmission / reception points cooperatively transmit signals, A coordinated multi-antenna transmission system, and a cooperative multi-cell communication system. CoMP system 100 may include at least two transmit and receive points 110 and 112 and terminals 120 and 122.

The transmission / reception point has a high transmission power, which is connected to a base station or a macro cell (hereinafter referred to as 'eNB') 110 and an eNB 110 through an optical cable or an optical fiber, Or at least one RRH 112 with the same number of RRs. The eNB 110 and the RRH 112 may have the same cell ID or different cell IDs.

Hereinafter, a downlink refers to a communication or communication path from the transmission / reception point 110 or 112 to the terminal 120, and an uplink refers to communication from the terminal 120 to the transmission / reception point 110 or 112 Or a communication path. In the downlink, the transmitter may be part of the transmission / reception point 110, 112, and the receiver may be part of the terminal 120, 122. In the uplink, the transmitter may be part of the terminal 120, and the receiver may be part of the transmission / reception point 110, 112.

Hereinafter, a situation in which a signal is transmitted and received through a channel such as a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH), a Physical Downlink Control Channel (PDCCH), and a Physical Downlink Shared Channel (PDSCH) is referred to as a PUCCH, PDSCH is transmitted and received.

2 and 3 are flowcharts of downlink transmission and uplink transmission in the wireless communication system of FIG.

Referring to FIGS. 2 and 3, the eNB 110, which is one of the transmission / reception points 110 and 112, can perform downlink transmission (S210 and S310) to the UEs 120 and 122. The eNB 110 includes a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and downlink control information, such as scheduling, required for reception of a PDSCH, (Physical Downlink Control Channel (PDCCH)) for transmitting scheduling grant information for transmission in a physical uplink shared channel (PUSCH), for example. Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

Referring to FIG. 2, the first terminal 120 (UE1) can perform uplink transmission (S220) to the eNB 110 as a first transmission / reception point. Referring to FIG. 3, the second terminal 122 (UE2) can perform uplink transmission (S320) to the RRH 112, which is the second transmission / reception point, which is one of the transmission / reception points 110 and 112. The first terminal 120 may perform the uplink transmission to the RRH 112 and the second terminal 122 may perform the uplink transmission to the eNB 110 according to the radio environment. The number of terminals may be two or more. In the following example, the number of UEs is two, one UE transmits an uplink signal to an eNB 110, and the other UE transmits an uplink signal to the RRH 112. [

2 and 3, the first terminal 120 and the second terminal 122 are connected to the first transmission / reception point 110 and the second transmission / reception point 112, respectively, through an uplink control channel (for example, A scheduling request (SR), a Hybrid ARQ (HARQ) -ACK for a received downlink data channel transmission block, and a report of a UE related to a downlink channel state can be transmitted through a Physical Uplink Control Channel (PUCCH) , And uplink data channel (for example, PUSCH (Physical Uplink Shared CHannel)). The first terminal 120 and the second terminal 122 are connected to the first transmission / reception point 110 and the second transmission / reception point 112 by a reference signal (for example, DM-RS (DeModulation Reference Signal)).

Hereinafter, the first terminal 120 and the second terminal 122 are unified into the terminal 120, and the first transmission / reception point 110 and the second transmission / reception point 112 are unified into the transmission / reception point 110 in the present specification.

At this time, the PUCCH can support various formats as shown in Table 1 below.

The PUCCH format 1 / 1a / 1b may be used for SR (scheduling request) and HARQ-ACK transmission. The PUCCH format 2 / 2a / 2b may be used for CQI (Channel Quality Indicator) / PMI (Precoding Matrix Indicator) / RI (Rank Indication) transmission. The PUCCH format 3 can be used for a plurality of HARQ-ACK / NACK transmissions.

을 사용한다.

은 심볼 넘버(l)과 슬롯 넘버(n_s)에 따라 다음의 수학식 1과 같이 정의될 수 있다.All PUCCH formats have a cell-specific cyclic shift (CS)

Lt; / RTI >

Can be defined as the following Equation 1 according to the symbol number l and the slot number n _s .

은 상향링크에서 한 슬롯 당 사용되는 전체 SC-FDMA(Single Carrier Frequency Division Multiple Access) 심볼의 개수에 해당한다. c(i)는 의사-랜덤(pseudo-random) 시퀀스로서, 초기값(c_init)은 셀 아이디(

)이다. 따라서, PUCCH의 순환 지연은 셀 아이디에 의해 결정될 수 있다.In Equation (1)

Corresponds to the total number of SC-FDMA symbols used per slot in the uplink. c (i) is a pseudo-random sequence, and the initial value c _init is a cell ID

)to be. Therefore, the cyclic delay of the PUCCH can be determined by the cell ID.

FIG. 4 shows how control information according to each PUCCH format is mapped to a resource block (RB).

The physical resource block used for transmission of the PUCCH as shown in FIG. 4 can be defined as the following Equation 2 in the slot n _s .

The variable in equation (2) depends on the PUCCH format.

은

이고, In the case of Formats 1 and 1a, 1b

silver

ego,

은

이고, 포맷 3인 경우에

은

이다.In the case of formats 2, 2a and 2b

silver

, And in the format 3

silver

to be.

는 상향링크 자원 블록의 개수이며, In Equation (2), n _PRB is a physical resource block number,

Is the number of uplink resource blocks,

는 하나의 자원 블록에서 서브캐리어의 개수이다.

는 상위계층 시그널링을 통해 전달되는 값으로서,

는 각 슬롯에서 PUCCH 포맷 2/2a/2b 전송을 위해 가용한 자원 블록을 나타낸다.

는 PUCCH 포맷 1/1a/1b와 2/2a/2b가 혼합되어 사용되는 자원 블록에서 PUCCH 포맷 1/1a/1b를 위해 사용되는 순환 지연의 개수를 나타내고,

의 정수 배이며,

는 상위계층 시그널링을 통해 전달된다. PUCCH 포맷 1/1a/1b, 2/2a/2b, 및 3의 전송을 위해 사용되는 직교 자원은 각각

,

, 및

로 표현된다.

Is the number of subcarriers in one resource block.

Is a value transmitted through upper layer signaling,

Represents a resource block available for PUCCH format 2 / 2a / 2b transmission in each slot.

Represents the number of cyclic delays used for the PUCCH format 1 / 1a / 1b in the resource block in which the PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b are mixed,

Lt; / RTI >

Is transmitted via upper layer signaling. The orthogonal resources used for transmission of the PUCCH formats 1 / 1a / 1b, 2 / 2a / 2b, and 3 are

,

, And

Lt; / RTI >

에 해당하는 자원 블록들이 PUCCH 포맷 2/2a/2b 전송을 위해 사용되고, 이에 대한 정보(

)는 상향링크 시그널링을 통해 전달된다. PUCCH 포맷 2/2a/2b 전송을 위한 자원 블록의 안쪽에서 최대 하나의 자원 블록들이 PUCCH 포맷 1/1a/1b와 2/2a/2b가 혼합되어 사용되고, 이러한 자원 블록에서 PUCCH 포맷 1/1a/1b를 위한 직교 자원이 몇 개인지를 나타내는 파라미터가

에 해당한다. 그 다음 자원 블록들은 PUCCH 포맷 1/1a/1b 전송을 위해 사용된다.Referring to Equation (2), at the edge of the uplink bandwidth

Are used for PUCCH format 2 / 2a / 2b transmission, and information

) Is transmitted through uplink signaling. 1 / 1a / 1b and 2 / 2a / 2b are mixed and used in the resource block for PUCCH format 2 / 2a / 2b transmission, and the PUCCH format 1 / 1a / 1b A parameter indicating how many orthogonal resources for

. The resource blocks are then used for PUCCH format 1 / 1a / 1b transmissions.

에 대하여

만큼의

씩 끊어서 하나씩 증가한다. 즉, PUCCH가 매핑되는 특정 서브프레임 각각에 대하여, 두 개의 슬롯으로 구성된 하나의 서브프레임의 두 개의 자원 블록 내에서의 자원 인덱스(

)의 총 개수는

이고, 이는 자원 블록 내에서 직교성을 갖는 총자원의 개수를 의미한다.In Equation (2), the index of the resource block for only the PUCCH format 1 / 1a / 1b is divided into two slots in one subframe

about

As many

It is increased by one by one. That is, for each specific subframe to which the PUCCH is mapped, a resource index (hereinafter referred to as " resource index ") in two resource blocks of one subframe consisting of two slots

The total number of

, Which means the total number of resources having orthogonality in the resource block.

는 안테나 인덱스(

)에 대하여 PUCCH 포맷 1/1a/1b를 위해 사용되는 전체 직교 자원에 대하여 그 직교 자원의 인덱스를 의미하는 파라미터이고,

는 하나의 자원 블록 내에서 사용되는 전체 직교 자원에 대하여 그 직교 자원의 인덱스를 의미하는 파라미터이다.In other words,

Is an antenna index (

) Is a parameter indicating the index of the orthogonal resource for all orthogonal resources used for the PUCCH format 1 / 1a / 1b,

Is a parameter indicating the index of the orthogonal resource for all orthogonal resources used in one resource block.

