WO2018203686A1 - Procédé d'émission et de réception de demande de planification entre un terminal et une station de base dans un système de communication sans fil, et dispositif prenant en charge ce procédé - Google Patents

Procédé d'émission et de réception de demande de planification entre un terminal et une station de base dans un système de communication sans fil, et dispositif prenant en charge ce procédé Download PDF

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Publication number
WO2018203686A1
WO2018203686A1 PCT/KR2018/005149 KR2018005149W WO2018203686A1 WO 2018203686 A1 WO2018203686 A1 WO 2018203686A1 KR 2018005149 W KR2018005149 W KR 2018005149W WO 2018203686 A1 WO2018203686 A1 WO 2018203686A1
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Prior art keywords
pucch
ack
transmission
information
harq
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PCT/KR2018/005149
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English (en)
Korean (ko)
Inventor
박한준
김선욱
안준기
양석철
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엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to EP23156194.5A priority Critical patent/EP4203590A1/fr
Priority to CN201880017517.8A priority patent/CN110431905B/zh
Priority to JP2019535359A priority patent/JP6845330B2/ja
Priority to EP18794894.8A priority patent/EP3471489B1/fr
Priority to CN202310140700.XA priority patent/CN116318567A/zh
Priority claimed from KR1020180051192A external-priority patent/KR102004271B1/ko
Publication of WO2018203686A1 publication Critical patent/WO2018203686A1/fr
Priority to US16/248,653 priority patent/US10568124B2/en
Priority to US16/658,731 priority patent/US11032838B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • 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.
  • 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.).
  • 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.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • Massive Machine Type Communications which connects multiple devices and objects to provide various services anytime, anywhere, is also being considered in next-generation communications.
  • MTC Massive Machine Type Communications
  • a communication system design considering a service / UE that is sensitive to reliability and latency is being considered.
  • 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.
  • 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.
  • 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
  • UCI uplink control information
  • N is a natural number greater than 1
  • the first configuration information may be received through higher layer signaling.
  • the second configuration information may be received through downlink control information (DCI).
  • DCI downlink control information
  • 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. .
  • 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.
  • 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.
  • the plurality of bits may be configured in an order based on identification information of the N SR settings.
  • the N first uplink resources and the second uplink resource may overlap all or part of the time domain.
  • the second uplink resource may correspond to a physical uplink control channel (PUCCH) resource for transmitting the UCI.
  • PUCCH physical uplink control channel
  • bit information may be transmitted in the second uplink resource in a coded bits format generated in combination with the UCI.
  • the UCI may include channel state information (CSI) or Hybrid Automatic Repeat Request Acknowledge (HARQ-ACK) information.
  • CSI channel state information
  • HARQ-ACK Hybrid Automatic Repeat Request Acknowledge
  • 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.
  • SR scheduling request
  • N uplink control information
  • a terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system 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.
  • 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.
  • SR scheduling request
  • a method for transmitting a scheduling request (SR) by a terminal to a base station in a wireless communication system 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.
  • PUCCH physical uplink control channel
  • HARQ-ACK Hybrid Automatic Repeat request Acknowledge
  • a terminal for transmitting a scheduling request (SR) to a base station in a wireless communication system 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.
  • PUCCH physical uplink control channel
  • HARQ-ACK Hybrid Automatic Repeat request
  • 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.
  • a terminal 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.
  • the terminal may adaptively transmit the plurality of scheduling request information according to a situation.
  • 1 is a diagram illustrating a physical channel and a signal transmission method using the same.
  • FIG. 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.
  • FIG. 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.
  • FIG. 7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element.
  • FIG. 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.
  • FIG. 11 is a diagram illustrating a third SR transmission method according to an embodiment of the present invention.
  • FIG. 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.
