WO2018203686A1

WO2018203686A1 - Method for transmitting and receiving scheduling request between terminal and base station in wireless communication system and device for supporting same

Info

Publication number: WO2018203686A1
Application number: PCT/KR2018/005149
Authority: WO
Inventors: 박한준; 김선욱; 안준기; 양석철
Original assignee: 엘지전자 주식회사
Priority date: 2017-05-03
Filing date: 2018-05-03
Publication date: 2018-11-08

Abstract

Disclosed are a method for transmitting and receiving a scheduling request between a terminal and a base station in a wireless communication system and a device for supporting the same.

Description

Method for transmitting / receiving scheduling request between a terminal and a base station in a wireless communication system and an apparatus supporting the same

The following description relates to a wireless communication system, and a method for transmitting and receiving a scheduling request between a terminal and a base station in a wireless communication system and an apparatus supporting the same.

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

In addition, as more communication devices require larger communication capacities, there is a need for improved mobile broadband communication as compared to conventional radio access technology (RAT). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere, is also being considered in next-generation communications. In addition, a communication system design considering a service / UE that is sensitive to reliability and latency is being considered.

The introduction of the next generation of RAT considering the improved mobile broadband communication, Massif MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is being discussed.

An object of the present invention is to provide a method for transmitting and receiving a scheduling request between a terminal and a base station in a wireless communication system and apparatuses supporting the same.

Technical objects to be achieved in the present invention are not limited to the above-mentioned matters, and other technical problems not mentioned above are provided to those skilled in the art from the embodiments of the present invention to be described below. May be considered.

The present invention provides a method for transmitting and receiving a scheduling request between a terminal and a base station in a wireless communication system and apparatuses supporting the same.

In one aspect of the present invention, a method for transmitting a scheduling request (SR) by a terminal to a base station in a wireless communication system, the first configuration information for one or more first uplink resources for the SR transmission from the base station Receiving second configuration information on a second uplink resource for transmitting uplink control information (UCI); And a bit indicating SR information for N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain. And transmitting information in the second uplink resource together with the UCI.

Here, the first configuration information may be received through higher layer signaling.

In addition, the second configuration information may be received through downlink control information (DCI).

Here, the bit information indicating the SR information for the N SR configuration may indicate information about one SR configuration among the N SR configuration and positive SR information corresponding to the one SR configuration. .

Alternatively, the bit information indicating the SR information for the N SR settings may include a plurality of bits indicating whether the SR information corresponding to each of the N SR settings is a positive SR or a negative SR. It may consist of bits.

In this case, each of the plurality of bits may have a value of 1 when the corresponding SR information is a positive SR and a value of 0 when the corresponding SR information is a negative SR.

In addition, the plurality of bits may be configured in an order based on identification information of the N SR settings.

In the above configuration, the N first uplink resources and the second uplink resource may overlap all or part of the time domain.

In this case, the second uplink resource may correspond to a physical uplink control channel (PUCCH) resource for transmitting the UCI.

In addition, the bit information may be transmitted in the second uplink resource in a coded bits format generated in combination with the UCI.

In the above configuration, the UCI may include channel state information (CSI) or Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information.

In another aspect of the present invention, a method for receiving a scheduling request (SR) from a terminal by a base station in a wireless communication system, the first configuration information for one or more first uplink resources for SR transmission to the terminal; Transmitting second configuration information for a second uplink resource for transmitting uplink control information (UCI); And a bit indicating SR information for N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain. And receiving information in the second uplink resource together with the UCI.

In another aspect of the present invention, a terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system, the terminal comprising: a receiving unit; A transmitter; And a processor operatively connected to the receiver and the transmitter, the processor comprising: first configuration information and uplink control information for one or more first uplink resources for SR transmission from the base station; Receiving second configuration information for a second uplink resource transmitting UCI); And a bit indicating SR information for N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain. The terminal is configured to transmit information in the second uplink resource together with the UCI.

In another aspect of the present invention, a base station for receiving a scheduling request (SR) from a terminal in a wireless communication system, comprising: a receiving unit; A transmitter; And a processor operating in connection with the receiver and the transmitter, wherein the processor comprises: first configuration information and uplink control information for one or more first uplink resources for SR transmission to the terminal; Transmitting second configuration information for a second uplink resource transmitting UCI); And a bit indicating SR information for N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain. And a base station configured to receive information in the second uplink resource together with the UCI.

In another aspect of the present invention, a method for transmitting a scheduling request (SR) by a terminal to a base station in a wireless communication system, the method comprising: a first physical uplink control channel (PUCCH) for transmitting SR information; Determine a second PUCCH format for transmitting the format and HARQ-ACK (Hybrid Automatic Repeat request Acknowledge) information; And a first PUCCH format consisting of one or two symbols and corresponding to a PUCCH format supporting uplink control information (UCI) of up to two bits in size, wherein the second PUCCH format is four or more symbols. It corresponds to a PUCCH format that supports a UCI of up to 2 bits in size, and when the SR information is a positive SR, the SR information by transmitting only the HARQ-ACK information using the second PUCCH format And the simultaneous transmission of the HARQ-ACK information; proposes a scheduling request transmission method comprising a.

Here, when the first uplink resource for transmitting the SR information and the second uplink resource for transmitting the HARQ-ACK information overlap in a time domain, simultaneous transmission of the SR information and the HARQ-ACK information may be performed. Can be.

In another aspect of the present invention, a terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system, the terminal comprising: a receiving unit; A transmitter; And a processor operatively connected to the receiver and the transmitter, wherein the processor comprises: a first physical uplink control channel (PUCCH) format and a HARQ-ACK (Hybrid Automatic Repeat request) for transmitting SR information; Determine a second PUCCH format for transmitting Acknowledge information; And a first PUCCH format consisting of one or two symbols and corresponding to a PUCCH format supporting uplink control information (UCI) of up to two bits in size, wherein the second PUCCH format is four or more symbols. It corresponds to a PUCCH format that supports a UCI of up to 2 bits in size, and when the SR information is a positive SR, the SR information by transmitting only the HARQ-ACK information using the second PUCCH format And to perform simultaneous transmission of the HARQ-ACK information.

The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be described in detail by those skilled in the art. Based on the description, it can be derived and understood.

According to embodiments of the present invention has the following effects.

According to the present invention, when a first uplink resource for transmitting a plurality of scheduling request information and a second uplink resource for transmitting acknowledgment information overlap in a time domain, a terminal corresponds to a bit corresponding to the plurality of scheduling request information. Information may be transmitted in the second uplink resource together with the acknowledgment information.

Accordingly, the terminal may adaptively transmit the plurality of scheduling request information according to a situation.

Effects obtained in the embodiments of the present invention are not limited to the above-mentioned effects, and other effects not mentioned above are commonly known in the art to which the present invention pertains from the description of the embodiments of the present invention. Can be clearly derived and understood by those who have In other words, unintended effects of practicing the present invention may also be derived by those skilled in the art from the embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to facilitate understanding of the present invention, and provide embodiments of the present invention together with the detailed description. However, the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment. Reference numerals in each drawing refer to structural elements.

1 is a diagram illustrating a physical channel and a signal transmission method using the same.

2 is a diagram illustrating an example of a structure of a radio frame.

3 is a diagram illustrating a resource grid for a downlink slot.

4 is a diagram illustrating an example of a structure of an uplink subframe.

5 is a diagram illustrating an example of a structure of a downlink subframe.

FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.

7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element.

9 is a diagram illustrating a hybrid beamforming structure from a TXRU and a physical antenna perspective according to an example of the present invention.

FIG. 10 is a diagram briefly illustrating a beam sweeping operation of a synchronization signal and system information in a downlink (DL) transmission process according to an embodiment of the present invention.

11 is a diagram illustrating a third SR transmission method according to an embodiment of the present invention.

12 is a diagram briefly illustrating an SR transmission method of a terminal when an SR has a higher priority than an HARQ-ACK according to the present invention.

13 and 14 illustrate a method for transmitting an SR of a terminal when HARQ-ACK has a higher priority than an SR according to the present invention.

15 is a flowchart illustrating a method for transmitting a scheduling request by a terminal according to the present invention.

16 is a diagram illustrating a configuration of a terminal and a base station in which the proposed embodiments can be implemented.

The following embodiments combine the components and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, some of the components and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment.

In the description of the drawings, procedures or steps which may obscure the gist of the present invention are not described, and procedures or steps that can be understood by those skilled in the art are not described.

Throughout the specification, when a part is said to "comprising" (or including) a component, this means that it may further include other components, except to exclude other components unless specifically stated otherwise. do. In addition, the terms "... unit", "... group", "module", etc. described in the specification mean a unit for processing at least one function or operation, which is hardware or software or a combination of hardware and software. It can be implemented as. Also, "a or an", "one", "the", and the like are used differently in the context of describing the present invention (particularly in the context of the following claims). Unless otherwise indicated or clearly contradicted by context, it may be used in the sense including both the singular and the plural.

In the present specification, embodiments of the present invention have been described based on data transmission / reception relations between a base station and a mobile station. Here, the base station is meant as a terminal node of a network that directly communicates with a mobile station. The specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station. In this case, the 'base station' is replaced by terms such as a fixed station, a Node B, an eNode B (eNB), a gNode B (gNB), an advanced base station (ABS), or an access point. Can be.

Further, in embodiments of the present invention, a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), or a mobile subscriber station (MSS). It may be replaced with terms such as a mobile terminal or an advanced mobile station (AMS).

Also, the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service, and the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of wireless access systems IEEE 802.xx system, 3rd Generation Partnership Project (3GPP) system, 3GPP LTE system, 3GPP 5G NR system and 3GPP2 system In particular, embodiments of the present invention include 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.331, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321 and 3GPP TS 38.331 documents Can be supported by That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

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

For example, the term Transmission Opportunity Period (TxOP) may be used in the same meaning as the term transmission period, transmission burst (Tx burst) or RRP (Reserved Resource Period). Also, the LBT process may be performed for the same purpose as a carrier sensing process, a clear channel assessment (CCA), and a channel access procedure (CAP) for determining whether a channel state is idle.

Hereinafter, a 3GPP NR system as well as a 3GPP LTE / LTE-A system will be described as an example of a wireless access system in which embodiments of the present invention can be used.

The following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be applied to various radio access systems.

CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).

UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. The LTE-A (Advanced) system is an improved system of the 3GPP LTE system.

In order to clarify the description of the technical features of the present invention, embodiments of the present invention are described not only for the 3GPP LTE / LTE-A system but also for the 3GPP NR system, but may also be applied to the IEEE 802.16e / m system.

1. 3GPP1.3GPP LTELTE /Of LTELTE _A 시스템_A system

1.1 물리 채널들 및 이를 이용한 신호 송수신 방법1.1 Physical Channels and Signal Transmission / Reception Method Using the Same

In a wireless access system, a terminal receives information from a base station through downlink (DL) and transmits information to the base station through uplink (UL). The information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information they transmit and receive.

1 is a diagram for explaining physical channels that can be used in embodiments of the present invention and a signal transmission method using the same.

When the power is turned off again or a new cell enters the cell, the initial cell search operation such as synchronizing with the base station is performed in step S11. To this end, the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.

Thereafter, the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information in a cell.

On the other hand, the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to confirm the downlink channel state.

After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S12. Specific system information can be obtained.

Subsequently, the terminal may perform a random access procedure as in steps S13 to S16 to complete the access to the base station. To this end, the UE transmits a preamble through a physical random access channel (PRACH) (S13), a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S14). In case of contention-based random access, the UE may perform contention resolution such as transmitting an additional physical random access channel signal (S15) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S16). Procedure).

After performing the above-described procedure, the UE subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S17) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure. A transmission (Uplink Shared Channel) signal and / or a Physical Uplink Control Channel (PUCCH) signal may be transmitted (S18).

The control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK (HARQ-ACK / NACK), Scheduling Request (SR), Channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI) information. .

In the LTE system, UCI is generally transmitted periodically through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time. In addition, the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.

1.2. 자원 구조1.2. Resource structure

2 shows a structure of a radio frame used in embodiments of the present invention.

2 (a) shows a frame structure type 1. The type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) systems and half duplex FDD systems.

One radio frame is T _f = 307200 * T _s It has a length of 10 ms, T _slot = 15360 * T _s = 0.5 ms, and has an equal length of 20 slots indexed from 0 to 19. One subframe is defined as two consecutive slots, and the i-th subframe includes slots corresponding to 2i and 2i + 1. That is, a radio frame consists of 10 subframes. The time taken to transmit one subframe is called a transmission time interval (TTI). Here, T _s represents a sampling time and is represented by T _s = 1 / (15 kHz x 2048) = 3.2552 x 10 ^-8 (about 33 ns). The slot includes a plurality of OFDM symbols or SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.

One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Since 3GPP LTE uses OFDMA in downlink, the OFDM symbol is for representing one symbol period. The OFDM symbol may be referred to as one SC-FDMA symbol or symbol period. A resource block is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.

In a full-duplex FDD system, 10 subframes may be used simultaneously for downlink transmission and uplink transmission during each 10ms period. At this time, uplink and downlink transmission are separated in the frequency domain. On the other hand, in the case of a half-duplex FDD system, the terminal cannot transmit and receive at the same time.

The structure of the radio frame described above is just one example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.

2 (b) shows a frame structure type 2. Type 2 frame structure is applied to the TDD system. One radio frame is T _f = 307200 * T _s = having a length of 10ms and is composed of 153600 * T _s = 2 two half-frames (half-frame) having a 5ms length. Each half frame consists of five subframes having a length of 30720 * T _s = 1 ms. The i th subframe consists of two slots having a length of T _slot = 15360 * T _s = 0.5 ms corresponding to 2 _i and 2 _i ₊₁ . Here, T _s represents a sampling time and is represented by T _s = 1 / (15 kHz x 2048) = 3.2552 x 10 ^-8 (about 33 ns).

The type 2 frame includes a special subframe consisting of three fields: a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). Here, the DwPTS is used for initial cell search, synchronization or channel estimation in the terminal. UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal. The guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.

Table 1 below shows the structure of the special frame (length of DwPTS / GP / UpPTS).

In addition, in the LTE Rel-13 system, the configuration of a special frame (the length of DwPTS / GP / UpPTS) is provided by X (the number of additional SC-FDMA symbols and the upper layer parameter srs-UpPtsAdd) as shown in the following table. Otherwise, X is equal to 0), and a new configuration is added, and Special subframe configuration # 10 is newly added in the LTE Rel-14 system. Here, the UE adds two additional UpPTSs for special subframeconfigurations {3, 4, 7, 8} for general CP in downlink and special subframeconfigurations {2, 3, 5, 6} for extended CP in downlink. You may not expect SC-FDMA symbols to be set. In addition, the UE has special subframeconfigurations {1, 2, 3, 4, 6, 7, 8} for general CP in downlink and special subframeconfigurations {1, 2, 3, 5 for extended CP in downlink May not expect four additional UpPTS SC-FDMA symbols to be set. (The UE is not expected to be configured with 2 additional UpPTS SC-FDMA symbols for special subframeconfigurations {3, 4, 7, 8} for normal cyclic prefix in downlink and special subframeconfigurations {2, 3, 5, 6} for extended cyclic prefix in downlink and 4 additional UpPTS SC-FDMA symbols for special subframeconfigurations {1, 2, 3, 4, 6, 7, 8} for normal cyclic prefix in downlink and special subframeconfigurations {1, 2, 3, 5, 6} for extended cyclic prefix in downlink.)

3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.

Referring to FIG. 3, one downlink slot includes a plurality of OFDM symbols in the time domain. Here, one downlink slot includes seven OFDM symbols, and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.

Each element on the resource grid is a resource element, and one resource block includes 12 × 7 resource elements. The number NDL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth.

4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.

Referring to FIG. 4, an uplink subframe may be divided into a control region and a data region in the frequency domain. The control region is allocated a PUCCH carrying uplink control information. In the data area, a PUSCH carrying user data is allocated. In order to maintain a single carrier characteristic, one UE does not simultaneously transmit a PUCCH and a PUSCH. The PUCCH for one UE is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots. The RB pair assigned to this PUCCH is said to be frequency hopping at the slot boundary.

5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.

Referring to FIG. 5, up to three OFDM symbols from the OFDM symbol index 0 in the first slot in the subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which the PDSCH is allocated. )to be. One example of a downlink control channel used in 3GPP LTE includes a Physical Control Format Indicator Channel (PCFICH), a PDCCH, and a Physical Hybrid-ARQ Indicator Channel (PHICH).

The PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels within the subframe. The PHICH is a response channel for the uplink and carries an ACK (Acknowledgement) / NACK (Negative-Acknowledgement) signal for a hybrid automatic repeat request (HARQ). Control information transmitted through the PDCCH is called downlink control information (DCI). The downlink control information includes uplink resource allocation information, downlink resource allocation information or an uplink transmission (Tx) power control command for a certain terminal group.

2. 새로운 무선 접속 기술 (New Radio Access Technology) 시스템2. New Radio Access Technology System

As more communication devices demand greater communication capacity, there is a need for improved mobile broadband communication as compared to conventional radio access technology (RAT). There is also a need for Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere. In addition, a design of a communication system considering a service / UE that is sensitive to reliability and latency has been presented.

A new wireless access technology system has been proposed as a new wireless access technology that considers such enhanced mobile broadband communication, massive MTC, and ultra-reliable and low latency communication (URLLC). Hereinafter, in the present invention, the technology is referred to as New RAT or NR (New Radio) for convenience.

2.1.2.1. 뉴머롤로지들Numerology ( ( NumeriologiesNumeriologies ))

The NR system to which the present invention is applicable supports various OFDM neurology as shown in the following table. In this case, μ and cyclic prefix information for each carrier bandwidth part may be signaled for each downlink (DL) or uplink (UL). For example, μ and cyclic prefix information for a downlink carrier bandwidth part may be signaled through higher layer signaling DL-BWP-mu and DL-MWP-cp. As another example, μ and cyclic prefix information for an uplink carrier bandwidth part may be signaled through higher layer signaling UL-BWP-mu and UL-MWP-cp.

2.2. 프레임 구조2.2. Frame structure

Downlink and uplink transmission consists of a frame of 10ms long. The frame may be composed of 10 subframes of length 1ms. In this case, the number of consecutive OFDM symbols for each subframe is

to be.

Each frame may consist of two equally sized half frames. In this case, each half-frame may be configured of subframes 0-4 and subframes 5-9, respectively.

For subcarrier spacing μ, slots are in ascending order within one subframe.

Numbered as in ascending order within a frame

It may be numbered as follows. In this case, the number of consecutive OFDM symbols in one slot (

) Can be determined according to the circulation translocation as shown in the table below. Start slot in one subframe (

) Is the starting OFDM symbol () in the same subframe

) And time dimension. Table 4 shows the number of OFDM symbols per slot / frame / subframe for a normal cyclic prefix, and Table 5 shows slots / frame / for extended cyclic prefix. This indicates the number of OFDM symbols per subframe.

In the NR system to which the present invention is applicable, a self-contained slot structure may be applied as the slot structure as described above.

6 is a diagram illustrating a self-contained slot structure applicable to the present invention.

In FIG. 6, a hatched area (eg, symbol index = 0) represents a downlink control area, and a black area (eg, symbol index = 13) represents an uplink control area. The other area (eg, symbol index = 1 to 12) may be used for downlink data transmission or may be used for uplink data transmission.

According to this structure, the base station and the UE may sequentially perform DL transmission and UL transmission in one slot, and may transmit and receive DL data and transmit and receive UL ACK / NACK for the DL data in the one slot. As a result, this structure reduces the time taken to retransmit data in the event of a data transmission error, thereby minimizing the delay of the final data transfer.

In this independent slot structure, a time gap of a certain length is required for the base station and the UE to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode. To this end, some OFDM symbols at the time of switching from DL to UL in the independent slot structure may be set to a guard period (GP).

In the above detailed description, the case in which the independent slot structure includes both the DL control region and the UL control region is described. However, the control regions may be selectively included in the independent slot structure. In other words, the independent slot structure according to the present invention may include not only a case in which both the DL control region and the UL control region are included as shown in FIG. 6, but also a case in which only the DL control region or the UL control region is included.

For example, a slot may have various slot formats. In this case, the OFDM symbol of each slot may be classified into downlink (denoted 'D'), flexible (denoted 'X'), and uplink (denoted 'U').

Therefore, in the downlink slot, the UE may assume that downlink transmission occurs only in 'D' and 'X' symbols. Similarly, in the uplink slot, the UE may assume that uplink transmission occurs only in the 'U' and 'X' symbols.

2.3. 아날로그 2.3. analog 빔포밍Beamforming (Analog (Analog beamformingbeamforming ))

In millimeter wave (mmW), the short wavelength allows the installation of multiple antenna elements in the same area. That is, since the wavelength is 1 cm in the 30 GHz band, a total of 100 antenna elements can be installed in a 2-dimension array at 0.5 lambda intervals on a 5 * 5 cm panel. Accordingly, in millimeter wave (mmW), a plurality of antenna elements may be used to increase beamforming (BF) gain to increase coverage or to increase throughput.

In this case, each antenna element may include a TXRU (Transceiver Unit) to enable transmission power and phase adjustment for each antenna element. Through this, each antenna element may perform independent beamforming for each frequency resource.

However, in order to install TXRU in all 100 antenna elements, there is a problem in terms of cost effectiveness. Therefore, a method of mapping a plurality of antenna elements to a single TXRU and adjusting a beam direction with an analog phase shifter is considered. This analog beamforming method has a disadvantage in that frequency selective beamforming is difficult because only one beam direction can be made in the entire band.

As a solution to this problem, a hybrid BF having B TXRUs having a smaller number than Q antenna elements may be considered as an intermediate form between digital beamforming and analog beamforming. In this case, although there are differences depending on the connection scheme of the B TXRU and the Q antenna elements, the direction of the beam that can be transmitted at the same time may be limited to B or less.

7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element. Here, the TXRU virtualization model represents the relationship between the output signal of the TXRU and the output signal of the antenna element.

FIG. 7 is a diagram illustrating how a TXRU is connected to a sub-array. In the case of FIG. 7, the antenna element is connected to only one TXRU.