A PUCCH resource for each antenna port for HARQ ACK / NACK feedback for a corresponding PDSCH reception of a UE to which PDSCH allocation information for a corresponding UE is transmitted through reception of downlink scheduling information through a conventional legacy PDCCH allocated to a control region of a resource block The mapping is determined by an upper layer parameter (for example, RRC parameter) and a Control Channel Element (CCE) index to which the corresponding downlink scheduling information is transmitted, as shown in Equations 3 and 4 below.

를 지칭한다.

는 해당 하향링크 스케줄링 정보가 전송된 최소 CCE 인덱스값을 나타내고, 이는 동적으로 정의될 수 있다.

는 상위계층 시그널링(예를 들어 RRC 시그널링)에 의해 설정된 단말-특정 파라미터로, PUCCH 포맷 1/1a/1b 자원 할당을 위한 오프셋으로 작용하여 동적으로 할당되는 PUCCH 영역이 시작되는 지점을 결정하게 할 수 있다.Equation (3) and Equation (4) show Equation (3) and Equation (4) are PUCCH resources for HARQ ACK / NACK feedback at antenna port 0 and antenna port 1, respectively,

Quot;

Denotes a minimum CCE index value to which the corresponding downlink scheduling information is transmitted, and this can be dynamically defined.

Specific parameters set by upper layer signaling (e.g., RRC signaling) to serve as an offset for PUCCH format 1 / 1a / 1b resource allocation to determine the point at which a dynamically allocated PUCCH region is to start have.

As described above, in the area where the PUCCH format 2 / 2a / 2b and the PUCCH format 2 / 2a / 2b and 1 / 1a / 1b are mixed, the resource block is semi-static through the upper layer signaling, And the resource block in the area for PUCCH format 1 / 1a / 1b can be determined dynamically. 4, the uplink transmission resource is classified into a quasi-static setting region 410, a dynamic setting region 420 where a PUCCH format 1 / 1a / 1b can be set, and a PUSCH region 430 .

However, the PUCCH resource mapping method according to Equations (3) and (4) can be applied to HARQ ACK / NACK (PUCCH) through a PUCCH format 1a / 1b of a terminal in which one serving cell is set in a frame structure type 1 (FDD) PUCCH resource mapping method for transmission. In addition, the PUCCH resource mapping rule for a terminal on which one or more serving cells are established (i.e., a UE to which carrier aggregation is applied) is a function of a minimum CCE index and a higher layer parameter similar to the above- Or sets a plurality of candidate PUCCH resource values through upper layer signaling in advance and sets a PUCCH resource value to be used among the candidate PUCCH resource values through a 'TPC command for PUCCH' information region of actual downlink scheduling information An ARI (ACK / NACK Resource Indication) scheme indicating a resource may be used.

FIG. 5 shows one resource block pair of a DL subframe in the case of a normal cyclic prefix (CP) in a LTE (Long Term Evolution) or LTE-Advanced (LTE-Advanced) system.

Referring to FIG. 5, in the case of a normal CP (normal cyclic prefix), one resource block pair of the DL subframe may include 14 × 12 resource elements (12 × 12 in the case of an extended CP). A Resource Element (RE) can be composed of one OFDM symbol on the time axis and one subcarrier on the frequency axis.

The first four OFDM symbols (l = 0 to 3) among the fourteen OFDM symbols belonging to one resource block pair include a Physical Control Format Information CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Downlink Control CHannel And the remaining OFDM symbols (l = 4 to 13) are data areas 520 allocated for data channels such as PDSCH (Physical Downlink Shared CHannel) have. Although it is shown that four OFDM symbols are allocated for the control domain 510 in FIG. 5, it is possible for one to four OFDM symbols to be allocated for the control domain 510. FIG. The size information of the OFDM symbol in the control region 510 may be transmitted via the PCFICH.

A reference signal may be mapped to a specific resource element of the downlink. In other words, a common reference signal or a cell-specific reference signal (CRS) 530, a demodulation reference signal, or a UE-specific reference signal (DM-RS) 532 and 534, a channel status information reference signal (CSI-RS), and the like. 5, only the CRS 530 and DM-RSs 532 and 534 are shown for convenience of explanation.

The CRS 530 located in the control region 510 may be used for channel estimation for decoding the PDCCH and the CRS 530 located in the data region 520 may be used for the downlink channel measurement. Channel estimation for data decoding of the data area 520 may be performed using DM-RSs 532 and 534.

The resources of the control area 510 reduce the resources of the data area 520 used for data transmission as an overhead of the system. On the other hand, in the LTE-A system capable of transmitting data to a larger number of users, system capacity increase can be limited due to the resources of the conventional limited control region 510. Therefore, an increase in control channel resources is inevitable, so that a control channel transmission / reception method of multiple users using the spatial division multiplexing technique in the data area 520 can be considered. This method transmits / receives a control channel in the data area 520. For example, the control channel transmitted in the data area 520 may be called EPDCCH (Extended PDCCH or Enhanced PDCCH), but is not limited thereto.

In the data area 520, control channel resources may be allocated on a resource block (or resource block pair) basis for compatibility with a data channel (e.g., PDSCH) resource. Since a decoding reference signal (DM-RS) can be used when transmitting a control channel in the data area 520, a control channel can be transmitted using a beam forming technique.

In this specification, allocation of control information is used in the same sense as allocation of a control channel. In other words, the allocation of control channels in this specification means allocating control information to resource elements.

The EPDCCH can be transmitted through some PRBs of a plurality of EPDCCH sets that are composed of X PRB (a group of X PRBs) (X is a natural number equal to or less than one or more PRBs of the entire band)

Depending on the EPDCCH transmission type, the EPDCCH set may be a localized type or a distributed type, where X is 1 or 2 ⁿ (n = 1, 2, 3, 4 , 5). While X may be 2, 4, 8, 16 in the decentralized form, but is not limited thereto.

The set of K (K = 1) EPDCCHs can be configured to be UE-specific. In this case, the maximum value for K may be any one of 2, 3, 4, and 6, but is not limited thereto. The K EPDCCH sets may not all have the same X PRB pairs.

Each EPDCCH set may be configured for a centralized EPDCCH or a distributed EPDCCH. That is, each EPDCCH set can not be composed of a mixture of a centralized EPDCCH or a distributed EPDCCH. For example, the set of K EPDCCHs can be configured with KL sets (KL = 0) for the centralized EPDCCH and KD sets (KD = 0) for the distributed EPDCCH. At this time, KL and KD may be zero.

Meanwhile, K sets of EPDCCHs can be allocated for one terminal. Since each EPDCCH set is a distributed type or a centralized type, KL centralized type EPDCCHs and KD distributed type EPDCCHs are allocated for one terminal . That is, KL + KD = K can be obtained.

In this case, the combination of KL and KD is {KL = 1, KD = 0}, {KL = 0, KD = 1}, {KL = 1, KD = 1}, {KL = 0, KD = 2}, {KL = 2, KD = 0}.

The PDCCH is composed of 9 to 72 REGs according to the downlink control information (DCI) format, which is the reception control information of the UE, and the aggregation level, to increase the reliability of the PDCCH. A minimum of 9 REGs is required because the DCI format must be able to transmit up to 70 bits of information. Because one RE is modulated with QPSK, it transmits 2 bits, so 35 REs are needed, so 36 REs = 9 REGs is the minimum unit. The PDCCH has a control channel element (CCE) composed of nine REGs as a basic unit.

A resource element grouping in a similar manner can be used to assign control information in the data area. In other words, an EREG can be configured by grouping a plurality of resource elements (REs) in a data area, and an ECCE composed of a plurality of EREGs can be formed. The plurality of resource elements are grouped and described as EREG to compare with REG used in the legacy PDCCH, but are not limited thereto.

The control information allocated to the data area can be allocated to this ECCE as a basic unit. In other words, EPDCCH can be assigned ECCE as a basic unit.

The EREG can be grouped according to the characteristics of the index assigned to each Resource Element (RE) of the PRB.

FIG. 6 shows examples of assigning indexes to resource elements in a resource block pair (PRB pair).

Referring to FIG. 6, an index is given by repeating 16 numbers in a resource block pair in frequency priority order. Indexes are assigned to each resource element sequentially from 0 according to the frequency in the same symbol area, and when the index assignment in one symbol area is completed, the resource element of the next symbol area adjacent to or closest to the index assigned last is index The index can be given to the entire resource element. Here, indexes are assigned to each resource element from 0 to 15, and then indexes are sequentially given from 0 to 15.

Resource elements having the same index on the index of these resource elements can be grouped into one EREG. When constructing the EREG with resource elements having the same index, there are 16 EREGs in one resource block pair.

One ECCE can be formed by grouping four or eight EREGs as described above.

In the convergence type EPDCCH transmission, the ECCEs to which the EPDCCH is allocated exist in one resource block pair, and the ECCEs to which the EPDCCH is allocated in the dispersion type EPDCCH transmission can exist in two or more resource block pairs.

