KR102412484B1 - Apparatus and method for dynamic resource allocation for uplink control channel - Google Patents

Abstract

The present invention relates to a method and apparatus for dynamically allocating resources for an uplink control channel in a wireless communication system. A method for a terminal of a wireless communication system to transmit uplink control information, comprising: receiving, from a base station, first information indicating a first resource region that can be used by a physical uplink control channel (PUCCH); receiving, from the base station, second information used for determining a second resource region to which the PUCCH is allocated; and mapping the uplink control information to the second resource region determined based on the first information and the second information and transmitting the uplink control information to the base station. Here, the second resource region may be included in the first resource region, the first information may be set by a higher layer, and the second information may be dynamically indicated through downlink control information (DCI).

Description

Apparatus and method for dynamically allocating resources of an uplink control channel {APPARATUS AND METHOD FOR DYNAMIC RESOURCE ALLOCATION FOR UPLINK CONTROL CHANNEL}

The present invention relates to a wireless communication system, and more particularly, to a method, apparatus, software, or a recording medium storing software for dynamically allocating resources for an uplink control channel in a wireless communication system.

In a wireless communication system, Hybrid Automatic Retransmission Request (HARQ)-Acknowledgment information, that is, HARQ-ACK information indicating whether the receiving end has successfully decoded the data transmitted from the transmitting end, is transmitted to the receiving end. It may be transmitted or fed back from the transmitter to the transmitter. For example, an error detection code (eg, cyclic redundancy check (CRC)) may be added to downlink data transmitted from the base station to the terminal in units of codewords, and accordingly, in the terminal, in units of codewords Positive acknowledgment (ACK)/negative acknowledgment (NACK) information may be generated and transmitted to the base station through an uplink channel. Similar to transmission of uplink acknowledgment information in response to such downlink data transmission, an acknowledgment for uplink data transmitted from the terminal to the base station may be transmitted from the base station to the terminal through a downlink channel.

In a wireless communication system to which Multi-Input Multi-Output (MIMO) technology is applied, as information fed back from a receiving end to a transmitting end, a Rank Indicator (RI), a Precoding Matrix Index (PMI) ), channel quality information (CQI), and the like are defined. The feedback information may be collectively referred to as channel state information (CSI). For example, the terminal may feed back the RI and/or PMI preferred by the terminal to the base station based on the measurement result of the downlink channel from the base station. Here, the RI preferred by the UE corresponds to a downlink transmission rank value that can have the highest data rate if used by the base station in a given channel state. In addition, the PMI preferred by the terminal is an index indicating a precoding matrix suitable for a channel state measured by the terminal in a codebook that is a set of precoding matrix candidates, and the codebook may be predetermined and shared between the base station and the terminal. In addition, the CQI is calculated based on the RI and/or PMI reported by the UE, and may correspond to a modulation and coding scheme (MCS) level applied to downlink transmission. That is, the CQI may indicate an MCS level that provides an acceptable packet error rate when a predetermined rank value and precoder information are applied. The reporting time of the CSI of the UE and the frequency range (or frequency resolution) to be measured may be controlled by the base station. Regarding the reporting time, periodic (periodic) CSI reporting and aperiodic (aperiodic) CSI reporting may be supported. In general, periodic CSI reporting may be performed through a physical uplink control channel (PUCCH), and aperiodic CSI reporting may be performed through a physical uplink control channel (PUSCH).

In a traditional wireless communication system (eg, a system according to 3GPP LTE Release 8 or 9), one frequency band is used, but in an advanced wireless communication system (eg, 3GPP LTE Release 10, 11 or 12), A plurality of frequency bands may be bundled using carrier aggregation (CA) to achieve the same effect as using a logically large frequency band. For example, contiguous or non-contiguous two bands (ie, two component carriers having different carrier frequencies) in the frequency domain are merged, resulting in a higher transmission rate (rate) can be supported. In CA, a cell may consist of a downlink resource (ie, a downlink configuration carrier (DL CC)) and/or an uplink resource (ie, an uplink configuration carrier (UL CC)). Here, the UL CC is not an essential element, and one cell may correspond to only the DL CC or both the DL CC and the UL CC. The DL CC and the UL CC may be expressed as a carrier frequency, and the carrier frequency means a center frequency in a corresponding cell. A cell may be classified into a primary cell (PCell) operating at a primary frequency and a secondary cell (SCell) operating at a secondary frequency. PCell and SCell may be collectively referred to as a serving cell. The PCell is one serving cell that provides a security input and Non-Access Stratum (NAS) mobility information in a Radio Resource Control (RRC) connection (establishment) or re-establishment state. means According to the capability of the UE, one or more SCells may be configured to form a set of serving cells in addition to the PCell. That is, the set of serving cells configured for one UE may include only one PCell or may include one PCell and one or more SCells.

Conventional carrier aggregation defines that up to 5 CCs are merged, but recently, CA technology enhancement of merging more than 5 (eg, up to 32) CCs is being discussed. In order to support such improved CA (eCA), the introduction of a new PUCCH format having a larger capacity than the conventional PUCCH format is being discussed.

In addition, in the conventional CA, uplink control information (UCI) through PUCCH (here, UCI collectively refers to HARQ-ACK, CSI, scheduling request (SR), etc.) can be transmitted only in the primary cell (PCell). However, in eCA, support for PUCCH transmission in a secondary cell (SCell) is also being discussed.

Accordingly, a specific resource allocation method for transmitting an uplink control channel when a new PUCCH format is configured for a UE is required.

The present invention provides a method and apparatus for dynamically allocating resources for an uplink control channel.

The present invention provides a method and apparatus for allocating a resource region usable by an uplink control channel and indicating a resource region used by an uplink control channel among them.

The present invention provides a method and apparatus for semi-statically allocating a resource region usable by an uplink control channel, and dynamically allocating a resource region used by an uplink control channel among them.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

According to an aspect of the present invention, in a method for a terminal to transmit uplink control information in a wireless communication system, first information indicating a first resource region that can be used by a physical uplink control channel (PUCCH) is received from a base station. to do; receiving, from the base station, second information used for determining a second resource region to which the PUCCH is allocated; and mapping the uplink control information to the second resource region determined based on the first information and the second information and transmitting the uplink control information to the base station. Here, the second resource region may be included in the first resource region, the first information may be set by a higher layer, and the second information may be dynamically indicated through downlink control information (DCI).

In addition, the second resource region may correspond to a plurality of PRB pairs in one subframe.

, 또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 의해서 결정될 수 있다. 상기

는 PUCCH 포맷 2, 2a, 2b 또는 3에 의해서 사용될 수 있는 자원블록(RB) 개수를 나타내고, 상기 N ⁽⁴⁾ _PUCCH,RB 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB 개수를 나타내고, 상기 N ⁽⁴⁾ _RB,START 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB의 시작점을 나타낼 수 있다. In addition, the first resource area is

, or may be determined by N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START . remind

denotes the number of resource blocks (RBs) that can be used by PUCCH format 2, 2a, 2b or 3, the N ⁽⁴⁾ _PUCCH,RB denotes the number of RBs that can be used by PUCCH format 4, and the N ⁽⁴ ) ⁾ _RB,START may indicate a starting point of an RB that can be used by PUCCH format 4.

In addition, the information indicating the second resource region may include one or more of an RIV, a PUCCH format indicator, and a resource allocation direction indicator. RB _START and L _CRBs may be derived from the RIV, the RB _START may indicate a starting point of the second resource region, and the L _CRBS may indicate the number of consecutive RBs of the second resource region.

In addition, the information indicating the second resource region may include one or more of N _CRBs , n ⁽⁴⁾ _{PUCCH, RBmax} , a PUCCH format indicator, and a resource allocation direction indicator. The n ⁽⁴⁾ _PUCCH,RBmax may indicate the maximum number of RBs that can be allocated to the second resource region, and the N _CRBs may indicate the number of consecutive RBs of the second resource region.

The number of consecutive RBs in the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI.

The resource allocation direction indicator of the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI.

The information indicating the second resource region may be signaled by a transmit power control (TPC) command field of the DCI.

The features briefly summarized above with respect to the invention are merely exemplary aspects of the detailed description of the invention that follows, and do not limit the scope of the invention.

According to the present invention, a new method of dynamically instructing resource allocation for a new PUCCH format and dynamically deriving allocated resources based on the indication can be provided.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are intended to provide an understanding of the present invention, and represent various embodiments of the present invention, and together with the description of the specification, serve to explain the principles of the present invention.
1 is a diagram showing the configuration of a wireless device according to the present invention.
2 and 3 are diagrams for explaining the structure of a radio frame of the 3GPP LTE system.
4 is a diagram illustrating the structure of a downlink subframe.
5 is a diagram illustrating the structure of an uplink subframe.
6 is a diagram for explaining the structure of PUCCH format 3;
7 and 8 are diagrams for explaining an exemplary structure of PUCCH format 4;
9 is a diagram for explaining an example of PUCCH format 4 resource allocation according to the present invention.
10 is a diagram for explaining a method for determining a slot to which a PF4 resource is allocated.
11 and 12 are diagrams for explaining additional examples of PUCCH format 4 resource allocation according to the present invention.
13 to 15 are diagrams for explaining additional examples of PUCCH format 4 resource allocation according to the present invention.
16 is a diagram for explaining a method according to an exemplary embodiment of the present invention.
17 is a diagram for explaining the configuration of a processor according to the present invention.

Hereinafter, content related to the present invention will be described in detail with reference to exemplary drawings and embodiments. In adding reference numerals to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the embodiments of the present specification, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present specification, the detailed description thereof will be omitted.

In addition, this specification describes a wireless communication network, and an operation performed in the wireless communication network is performed in the process of controlling the network and transmitting or receiving a signal in a system (eg, a base station) having jurisdiction over the wireless communication network, or This can be done in the process of transmitting or receiving a signal from a terminal coupled to the corresponding wireless network.

That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including the base station may be performed by the base station or other network nodes other than the base station. A 'base station (BS: Base Station)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), and an access point (AP). In addition, 'terminal' may be replaced by terms such as User Equipment (UE), Mobile Station (MS), Mobile Subscriber Station (MSS), Subscriber Station (SS), and non-AP station. can

Terms used to describe embodiments of the present invention may be described by 3GPP LTE/LTE-A (LTE-Advanced) standard documents, except when specified to be used in a different meaning. However, it should be noted that this is only for economical efficiency and clarity of explanation, and embodiments of the present invention are not limited to being applied only to a system conforming to 3GPP LTE/LTE-A or a subsequent standard.

Hereinafter, a wireless device according to the present invention will be described.

1 is a diagram showing the configuration of a wireless device according to the present invention.

1 illustrates a terminal device 100 corresponding to an example of a downlink reception device or an uplink transmission device, and a base station device 200 corresponding to an example of a downlink transmission device or an uplink reception device.

The terminal device 100 may include a processor 110 , an antenna unit 120 , a transceiver 130 , and a memory 140 .

The processor 110 performs baseband-related signal processing and may include an upper layer processing unit 111 and a physical layer processing unit 112 . The upper layer processing unit 111 may process an operation of a medium access control (MAC) layer, a radio resource control (RRC) layer, or a higher layer. The physical layer processing unit 112 may process operations of the physical (PHY) layer (eg, uplink transmission signal processing, downlink reception signal processing). The processor 110 may control the overall operation of the terminal device 100 in addition to performing baseband-related signal processing.

The antenna unit 120 may include one or more physical antennas, and when it includes a plurality of antennas, it may support MIMO transmission/reception. The transceiver 130 may include a radio frequency (RF) transmitter and an RF receiver. The memory 140 may store information processed by the processor 110 , software related to the operation of the terminal device 100 , an operating system, an application, and the like, and may include components such as a buffer.

The base station apparatus 200 may include a processor 210 , an antenna unit 220 , a transceiver 230 , and a memory 240 .

The processor 210 performs baseband-related signal processing and may include an upper layer processing unit 211 and a physical layer processing unit 212 . The higher layer processing unit 211 may process an operation of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 212 may process PHY layer operations (eg, downlink transmission signal processing, uplink reception signal processing). The processor 210 may control the overall operation of the base station apparatus 200 in addition to performing baseband-related signal processing.

The antenna unit 220 may include one or more physical antennas, and when it includes a plurality of antennas, it may support MIMO transmission/reception. The transceiver 230 may include an RF transmitter and an RF receiver. The memory 240 may store information processed by the processor 210 , software related to the operation of the base station apparatus 200 , an operating system, an application, and the like, and may include components such as a buffer.