8 shows how TXRU is connected to all antenna elements. In the case of FIG. 8, the antenna element is connected to all TXRUs. At this time, the antenna element requires a separate adder as shown in FIG. 8 to be connected to all TXRUs.

In Figures 7 and 8, W represents the phase vector multiplied by an analog phase shifter. In other words, W is a main parameter that determines the direction of analog beamforming. Here, the mapping between the CSI-RS antenna port and the TXRUs may be 1: 1 or 1: 1-to-many.

According to the configuration of FIG. 7, the beamforming focusing is difficult, but there is an advantage that the entire antenna configuration can be configured at a low cost.

According to the configuration of FIG. 8, there is an advantage in that focusing of the beamforming is easy. However, since the TXRU is connected to all antenna elements, the overall cost increases.

When a plurality of antennas are used in an NR system to which the present invention is applicable, a hybrid beamforming technique combining digital beamforming and analog beamforming may be applied. At this time, analog beamforming (or RF (Radio Frequency) beamforming) refers to an operation of performing precoding (or combining) in the RF stage. In the hybrid beamforming, the baseband stage and the RF stage respectively perform precoding (or combining). This reduces the number of RF chains and the number of digital-to-analog (D / A) (or analog-to-digital) converters while providing near-digital beamforming performance.

For convenience of description, the hybrid beamforming structure may be represented by N transceiver units (TXRUs) and M physical antennas. In this case, the digital beamforming for the L data layers to be transmitted by the transmitter may be represented by an N * L (N by L) matrix. Thereafter, the converted N digital signals are converted into analog signals through TXRU, and analog beamforming is applied to the converted signals represented by an M * N (M by N) matrix.

9 is a diagram illustrating a hybrid beamforming structure from a TXRU and a physical antenna perspective according to an example of the present invention. In this case, the number of digital beams is L and the number of analog beams is N in FIG. 9.

In addition, in the NR system to which the present invention is applicable, the base station is designed to change the analog beamforming in units of symbols and considers a method for supporting more efficient beamforming for a terminal located in a specific region. Furthermore, when defining specific N TXRU and M RF antennas as one antenna panel as shown in FIG. 9, in the NR system according to the present invention, a plurality of antenna panels to which hybrid beamforming independent of each other can be applied are defined. It is also considered to adopt.

When the base station utilizes a plurality of analog beams as described above, the analog beams advantageous for signal reception may be different for each terminal. Accordingly, in the NR system to which the present invention is applicable, the base station transmits a signal (at least a synchronization signal, system information, paging, etc.) by applying a different analog beam for each symbol in a specific subframe (SF) so that all terminals can receive the signal. Beam sweeping operations are being contemplated that allow for receiving opportunities.

In FIG. 10, a physical resource (or physical channel) through which system information of an NR system to which the present invention is applicable is transmitted in a broadcasting manner is referred to as a physical broadcast channel (xPBCH). In this case, analog beams belonging to different antenna panels in one symbol may be transmitted simultaneously.

In addition, as shown in FIG. 10, in the NR system to which the present invention is applicable, a configuration for measuring channels for analog beams is applied to transmit a reference signal (Reference signal, The introduction of beam reference signals (Beam RS, BRS), which is RS, is under discussion. The BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam. At this time, unlike the BRS, the synchronization signal or the xPBCH may be transmitted by applying all the analog beams in the analog beam group so that any terminal can receive well.

3. 제안하는 3. offered 실시예Example

Hereinafter, the configuration proposed by the present invention will be described in more detail based on the technical spirit as described above.

In particular, the present invention will be described in detail with respect to a method for transmitting a SR (scheduling request) requesting UL data scheduling to the base station.

In a wireless communication system, a base station (or network) controls not only DL data transmission but also UL data transmission of a terminal. The terminal is allocated a physical uplink shared channel (PUSCH), which is a physical channel for UL data transmission, from a base station (or network) for UL data transmission. Subsequently, the base station (or network) may schedule UL data transmission through a specific PUSCH to the UE through downlink control information (DCI) called UL grant.

In this case, the base station (or the network may not know whether there is UL data (or UL traffic) to be transmitted by the terminal.) Therefore, a method of requesting UL data scheduling by the terminal first needs to be supported.

As a method for this, the terminal may transmit a UL scheduling request message (hereinafter, referred to as SR (scheduling request)) including UL data traffic to a base station (or network). For example, the UE may transmit the SR on PUCCH, which is a physical channel for uplink control information (UCI) transmission purpose. The PUCCH including the SR may be transmitted in a time resource and a frequency resource set by the base station (or network) as a higher layer signal.

Meanwhile, the NR system to which the present invention is applicable may support a plurality of logical networks in a single physical system, and have various requirements (eg, enhanced Mobile BroadBand (eMBB), massive machine type communication (MMTC), and URLLC (Ultra)). Reliable and Low Latency Communication).

For example, a PUCCH, which is a physical channel for UCI transmission, is composed of a relatively large number of OFDM symbols (for example, 4 symbols or more), and supports PUCCH (hereinafter, referred to as Long PUCCH) and relatively few OFDM symbols (for example, 1 unit) to support a wide UL coverage. Or two symbols) may be configured as a PUCCH (hereinafter referred to as Short PUCCH) to support low latency transmission.

The Short PUCCH may have one or more transmission structures. For example, when the amount of information of the uplink control information (UCI) to be transmitted in the short PUCCH is small (for example, 1 or 2 bits), the base station allocates a sequence set composed of a plurality of sequences to the terminal as a short PUCCH resource. The UE may select and transmit a specific sequence corresponding to the UCI information to be transmitted among the sequences allocated as the Short PUCCH resource. In this case, the sequence may be designed to satisfy a low peak power to average power ratio (PAPR) characteristic. Hereinafter, for convenience of description, such a sequence-based Short PUCCH structure will be referred to as SEQ-PUCCH.

On the other hand, if there is a large amount of information of the UCI to be transmitted in the Short PUCCH (for example, 3 bits or more), the base station is composed of a short (RE) for transmitting the UCI to the UE and a RE for transmitting a reference signal (RS) PUCCH resources can be allocated. In this case, the RS transmission RE and the UCI transmission RE may be classified according to a frequency division multiplexing (FDM) scheme for each symbol. Accordingly, the terminal may generate coded bits for UCI and then transmit modulation symbols for the coded bits through REs for transmitting the UCI. Hereinafter, for convenience of description, the short PUCCH structure to which the FDM scheme between RSs and UCIs (per symbol) is applied as FDM-PUCCH as described above.

Hereinafter, the SR transmission method of the UE using the Short PUCCH and Long PUCCH as described above will be described in detail. In the following description, the operation according to the present invention will be described in detail with operations of a terminal and a base station in an NR system. However, the methods proposed in the present invention can be equally applied to a general wireless communication system.

Hereinafter, in the present invention, a DM-RS (demodulation reference signal) refers to a data demodulation reference signal, a SRS (sounding reference signal) refers to a reference signal for UL channel measurement, ACK / NACK is a confirmation of the data decoding result Response information, and CSI (channel state information) means feedback information on the channel measurement results. In addition, a CS (cyclic shift) resource for a specific sequence means a resource to which a Cyclic time shift (or Cyclic frequency shift) is applied on a time axis (or frequency axis) for the sequence, and a root index is a sequence generation. It means the seed value used at the time.

In addition, in the present invention, a physical resource block (PRB) may mean a frequency axis resource allocation unit.

3.1 제1 SR 전송 방법3.1 First SR Transmission Method

The base station may set a (potential) time resource (or slot set) for SR transmission to the terminal in one or more of the following ways.

(1) set in the manner promised in advance

(2) Set via broadcast channel or system information

(3) set via (terminal specific) upper layer signals

Correspondingly, the terminal may determine whether to actually transmit the SR in one or more of the following methods (potential) time resource (or slot set) for the SR transmission.

1) Send SR without confirmation

In this case, the terminal may perform the operation only for a time resource (or slot) set through a predetermined method or a broadcast channel or system information.

2) SR transmission only if SR transmission is allowed through Group-common PDCCH in time resource (or slot)

In this case, the terminal may perform the operation only for a time resource (or slot) set through a (terminal specific) higher layer signal.

Here, the group common PDCCH means a physical transport channel of DL control information for a plurality of UE groups.

The resource allocation and the signal transmission method based on the same may be equally applied to (Periodic) SRS transmission.

More specifically, the NR system according to the present invention may support DL or UL data transmission in a slot unit defined in the time axis. In this case, the NR system minimizes the use of a slot capable of transmitting only DL data (hereinafter, fixed DL slot) or a slot capable of transmitting only UL data (hereinafter, fixed UL slot) to support flexible scheduling according to data traffic. May be applied.

Therefore, if (periodical) SR transmission is allowed only in fixed UL slots, the time resource for transmitting the SR in the UE is relatively small and the SR transmission period becomes long. Such an operation may be undesirable in terms of latency of the terminal.

In order to solve the above problem, in addition to the fixed UL slot, a slot that can be flexibly switched for DL / UL data transmission purposes (hereinafter, a flexible DL / UL slot) may be supported for SR transmission.

However, when the base station configures the terminal to potentially set the SR transmission slot, the terminal determines whether the SR transmission is allowed for the flexible DL / UL slot other than the fixed UL slot (in the potential SR transmission slot set). I can't be sure.

Accordingly, the base station may indicate to the terminal through the group common PDCCH whether the actual SR transmission is allowed for a particular slot in the potential set of SR transmission slots. For example, the base station indicates a specific slot structure in the potential SR transmission slot through the group common PDCCH, and correspondingly, if the terminal indicates that the indicated slot structure includes a UL control transmission region (capable of transmitting SR), the corresponding slot It may be determined that SR transmission is possible at.

The first SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.2. 제2 SR 전송 방법3.2. Second SR Transmission Method

The base station may set the M sequence set as one or more of the following as a transmission resource for the SR having M states to the terminal.

(1) SEQ-PUCCH (M sequences assigned)

Here, the sequences constituting the SEQ-PUCCH may be distinguished from a time resource / frequency resource / CS (Cyclic Shift) resource / root index.

(2) assign M SRS (s)

Here, the SRS (s) can be distinguished in terms of time resource / frequency resource / CS resource / root index.

Correspondingly, the terminal may transmit a SR by selecting a sequence corresponding to a state that the terminal wants to request among M states for the SR.

Here, the M states may not include a negative SR (that is, a state in which the UE does not request UL scheduling). In other words, the UE may express that it does not request the UL scheduling by not transmitting the SR to the base station.

More specifically, the SR may include a state in which the UE requests UL data scheduling (hereinafter, referred to as a positive SR) and a state in which the UE does not request UL data scheduling (Negative SR). In this case, the negative SR may be represented by the terminal not transmitting any UL signal. Accordingly, the SR may have one state of positive SR from an information point of view.

In the NR system according to an embodiment of the present invention, the terminal may utilize the SEQ-PUCCH to which one sequence is allocated as a UL signal for transmitting the positive SR.

In more general description of the above features, in the NR system according to the present invention, the UE may utilize SEQ-PUCCH to which M sequences are allocated for SR transmission having M states.

On the other hand, when the terminal transmits the SR, the base station needs to perform the UL channel measurement in order to perform UL data scheduling for the terminal. As an example of the UL channel measurement, the base station may instruct the terminal to transmit a SRS (sound reference signal), which is a UL channel measurement RS.

In this case, an operation in which the UE performs the SR transmission process and the SRS transmission process in two steps may be undesirable in terms of latency. According to this aspect, the SR transmission process and the SRS transmission process of the UE may be combined into one process. That is, the terminal may utilize the SRS resource as a UL signal for transmitting the SR to the base station.

For example, when the SR has M states, the base station may allocate M SRS resources corresponding to the M states. When the terminal transmits a specific state of the SR to the base station, the terminal may transmit the SR information to the base station by transmitting the SRS resources corresponding to the specific state.

As described above, when the terminal utilizes the SRS resource as the SR transmission resource, the terminal can reduce the delay by transmitting the UL channel estimation RS simultaneously with the SR transmission.

At this time, the (frequency axis) resource amount of the SRS resource may be differentially allocated according to the state of the SR. For example, when the states of the SR information indicate the size of the UL traffic, the larger the size of the UL traffic, the SRS resource may be configured to have more resources on the frequency axis.

In addition, the terminal according to the present invention may transmit an SR (eg, Data-SR) requesting UL scheduling and an SR (eg, Beam-SR) requesting beam refinement. In this case, the Data-SR and the Beam-SR may be transmitted through SR transmission resources set independently for each, or a joint coding result of the Data-SR and the Beam-SR may be transmitted through a single SR transmission resource. have.

For example, when the Data-SR and the Beam-SR may be the Positive SR and the Negative SR, respectively, the UE may perform a SEQ-PUCCH having three states (and corresponding three sequences) with the joint coded result as shown in the following table. Can be used for transmission. However, if both Data-SR and Beam-SR are negative SRs, the terminal may not transmit any signal.

The above operation may also be applied to SRs for different services. For example, an SR for eMBB data (e.g., eMBB-SR) and an SR for URLLC data (e.g., URLLC-SR) are transmitted to SR transmission resources set independently for each, or the eMBB-SR and URLLC-SR The joint result may be sent in a single SR transmission resource. In this case, when the eMBB-SR and the URLLC-SR may be the Positive SR and the Negative SR, respectively, similarly to Table 6, the joint coded result may be transmitted in the SEQ-PUCCH having three states (and corresponding three sequences). Can be. Even in this case, when both the eMBB-SR and the URLLC-SR are negative SRs, the UE may not transmit any signal.

The second SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.3. 제3 SR 전송 방법3.3. Third SR Transmission Method

When a UE additionally intends to perform SR transmission in a slot in which PUCCH transmission is scheduled for UCI (eg, ACK / NACK and / or CSI), the UE may transmit SR and / or UCI as follows.

(1) When the SR transmission resource and the UCI transmission resource do not overlap on the time axis (for example, when time division multiplexing)

Option 1: SR and UCI are transmitted using each transmission resource (Method 1)

Option 2: SR and UCI are combined and transmitted as UCI transmission resource

However, the operation may be applied when the SR transmission resource and the UCI transmission resource are adjacent on the time axis, and the transmission power difference between the two transmission resources is greater than or equal to a predetermined size. For example, the SR transmission resource may be a sequence, and the UCI transmission resource may be applied to the FDM PUCCH transmitted by being contiguous with the SR transmission resource on a time axis.

(2) When SR transmission resource and UCI transmission resource overlap on the time axis (for example, when frequency division multiplexing (FDM) or code division multiplexing (CDM))

Option 1: SR and UCI are transmitted using each transmission resource (Method 2)

However, when both the SR transmission resource and the UCI transmission resource are sequence resources, the CS (cyclic shift) / root index applied to the SR sequence and the UCI sequence may be set differently. For example, cyclic shift (CS) / root index values applied to an SR sequence and a UCI sequence may be set to have a predetermined gap with each other.

Option 2: SR and UCI are combined and transmitted as UCI transmission resource

However, the operation may be applied when the terminal exceeds the maximum transmission power (preset) to transmit the SR and the UCI to each transmission resource.

In addition, when the UCI transmission resource is a PUCCH resource having a DM-RS, the SR information may be expressed as a sequence multiplexed with the PUCCH DM-RS and the CDM scheme.

In the above configurations, the UCI transmission resources may be set to different PUCCH transmission structures depending on whether the corresponding slot is not a (potential) SR transmission slot or the (potential) SR transmission slot. As an example, when the corresponding slot is a (potential) SR transmission slot, the UCI transmission resource may be set to FDM-PUCCH, and when the corresponding slot is not an SR transmission slot, the UCI transmission resource may be set to SEQ-PUCCH.

Method 1/2 may be applied when SRS and UCI are transmitted in the same slot (SR is replaced by SRS) or when SR and SRS are transmitted in the same slot (UCI is replaced by SRS).

More specifically, in the conventional LTE system, when SR and UCI (eg, ACK / NACK, CSI (Channel State Information)) are transmitted in the same subframe, the SR and UCI are combined and transmitted as a single PUCCH resource.

However, in the NR system to which the present invention is applicable, the SR transmission resource and the UCI transmission resource may be multiplexed and transmitted by using a TDM scheme in one slot. Accordingly, when the SR transmission resource and the UCI transmission resource do not overlap on the time axis, the SR and the UCI may be transmitted to the transmission resources allocated to the respective basic operations.

However, even though the SR transmission resource and the UCI transmission resource are not overlapped on the time axis, they are transmitted in adjacent symbols. When the transmission power difference between the two transmission resources is large, the UE combines the SR and the UCI to combine a single transmission resource (eg, short PUCCH) Can be sent to.

For example, the UE transmits an SR to the SEQ-PUCCH (satisfying the low PAPR (peak power to average power ratio) characteristic) in the first symbol for two adjacent OFDM symbols, FDM ACK / NACK in the second symbol Assume a case of transmitting on PUCCH. Compared to SEQ-PUCCH, the FDM-PUCCH will have a high PAPR and back-off on transmit power will be applied to avoid distortion due to non-linearity of the power amplifier (PA). Can be. In this case, a difference in transmission power between the SR transmission symbol and the ACK / NACK transmission symbol may occur, and signal distortion may occur due to a slowly changing power transient period instead of immediately changing the transmission power.

As a solution to the above problem, when the transmission power difference between the SR transmission resources and the UCI transmission resources transmitted adjacent to each other is a predetermined size or more, the UE may include the SR information in the UCI transmission resources (PUCCH) and transmit. . For example, in the above example, the UE may transmit information combining the SR and the ACK / NACK to the FDM-PUCCH allocated for the purpose of transmitting the ACK / NACK in the second symbol.

Even if the SR transmission resource and the UCI (eg ACK / NACK, CSI) transmission resources overlap on the time axis, the sum of the transmission powers allocated to each transmission resource exceeds the maximum transmission power of the terminal (hereinafter, referred to as a power limited case). If not, the terminal may transmit the SR and the UCI to each transmission resource.

If the SR transmission resource and the UCI (eg, ACK / NACK, CSI) transmission resources overlap on the time axis and are a power limited case, the UE may combine the SR and the UCI to transmit the UCI transmission resources. In this case, if the UCI transmission resource is a PUCCH structure having a DM-RS, SR information may be represented by a specific sequence supported by the DM-RS and the CDM in the PUCCH. In this case, the UE may transmit SR information having M states by selecting one of the M sequences supported by the PUCCH DM-RS and the CDM and transmitting the same through time / frequency resources.

When the third SR transmission method described above is more generally extended, the UE divides the UCI (eg, SR, CSI, ACK / NACK) into a plurality of subsets and divides the plurality of subset (s) into the same slot. M) can be transmitted on multiple PUCCHs on different / same symbols.

In addition, the UE may apply one of the following methods in a slot in which SR and UCI are simultaneously scheduled.

Method 1: (for UCI transmission) configure a plurality of PUCCH resources (corresponding to SR state), and transmit UCI to specific PUCCH resources according to SR state

Method 2: transmit SR and UCI to different PUCCH resources (divided by TDM / FDM / CDM)

Method 3: Combine SR and UCI and transmit as a single PUCCH resource (However, the PUCCH format may be different from SR only or UCI only)

In addition, when the UCI transmission PUCCH resource is indicated through the DCI (My ACK / NACK resource indicator), the PUCCH resource indicated by the DCI (My ACK / NACK resource indicator) is allocated for the purpose of SR transmission. If the symbol is different from the resource, the terminal may perform the aforementioned method 2 and if the symbols are the same, the terminal may perform the aforementioned method 1.

The third SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.4. 제4 SR 전송 방법3.4. Fourth SR Transmission Method

When SR and UCI are transmitted as one PUCCH resource and the PUCCH resource includes a DM-RS, N candidates (or DM-RS resources) for the PUCCH DM-RS may be configured. In this case, the UE may express the SR information or the Negative SR having the (N-1) states by using a method of selecting and transmitting one of the N RS candidates (or DM-RS resources).

Here, the negative SR means a state in which the UE does not request UL data scheduling.

In addition, candidates (or DM-RS resources) for the plurality of DM-RSs may be distinguished in terms of cyclic shift (CS) / orthogonal cover code (OCC).

More specifically, when SR and UCI are transmitted through a single FDM-PUCCH in which DM-RS is designed as a Constant Amplitude Zero Autocorrelation (CAZAC) sequence, the coded bits for the UCI are UCI transmissions of the FDM-PUCCH. May be sent to REs for. In this case, the SR information or the Negative SR having (N-1) states may be transmitted by selecting one of N CS (cyclic shift) resources (or OCC resources) supported by the PUCCH DM-RS.

More generally, when RS candidates for DM-RS in the FDM-PUCCH are configured, the UE may express SR information through RS selection for the RS candidates.

The fourth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.5. 제5 SR 전송 방법3.5. Fifth SR Transmission Method

When the terminal transmits a plurality of PUCCHs having different transmit powers adjacent to each other on the time axis, the terminal may transmit the plurality of PUCCHs as follows.

(1) transmit with (single) transmit power for multiple PUCCHs

The (single) transmit power may be a maximum (or minimum) value of transmit power of a PUCCH having a higher priority or transmit powers of a plurality of PUCCHs.

(2) Transmit a plurality of PUCCHs with respective transmit powers, but differentially set a power transient section for each PUCCH

-The lower the priority for UCI or the smaller UCI payload size, the larger the power transition interval can be set.

More specifically, when the UE transmits a plurality of PUCCHs having greatly different transmit powers (in the same slot) adjacently on the time axis, a signal may be distorted due to a power transient period. The same transmission power may be applied to a plurality of PUCCHs transmitted adjacent to each other on the time axis (in the same slot) to mitigate signal distortion according to the power transition period.

In this case, the transmission power to be applied equally to the plurality of PUCCHs is the transmission power allocated to the PUCCH having the highest priority for UCI among the plurality of PUCCHs or the maximum value of the transmission powers allocated to the plurality of PUCCHs ( Or minimum value). Alternatively, the terminal may transmit the plurality of PUCCHs at the allocated transmission power, respectively, and may apply a power transition interval generated due to a difference in transmission power for each PUCCH. For example, the PUCCH having a lower priority for UCI may be set to have a longer power transition period.