FIG. 7 shows two EPDCCH transmission types, a localized EPDCCH transmission and a distributed EPDCCH transmission.

Let N _{PRB be} the number of downlink physical resource blocks (PRBs) constituting the system band supported by any cell configured by the communication service provider. In this case, as shown in (a) and (b) of FIG. 7, the EPDCCH transmitted through the corresponding PDSCH region may have two types of EPDCCH transmission, that is, a concentrated type EPDCCH transmission and a distributed type EPDCCH transmission. Accordingly, the ECCE structure and the number of resource elements (REs) constituting one ECCE may vary depending on the EPDCCH transmission type, but may be the same regardless of the EPDCCH transmission type.

The concentrated type EPDCCH transmission shown in FIG. 7A means that one ECCE is located in one resource block pair and is transmitted. Meanwhile, the distributed EPDCCH transmission shown in FIG. 7 (b) means that one ECCE is located in at least two resource block pairs.

The ECCE corresponds to a certain number of Resource Element Groups (EREGs). Each EREG refers to a certain number of available resource elements (Resource Elements, REs). In conclusion, ECCE refers to a set of available resource elements for EPDCCH transmission. The number of ECCEs required for a particular EPDCCH depends on the size of the control information (DCI payload) and the channel coding rate. At this time, the number of ECCEs required for a specific EPDCCH is called an aggregation level (AL).

In this specification, the number of REs constituting the ECCE for the convergence-type EPDCCH transmission is N _{ECCE, L} , and the number of REs constituting the ECCE for the distributed EPDCCH transmission is N _{ECCE , D.} In this case, if the maximum number of REs that can be used for EPDCCH transmission in one PRB or VRB (Virtual Resource Block) is N _{RB , RE} , the number of ECCEs that can be transmitted through the corresponding PRB (or VRB) [N _{RB , RE} / N _{ECCE , L} ] for EPDCCH transmission and [N _{RB , RE} / N _{ECCE , D} ] for distributed EPDCCH transmission. That is, when the number of REs used for other downlink physical signals and physical channels in the corresponding PRB (or VRB) is the smallest, the maximum number of ECCEs that can be transmitted through the corresponding PRB depends on the EPDCCH transmission type [N _{RB , RE} / N _{ECCE , L} ], and [N _{RB , RE} / N _{ECCE , D} ].

In order to improve the capacity of the downlink control channel in the LTE-A system, a PUCCH for uplink HARQ ACK / NACK feedback of a UE receiving downlink scheduling information through an EPDCCH newly introduced in a data area (PDSCH region) There is a need for definition of resource setting and mapping method.

The present invention provides a PUCCH resource setting and mapping method for uplink HARQ ACK / NACK feedback of a UE receiving downlink scheduling information through a newly introduced EPDCCH. In particular, the present invention defines an implicitly determined part and an explicitly determined part for determining a PUCCH resource mapping for a UE receiving downlink control information (DCI) through an EPDCCH . ≪ / RTI >

(수학식 (3) 및 (4)의

에 해당) 및 명시적 결정 파라미터(explicitly determined parameter)

(수학식 (3) 및 (4)의

에 대한 modification parameter)를 포함하는 식으로 표현될 수 있다. 즉 해당 안테나 포트별 PUCCH 자원은 각각 아래의 수학식 5 및 6에 의해 결정된다.In the present invention, a function for PUCCH resource mapping is an implicitly determined parameter determined by the ECCE as a method similar to Equations (3) and (4)

(Equations (3) and (4)

And an explicitly determined parameter)

(Equations (3) and (4)

And a modification parameter for < / RTI > That is, the PUCCH resources for the respective antenna ports are determined by the following equations (5) and (6), respectively.

및 명시적 결정 옵셋 추가 파라미터(explicitly determined offset)

을 더 포함시켜 아래의 수학식 7 및 8과 같이 PUCCH 자원 매핑을 위한 함수를 결정할 수도 있다.Additionally, in addition to this, an implicitly determined offset parameter

And an explicitly determined offset.

To determine a function for PUCCH resource mapping as shown in Equations (7) and (8) below.

,

,

,

)들의 실시예들에 대해 살펴본다.
In the following,

,

,

,

) Will now be described.

실시예

Example

에 대해 살펴본다.

는 명시적으로 결정되고, 그 명시적 정보는 상위 계층 시그널링을 통해 전송될 수 있다(explicitly determined, higher layer configured parameter,

).first,

.

Is explicitly determined, and the explicit information can be transmitted through higher layer signaling (explicitly determined, higher layer configured parameter,

).

는 수학식 3 내지 4에서

에 대응하는 값(

는 상위계층 시그널링에 의해 설정된 단말-특정 파라미터로, PUCCH 포맷 1/1a/1b 자원 할당을 위한 오프셋으로 작용하여 동적으로 할당되는 PUCCH 영역이 시작되는 지점을 결정하게 할 수 있음)으로 자원할당을 위한 오프셋으로 작용하여 PUCCH 영역이 시작되는 지점을 결정하게 할 수 있는데, 이러한 의미에서

는 PUCCH 자원 스타팅 옵셋 지시 값으로 부를 수 있으며,

값을 포함하는 상위 계층 시그널링은 자원 스타팅 옵셋 지시 정보로 부를 수 있다.
As an explicit decision parameter

≪ RTI ID = 0.0 >

(&Quot;

Specific parameters set by upper layer signaling may serve as offsets for PUCCH format 1 / 1a / 1b resource allocation to determine the point at which a dynamically allocated PUCCH area is to be started) It can act as an offset to determine where the PUCCH area starts,

May be referred to as a PUCCH resource starting offset indication,

The upper layer signaling including the value may be referred to as resource starting offset indication information.

값이 해당 셀 내의 모든 단말에게 동일하게 적용되었다. 본 발명에서는 EPDCCH를 통해 PDSCH 전송에 대한 하향링크 스케줄링 정보(DL scheduling grant)를 수신하도록 설정된 단말을 위한 상향링크 HARQ ACK/NACK 자원 매핑 방안 중 수학식 5 내지 8의

에 해당하는 값을 결정하는 첫번째 방안으로서 레거시 PDCCH 단말을 위한 셀-특정 RRC 파라미터(cell-specific RRC parameter)인

을 재사용하여 적용할 수 있다. 이 경우, EPDCCH를 통해 DCI를 수신하도록 설정된 단말의 경우에도 기존의 레거시 PDCCH를 통해 DCI를 수신하는 단말과 동일하게 기지국으로부터 수신한 시스템 정보(system information)에 포함된 상기의

값을 상향링크 HARQ ACK/NACK 전송을 위한 PUCCH 자원 매핑 시 활용하도록 동작할 수 있다. According to the related art, in the case of a UE receiving DL scheduling grant for PDSCH transmission through a legacy PDCCH, a UE for receiving a DL-scheduling grant from the Node B for mapping of the uplink HARQ ACK / RRC (Radio Resource Control) parameters transmitted via cell-specific higher layer signaling

The same applies to all terminals in the cell. In the present invention, among the uplink HARQ ACK / NACK resource mapping schemes for a UE set to receive downlink scheduling information (DL scheduling grant) for PDSCH transmission through EPDCCH,

As a first method for determining a value corresponding to a cell-specific RRC parameter for a legacy PDCCH terminal

Can be reused and applied. In this case, even in the case of a UE set to receive the DCI through the EPDCCH, the same as the UE receiving the DCI over the existing legacy PDCCH,

Value to the PUCCH resource mapping for the uplink HARQ ACK / NACK transmission.

를 결정하는 또 다른 방안으로서 EPDCCH를 통해 DCI를 수신하도록 설정된 단말의 경우, 상기의

를 단말-특정 상위 계층 시그널링(UE-specific higher layer signaling)을 통해 각각의 단말 별로 독립적으로 설정하도록 할 수 있다. 즉, 해당 송수신포인트는 임의의 단말에 대해 EPDCCH를 통해 DCI를 수신하도록 설정 시, 해당 단말을 위한

값을 전송하도록 하며, 단말은 이를 기반으로 수학식 5 내지 8에 의한 PUCCH 자원 매핑을 적용하도록 한다.

In the case of a terminal set to receive the DCI via the EPDCCH,

May be independently set for each UE through UE-specific higher layer signaling. That is, when the corresponding transmission / reception point is set to receive a DCI through an EPDCCH for an arbitrary terminal,

And the UE applies the PUCCH resource mapping according to Equation (5) to (8) on the basis thereof.

를 결정하는 또 다른 방안으로서 EPDCCH를 통해 DCI를 수신하도록 설정된 단말의 경우,

를 단말-특정 상위 계층 시그널링 통해 각각의 단말 별로 독립적으로 설정할 수 있다. 단, 이 경우 단일

값이 아니라, 분산형 EPDCCH 셋(distributed EPDCCH USS(a set of PRBs for distributed EPDCCH transmission))을 통해 전송된 하향링크 스케줄링 정보 기반의 PDSCH 전송을 위한

값과 집중형 EPDCCH 셋(localized EPDCCH USS(a set of PRBs for localized EPDCCH transmission))을 통해 전송된 하향링크 스케줄링 정보 기반의 PDSCH 전송을 위한

값을 별도로 할당할 수 있다. 즉, 임의의 단말을 위해 2개의

및

를 할당하고 해당 단말을 위한 분산형 EPDCCH 셋을 통한 PDSCH 할당과 집중형 EPDCCH 셋을 통한 PDSCH 할당에 대해 수학식 5 내지 8의 PUCCH 자원 매핑 식을 적용할 때 각각

과

을 적용하도록 할 수 있다.