Hereinafter, the radio frame structure will be described.

2 and 3 are diagrams for explaining the structure of a radio frame of the 3GPP LTE system.

In a cellular orthogonal frequency division multiplexing (OFDM) wireless packet communication system, uplink or downlink transmission is performed in units of subframes. One subframe is defined as a predetermined time interval including a plurality of OFDM symbols. The 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).

2 is a diagram illustrating the structure of a type 1 radio frame. One radio frame consists of 10 subframes, and one subframe consists of two slots in a time domain. A time taken for one subframe to be transmitted is referred to as a transmission time interval (TTI). For example, the length of one subframe is 1 ms, and the length of one slot is 0.5 ms. One slot may include a plurality of OFDM symbols in the time domain. An OFDM symbol may also be referred to as a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol or symbol interval. The number of OFDM symbols included in one slot may vary according to a CP (Cyclic Prefix) setting. The CP includes an extended CP (CP) and a normal CP (normal CP). For example, in the case of a normal CP, the number of OFDM symbols included in one slot may be seven. In the case of the extended CP, since the length of one OFDM symbol is increased, the number of OFDM symbols included in one slot may be less than 6 in the case of the normal CP. When the channel state is unstable, such as when the size of the cell is large or the terminal moves at a high speed, the extended CP can be used to further reduce inter-symbol interference.

In FIG. 2 , in the resource grid, OFDM symbols of a normal CP are assumed, and one slot corresponds to 7 OFDM symbols in the time domain. In the frequency domain, the system bandwidth is defined as an integer (N) times a resource block (RB), and the downlink system bandwidth may be indicated by parameters N ^DL and N ^UL for the uplink system bandwidth. A resource block is a resource allocation unit, and may correspond to a plurality of (eg, 7) OFDM symbols corresponding to one slot in the time domain and a plurality of (eg, 12) consecutive subcarriers in the frequency domain. . Each element on the resource grid is called a resource element (RE). One resource block includes 12×7 resource elements. The resource grid of FIG. 2 may be equally applied to an uplink slot and a downlink slot. In addition, the resource grid of FIG. 2 may be equally applied to a slot of a type 1 radio frame and a slot of a type 2 radio frame to be described later.

3 is a diagram illustrating the structure of a type 2 radio frame. A type 2 radio frame consists of two half frames, and each half frame includes five subframes, a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS). can be composed of Like the type 1 radio frame, one subframe consists of two slots. DwPTS is used for initial cell search, synchronization, or channel estimation in the UE in addition to data transmission/reception. UpPTS is used to synchronize the channel estimation in the base station with the uplink transmission synchronization of the terminal. The guard period (GP) is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink. DwPTS, GP, and UpPTS may be referred to as special subframes.

4 is a diagram illustrating the structure of a downlink subframe. A plurality of (eg, three) OFDM symbols in the front part of the first slot in one subframe correspond to a control region to which a control channel is allocated. The remaining OFDM symbols correspond to a data region to which a Physical Downlink Shared Channel (PDSCH) is allocated. The downlink control channels used in the 3GPP LTE system include a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), and a Physical HARQ indicator channel (Physical Hybrid automatic). repeat request indicator channel (PHICH), etc. Additionally, an Enhanced Physical Downlink Control Channel (EPDCCH) in the data region may also be transmitted to terminals configured by the base station.

The PCFICH is transmitted in the first OFDM symbol of a subframe and includes information on the number of OFDM symbols used for control channel transmission in the subframe.

The PHICH includes HARQ-ACK information as a response to uplink transmission.

(E) Control information transmitted through the PDCCH is referred to as Downlink Control Information (DCI). DCI includes uplink or downlink scheduling information or other control information according to various purposes, such as an uplink transmission power control command for an arbitrary terminal group. The base station determines the (E)PDCCH format according to the DCI transmitted to the terminal, and adds a CRC (Cyclic Redundancy Check) to the control information. The CRC is masked with an identifier called a Radio Network Temporary Identifier (RNTI) according to the owner or use of the (E)PDCCH. (E) If the PDCCH is for a specific terminal, the cell-RNTI (C-RNTI) identifier of the terminal may be masked to the CRC. Alternatively, if the PDCCH is for a paging message, a Paging Indicator Identifier (P-RNTI) may be masked to the CRC. If the PDCCH is for a system information block (SIB), a system information identifier and a system information RNTI (SI-RNTI) may be masked to the CRC. In order to indicate a random access response that is a response to the UE's transmission of the random access preamble, a random access-RNTI (RA-RNTI) may be masked to the CRC.

5 is a diagram illustrating the structure of an uplink subframe. The uplink subframe may be divided into a control region and a data region in the frequency domain. A Physical Uplink Control Channel (PUCCH) including uplink control information is allocated to the control region. A physical uplink shared channel (PUSCH) including user data is allocated to the data area. PUCCH for one UE is allocated to a resource block pair (RB pair) in a subframe. Resource blocks belonging to the resource block pair occupy different subcarriers for 2 slots. In this case, the resource block pair allocated to the PUCCH is said to be frequency-hopped at the slot boundary.

Hereinafter, a physical uplink control channel (PUCCH) will be described.

The amount of uplink control information (UCI) that the UE can transmit in one subframe is the number of SC-FDMA symbols available for transmission of control information (that is, a reference signal (RS) for coherent detection of PUCCH. ) may be determined according to SC-FDMA symbols excluding the SC-FDMA symbol used for transmission).

In the 3GPP LTE system, PUCCH is defined in a total of 7 different formats depending on the amount of control information, modulation scheme, and control information to be transmitted, and the number of bits transmitted per subframe (M _bit ) according to each PUCCH format is shown in the table below. equal to 1.

PUCCH format 1 is used when there is a scheduling request (SR), that is, when there is a positive SR.

PUCCH format 1a is used for 1-bit HARQ-ACK (ie, HARQ ACK/NACK) or, in case of FDD, is used for positive SR (with positive SR) along with 1-bit HARQ-ACK. PUCCH format 1b is used for 2-bit HARQ-ACK or is used for positive SR along with 2-bit HARQ-ACK. In addition, PUCCH format 1b is used for HARQ-ACK up to 4 bits to which channel selection is applied. This may be applied when more than one serving cell (eg, two serving cells) is configured for the UE, or when one serving cell is configured for the UE in the case of TDD.

PUCCH format 2 is used for CSI reporting that is not multiplexed with HARQ-ACK. In addition, PUCCH format 2 is used for CSI reporting multiplexed with HARQ-ACK for an extended cyclic prefix (CP). PUCCH format 2a is used for CSI reporting multiplexed with 1-bit HARQ-ACK for normal CP. PUCCH format 2b is used for CSI report multiplexed with 2-bit HARQ-ACK for normal CP.

PUCCH format 3 is used for HARQ-ACK up to 10 bits for FDD or HARQ-ACK up to 20 bits for TDD. In addition, PUCCH format 3 is up to 11 bits corresponding to 10-bit HARQ-ACK and 1-bit positive/negative SR for FDD, or up to 21 bits corresponding to 20-bit HARQ-ACK and 1-bit positive/negative SR for TDD. is used for In addition, PUCCH format 3 is used for multiple-bit HARQ-ACK, 1-bit positive/negative SR, and CSI reporting for one serving cell.

6 is a diagram for explaining the structure of PUCCH format 3;

In PUCCH format 3, block spreading is applied to transmission of control information, unlike PUCCH format 1/1a/1b or PUCCH format 2/2a/2b. For example, uplink control information bits (eg, a plurality of HARQ-ACK bits (including SR information bits) and/or CSI bits) may be encoded to form 48 bits. The coded 48 bits may be scrambled using a cell-specific sequence. Among them, 24 bits are transmitted in each of the specific SC-FDMA symbols of the even-numbered slot, and the remaining 24 bits are transmitted in each of the specific SC-FDMA symbols of the odd-numbered slot. 24 bits per each SC-FDMA symbol are modulated with 12 Quadrature Phase Shift Keying (QPSK) symbols, and length on 4 or 5 SC-FDMA symbols depending on the spreading factor (SF) within one slot It can be spread using an orthogonal cover code (OCC) of 4 or 5. PUCCH transmissions by different UEs using different OCCs may be multiplexed within the same PRB pair. In the example of FIG. 6, w(0), w(1), w(2), w(3), and w(4) represent OCC. The spread symbol is transmitted through Discrete Fourier Transform (DFT) precoding in one RB in the frequency domain and 4 or 5 SC-FDMA symbols in the time domain.

In the case of a normal CP, a PUCCH demodulation reference signal (DMRS) is mapped to SC-FDMA symbol indexes 1 and 5 (here, it is assumed that the SC-FDMA symbol index starts from 0) in one slot, and the remaining Control information may be mapped to the SC-FDMA symbol index (ie, SC-FDMA symbol index 0, 2, 3, 4, 6). Here, in the second slot of the two slots in one subframe, the last SC-FDMA symbol is used for SRS transmission and the remaining four SC-FDMA symbols are used for the PUCCH format 3 Short PUCCH format 3 , and this corresponds to a case in which the last SC-FDMA symbol of one subframe is punctured for transmission of a sounding reference signal (SRS). In addition, in the case of an extended CP, PUCCH DMRS is mapped to one SC-FDMA symbol (ie, SC-FDMA symbol index 3) within one slot, and the remaining SC-FDMA symbols (ie, SC-FDMA symbol index 0, 1, 2, 4, 5) may be mapped to control information.

는 OCC를 나타낸다. 여기서, DMRS 심볼에 OCC를 적용한 결과 값은 항상 1이기 때문에, 실제로 ZC 시퀀스에 적용되는 OCC를 통해서 추가적인 다중화가 제공되는 것은 아니다.In the example of FIG. 6 , a DMRS symbol may be generated from a Zadoff-Chu (ZC) sequence to which a specific cyclic shift value is applied, and an OCC of length 2 may be applied over two DMRS symbols in one slot. In the example of Figure 6

represents OCC. Here, since the result of applying OCC to the DMRS symbol is always 1, additional multiplexing is not actually provided through OCC applied to the ZC sequence.

As described with reference to FIG. 5, the PRB pair used for PUCCH format 3 includes one PRB on one frequency edge of the system bandwidth of one slot in one subframe, and the opposite frequency of the other slot. It consists of one PRB of the edge. That is, the PRB pair of the PUCCH format 3 may be frequency hopping (ie, intra-subframe frequency hopping) to the slot boundary. The frequency hopping relationship is defined through pairing of PRBs in each slot, and the PRB-pair through which uplink control information is to be transmitted is determined from the PUCCH format 3 resource index.

When PUCCH format 3 is configured for the UE, one resource set (ie, including a plurality of PUCCH format 3 resources) may be configured by a higher layer (eg, RRC). Which PUCCH format 3 resource in the resource set the UE will use, (E) PDCCH downlink DCI (eg, DCI format 1/1A/1B/1D/2/2A/2B/2C/2D) in PUCCH TPC ( Transmission Power Control) command field (size of 2 bits) or may be explicitly indicated through the HARQ-ACK resource offset field (size of 2 bits) in the EPDCCH downlink DCI. The HARQ-ACK resource offset field exists in the EPDCCH DCI, but does not exist in the PDCCH DCI. 2 bits of the HARQ-ACK resource offset field are, when the EPDCCH DCI is transmitted on the SCell, or when the EPDCCH DCI for scheduling the PDSCH on the SCell is transmitted on the PCell, when PUCCH format 3 is configured for HARQ-ACK feedback for the UE may have a value of 0.

)의 매핑 관계를 나타낸다. Table 2 below shows the TPC field or HARQ-ACK resource offset field and the PUCCH format 3 resource index (

) represents the mapping relationship.

Hereinafter, HARQ-ACK information will be described.

The HARQ-ACK information is control information fed back from the receiving side to the transmitting side according to whether or not decoding of data transmitted from the transmitting side is successful. For example, if the UE succeeds in decoding downlink data, ACK information may be fed back, otherwise, NACK information may be fed back to the base station. Specifically, the case in which HARQ-ACK transmission is required at the data receiving side in the 3GPP LTE system can be roughly divided into the following three types.

The first is a case of transmitting HARQ-ACK for PDSCH transmission indicated by detection of (E) PDCCH. The second is a case of transmitting HARQ-ACK for (E)PDCCH indicating release of Semi-Persistent Scheduling (SPS). The third is a case of transmitting HARQ-ACK for PDSCH transmitted without (E)PDCCH detection, which means HARQ-ACK transmission for SPS. Unless otherwise stated in the following description, the HARQ-ACK transmission scheme is not limited to any one of the above three cases. In addition, in the following description, the above three cases may be collectively referred to as DL transmission requiring HARQ-ACK.