The fifth SR transmission method includes not only a case where Short PUCCH and Short PUCCH are TDM (adjacent in the time axis) but also when Long PUCCH and Short PUCCH are TDM (adjacent in the time axis) and Long PUCCH and Long PUCCH (time). This may also apply to the case of TDM) (adjacent to the axis). Additionally, when the Short PUCCH and the Short PUCCH are TDM (adjacent in the time axis), if the transmission power difference between the two channels is greater than or equal to a certain level, the UE gives up (Drop) the Short PUCCH having a low UCI priority among the two PUCCHs or each Short PUCCH. The combined UCI may be transmitted to one Short PUCCH (or a third PUCCH) of the two Short PUCCHs by combining the UCI to be transmitted. In particular, when the Long PUCCH and the Short PUCCH are TDM (adjacent in the time axis), the UE may adjust the transmit power of the Short PUCCH to be equal to the transmit power of the Long PUCCH. Or, in this case, if the priority of the Short PUCCH is high, the UE may match the transmission power of the Long PUCCH with the transmission power of the Short PUCCH.

If the above-mentioned fifth SR transmission method is more generalized, the UE may perform one of the following operations in a situation where the PUSCH / PUCCH or the PUCCH / PUCCH are TDM (adjacent in the time axis) to each other.

1) Opt 1: The power of the channel set to the small power is adjusted to the power of the channel with the large power

2) Opt 2: Set the power of short channel to the power of long channel, or configure power transient period on the long channel side. Channels that do not form a power transient period, the power in the symbol remains constant.)

3) Opt 3: Set the power of the channel with the lower priority to the power of the channel with the higher priority, or configure the power transition section on the channel with the lower priority.

In addition, when the UE transmits a 2-symbol PUCCH, frequency hopping between two symbols may be applied or a power difference between the two symbols may be large. In this case, the UE may perform the following operation in order to avoid performance degradation due to the power transition period.

-Set time gap between two 1-symbol PUCCH constituting 2-symbol PUCCH

Here, the time gap may be set in symbol units. For example, the time gap may be set to one symbol.

In addition, the operation of setting the time gap may be selectively applied according to a frequency band in which 2-symbol PUCCH is transmitted or a subcarrier spacing (SCS) applied to 2-symbol PUCCH.

In addition, when two 1-symbol PUCCHs (or SRSs) are transmitted by TDM, the UE performs the following operations to avoid performance degradation due to a power transition period that occurs with 1-symbol PUCCH (or SRS) on / off. can do.

Set time gap between two 1-symbol PUCCHs (or SRSs)

In addition, the operation of setting the time gap may be selectively applied according to a frequency band in which 1-symbol PUCCH is transmitted or a subcarrier spacing (SCS) applied to 1-symbol PUCCH.

In addition, in a situation where two (short) PUCCHs are TDM (adjacent in the time axis), the UE may apply one of the following options.

In this case, when the terminal performs the first option, if the coding rate after the joint coding is a predetermined level or more, the terminal may apply one of the second to fourth options.

Second option: set power transient period for both (short) PUCCHs

-Third option: set a power transient period for a short PUCCH

4th option: same power setting between two (short) PUCCHs (no power transient period)

Fifth option: omit one or more short PUCCH transmissions of two short PUCCHs (ie, short PUCCH drop)

The fifth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.6. 제6 SR 전송 방법3.6. Sixth SR Transmission Method

The M sequences included in any sequence set S _B divided into CS resources (with the same time resource and frequency resource) in the sequence set S _A assigned to SEQ-PUCCH are (continuous) in ascending (or descending) order of the CS index. M gray codes can correspond to each other.

Here, the sequences in the sequence set for the SEQ-PUCCH may have one of different time resources, frequency resources, lengths, CS resources, and root indices.

More specifically, supported SEQ1, SEQ2, SEQ3 having time resource T1 and frequency resource F1 and separated by

CS index

0, 3, 6, respectively, and time resource T2 and frequency (different from time resource T1 and frequency resource F1) SEQ4 with resource F2 may be allocated to SEQ-PUCCH. In this case, a Hamming distance between UCI bits represented by each sequence may be set between sequences divided by CS resources in the same time and frequency resources. The gray code for 2 bits is given by 00, 01, 11, and 10. The gray code may correspond to each sequence in SEQ-PUCCH as follows.

More specifically, when plural sequences are allocated for SEQ-PUCCH, the sequential order is ascending (or descending) of the CS index for sequences (where CS resources are separated) on the same time and frequency resource for the plural sequences. The index can be applied under the condition that the index is allocated. Thereafter, the kth gray code for the N bit UCI may be transmitted in a sequence having the kth index in the SEQ-PUCCH.

In particular, when the SEQ-PUCCH is transmitted as a multi-time resource, if the CS resource of the sequence set used for each time resource is different (e.g., CS hopping), (contiguous) Gray code is corresponded between adjacent sequences on the CS resource by time resource. The mapping between gray code and sequence can be set differently.

The above-described sixth SR transmission method may be applied to the mapping principle between the gray code and the sequence for each time resource.

The sixth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.7. 제7 SR 전송 방법3.7. Seventh SR Transmission Method

The UE may transmit the information in which the SR and the ACK / NACK are combined through (single) SEQ-PUCCH in one of the following ways.

After bundling is applied to ACK / NACK, information on SR and Bundled ACK / NACK is transmitted in (single) SEQ-PUCCH.

-Allocate so that the distance between sequence resources is the largest between negative / positive SRs (e.g., sequences on different symbols), and ACK / NACK is allocated by considering gray coding (e.g. according to CS intervals).

More specifically, when an SR is divided into a positive SR (a state requesting UL scheduling) and a negative SR (a state not requesting UL scheduling), and the payload size of the ACK / NACK is 2 bits, the SR and the ACK / NACK The combined information can be expressed in eight states. That is, {Positive SR, 00}, {Positive SR, 01}, {Positive SR, 10}, {Positive SR, 11}, {Negative SR, 00}, {Negative SR, 01}, {Negative SR, 10} , {Negative SR, 11}.

However, since the SEQ-PUCCH mainly targets 1 bit or 2 bits, in order to allocate 8 sequences, it may be difficult to maintain a structure consistent with the structure of the SEQ-PUCCH for 1 bit or 2 bits. In this case, by applying bundling for ACK / NACK, it is possible to reduce the total number of states to be transmitted in the SEQ-PUCCH.

For example, the above-described eight states may be {Positive SR, 0 (bundled ACK / NACK of 00 or 01 or 10)}, {Positive SR, 1 (bundled ACK / NACK of 11)}, {Negative SR, 00} , {Negative SR, 01}, {Negative SR, 10}, {Negative SR, 11}, reduced to six states, or {Positive SR, 0 (bundled ACK / NACK of 00 or 01 or 10)}, { Positive SR, 1 (bundled ACK / NACK of 11)}, {Negative SR, 0 (bundled ACK / NACK of 00 or 01 or 10)}, {Negative SR, 1 (bundled ACK / NACK of 11)} Can be reduced to the dog state.

Alternatively, when 8 sequences are used, sequence resources may be allocated to ensure orthogonality best between sequence resources meaning positive SRs and sequence resources meaning negative SRs. For example, it is assumed that there are eight sequences in SEQ-PUCCH, and the eight sequences are composed of four sequences divided into CS resources for each symbol for two symbols. In this case, a sequence may be allocated such that only positive SR + ACK / NACK information is represented in the first symbol of the two symbols and only Negative SR + ACK / NACK information is represented in the second symbol.

In addition, by using M sequence resources (divided in the frequency domain and the code domain), the UE may determine the total (for all N) for the SR state (eg N ₁ ) and the HARQ-ACK state (eg N ₂ ). Or some) combinations (eg, N ₁ * N ₂ ) may transmit a particular single combination in one of the following ways.

(1) Method # 1: send a specific single sequence

-Up to ₁ _M C combination can be represented for SR state and HARQ-ACK state.

(2) Method # 2: transmission of specific L sequences (of M sequences)

For a given L value, maximum _M C _L combinations for SR state and HARQ-ACK state can be represented

In this case, the fact that the sequence is divided in the frequency domain and the code domain means that frequency axis resources allocated between the sequences and / or CS (cyclic shift) or OCC (orthogonal cover code) are distinguished.

In addition, the UE may not transmit any sequence for a specific SR and HARQ-ACK combination. (Ie expressed in DTX)

In addition, the terminal utilizes four sequences (eg, Seq. 1, Seq. 2, Seq. 3, Seq. 4) to the SR state (eg Positive SR or Negative SR) and the 2-bit HARQ-ACK state (eg {ACK, ACK}, {ACK, NACK}, {NACK, ACK}, {NACK, NACK}). A specific combination of the eight combinations of one or more sequences (of all four sequence resources) Can be transmitted and expressed. (Ie M = 4)

1) Positive SR + {ACK, ACK}

-Seq. 1 transfer

2) Positive SR + {NACK, NACK} (or Positive SR only)

-Seq. 2 transmission

3) Negative SR + {ACK, ACK}

-Seq. 3 transmission

4) Negative SR + {NACK, NACK}

-Seq. 4 transmissions (no signal if negative SR only)

5) Positive SR + {ACK, NACK} or Positive SR + {NACK, ACK} or Negative SR + {ACK, NACK} or Negative SR + {NACK, ACK}

5-1) Simultaneous Transmission for Multiple Sequences

The number of cases in which a sequence pair (= 2 sequences) of 4 sequences is drawn for each (SR and HARQ-ACK) combination (e.g. Seq. 1 + Seq. 2 or Seq. 1 + Seq. 3 or Seq. 1 + Seq. 4 or Seq. 2+ Seq. 3 or Seq. 2+ Seq. 4 or Seq. 3 + Seq. 4) Assign and transmit a specific (single) sequence pair

Here, the UE allocates and transmits different sequence pairs for different SR and HARQ-ACK combinations.

5-2) Only transmission for a single sequence is possible (eg power limited case)

If it is a positive SR and {ACK, NACK} (or {NACK, ACK}), Seq. 2 transmission

If the Negative SR and {ACK, NACK} (or {NACK, ACK}). 4 transmission

When only M = 4 sequences (Seq. 1, Seq. 2, Seq. 3, Seq. 4) are used to express a positive or negative SR + 2 bit HARQ-ACK, the terminal may transmit the sequence as follows. have. In this case, in the following table, 'O' means transmission of the sequence.

[1] Case 1: Simultaneous Transmission for Multiple Sequences

[2] Case 2: Only transmission for a single sequence is possible (eg power limited case)

Or, the base station may be set to transmit the sequence (s) according to Case 1 or Case 2 to the terminal.

In the example, in case of Negative SR and DTX, the UE may not transmit any signal.

However, in the above example, in case of Positive SR (only), the UE may transmit the same sequence (eg Seq. 2) as Positive SR + {NACK, NACK}.

In addition, in the above example, the base station may determine a combination of the SR and the HARQ-ACK based on the detected sequence (s) as follows.

1] Seq. When only 1 is detected: judged as Positive SR + {ACK, ACK}

2] Seq. 2 only detection: Positive SR + {NACK, NACK}

3] Seq. 3 only: Negative SR + {ACK, ACK}

4] Seq. 4 only: Negative SR + {NACK, NACK}

5] Seq. 1 + Seq. 2 detection: Positive SR + {ACK, NACK}

6] Seq. 2 + Seq. 3 On detection: Positive SR + judged as {NACK, ACK}

7] Seq. 1 + Seq. 4 Detection: Negative SR + judged as {ACK, NACK}

8] Seq. 3 + Seq. 4 On detection: determined as negative SR + {NACK, ACK}

In the foregoing example, Seq. 1 and Seq. 3 is transmitted in symbol A, and Seq. 2 and Seq. When 4 is transmitted by TDM in symbol B (≠ symbol A), the UE can always operate in Case 1. That is, when simultaneous transmission sequences are TDM, since the case of power limited does not occur, the terminal may always perform simultaneous transmission.

More generalizing the above configuration, Seq. 1 and Seq. 3 is transmitted in symbol A and Seq. 2, Seq. When 4 is transmitted by TDM in symbol B (≠ symbol A), the UE may express a specific combination of SR and HARQ-ACK using one of the following eight cases of transmitting a sequence.

<1> Seq. One

<2> Seq. 2

<3> Seq. 3

<4> Seq. 4

<5> Seq. 1 + Seq. 2

<6> Seq. 1 + Seq. 4

<7> Seq. 3 + Seq. 2

<8> Seq. 3 + Seq. 4

In this case, the eight sequence transmission combinations include a total of eight combinations of SR and 2 bits HARQ-ACK, that is, Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, and Negative SR + {NACK, ACK}. , Negative SR + {NACK, NACK}, Positive SR + {ACK, ACK}, Positive SR + {ACK, NACK}, Positive SR + {NACK, ACK}, Positive SR + {NACK, NACK}) Can be.

As a specific example, the eight sequence transmission combinations may correspond one-to-one as shown in the table corresponding to Case 1 described above.

Or Seq. 1 is transmitted in symbol A and Seq. 2, Seq. 3, Seq. When 4 is transmitted by TDM in symbol B (≠ symbol A), the UE may express a specific combination of SR and HARQ-ACK using one of the following seven cases of transmitting a sequence.

1> Seq. One

2> Seq. 2

3> Seq. 3

4> Seq. 4

5> Seq. 1 + Seq. 2

6> Seq. 1 + Seq. 3

7> Seq. 1 + Seq. 4

In this case, the seven sequence transmission combinations are seven combinations except Negative SR + {NACK, NACK} among all combinations of SR and 2 bits HARQ-ACK, that is, Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, Negative SR + {NACK, ACK}, Positive SR + {ACK, ACK}, Positive SR + {ACK, NACK}, Positive SR + {NACK, ACK}, Positive SR + {NACK, NACK} Can correspond one to one.

Alternatively, the six sequence transmission combinations of the seven sequence transmission combinations may include the following six combinations of 2 bits HARQ-ACK, that is, Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, and Negative SR + { NACK, ACK}, Negative SR + {NACK, NACK}, Positive SR + All ACK (ie, {ACK, ACK})}, Positive SR + Bundled NACK (ie, {NACK, ACK}, {ACK, NACK}) Can correspond one to one. In this case, one of the seven sequence transmission combinations is a transmission combination that transmits a plurality of sequences (for example, Seq. 1 + Seq. 2, Seq. 1 + Seq. 3, Seq. 1 + Seq. 4). It can correspond to either.

As an example, the terminal may perform sequence transmission for each SR and 2 bits HARQ-ACK combination as shown in the following table.

As another example, the UE may use six sequences (eg, Seq. 1, Seq. 2, Seq. 3, Seq. 4, Seq. 5, Seq. 6) to perform an SR state (eg, Positive SR or Negative SR). ) And 8 bits for 2 bits HARQ-ACK status (e.g. {ACK, ACK}, {ACK, NACK}, {NACK, ACK}, {NACK, NACK}). Single or multiple sequences of six sequence resources may be transmitted and expressed. (Ie M = 6)

(A) Negative SR + {ACK, ACK}

-Seq. 1 transfer

(B) Negative SR + {ACK, NACK}

-Seq. 2 transmission

(C) Negative SR + {NACK, ACK}

-Seq. 3 transmission

(D) Negative SR + {NACK, NACK}

-Seq. 4 transmissions (no signal if negative SR only)

(E) Positive SR only

-Seq. 5 transmission

(F) Positive SR + {ACK, ACK}

-Seq. 6 transmission

(G) Positive SR + {ACK, NACK} or Positive SR + {NACK, ACK} or Positive SR + {NACK, NACK}

(G-1) When simultaneous transmission for multiple sequences is possible

The number of cases in which a sequence pair (= 2 sequences) of 6 sequences is drawn for each (SR and HARQ-ACK) combination (eg Seq. 1 + Seq. 2 or Seq. 1 + Seq. 3 or Seq. 1 + Seq. 4 or Seq. 1 + Seq. 5 or Seq. 1 + Seq. 6 or Seq. 2+ Seq. 3 or Seq. 2+ Seq. 4 or Seq. 2+ Seq. 5 or Seq. 2+ Assign and transmit a specific (single) sequence pair, either Seq. 6 or Seq. 3 + Seq. 4 or Seq. 3 + Seq. 5 or Seq. 3 + Seq.

(G-2) Only transmission for a single sequence is possible (e.g. power limited case)

Seq if it is a positive SR and {ACK, NACK} (or {NACK, ACK} or {NACK, NACK}). 5 transmission

In case of using only M = 6 sequences (Seq. 1, Seq. 2, Seq. 3, Seq. 4, Seq. 5, Seq. 6) to express positive or negative SR + 2 bit HARQ-ACK, Can transmit the sequence as follows. In this case, in the following table, 'O' means transmission of the sequence.

A) Case 3: When simultaneous transmission for multiple sequences is possible

B) Case 4: Only transmission for a single sequence (eg power limited case)

Alternatively, the base station may set to transmit the sequence (s) according to Case 3 or Case 4 to the terminal.

In the above example, in case of Negative SR and DTX, the terminal may not transmit any signal.

[A] Seq. When only 1 is detected: determined as negative SR + {ACK, ACK}

[B] Seq. 20,000 detection: determined as negative SR + {ACK, NACK}

[C] Seq. 3 only: Negative SR + {NACK, ACK}

[D] Seq. 4 only: Negative SR + {NACK, NACK}

[E] Seq. 50,000 detection: judged as Positive SR + bundled NACK (or DTX)

[F] Seq. 6 only detection: Positive SR + {ACK, ACK}

[G] Seq. 5 + Seq. 2 detection: Positive SR + {ACK, NACK}

[H] Seq. 5 + Seq. 3 On detection: Positive SR + judged as {NACK, ACK}

[I] Seq. 5 + Seq. 4 On detection: Positive SR + {NACK, NACK}

In addition, the terminal may modify the sequence transmission for Positive SR + {NACK, NACK} and Positive SR + DTX (ie, Positive SR only) as shown in Table 13 or Table 14 below.

According to Table 13, the base station may determine the combination of the SR and the HARQ-ACK as follows based on the detected sequence (s).

A] Seq. When only 1 is detected: determined as negative SR + {ACK, ACK}

B] Seq. 20,000 detection: determined as negative SR + {ACK, NACK}

C] Seq. 3 only: Negative SR + {NACK, ACK}

D] Seq. 4 only: Negative SR + {NACK, NACK}

E] Seq. 50,000 detection: positive SR + {NACK, NACK} (or DTX)

F] Seq. 6 only detection: Positive SR + {ACK, ACK}

G] Seq. 5 + Seq. 2 detection: Positive SR + {ACK, NACK}

H] Seq. 5 + Seq. 3 On detection: Positive SR + judged as {NACK, ACK}

Or, according to Table 14, the base station can determine the combination of the SR and the HARQ-ACK as follows based on the detected sequence (s).

<A> Seq. When only 1 is detected: determined as negative SR + {ACK, ACK}

<B> Seq. 20,000 detection: determined as negative SR + {ACK, NACK}

<C> Seq. 3 only: Negative SR + {NACK, ACK}

<D> Seq. 4 only: Negative SR + {NACK, NACK}

<E> Seq. 50,000 detection: judged as Positive SR + bundled NACK (or DTX)

<F> Seq. 6 only detection: Positive SR + {ACK, ACK}

<G> Seq. 5 + Seq. 2 detection: Positive SR + {ACK, NACK}

<H> Seq. 5 + Seq. 3 On detection: Positive SR + judged as {NACK, ACK}

<I> Seq. 5 + Seq. 4 On detection: determined as Positive SR + {NACK, NACK} (or DTX)

In addition, when the terminal transmits 1 bit HARQ-ACK and SR, the following sequence allocation may be considered.

Specifically, when the terminal utilizes only M = 2 sequences (for example, Seq. 1 and Seq. 2) for (Positive or Negative) SR + 2 bit HARQ-ACK, the terminal may operate as follows. .

A> Case 1: When simultaneous transmission for multiple sequences is possible

In this case, the terminal may operate as one of the following tables.

In the above example, it is assumed that the UE can always transmit a plurality of sequences, and in case of Positive SR (only), the UE transmits the same sequence as that of Positive SR + NACK (ie, Seq. 2), and Negative SR + NACK. When the terminal may not transmit any signal.

In addition, the terminal (SR) (for example, positive SR, negative SR) and 2 bits HARQ-ACK in the (2-symbol) SEQ-PUCCH transmission structure for each symbol (selecting and transmitting one of N sequences) per symbol for two symbols When the combined information is transmitted, the UE can express 8 combinations of SR and 2 bits HARQ-ACK by using 8 pairs of the total N * N sequence pairs transmitted for 2 symbols.

In addition, the UE may utilize a PUCCH (hereinafter SEQ-PUCCH) structure representing a specific state of the M-bits UCI by selecting and transmitting one of 2 ^M sequences for M-bits UCI (eg, HARQ-ACK). have. In this case, the M-bits UCI 2 that may be used for transmitting ^{the M} sequence has the same frequency resource: 2 with (e.g., PRBs) cross each other (CS (from the cyclic shift) domain) having the same interval ^{the M} CS (cyclic shift ), PUCCH resources may be represented by a frequency resource index (for example, a PRB index) and a CS start value in the corresponding frequency resource. In this case, the terminal may infer the interval between the CS start value and the CS based on the remaining 2 ^M -1 CS values. The interval between CSs may be determined according to the UCI payload size or based on a value set by the base station through a higher layer signal.

In addition, the base station may set a plurality of PUCCH resources to the terminal, and then select and indicate a specific PUCCH resource to be used for UCI transmission among the plurality of PUCCH resources by DCI.

Additionally, in case of SR only transmission, the UE may operate as follows according to whether it is a positive SR or a negative SR. Specifically, the UE may transmit a specific single sequence if Positive SR only, and may not transmit the corresponding sequence if Negative SR only (that is, specific sequence based on / off keying). In addition, in case of N bits HARQ-ACK only transmission, the UE may select and transmit a specific sequence (corresponding to HARQ-ACK state) among 2 ^N sequences (ie, sequence selection based PUCCH). In this case, when the transmission for the SR and the transmission for the HARQ-ACK occurs in the same time resource, the terminal may operate as follows.