As another method for determining a DCI, in the case of a UE set to receive a DCI via EPDCCH,

Can be independently set for each terminal through terminal-specific upper layer signaling. However, in this case,

Value for a PDSCH transmission based on downlink scheduling information transmitted through a distributed EPDCCH set (distributed set of PRBS for distributed EPDCCH USS)

Value and a PDSCH transmission based on downlink scheduling information transmitted through a localized EPDCCH USS (a set of PRBs for localized EPDCCH transmission)

You can assign values separately. That is, for an arbitrary terminal, two

And

When applying the PUCCH resource mapping equations of Equations (5) to (8) to the PDSCH allocation through the distributed type EPDCCH set for the UE and the PDSCH allocation through the centralized type EPDCCH set

and

.

를 결정하는 또 다른 방안으로서 EPDCCH를 통해 DCI를 수신하도록 설정된 단말의 경우,

를 단말-특정 상위 계층 시그널링을 통해 각각의 단말 별로 독립적으로 설정할 수 있다. 단, 이 경우 단일

값이 아니라, 분산형 EPDCCH 셋을 통해 전송된 하향링크 스케줄링 정보 기반의 PDSCH 전송을 위한

값과 집중형 EPDCCH 셋을 통해 전송된 하향링크 스케줄링 정보 기반의 PDSCH 전송을 위한

값을 별도로 할당할 수 있다. 즉, 임의의 단말을 위해 2개의

및

를 할당하고 해당 단말을 위한 분산형 EPDCCH 셋을 통한 PDSCH 할당과 집중형 EPDCCH 셋을 통한 PDSCH 할당에 대해 수학식 5 내지 8의 PUCCH 자원 매핑 식을 적용할 때 각각

과

을 적용하도록 할 수 있다. 또한 추가적으로 EPDCCH를 통해 DCI를 수신하도록 설정된 임의의 단말을 위한 EPDCCH 전송 타입(분산형 혹은 집중형) 별로 혹은 임의의 EPDCCH 전송 타입에 대해 각각 하나 이상의 자원블록 쌍(a group of X PRBs, X는 1 이상이며 전대역의 PRB들의 개수 이하의 자연수)으로 구성된 복수의 EPDCCH 셋이 할당될 경우에도 각각의 EPDCCH 셋별로 별도의 단말-특정 상위 계층 시그널링 파라미터

을 할당할 수 있다. (여기서, 하나의 EPDCCH 셋을 구성하는 자원블록 쌍의 개수 X는 집중형에 대해 X=(1), 2, 4, 8 그리고 분산형에 대해 X= 2, 4, 8, (16)일 수 있다) 예를 들어, EPDCCH를 통해 DCI를 수신하도록 설정된 임의의 단말(e.g UE1)을 위해 집중형 EPDCCH 검색 공간(localized EPDCCH search space)을 구성하는 EPDCCH 셋 #1 ~ EPDCCH 셋 #K_L까지 K_L개의 EPDCCH 셋이 할당되고, 분산형 EPDCCH 검색 공간(distributed EPDCCH search space)을 구성하는 EPDCCH 셋 #1 ~ EPDCCH 셋 #K_D까지 K_D개의 EPDCCH 셋이 할당될 수 있다. 이 경우, 각각 집중형 타입의 EPDCCH 셋 #m (for m=1,…,K_L)에 대해 각각 별도의

(for m=1,…,K_L)을 할당할 수 있다. 마찬가지로 분산형 타입 의 EPDCCH 셋 #n (for n=1,…, K_D)에 대해 각각 별도의

(for n=1,…, K_D)을 할당할 수 있다. 즉, 임의의 단말을 위해 K_L개의 집중형 EPDCCH 셋과 K_D개의 분산형 EPDCCH 셋의 총 P(P= K_L+K_D)개의 EPDCCH 셋이 할당된 경우, 해당 단말을 위해 각각의 셋 별 PUCCH 자원 매핑을 위한 P개의 상위 계층 설정 파라미터

(p=1,…, K_L+K_D)가 단말-특정 RRC 시그널링을 통해 할당될 수 있다.

As another method for determining a DCI, in the case of a UE set to receive a DCI via EPDCCH,

Can be independently set for each terminal through terminal-specific upper layer signaling. However, in this case,

Values for PDSCH transmission based on the downlink scheduling information transmitted through the distributed EPDCCH set

Value and a PDSCH based on downlink scheduling information transmitted through a centralized EPDCCH set

You can assign values separately. That is, for an arbitrary terminal, two

And

When applying the PUCCH resource mapping equations of Equations (5) to (8) to the PDSCH allocation through the distributed type EPDCCH set for the UE and the PDSCH allocation through the centralized type EPDCCH set

and

. Also, each of the EPDCCH transmission types (distributed or centralized) for any terminal configured to receive the DCI via the EPDCCH, or a group of X PRBs, where X is 1 And a natural number equal to or less than the number of PRBs in all bands) is allocated to each EPDCCH set, a separate UE-specific upper layer signaling parameter

. ≪ / RTI > (Here, the number X of resource block pairs constituting one EPDCCH set can be X = (1), 2, 4, 8 for the centralized type and X = 2, 4, 8, has), for example, any of the terminals are configured to receive the DCI through EPDCCH (EPDCCH set to # 1 ~ EPDCCH set #K _L constituting the convergent EPDCCH search space (localized EPDCCH search space) for eg UE1) K _L EPDCCH of being set is assigned, it can be assigned a distributed EPDCCH search space (distributed EPDCCH search space) configuration EPDCCH set # 1 ~ EPDCCH set #K _D K _D of EPDCCH set up to. In this case, each for each convergent type EPDCCH set #m (for m = 1, ... , K L) separate

(for m = 1, ..., K _L ). Similarly, for the distributed type EPDCCH set #n (for n = 1, ..., K _D )

(for n = 1, ..., K _D ). That is, if any to the terminal K _L of the centralized EPDCCH set and K _D of Total P (P = K _L + K _D) of the distributed EPDCCH set of EPDCCH set is assigned to each specific set for the corresponding mobile station P upper layer configuration parameters for PUCCH resource mapping

(p = 1, ..., K _L + K _D ) may be allocated via the terminal-specific RRC signaling.

값을 적용하도록 할 수 있다.In this case, for the PUCCH resource mapping for the uplink HARQ ACK / NACK feedback for the PDSCH transmission, the corresponding UE corresponds to the EPDCCH set to which the downlink scheduling information for which the corresponding PDSCH resource allocation is transmitted

Value can be applied.

정보를 이용하여 PUCCH 자원을 설정하고 매핑하는 방법의 흐름을 도 8 내지 도 10을 통해 살펴본다.Such

A flow of a method of setting and mapping a PUCCH resource using information will be described with reference to FIG. 8 through FIG.

) 정보를 이용하여 PUCCH 자원을 설정하는 방법(800)의 흐름도이다.FIG. 8 is a flow chart illustrating a method for determining whether a transmission /

) Information of the PUCCH resource (800).

Referring to FIG. 8, a transmission / reception point for transmitting control information for a mobile station through a data block of a resource block pair of a subframe is a PUCCH (Physical Uplink Control Channel) At least one downlink control channel set consisting of X resource blocks (X = 2, 4, 8, 16) of at least one downlink control channel The physical uplink control channel (PUCCH) resource starting offset indication information for each of the set of channels (EPDCCH set) to the mobile station (S820).

The control information transmitted to the UE by the transmission / reception point may include downlink scheduling information, and the control information may include at least one control of one set of the downlink control channels of the at least one downlink control channel set (EPDCCH set) May be transmitted to the UE through an enhanced control channel element (ECCE).

The minimum index of the control channel element to which the control information is transmitted and the PUCCH resource starting offset indication information transmitted in step S820 are used for mapping the PUCCH resource mapping of the ACK / NACK for the PDSCH (Physical Downlink Shared Channel) allocated according to the downlink scheduling information It can be used as a determinant.

값으로 사용되고, PUCCH 자원 스타팅 옵셋 지시 값은

값으로 사용될 수 있다.Referring back to Equations 5 to 8, the minimum index of the control channel element over which control information is transmitted is

Value, and the PUCCH resource starting offset indication is

Value. ≪ / RTI >

The resource starting offset indication information transmitted in step S820 may be transmitted through upper layer signaling, and upper layer signaling may be an RRC (Radio Resource Control).

The control information transmitted to the UE by the transmission / reception point may include downlink scheduling information, and the downlink scheduling information may include dynamic offset indication information.