  • FIG. 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • UE user equipment
  • MS mobile station
  • SS subscriber station
  • MSS mobile subscriber station
  • AMS advanced mobile station
  • the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service
  • 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
  • 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
  • Transmission Opportunity Period may be used in the same meaning as the term transmission period, transmission burst (Tx burst) or RRP (Reserved Resource Period).
  • 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.
  • CCA clear channel assessment
  • CAP channel access procedure
  • 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.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • 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).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • 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.
  • LTE-A (Advanced) system is an improved system of the 3GPP LTE system.
  • 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.
  • 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.
  • FIG. 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.
  • the initial cell search operation such as synchronizing with the base station is performed in step S11.
  • 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.
  • P-SCH Primary Synchronization Channel
  • S-SCH Secondary Synchronization Channel
  • the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information in a cell.
  • PBCH physical broadcast channel
  • the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to confirm the downlink channel state.
  • DL RS downlink reference signal
  • the UE 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.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the terminal may perform a random access procedure as in steps S13 to S16 to complete the access to the base station.
  • 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).
  • PRACH physical random access channel
  • 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).
  • the UE 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).
  • UCI uplink control information
  • HARQ-ACK / NACK Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK
  • SR Scheduling Request
  • CQI Channel Quality Indication
  • PMI Precoding Matrix Indication
  • RI Rank Indication
  • 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.
  • the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.
  • FIG. 2 shows a structure of a radio frame used in embodiments of the present invention.
  • the type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) systems and half duplex FDD systems.
  • FDD Frequency Division Duplex
  • 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).
  • 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.
  • 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.
  • 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.
  • 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).
  • DwPTS downlink pilot time slot
  • GP guard period
  • UpPTS uplink pilot time slot
  • 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).
  • 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.
  • 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.
  • 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.
  • FIG. 3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.
  • one downlink slot includes a plurality of OFDM symbols in the time domain.
  • 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.
  • FIG. 4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
  • 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.
  • a PUSCH carrying user data is allocated.
  • 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.
  • FIG. 5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.
  • 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.
  • 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).
  • PCFICH Physical Control Format Indicator Channel
  • PDCCH Physical Hybrid-ARQ Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • 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.
  • MTC Massive Machine Type Communications
  • 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).
  • the technology is referred to as New RAT or NR (New Radio) for convenience.
  • ⁇ and cyclic prefix information for each carrier bandwidth part may be signaled for each downlink (DL) or uplink (UL).
  • DL downlink
  • UL uplink
  • ⁇ and cyclic prefix information for a downlink carrier bandwidth part may be signaled through higher layer signaling DL-BWP-mu and DL-MWP-cp.
  • ⁇ and cyclic prefix information for an uplink carrier bandwidth part may be signaled through higher layer signaling UL-BWP-mu and UL-MWP-cp.
  • 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.
  • each half-frame may be configured of subframes 0-4 and subframes 5-9, respectively.
  • 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.
  • a self-contained slot structure may be applied as the slot structure as described above.
  • FIG. 6 is a diagram illustrating a self-contained slot structure applicable to the present invention.
  • 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.
  • 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.
  • 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.
  • 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).
  • the independent slot structure includes both the DL control region and the UL control region.
  • the control regions may be selectively included in the independent slot structure.
  • 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.
  • a slot may have various slot formats.
  • the OFDM symbol of each slot may be classified into downlink (denoted 'D'), flexible (denoted 'X'), and uplink (denoted 'U').
  • 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.
  • millimeter wave 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.
  • BF beamforming
  • each antenna element may include a TXRU (Transceiver Unit) to enable transmission power and phase adjustment for each antenna element.
  • TXRU Transceiver Unit
  • each antenna element may perform independent beamforming for each frequency resource.
  • 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.
  • the direction of the beam that can be transmitted at the same time may be limited to B or less.
  • 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.
  • FIG. 8 shows how TXRU is connected to all antenna elements.
  • the antenna element is connected to all TXRUs.
  • the antenna element requires a separate adder as shown in FIG. 8 to be connected to all TXRUs.