Next, transmission resources of HARQ-ACK information in the FDD scheme and the TDD scheme will be described in detail.

The FDD scheme is a scheme in which a downlink (DL) and an uplink (UL) are separated for each independent frequency band and transmitted/received. Therefore, when the base station transmits the PDSCH to the DL band, the UE may transmit a HARQ-ACK response indicating whether complete DL data is received through the PUCCH on the UL band corresponding to the DL band after a specific time. Accordingly, DL and UL are operated in a one-to-one correspondence.

Specifically, in the example of the 3GPP LTE system, the control information on the downlink data transmission of the base station is transmitted to the terminal through the PDCCH, and the terminal that receives the data scheduled to it through the PDCCH through the PDSCH transmits uplink control information. HARQ-ACK may be transmitted through the PUCCH, which is a channel (or in a piggyback method on PUSCH). In general, the PUCCH for HARQ-ACK transmission is not pre-allocated to each UE, but is configured in such a way that a plurality of UEs in a cell divide and use the plurality of PUCCHs at every time point. Accordingly, as the PUCCH through which the terminal receiving the downlink data at an arbitrary time transmits the HARQ-ACK, the PUCCH corresponding to the PDCCH on which the terminal receives the scheduling information for the corresponding downlink data may be used.

A PUCCH corresponding to the PDCCH (eg, PUCCH format 1/1a/1b) will be described in more detail. A region in which the PDCCH of each downlink subframe is transmitted consists of a plurality of control channel elements (CCEs), and the PDCCH transmitted to one UE in an arbitrary subframe is a CCE constituting the PDCCH region of the subframe. It consists of one or more CCEs. In addition, there are resources capable of transmitting a plurality of PUCCHs in a region in which the PUCCH of each uplink subframe is transmitted. At this time, the terminal determines the PUCCH resource index corresponding to the index of a specific (ie, the first) CCE among CCEs constituting the PDCCH received by the terminal, and transmits the HARQ-ACK using the corresponding PUCCH resource. have.

In a system in which the PUCCH serving cell (PCell or P-SCell, detailed description thereof will be described later) in FDD (ie, frame structure type 1) or FDD-TDD is set to frame structure 1, the UE has a subframe index n-k (for example , k = 4), HARQ-ACK information may be transmitted in subframe index n for the received PDSCH transmission. From the PDCCH indicating PDSCH transmission in subframe n-k, the UE may determine a PUCCH resource index for transmitting HARQ-ACK in subframe n.

Next, HARQ-ACK transmission in the TDD scheme will be described.

In the TDD mode, since downlink transmission and uplink transmission are separated by time, subframes in one radio frame are divided into a downlink subframe and an uplink subframe. Table 3 illustrates UL-DL configuration in TDD mode.

In Table 3, D denotes a downlink subframe, U denotes an uplink subframe, and S denotes a special subframe including DwPTS, GP, and UpPTS.

In a system in which a PUCCH serving cell (PCell or P-SCell, detailed description thereof will be described later) is set to frame structure 2 in TDD (frame structure type 2) or FDD-TDD, the UE transmits PDSCH in one or more downlink subframes HARQ-ACK information for can be transmitted in one uplink subframe. The UE may transmit HARQ-ACK information in the uplink subframe n with respect to the PDSCH transmission received in the downlink subframe nk, and the value k may be given according to the UL-DL configuration. For example, for the UL-DL configurations of Table 3, downlink association set index K as shown in Table 4 below: {k ₀ , k ₁ , ..., k _{M -1} } can be given That is, M downlink subframes may be associated with one uplink subframe n, and the M downlink subframes may be referred to as subframe nk _m (m=0, 1, ..., M-1). can

For example, in Table 4, in the case of UL-DL configuration index 0, k=4 is given for uplink subframe index 9, so one (ie, M=1) downlink subframe (ie, downlink HARQ-ACK information for data received in link subframe index 5 (ie, a subframe index preceding subframe index 9 by 4 subframes) may be transmitted in uplink subframe index 9. Alternatively, the table above In the case of UL-DL configuration index 5 in 4, since k = 13, 12, 9, 8, 7, 5, 4, 11, 6 for uplink subframe index 2, 9 (ie, M = 9) downlink subframes of (that is, downlink subframe index 9 (=2-13) of the previous radio frame of the immediately preceding radio frame, and downlink subframe index 0 (= 2-12) of the immediately preceding radio frame, 3(=2-9), 4(=2-8), 5(=2-7), 7(=2-5), 8(=2-4), 1(=2-11), 6( =2-6)), HARQ-ACK information for the received data may be transmitted in uplink subframe index 2.

In addition, in a specific TDD CA configuration environment (eg, when the TDD UL-DL configuration of the serving cells is different, or when the PCell is set to TDD and the SCell(s) is set to FDD), a specific serving cell (s) For (eg, for SCell(s)), a DL reference UL-DL configuration may be used. In that case, instead of the TDD UL-DL configuration of the corresponding serving cell (eg, TDD UL-DL configuration configured through SIB or RRC signaling), a subframe for HARQ-ACK transmission based on the DL reference UL-DL configuration Association (ie, HARQ-ACK timing) may be determined. For example, the HARQ-ACK timing of the serving cell having the TDD UL-DL configuration 0 may be determined by the DL reference UL-DL configuration 2. Such a DL reference UL-DL configuration may be determined according to a predetermined relationship between a PUCCH serving cell and a serving cell (eg, a PDSCH transmission serving cell) in which data is received and HARQ-ACK transmission is required. For example, in the case of CA for two serving cells having different TDD UL-DL configurations, the DL reference UL according to the combination of the TDD UL-DL configuration of the PUCCH serving cell and the TDD UL-DL configuration of the PDSCH transmission serving cell. -DL settings can be determined. Alternatively, in the case of FDD-TDD, the DL reference UL-DL configuration may be determined according to a combination of the TDD UL-DL configuration of the PUCCH serving cell and the PDSCH transmission FDD serving cell.

Hereinafter, the size of the HARQ-ACK codebook will be described.

CA up to 3GPP LTE Release-12 defines that up to 5 serving cells are merged. In one serving cell, transmission of up to two codewords is supported in one subframe according to the transmission mode, and the HARQ-ACK bit size for each codeword transmission is 1 bit. The ACK bit size is 2 bits.

In the case of FDD, HARQ-ACK for transmission in one downlink subframe is transmitted in one uplink subframe. In the case of FDD, the maximum number of HARQ-ACK bits may be determined according to Equation 1 below.

In Equation 1, K _mimo,c indicates whether or not the MIMO transmission mode is set in the serving cell c. If the value is 1, one codeword (CW) (or transport block (TB)) is transmitted in one PDSCH, or two CWs (or TB) are transmitted in one PDSCH and HARQ-ACK This is a case where spatial bundling is applied (spatial bundling means bundling HARQ-ACK information for two codewords (or TBs) in one subframe). If the value is 2, it means that two CWs (or TBs) are transmitted in one PDSCH and spatial bundling for HARQ-ACK is not applied. C is the number of serving cells configured for the terminal.

According to Equation 1, in the case of FDD, the maximum bit size of HARQ-ACK transmitted in one uplink subframe is 10 bits. That is, the case where C = 5 and K _mimo,c = 2 in each of all serving cells corresponds to the case where the HARQ-ACK bit size is the largest. Accordingly, in the case of FDD, HARQ-ACK reporting is possible using PUCCH format 3 even if five serving cells are configured.

In the case of TDD, HARQ-ACK for transmission in one or more downlink subframes is transmitted in one uplink subframe, and as shown in Table 4 above, HARQ-ACK for transmission in up to 9 downlink subframes is It may be transmitted in one uplink subframe. In the case of TDD, the maximum number of HARQ-ACK bits may be determined according to Equation 2 below.

In Equation 2, K _mimo,c indicates whether or not the MIMO transmission mode is set in the serving cell c. If the value is 1, one codeword (CW) (or TB) is transmitted in one PDSCH, or two CWs (or TB) are transmitted in one PDSCH and spatial bundling for HARQ-ACK is applied If the value is 2, it means that two CWs (or TBs) are transmitted in one PDSCH and spatial bundling for HARQ-ACK is not applied. M _c means the number of downlink subframes associated with an uplink subframe in which PUCCH is transmitted. C is the number of serving cells configured for the terminal.

According to Equation 2, in the case of TDD and the same TDD UL-DL configuration is applied to serving cells, the maximum bit size of HARQ-ACK transmitted in one uplink subframe is theoretically 90 bits. . That is, a case in which C = 5, K _mimo,c = 2 in each of all serving cells, and M _c =9 in each of all serving cells corresponds to a case in which the HARQ-ACK bit size is theoretically maximum. However, in the case of TDD, since CA is set with the following restrictions, the size of the HARQ-ACK bit transmitted in one uplink subframe may vary depending on the case.

Specifically, in the CA of 3GPP LTE Release-10, the TDD UL-DL configuration is the same for each serving cell. When TDD UL-DL configuration index 5 (that is, 9 downlink subframes are associated with one uplink subframe) is applied, only up to two serving cells may be configured (more than two servings) For cells, the number of bits supported by PUCCH format 3 is exceeded). In this case, the maximum number of HARQ-ACK bits is 36 (ie, it is assumed that C = 2, K _mimo,c = 2 in each of the two serving cells, and M _c = 9 in each of the two serving cells).

In CA of 3GPP LTE Release-11, the TDD UL-DL configuration may be different for each serving cell. In this case, a downlink UL-DL configuration serving as a reference (ie, the aforementioned DL reference UL-DL configuration) may be determined according to the UL-DL configuration of the PCell and the SCell. If the downlink reference UL-DL configuration index 5 is applied, only up to two serving cells may be configured. In this case, the maximum number of HARQ-ACK bits is 36 (ie, it is assumed that C = 2, K _mimo,c = 2 in each of the two serving cells, and M _c = 9 in each of the two serving cells).

In addition, in the case of TDD, if the number of HARQ-ACK bits is greater than 20 bits, spatial bundling is applied to all serving cells. First, bundling refers to an operation for expressing multiple-bit HARQ-ACK information with a smaller number of bits. For example, bundling may be performed by logical AND, but this is only an example, and bundling may be performed using other calculation methods (eg, logical OR). Next, spatial bundling means bundling HARQ-ACK information for two codewords in one subframe.

In CA of 3GPP LTE Release-12, TDD and FDD may be configured differently for each serving cell (this can be expressed as FDD-TDD configuration). If PUCCH format 3 is configured for the terminal, when the number (ie, M) of downlink subframes associated with one uplink subframe is greater than 4, the HARQ-ACK bit size to be transmitted in PUCCH format 3 is 21 The number of CA serving cells is limited so as not to exceed . That is, since the HARQ-ACK bit size is not allowed to exceed 21 bits even after spatial bundling is applied for transmission in PUCCH format 3, the number of CA serving cells causing this cannot be configured.

As such, it can be seen that even in the case of a conventional CA in which up to five serving cells can be configured, HARQ-ACK transmission in all possible cases is not supported. Meanwhile, recently, eCA (enhanced CA) that merges more than 5 (eg, up to 32) serving cells is being discussed. In this case, the maximum number of bits of HARQ-ACK is 64 bits according to Equation 1 above in the case of FDD (ie, a case where C = 32 and K _mimo,c = 2 in each of the two serving cells is assumed), In the case of TDD, according to Equation 2 above, 576 bits (ie, C = 32, assuming that K _mimo,c =2 in each of 32 serving cells, and M _c =9 in each of 32 serving cells), FDD In TDD, when PCell is set to TDD and 31 SCells are set to FDD, the maximum number of HARQ-ACK bits reaches 638 bits (that is, C = 32, and K _mimo,c = 2 in each of 32 serving cells) , TDD UL-DL configuration index 5 is applied to the PCell so that 9 downlink subframes are associated with one uplink subframe, and 10 downlink subframes are one uplink subframe in each of 31 SCells. Assuming it is related to ).

In order to support such eCA, the introduction of a new PUCCH format having a larger capacity than the conventional PUCCH format is being discussed. This new PUCCH format is referred to herein as PUCCH format 4, but is not limited thereto.