A. In case of Positive SR, perform action corresponding to SR only transmission

That is, only a specific single sequence allocated for the purpose of SR transmission is transmitted.

In this case, however, the base station may regard the HARQ-ACK as DTX or All NACK.

B. In case of Negative SR, perform operation corresponding to transmission of HARQ-ACK only

That is, a specific sequence (corresponding to HARQ-ACK state) is transmitted among 2 ^N sequences allocated for HARQ-ACK transmission purposes.

However, if the transmission for the SR and the transmission for the HARQ-ACK occurs in the same time resource, and the terminal is not a power limited case can transmit two sequences at the same time, the terminal may operate as follows. .

C. In case of Positive SR, perform operation corresponding to SR only transmission

-Transmission of a specific single sequence allocated for the purpose of SR transmission

In addition, transmit a specific sequence (corresponding to the HARQ-ACK state) of 2 ^N sequences allocated for HARQ-ACK transmission purposes.

D. In case of negative SR, perform operation corresponding to transmission of HARQ-ACK only

The seventh SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.8. 제8 SR 전송 방법3.8. Eighth SR Transmission Method

In the following description, a scheduling request (SR) refers to a physical layer signal through which a UE transmits a presence or absence of a UL transmission resource request (or UL transmission data) to a base station, and a positive SR refers to a UL transmission resource request (or UL transmission data). Negative SR is assumed to mean that there is no UL transmission resource request (or UL transmission data).

In this case, when a (short) PUCCH resource for transmitting an SR for a service type A and a PUSCH resource for transmitting data for a service type B (≠ service type A) overlap each other on a time axis, the terminal may perform one or more of the following schemes. Applicable

(1) Sends SR information (eg, positive SR or negative SR) in resources (time and frequency) allocated by PUSCH in the form of UCI piggyback

In this case, when performing UCI piggyback on the SR, the UE applies puncturing (or rate-matching) on some UL data in the PUSCH, and then (1 bit) transmits (encoded) UCI bits for the SR (between the base station and the UE). In accordance with the promised RE mapping pattern), it may transmit to specific REs in the PUSCH.

(2) Puncturing the symbols in the PUSCH to the PUCCH resource and transmitting SR information (eg, Positive SR or Negative SR) to the PUCCH on the symbols

Here, the PUCCH resource for transmitting the SR information may be in the form of on / off keying for a specific sequence.

(3) Method of Transmitting SR Information (eg, Positive SR or Negative SR) by Switching PUSCH DM-RS Sequence

Here, the PUSCH DM-RS whose sequence is switched according to the SR information is the PUSCH DM-RS nearest to the PUCCH resource allocated for the SR transmission purpose (or the fastest PUSCH DM-RS after the PUCCH resource allocated for the SR transmission purpose). Can be.

In addition, switching the PUSCH DM-RS sequence may mean switching a scrambling or cyclic shift value for the DM-RS.

(4) Omit PUSCH transmission (ie, PUSCH drop) and transmit only (short) PUCCH resources for SR transmission

In the above configuration, the (short) PUCCH resource may have a transmission interval corresponding to one or two OFDM symbols.

In addition, the configuration may be equally applied between a (short) PUCCH resource for transmitting an SR and a DM-RS based (long) PUCCH resource for transmitting a UCI (eg, HARQ-ACK or CSI). In other words, in the above configuration, 'PUSCH' may be replaced with 'DM-RS based (long) PUCCH' and 'PUSCH DM-RS' may be replaced with 'PUCCH DM-RS'.

In addition, when the frequency resource between the (short) PUCCH for transmitting the SR and the (long) PUSCH for transmitting UL data is different, and the UE can transmit the FDM PUCCH and the PUSCH simultaneously, the UE may be connected to the (short) PUCCH and ( long) PUSCH can be transmitted simultaneously.

More specifically, the SR is transmitted as a PUCCH resource based on a sequence selection in one symbol (eg, SEQ-PUCCH, a PUCCH resource representing UCI by selecting and transmitting one of a plurality of sequences) and transmitting to the SR. When the transmission period is set to one OFDM symbol, a case may occur in which a SR transmission collides with another PUSCH transmission in a slot. In this case, if the SR and the PUSCH are transmissions for the same service type, the UE is already transmitting the PUSCH, and thus the MAC layer (or MAC layer) or higher layer is transmitted through the PUSCH without transmitting the SR separately in the physical layer (or PHY layer). A buffer state report (BSR) or UL scheduling request may be transmitted as layer information.

On the other hand, when the SR and the PUSCH are different service types, a requirement for transmission reliability required for each service type may be different. Accordingly, it may be preferable that the SR and the PUSCH are transmitted as physical layer signals, respectively.

Therefore, in the present invention, when the SR and the PUSCH having different service types are transmitted, after performing puncturing (or rate-matching) on some REs or some symbols in the PUSCH, UCI REs containing SR information as corresponding resources or A method of transmitting a PUCCH resource or a method of transmitting SR information to a PUSCH DM-RS by changing a sequence of a PUSCH DM-RS according to SR information is proposed.

The eighth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.9. 제9 SR 전송 방법3.9. 9th SR Transmission Method

When (short) PUCCH resources for SR transmission and (long) PUCCH resources (based on Sequence Modulation) for transmission of a specific UCI (eg, HARQ-ACK or CSI) overlap in the time axis, the UE may perform one or more of the following schemes. Can be applied.

(1) (sequence modulation based) (long) Transmit SR information (either; Positive SR or Negative SR) by switching sequence (s) transmitted in specific symbol (s) in PUCCH resource

Here, specific symbol (s) in the (long) PUCCH resource may be symbols corresponding to (time axis) transmission resource of (shot) PUCCH resource for SR transmission.

In addition, when switching the sequence (s) in a specific symbol (s) in the (long) PUCCH resource, it may be to switch the scrambling or cyclic shift (Cyclic shift) value for the sequence.

(2) (Sequence modulation based) (long) PUCCH transmission is omitted (i.e. PUCCH drop), only (short) PUCCH resources for SR transmission

Here, the (short) PUCCH resource may have a transmission period corresponding to one or two OFDM symbols.

In addition, the sequence modulation-based (long) PUCCH resource means a PUCCH resource transmitted in a form in which a modulated symbol for a UCI and a sequence are multiplied for each symbol in a plurality of symbols (for example, four or more). do.

In addition, if the frequency resource between the (short) PUCCH for transmitting the SR and the (long) PUCCH for transmitting a specific UCI is different, and the UE can transmit the FDM (short) PUCCH and (long) PUCCH at the same time, the UE May simultaneously transmit the (short) PUCCH and the (long) PUCCH.

More specifically, the UE multiplies a predetermined sequence and a modulated symbol for a UCI (eg, a modulation symbol for a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK)) for each symbol for a plurality of symbols or more. It is possible to support a sequence modulation (long) PUCCH for transmitting the softened signal.

Meanwhile, the SR is transmitted as a PUCCH resource based on a sequence selection in one symbol (for example, SEQ-PUCCH, a PUCCH resource representing UCI by selecting and transmitting one of a plurality of sequences) and transmitting a single transmission period for the SR. When configured as an OFDM symbol, the PUCCH resources for transmitting the SR may overlap in specific transmission symbol (s) in a sequence modulation based (long) PUCCH for transmitting the UCI (other than SR). In this case, the UE may express that SR information is transmitted in the symbol (s) by switching the sequence (s) of the sequence modulation based (long) PUCCH corresponding to the specific transmission symbol (s).

In particular, if the sequence satisfies Low PAPR, the UE does not transmit SR and (long) PUCCH at the same time so that the SR information is allocated within a frequency resource that is already allocated as a sequence modulation based (long) PUCCH resource while maintaining the Low PAPR characteristic. There is an advantage to send more.

More specifically, the base station sets two or more cyclic shift offset values (eg, CS offset 0, CS offset 1) for the sequence modulation based (long) PUCCH for the operation, and the specific symbols in the sequence modulation based (long) PUCCH By indicating whether to transmit the SR in the UE can be applied to different CS offset. For example, when the base station instructs SR transmission in a specific symbol in the sequence modulation based (long) PUCCH, the terminal applies CS offset 1 to the sequence in the symbol, the base station is specified in the sequence modulation based (long) PUCCH If the symbol does not indicate SR transmission, the terminal may apply CS offset 0 to the sequence in the symbol.

The ninth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.10. 제10 SR 전송 방법3.10. Tenth SR Transmission Method

It is assumed that N HARQ-ACK states correspond to N sequences one to one for each symbol for two (OFDM) symbols, and the UE selects and transmits a sequence corresponding to the HARQ-ACK state. In this case, SR information may be expressed as follows by changing a one-to-one correspondence between N HARQ-ACK states and a sequence in the first symbol and / or the second symbol.

For example, when a 1 bit HARQ-ACK is transmitted in a sequence selection scheme for two (OFDM) symbols, two sequences for two HARQ-ACK states (ACK and NACK) are one-to-one for each symbol as shown in the following table. Can correspond. At this time, Seq. 1, Seq. 2, Seq. 3. Seq. Four may be all different or some may be the same sequence.

In particular, when the UE wants to indicate SR + 1 bit HARQ-ACK information, the UE may express SR information by changing a HARQ-ACK state and a one-to-one correspondence between sequences in the first and / or second symbols. Can be. The table below shows an example for this. In this case, p-SR and n-SR mean positive SR and negative SR, respectively.

As another example, when the terminal transmits a 2-bit HARQ-ACK in a sequence selection scheme for two (OFDM) symbols according to the present invention, the terminal is four HARQ-ACK State (ACK / ACK) for each symbol as shown in the following table , 4 sequences for ACK / NACK, NACK / ACK, and NACK / NACK can be corresponded one-to-one. At this time, Seq. 1, Seq. 2, … . Seq. 8 may be all different or some may be the same sequence.

In addition, according to the present invention, if the UE wants to indicate SR + 2 bit HARQ-ACK information, the UE changes SR information by changing a HARQ-ACK state and a one-to-one correspondence between sequences in the first and / or second symbols. I can express it. The table below shows an example for this. In this case, p-SR and n-SR mean positive SR and negative SR, respectively.

In more general description of the above configurations, N sequence pairs transmitted in the first symbol and the second symbol are represented by (Seq. X ₁ , Seq. Y ₁ ), (Seq. X ₂ ) to represent N HARQ-ACK states. , Seq. Y ₂ ),. , (Seq. X _N , Seq. Y _N ), the terminal is a sequence set {Seq. X ₁ , Seq. X ₂ ,.. , Seq. X _N } and the sequence set {Seq. Y ₁ , Seq. Y ₂ ,.. , Seq. Y _N } HARN-ACK + positive SR may be expressed using N sequence pairs among N ² sequence pairs possible, and HARQ-ACK + negative SR may be expressed using other N sequence pairs.

The tenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.11 제11 SR 전송 방법3.11 Eleventh SR Transmission Method

When the UE expresses the UCI state for the SR and the 2 bits HARQ-ACK in a manner of selecting and transmitting one of a plurality of sequences, the base station expresses some of the UCI states for the SR and the 2 bits HARQ-ACK as one state. Whether or not to bundle may be set to the terminal.

Here, the base station may set whether to bundle the same through higher layer signals (such as RRC signaling) and / or downlink control information (DCI).

In addition, the number of sequences assumed by the UE to express the SR and the 2 bits HARQ-ACK may vary according to the bundling instruction.

More specifically, when the terminal expresses the UCI state for the SR and 2 bits HARQ-ACK in a sequence selection method without a separate bundling process, the terminal needs eight sequences according to the eight UCI states as shown in the following table You can do

However, when the terminal uses eight sequences as shown in the above table, the required sequence resources may be too large. Accordingly, a method of bundling some states and expressing them in one sequence may be considered.

For example, in view of spatial bundling for 2 bits HARQ-ACK, the UE may bundle states having the same HARQ-ACK information and express them in one sequence as shown in the following table.

In this case, if the UE always operates as shown in Table 24, resource waste may be severe, and if the UE always operates as shown in Table 25, resolution for HARQ-ACK information may be reduced. Accordingly, the base station may semi-statically or dynamically set one of the above two modes according to the PUCCH resource state.

For example, the base station may configure whether to bundle some of the UCI states for the SR and the 2-bit HARQ-ACK to one terminal through RRC signaling and / or DCI.

The eleventh SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.12. 제12 SR 전송 방법3.12. 12th SR Transmission Method

The base station may set a PUCCH resource set (for HARQ-ACK transmission) to the terminal through a higher layer signal, and indicate a PUCCH resource to be applied in the set according to DCI and / or implicit mapping scheme. In this case, the base station may set the PUCCH resource set (for HARQ-ACK transmission) independently for a (mini-) slot to which the SR is transmitted and a (mini-) slot to which the SR is not transmitted.

As a specific example, in a slot configured for transmission of an SR, since a PUCCH resource for HARQ-ACK transmission and a PUCCH resource for SR transmission coexist, the base station may be restricted in setting a PUCCH resource set for HARQ-ACK transmission. .

On the other hand, in the slot where the SR is not transmitted, there may be more candidate groups of PUCCH resources for HARQ-ACK transmission, and thus, the base station may be more free in setting up a PUCCH resource set.

For example, in the latter case, the base station may set the PUCCH resource set to be distributed in a wider band on the frequency axis so as to easily obtain frequency diversity. Therefore, preferably, the base station may independently set a PUCCH resource set for HARQ-ACK transmission for a (mini-) slot in which an SR is transmitted and a (mini-) slot in which an SR is not transmitted.

The 12th SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.13. 제13 SR 전송 방법3.13. The thirteenth SR transmission method

SR transmission from the base station (short) PUCCH resources and log ₂ (N) bit (s) (where N = 2 or 4) HARQ-ACK transmission (short) PUCCH resources (some) signal transmission to have a time axis resource overlapping (partly) In this case, the UE may select and transmit one of a plurality of sequences to express the UCI status for the SR and the HARQ-ACK. At this time, the base station may configure the SR short PUCCH and HARQ-ACK short PUCCH resources as follows.

(1) Opt. 1: Method for allocating four sequences as SR PUCCH resources and allocating N sequences as HARQ-ACK PUCCH resources

(1-1) Four sequences in SR transmission (short) PUCCH resources are each (same) Cyclic shift index view for a specific (Low PAPR / CM (Peak-to-Average Power Ratio / Cubic Metric)) sequence In this case, it may be a sequence to which one of four Cyclic shift values having equal intervals is applied.

As a specific example, when there are L Cyclic shifts in the PRB and an Initial Cyclic Shift Index allocated to SR PUCCH resources is k, Cyclic shift values corresponding to the four sequences are Cyclic shifts. In terms of index, it may be set to cyclic shift values corresponding to k, (k + L / 4) mod L, (k + 2L / 4) mod L, and (k + 3L / 4) mod L.

(1-2) SR transmission (short) One of the four sequences in the PUCCH resource may be used as a resource indicating whether the SR is in an on / off keying scheme in case of SR only transmission. In this case, the sequence resource corresponding to the SR only may be a resource reserved in an SR transmission period.

As a specific example, the sequence may correspond to an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource.

(1-3) HARQ-ACK Transmission (short) N sequences in a PUCCH resource may correspond to N HARQ-ACK states in the case of HARQ-ACK only transmission. Accordingly, the terminal may select and transmit a sequence corresponding to the HARQ-ACK state to be reported.

(1-4) When signal transmission is instructed to have a time axis resource in which SR transmission (short) PUCCH resources and HARQ-ACK transmission (short) PUCCH resources (partly) overlap from a base station, a sequence corresponding to each UCI state It can be defined as follows. In this case, the terminal may transmit a corresponding sequence to represent the corresponding UCI state.

(1-2-1) When N = 2

Two sequences in an SR transmission (short) PUCCH resource may correspond to {Positive SR, ACK} and {Positive SR, NACK}, respectively.

As a specific example, when an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource is k, the two sequences have a Cyclic shift value corresponding to k, (k + L / 2) mod L in terms of a cyclic shift index. Can be heard.

In addition, the sequence corresponding to {Positive SR, NACK} may be a sequence corresponding to SR only.

Two sequences in a HARQ-ACK transmission (short) PUCCH resource may correspond to {Negative SR, ACK} and {Negative SR, NACK}, respectively.

(1-2-2) When N = 4

Four sequences in the SR transmission (short) PUCCH resource are respectively assigned to {Positive SR, A / A}, {Positive SR, A / N}, {Positive SR, N / A}, and {Positive SR, N / N}. It can respond.

-As a specific example, the sequence corresponding to {Positive SR, N / N} may be a sequence corresponding to SR only.

4 sequences in a HARQ-ACK transmission (short) PUCCH resource are respectively {Negative SR, A / A}, {Negative SR, A / N}, {Negative SR, N / A}, {Negative SR, N / N }.

(2) Opt. 2: Method for allocating two sequences as SR PUCCH resources and allocating N sequences as HARQ-ACK PUCCH resources

(2-1) Two sequences in SR transmission (short) PUCCH resource are two Cyclic shift values with equal spacing (in terms of cyclic shift index) for a particular (Low PAPR / CM) sequence in (same) PRB It may be a sequence to which one of the applied.

As a specific example, when there are L Cyclic shifts in the PRB and the Initial Cyclic Shift Index allocated to the SR PUCCH resource is k, the Cyclic shift values corresponding to the two sequences are k, in terms of the Cyclic shift index. Cyclic shift values corresponding to (k + L / 2) mod L may be used.

(2-2) SR transmission (short) One of the two sequences in the PUCCH resource is used as a resource for indicating whether the SR in the On / Off keying method in the case of SR only transmission, the sequence resource corresponding to the SR only May be a resource reserved in an SR transmission period.

(2-3) HARQ-ACK Transmission (short) N sequences in a PUCCH resource correspond to N HARQ-ACK states when HARQ-ACK only transmission, and the UE selects a sequence corresponding to a HARQ-ACK state to be reported. Can be sent.

(2-4) When signal transmission is instructed to have a time axis resource in which SR transmission (short) PUCCH resources and HARQ-ACK transmission (short) PUCCH resources overlap (partly) from a base station, a sequence corresponding to each UCI state It can be defined as follows. In this case, the terminal may transmit a corresponding sequence to represent the corresponding UCI state.

(2-4-1) When N = 2

(2-4-2) When N = 4

Two sequences in an SR transmission (short) PUCCH resource may correspond to {Positive SR, A / A}, {Positive SR, A / N or N / A or N / N}, respectively.

As a specific example, one of the two sequences may correspond to a case in which a positive SR and an ACK / NACK bundling result (based on a logical AND operation) for 2 bits HARQ-ACK are NACK. In addition, the sequence corresponding to {Positive SR, A / N or N / A or N / N} may be a sequence corresponding to SR only.

(3) Opt. 3: A method of allocating one sequence to SR transmission (short) PUCCH resources and allocating (2N-1) sequences to HARQ-ACK transmission (short) PUCCH resources

(3-1) One sequence in an SR transmission (short) PUCCH resource may be a cyclic shift value corresponding to an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource.

(3-2) SR transmission (short) One sequence in a PUCCH resource is used as a resource for indicating whether the SR is SR by On / Off keying method in case of SR only transmission, and a sequence resource corresponding to the SR only is an SR transmission period. The resource may be reserved at.

(3-3) HARQ-ACK Transmission (short) N sequences of the (2N-1) sequences in the PUCCH resource correspond to N HARQ-ACK states when HARQ-ACK only transmission, and the UE actually reports A sequence corresponding to the HARQ-ACK state may be selected and transmitted.

(3-4) When signal transmission is instructed to have a time axis resource where (short) the SR transmission (short) PUCCH resource and the HARQ-ACK transmission (short) PUCCH resource overlap (partly) from the base station, the sequence corresponding to each UCI state It can be defined as follows. In this case, the terminal may transmit a corresponding sequence to represent the corresponding UCI state.

(3-4-1) When N = 2

One sequence in an SR transmission (short) PUCCH resource may correspond to {Positive SR, NACK}.

Three sequences in the HARQ-ACK transmission (short) PUCCH resource may correspond to {Positive SR, ACK}, {Negative SR, ACK}, and {Negative SR, NACK}, respectively.

(3-4-2) When N = 4

One sequence in the SR short PUCCH resource may correspond to {Positive SR, N / N}.

The seven sequences in the HARQ-ACK transmission (short) PUCCH resource are {Positive SR, A / A}, {Positive SR, A / N}, {Positive SR, N / A}, {Negative SR, A / A, respectively. }, {Negative SR, A / N}, {Negative SR, N / A}, and {Negative SR, N / N}.

(4) Opt. 4: Method of allocating one sequence to SR transmission (short) PUCCH resources and allocating 2N sequences to HARQ-ACK transmission (short) PUCCH resources

(4-1) One sequence in an SR transmission (short) PUCCH resource may be a cyclic shift value corresponding to an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource.

(4-2) SR transmission (short) One sequence in a PUCCH resource is used as a resource for indicating whether the SR is in an on / off keying method in case of SR only transmission, and a sequence resource corresponding to the SR only is an SR transmission period. The resource may be reserved at.

(4-3) HARQ-ACK transmission (short) N sequences of the 2N sequences in the PUCCH resource correspond to N HARQ-ACK states when HARQ-ACK only transmission, and the UE actually reports the HARQ-ACK state A sequence corresponding to may be transmitted.

(4-4) When signal transmission is instructed to have a time axis resource where (short) the SR transmission (short) PUCCH resource and the HARQ-ACK transmission (short) PUCCH resource overlap (partly) from the base station, the sequence corresponding to each UCI state It can be defined as follows. In this case, the terminal may transmit a corresponding sequence to represent the corresponding UCI state.

(4-4-1) When N = 2

Two specific sequences in the HARQ-ACK transmission (short) PUCCH resource may correspond to {Positive SR, ACK} and {Positive SR, NACK}.

The remaining two sequences except for the two sequences in the HARQ-ACK transmission (short) PUCCH resource may correspond to {Negative SR, ACK} and {Negative SR, NACK}, respectively. In this case, the two sequences may be two sequences for HARQ-ACK only.

(4-4-2) When N = 4

4 specific sequences in the HARQ-ACK transmission (short) PUCCH resource are {Positive SR, A / A}, {Positive SR, A / N}, {Positive SR, N / A}, {Positive SR, N / N }.