값을 다이나믹 옵셋 지시 값으로 정의할 수 있는데,

값이 상위 계층 시그널링을 통해 준정적(semi-static)으로 결정되는 값인데 비해

값은 단말로 전송되는 제어정보를 통해 지시할 수 있다는 의미에서 다이나믹 옵셋 지시 값으로 부를 수 있다.Further, in Equations (7) to (8)

The value can be defined as a dynamic offset indication value,

Value is determined to be semi-static through upper layer signaling

Value may be referred to as a dynamic offset indication value in the sense that it can be indicated through the control information transmitted to the terminal.

In the case of transmitting the dynamic offset indication information through the downlink scheduling information, the dynamic offset indication information can be used as another resource determining element in the PUCCH resource mapping of the ACK / NACK for the PDSCH allocated according to the downlink scheduling information.

,

,

및

의 네 가지 자원 결정 요소에 의해 결정될 수 있다.Referring back to Equations (7) to (8), the PUCCH resource mapping

,

,

And

And can be determined by four resource decision factors.

및

에 대한 구체적인 실시예는 후술한다.

And

Will be described later in detail.

FIG. 9 is a flowchart illustrating a method for determining whether an MS transmits an explicit determination parameter ) Information of the PUCCH resource (900).

9, for each set of at least one enhanced physical downlink control channel configured with X resource block pairs (X is a natural number greater than 1) of a subframe, the UE transmits a Physical Uplink Control Channel (PUCCH) Receiving the resource starting offset indication information from the transmission / reception point (S910). Such resource starting offset indication information may be received via higher layer signaling (e.g., RRC).

X = 2, 4, 8, (16), and (32) in X resource block pairs constituting one EPDCCH set. At this time, depending on the type of the EPDCCH set, the EPDCCH set may or may not comprise up to 16 resource block pairs. For example, a distributed EPDCCH set can be composed of 16 resource block pairs, but a centralized EPDCCH set can be composed of a maximum of 8 resource block pairs.

The UE receives downlink scheduling control information from at least one transmission / reception point through at least one control channel element of one downlink control channel set of the at least one downlink control channel set (EPDCCH set) (S920).

The UE uses the resource starting offset indication information and the minimum index of the control channel element as a resource decision element when mapping an ACK / NACK PUCCH resource allocated to a Physical Downlink Shared Channel (PDSCH) according to the downlink scheduling control information The PUCCH resource is mapped (S930).

값으로 사용되고, PUCCH 자원 스타팅 옵셋 지시 값은

값으로 사용될 수 있다.Referring back to Equations 5 to 8, the minimum index of the control channel element over which control information is transmitted is

Value, and the PUCCH resource starting offset indication is

Value. ≪ / RTI >

를 더 이용하여 PUCCH 자원을 매핑할 수 있다.
The downlink scheduling control information may include dynamic offset indication information, and the terminal may include dynamic offset indication information as shown in Equations (7) to (8)

Can be used to map the PUCCH resource.

실시예

Example

의 실시예를 살펴본다.

는 묵시적으로 결정될 수 있다(implicitly determined parameter,

).As the other parameters used in Equations 5 to 8

An embodiment of the present invention will be described.

Can be implicitly determined (parameterized,

).

The number of downlink resource block pairs PRB (Physical Resource Block) constituting a system band supported by an arbitrary cell configured by a communication service provider is N _PRB . In this case, the EPDCCH transmitted through the corresponding PDSCH region may have two types of EPDCCH transmission types: localized EPDCCH transmission and distributed EPDCCH transmission. Accordingly, the number of REs (Resource Elements) constituting the ECCE structure and one ECCE can be changed according to the EPDCCH transmission type. In the present invention, the number of REs constituting the ECCE for the centralized EPDCCH type is N _{ECCE , L} , and the number of REs constituting the ECCE for the distributed EPDCCH type is N _{ECCE , D.} In this case, if the maximum number of REs that can be used for EPDCCH transmission in one PRB or VRB is N _{RB , RE} , then the number of ECCEs that can be transmitted through the corresponding PRB (or VRB) [N _{RB , RE} / N _{ECCE , L} ] for the EPDCCH type, and [N _{RB , RE} / N _{ECCE , D} ] for the distributed EPDCCH type. That is, when the number of REs used for other downlink physical signals and physical channels in the corresponding PRB (or VRB) is the smallest, the maximum number of ECCEs that can be transmitted through the corresponding PRB depends on the EPDCCH transmission type [N _{RB , RE} / N _{ECCE , L} ], and [N _{RB , RE} / N _{ECCE , D} ].

값으로써, 해당 EPDCCH가 집중형 EPDCCH 전송일 경우, n_PRB *[N_{RB , RE}/N_{ECCE ,L}]을 대응하고, 해당 EPDCCH가 분산형 EPDCCH 전송 일 경우, n_PRB *[N_{RB , RE}/N_{ECCE ,D}]을 대응하도록 한다. Accordingly, when a certain PRB (or VRB) index among the PRBs (or VRBs) used for the EPDCCH transmission for the UE is n _PRB , the UE transmits the uplink HARQ ACK / NACK feedback of the UE For PUCCH resource mapping

If the corresponding EPDCCH is a centralized EPDCCH transmission, n _PRB * [N _{RB , RE} / N _{ECCE , L} ], and when the corresponding EPDCCH is a distributed EPDCCH transmission, n _PRB * [N _{RB , RE} / N _{ECCE , D} ].

값이 결정되도록 할 수 있다. 예를 들어 단말의 N번째 블라인드 디코딩 을 통해 해당 하향링크 스케줄링 정보를 수신한 경우, 상기의

값으로 N을 적용하도록 할 수 있다. As a function of the number of blind decoding attempts to receive the downlink scheduling information,

Value can be determined. For example, when the corresponding downlink scheduling information is received through the Nth blind decoding of the UE,

The value N can be applied.

To do this, it is necessary to define a blind decoding procedure of the UE set up to receive the DCI through the EPDCCH. An EPDCCH transmission type dependent blind decoding scheme according to an EPDCCH transmission type can be defined as an EPDCCH blind decoding procedure of the corresponding terminal. When both the distributed EPDCCH search space and the centralized EPDCCH search space are set for an arbitrary terminal (a terminal set to EPDCCH), blind decoding is first performed on the distributed EPDCCH search space, and then blind decoding for the centralized EPDCCH search space Decoding can be performed. In this case, the UE performs blind decoding on the distributed EPDCCH search space in the order of ECCE aggregation levels 1, 2, 4, and 8, and then moves to the concentrated EPDCCH search space to obtain an ECCE aggregation level 1 , 2, 4, 8 in order. Alternatively, it may be defined to perform blind decoding in such a manner that the centralized EPDCCH search space is advanced first.

Another approach is to define an aggregation level dependent blind decoding scheme based on the aggregation level. In this case, blind decoding is performed in order of ECCE aggregation levels 1, 2, 4, and 8. That is, when a distributed EPDCCH search space and a centralized EPDCCH search space are all set in an arbitrary terminal, blind decoding is performed on the set level 1 of the distributed EPDCCH search space in the order of a low set level to a high set level, It is possible to define that the blind decoding is performed for the set level 1 of the EPDCCH transmission type, and then the blind decoding is similarly performed for the set levels 2, 4, and 8. Or may be defined to perform blind decoding in a manner of high aggregation level first in the opposite order.

In this case, the order of the blind decoding is applied only to the downlink scheduling information, and the DCI format 1A, which is the fallback DL scheduling information of the downlink scheduling information, And the PDSCH transmission mode dependent DCI format according to the PDSCH transmission mode may be sequentially sequenced.

값으로 적용하도록 할 수 있다. 이를 위한 ECCE 인덱싱은 EPDCCH 전송 타입에 따른 검색 공간별로 인덱스를 정의할 수 있다. 즉, 임의의 단말을 위한 EPDCCH 검색 공간으로서 각각 M개의 자원블롯 쌍, PRB(s)가 분산형 EPDCCH 검색 공간으로서 할당되고, L개의 PRB(s)가 집중형 EPDCCH 검색 공간이 설정된 경우, 각각 M값에 따라 분산형 EPDCCH 검색 공간 영역에 생성되는 ECCE의 수 n_{ECCE ,D}값 및, L값에 따라 집중형 EPDCCH 검색 공간에 생성되는 ECCE의 수 n_{ECCE ,L}값이 결정된다. 이에 따라 해당 단말의 ECCE 인덱싱 방안으로서 분산형 EPDCCH 검색 공간의 ECCE들에 대해 0 ~ (n_{ECCE ,D} - 1)까지 인덱싱을 한 후, 집중형 EPDCCH 검색 공간을 구성하는 ECCE들에 대해 이어서 n_{ECCE ,D} ~ (n_{ECCE ,D} + n_{ECCE ,L} - 1)의 순서로 ECCE 인덱스를 정의할 수 있다. In the case of a UE set to receive a DCI through EPDCCH, the UE performs ECCE indexing in a search space set in the UE-specific search space, and the lowest ECCE index of the control channel element to which the downlink scheduling information is transmitted ) In the above

Value. ≪ / RTI > For this purpose, ECCE indexing can define an index for each search space according to the EPDCCH transmission type. That is, when M resource block pairs, PRB (s) are allocated as distributed EPDCCH search spaces and L PRB (s) is set as a concentrated EPDCCH search space as an EPDCCH search space for an arbitrary terminal, M depending on the value of the number generated ECCE for distributed EPDCCH search space area n _ECCE, and the _D value, the number of ECCE is generated in a centralized EPDCCH search space depending on the value L n _ECCE, the _L value is determined. The 0 to about the ECCE for distributed EPDCCH search space as the ECCE indexing scheme for the terminal according to (n _{ECCE, D} - 1) and then indexing through, then n _ECCE for the ECCE constituting the convergent EPDCCH search space _{, D} ~ (n _{ECCE , D} + n _{ECCE , L} - 1).