In the present invention, PUCCH format 4 may mean a new PUCCH format with a capacity to support control information bits of a size exceeding P bits (that is, the size of control information bits before channel coding is applied exceeds P bits). Here, P may be 22, which is the maximum control information bit size supported by PUCCH format 3. In addition, the maximum capacity that PUCCH format 4 can support may be 64 bits in FDD and at least 128 bits in TDD. Alternatively, PUCCH format 4 may support a 128-bit size without distinguishing the frame structure.

For example, in PUCCH format 4, when more than 5 serving cells are configured for the terminal, or 5 or less serving cells are configured for the terminal, when the control information bit size to be transmitted exceeds 22 can be used

7 and 8 are diagrams for explaining an exemplary structure of PUCCH format 4;

Regarding the structure of the PUCCH format 4, two types of format structures are largely discussed.

The type 1 PUCCH format 4 structure as in the example of FIG. 7 is a PUCCH format 3 structure in a plurality of PRB pairs (eg, the structure of the PUCCH format 3 in FIG. 6 is extended to a plurality of PRB pairs). . That is, the PRB pair used for PUCCH format 3 consists of one PRB of one frequency edge of the system bandwidth of one slot and one PRB of the opposite frequency edge of the other slot within one subframe. do. Type 1 PUCCH format 4 is in the direction of the PUSCH region in the PRB pair used for PUCCH format 3 (that is, from both frequency edges of the system bandwidth to the center (or DC) (that is, in the INWARD direction)) One PRB pair may be further used.

The type 2 PUCCH format 4 structure as in the example of FIG. 8 uses a part of the PUSCH region instead of the PUCCH region. In the example of FIG. 8 , resources used for type 2 PUCCH format 4 are not limited to the size of one PRB in one slot, and one or a plurality of PRB pairs may be used. Even if one PRB pair is used for PUCCH format 4, a structure for allocating more information than information allocated by PUCCH format 3 using one PRB pair may be used.

In the example of FIG. 8 (a), a PRB pair used for PUCCH format 4 in a subframe is frequency hopping (ie, intra-subframe frequency hopping) to a slot boundary, and a DMRS structure similar to PUSCH is used for PUCCH format 4 in case it becomes

In the example of FIG. 8(b), a PRB pair used for PUCCH format 4 is not intra-subframe frequency hopping, and a DMRS structure similar to PUSCH is used for PUCCH format 4.

In the example of FIG. 8( c ), a PRB pair used for PUCCH format 4 is intra-subframe frequency hopping, and a DMRS structure similar to PUCCH format 3 is used for PUCCH format 4 .

Hereinafter, when a new PUCCH format (ie, PUCCH format 4) is configured for a terminal according to the present invention, a new resource allocation scheme for PUCCH format 4 will be described. For example, a method of instructing new resource allocation for PUCCH format 4, a method of deriving a resource to which the terminal will allocate control information based on this resource allocation instruction, a method of deriving a resource to which the terminal is to allocate control information, control information on a physical resource based on the derived resource Examples of the present invention for a mapping method will be described.

PUCCH format 4 is configured for the terminal, in general, when more than C (eg, C = 5) serving cells are configured for the terminal (or when eCA is configured), HARQ-ACK transmission it may be for However, the case in which PUCCH format 4 is configured is not limited thereto, and when TDD UL-DL configuration index 5 is applied to the PUCCH transmission serving cell, downlink reference UL-DL configuration index 5 in TDD CA or FDD-TDD CA When is applied, PUCCH format 4 may be configured for the UE for HARQ-ACK transmission even when 2≤C≤5 serving cells are configured for the UE.

The setting of PUCCH format 4 for the terminal is, for example, indicated through a parameter called PUCCH - Format of an IE named PUCCH - Config among information elements (IEs) for higher layer signaling (eg, RRC signaling). can be Alternatively, it may be set implicitly through other parameters or settings. For example, when the resource for PUCCH format 4 can be derived from the terminal, it may mean that PUCCH format 4 is configured.

The eCA configuration for the terminal and the PUCCH format 4 configuration for the terminal may not be related to each other. That is, when eCA is configured, PUCCH format 4 may be configured, or PUCCH format 4 may be configured even if eCA is not configured. In this case, whether to set PUCCH format 4 is determined by considering the number of serving cells configured for the terminal, the frame structure type of the serving cell for PUCCH transmission (ie, the first type of FDD or the second type of TDD), etc. to the base station. may be appropriately determined by Alternatively, if the configuration of the PUCCH format 4 for the terminal and the configuration of the eCA are related, when the eCA is configured for the terminal, the PUCCH format 4 may be configured for the terminal.

That eCA is configured for the UE may mean that a parameter (or higher layer signaling including the same) for a new operation not supported in CA configuration is provided to the UE. For example, that eCA is configured for the UE means that more than C serving cells (eg, C=2 in the case of TDD UL-DL configuration 5 or DL reference UL-DL configuration 5, C=2 in the case of FDD-TDD) In HARQ-ACK, if the number of serving cells does not exceed 21 bits, C = X, in other cases, C = 5) may mean that the terminal is set. Also, that eCA is configured for the UE may mean that higher layer parameters related to the eCA operation are configured. For example, the higher layer parameter related to the eCA operation may include a parameter indicating whether to allow PUCCH transmission through the SCell. Alternatively, the setting for the eCA and the setting for whether to allow PUCCH transmission through the SCell may be defined as separate settings.

PUCCH transmission on the PCell is mandatory for the UE, but PUCCH transmission on the SCell is allowed by the base station for the UE. An SCell in which PUCCH transmission is configured may be referred to as a P-SCell. The PCell and the P-SCell may be collectively referred to as a PUCCH serving cell. For PUCCH on PCell or PUCCH on P-SCell, serving cell(s) associated with the corresponding PUCCH may exist. For example, when the HARQ-ACK for the PDSCH in the second serving cell is transmitted through the PUCCH of the first serving cell (ie, the PDSCH transmission serving cell and the PUCCH transmission serving cell are different from each other), the second The second serving cell may be said to be related to the PUCCH of the first serving cell. The serving cell associated with the PUCCH on the first serving cell may include the first serving cell itself (that is, when HARQ-ACK for the PDSCH in the first serving cell is transmitted through the PUCCH of the first serving cell). Serving cell(s) associated with PUCCH on PCell may also exist, serving cell(s) associated with PUCCH on P-SCell may also exist, and serving cell(s) associated with PUCCH on one serving cell is "serving" It may be referred to as a “cell group” or “PUCCH serving cell group”. That is, one serving cell group includes one PUCCH serving cell (eg, PCell or P-SCell configured with PUCCH transmission), or one PUCCH serving cell and one or more non-PUCCH serving cells (eg, For example, it may include one or more SCells for which PUCCH transmission is not configured). If PUCCH transmission is allowed to the UE in one or more P-SCells, it may be said that at least two or more serving cell groups exist, including a serving cell group related to PUCCH on the PCell. It is assumed that various examples according to the present invention are applied in units of one serving cell group (or for each serving cell group) for convenience of description. However, even when a serving cell group is not explicitly distinguished in a terminal in which a plurality of PUCCH serving cells are configured, the application of various examples according to the present invention is not excluded.

As a PUCCH transmission format for HARQ-ACK transmission in a CA environment, PUCCH format 3 or PUCCH format 1b to which channel selection is applied may be used. The size of the HARQ-ACK payload to be transmitted through the PUCCH format may be determined based on a parameter semi-statically configured to the UE through higher layer signaling (eg, RRC signaling). In the case of FDD, the number of serving cells configured for the UE and the transmission mode (eg, whether MIMO transmission mode is applied or not) in each serving cell, and accordingly, the number of codewords (or transport blocks) transmittable in one PDSCH is determined), the HARQ-ACK payload size may be determined. In the case of TDD, the number of serving cells configured for the terminal, the transmission mode in each serving cell, and the bundling window size (that is, the number of downlink subframes associated with HARQ-ACK transmission in one uplink subframe) Based on the HARQ-ACK payload size may be determined.

In a wireless communication environment, the terminal may miss the scheduling information or data transmission transmitted by the base station, or may erroneously determine that an error has occurred but correctly received it (that is, originally it should be NACK, but incorrectly determined as ACK). When such an error occurs, a difference may occur between the number of bits of HARQ-ACK to be actually transmitted and the size of the HARQ-ACK payload induced by the UE, and thus performance may be deteriorated. However, in the CA environment, even if such an error occurs, there is no big problem in terms of the efficiency of PUCCH transmission. That is, in the CA environment, the number of serving cells configured for the terminal is not large (that is, in 3GPP LTE Release-10, which introduced CA for the first time, a scenario in which two CCs are configured in the terminal is basically considered), and scheduling is performed There is a difference in the HARQ-ACK payload size determined based on the number of HARQ-ACK bits to be actually transmitted according to the number of serving cells and a parameter semi-statically set to the terminal (that is, the number of serving cells set for the terminal). Even so, the difference was not large.

On the other hand, when the currently under discussion eCA is introduced, since a maximum of 32 serving cells can be configured for one UE, the HARQ-ACK payload size is determined based on a parameter that is semi-statically configured through higher layer signaling, and , when the PUCCH format is selected based on this, the inefficiency may be amplified. That is, even when a maximum of 32 serving cells are configured for one terminal, the number of serving cells that the base station schedules to the terminal on one subframe (that is, downlink allocation is performed) may be much less than 32. , DL transmission for which HARQ-ACK is actually required (that is, PDSCH indicated by (E)PDCCH detection or PDSCH transmitted without (E)PDCCH detection (collectively, PDSCH may be simply referred to), or DL SPS release There may be a large difference in the size of the HARQ-ACK payload corresponding to (E) PDCCH indicating . Therefore, it may be considered to determine the HARQ-ACK payload size based on the number of serving cells that are actually scheduled (that is, downlink allocation is performed), rather than based on the number of serving cells configured for the UE. .

As a new method for determining the structure of the PUCCH format 4 and the HARQ-ACK payload size newly introduced as described above is applied, a new resource allocation method for the PUCCH format 4 is required. In the present invention, an efficient method for dynamically indicating a resource to which PUCCH format 4 is allocated, a method for deriving a resource to which the terminal will allocate control information based on such a resource allocation indication, and control information on a physical resource based on the derived resource Examples of the present invention for a method of mapping .

)을 포함)가 설정되는 것을 가정한다. 단말에게 설정된 하나의 자원 세트 중에서 어떤 PUCCH 포맷 4 자원(

)이 할당되는지에 대한 정보 및 관련 정보의 지시를 위해, (E)PDCCH 하향링크 DCI(예를 들어, DCI 포맷 1/1A/1B/1D/2/2A/2B/2C/2D) 포맷 내의 소정의 2 비트 필드가 이용될 수 있다. 예를 들어, SCell 상의 PDSCH를 스케줄링하는 PDCCH 또는 하향링크 SPS 해제를 지시하는 PDCCH 내의 TPC 명령 필드가 이용될 수 있다. 또는 EPDCCH를 통해서 DCI를 제공하는 경우에는, 하향링크 DCI 포맷 내의 HARQ-ACK 자원 오프셋 필드가 이용될 수도 있다. 이하의 예시에서는 설명의 간명함을 위해서 TPC 필드 또는 HARQ-ACK 자원 오프셋 필드를 이용하는 것으로 설명하지만, 본 발명의 범위가 이에 제한되는 것은 아니다. In the examples of the present invention described below, one resource set for PUCCH format 4 semi-statically by a higher layer (eg, RRC) (ie, a plurality of PUCCH format 4 resources (

) is assumed to be set. Which PUCCH format 4 resource (

) is allocated, and for indication of related information, (E) PDCCH downlink DCI (eg, DCI format 1/1A/1B/1D/2/2A/2B/2C/2D) format A 2-bit field of may be used. For example, a PDCCH for scheduling a PDSCH on the SCell or a TPC command field in a PDCCH indicating release of downlink SPS may be used. Alternatively, when DCI is provided through the EPDCCH, the HARQ-ACK resource offset field in the downlink DCI format may be used. In the following example, it is described that the TPC field or the HARQ-ACK resource offset field is used for the sake of brevity, but the scope of the present invention is not limited thereto.