The remaining four sequences except for the four sequences in the HARQ-ACK transmission (short) PUCCH resource are {Negative SR, A / A}, {Negative SR, A / N}, {Negative SR, N / A}, It may correspond to {Negative SR, N / N}. In this case, the four sequences may be two sequences for HARQ-ACK only.

In the foregoing description, A / A, A / N, N / A, and N / N represent ACK / ACK, ACK / NACK, NACK / ACK, and NACK / NACK, respectively.

In the above configuration, the sequence corresponding to the (short) PUCCH resource or the UCI state for the SR and the HARQ-ACK may be transmitted over one or two OFDM symbols. UCI information may be repeatedly transmitted even though the actual transmission sequence between two symbols depends on a specific base sequence hopping or cyclic shift hopping.

In addition, when N sequences in an SR transmission (short) PUCCH resource are allocated, and the sequence indicates an SR only or Positive SR + specific HARQ-ACK state in some cases, the corresponding relationship between the UCI state and the N sequences may be It can be changed (by specific rules) on a slot and / or symbol basis.

In addition, when HARQ-ACK transmission (short) PUCCH resources include more than four sequence resources, two or more PRB resources with sequence resources may be configured. In particular, if there are 2N sequence resources, it includes N sequence resources for each PRB of two PRBs, and each N sequence in each PRB is equal (in terms of cyclic shift index) to a specific (Low PAPR / CM) sequence. It may be a sequence to which one of the N Cyclic shift values having an interval is applied.

In addition, the cyclic shift value may refer to a form in which a specific cyclic shift value of the low PAPR sequence is applied.

More specifically, when signal transmission is indicated so that the SR transmission (short) PUCCH resources and 1 or 2 bit (s) HARQ-ACK transmission (short) PUCCH resources have (partly) overlapping time axis resources, a single carrier, In order to satisfy the characteristic (Single carrier property) (or Low PAPR / CM characteristic), the UE may select and transmit one (joint) UCI state of the SR and the HARQ-ACK from a plurality of sequences.

Preferably, the SR PUCCH resource may include at least sequence resources for SR only transmission. In addition, HARQ-ACK transmission (short) PUCCH resources should be valid even if there is no SR request, HARQ-ACK transmission (short) PUCCH resources may include at least the Negative SR + sequence resources for a specific HARQ-ACK state have.

In this case, the sequence resources to express the positive SR + specific HARQ-ACK state among the (joint) UCI states for the SR and HARQ-ACK are any PUCCH among SR short PUCCH resources and HARQ-ACK short PUCCH resources. There may be a problem with setting up to be included in a resource. As two methods to solve this problem, the first method includes the SR transmission (short) PUCCH resource (Opt. 1, Opt. 2), the second method to include the HARQ-ACK transmission (short) PUCCH resource An alternative (Opt. 3, Opt. 4) may be considered.

The above-mentioned thirteenth SR transmission method is more generally summarized as follows.

SR transmission from the base station (short) PUCCH resources and log ₂ (N) bit (s) (where N = 2 or 4) HARQ-ACK transmission (short) PUCCH resources (some) signal transmission to have a time axis resource overlapping (partly) If this is indicated, the UE can transmit a (joint) UCI state of the SR and HARQ-ACK. In this case, the SR short PUCCH and the HARQ-ACK short PUCCH resource may support (joint) UCI state transmission for the SR and the HARQ-ACK as follows.

<1> Opt. A

<1-1> SR transmission (short) Transmission support for UCI states corresponding to SR only and HARQ-ACK (with positive SR) as PUCCH resources

<1-1-1> SR only may be represented by an on / off keying scheme for a (single) PUCCH resource or a (single) sequence set to a higher layer.

<1-1-2> SR only and All NACK (with positive SR) may be regarded as the same UCI state.

<1-1-3> ACK / NACK bundling (eg, logical AND operation) may be applied to HARQ-ACK (with positive SR).

<1-1-4> When the SR transmission (short) PUCCH resource is a sequence selection scheme, UCI states may be expressed as follows. In this case, the terminal may transmit a corresponding sequence to represent the corresponding UCI state.

<1-1-4-1> Opt. A-1: SR Transmission (short) PUCCH Resource Composed of 4 Sequences

<1-1-4-1-1> When N = 2

For example, when an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource is k, the two sequences may be equal to k in the PRB (k + L / 2) mod L in terms of a cyclic shift index. It may be corresponding Cyclic shift values. (Where L is the maximum number of cyclic shifts in the PRB)

<1-1-4-1-2> When N = 4

For example, the sequence corresponding to {Positive SR, N / N} may be a sequence corresponding to SR only.

<1-1-4-2> Opt. A-2: SR Transmission (short) PUCCH Resource Composed of Two Sequences

<1-1-4-2-1> When N = 2

<1-1-4-2-2> When N = 4

For example, one of the above sequences may correspond to a case in which a positive SR and an ACK / NACK bundling result (based on a logical AND operation) for 2 bits HARQ-ACK are NACK.

For example, the sequence corresponding to {Positive SR, A / N or N / A or N / N} may be a sequence corresponding to SR only.

<1-2> HARQ-ACK Transmission (short) Transmission support for UCI states corresponding to HARQ-ACK only and HARQ-ACK (with negative SR) per PUCCH resource

Here, each UCI state of HARQ-ACK only (for the same ACK / NACK information) and HARQ-ACK (with negative SR) may be regarded as the same UCI state.

<2> Opt. B

<2-1> SR transmission (short) Transmission support for UCI states corresponding to SR only as a PUCCH resource

Here, SR only may be represented by an on / off keying scheme for (single) PUCCH resource or (single) sequence set as a higher layer.

<2-2> HARQ-ACK Transmission (short) Transmission support for UCI states corresponding to HARQ-ACK only, HARQ-ACK (with positive SR), and HARQ-ACK (with negative SR) for each PUCCH resource

<3> Opt. C

<3-1> SR transmission (short) Transmission support for UCI states corresponding to SR only as PUCCH resources

<3-2> HARQ-ACK Transmission (short) Transmission support for UCI states corresponding to HARQ-ACK only and HARQ-ACK (with negative SR) per PUCCH resource

<3-3> Support for transmission of UCI states corresponding to HARQ-ACK (with positive SR) as a (short) PUCCH resource separately configured (with SR / HARQ-ACK PUCCH resource)

In this case, the (short) PUCCH resource may be configured in one of the following ways.

-Opt. C-1: Single resource setting per terminal

-Opt. C-2: set for each PUCCH resource set (for HARQ-ACK transmission) set to UE

-Opt. C-3: setting for each PUCCH format set in the terminal

-Opt. C-4: set for each PUCCH resource (for HARQ-ACK transmission) set to UE

In the above configuration, the transmission resource corresponding to All NACK (with positive SR) may be set identically or independently to the SR only transmission resource.

In addition, the HARQ-ACK transmission PUCCH resource may be a Long PUCCH (eg, PUCCH having a length of 4 symbols or more) for HARQ-ACK (up to 2 bits).

In the above-described thirteenth SR transmission method, the HARQ-ACK transmission PUCCH resource (or resource set) and the SR transmission (short) PUCCH resource may be configured through higher layer signals and / or DCI, and may be configured independently of each other. .

The following may be considered as an additional operation for the thirteenth SR transmission method. In this case, the UE sets one or more HARQ-ACK transmission PUCCH resource sets (via higher layer signals), includes one or more PUCCH resources in each HARQ-ACK transmission PUCCH resource, and each HARQ-ACK transmission PUCCH. It is assumed that a PUCCH format in a resource may be different.

1) Issue 1: Positive SR + HARQ-ACK Transmission Resource Setting Method

-Opt. 1-0: one for each terminal

-Opt. 1-1: HARQ-ACK transmission one set per PUCCH resource set

-Opt. 1-2: Set one by PUCCH Format

-Opt. 1-3: HARQ-ACK transmission one set per PUCCH resource

-Opt. 1-4: One for each SR transmission PUCCH resource (or SR process or SR procedure)

2) Issue 2: Relationship between Positive SR + HARQ-ACK Transmission Resource and SR Only Transmission Resource in the Case

2-1) Opt. 2-1: Utilize a resource corresponding to ‘All NACK’ of positive SR + HARQ-ACK transmission resources as ‘All NACK’ as SR only transmission resource (shared)

Opt. May be combined with 1-0.

Opt. It may be combined with 1-1 and may require additional information on which HARQ-ACK transmission PUCCH resource set is used for SR only for the Positive SR + All NACK transmission resource set in the resource set.

Opt. It may be combined with 1-2 and may need additional information on which PUCCH format positive SR + All NACK transmission resource is used as SR only.

Opt. It may be combined with 1-3 and may need additional information on which HARQ-ACK transmission PUCCH resource positive SR + All NACK transmission resource is used as SR only.

Opt. May be combined with 1-4.

2-2) Opt. 2-2: Utilizes resources set independently of Positive SR + HARQ-ACK transmission resources as SR only transmission resources

The thirteenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.14. 제14 SR 전송 방법3.14. Fourteenth SR Transmission Method

The UE selects N (eg N = 2 or 4) UCI states (eg S ₀ , S ₁ ,…, S _N-1 ) for HARQ-ACK (with or without SR) in N Cyclic shift indexes in the PRB. When selecting and transmitting one of these, the base station may set an initial cyclic shift index (ie, {0, 1, ..., L-1}) as the HARQ-ACK transmission (short) PUCCH resource. In this case, the UE may perform cyclic shift to UCI state mapping from a gentle shift by one of the following methods.

(1) Opt. 1: k = 0, 1,... , UCI state S _k for N-1 corresponds to Cyclic shift index (q + k * L / N) mod L

(2) Opt. 2: k = 0, 1,... , N-1 to obtain the Cyclic shift index (q + k * L / N) mod L, and the N Cyclic shift index values in ascending (or descending) order is CS ₀ , CS ₁ ,. , When CS _N-1 , k = 0, 1,... To map UCI state S _k to CS _k for N-1

Here, L (eg, 12) means the total number of cyclic shifts in the PRB.

More specifically, when the N UCI states are represented by N Cyclic shift indexes in the PRB and the base station indicates the initial cyclic shift index to the user equipment, the UCI state indicated by the user equipment (linearly) starts from the initial cyclic shift index. It may correspond to the increasing cyclic shift index sequentially.

In this case, when the value obtained by adding an increment to the initial cyclic shift index exceeds the total number of cyclic shifts L in the PRB, the UCI state may additionally correspond to a value to which a modulo operation for L is applied.

Alternatively, when the incremental value added to the initial cyclic shift index exceeds the total number of cyclic shifts L in the PRB, the UCI state obtains (linearly) increasing cyclic shift indexes from the initial cyclic shift index and then the cyclic shift index. The values may be sequentially corresponded to the rearranged values in ascending or descending order.

The 14th SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.15. 제15 SR 전송 방법3.15. 15th SR Transmission Method

Signal transmission so that the UE has an SR transmission (short) PUCCH resource and log ₂ (N) bit (s) (eg N> 4) HARQ-ACK transmission (short) PUCCH resources (partly) overlapping time axis resources In this case, the UE may express the SR related information as X bits (where X≥1) and add the X bits to the UCI payload to transmit the HARQ-ACK transmission (short) PUCCH resource.

In this case, the SR related information may include one or more of the following information.

(1) Whether positive SR or negative SR

(2) SR process index (corresponding) (ie information on which SR process corresponds to SR)

In this case, the terminal may transmit the SR related information as one of the following.

1) Only 1-bit SR is sent, indicating whether it is a positive / negative SR for the highest priority SR (process)

2) Send an X-bit (s) SR, either (a) send a bitmap whether the SR is positive or negative for each process (b), or (b) give the highest priority among SRs with a positive SR. Only positive SR information for the owned SR (process) can be sent. (At this time, (b) may be regarded as a negative SR for other SRs (process) except for the SR (process)).

More specifically, SR process # 1, SR process # 2, and SR process # 3 have a priority of # 1> # 2> # 3. SR process # 1 is negative SR, SR process # 2 is positive SR, SR When process # 3 is a positive SR, according to (a), the terminal may transmit '011' to the 3-bits SR, and according to (b), the terminal may transmit '010' to the 3-bits SR.

In the above configuration, when the X bits, which are the SR related information, are added as the UCI payload size, the maximum coding rate set for the HARQ-ACK short PUCCH resource may be exceeded. In this case, the terminal may perform one of the following operations. In the following description, A / N may mean HARQ-ACK.

<1> Opt 1: SR 1-bit + A / N bits

Here, the 1-bit SR may be SR information (eg, positive SR or negative SR) for the SR process having the highest priority among a plurality of (eg, X) SR processes.

<2> Opt 2: SR X-bit + bundled A / N bits

In this case, the bundling method may be a spatial domain A / N bundling.

<3> Opt 3: SR 1-bit + bundled A / N bits

In this case, the terminal may immediately perform the operation according to Opt 3 or, if the maximum coding rate is exceeded even though the above-described Opt 1/2 is applied, the terminal may perform the operation according to Opt 3 as a second step. .

<4> Opt. 4: Skip all SR transfers and send only A / N

<5> Opt. 5: SR 1-bit (or X bits) + (partial) A / N bits (i.e. omit some A / N bits)

Here, the X bits, which are the SR related information, may be related to a (short) PUCCH resource set selection process for HARQ-ACK transmission.

As a specific example, (at HARQ-ACK transmission), the UE selects one of the (plural) PUCCH resource sets based on the UCI payload size, and then the base station indicates a specific PUCCH resource to be actually transmitted in the selected PUCCH resource set using DCI. can do. In this case, when the terminal transmits the SR-related information with the HARQ-ACK, the terminal may select the PUCCH resource set in one of the following manner.

1> Opt. 1: Select based on (total) UCI payload size for HARQ-ACK and SR related information

Here, when another UCI type (other than HARQ-ACK and SR) is transmitted together (as the HARQ-ACK transmission (short) PUCCH resource), the UCI payload size for the UCI type is the (total) UCI payload size. Can be reflected in.

2> Opt. 2: Select based on UCI payload size for HARQ-ACK

3> In the above examples, the base station may set the PUCCH resource set for the UCI payload size range to the terminal (via a higher layer signal).

All operations of the aforementioned 15 th SR transmission method may be extended even when the UE simultaneously transmits the CSI and the SR.

More specifically, in case of collision with an SR transmission PUCCH resource (for 2 HARQ-ACK greater than HARQ-ACK) and a HARQ-ACK transmission (short) PUCCH resource on a time axis, the UE may report the X bits information for the SR. HARQ-ACK transmission (short) may be transmitted on a PUCCH resource. In this case, the UE may add the X bits information to the HARQ-ACK payload size and then transmit the coded bits for the summed UCI payload as a HARQ-ACK transmission (short) PUCCH resource.

In this case, the SR-related X bits may include information on not only whether the SR is requested, but also about which SR process (or service) the corresponding SR is.

The 15 th SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.16. 제16 SR 전송 방법3.16. 16th SR Transmission Method

In the present invention, the PUCCH for transmitting the uplink control information (UCI), such as HARQ-ACK or CSI for the PDSCH scheduled by DL assignment in the present invention according to the payload size and transmission duration (number of PUCCH transmission symbols) of the UCI Therefore, it is assumed that PUCCH format is divided as follows.

(1) PUCCH format 0

Supported UCI payload size: up to K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: 1 ~ X symbols (eg X = 2)

-Transmission structure: Consists of only UCI signal without DM-RS, and may be a structure in which a UE transmits a specific UCI state by selecting / transmitting one of a plurality of specific sequences.

(2) PUCCH format 1

Supported UCI payload size: up to K bits

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (eg Y = 4, Z = 14)

-Transmission structure: DM-RS and UCI are configured / mapped in different symbols in the form of TDM, and UCI multiplies a specific sequence by a modulation (eg QPSK) symbol. CS / OCC is applied to both UCI and DM-RS to support multiplexing between multiple UEs (within the same RB)

(3) PUCCH format 2

Supported UCI payload size: K bits or more (more than)

-Number of OFDM symbols constituting a single PUCCH: 1 ~ X symbols

-Transmission structure: DM-RS and UCI may be configured / mapped in the same symbol in FDM form, and the terminal may transmit a scheme by applying only IFFT (Inverse Fast Fourier Transform) without coded UCI bits without DFT (Discrete Fourier Transform). has exist

(4) PUCCH format 3

-Supported UCI payload size: K bits or more

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols

Transmission structure: DM-RS and UCI are configured / mapped in different symbols in the form of TDM, and the terminal transmits by applying DFT to coded UCI bits. UCC is applied to UCI in front of DFT and CS (or IFDM mapping) is applied to DM-RS to support multiplexing between multiple UEs.

(5) PUCCH format 4

-Supported UCI payload size: K bits or more

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols

-Transmission structure: DMRS and UCI can be configured / mapped in different symbols in the form of TDM, the terminal may be a structure that is transmitted without multiplexing between the UE by applying the DFT to the coded UCI bits

In the following description, an SR refers to a physical layer signal for which a terminal requests UL scheduling from a base station. In particular, a positive SR means a case where there is a UL scheduling request of the terminal, and a negative SR means a case where there is no UL scheduling request of the terminal.

According to the PUCCH format combination for the PUCCH resource (hereinafter SR SRCC) for SR (only) transmission and the PUCCH resource (hereinafter A / N PUCCH) for HARQ-ACK (only) transmission, the terminal is SR as follows. And HARQ-ACK may be simultaneously transmitted.

<1> A / N PUCCH = PUCCH format 0

<1-1> SR PUCCH = PUCCH format 0

-SR only or positive SR + HARQ-ACK is transmitted to SR PUCCH. In this case, the SR PUCCH may be set for each SR process.

-HARQ-ACK only or negative SR + HARQ-ACK transmitted by A / N PUCCH

<1-2> SR PUCCH = PUCCH format 1

-SR only is sent to SR PUCCH

-Positive SR + HARQ-ACK is transmitted in one of the following ways

-Opt. 1: Omit SR transmission and transmit HARQ-ACK only to A / N PUCCH

-Opt. 2: send to SR PUCCH

-Opt. 3: UE sets a separate PUCCH format 0 resource (other than SR PUCCH and / or A / N PUCCH) and transmits to the corresponding resource. Here, the separate resource may be set for each SR process.

<1-3> HARQ-ACK only or negative SR + HARQ-ACK transmitted by A / N PUCCH

<2> A / N PUCCH = PUCCH format 1

<2-1> SR PUCCH = PUCCH format 0

-SR only is sent to SR PUCCH

-Positive SR + HARQ-ACK is transmitted in one of the following ways

-Opt. 1: Omit SR transmission and transmit HARQ-ACK only to A / N PUCCH

-Opt. 2: send to SR PUCCH

-Opt. 3: Set a separate PUCCH format 1 resource (other than SR PUCCH and / or A / N PUCCH) and send it to the resource. Here, the separate resource may be set for each SR process.

-HARQ-ACK only or negative SR + HARQ-ACK transmitted by A / N PUCCH

<2-2> SR PUCCH = PUCCH format 1

-SR only or positive SR + HARQ-ACK is transmitted to SR PUCCH. Here, the SR PUCCH may be set for each SR process.

-HARQ-ACK only or negative SR + HARQ-ACK transmitted by A / N PUCCH

<3> A / N PUCCH =

PUCCH format

2 or 3 or 4

<3-1> SR PUCCH = PUCCH format 0

-SR only is sent to SR PUCCH

Positive SR + HARQ-ACK sent to A / N PUCCH in addition to UCI payload

-HARQ-ACK only or negative SR + HARQ-ACK transmitted by A / N PUCCH

<3-2> SR PUCCH = PUCCH format 1

-SR only is sent to SR PUCCH

Positive SR + HARQ-ACK sent to A / N PUCCH in addition to UCI payload

HARQ-ACK only or negative SR + HARQ-ACK is transmitted in A / N PUCCH. Here, the SR PUCCH may be set for each SR process.

In the above configurations, one of the options may be selectively applied according to a service type corresponding to the SR.

More specifically, the transmission type or PUCCH format for the PUCCH resources may vary in format 0 (sequence selection), format 1 (sequence modulation), format 2/3/4 (encoding / modulation), etc. as assumed in the present invention. When the PUCCH format of the PUCCH resource (hereinafter referred to as SR PUCCH) for SR transmission and the PUCCH format of the PUCCH resource (hereinafter referred to as A / N PUCCH) for HARQ-ACK transmission are used for simultaneous SR and HARQ-ACK transmission. Efficient methods for this may vary.

For example, when the PUCCH format is identical between the SR PUCCH and the A / N PUCCH, it may be efficient for the UE to transmit a positive SR + HARQ-ACK to the SR PUCCH (eg, resource selection). On the other hand, if the PUCCH format between SR PUCCH and A / N PUCCH is different and A / N PUCCH is one of PUCCH format 2/3/4, the UE may be positive SR + HARQ since the PUCCH format may contain many UCI payloads. It may be more efficient to send the -ACK on the A / N PUCCH.

Or, if the PUCCH format between the SR PUCCH and the A / N PUCCH is the same in terms of (supported) maximum UCI payload size but different in terms of the length of the transmitted (time axis of the PUCCH resource), the SR PUCCH is transmitted than the A / N PUCCH. If the length is long, the UE transmits a positive SR + HARQ-ACK to the SR PUCCH, otherwise the UE (per SR process) has the same PUCCH format as the PUCCH format of the A / N PUCCH resource (SR PUCCH and / or A / N). In addition to the PUCCH, it may be preferable to set a separate PUCCH resource (addition) and transmit a positive SR + HARQ-ACK to the resource in view of UL coverage.

In addition, when the SR PUCCH resource is a short PUCCH and the A / N PUCCH resource is a long PUCCH, the UE may support simultaneous SR and HARQ-ACK transmission as follows.

[1] SR only is sent on SR PUCCH

Here, the SR PUCCH may be set for each SR process.

[2] positive SR + HARQ-ACK is transmitted by one of the following methods

-Opt. 1: Method of transmitting to SR PUCCH according to service type corresponding to SR or to long PUCCH (per SR process) or separately set long PUCCH (particularly to SR PUCCH and / or A / N PUCCH). For example, the UE may transmit an SR PUCCH having a high low latency request (eg, URLLC SR) and an SR having a low low latency request (eg, eMBB SR) as a long PUCCH.