Alternatively, ECCE indexing may be separately performed in the distributed EPDCCH search space and the centralized EPDCCH search space. In this case, an ECCE index is defined from 0 to (n _{ECCE , D} - 1) for the ECCEs in the scattered EPDCCH search space, and then 0 for the ECCEs separately constituting the concentrated EPDCCH search space The ECCE index can be defined in the order of (n _{ECCE , L} - 1).

값으로 적용하도록 할 수 있다.In case of a UE set to receive the DCI through the EPDCCH, the UE performs ECCE indexing for each UE within the UE-specific search space, and the lowest ECCE index of the control channel component to which the downlink scheduling information is transmitted,

Value. ≪ / RTI >

In the case of a UE set to receive a DCI through an EPDCCH as an ECCE indexing method, a resource block (s) allocated for transmission of an EPDCCH for a corresponding UE and an ECCE Indexing can be performed.

For example, if the maximum number of localized ECCEs that can be transmitted through one PRB is L _max , the corresponding L _max is determined as L _max = [N _{RB , RE} / N _{ECCE , L} ] .

라 하면, 해당 PRB(혹은 VRB)의 집중형 ECCE 인덱스는 최소(lowest) ECCE부터 순서대로

로 인덱스를 부여하도록 할 수 있다. Presently, k PRBs (or VRBs) are consecutively allocated from the PRB (or VRB) #n to the PRB (or VRB) # (n + k-1) for the centralized EPDCCH transmission for an arbitrary terminal , The number of concentrated ECCEs defined through the k PRBs (or VRBs)

, The concentration type ECCE index of the corresponding PRB (or VRB) is ranked in order from the lowest ECCE

To be indexed.

라 하면, 해당 PRB(혹은 VRB)의 분산형 ECCE 인덱스는 최소(lowest) ECCE부터 순서대로 0 ~ (KECCE ,D - 1)로 인덱스를 부여하도록 할 수 있다.On the other hand, if m distributed or continuous PRBs (or VRBs) are allocated for the distributed EPDCCH transmission for the UE, the number of distributed ECCEs defined through the corresponding PRBs

, The distributed ECCE index of the PRB (or VRB) can be indexed from 0 to (KECCE, D - 1) in order from the lowest ECCE.

값에 적용하도록 할 수 있다.
In the case of a UE set to receive a DCI through EPDCCH, the lowest PRB (or VRB) index among the PRBs (or VRBs) used for EPDCCH transmission for the corresponding terminal

Value.

실시예

Example

의 실시예를 살펴본다(implicitly determined offset,

)As the parameters used in Equations (7) to (8)

(Implicitly determined offset, < RTI ID = 0.0 >

)

(implicitly determined parameter)와

(explicitly determined parameter)에 추가적으로 묵시적 결정 옵셋(implicitly determined offset)값인

값이 도입될 수 있다. 이처럼

가 도입될 경우, 해당 값은 해당 단말을 위한 하향링크 스케줄링 정보가 전송된 최소 ECCE의 DM RS(Demodulation Reference Signal) 안테나 포트 넘버(antenna port number), 집합 레벨(aggregation level), 해당 단말의 C-RNTI(cell Radio Network Temporary Identifier)와 해당 셀의 시스템 대역폭(bandwidth), 자원블록 쌍 개수(N_PRB)등의 파라미터들의 서브셋(subset)을 매개변수로 하는 함수값으로써 결정될 수 있다.The uplink HARQ ACK / NACK PUCCH resource mapping function for any UE set to receive the DCI through the EPDCCH,

(implicitly determined parameter)

in addition to an explicitly determined parameter, an implicitly determined offset value

Value can be introduced. Likewise

The corresponding value is an antenna port number, an aggregation level, a demodulation reference signal (DM RS) antenna port number of the minimum ECCE to which the downlink scheduling information for the UE is transmitted, a C- A function value having as a parameter a subset of parameters such as a cell radio network temporary identifier (RNTI), a system bandwidth of the cell, a number of resource block pairs (N _PRB ), and the like.

에서 임의의 서브프레임 k에서 PDCCH의 전체 제어채널요소의 수(total number of CCE) N_{CCE ,K}값만 N_PRB로 대체하여 적용할 수 있다.As one embodiment, a hashing function for determining a UE-specific search space of a UE according to an aggregate level of an existing legacy PDCCH can be reused. In this case, a hashing function for determining a search space of a terminal according to an aggregation level

The total number of CCEs of the PDCCH in an arbitrary subframe k, N _{CCE , and the} value of _K can be replaced with N _PRB .

값을 결정할 수도 있다. 이에 대한 한 예로써, 아래의 식 (5)가 적용될 수 있다. As another alternative, if the DM RS port of the EPDCCH for the terminal is p,

Value may be determined. As an example of this, the following equation (5) can be applied.

이다.
In Equation (9)

to be.

실시예

Example

의 실시예를 살펴본다(explicitly determined offset,

).As the parameters used in Equations (7) to (8)

(Explicitly determined offset,

).

값을 정의하고, 이를 해당 하향링크 스케줄링 정보 내의 ARI값에 따라 해당 단말에 적용하도록 할 수 있다. 이를 위해 하향링크 스케줄링 정보를 위한 DCI 포맷들(즉, DCI 포맷 1A, 2A, 2B, 2C 등)에 새롭게 ARI 설정을 위한 정보 필드를 정의할 수도 있고, 혹은 기존의 정보 영역을 해당 ARI(ACK/NACK Resource Indication)을 위한 용도로 활용하도록 할 수 있다. 예를 들어 기존의 2비트 ‘TPC command for PUCCH’ 정보 영역을 ARI 용도로 활용하도록 할 수 있다. In the case of a UE set to receive DCI through EPDCCH, an ARI (ACK / NACK Resource Indicator) information area having a size of M bits (bit (s)) for the corresponding UE is defined in the downlink scheduling information, 2 (corresponding to n < = 2 ^M ) corresponding to each ARI value

And may be applied to the UE according to the ARI value in the corresponding downlink scheduling information. For this purpose, an information field for new ARI setting may be defined in the DCI formats (i.e., DCI formats 1A, 2A, 2B, 2C, etc.) for the downlink scheduling information, NACK Resource Indication). For example, the conventional 2-bit TPC command for PUCCH information area can be utilized as an ARI application.

값을 다이나믹 옵셋 지시 값으로 정의할 수 있는데,

값이 상위 계층 시그널링을 통해 준정적(semi-static)으로 결정되는 값인데 비해

값은 단말로 전송되는 제어정보를 통해 지시할 수 있다는 의미에서 다이나믹 옵셋 지시 값으로 부를 수 있다.

The value can be defined as a dynamic offset indication value,

Value is determined to be semi-static through upper layer signaling

Value may be referred to as a dynamic offset indication value in the sense that it can be indicated through the control information transmitted to the terminal.

In the present invention, the description is based on the size of the corresponding ARI, M = 2, but it is obvious that the same concept can be applied to other M values.

을 결정하는 방안으로서 본 발명에서는 아래의 3가지 방안을 제안한다.The above n explicit explicitly determined offset parameters (four in the example of Table 1)

The following three methods are proposed in the present invention.

을 결정하는 방안으로서 EPDCCH를 통해 DCI를 수신하도록 설정된 임의의 단말을 위한 단말-특정 상위 계층 시그널링(UE-specific higher layer signaling)을 통해

… ,

까지 n개의 명시적 결정 파라미터를 단말-특정으로 설정할 수 있다. 예를 들어 2비트 ARI가 적용되는 경우, 아래의 표 3 혹은 표 4와 같이 각각 4개 혹은 디폴트 옵셋 값인 0을 제외한 3개의 옵셋 값이 단말-특정 상위 계층 시그널링을 통해 각각의 단말 별로 설정되어, ARI에 따라 단말 별로 서로 다른

이 적용될 수 있다.
First, through the downlink scheduling information of the UE

Specific higher layer signaling for any UE that is configured to receive the DCI over the EPDCCH,

... ,

RTI ID = 0.0 &gt; n &lt; / RTI &gt; For example, when 2-bit ARI is applied, three offset values except for four or zero, which is a default offset value, are set for each UE through UE-specific upper layer signaling as shown in Table 3 or Table 4 below, According to the ARI,

Can be applied.