In addition, in the examples of the present invention described below, one set (ie, multiple RIV) can be set. RIV is information indicating a starting point (RB _START ) of an RB that is a resource allocation target and the number (or length) of RBs continuously allocated (L _CRBs ). Whether the RB corresponding to the RB starting point is the lowest index (ie, whether one or more RBs are allocated in the order of increasing the index starting with the RB of the lowest index) or the highest index among RBs that are continuously allocated Depending on whether one or more RBs are allocated in the order of decreasing index starting with the RB of the highest index), the same RIV value may indicate different RB allocation, so a clear criterion for the RB starting point is required. In the present invention, from both frequency edges of the system bandwidth to the center (or DC) (hereinafter, INWARD direction) based on the RB starting point, or from the center (or DC) of the system bandwidth to both frequency edges. A direction (ie, an OUTWARD direction) may be indicated, but in the absence of such an indication, an INWARD direction (ie, a direction in which the absolute frequency value decreases) in the uplink resource structure as shown in FIG. 5 RB It is assumed that the allocation is determined. However, the scope of the present invention is not limited thereto, and without an indication of the direction of RB allocation for PUCCH format 4, in the uplink resource structure as shown in FIG. 5 in the OUTWARD direction (that is, in the direction in which the absolute frequency value increases) ), it may be assumed that the RB allocation is determined.

9 is a diagram for explaining an example of PUCCH format 4 resource allocation according to the present invention.

) 및 RIV가 제공될 수 있다. 여기서, PUCCH 포맷 4 전송에 대해서 전송 다이버시티가 설정되는 경우(예를 들어, 2 개의 안테나 포트가 설정되는 경우), 안테나 포트 인덱스(즉,

)의 각각에 대해서 PF4 자원 인덱스가 시그널링될 수 있다. As information related to resource allocation of PUCCH format 4 (hereinafter, PF4), the PF4 resource index (

) and RIV may be provided. Here, when transmit diversity is configured for PUCCH format 4 transmission (eg, when two antenna ports are configured), the antenna port index (ie,

), a PF4 resource index may be signaled for each.

) 및 RIV의 매핑 관계를 나타낸다. Table 5 below shows the value of the TPC command field (hereinafter, TPC) for PUCCH or the value of the HARQ-ACK resource offset field (hereinafter, HRO), and the PUCCH format 4 resource index (

) and the mapping relationship of RIV.

As shown in Table 5, the PUCCH resource index and RIV may be jointly encoded and indicated by the value of the TPC or HRO field. As shown in Table 5, the RIV value indicated according to the TPC or HRO value may correspond to any one of the RIV sets set by the upper layer. Here, the RIV set may include RIVs corresponding to the number of all cases of the PF4 resource allocation pattern, but may include RIV values corresponding to the number of some of them. For example, four RIV values may be set to the UE as one RIV set by a higher layer, and one RIV value may be indicated through TPC or HRO.

=

). 이 경우, 파라미터

는 별도로 정의되지 않을 수도 있다. If PF4 is configured for the UE and a PF4 resource set is configured, which PF4 resource is used may be indicated through the value of the TPC or HRO field. If the structure of PF4 is type 1 (eg, extension of the structure of PF3, see FIG. 7 ), the resource set for PF3 may be used as the resource set for PF4 (ie,

=

). In this case, the parameter

may not be separately defined.

If the PF4 structure is type 1, the RIV may indicate from which RB how many RBs are allocated for the PF4. That is, the TPC or HRO may indicate a specific RIV from among the RIV sets set in the upper layer.

RIV for PF4 (ie, RIV _PUCCHformat4 ) may be defined as in Equation 3 below.

는 상위 계층 시그널링에 의해 셀-특정으로 설정될 수 있으며, PUCCH 포맷 2/2a/2b(이하, PF2/2a/2b)에 의해서 사용될 수 있는(available for use) 대역폭이며,

(즉, 하나의 RB내의 부반송파 개수)의 정수배의 형태로 표현될 수 있다. RB_START 는 PF4를 위해 할당되는 RB의 시작점을 나타내고, L_CRBs는 연속적으로 할당되는 RB의 개수(또는 길이)를 나타낸다. 또한,

는 플로어(floor) 연산으로서,

는 x를 초과하지 않는 최대의 정수(즉, x 이하의 최대의 정수)를 의미한다.here,

may be cell-specifically configured by higher layer signaling, and is a bandwidth available for use by PUCCH format 2/2a/2b (hereinafter, PF2/2a/2b),

(ie, the number of subcarriers in one RB) may be expressed in the form of an integer multiple. RB _START denotes a starting point of RBs allocated for PF4, and L _CRBs denotes the number (or length) of consecutively allocated RBs. In addition,

is a floor operation,

is the largest integer that does not exceed x (ie, the largest integer less than or equal to x ).

내의 RB 들에 할당될 수 있다. 이 경우, 기지국은 각각의 PUCCH 포맷에 대해 할당되는 자원이 충돌하지 않도록 설정할 수 있다. In the case of type 1 PF4, as in the example of FIG. 9 , PF2/2a/2b, PF3 and type 1 PF4 are all

may be allocated to RBs in In this case, the base station may set so that resources allocated for each PUCCH format do not collide.

)이, PF4가 할당될 수 있는 자원 영역을 지시하는 것으로 재사용 또는 해석되고(즉,

값이 지시하는 자원 영역에 할당될 수 있는 PUCCH 포맷에는 PF2/2a/2b, PF3 및 PF4가 모두 포함될 수 있음), RIV 값을 통해서 해당 자원 영역 내에서 PF4가 실제로 할당되는 자원 영역(즉, 실제 PF4 전송을 위해 제어 정보가 매핑되는 자원 영역)을 지시할 수 있다.That is, in the example of FIG. 9, a value (ie, a value indicating a cell-specifically an area to which a PF2 or PF3 resource is allocated)

) is reused or interpreted as indicating a resource area to which PF4 can be allocated (that is,

The PUCCH format that can be allocated to the resource region indicated by the value may include all of PF2/2a/2b, PF3 and PF4) and the resource region to which PF4 is actually allocated within the resource region through the RIV value (that is, the actual A resource region to which control information is mapped for PF4 transmission) may be indicated.

A terminal that has determined RIV based on the value of TPC or HRO is RB _START and L _CRBs through Equation 4 below value can be derived. Here, it is assumed that the RB allocation is determined in the INWARD direction (ie, the direction in which the absolute frequency value decreases).

As such, it is necessary to determine the RB _START and L _CRBs values from the RIV values, and additionally determine the correct slot position for PF4 resource allocation.

10 is a diagram for explaining a method for determining a slot to which a PF4 resource is allocated.

)에 의해서 결정될 수 있다.The slot position to which the PF4 resource is allocated is determined by the PF4 resource index (

) can be determined by

은 하나의 서브프레임의 첫 번째 슬롯(슬롯 인덱스가 0부터 시작하는 경우 짝수 번째 슬롯)에 적용되는 확산 인자(spreading factor)의 값이며, 직교커버코드(OCC)의 적용에 따른 다중화 용량(multiplexing capacity)를 의미할 수 있다. 타입-1 PF4와 같이 PF3의 구조를 따르는 경우에는 일반적인 슬롯에서의 확산 인자 값은 5로 주어지지만, SRS 전송으로 인한 짧은 PF4 포맷이 사용되는 경우에는 확산 인자의 값이 4로 주어질 수 있다. here

is the value of the spreading factor applied to the first slot of one subframe (the even-numbered slot when the slot index starts from 0), and multiplexing capacity according to the application of the orthogonal cover code (OCC) ) can mean When following the PF3 structure like Type-1 PF4, a spreading factor value of 5 is given in a general slot, but when a short PF4 format due to SRS transmission is used, a spreading factor value of 4 may be given.

는 별도로 정의되지 않고

=

에 따라서 상기 수학식 5에서 m 값이 결정될 수 있다. In addition, in the case of type-1 PF4, as described above, since the resource set for PF3 may be used as the resource set for PF4, the parameter

is not defined separately

=

Accordingly, the value of m in Equation 5 may be determined.

When the m value is derived in this way, the PRB allocation position may be determined according to the m value as shown in FIG. 10 . This m value may indicate to which PRB is allocated PF4 from a frequency edge (ie, both ends of a system bandwidth) in each slot in one subframe.

On the other hand, in the case of type-2 PF4, since PF4 is not allocated to the PUCCH region, the m value may not be required.

), PF4에 의해서 사용될 수 있는 RB 내에서 PF4가 할당되는 RB의 시작점(RB_START), 연속하는 RB의 개수(또는 길이) (L_CRBs), 할당되는 슬롯을 결정하는 인자(m)가 제공되면, 최종적으로 슬롯 인덱스 n _s에서 PF4를 위해서 사용되는 (즉, 실제 PF4 전송을 위해 제어 정보가 매핑되는) PRB 인덱스는 아래의 수학식 6에 따라서 결정될 수 있다. The number of RBs that can be used by PF4 (

), the starting point (RB _START ) of the RB to which PF4 is allocated within the RB that can be used by PF4, the number (or length) of consecutive RBs (L _CRBs ), and a factor (m) that determines the slot to be allocated. , finally the PRB index used for PF4 in the slot index n _s (ie, to which control information is mapped for actual PF4 transmission) may be determined according to Equation 6 below.

값은 연속적으로 L_CRBs 의 개수만큼 결정된다. 이러한 L_CRBs 개의

값들은, PF4를 위해 할당되는 (즉, 실제 PF4 전송을 위해 제어 정보가 매핑되는) 복수개의 물리적인 자원을 지시한다. Here, mod is a modulo operation, and A mod B means the remainder of dividing A by B. PRB index determined according to Equation 6

Values are successively L _CRBs is determined by the number of These L _-CRBs doggy

Values indicate a plurality of physical resources allocated for PF4 (ie, to which control information is mapped for actual PF4 transmission).

11 and 12 are diagrams for explaining additional examples of PUCCH format 4 resource allocation according to the present invention.

를 재사용하는 대신, 새로운 파라미터 N ⁽⁴⁾ _PUCCH,RB 가 상위계층 시그널링을 통해서 반-정적으로 단말에게 설정될 수도 있다. 즉, N ⁽⁴⁾ _PUCCH,RB 는 PF4에 의해서 사용될 수 있는(available for use) 대역폭을 나타내는 파라미터이다. 예를 들어, N ⁽⁴⁾ _PUCCH,RB 는 단말-특정으로 설정될 수 있고, N ⁽⁴⁾ _PUCCH,RB 의 값은 N ⁽⁴⁾ _PUCCH,RB ≤

으로 설정될 수도 있다. 그러나, 본 발명의 범위가 이에 제한되는 것은 아니며,

와 별개의 값으로 N ⁽⁴⁾ _PUCCH,RB 의 값이 설정될 수도 있다. As in the example of FIG. 9, for PF4 resource allocation

Instead of reusing , a new parameter N ⁽⁴⁾ _PUCCH,RB may be semi-statically configured to the UE through higher layer signaling. That is, N ⁽⁴⁾ _PUCCH,RB is a parameter indicating a bandwidth available for use by PF4. For example, N ^{(4) PUCCH} _{,RB may} be configured to be UE-specific, and the value of N (4) PUCCH,RB is N ⁽⁴⁾ _PUCCH,RB ≤

may be set to However, the scope of the present invention is not limited thereto,

A value of N ⁽⁴⁾ _PUCCH,RB may be set as a separate value from .

In addition, N ⁽⁴⁾ _PUCCH,RB is involved in the determination of the PRB area usable by PF4, and the PRB area usable by PF4 is partially or all of the area usable by PF2/2a/2b and PF3. Any PRB that may overlap, or PF2/2a/2b, irrespective of the area usable by PF3 (eg, within the area usable by PUCCH format 1/1a/1b and/or PUSCH area) It may be an area.

When N ⁽⁴⁾ _PUCCH,RB is configured for the UE, RIV for PF4 (ie, RIV _PUCCHformat4 ) may be defined as in Equation 7 below.

The position on the physical resource of the number of RB(s) determined by N ⁽⁴⁾ _{PUCCH, RB} may be indicated or determined by a new parameter N ⁽⁴⁾ _{RB, START} . N ⁽⁴⁾ _{RB, START} may be semi-statically configured to the UE by a higher layer.

For example, as in the examples of FIGS. 11 and 12 , N ⁽⁴⁾ _PUCCH,RB in the INWARD direction (ie, in the direction in which the absolute frequency value decreases) The starting position of the RBs may be indicated or determined by N ⁽⁴⁾ _RB,START .

In the case of type-1 PF4, as in the example of FIG. 11 , the PRB position indicated by N ⁽⁴⁾ _RB,START may be set to a value corresponding to the PRB position in the PUCCH region (eg, N ⁽⁴⁾ _{RB ,START} + N ⁽⁴⁾ _{PUCCH, RB} may be set to be equal to or less than the size of the PUCCH region (ie, the number of PRBs allocated to the PUCCH region).