-Opt. 2: A method of transmitting to SR PUCCH or A / N PUCCH according to a service type corresponding to SR. For example, the UE may transmit an SR PUCCH having a high low latency request (eg, URLLC SR) and an SR having a low Low Latency request (eg, eMBB SR) to the A / N PUCCH.

[3] HARQ-ACK only or negative SR + HARQ-ACK is transmitted through A / N PUCCH

The above configurations may be extended even when the terminal simultaneously transmits the CSI and the SR.

In addition, according to the PUCCH format combination configured for PUCCH resources (hereinafter, SR PUCCH) for SR (only) transmission and PUCCH resources (hereinafter, A / N PUCCH) for HARQ-ACK (only) transmission, the UE is as follows. HARQ-ACK may support simultaneous transmission.

(A) SR PUCCH = PUCCH format 0

(A-1) A / N PUCCH = PUCCH format 0

-Opt. 1: Transmit positive SR + HARQ-ACK information from the A / N PUCCH resource to the implicit PUCCH resource. Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 0 resource derived by applying a CS (cyclic shift) offset (or PRB offset) to the A / N PUCCH resource. Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource), and may further transmit HARQ-ACK according to a sequence selection method to the corresponding resource.

(A-2) A / N PUCCH = PUCCH format 1

-Opt. 1: Transmit positive SR + HARQ-ACK information from the A / N PUCCH resource to the implicit PUCCH resource. Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 1 resource derived by applying CS offset (or orthogonal cover code (OCC) offset or PRB offset) to A / N PUCCH resource. . Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource) and may further transmit HARQ-ACK according to a sequence modulation scheme to the corresponding resource.

-Opt. 2: Transmit positive SR + HARQ-ACK information to SR PUCCH resource (or PUCCH resource implied from SR PUCCH resource). Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 0 resource set as an SR PUCCH resource (or derived by applying a CS offset (or PRB offset) to an SR PUCCH resource). Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource), and may further transmit HARQ-ACK according to a sequence selection method to the corresponding resource.

-Opt. 3: Omit SR transmission and transmit HARQ-ACK information to A / N PUCCH resource

-Opt. 4: Omit HARQ-ACK transmission and transmit SR information to SR PUCCH resource

-Opt. 5: HARQ-ACK information is transmitted to the A / N PUCCH resources, SR information is transmitted using the CS offset (or phase difference) information between the DM-RS symbol (s) in the A / N PUCCH. Here, the phase difference between the DM-RS symbols in the A / N PUCCH may be a form of multiplying a modulation (eg, differential phase shift keying) symbol for SR information according to a differential encoding scheme.

(A-3) A / N PUCCH =

PUCCH format

2 or 3 or 4

-Opt. 1: After indicating SR information in explicit bit (s) to include in UCI payload, transmit positive SR + HARQ-ACK information to A / N PUCCH resource. In this case, when the base station configures a plurality of SR processes (or configurations) for the UE, the SR information may include information on whether an SR exists and on which SR process (or configuration) an SR exists.

(B) SR PUCCH = PUCCH format 1

(B-1) A / N PUCCH = PUCCH format 0

-Opt. 1: Transmit positive SR + HARQ-ACK information from the A / N PUCCH resource to the implicit PUCCH resource. Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 0 resource derived by applying a CS offset (or PRB offset) to the A / N PUCCH resource. Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource), and may further transmit HARQ-ACK according to a sequence selection method to the corresponding resource.

-Opt. 2: Transmit positive SR + HARQ-ACK information to SR PUCCH resource (or PUCCH resource implied from SR PUCCH resource). Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 1 resource set as an SR PUCCH resource (or derived by applying a CS offset (or OCC offset or PRB offset) to the SR PUCCH resource). have. Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource) and may further transmit HARQ-ACK according to a sequence modulation scheme to the corresponding resource.

(B-2) A / N PUCCH = PUCCH format 1

-Opt. 1: transmit positive SR + HARQ-ACK information to an SR PUCCH resource (or a PUCCH resource implied by the SR PUCCH resource). Here, the PUCCH resource (transmitting positive SR + HARQ-ACK) may be a PUCCH format 0 resource set as an SR PUCCH resource (or derived by applying a CS offset (or PRB offset) to an SR PUCCH resource). Accordingly, the UE may express a positive SR by selecting and transmitting a corresponding resource (not an A / N PUCCH resource), and may further transmit HARQ-ACK according to a sequence selection method to the corresponding resource.

(B-3) A / N PUCCH =

PUCCH format

2 or 3 or 4

In the above configurations, the terminal may transmit the SR only to the SR PUCCH, and may transmit HARQ-ACK only or negative SR + HARQ-ACK to the A / N PUCCH.

In addition, in the present invention, the sequence selection method may refer to a method in which the UE expresses the UCI state by selecting and transmitting one of a plurality of specific sequences.

In addition, in the present invention, the sequence modulation scheme may refer to a scheme in which the UE expresses the UCI state in the form of multiplying a specific sequence by a modulation (for example, QPSK) symbol.

In addition, in the present invention, an SR process (or configuration) may refer to resource configuration in a time / frequency / code domain for transmitting a scheduling request (SR) for a specific service. The plurality of SR processes (or configurations) may mean SR information for different services.

In addition, in the present invention, deriving another PUCCH resource by applying CS offset / OCC offset / PRB offset to a specific PUCCH resource, the rest is the same for the specific PUCCH resource, only the CS index / OCC index / PRB index constant offset As much as the difference can mean that the PUCCH resources are derived.

Additionally, the base station sets a plurality of PUCCH resource sets (terminal specific) (as a higher layer signal) to the terminal, and the terminal sets one PUCCH resource set (utilized for UCI transmission) among the plurality of PUCCH resource sets according to the UCI payload size. When selecting, SR information may be excluded from the UCI payload for selecting the PUCCH resource set. As an example, the UE may perform PUCCH resource set selection based on the total UCI payload size for HARQ-ACK and CSI.

At this time, the UE additionally based on a specific indicator (eg, ACK / NACK resource indication field) in the DCI (and information implied from the DCI (eg, CCE (Control Channel Element) index, PDCCH candidate index, etc.)). As a specific PUCCH resource in the selected PUCCH resource set can be selected. For example, the A / N PUCCH resource is PUCCH format 0 (or format 1), and a positive SR + HARQ-ACK (up to 2 bits) transmission is a PUCCH resource (of the same PUCCH format) implied from the A / N PUCCH resource. In case that the transmitting operation is supported, if the SR information is included in the UCI payload which is a reference when the PUCCH resource set is selected, the UE has no choice but to determine positive SR + 2 bits HARQ-ACK as a UCI payload of 3 bits or more. Accordingly, the UE selects only a PUCCH resource set configured of PUCCH format 2/3/4, and transmits a positive SR + 2 bits HARQ-ACK to PUCCH format 0 (or format 1) implied from A / N PUCCH resources. There will be no.

Alternatively, when the UE selects a PUCCH resource set, if only 2 bits HARQ-ACK exists, the UE excludes SR information from the PUCCH resource set selection process (ie, selects a PUCCH resource set corresponding to 2 bits), otherwise The terminal may select the PUCCH resource set based on the UCI payload size including all HARQ-ACK, SR, and CSI.

In addition, in order to support simultaneous transmission of N (= 1 or 2) bits HARQ-ACK and the SR, the base station transmits (short) PUCCH resources of a format 0 structure composed of M (= 2 or 4) sequences to the UE. (Hereinafter SR-PUCCH) can be set (for a specific SR process). In this case, in case of SR only, the terminal sets one sequence among the M sequences and transmits it by OOK (on / off keying) method, and in case of HARQ-ACK + positive SR, the terminal is ^2N out of M. The UCI state can be expressed by using a sequence of sequences using a sequence selection method (ie, transmitting a specific UCI state by selecting / transmitting one of K sequences). In this case, the terminal may additionally support the following operation.

<A> A scheme for changing the sequence representing the SR only state in the SR-PUCCH by slot and / or symbol unit (according to a specific pattern) (that is, {+, DTX} -to-Sequence mapping unit by slot and / or symbol unit). (Depending on a specific pattern), for example) (eg randomization). Here, '+' means positive SR.

<B> Scheme of configuring frequency resource of SR-PUCCH to hopping by slot and / or symbol unit (according to specific pattern) (eg randomization)

The frequency resource of the (short) PUCCH may be hopping based on a specific frequency resource Granularity (eg, X (= 8 or 16) PRB). For example, in addition to the reference frequency resource, a frequency offset of an X (= 8 or 16) PRB multiple that is changed per slot and / or symbol unit may be applied. In this case, X may be a value promised in advance between the base station and the terminal or a value set by the base station as a higher layer signal (eg, RRC signaling).

Frequency resource hopping according to the slot and / or symbol is applied only to (short) PUCCH resources that are semi-statically configured (via higher layer signals such as RRC signaling), and the DCI and DCI (such as RRC signaling) May not be applied to (short) PUCCH resources that can be dynamically indicated.

The sixteenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.17. 제17 SR 전송 방법3.17. 17th SR Transmission Method

When the base station configures a plurality of scheduling request (SR) processes (or configurations) (which may cause SR transmission at the same time), the terminal may simultaneously support SR and HARQ-ACK transmission in one or more of the following ways. Can be.

(1) Opt. 1: A plurality of PUCCH resources corresponding to the plurality of SR processes (or configurations) are derived from an A / N PUCCH resource according to an implicit rule, and the UE corresponds to a single SR process (or configuration) (A / N PUCCH resources Scheme for transmitting positive SR + HARQ-ACK information to PUCCH resources

The UE may select and transmit one of a plurality of PUCCH resources to express a positive SR for a specific SR process (or SR configuration), and may further transmit HARQ-ACK on the corresponding resource.

In this case, the implicit rule may mean a method of deriving a plurality of PUCCH resources corresponding to a plurality of SR processes (or configurations) by applying CS offset / OCC offset / PRB offset to A / N PUCCH resources.

(2) Opt. 2: BS sets SR PUCCH for each SR process (or configuration) for the plurality of SR processes (or configurations), and UE performs positive SR + HARQ-ACK with SR PUCCH resources corresponding to a single SR process (or configuration) Transmission method

The UE may select and transmit a specific SR PUCCH resource to express a positive SR for a corresponding SR process (or SR configuration), and may further transmit HARQ-ACK on the corresponding resource.

In this case, the operation may be applied only when the SR PUCCH resource has a specific PUCCH format (for example, PUCCH format 1).

(3) Opt. 3: configuring multi-bits SR information for the plurality of SR processes (or configurations) and including multi-bits SR information in the UCI payload when transmitting HARQ-ACK to transmit multi-bits SR + HARQ-ACK information to A / N PUCCH resources measures

The multi-bits SR includes information on whether a positive / negative SR and which SR process (or configuration) exist and / or all or some of the plurality of SR processes (or configurations); The configuration may include positive / negative SR information for each SR process (or configuration).

The base station determines (at the same time) that at least one SR process (or configuration) is a positive SR or that all the plurality of SR processes (or configurations) are negative SRs to the UE through (terminal specific) higher layer signal (eg, RRC signaling). It may be configured to report the recognition information, or to report the multi-bits SR information for a plurality of SR processes (or configurations).

The base station sets a plurality of PUCCH resource sets (terminal specific) (as a higher layer signal) to the terminal, and the terminal uses one PUCCH resource set (utilized for UCI transmission) among the plurality of PUCCH resource sets according to the UCI payload size. In case of selection, the multi-bit SR information (when the base station sets up the multi-bit SR transmission) may be included in the UCI payload for selecting the PUCCH resource set.

In the present invention, the PUCCH resources indicated for HARQ-ACK (only) transmission are called A / N PUCCH resources, and the PUCCH resources indicated for SR (only) transmission are called SR PUCCH resources.

In addition, in the present invention, SR PUCCH, A / N PUCCH means resources set for SR only, HARQ-ACK only transmission, respectively, the terminal transmits SR only to SR PUCCH, HARQ-ACK only or negative SR + HARQ-ACK can be transmitted on the A / N PUCCH.

In addition, the terminal derives another PUCCH resource by applying CS offset / OCC offset / PRB offset to a specific PUCCH resource. The other PUCCH resources are the same for the specific PUCCH resource, and only the CS index / OCC index / PRB index differs by a predetermined offset. I can mean to derive the PUCCH resource.

More specifically, when the UE performs simultaneous SR and HARQ-ACK transmission, if the PUCCH resource configured for SR only is PUCCH format 0, the UE is a positive SR + HARQ-ACK as a PUCCH resource derived from A / N PUCCH resource If the information is transmitted and the PUCCH resource configured for SR only is PUCCH format 1, the UE may transmit positive SR + HARQ-ACK information to the SR PUCCH resource.

When the base station configures a plurality of SR processes (or configurations) for the terminal, the terminal further includes not only positive SR information but also information on which SR process (or configuration) is the SR process (or configuration) that is the positive SR. Reporting to may be a way to reduce the UL scheduling delay of the base station. For example, if the UE reports only positive / negative SR information to the base station (if it is a positive SR) and does not provide additional information on which SR process is a positive SR, the base station again sends a buffer status report (BSR) after the SR transmission. Only after receiving the service will the service type corresponding to the corresponding positive SR be known. Accordingly, UL scheduling delay may be caused.

Accordingly, the terminal according to the present invention may further inform which SR process (or configuration) the positive SR information is together with the positive / negative SR information.

Specifically, when the terminal transmits the positive SR + HARQ-ACK information to the PUCCH resources derived from the A / N PUCCH resources, the terminal applies a plurality of CS offset / OCC offset / PRB offset to the A / N PUCCH, etc. A plurality of PUCCH resources corresponding to the number of SR processes (or configurations) may be derived, and positive SR + HARQ-ACK information may be transmitted to a specific PUCCH resource among the plurality of PUCCH resources.

Alternatively, when the terminal transmits positive SR + HARQ-ACK information as SR PUCCH resources, SR PUCCH resources for each SR process (or configuration) corresponding to a plurality of SR processes (or configurations) may be preset. Accordingly, the terminal may transmit positive SR + HARQ-ACK information to a specific PUCCH resource among the plurality of PUCCH resources. In this case, the UE expresses a positive SR for a specific SR process (or configuration) by selecting a specific single PUCCH resource among a plurality of PUCCH resources (corresponding to a plurality of SR processes (or configurations)) and uses HARQ as the selected resource. -ACK can be additionally transmitted.

As another method, when the base station configures a plurality of SR processes (or configurations) for the terminal, the terminal may include information on whether a positive / negative SR and which SR process (or configuration) exist for the plurality of SR processes. (Or configuration) multi-bits SR information including positive / negative SR information per SR process (or configuration) for all or some SR processes (configurations) by adding to the UCI payload to the multi-bits SR + HARQ -ACK may be transmitted to the A / N PUCCH resource.

The seventeenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.18. 제18 SR 전송 방법3.18. 18th SR Transmission Method

When the PUCCH (s) (eg A / N PUCCH, SR PUCCH, CSI PUCCH) for different UCI types to be transmitted by the UE overlap only for some symbols on the time axis (eg partial overlapping), the UE UCI multiplexing may be performed to the base station (as a single PUCCH resource).

In the present invention, the PUCCH resource configured for UCI type (only) (hereinafter UCI A) transmission having the highest priority among the UCI types is named PUCCH A, and the UE is UCI multiplexed for a specific UCI type (s) set S. The PUCCH resource selected under the assumption that s is performed is named PUCCH B. In this case, in the initial state, S may include all UCI type (s), and PUCCH B may be a PUCCH resource in the case of assuming UCI multiplexing for all UCI type (s).

(1) When PUCCH A = PUCCH B

For the UCI type (s) in the set S, the UE is before a specific time corresponding to the (minimum) UL timing (or UE processing time) for the corresponding UCI type (or PUCCH) based on the PUCCH A transmission time point and the Perform UCI multiplexing on the UCI type (or PUCCH) indicated by UL transmission before the point in time (included in set S), and exclude the UCI type not included in UCI multiplex (except in set S).

For example, when the PUCCH B is changed, the UE repeatedly applies the aforementioned 18 th SR transmission method to the changed set S and PUCCH B.

As another example, when the PUCCH B is not changed, the UE transmits the UCI multiplexing information for the UCI type (s) in the set S to the PUCCH B.

(2) When PUCCH A ≠ PUCCH B

(2-1) A time before a specific time corresponding to (minimum) UL timing (or UE processing time) for UCI A (or PUCCH A) on the basis of PUCCH B transmission time point and UCI A (or PUCCH in the past than the time point) If the UL transmission for A) is indicated,

For the UCI type (s) in the set S, the UE is before a specific time corresponding to the (minimum) UL timing (or UE processing time) for the corresponding UCI type (or PUCCH) based on the PUCCH B transmission time point and the Perform UCI multiplexing (included in set S) for UCI types (or PUCCHs) indicated by UL transmissions earlier than the time point, and exclude UCI types that are not in UCI multiplex (except in set S).

(2-2) UCI A (or PUCCH A) after a specific time corresponding to (minimum) UL timing (or UE processing time) for UCI A (or PUCCH A) on the basis of PUCCH B transmission time If UL transmission is indicated, the UE can search for a new S and a new PUCCH B that satisfy the following conditions.

Condition: A time before a specific time corresponding to (minimum) UL timing (or UE processing time) for UCI A (or PUCCH A) on the basis of PUCCH B transmission time point and UCI A (or PUCCH A) in the past than the time point UL transmission directed to

Here, the smallest UCI multiplexing target UCI type (s) set S that satisfies the above condition may be UCI A only, and PUCCH B = PUCCH A at this time.

The terminal may perform the discovery process while sequentially excluding the UCI type based on the priority between UCI type (s).

In this case, the terminal may apply (2-1) of the above-described 18 th SR transmission method based on the new S and the PUCCH B.

In the present invention, SR PUCCH, A / N PUCCH, and CSI PUCCH mean resources configured for SR only, HARQ-ACK only, and CSI only transmission, respectively.

In addition, in the present invention, the priority between the UCI types is HARQ-ACK> CSI> SR, or the PUCCH transmission time corresponding to each UCI type gets higher priority or corresponds to each UCI type. It is assumed that a later UL transmission indication time can have a higher priority.

In addition, when determining the PUCCH B resource, the PUCCH B resource may be determined depending only on the combination of UCI multiplexing target UCI type (s) in a state in which UL timing information is excluded.

As a specific example, when the SR PUCCH and the A / N PUCCH overlap only for some symbols on the time axis, the UE assumes priority with A / N PUCCH> SR PUCCH (or HARQ-ACK> SR) and operates as follows. Can be.

1) When a positive SR occurs within a certain time interval corresponding to UL timing (or UE processing time) based on A / N PUCCH transmission timing (minimum), the UE omits SR transmission and transmits only HARQ-ACK information.

2) A / N PUCCH transmission time criterion (minimum) When a positive SR occurs within a certain time interval corresponding to UL timing (or UE processing time), the UE transmits UCI multiplexing information between the SR and the HARQ-ACK. Here, the method of the UE transmitting the information in which the SR and the HARQ-ACK are UCI multiplexed (for example, positive SR + HARQ-ACK) may follow the aforementioned 16 th SR transmission method.

According to this method, the UE is instructed so that a plurality of PUCCH transmissions for a plurality of UCI types are overlapped for at least some symbols, and the UE can transmit UCI multiplexing some or all UCI information for the plurality of UCI types. If there is, transmission of the highest priority UCI type (UCI A) among the plurality of UCI types is always guaranteed and UCI multiplexing on UCI types that are ready in terms of UL timing (or UE processing time) is possible. Can be supported.

Additionally, (Case 1) where multiple PUCCHs with different start symbols and / or transmission durations partially overlap in some time resources and (Case 2) having different start symbols and / or transmission durations When the PUCCH and the PUSCH partially overlap in some time resources, the UE may operate as follows in each case. In this case, at least one PUCCH in Case 1 and Case 2 may be a PUCCH for HARQ-ACK transmission.

<1> Case 1

<1-1> When UE processing time (or UL timing) for HARQ-ACK transmission is sufficient

-Transmitting a plurality of UCIs configured to be transmitted to the plurality of PUCCH resources (of the plurality of PUCCHs) to a single PUCCH resource (by UCI multiplexing) selected by a promised scheme (according to a combination of UCI types for a plurality of UCIs).

<1-2> Insufficient UE processing time (or UL timing) for HARQ-ACK transmission

-Transmit only a single high priority PUCCH among multiple PUCCH resources and omit the remaining PUCCHs

<2> Case 2

<2-1> When UE processing time (or UL timing) for HARQ-ACK transmission is sufficient

-UCI piggybacked UCI (eg HARQ-ACK) configured to be transmitted on PUCCH by PUSCH

<2-2> Insufficient UE processing time (or UL timing) for HARQ-ACK transmission

Omit PUSCH transmission and transmit PUCCH

Alternatively, the UE may perform rate matching or puncturing on the PUCCH or the PUSCH with respect to some symbols overlapping between the PUCCHs or between the PUSCH and the PUCCH.

Additionally, when the PUCCH (s) (eg A / N PUCCH, SR PUCCH, CSI PUCCH) for different UCI types to be transmitted by the UE overlap only for some symbols on the time axis (eg partial overlapping), the UE UCI multiplexing may be performed as follows to transmit to a base station (as a single PUCCH resource).

In the present invention, SR PUCCH, A / N PUCCH, and CSI PUCCH mean PUCCH resources configured and / or indicated for SR (only), HARQ-ACK (only), and CSI (only) transmission, respectively.

In the present invention, PF0, PF1, PF2, PF3, and PF4 mean PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, and PUCCH format 4, respectively.

In addition, in the present invention, PF X / Y means PF X or PF Y.

In addition, in the present invention, the meaning that a positive SR has occurred may mean that the UE has generated UL data to be transmitted or has determined to request UL scheduling.

1> Case 1: A / N PUCCH and SR PUCCH overlap

1-1> A / N PUCCH is PF2 / 3/4 and SR PUCCH is PF0 / 1

UCI including HARQ-ACK bit (s) and explicit SR bit (s) is transmitted to A / N PUCCH

At this time, the explicit SR bit (s) may include the following information on the basis of the A / N PUCCH transmission (start) time T.