을 결정하는 다른 방안으로서, ARI에 따른 옵셋 값을 고정하여, 모든 단말에게 동일한 값을 적용하도록 할 수 있다. 이 경우, EPDCCH를 통해 DCI를 수신하는 단말과 레거시 PDCCH를 통해 DCI를 수신하는 단말 간의 충돌(collision)을 최소화하면서 PUCCH 자원을 효율적으로 할당하기 위한 방안으로서 링크 적응(link adaptation)을 위해 적용되는 집합 레벨(aggregation level)을 제외한 나머지 값인 (3,5,6,7)을 해당 ARI에 따른 옵셋 값으로 사용할 수 있다. 즉, 아래의 표 5와 같이 3,5,6,7을 ARI에 따른 옵셋 값으로 적용하거나 혹은, 아래의 표 6과 같이 디폴트 옵셋 값을 제외한 3개의 옵셋 값을 사용되지 않는 집합 레벨(aggregation level) 3,5,6,7 중, 짝수인 6을 제외한 나머지 (3,5,7)을 각각 적용하도록 할 수 있다.
Through the downlink scheduling information of the UE

As another method for determining the offset value, it is possible to fix the offset value according to the ARI and apply the same value to all terminals. In this case, as a method for efficiently allocating the PUCCH resources while minimizing the collision between the terminal receiving the DCI through the EPDCCH and the terminal receiving the DCI through the legacy PDCCH, a set applied for link adaptation The remaining values (3, 5, 6, 7) excluding the level (aggregation level) can be used as an offset value according to the corresponding ARI. That is, as shown in Table 5 below, 3, 5, 6 and 7 are applied as offset values according to ARI, or 3 offset values excluding the default offset value are used as aggregation level ) 3, 5, 6 and 7, and the remaining 6 (3, 5, 7), respectively.

값으로서의 (3,5,6,7)은 하나의 일 예이며, 이러한

의 다른 예로서 아래의 표가 적용될 수도 있다.Described above

The values (3, 5, 6, 7) as values are one example,

As another example of this, the following table may be applied.

는

와 같은 값이다.Here, the ACK / NACK Resource offset field corresponds to the ARI field described above,

The

Lt; / RTI &gt;

을 결정하는 또 다른 방안으로서, ARI에 따른 옵셋 값을 고정하되, 해당 하향링크 스케줄링 정보가 전송된 EPDCCH의 집합 레벨에 따라 ARI에 따른 옵셋 매핑 테이블을 달리 가져갈 수 있다. 즉, 집합 레벨 1을 위한 ARI -

매핑 테이블, 집합 레벨 2를 위한 ARI -

매핑 테이블, 집합 레벨 4를 위한 ARI -

매핑 테이블 및 집합 레벨 8을 위한 ARI -

매핑 테이블을 각각 정의하여, 해당 하향링크 스케줄링 정보를 위한 EPDCCH의 집합 레벨 및 해당 하향링크 스케줄링 정보의 ARI에 따라 결정되는

값을 적용하도록 할 수 있다. 예를 들어, 아래의 표 8 내지 11을 통해 각각의 집합 레벨 별 ARI -

매핑 테이블이 각각 정의될 수 있다.Through the downlink scheduling information of the UE

The offset value according to the ARI can be fixed and the offset mapping table according to the ARI can be taken differently according to the aggregate level of the EPDCCH to which the downlink scheduling information is transmitted. That is, ARI -

Mapping table, ARI for set level 2 -

Mapping table, ARI for set level 4 -

Mapping table and ARI for set level 8 -

Mapping table, and is determined according to the aggregate level of the EPDCCH for the downlink scheduling information and the ARI of the corresponding downlink scheduling information

Value can be applied. For example, through the following Tables 8 to 11, the ARI-

A mapping table can be respectively defined.

In addition, all cases in which the PUCCH ACK / NACK resources are mapped as a sum of some of the four parameters of the equations (5) to (8) proposed by the present invention and the corresponding parameters are configured in the form of combinations of the above- It is obvious that the invention can be included in the scope of the invention.

10 is a flowchart illustrating a process of downlink transmission of a transmission / reception point and uplink transmission of a UE according to the above-described embodiments.

Referring to FIG. 10, the eNB 110 performs downlink transmission (S1010) as a transmission / reception point. However, before the downlink transmission (S1010) is performed, the eNB 110 sets And may transmit information on the parameters to the terminal 120.

실시예에 따른 명시적 결정 파라미터

에 대한 정보를 단말(120)로 전송할 수 있고, 또는 전술한

실시예에 따른 명시적 결정 옵셋 추가 파라미터

과 관련된 정보를 단말(120)로 전송할 수도 있다.For example, the eNB 110 may send the upper layer signaling

The explicit decision parameters &lt; RTI ID = 0.0 &gt;

To the terminal 120, or to the terminal 120,

The explicit decision offset additional parameter

To the terminal 120. [0050] FIG.

,

,

,

)과 관련하여 상위 계층 시그널링을 통해 단말(120)로 전송하는 설정 파라미터 정보들이 S1010 단계 이전에 이루어질 수 있다.In addition, the above-described parameters (

,

,

,

The configuration parameter information to be transmitted to the terminal 120 through the upper layer signaling may be performed before the step S1010.

In step S1010, the eNB 110 transmits control information including downlink scheduling information and a PDSCH indicated by the downlink scheduling information through an EPDCCH of a data area of a physical resource block pair of a subframe, 120 in step S1010.

At this time, in order to transmit the control information including the downlink scheduling information through the EPDCCH of the data area of the physical resource block pair of the specific subframe, the eNB 110 allocates X subframes of a specific subframe, for example, 2 At least one centralized EPDCCH set consisting of a pair of physical resource blocks is allocated. At this time, the EPDCCH set can allocate n centralized EPDCCH sets and m distributed type EPDCCH sets, but it is illustrated that one centralized EPDCCH set is allocated for the simplification of description.

Then, the eNB 110 indexes at least two control channel elements (enhanced control channel elements) for each set. For example, it is possible to index ECCEs constituting a centralized EPDCCH set separately for at least one centralized EPDCCH set consisting of two physical resource block pairs. When a set of n centralized EPDCCHs and a set of m distributed EPDCCHs are allocated, the ECCEs can be indexed by EPDCCH set.

Assign control information to at least one of the indexed control channel elements and transmit the control information to a specific terminal. At this time, if the control information includes downlink scheduling information, the PDSCH indicated by the downlink scheduling information is also downlinked to the UE 120 in step S1010.

In step S1010, the UE 120 receives control information including downlink scheduling information and a PDSCH indicated by the downlink scheduling information from the eNB 110 through the EPDCCH in step S1010.

실시예에서 설명한 바와 같이 상위 계층 시그널링을 통해 전달받은

테이블 정보(예, 표 3 내지 4) 혹은 고정된 옵셋 값 테이블 정보(표 5 내지 10)에 대해 ARI 정보 필드를 통해 단말(120)은 다이나믹 옵셋 값을 확인할 수 있다.An ACK / NACK Resource Indicator (ARI) information field is defined in the downlink scheduling information, and the UE 120 can receive the dynamic offset indication information through this field.

As described in the embodiment,

The terminal 120 can confirm the dynamic offset value through the ARI information field for the table information (e.g., Tables 3 to 4) or the fixed offset value table information (Tables 5 to 10).

Next, the UE 120 may transmit a scheduling request (SR), a HARQ (Hybrid ARQ) -ACK for the received DL data channel transmission block, and a report of the UE related to the DL channel status through the PUCCH , Uplink data is transmitted in an uplink through the PUSCH (S1020). At this time, the terminal 120 may perform uplink transmission to the eNB 110 as a first transmission / reception point, as shown in FIG. Meanwhile, the second terminal 122 may perform the uplink transmission to the RRH 112, which is the second transmission / reception point.

At this time, how the control information according to each PUCCH format is mapped to a resource block (RB) is as described above with reference to FIG.

(수학식 3과 4의

에 대응) 명시적 결정 파라미터(explicitly determined parameter),

(수학식 3과 4의

에 대응), 묵시적 결정 옵셋 추가 파라미터(implicitly determined offset)

및 명시적 결정 옵셋 추가 파라미터(explicitly determined offset)

을 포함할 수 있다. 전술한 예와 같이 해당 PDSCH 수신에 대한 HARQ ACK/NACK 피드백을 위한 해당 안테나 포트별 PUCCH 자원 매핑은 각각 수학식 5 내지 8에 의해 결정될 수도 있다.
In step S1020, the UE 120 receives HARQ ACK / NACK feedback for the corresponding PDSCH reception of the UE to which the PDSCH allocation information for the UE is transmitted through the downlink scheduling information on the EPDCCH allocated to the data block of the resource block An implicitly determined parameter determined by the ECCE as a PUCCH resource determination factor in the PUCCH resource mapping for the corresponding antenna port,

(Equations 3 and 4

, An explicitly determined parameter,

(Equations 3 and 4

, An implicitly determined offset,

And an explicitly determined offset.

. &Lt; / RTI &gt; The PUCCH resource mappings for the respective antenna ports for HARQ ACK / NACK feedback for the corresponding PDSCH reception may be determined by Equations 5 to 8, respectively.