In the case of type-2 PF4, as in the example of FIG. 12 , N ⁽⁴⁾ _RB,START may be set to a value corresponding to the PRB position of the boundary with the PUCCH region in the PUSCH region.

로 대체된 경우에 해당할 수 있다.The example of FIG. 9 is N ⁽⁴⁾ _RB,START in the example of FIGS. 11 and 12 . The value is always 0 (therefore N ⁽⁴⁾ _RB,START need not be set), and N ⁽⁴⁾ _PUCCH,RB go

may be replaced by

를 N ⁽⁴⁾ _PUCCH,RB 으로 대체한 수학식에 따라서 결정되는) RB_START 및 L_CRBs 값에 따라서, PF4가 할당되는 (즉, 실제 PF4 전송을 위해 제어 정보가 매핑되는) 자원 위치가 결정될 수 있다. 즉, 도 11 및 도 12의 예시는 N ⁽⁴⁾ _PUCCH,RB 에 의해서 지시되는 PF4에 의해서 사용될 수 있는 RB의 개수가 4개이고, RIV로부터 유도되는 RB_START 에 의해서 결정되는 RB 시작 위치가 두 번째 RB이고, L_CRBs 에 의해서 결정되는 RB 개수가 2개인 경우에 해당한다. N ⁽⁴⁾ _{PUCCH, RB} Within the RB(s) that can be used by PF4 indicated by

N ⁽⁴⁾ _PUCCH,RB RB _START and L _CRBs (determined according to the equation replaced by According to the value, a resource location to which PF4 is allocated (ie, to which control information is mapped for actual PF4 transmission) may be determined. That is, the examples of FIGS. 11 and 12 are N ⁽⁴⁾ _{PUCCH, RB} The number of RBs usable by PF4 indicated by is 4, the RB start position determined by RB _START derived from RIV is the second RB, and L _CRBs This corresponds to a case in which the number of RBs determined by is two.

값에 기초하여 결정되는 m 값으로부터 어떤 슬롯의 PRB 영역에 PF4가 할당되는지가 결정되므로 (상기 수학식 5 참조), 기지국은 단말이 PF4를 위해서 사용할 자원 위치를 동적으로 지시할 수 있다. 한편, 타입-2 PF4의 경우에는 m 값이 요구되지 않을 수도 있다. In addition,

Since the PRB area of which slot is allocated PF4 is determined from the m value determined based on the value (refer to Equation 5 above), the base station can dynamically indicate the resource location to be used by the terminal for PF4. On the other hand, in the case of type-2 PF4, the value of m may not be required.

That is, the starting point ( N ⁽⁴⁾ _RB,START ) and number ( N ⁽⁴⁾ _PUCCH,RB ) of the RB that can be used by PF4, the starting point of the RB to which PF4 is allocated in the RB that can be used by PF4 (RB _START ), the number (or length) of consecutive RBs (L _CRBs ), and a factor (m) determining the allocated slot are provided, finally used for PF4 in the slot index n _s (that is, the actual PF4 transmission A PRB index to which control information is mapped) may be determined according to Equation 8 below.

In the examples described with reference to FIGS. 9 to 12, related information, scheduling information or configuration parameters (eg, the frame structure of the PUCCH serving cell, the number of serving cells configured for the UE, HARQ-ACK information and periodic CSI At least one of a parameter for simultaneous transmission or not, the bit size of uplink control information to be transmitted, the number of serving cells in which downlink transmission is scheduled, a transmission mode in each serving cell, or the number of transport blocks scheduled in each serving cell) Based on , the PUCCH format may be dynamically determined as one of PF1/1a/1b, PF2/2a/2b, PF3, or PF4. When it is determined to use PF4, resources for PF4 may be dynamically determined as in the examples described with reference to FIGS. 9 to 12 .

In addition to this, the PUCCH format used by the terminal may be dynamically indicated by the base station without dynamically determining the PUCCH format based on related information, scheduling information, or configuration parameters.

For example, in addition to the PUCCH resource index and RIV, the PUCCH format may be dynamically indicated through the TPC or HRO field of the downlink DCI format. This example may be said to be a case in which the PUCCH format is indicated by TPC or HRO in addition to the example of Table 5, and may be shown in Table 6 or Table 7 below.

As shown in Tables 6 and 7 above, the PUCCH resource index, RIV, and PUCCH format indicator may be jointly encoded and indicated by the value of the TPC or HRO field.

Table 6 shows a case in which one of PF3 or PF4 is indicated through TPC or HRO. Table 7 is an example of which type of PF4 can be indicated through TPC or HRO when both types of PF4 (refer to FIGS. 7 and 8 ) are supported. The above Tables 6 and 7 are merely exemplary, and a specific value of the TPC or HRO field may indicate another PUCCH format (eg, 00 and 01 indicate PF3, and 10 and 11 indicate PF4) case, etc.). However, when PF3 is indicated, the RIV corresponding to the value of TPC or HRO may be interpreted as invalid for the corresponding terminal.

In this way, when the PUCCH format is dynamically and explicitly indicated, both the terminal and the base station can clearly determine the PUCCH format dynamically. If the terminal determines the PUCCH format based on related information, scheduling information, or configuration parameters, and does not receive some of the information or receives it incorrectly, the PUCCH format of the terminal expected by the base station and the terminal are actually The PUCCH format used may be different, and in this case, uplink control information directly related to system performance may not be transmitted/received correctly. Accordingly, this problem can be prevented and system performance can be improved by the base station explicitly indicating the PUCCH format to the terminal.

13 to 15 are diagrams for explaining additional examples of PUCCH format 4 resource allocation according to the present invention.

In the examples of FIGS. 9 to 12 described above, without an indication of the direction of PF4 resource allocation, RB allocation is determined in a specific direction (eg, INWARD direction (ie, in a direction in which the absolute frequency value decreases)) assumed. That is, if RBs for PF4 are always allocated in one direction based on the RB starting point, the degree of freedom of RB allocation is restricted and resources including more than one RB at the edge of the system bandwidth or at the boundary between the PUCCH region and the PUSCH region. The pattern of allocation may be limited. Accordingly, a more flexible PUCCH resource allocation scheme is required to more efficiently utilize resources.

For example, according to the present invention, as in FIGS. 13 to 15, the RB starting point may be indicated in the INWARD direction (ie, the direction in which the absolute frequency value decreases) or the OUTWARD direction (ie, the direction in which the absolute frequency value increases). have.

To this end, in addition to the PUCCH resource index and RIV (also PUCCH format), the resource allocation direction may be dynamically indicated through the TPC or HRO field of the downlink DCI format. This example can be said to be a case in which the PUCCH format is indicated by TPC or HRO in addition to the examples of Tables 5, 6, or 7, and can be represented as shown in Table 8 below (Table 6 or 7 in addition to Table 8 below) The PUCCH format may be indicated as in).

As shown in Table 8 above, the PUCCH resource index, RIV, and resource allocation direction indicator (also PUCCH format indicator) may be jointly encoded and indicated by the value of the TPC or HRO field.

또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 기초하여 PF4에 의해서 사용될 수 있는 RB 영역이 결정될 수 있고, RB 할당 방향 (INWARD 또는 OUTWARD) 및 RIV 값에 기초하여 PF4에 의해서 사용될 수 있는 RB 영역 내에서 PF4가 할당되는 RB의 시작점(RB_START), 연속하는 RB의 개수(또는 길이) (L_CRBs)이 결정될 수 있고, PF4 자원 인덱스(

)에 기초하여 PF4가 할당되는 슬롯을 결정하는 인자(m)가 결정될 수 있다. Accordingly, as in the examples of FIGS. 13 to 15,

Alternatively, the RB area that can be used by PF4 may be determined based on N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START , and the RB area to be used by PF4 based on the RB allocation direction (INWARD or OUTWARD) and the RIV value The starting point (RB _START ) of the RB to which PF4 is allocated within the available RB area, the number (or length) of consecutive RBs (L _CRBs ) may be determined, and the PF4 resource index (

), a factor (m) for determining a slot to which PF4 is allocated may be determined.

개의 RB 중에서 시스템 대역폭의 에지에 가장 가까운 (즉, 주파수 절대값이 가장 큰) PRB로 결정될 수 있고, RB 할당 방향이 OUTWARD으로 지시되는 경우에는 RIV에 의해서 유도되는 RB_START가

개의 RB 중에서 시스템 대역폭의 에지로부터 가장 먼 (즉, 주파수 절대값이 가장 작은) PRB로 결정될 수 있다. 또한, 도 14 및 도 15의 예시에서와 같이 RB 할당 방향이 INWARD으로 지시되는 경우에는 RIV에 의해서 유도되는 RB_START가 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지에 가장 가까운 (즉, 주파수 절대값이 가장 큰) PRB로 결정될 수 있고, RB 할당 방향이 OUTWARD으로 지시되는 경우에는 RIV에 의해서 유도되는 RB_START가 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지로부터 가장 먼 (즉, 주파수 절대값이 가장 작은) PRB로 결정될 수 있다.For example, when the RB allocation direction is indicated by INWARD as in the example of FIG. 13, RB _START induced by RIV is

Among the RBs, the PRB closest to the edge of the system bandwidth (that is, the absolute frequency value is the largest) may be determined, and when the RB allocation direction is indicated as OUTWARD, the RB _START induced by the RIV is

Among the RBs, the PRB that is farthest from the edge of the system bandwidth (ie, has the smallest absolute frequency value) may be determined. In addition, when the RB allocation direction is indicated as INWARD as in the examples of FIGS. 14 and 15 , the RB _START induced by RIV is the closest to the edge of the system bandwidth among N ⁽⁴⁾ _PUCCH,RB RBs (that is, It can be determined as the PRB having the largest absolute frequency value, and when the RB allocation direction is indicated by OUTWARD, the RB _START induced by the RIV is the farthest (i.e., from the edge of the system bandwidth among N ⁽⁴⁾ _PUCCH,RB RBs). , which has the smallest absolute frequency value) may be determined as PRB.

Alternatively, the PUCCH resource index, the number of RBs for PUCCH transmission, and the resource allocation direction (also PUCCH format) may be dynamically indicated through the TPC or HRO field of the downlink DCI format. Such an example may be shown in Table 9 below (the PUCCH format may be indicated as in Table 6 or 7 in addition to Table 9 below).

As shown in Table 9 above, the PUCCH resource index, N _CRBs , and the direction indicator (also PUCCH format indicator) may be jointly encoded and indicated by the value of the TPC or HRO field.

또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 기초하여 PF4에 의해서 사용될 수 있는 RB 영역이 결정될 수 있고, RB 할당 방향 (INWARD 또는 OUTWARD) 및 PRB 개수 값(

)에 기초하여 PF4에 의해서 사용될 수 있는 RB 영역 내에서 PF4가 할당되는 RB가 결정될 수 있고, PF4 자원 인덱스(

)에 기초하여 PF4가 할당되는 슬롯을 결정하는 인자(m)가 결정될 수 있다. Accordingly, as in the examples of FIGS. 13 to 15,

Alternatively, the RB area that can be used by PF4 may be determined based on N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START , and the RB allocation direction (INWARD or OUTWARD) and the number of PRB values (

), the RB to which PF4 is allocated in the RB area that can be used by PF4 may be determined based on the PF4 resource index (

), a factor (m) for determining a slot to which PF4 is allocated may be determined.

)를 통해서 연산된 m (즉, 수학식 5에 따라 결정된 m) 값이 될 수 있다. 즉, RIV 값으로부터 유도되는 RB_START 없이, 기준 PRB 위치로부터 INWARD 또는 OUTWARD 방향으로

개의 PRB가 PF4를 위해 할당될 수 있다. Here, in the RB area usable by PF4, the reference PRB position where the RB allocation direction for PF4 starts is the indicated PUCCH resource index (

) may be a value of m calculated through Equation 5 (ie, m determined according to Equation 5). That is, in the INWARD or OUTWARD direction from the reference PRB position, without RB _START derived from the RIV value.

PRBs may be allocated for PF4.

또는 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지에 가장 가까운 (즉, 주파수 절대값이 가장 큰) PRB로 결정될 수 있고, RB 할당 방향이 OUTWARD인 경우에

또는 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지로부터 가장 먼 (즉, 주파수 절대값이 가장 작은) PRB로 결정될 수 있다. Alternatively, the starting point of the RB to which PF4 is allocated within the RB area usable by PF4 is when the RB allocation direction is INWARD.