If a positive SR occurs before and after TT ₀ , the explicit SR bit (s) indicates positive SR information.

If a positive SR occurs after TT ₀ (before T), the explicit SR bit (s) indicates negative SR information.

If no positive SR occurs before time T, the explicit SR bit (s) indicates negative SR information.

1-2> A / N PUCCH is PF0 and SR PUCCH is PF0

-T based on A / N PUCCH transmission (start)

If a positive SR occurs before and after TT ₀ , the UE transmits HARQ-ACK information to the PF0 resource (obtained from A / N PUCCH). Here, the PF0 resource is applied to the A / N PUCCH resource (eg, PF0 resource) by applying a physical resource block (PRB) index offset and / or a CS (cyclic shift) index offset and / or an orthogonal cover code (OCC) index offset. It may be a PF0 resource obtained.

-If a positive SR occurs after TT ₀ , the UE skips the SR transmission and transmits HARQ-ACK (only) to the A / N PUCCH

If no positive SR occurs before time T, the UE transmits HARQ-ACK (only) information to A / N PUCCH

1-3> A / N PUCCH is PF0 and SR PUCCH is PF1

1-3-1> Opt. 1: T based on A / N PUCCH transmission (start)

1-3-2> Opt. 2: T based on SR PUCCH transmission (start)

If HARQ-ACK transmission is indicated before and at TT ₀

In case of HARQ-ACK + negative SR (or HARQ-ACK only), the UE transmits HARQ-ACK information to the A / N PUCCH.

If HARQ-ACK + positive SR, the UE transmits HARQ-ACK information to the SR PUCCH. Here, HARQ-ACK information may be transmitted by multiplying a specific QPSK modulation symbol by (all or in part) UCI sequence (s) in the SR PUCCH.

If HARQ-ACK transmission is indicated after TT ₀ , the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH.

1-4> When A / N PUCCH is PF1 and SR PUCCH is PF0, A / N PUCCH transmission (start) based on time T,

1-4-1> If positive SR occurred at or before TT ₀ ,

-Opt. 1: Omit SR transmission and transmit HARQ-ACK (only) to A / N PUCCH

-Opt. 2: Send HARQ-ACK information to PF1 resource. In this case, the PF1 resource may be configured by applying a physical resource block (PRB) index offset and / or a CS (cyclic shift) index offset and / or an orthogonal cover code (OCC) index offset to an A / N PUCCH resource (eg, PF1 resource). It can be the PF1 resource obtained.

-Opt. 3: HARQ-ACK information is transmitted to the A / N PUCCH, SR information is represented by a method of changing a specific UCI sequence or DM-RS sequence in the A / N PUCCH or a method of multiplying the DM-RS by DPSK modulation symbols . Here, the method of changing the UCI sequence or the DM-RS sequence by the terminal may be a method of changing the base sequence or the CS (cyclic shift).

1-4-2> If a positive SR occurs after TT ₀ , the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH.

1-4-3> If no positive SR occurs before time T, the UE transmits HARQ-ACK (only) information to A / N PUCCH

1-5> When A / N PUCCH is PF1 and SR PUCCH is PF1,

1-5-1> A / N PUCCH transmission (start) At time T,

1-5-1-1> If a positive SR occurred at or before TT ₀ ,

-Opt. 1: Omit SR transmission and transmit HARQ-ACK (only) to A / N PUCCH

-Opt. 4: Send HARQ-ACK information to SR PUCCH. In this case, the HARQ-ACK information may be transmitted by multiplying a specific QPSK modulation symbol by the UCI sequence in the SR PUCCH. In addition, the Opt. The operation of 4 is applied only when the SR PUCCH is later than or equal to the transmission time of the A / N PUCCH (or when the SR PUCCH transmission interval is included in the A / N PUCCH transmission interval). Otherwise, the UE omits SR transmission and HARQ-ACK (only) information may be transmitted through A / N PUCCH.

1-5-1-2> If a positive SR occurs after TT ₀ , the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH.

1-5-1-3> If a positive SR has not occurred before the time point T, the UE transmits HARQ-ACK (only) information to the A / N PUCCH.

1-5-2> Opt. 2: based on the T at the time of the SR PUCCH transmission (start)

1-5-2-1> When HARQ-ACK transmission is indicated at or before TT ₀ ,

1-5-2-1-1> In case of HARQ-ACK + negative SR (or HARQ-ACK only), the UE transmits HARQ-ACK information to the A / N PUCCH.

1-5-2-1-2> In case of HARQ-ACK + positive SR, the UE transmits HARQ-ACK information to the SR PUCCH. Here, the UCI sequence in the SR PUCCH transmitting HARQ-ACK information may be transmitted by multiplying a specific QPSK modulation symbol.

In addition, when the (transmission) end time of the SR PUCCH is delayed by a predetermined time T _d after the (transmission) end time of the A / N PUCCH, the UE omits SR transmission and transmits HARQ-ACK (only) to the A / N PUCCH. Can be. In this case, the predetermined time T _d may be a predetermined value or a value set by the base station.

1-5-2-2> If HARQ-ACK transmission is instructed after the TT ₀ time point, the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH

2> Case 2: A / N PUCCH and CSI PUCCH overlap

2-1> A / N PUCCH is PF0 / 1 and CSI PUCCH is PF2 / 3/4

-UE omits CSI transmission and transmits HARQ-ACK (only) to A / N PUCCH

2-2> A / N PUCCH is PF2 / 3/4 and CSI PUCCH is PF2 / 3/4

UE transmits UCI including HARQ-ACK bit (s) and CSI bit (s) to A / N PUCCH. Here, when the transmission (start) time point for the A / N PUCCH is T ₁ and the transmission (start time) time point for the CSI PUCCH is T ₂ , the (time axis) CSI reference resource for the CSI is T ₁ -T _0. It may be the fastest DL slot present at and before the T ₂ -T _CQI point. Also, (valid) DL slot refers to a slot configured as a DL slot (to a terminal) and / or a slot not included in a measurement gap (eg, a measurement gap) and / or a DL bandwidth part (BWP) where CSI reporting is performed. It may mean a slot included in the same DL BWP. In addition, T _CQI may be a value previously set between the base station and the terminal or a value set by the base station to the terminal.

When the A / N PUCCH carries HARQ-ACK information on the semi-persistent scheduling (SPS) PDSCH, the UE may perform UCI multiplexing as follows.

On the basis of the transmission time T of the CSI PUCCH,

If HARQ-ACK transmission is indicated before and at TT ₀ , the UE transmits the UCI including the HARQ-ACK bit (s) and the CSI bit (s) to the CSI PUCCH. In this case, when there are a plurality of CSI PUCCH resource (s), a (single) CSI PUCCH resource for transmitting the HARQ-ACK bit (s) and the CSI bit (s) may be selected.

If HARQ-ACK transmission is indicated after TT ₀ , the UE omits CSI transmission and transmits HARQ-ACK (only) to A / N PUCCH.

3> Case 3: A / N PUCCH, CSI PUCCH, and SR PUCCH overlap

3-1> In case the A / N PUCCH is PF0 / 1, the UE skips CSI transmission and sets the PUCCH resource combination (from the PUCCH format perspective) set / instructed for HARQ-ACK and SR. Follow the action

3-2> When A / N PUCCH is PF2 / 3/4 and CSI PUCCH is PF2 / 3/4,

3-2-1> UE can transmit UCI including HARQ-ACK bit (s), CSI bit (s), and explicit SR bit (s) to A / N PUCCH.

In this case, when the transmission (starting) time point for the A / N PUCCH is T ₁ and the transmission (starting) time point for the CSI PUCCH is T ₂ , the (time axis) CSI reference resource for the CSI is T ₁ -T. _It may be the fastest DL slot existing at and before the ₀ time point and present at and before the T ₂ -T _CQI time point. Here, (valid) DL slot refers to a slot configured as a DL slot (to a terminal) and / or a slot not included in a measurement gap (eg, a measurement gap) and / or a DL bandwidth part (BWP) where CSI reporting is performed. It may mean a slot included in the same DL BWP. In addition, T _CQI may be a value previously set between the base station and the terminal or a value set by the base station to the terminal.

In addition, the explicit SR bit (s) may include the following information on the basis of the A / N PUCCH transmission (start) time T1.

3-2-2> When the A / N PUCCH includes HARQ-ACK information for the SPS PDSCH, the UE may perform UCI multiplexing as follows.

Based on the CSI PUCCH transmission time T,

If HARQ-ACK transmission is indicated before and at TT ₀ , the UE transmits a HARQ-ACK bit (s), a CSI bit (s), and a UCI including an explicit SR bit (s) to the CSI PUCCH. In this case, when there are a plurality of CSI PUCCH resource (s), a (single) CSI PUCCH resource for transmitting the HARQ-ACK bit (s) and the CSI bit (s) may be selected.

If HARQ-ACK transmission is indicated after TT ₀ , the UE follows the UCI multiplexing rule between HARQ-ACK and SR after omitting CSI transmission (or follow the operation of Case 1 described above).

In the above configurations, the time axis unit for T and / or T ₀ may be a slot and / or an OFDM symbol, in particular T ₀ corresponds to (minimum) UL timing or UE processing time for HARQ-ACK transmission. It may be time or time corresponding to (minimum) UL timing or UE processing time required when the UE changes PUCCH resources and transmits the same. The T ₀ value may be determined in a predetermined manner (depending on UE capability, etc.) or may be a value set by a base station.

In addition, A / N PUCCH when not otherwise specified in the above description may be a PUCCH resource for transmitting HARQ-ACK information on the PDSCH scheduled based on DL assignment (or DL scheduling DCI).

In addition, in Case 1, the UE may arbitrarily transmit only HARQ-ACK only to A / N PUCCH (depending on the implementation of the terminal) or UCI multiplexes HACK-ACK and SR to a promised PUCCH resource.

The eighteenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.19. 제19 SR 전송 방법3.19. 19th SR Transmission Method

The base station transmits a PUCCH transmission period (in OFDM symbol units) to PUCCH resources (hereinafter SR PUCCH) for transmitting a scheduling request (SR) to a terminal (via (terminal specific) higher layer signal (eg, RRC signaling)) and / or When it is possible to set (SR) PUCCH transmission start (OFDM) symbol and / or PUCCH transmission length (in OFDM symbol), etc., in a slot, the user equipment (OFDM symbol unit) (for SR transmission) can be configured. I) The (relative) PUCCH transmission start (OFDM) index in the PUCCH transmission period can be derived and applied as follows.

Where N ₀ , N _period , N _offset , and N _duration are the (relative) PUCCH transmission start (OFDM) symbols (OFDM symbol index) in the PUCCH transmission period (in OFDM symbol units) (set for SR transmission), respectively. A) means a PUCCH transmission period, a (SR) PUCCH transmission start (OFDM) symbol in a slot, and a PUCCH transmission length (in OFDM symbol units).

In addition, a slot means a basic scheduling unit composed of a plurality of (contiguous) OFDM symbols. For example, one slot may include 14 OFDM symbols.

In the present invention, the terminal may expect that the base station does not set the SR transmission period PUCCH transmission period shorter than the PUCCH transmission length for the PUCCH resources (that is, N _period ≥ N _duration ).

In the present invention, the (SR) PUCCH transmission start (OFDM) symbol in a slot (configured for SR transmission) is a transmission start (OFDM) symbol of a PUCCH resource set to the UE by the base station and And / or a separate time axis offset (eg SR offset) value.

Also, in the present invention, the (relative) PUCCH transmission start (OFDM) symbol in the PUCCH transmission period (in OFDM symbol units) for SR PUCCH is an (OFDM) symbol in Local indexing defined within the PUCCH transmission period. It can mean (index).

More specifically, in the NR system according to the embodiment of the present invention, 14 (contiguous) OFDM symbols constitute one slot, and the OFDM symbol Index in the slot is 0, 1, 2,... , 13 may be set. In this case, the base station transmits PUCCH transmission period for SR transmission to the UE with 7 OFDM symbols (N _period = 7), PUCCH transmission length with 2 OFDM symbols (N _duration = 2), and PUCCH in slots. The transmission start symbol (N _offset = 6) may be set to 6.

If the UE determines the PUCCH start symbol (for N ₀ ) in the PUCCH transmission period (N ₀ ) by simply modulo operation for the transmission period (eg N ₀ = 6 mod 7 = 6), two The first symbol of the SR PUCCH having a symbol length may be transmitted as an OFDM symbol (index) 13 in a k-th slot, and the second symbol may be transmitted as an OFDM symbol (index) 0 in a (k + 1) th slot. As described above, an operation of transmitting an SR over two slots by the terminal may be undesirable because the base station should guarantee UL transmission for at least two slots, thereby limiting scheduling flexibility of the base station.

Therefore, in the present invention, when obtaining a PUCCH start symbol (for N transmission) (N ₀ ) in a PUCCH transmission period, a Modulo operation is applied to a value obtained by subtracting a PUCCH transmission length from a PUCCH transmission period (eg, N ₀ = 6 mod (7-2) = 5), we propose a scheme for SR transmission to be limited to a single slot.

The nineteenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.20. 제20 SR 전송 방법3.20. 20th SR Transmission Method

When the HARQ-ACK transmission PUCCH resources (hereinafter referred to as A / N PUCCH) and the SR transmission PUCCH resources (hereinafter referred to as SR PUCCH) to be transmitted by the UE are overlapped in whole or in part on the time axis, the UE is based on the priority between HARQ-ACK and the SR. UCI transmission can be performed together.

(1) SR has higher priority than HARQ-ACK

(1-1) If a positive SR occurs before (or a corresponding point in time) T _MUX -T ₁ , the UE transmits U / I multiplexed A / N and SR as a single PUCCH resource.

(1-2) Positive SR occurs after T _MUX -T ₁

-UE skips (or stops) A / N transmission and transmits SR to SR PUCCH

Or, if A / N is less than or equal to X bits (for example, X = 2), the UE UCI multiplexes the corresponding A / N and the SR as a single PUCCH resource

Or, in case of A / N exceeding X bits (eg, X = 2), the UE transmits only A / N for a specific single (eg, PCell (Primary Cell)) PDSCH and UCI multiplexes the SR as a single PUCCH resource.

(2) HARQ-ACK has higher priority than SR

(2-1) If a positive SR occurs before (or a corresponding point in time) T _MUX -T ₁ , the UE transmits U / N multiplexing of A / N and SR as a single PUCCH resource.

(2-2) If a positive SR occurs after T _MUX -T ₁ , the UE skips (or stops) SR transmission and transmits only A / N to A / N PUCCH.

In the present invention, T _MUX means a transmission time of a PUCCH resource for transmitting the UCI multiplexing result for A / N and SR, T ₁ may be one of the following. Alternatively, the T _MUX -T ₁ may mean a time point at which UE starts encoding for HARQ-ACK.

1) Opt. 1: (minimum) PDSCH-to-HARQ-ACK timing set to the UE (such as higher layer signal)

2) Opt. 2: PDSCH-to-HARQ-ACK timing set / instructed for the last PDSCH (target HARQ-ACK transmission) received by the UE

3) Opt. 3: (minimum) PDSCH-to-HARQ-ACK timing (or UE processing time) according to UE capability (or implementation)

In the above configuration, the UE may perform UCI multiplexing (between HARQ-ACK and SR) according to the PUCCH Format.

<1> When A / N PUCCH is PF 2/3/4 and SR PUCCH is PF 0/1, UE transmits A / N and SR to A / N PUCCH after Appending SR bit (s) to UCI

<2> If the A / N PUCCH is PF 0/1 and the SR PUCCH is PF 0/1 (both are PF 1), the UE may increase the CS by X (eg, X = 1). A / N transmission with N PUCCH (Positive SR is expressed as CS increase)

<3> When the A / N PUCCH is PF 1 and the SR PUCCH is PF 1, the UE transmits an A / N modulation symbol to the SR PUCCH (Positive SR is represented by SR PUCCH selection / transmission). In this case, the operation may be applied only when the start symbol of the SR PUCCH is equal to or later than the start symbol of the A / N PUCCH.

In addition, in the above configuration, the terminal may determine the priority between the SR and the HARQ-ACK as follows.

1> base station establishes a priority relationship with higher layer signals

2> Determined based on the absolute value of the SR cycle. For example, if the SR period is less than or equal to a predetermined value, the SR may have a higher priority than the HARQ-ACK, and in other cases, the HARQ-ACK may have a higher priority than the SR.

3> Determined by the magnitude relationship between the PDSCH-to-HARQ-ACK timing configured to the UE and the SR period. For example, when the PDSCH-to-HARQ-ACK timing is greater than the SR period, the SR may have a higher priority than the HARQ-ACK, and in other cases, the HARQ-ACK may have a higher priority than the SR. In this case, the PDSCH-to-HARQ-ACK timing may be one of the following.

-Opt. 1: (minimum) PDSCH-to-HARQ-ACK timing configured to UE

-Opt. 2: PDSCH-to-HARQ-ACK timing for the PDSCH (target HARQ-ACK transmission) last received by the terminal

-Opt. 3: (minimum) PDSCH-to-HARQ-ACK timing according to terminal capability (or implementation)

In the present invention, SR PUCCH and A / N PUCCH may refer to PUCCH resources configured and / or indicated for SR (only) and HARQ-ACK (only) transmission, respectively.

In addition, in the present invention, PF 0, PF 1, PF 2, PF 3, PF 4 means PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, PUCCH format 4, respectively, PF X / Y May mean PF X or PF Y.

In addition, in the present invention, PDSCH-to-HARQ-ACK timing may mean a time from the PDSCH end time to the HARQ-ACK transmission time.

In addition, in the present invention, the fact that a positive SR has occurred may mean that the UE has generated UL data to be transmitted or has determined to request UL scheduling.

More specifically, in UCI multiplexing between HARQ-ACK and SR, a positive SR may occur after the UE starts encoding for HARQ-ACK or starts transmitting PUCCH for HARQ-ACK. In this case, it may be necessary to consider how the terminal will process the SR.

If the HARQ-ACK has priority over the SR, the UE multiplexes the SR and the HARQ-ACK when the positive SR occurs before the HARQ-ACK encoding, and transmits the information to a single PUCCH resource. Delay in one cycle and can perform only HARQ-ACK transmission.

However, in the NR system according to an embodiment of the present invention, there may exist SR transmission requiring low latency in order to support services such as URLLC, and the SR transmission may have a higher priority than HARQ-ACK. have.

If the SR has a priority over the HARQ-ACK as described above, if the positive SR occurs before the HARQ-ACK encoding, the terminal multiplexes the SR and HARQ-ACK to transmit a single PUCCH resource, otherwise, HARQ- ACK transmission may be omitted or stopped and only SR transmission may be performed.

In this case, the HARQ-ACK encoding start time of the UE may be entirely dependent on the UE implementation, or may be promised to a time before (minimum) PDSCH-to-HARQ-ACK timing compared to the PUCCH resource transmission start time to transmit the UCI multiplexing result. In this case, it may be desirable for the base station to adjust the priority between the HARQ-ACK and the SR. For example, the following options may be considered as a method for adjusting the priority between the HARQ-ACK and the SR.

[1] Opt. 1: relative priority is set to a higher layer signal (eg RRC signaling)

[2] Opt. 2: relative priority is set according to the absolute value of the SR period

[3] Opt. 3: Relative priority determined by relationship between PDSCH-to-HARQ-ACK timing and SR period

For example, Opt. In case 2, the UE may consider that the SR has a higher priority than the HARQ-ACK if the SR period is less than or equal to a specific value. On the contrary, if the SR period is greater than the specific value, the UE may determine that the HARQ-ACK has a higher priority than the SR. .

In another example, Opt. In case 3, the UE may consider that the SR has a higher priority than the HARQ-ACK if the SR period is smaller than the minimum PDSCH-to-HARQ-ACK timing set to it, otherwise the HARQ-ACK has a higher priority than the SR. We can judge that it is high.

12 is the Opt. When determining the priority between the HARQ-ACK and the SR as shown in FIG. 3, the SR period is shorter than (min) PDSCH-to-HARQ-ACK timing, indicating a case in which the SR has a higher priority.

Therefore, when a positive SR occurs, the UE may omit HARQ-ACK transmission and transmit only the SR. However, when a positive SR occurs during the HARQ-ACK transmission, the UE may stop the HARQ-ACK transmission and perform the SR transmission.

13 and 14 show Opt. When determining the priority between the HARQ-ACK and the SR as shown in FIG. 3, the SR period is longer than the (min) PDSCH-to-HARQ-ACK timing, indicating a case in which the HARQ-ACK has a higher priority. In this case, if the positive SR occurs before the HARQ-ACK encoding starts, the UE transmits the HARQ-ACK and the SR to UCI multiplexes and transmits them as a single PUCCH resource. Otherwise, the UE may delay the SR transmission in the next cycle and transmit only the HARQ-ACK. have.

In the above configurations, the reason why the reference point of the SR period is set to (min) PDSCH-to-HARQ-ACK timing is because the corresponding value corresponds to the end time of the bundling window to be referred for HARQ-ACK multiplexing of the UE. . That is, the base station may expect to start encoding for HARQ-ACK after the UE detects at least the PDSCHs in the bundling window.

Additionally, a single PUCCH resource for UCI multiplexing and transmitting HARQ-ACK and SR may be defined as follows according to the PUCCH Format of the PUCCH resource for each HARQ-ACK and SR.

1] When A / N PUCCH is PF 2/3/4 and SR PUCCH is PF 0/1, UE transmits A / N and SR to A / N PUCCH after appending SR bit (s) to UCI.

2] If the A / N PUCCH is PF 0/1 and the SR PUCCH is PF 0/1 (both are PF 1), the UE has A / N where CS is increased by X (eg X = 1). A / N transmission with PUCCH (Positive SR is expressed as CS increase)

3] When the A / N PUCCH is PF 1 and the SR PUCCH is PF 1, the UE transmits an A / N modulation symbol to the SR PUCCH (Positive SR is represented by SR PUCCH selection / transmission). In this case, when the Starting symbol of the SR PUCCH is earlier than the Starting symbol of the A / N PUCCH, the UE may omit the SR transmission and transmit only the A / N to the A / N PUCCH.