11 is a diagram illustrating a configuration of a base station 1100 according to another embodiment of the present invention.

11, the base station 1100 includes a control unit 1110, a transmission unit 1120, and a reception unit 1130 as transmission / reception points for transmitting control information for a terminal through a data area of a pair of resource blocks of a subframe .

The controller 1110 controls the overall operation of the base station 1100 according to the PUCCH resource setting for uplink HARQ ACK / NACK feedback for the UE set to receive the DCI through the EPDCCH necessary for performing the above-described present invention.

The transmitting unit 1120 and the receiving unit 1130 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

실시예,

실시예,

실시예 및

실시예를 통해 설명한 본 발명의 실시예에서의 기지국의 기능을 모두 수행할 수 있다.The base station 1100 described with reference to FIG. 11 is connected to the control unit 1110, the transmitting unit 1120, and the receiving unit 1130

Examples,

Examples,

Examples and

It is possible to perform all the functions of the base station in the embodiment of the present invention described in the embodiment.

실시예를 수행하는 것에 대해 좀더 설명한다.As an example of a base station 1100 performing one of the embodiments of the present invention

Performing the embodiment will be described in more detail.

The control unit 1110 may allocate at least one enhanced physical downlink control channel set consisting of X resource blocks (X is at least 1 and a natural number equal to or less than the number of PRBs in all bands) of the subframe (Where X may be one of 2, 4, 8, or 16).

The transmitting unit 1120 may transmit uplink control channel resource starting offset indication information to each of the at least one downlink control channel set (EPDCCH set).

실시예를 통해 설명한

에 대한 정보이다.This uplink control channel resource starting offset indication information is expressed by Equations 5 to 8, 8 to 10,

As described in the examples

&Lt; / RTI &gt;

The transmitter 1120 may transmit the uplink control channel resource starting offset indication information through higher layer signaling (e.g., RRC).

The transmission unit 1120 transmits control information to the UE through a data area of a pair of resource blocks of a subframe. The control information may include downlink scheduling information, and the control information may be transmitted from the control unit 1110 Is transmitted through at least one enhanced control channel element (ECCE) of one of the at least one downlink control channel set (EPDCCH set) mentioned above.

The minimum index of the control channel element to which the uplink control channel resource starting offset indication information and the control information transmitted by the transmitter 1120 are transmitted is calculated by using an ACK / NACK (Physical Downlink Shared Channel) for the PDSCH allocated according to the downlink scheduling information, Can be used as a resource decision element in uplink control channel resource mapping.

The downlink scheduling information transmitted by the transmitter 1120 may include dynamic offset indication information.

실시예를 통해 설명한

에 대한 정보이다.This dynamic offset indication information is expressed by Equations (7) to (8), (10) and

As described in the examples

&Lt; / RTI &gt;

The transmitter 1120 may define the ARI field in the downlink scheduling information and transmit the dynamic offset indication information through this field. The transmitted dynamic offset indication information can be used as another resource decision element when mapping an ACK / NACK uplink control channel resource to a physical downlink shared channel (PDSCH) allocated according to downlink scheduling information.

12 is a diagram illustrating a configuration of a user terminal according to another embodiment of the present invention.

12, the user terminal 1200 according to another embodiment includes a receiving unit 1210, a control unit 1220, and a transmitting unit 1230.

The receiver 1210 receives downlink control information, data, and messages from the base station through the corresponding channel.

Also, the controller 1220 controls the overall operation of the base station according to the PUCCH resource mapping for the uplink HARQ ACK / NACK feedback for the UE set to receive the DCI through the EPDCCH necessary for performing the above-described present invention.

The transmitter 1230 transmits downlink control information, data, and a message to the base station through the corresponding channel.

실시예,

실시예,

실시예 및

실시예를 통해 설명한 본 발명의 실시예에서의 단말의 기능을 모두 수행할 수 있다.The terminal 1200 described with reference to FIG. 12 is connected to a receiving unit 1210, a control unit 1220, and a transmitting unit 1230

Examples,

Examples,

Examples and

It is possible to perform all functions of the terminal in the embodiment of the present invention described in the embodiment.

실시예를 수행하는 것에 대해 좀더 설명한다.As an example of terminal 1200 performing one of the embodiments of the present invention

Performing the embodiment will be described in more detail.

For each set of at least one enhanced physical downlink control channel configured with X resource blocks (X is a natural number equal to or greater than 1 and equal to or less than the number of PRBs in all bands) of a subframe, Receiving control channel resource starting offset indication information from a transmission / reception point and transmitting at least one enhanced control channel element (ECCE) of one of the at least one downlink control channel set (EPDCCH set) Lt; RTI ID = 0.0 &gt; downlink &lt; / RTI &gt; scheduling control information.

X = 2, 4, 8, (16), and (32) in X resource block pairs constituting one EPDCCH set. At this time, depending on the type of the EPDCCH set, the EPDCCH set may or may not comprise up to 16 resource block pairs. For example, a distributed EPDCCH set can be composed of 16 resource block pairs, but a centralized EPDCCH set can be composed of a maximum of 8 resource block pairs.

실시예를 통해 설명한

에 대한 정보이다.This uplink control channel resource starting offset indication information is expressed by Equations 5 to 8, 8 to 10,

As described in the examples

&Lt; / RTI &gt;

The receiver 1210 may receive the uplink control channel resource starting offset indication information through higher layer signaling (e.g., RRC).

The controller 1220 controls the uplink control channel resource mapping of the ACK / NACK for the allocated physical downlink shared channel (PDSCH) according to the downlink scheduling control information. The controller 1220 controls uplink control channel resource mapping It is possible to map the uplink control channel resource using the minimum index of the control channel element in which the channel resource starting offset indication information and the control information are received as the resource determination element.

The downlink scheduling control information may include dynamic offset indication information, and the controller 1220 may map the uplink control channel resource using the dynamic offset indication information as another resource determining element.

실시예를 통해 설명한

에 대한 정보이다.
This dynamic offset indication information is expressed by Equations (7) to (8), (10) and

As described in the examples

&Lt; / RTI &gt;

The contents related to the standard specification mentioned in the above-mentioned embodiments are omitted for the sake of brevity and constitute a part of this specification. Therefore, it is to be understood that the content of some of the contents related to the above standard is added to or included in the scope of the present invention.

The following documents specifically attached form part of this specification as part of the already published documents. Therefore, it is to be understood that the content of the above standard content and portions of the standard documents are added to or contained in the scope of the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (22)

A method for establishing an uplink control channel resource of a transmission / reception point for transmitting control information for a terminal through a data area of a resource block pair of a subframe,
Allocating at least one enhanced physical downlink control channel set having X resource blocks (X is a natural number equal to or greater than 1 and equal to or less than the number of PRBs in all bands) of the subframe; And
And transmitting uplink control channel resource starting offset indication information configured for the at least one downlink control channel set to the UE,
Wherein the set of downlink control channels comprises at least one set of distributed downlink control channels and at least one set of centralized downlink control channels,
The uplink control channel resource mapping of the ACK / NACK for the PDSCH allocated according to the downlink scheduling information included in the control information includes uplink control channel resource starting offset indication information, The minimum index of the at least one control channel element and the dynamic offset indication information.
The method according to claim 1,
Wherein the control information is transmitted through at least one enhanced control channel element (ECCE) of one of the set of downlink control channels of the at least one downlink control channel set. How to set channel resources.
The method according to claim 1,
Wherein the downlink scheduling information includes the dynamic offset indication information,
Wherein the dynamic offset indication information is set to correspond to each of ARI (ACK / NACK Resource Indicator) information having a specific bit size.
The method according to claim 1,
Wherein the transmission antenna port information of the downlink scheduling information is used as another resource determining element when mapping the uplink control channel resource of the ACK / NACK for the PDSCH allocated according to the downlink scheduling information. And transmitting the uplink control channel resource to the base station.
delete A method of mapping an uplink control channel resource of a terminal receiving control information through a data area of a resource block pair of a subframe,
And an uplink control channel resource starting offset (SFN) configured for each set of at least one enhanced physical downlink control channel (SFN) having X resource blocks (X is at least 1 and a natural number equal to or less than the number of PRBs in all bands) Receiving instruction information from a transmission / reception point;
Receiving downlink scheduling control information from at least one transmission / reception point through at least one enhanced control channel element (ECCE) of one of the at least one downlink control channel set; And
When mapping an ACK / NACK uplink control channel resource to a PDSCH allocated according to the downlink scheduling control information, the uplink control channel resource starting offset indication information, the minimum index of the control channel element, And using the offset indication information as a resource decision element,
Wherein the set of downlink control channels includes at least one set of distributed downlink control channels and at least one set of centralized downlink control channels,
Wherein the dynamic offset indication information is included in the downlink scheduling information and corresponds to each of ARI (ACK / NACK Resource Indicator) information having a specific bit size.
delete delete The method according to claim 6,
And mapping the uplink control channel resource using the transmit antenna port information of the downlink scheduling control information as another resource decision element.
delete delete delete delete delete delete delete delete delete delete delete delete delete

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