Alternatively, it may be determined as the PRB closest to the edge of the system bandwidth (ie, the absolute frequency value is the largest) among N ⁽⁴⁾ _PUCCH,RB RBs, and when the RB allocation direction is OUTWARD

Alternatively, it may be determined as a PRB that is farthest from the edge of the system bandwidth (ie, has the smallest absolute frequency value) among N ⁽⁴⁾ _PUCCH,RB RBs.

)를 동적으로 지시할 수 있다. 하향링크 DCI 포맷 내의 TPC 또는 HRO 이외의 1 비트를 통해(예를 들어, 반송파 지시자, 자원 할당 헤더, 자원 블록 할당, MCS, HARQ 프로세스 번호, 신규데이터지시자(NDI), 리던던시 버전(RV), 또는 하향링크 할당 인덱스(DAI)과 같이 PDCCH DCI 내에 정의된 필드 중의 1 비트를 재사용하거나, 새롭게 정의되는 필드의 1 비트를 사용하여) 자원 할당 방향(예를 들어, INWARD 또는 OUTWARD)을 지시할 수도 있다. 이러한 예시는 아래의 표 10 및 표 11과 같이 나타낼 수 있다.Additionally, through the TPC or HRO field of the downlink DCI format, the PUCCH resource index, the number of RBs for PUCCH transmission (

) can be dynamically indicated. Through 1 bit other than TPC or HRO in the downlink DCI format (eg, carrier indicator, resource allocation header, resource block allocation, MCS, HARQ process number, new data indicator (NDI), redundancy version (RV), or A resource allocation direction (eg, INWARD or OUTWARD) may be indicated by reusing one bit of a field defined in PDCCH DCI, such as a downlink allocation index (DAI), or using one bit of a newly defined field. . Such an example can be shown as Table 10 and Table 11 below.

) 및 PF4 자원 할당에 대한 방향 지시자가 동적으로 지시되는 경우, 슬롯 인덱스 n _s에서 PF4를 위해서 사용되는 PRB 인덱스는 아래의 수학식 9에 따라서 결정될 수 있다.As described above, the number of RBs for PUCCH transmission (instead of not dynamically indicating RIV)

) and when the direction indicator for PF4 resource allocation is dynamically indicated, the PRB index used for PF4 in the slot index n _s may be determined according to Equation 9 below.

값은 방향지시자의 값으로서, INWARD이면 1 값을 가지고, OUTWARD이면 -1 값을 가질 수 있다. 즉, 지시된 PUCCH 자원인덱스를 통해서 연산된 m 값이 기준 PRB가 되고, 기준 PRB 위치로부터 INWARD 또는 OUTWARD 방향으로

개의 PRB가 PF4를 위해 할당(즉, 실제 PF4 전송을 위해 제어 정보가 매핑)될 수 있다.In Equation 9, m may be determined by Equation 5 above.

The value is the value of the direction indicator. If it is INWARD, it may have a value of 1, if it is OUTWARD, it may have a value of -1. That is, the m value calculated through the indicated PUCCH resource index becomes the reference PRB, and in the INWARD or OUTWARD direction from the reference PRB position.

PRBs may be allocated for PF4 (ie, control information is mapped for actual PF4 transmission).

)로부터 동적으로 시그널링될 수도 있다. 이 경우, 하향링크 DCI 포맷의 TPC 또는 HRO는 아래의 표 12와 같이 PF4 자원 인덱스(

)을 지시할 수 있다.Additionally, instead of N ⁽⁴⁾ _PUCCH,RB indicating the number of RBs that can be used by PF4 as in the above-described examples is set by the upper layer, the PF4 resource index (

) may be dynamically signaled from In this case, the TPC or HRO of the downlink DCI format is the PF4 resource index (

) can be indicated.

또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 기초하여 PF4에 의해서 사용될 수 있는 RB 영역이 결정될 수 있다. 여기서, PF4에 의해서 사용될 수 있는 영역 내에서, "하나의" PF4에 대해서 허용 가능한 크기(즉, "하나의" PF4에 의해서 사용될 수 있는 최대 RB 개수)를 결정하는 방안이 요구된다. In the above-described examples, it is set by the upper layer

Alternatively, an RB region that can be used by PF4 may be determined based on N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START . Here, a method of determining an allowable size for “one” PF4 (ie, the maximum number of RBs that can be used by “one” PF4) within an area usable by PF4 is required.

In the present invention, the maximum number of RBs that can be used by "one" PF4 (ie, n ⁽⁴⁾ _PUCCH,RBmax ) is the maximum value of the number of control information bits that can be transmitted through PF4 (eg, FDD may correspond to the maximum number of allocable RBs determined according to 64 bits in the case of , 128 bits in the case of TDD). For example, the value of n ⁽⁴⁾ _PUCCH,RBmax may be 3 RBs in the case of FDD and 6 RBs in the case of TDD. However, this is merely an example and is not limited thereto.

가 PF4 자원 인덱스(

) 및 n ⁽⁴⁾ _PUCCH,RBmax 으로부터 결정될 수 있다. 이러한 예시는 아래의 수학식 10과 같이 나타낼 수 있다.In this case, the number of RBs allocated for one PF4 (that is, to which control information is mapped for actual PF4 transmission) is

is the PF4 resource index (

) and n ⁽⁴⁾ _PUCCH,RBmax . Such an example can be expressed as Equation 10 below.

는 안테나 포트 인덱스

에 대한 PF4를 위해서 할당되는 RB 개수이다. In Equation 10 or Equation 11 above

is the antenna port index

It is the number of RBs allocated for PF4 for .

가 OCC 인덱스(

) 및 n ⁽⁴⁾ _PUCCH,RBmax 으로부터 결정될 수도 있다. 이러한 예시는 아래의 수학식 12 또는 수학식 13과 같이 나타낼 수 있다.In addition, the number of RBs allocated for PF4 (that is, to which control information is mapped for actual PF4 transmission) is

is the OCC index (

) and n ⁽⁴⁾ _PUCCH,RBmax . Such an example can be expressed as Equation 12 or Equation 13 below.

는 타입-1 PF4에 대한 OCC 인덱스 값에 해당할 수 있다. OCC는 하나의 PRB 내에서 복수의 PUCCH 전송을 다중화하기 위한 값이며, 아래의 수학식 14에 의해서 유도될 수 있다.In Equations 12 and 13,

may correspond to an OCC index value for type-1 PF4. OCC is a value for multiplexing a plurality of PUCCH transmissions within one PRB, and can be derived by Equation 14 below.

은 PF4 안테나 포트 인덱스

에 대한 첫 번째 슬롯(즉, 슬롯 인덱스 0)에서의 OCC 인덱스 값이고,

은 PF4 안테나 포트 인덱스

에 대한 두 번째 슬롯(즉, 슬롯 인덱스 1)에서의 OCC 인덱스 값이다.

값은 두 번째 슬롯의 확산 인자(spreading factor)의 값이며, 하나의 PRB에서 다중화할 수 있는 최대 값을 의미한다.

값은 노멀 CP 서브프레임에는 5이다. 만약 SRS 전송이 존재하는 서브프레임에서 짧은 포맷(shortened format)이 사용되는 경우에는

값은 4이다. 즉, 해당 서브프레임에서 SRS 전송 여부에 따라 하나의 PRB에서 최대 다중화 용량이 결정될 수 있다. In Equation 14 above

is the PF4 antenna port index

is the OCC index value in the first slot (ie, slot index 0) for

is the PF4 antenna port index

It is an OCC index value in the second slot (ie, slot index 1) for .

The value is the value of the spreading factor of the second slot, and means the maximum value that can be multiplexed in one PRB.

The value is 5 for the normal CP subframe. If a short format is used in a subframe in which SRS transmission exists,

The value is 4. That is, the maximum multiplexing capacity in one PRB may be determined according to whether SRS is transmitted in the corresponding subframe.

)를 통해서 연산된 m (즉, 수학식 5에 따라 결정된 m) 값이 될 수 있다. 즉, RIV 값으로부터 유도되는 RB_START 없이, 기준 PRB 위치로부터 INWARD 또는 OUTWARD 방향으로

개의 PRB가 PF4를 위해 할당될 수 있다. 또는, PF4에 의해서 사용될 수 있는 RB 영역 내에서 PF4가 할당되는 RB의 시작점은, RB 할당 방향이 INWARD인 경우에

또는 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지에 가장 가까운 (즉, 주파수 절대값이 가장 큰) PRB로 결정될 수 있고, RB 할당 방향이 OUTWARD인 경우에

또는 N ⁽⁴⁾ _PUCCH,RB 개의 RB 중에서 시스템 대역폭의 에지로부터 가장 먼 (즉, 주파수 절대값이 가장 작은) PRB로 결정될 수 있다. In the examples of Equations 10 to 13, the reference PRB position where the RB allocation direction for PF4 starts in the RB area usable by PF4 is the indicated PUCCH resource index (

) may be a value of m calculated through Equation 5 (ie, m determined according to Equation 5). That is, in the INWARD or OUTWARD direction from the reference PRB position, without RB _START derived from the RIV value.

PRBs may be allocated for PF4. Alternatively, the starting point of the RB to which PF4 is allocated within the RB area usable by PF4 is when the RB allocation direction is INWARD.

Alternatively, it may be determined as the PRB closest to the edge of the system bandwidth (ie, the absolute frequency value is the largest) among N ⁽⁴⁾ _PUCCH,RB RBs, and when the RB allocation direction is OUTWARD

Alternatively, it may be determined as a PRB that is farthest from the edge of the system bandwidth (ie, has the smallest absolute frequency value) among N ⁽⁴⁾ _PUCCH,RB RBs.

In the examples of Equations 10 to 13, positions of RB regions allocated for PF4 (ie, to which control information is mapped for actual PF4 transmission) may be determined differently from the reference PRB. In particular, in the examples of Equations 11 and 13, different RB regions may be determined according to the k value. The range of the k value may be {1,2,.., n ⁽⁴⁾ _{PUCCH, RBmax} -1 }, and the value may be set by a higher layer.

) 또는 OCC 인덱스 (

)에 기초하여 방향 지시자가 결정될 수도 있다. 이러한 예시는 아래의 수학식 15 및 수학식 16과 같이 나타낼 수 있다.In the above examples, when the direction indicator for RB allocation is not explicitly signaled, the PF4 resource index (

) or OCC index (

) based on the direction indicator may be determined. Such an example can be expressed as Equations 15 and 16 below.

등의 파라미터에 의해서 결정되는 PF4를 위해서 할당되는(즉, 실제 PF4 전송을 위해 제어 정보가 매핑되는) 자원의 위치 및 크기를 적절하게 제어하는 것이 필요하다. 구체적으로, PUCCH를 통하여 전송되는 제어 정보(예를 들어, HARQ-ACK, SR(있다면), 또는 HARQ-ACK, SR(있다면) 및 주기적 CSI)의 비트 수는 서브프레임마다 동적으로 변경될 수 있고, 또한 그 변경되는 폭이 클 수 있다. 따라서, PF4의 물리적 링크에 대한 신뢰성을 유지하기 위해서는 제어 정보의 비트 수에 따라서 PF4를 위해 할당되는 PRB 개수를 적응적으로 변경할 필요가 있다. In the foregoing examples of the present invention, RIV or

It is necessary to appropriately control the location and size of a resource allocated for PF4 determined by parameters such as PF4 (ie, to which control information is mapped for actual PF4 transmission). Specifically, the number of bits of control information (e.g., HARQ-ACK, SR (if any), or HARQ-ACK, SR (if any) and periodic CSI) transmitted through the PUCCH may be dynamically changed for each subframe and , and the width of the change may be large. Accordingly, in order to maintain reliability of the physical link of PF4, it is necessary to adaptively change the number of PRBs allocated for PF4 according to the number of bits of control information.