In this case, when both the AN PUCCH and the SR PUCCH are PF 1, when the HARQ-ACK information is transmitted to the SR PUCCH, the UE does not reduce the UE processing time for HARQ-ACK encoding and the SR PUCCH corresponds to the AN PUCCH. The above operation can be performed only when the same or the same starting symbol is used. Otherwise, the terminal may omit the SR or HARQ-ACK transmission according to the priority.

In addition, when HARQ-ACK (hereinafter, A / N) transmission PUCCH resources (hereinafter, A / N PUCCH) and SR transmission PUCCH resources (hereinafter, SR PUCCH) to be transmitted by the UE are overlapped in whole or in part on the time axis, A / N PUCCH is PF 2/3/4, SR PUCCH may be PF 0/1. In this case, the UE may express the SR information as an explicit bit (s) and then transmit coded modulated symbols obtained by encoding and modulating the SR bit (s) through punctured REs in the A / N PUCCH. . (I.e. piggyback the SR to some specific REs in the A / N PUCCH)

Here, the modulation order for the SR bit (s) may be the same as A / N.

Also, the number of coded modulated symbols (per layer) for the SR may be changed according to the UCI payload size for the SR and Beta-offset, which is a design variable for the SR.

In addition, the SR transmission REs mapped to RE based on puncturing for the A / N PUCCH have a subset (eg, subset) of (UCI) REs in the A / N PUCCH on OFDM symbols in which A / N and SR overlap. May be limited.

More specifically, the number of coded modulation symbols (per layer) for the SR may include a coding rate for A / N (or UCI payload size for A / N, Cyclic Redundancy Check (CRC) bits size for A / N, And number of transmission REs in A / N PUCCH for A / N) or maximum coding rate for A / N PUCCH, design variable beta-offset (for SR), modulation order (for SR) and (for SR) It can be calculated based on the UCI payload size.

For example, the coding rate for A / N (or the maximum coding rate for A / N PUCCH) is

, The design variable beta-offset set for the SR

, Modulation order for SR

, UCI payload size for SR

, CRC bits size for SR

, The number of Coded modulated symbols (per layers) for the SR

Can be calculated as follows.

Here, UB _SR means the upper limit of the number of coded modulation symbols (per layer) for the SR. For example, the UB _SR may be the number of (UCI) REs in the A / N PUCCH on OFDM symbols in which A / N and SR overlap.

In addition, when the HARQ-ACK transmission PUCCH resources (hereinafter, A / N PUCCH) and the SR transmission PUCCH resources (hereinafter, SR PUCCH) to be transmitted by the UE are overlapped in whole or in part on the time axis, the UE is HARQ-ACK (hereinafter, A / N). UCI transmission may be performed as follows based on the priority between the SR and the SR.

(A) A / N PUCCH is PF 2/3/4 and SR PUCCH is FP 0/1

(A-1) When A / N has higher priority than SR (or when Starting symbols of A / N PUCCH and SR PUCCH are the same)

-UE transmits UCI payload configured by adding SR bit (s) to A / N via A / N PUCCH

If the UE determines that there is no UL data arrival before the start of UCI encoding to be transmitted through A / N PUCCH, it is regarded as a negative SR.

(A-2) SR has higher priority than A / N

-Opt. 1: UE omits A / N transmission and transmits only SR PUCCH

-Opt. 2: UE punctures A / N PUCCH REs on superimposed (OFDM) symbols and transmits (part or all) SR PUCCH in corresponding (OFDM) symbols

-Opt. 3: transmit A / N to A / N PUCCH, expressing (part or all) SR as explicit bit (s) to transmit coded modulation symbols for SR through some RE punctured in A / N PUCCH

(B) A / N PUCCH is PF 0/1 and SR PUCCH is PF 0/1 (except when A / N PUCCH is PF 1 and SR PUCCH is PF 1)

(B-1) When A / N has higher priority than SR (or when Starting symbols of A / N PUCCH and SR PUCCH are the same)

If it is a positive SR, the UE transmits A / N as a resource that increases the CS of the A / N PUCCH, and if a negative SR, the UE transmits A / N as an A / N PUCCH resource. Here, the CS increase may be applied to A / N PUCCH resources on full (OFDM) symbols or on overlapping SR (OFDM) symbols.

If the UE determines that there is no UL data arrival until the start of the modulation (or subcarrier mapping) for the A / N PUCCH, the UE regards this as a Negative SR (or Negative SR determination is the UE implementation).

(B-2) SR has higher priority than A / N

-Opt. 1: UE omits A / N transmission and transmits only SR PUCCH

-Opt. 3: UE transmits A / N to A / N PUCCH, but transmits (part or all) SR by changing CS (or sequence) on overlapped (OFDM) symbols

(C) A / N PUCCH is F1 and SR PUCCH is F1

(C-1) When A / N has higher priority than SR (or when Starting symbols of A / N PUCCH and SR PUCCH are the same)

-If it is a positive SR, the UE transmits A / N to SR PUCCH resources. If a negative SR, the UE transmits A / N to A / N PUCCH resources.

(C-2) SR has higher priority than A / N

-Opt. 1: UE omits A / N transmission and transmits only SR PUCCH

In the above configurations, the priority between the A / N and the SR may be determined by a combination of one or more of the following priority rules or may be set by the base station through a higher layer signal and / or a DCI.

A) Opt. 1: PUCCH with shorter PUCCH duration has higher priority

B) Opt. 2: PUCCH with smaller period or UL timing (eg PDSCH-to-HARQ-ACK timing) has priority

C) Opt. 3: PUCCH with a faster starting symbol has a higher priority.

Additionally, in the following description, the relative priority between A / N and SR is determined by PUCCH length, SR period, and (minimum) UL timing for A / N (e.g. PDSCH-to-HARQ-ACK timing). Assume Specifically, when UCI 1 is Long PUCCH, it is assumed that UCI 2 has priority over UCI 1 only when UCI 2 is Short PUCCH and the period (or (minimum) UL timing) is shorter. In other cases, it is assumed that UCI corresponding to A / N among UCI 1 and UCI 2 has higher priority.

<A> A / N PUCCH is PF 3/4 and SR PUCCH is PF 1

If the UE determines that there is no UL data arrival before the start of UCI encoding to be transmitted through A / N PUCCH, the UE regards this as a negative SR.

<B> A / N PUCCH is PF 3/4 and SR PUCCH is PF 0

<B-1> SR periodicity <(minimum) for PDSCH-to-HARQ-ACK timing

-Opt. 1: UE omits A / N transmission and transmits only SR PUCCH

-Opt. 3: UE transmits A / N to A / N PUCCH, expressing (part or all) SR as Explicit bit (s), Coded modulation symbols for SR to some RE punctured in A / N PUCCH send

<B-2> SR periodicity ≥ (minimum) PDSCH-to-HARQ-ACK timing

<C> A / N PUCCH is PF 1 and SR PUCCH is PF 1

<D> A / N PUCCH is PF 1 and SR PUCCH is PF 0

<D-1> SR periodicity <(minimum) for PDSCH-to-HARQ-ACK timing

-Opt. 1: UE omits A / N transmission and transmits only SR PUCCH

<D-2> SR periodicity ≥ (minimum) PDSCH-to-HARQ-ACK timing

If it is a positive SR, the UE transmits A / N as a resource that increases the CS of the A / N PUCCH, and if a negative SR, the UE transmits A / N as an A / N PUCCH resource. In this case, the CS increase may be applied to the A / N PUCCH resource on the entire (OFDM) symbols or the overlapping (OFDM) symbols with the SR.

<E> A / N PUCCH is PF 2 and SR PUCCH is PF 0/1

<F> A / N PUCCH is PF 0 and SR PUCCH is PF 0/1

In the above configuration, the (minimum) PDSCH-to-HARQ-ACK timing may mean a minimum value of PDSCH-to-HARQ-ACK timing set or promised in the corresponding A / N PUCCH.

The 20th SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

3.21. 제21 SR 전송 방법3.21. 21st SR Transmission Method

When the HARQ-ACK transmission PUCCH resources (hereinafter referred to as A / N PUCCH) and the CSI transmission PUCCH resources (hereinafter referred to as CSI PUCCH) to be transmitted by the UE are overlapped in whole or in part on the time axis, the UE is UCI multiplexing HARQ-ACK and CSI. Transmission on the PUCCH and the CSI reference resource can be determined as follows.

(1) when the single PUCCH is A / N PUCCH

The (time axis) CSI reference resource for the CSI exists at a point before T _{A / N} -T ₁ (or at that point in time), while the fastest DL exists at a point before (or at that point in time) T _CSI -T _CQI. It may be a slot.

(2) When the single PUCCH is CSI PUCCH

The (time axis) CSI reference resource for the _CSI exists at a time point before (or at) the point before T _CSI -T ₁ , and is the fastest DL slot at a time point (or at the point) before the T _CSI -T _CQI. Can be.

Here, T _{A / N} means A / N PUCCH transmission time point, T ₁ may be one of the following.

-Opt. 1: (minimum) PDSCH-to-HARQ-ACK timing configured to UE

Here, T _CSI means a CSI PUCCH transmission time, and T _CQI may be a value promised in advance between the base station and the terminal or a value set by the base station to the terminal.

In addition, the CSI reference resource refers to a time resource that is a reference of the CSI calculation, and (valid) DL slot is not included in the slot and / or measurement gap (eg, measurement gap) set as a DL slot (to the terminal). The slot may indicate a slot included in the same DL BWP as the DL bandwidth part (DL BWP) where the slot and / or the CSI reporting is performed.

In addition, the PDSCH-to-HARQ-ACK timing may mean a time from the PDSCH end time to the HARQ-ACK transmission time.

In more detail, when the PDSCH corresponding to the HARQ-ACK is a PDSCH based on DL assignment, the HARQ-ACK / SR and the CSI may be transmitted through the AN PUCCH. Therefore, when PUCCH resources to be transmitted for HARQ-ACK / SR and CSI overlap in the time axis, the UE always transmits a single PUCCH resource by UCI multiplexing HARQ-ACK / SR and CSI, but for a UE for HARQ-ACK Only the CSI reference resource for the CSI calculation may be changed to ensure the processing time.

As an example, it is assumed that the CSI reference resource when assuming CSI only transmission is later than the start time of HARQ-ACK encoding. In this case, when the UE intends to jointly encode the HARQ-ACK and the CSI after the CSI calculation, the UE performs encoding later than the time when the UE performs only HARQ-ACK encoding, so that the UE processing time until the PUCCH transmission time is not guaranteed. You may not.

Therefore, in the present invention, when PUCCH and CSI PUCCH (for HARQ-ACK / SR transmission) overlap on the time axis, the UE always transmits HARQ-ACK / SR and CSI by UCI multiplexing as a single PUCCH, but CSI reference resource The present invention proposes a method of changing the multiplexed UCI so that it exists before the PDSCH-to-HARQ-ACK timing compared to the PUCCH resource to be transmitted.

More specifically, in the NR system according to an embodiment of the present invention, the CSI reference resource may be defined as shown in the following table.

Here, n _{CQI_ref} may be set to be greater than (min) PDSCH-to-HARQ-ACK timing. Through this, it is possible to prevent the CSI calculation from affecting the UE processing time for HARQ-ACK. In this case, however, n may mean a slot for transmitting CSI.

The 21st SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.

First, the terminal receives first configuration information on one or more first uplink resources for SR transmission from the base station (S1510). In this case, the first configuration information may be received through higher layer signaling.

Subsequently, the terminal receives second configuration information on the second uplink resource for transmitting the UCI from the base station (S1520). In this case, the second configuration information may be received through downlink control information (DCI).

When N first uplink resources and the second uplink resource for N transmissions (N is a natural number greater than 1) overlap in the time domain, the UE is configured to N SR configuration (or SR process). Bit information indicating the SR information is transmitted in the second uplink resource together with the UCI (S1530).

For example, each of the plurality of bits may be set to have a value of 1 when the corresponding SR information is a positive SR and a value of 0 when the corresponding SR information is a negative SR.

In addition, the plurality of bits may be configured in an order based on identification information of the N SR settings. For example, the plurality of bits may be configured in an SR process (or SR configuration) index number order of corresponding SR information.

In the present invention, the first uplink resource and the second uplink resource may overlap all or part of the time domain.

Also, in the present invention, the second uplink resource may correspond to a physical uplink control channel (PUCCH) resource for transmitting the acknowledgment information.

In the above configuration, the UCI may include one or more of CSI or HARQ-ACK information.

In this case, the terminal may transmit bit information indicating the SR information for the N SR configuration together with the acknowledgment information in the second uplink resource through various methods. For example, the terminal generates a UCI payload combining the UCI and bit information indicating SR information for N SR configuration, and generates a coded bit format for the UCI payload to generate the second uplink resource. Can be sent from. In this manner, the terminal may transmit bit information indicating SR information for N SR configurations together with the UCI in the second uplink resource.

In response, the base station transmits first configuration information for one or more first uplink resources for SR transmission to the terminal and transmits second configuration information for a second uplink resource for transmitting acknowledgment information. do.

In this case, when N first uplink resources for the N SR transmissions and the second uplink resource overlap in the time domain, the base station transmits bit information indicating SR information for N SR configuration with the UCI. Together with the second uplink resource.

In addition, the terminal according to the present invention can transmit the SR as follows.

First, a first physical uplink control channel (PUCCH) format for transmitting SR information and a second PUCCH format for transmitting HARQ-ACK (Hybrid Automatic Repeat Request Acknowledge) information are determined. In this case, the first / second PUCCH format for transmitting the SR information and the HARQ-ACK information may be determined according to the configuration information of the base station and / or the UCI payload to be transmitted.

The first PUCCH format is composed of one or two symbols and corresponds to a PUCCH format supporting uplink control information (UCI) of up to 2 bits in size, and the second PUCCH format includes four or more symbols. It is configured and corresponds to a PUCCH format that supports UCI having a maximum size of 2 bits, and when the SR information is a positive SR, the terminal may transmit only the HARQ-ACK information using the second PUCCH format. .

In this way, the terminal may perform simultaneous transmission of the SR information and the HARQ-ACK information.

More specifically, the terminal of the terminal such that the simultaneous transmission of the SR information and the HARQ-ACK information is the first uplink resource for transmitting the SR information and the second uplink resource for transmitting the HARQ-ACK information It can only be performed when overlapping in the time domain.

Therefore, as described above, when the first uplink resource for transmitting the SR information and the second uplink resource for transmitting the HARQ-ACK information overlap in the time domain, the base station is determined by the appointment with the terminal. If only the HARQ-ACK information is received in a PUCCH format for transmitting HARQ-ACK information from the terminal, the terminal may intentionally recognize that the SR information is a positive SR.

It is obvious that examples of the proposed scheme described above may also be regarded as a kind of proposed schemes as they may be included as one of the implementation methods of the present invention. In addition, although the above-described proposed schemes may be independently implemented, some proposed schemes may be implemented in a combination (or merge) form. Information on whether the proposed methods are applied (or information on the rules of the proposed methods) may be defined so that the base station informs the terminal through a predefined signal (eg, a physical layer signal or a higher layer signal). have.

4. 장치 구성4. Device Configuration

16 is a diagram illustrating a configuration of a terminal and a base station in which the proposed embodiment can be implemented. The terminal and the base station illustrated in FIG. 16 operate to implement embodiments of the method for transmitting and receiving a scheduling request (SR) between the terminal and the base station.

A UE (UE) 1 may operate as a transmitting end in uplink and a receiving end in downlink. In addition, the base station eNB or gNB 100 may operate as a receiver in uplink and as a transmitter in downlink.

That is, the terminal and the base station may include

transmitters

10 and 110 and

receivers

20 and 120, respectively, to control transmission and reception of information, data and / or messages. Alternatively, the antenna may include

antennas

30 and 130 for transmitting and receiving messages.

In addition, the terminal and the base station may each include a processor (Processor 40, 140) for performing the above-described embodiments of the present invention and a memory (50, 150) that can temporarily or continuously store the processing of the processor, respectively. Can be.

The terminal 1 configured as described above includes a first configuration information for one or more first uplink resources for SR transmission and a second uplink resource for transmitting UCI from the base station 100 through the receiver 20. 2 Receive setting information. Subsequently, when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap with each other in the time domain, the UE 1 transmits through the transmitter 10. Bit information indicating SR information for the N SR configuration is transmitted in the second uplink resource together with the UCI.

In response, the base station 100 transmits the first configuration information for the one or more first uplink resources for the SR transmission and the second uplink resource for transmitting the UCI to the terminal 1 through the transmitter 110. The second setting information is transmitted. Subsequently, when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap with each other in the time domain, the base station 100 transmits through the receiver 120. Bit information indicating SR information for the N SR configuration is received in the second uplink resource together with the UCI.

The transmitter and the receiver included in the terminal and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission. Packet scheduling and / or channel multiplexing may be performed. In addition, the terminal and base station of FIG. 16 may further include a low power radio frequency (RF) / intermediate frequency (IF) unit.

Meanwhile, in the present invention, the terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, an MBS. A Mobile Broadband System phone, a hand-held PC, a notebook PC, a smart phone, or a Multi Mode-Multi Band (MM-MB) terminal may be used.

Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal. have. In addition, a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.

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

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

In the case of an implementation by firmware or software, the method according to the embodiments of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above. For example, software code may be stored in

memory units

50 and 150 and driven by

processors

40 and 140. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

The invention can be embodied in other specific forms without departing from the technical idea and essential features of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention. In addition, the claims may be incorporated into claims that do not have an explicit citation relationship in the claims, or may be incorporated into new claims by amendment after filing.

Embodiments of the present invention can be applied to various wireless access systems. Examples of various radio access systems include 3rd Generation Partnership Project (3GPP) or 3GPP2 systems. Embodiments of the present invention can be applied not only to the various wireless access systems, but also to all technical fields to which the various wireless access systems are applied. Furthermore, the proposed method can be applied to mmWave communication system using ultra high frequency band.

Claims

In the method for transmitting a scheduling request (SR) to the base station in a wireless communication system,

Receiving first configuration information on at least one first uplink resource for SR transmission and second configuration information on a second uplink resource for transmitting uplink control information (UCI) from the base station; And

Bit information indicating SR information on N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain Transmitting, along with the UCI, in the second uplink resource.
The method of claim 1,

And the first configuration information is received via higher layer signaling.
The method of claim 1,

The second configuration information is received via downlink control information (DCI).
The method of claim 1,

Bit information indicating the SR information for the N SR settings,

And information about one SR configuration among the N SR configurations and positive SR information corresponding to the one SR configuration.
The method of claim 1,

Bit information indicating the SR information for the N SR settings,

And a plurality of bits indicating whether SR information corresponding to each of the N SR configurations is a positive SR or a negative SR.
The method of claim 5,

Each of the plurality of bits,

If the corresponding SR information is a positive SR, it has a value of 1.

If the corresponding SR information is a negative SR, has a value of zero.
The method of claim 5,

The plurality of bits,

And configured in an order based on identification information of the N SR settings.
The method of claim 1,

The N first uplink resources and the second uplink resource,

Method of transmitting a scheduling request, in whole or in part, in the time domain.
The method of claim 1,

The second uplink resource is,

And corresponding to a physical uplink control channel (PUCCH) resource for transmitting the UCI.
The method of claim 1,

The bit information is,

And transmitting in the second uplink resource in a coded bits format generated in conjunction with the UCI.
The method of claim 1,

The UCI,

Channel state information (CSI) or

A method for transmitting a scheduling request including HARQ-ACK (Hybrid Automatic Repeat request Acknowledge) information.
In the method for receiving a scheduling request (SR) from the terminal in a wireless communication system,

Transmitting first configuration information of at least one first uplink resource for SR transmission and second configuration information of a second uplink resource transmitting uplink control information (UCI) to the terminal; And

Bit information indicating SR information on N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain Receiving in the second uplink resource together with the UCI.
A terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system,

Receiving unit;

A transmitter; And

A processor operating in connection with the receiver and the transmitter,

The processor,

Receiving first configuration information on at least one first uplink resource for SR transmission and second configuration information on a second uplink resource for transmitting uplink control information (UCI) from the base station; And

Bit information indicating SR information on N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain And transmit in the second uplink resource together with the UCI.
A base station for receiving a scheduling request (SR) from a terminal in a wireless communication system,

Receiving unit;

A transmitter; And

A processor operating in connection with the receiver and the transmitter,

The processor,

Transmitting first configuration information of at least one first uplink resource for SR transmission and second configuration information of a second uplink resource transmitting uplink control information (UCI) to the terminal; And

Bit information indicating SR information on N SR configuration when N first uplink resources and the second uplink resource for N (N is a natural number greater than 1) overlap in the time domain And receive at the second uplink resource together with the UCI.
In the method for transmitting a scheduling request (SR) to the base station in a wireless communication system,

Determining a first physical uplink control channel (PUCCH) format for transmitting SR information and a second PUCCH format for transmitting Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information; And

The first PUCCH format is composed of one or two symbols and corresponds to a PUCCH format supporting uplink control information (UCI) of up to 2 bits in size, and the second PUCCH format includes four or more symbols. Configured to correspond to a PUCCH format supporting up to 2 bits of UCI, and when the SR information is a positive SR, by transmitting only the HARQ-ACK information using the second PUCCH format, And performing simultaneous transmission of the HARQ-ACK information.
The method of claim 15,

When the first uplink resource for transmitting the SR information and the second uplink resource for transmitting the HARQ-ACK information overlap in the time domain, simultaneous transmission of the SR information and the HARQ-ACK information is performed. How to send a request.
A terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system,

Receiving unit;

A transmitter; And

A processor operating in connection with the receiver and the transmitter,

The processor,

Determining a first physical uplink control channel (PUCCH) format for transmitting SR information and a second PUCCH format for transmitting Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information; And

The first PUCCH format is composed of one or two symbols and corresponds to a PUCCH format supporting uplink control information (UCI) of up to 2 bits in size, and the second PUCCH format includes four or more symbols. Configured to correspond to a PUCCH format supporting up to 2 bits of UCI, and when the SR information is a positive SR, by transmitting only the HARQ-ACK information using the second PUCCH format, And perform simultaneous transmission of the HARQ-ACK information.