, 또는 PUCCH 자원 인덱스(

) 또는 OCC 인덱스 (

)에 의해서 유도되는

를 통해) 지시될 수 있다. 다만, 이는 단지 예시일 뿐이며, 만약 64 비트 보다 많은 양의 제어 정보를 PF4를 통해서 전송하는 것이 요구된다면, PF4에 의해서 사용가능한 RB의 개수는 3개 이상의 값을 가질 수도 있다. For example, PF3 transmits control information through one RB (one RB pair in one subframe), and the maximum number of bits is 22 bits. For channel coding of control information, a Reed Muller (RM) code may be used. For example, considering the output bit (ie, 48 bits) of the dual RM coder, one RB The code rate of the used PF3 becomes 22bit/48bit=0.458, and it can be said that this code rate is the reliability provided by the PF3. On the other hand, since the maximum number of control information bits that can be transmitted in FDD when eCA is applied is 64 bits, PF4 must use at least three RBs to achieve a code rate similar to that of PF3 (that is, 64/144 (=48*) 3) = 0.45) can be maintained. Therefore, according to the number of control information bits to be transmitted through PF4, the number of RBs used for PF4 should be dynamically determined from 1 to 3. Accordingly, for a terminal in which PF4 is configured, the number of RBs usable by PF4 (eg, n ⁽⁴⁾ _{PUCCH, RBmax} ) is set to 3 by a higher layer, and the sub that needs to transmit uplink control information Dynamically indicating that 1, 2, or 3 RBs are used per frame (eg, RIV indicated through TPC or HRO in the downlink DCI format,

, or PUCCH resource index (

) or OCC index (

) is induced by

) can be indicated. However, this is only an example, and if it is required to transmit more than 64 bits of control information through PF4, the number of RBs usable by PF4 may have three or more values.

16 is a diagram for explaining a method according to an exemplary embodiment of the present invention.

, N ⁽⁴⁾ _PUCCH,RB , 또는 N ⁽⁴⁾ _RB,START 에 해당할 수 있다. In step S1610, the terminal may receive the first information indicating the first resource region that can be used by the PF4 from the base station. Here, the first information may include a parameter set by higher layer signaling, and in the above examples,

, N ⁽⁴⁾ _{PUCCH, RB} , or N ⁽⁴⁾ _{RB, START} may correspond to

In step S1620, the terminal may receive the second information used to determine the second resource region to which PF4 is allocated from the base station. Here, the second information may include a parameter dynamically indicated through DCI (eg, through TPC, HRO or other field in the downlink DCI format), and in the above examples, RIV (RB _START from RIV) and L _CRBs can be derived), PUCCH format indicator (eg, information indicating PF3, PF4, type-1 PF4, or type-2 PF4), resource allocation direction indicator (eg, INWARD or OUTWARD) information indicating), the maximum number of PRBs that can be used for one PF4 (eg, n ⁽⁴⁾ _PUCCH,RBmax ), the number of PRBs to which one PF4 is allocated (eg, N _CRBs ), or these It may correspond to a parameter from which a value can be derived (eg, whether FDD/TDD is set, a PF4 resource index, or an OCC index). Among them, the maximum number of PRBs that can be used for one PF4 (eg, n ⁽⁴⁾ _PUCCH,RBmax ) may be indicated through higher layer signaling or a predetermined value may be applied.

In step S1630, the UE may determine a second resource region within the first resource region based on the first information and the second information.

In step S1640, the terminal may map the uplink control information to the determined second resource region and transmit it to the base station.

Although the above-described exemplary methods are expressed as a series of operations for the sake of brevity of description, this is not intended to limit the order in which the steps are performed, and if necessary, each step may be performed simultaneously or in a different order. In addition, not all illustrated steps are necessarily required for implementing the method according to the present invention.

The above-described embodiments include examples of various aspects of the present invention. It is not possible to describe every possible combination for representing the various aspects, but one of ordinary skill in the art will recognize that other combinations are possible. Accordingly, it is intended that the present invention cover all other substitutions, modifications and variations falling within the scope of the following claims.

The scope of the present invention includes an apparatus (eg, the wireless device and its components described with reference to FIG. 1 ) that processes or implements operations according to various embodiments of the present disclosure.

17 is a diagram for explaining the configuration of a processor according to the present invention.

The dynamic determination of the PUCCH format resource described in various examples of the present invention may be processed by the upper layer processing unit 111 and the physical layer processing unit 112 of the processor 110 of the terminal 100 .

, 또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 의해서 결정될 수 있다. 상기

는 PUCCH 포맷 2, 2a, 2b 또는 3에 의해서 사용될 수 있는 자원블록(RB) 개수를 나타내고, 상기 N ⁽⁴⁾ _PUCCH,RB 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB 개수를 나타내고, 상기 N ⁽⁴⁾ _RB,START 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB의 시작점을 나타낼 수 있다.Referring to FIG. 17 , the upper layer processing unit 111 may include a first resource region determining unit 1710 . The first resource region determiner 1710 may determine the first resource region based on the first information indicating the first resource region that can be used by the PUCCH. The first information may be provided to the terminal 100 through higher layer signaling (eg, RRC signaling). The first information indicating the first resource region,

, or may be determined by N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START . remind

denotes the number of resource blocks (RBs) that can be used by PUCCH format 2, 2a, 2b or 3, the N ⁽⁴⁾ _PUCCH,RB denotes the number of RBs that can be used by PUCCH format 4, and the N ⁽⁴ ) ⁾ _RB,START may indicate a starting point of an RB that can be used by PUCCH format 4.

The physical layer processor 112 may include a second resource region determiner 1720 and an uplink control information transmission signal generator 1730 .

The second resource region determiner 1720 is, in the first resource region determined by the first resource region determiner 2010 of the higher layer processing unit 111 (or in consideration of the first information), the PUCCH is allocated The second region may be determined based on the second information used to determine the second resource region. The second information may be dynamically indicated through the PDCCH DCI.

Here, the second resource region may correspond to a plurality of PRB pairs in one subframe. More specifically, the information indicating the second resource region may include one or more of RIV, PUCCH format indicator, and resource allocation direction indicator. RB _START and L _CRBs are derived from the RIV, and the RB _START is It may indicate the starting point of the second resource region, and the L _CRBS may indicate the number of consecutive RBs of the second resource region. Alternatively, the information indicating the second resource region may include at least one of N _CRBs , n ⁽⁴⁾ _{PUCCH, RBmax} , a PUCCH format indicator, or a resource allocation direction indicator. The n ⁽⁴⁾ _PUCCH,RBmax may indicate the maximum number of RBs that can be allocated to the second resource region, and the N _CRBs may indicate the number of consecutive RBs of the second resource region. The number of consecutive RBs in the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI. The resource allocation direction indicator of the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI. In addition, the information indicating the second resource region may be signaled by a transmit power control (TPC) command field of the DCI.

The uplink control information transmission signal generating unit 1730 may generate an uplink control information transmission signal by mapping the uplink control information to the second resource region dynamically determined by the second resource region determining unit 2020. have. The generated signal may be transmitted to the base station 200 through the transceiver 130 . In the present invention, the processor 110 maps the uplink control information to the second resource region determined based on the received first resource information and second resource information, and controls the mapping to be transmitted to the base station.

Dynamic allocation of PUCCH format resources described in various examples of the present invention may be processed by the upper layer processing unit 111 and the physical layer processing unit 112 of the processor 210 of the base station 200 .

, 또는 N ⁽⁴⁾ _PUCCH,RB 및 N ⁽⁴⁾ _RB,START 에 의해서 결정될 수 있다. 상기

는 PUCCH 포맷 2, 2a, 2b 또는 3에 의해서 사용될 수 있는 자원블록(RB) 개수를 나타내고, 상기 N ⁽⁴⁾ _PUCCH,RB 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB 개수를 나타내고, 상기 N ⁽⁴⁾ _RB,START 는 PUCCH 포맷 4에 의해서 사용될 수 있는 RB의 시작점을 나타낼 수 있다.Referring to FIG. 17 , the higher layer processing unit 211 may include a first resource region allocator 1740 . The first resource region allocator 1740 may generate first information indicating a first resource region that can be used by the PUCCH for transmission of uplink control information from the terminal 100 . The first information may be provided to the terminal 100 through higher layer signaling (eg, RRC signaling). The first information indicating the first resource region,

, or may be determined by N ⁽⁴⁾ _PUCCH,RB and N ⁽⁴⁾ _RB,START . remind

denotes the number of resource blocks (RBs) that can be used by PUCCH format 2, 2a, 2b or 3, the N ⁽⁴⁾ _PUCCH,RB denotes the number of RBs that can be used by PUCCH format 4, and the N ⁽⁴ ) ⁾ _RB,START may indicate a starting point of an RB that can be used by PUCCH format 4.

The physical layer processing unit 212 may include a second resource region allocator 1750 and an uplink control information check unit 1760 .

The second resource region allocator 1740 is, in the first resource region allocated by the first resource region allocator 1740 of the higher layer processing unit 211 (or in consideration of the first information), the PUCCH is allocated Second information used to determine the second resource region may be generated. The second information may be dynamically indicated through the PDCCH DCI.

Here, the second resource region may correspond to a plurality of PRB pairs in one subframe. More specifically, the information indicating the second resource region may include one or more of RIV, PUCCH format indicator, and resource allocation direction indicator. RB _START and L _CRBs are derived from the RIV, and the RB _START is It may indicate the starting point of the second resource region, and the L _CRBS may indicate the number of consecutive RBs of the second resource region. Alternatively, the information indicating the second resource region may include at least one of N _CRBs , n ⁽⁴⁾ _{PUCCH, RBmax} , a PUCCH format indicator, or a resource allocation direction indicator. The n ⁽⁴⁾ _PUCCH,RBmax may indicate the maximum number of RBs that can be allocated to the second resource region, and the N _CRBs may indicate the number of consecutive RBs of the second resource region. The number of consecutive RBs in the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI. The resource allocation direction indicator of the second resource region may be derived from a PUCCH resource index or an orthogonal cover code (OCC) index included in the DCI. In addition, the information indicating the second resource region may be signaled by a transmit power control (TPC) command field of the DCI.

The uplink control information confirmation unit 1760 may attempt to receive an uplink control information transmission signal through the PUCCH in the second resource region dynamically allocated by the second resource region allocator 1750 . In the present invention, the processor 210 predicts that the terminal maps the uplink control information in the second resource region determined based on the first resource information and the second resource information allocated to the terminal and transmits the mapping to the base station. In anticipation, reception of an uplink control information transmission signal may be attempted on the second resource region.

Also, the uplink control information check unit 1760 may check the received uplink control information. For example, the processor 210 of the base station 200 that has checked the HARQ-ACK information may determine whether to retransmit the corresponding downlink transmission, and the processor 210 of the base station 200 that has checked the SR information is the corresponding terminal ( 100) may perform uplink transmission scheduling, and the processor 210 of the base station 200 that has checked the CSI information may use the fed back channel state information for scheduling for the corresponding terminal 100.

The operation of the processor 110 of the terminal 100 or the processor 210 of the base station 200 may be implemented by software processing or hardware processing, or may be implemented by software and hardware processing. The scope of the present invention includes software (or operating system, application, firmware, program, etc.) that causes the operations according to various embodiments of the present invention to be executed on a device or computer, and stores such software and executes on the device or computer Including possible medium.

Although various embodiments of the present invention have been described focusing on 3GPP LTE or LTE-A systems, they may be applied to various mobile communication systems.

Claims (8)

A method for a terminal to transmit uplink control information in a wireless communication system, the method comprising:
At least one or more configuration information including information on the number of resource blocks that can be used in PUCCH transmission based on a physical uplink control channel (PUCCH) resource index. Radio resource control (radio resource) control, RRC) receiving a setting from the base station through the layer;
Receiving downlink control information (DCI) indicating first configuration information among the at least one or more configuration information from the base station;
At least one resource block for transmitting the uplink control information is determined based on the PUCCH resource index indicated on the basis of the first configuration information and the number of resource blocks used in PUCCH transmission, and the uplink control information is mapped to the A method of transmitting uplink control information, comprising: transmitting to a base station, wherein the first configuration information is indicated through a transmission power control (TPC) command field of the DCI.
The method of claim 1,
The PUCCH resource index is

In, uplink control information transmission method.
The method of claim 1,
Based on the PUCCH resource index, the location of the resource block from which the PUCCH transmission starts is included in the at least one or more configuration information, the method for transmitting uplink control information.
delete The method according to claim 1, wherein the uplink control information comprises a hybrid automatic repeat request-acknowledgement (HARQ-ACK), a scheduling request (SR), and one or more periodic channel state information (channel state). information, CSI) report, characterized in that it comprises a, uplink control information transmission method.
6. The method of claim 5,
The one or more periodic CSI reports are multiplexed on PUCCH with HARQ-ACK and SR, and are transmitted in one time transmission interval on a PUCCH serving cell.
The method of claim 1,
If the total number of bits corresponding to HARQ-ACK, SR, and one or more CSIs does not exceed 128, PUCCH format 4 and PUCCH resources

Uplink control information transmission method, characterized in that using.
The method of claim 1,
If the total number of bits corresponding to spatially bundled HARQ-ACK, SR, and one or more CSIs does not exceed 128, PUCCH format 4 and PUCCH resources

Uplink control information transmission method, characterized in that using.

Images