  • W represents the phase vector multiplied by an analog phase shifter.
  • W is a main parameter that determines the direction of analog beamforming.
  • the mapping between the CSI-RS antenna port and the TXRUs may be 1: 1 or 1: 1-to-many.
  • the beamforming focusing is difficult, but there is an advantage that the entire antenna configuration can be configured at a low cost.
  • analog beamforming refers to an operation of performing precoding (or combining) in the RF stage.
  • 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.
  • the hybrid beamforming structure may be represented by N transceiver units (TXRUs) and M physical antennas.
  • TXRUs transceiver units
  • 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.
  • 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.
  • FIG. 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.
  • the number of digital beams is L and the number of analog beams is N in FIG. 9.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • xPBCH physical broadcast channel
  • analog beams belonging to different antenna panels in one symbol may be transmitted simultaneously.
  • a configuration for measuring channels for analog beams is applied to transmit a reference signal (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.
  • 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.
  • a base station 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.
  • PUSCH physical uplink shared channel
  • the base station may schedule UL data transmission through a specific PUSCH to the UE through downlink control information (DCI) called UL grant.
  • DCI downlink control information
  • 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.
  • 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).
  • SR scheduling request message
  • the UE may transmit the SR on PUCCH, which is a physical channel for uplink control information (UCI) transmission purpose.
  • 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.
  • 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).
  • eMBB enhanced Mobile BroadBand
  • MMTC massive machine type communication
  • URLLC Ultra-Reliable and Low Latency Communication
  • 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.
  • PAPR peak power to average power ratio
  • 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.
  • the RS transmission RE and the UCI transmission RE may be classified according to a frequency division multiplexing (FDM) scheme for each symbol.
  • the terminal may generate coded bits for UCI and then transmit modulation symbols for the coded bits through REs for transmitting the UCI.
  • FDM-PUCCH the short PUCCH structure to which the FDM scheme between RSs and UCIs (per symbol) is applied as FDM-PUCCH as described above.
  • the SR transmission method of the UE using the Short PUCCH and Long PUCCH as described above will be described in detail.
  • 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.
  • the methods proposed in the present invention can be equally applied to a general wireless communication system.
  • a DM-RS demodulation reference signal
  • a SRS sounding reference signal
  • ACK / NACK is a confirmation of the data decoding result Response information
  • CSI channel state information
  • 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.
  • a physical resource block may mean a frequency axis resource allocation unit.
  • 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.
  • 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.
  • 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.
  • the terminal may perform the operation only for a time resource (or slot) set through a (terminal specific) higher layer signal.
  • 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.
  • the NR system may support DL or UL data transmission in a slot unit defined in the time axis.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • sequences constituting the SEQ-PUCCH may be distinguished from a time resource / frequency resource / CS (Cyclic Shift) resource / root index.
  • the SRS (s) can be distinguished in terms of time resource / frequency resource / CS resource / root index.
  • 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.
  • the M states may not include a negative SR (that is, a state in which the UE does not request UL scheduling).
  • the UE may express that it does not request the UL scheduling by not transmitting the SR to the base station.
  • 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).
  • 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.
  • the terminal may utilize the SEQ-PUCCH to which one sequence is allocated as a UL signal for transmitting the positive SR.
  • the UE may utilize SEQ-PUCCH to which M sequences are allocated for SR transmission having M states.
  • the base station 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.
  • the base station may instruct the terminal to transmit a SRS (sound reference signal), which is a UL channel measurement RS.
  • SRS sound reference signal
  • 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.
  • the base station may allocate M SRS resources corresponding to the M states.
  • the terminal may transmit the SR information to the base station by transmitting the SRS resources corresponding to the specific state.
  • the terminal 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.
  • 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.
  • 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.
  • SR eg, Data-SR
  • SR eg, Beam-SR
  • 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.
  • 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.
  • an SR for eMBB data e.g., eMBB-SR
  • an SR for URLLC data e.g., URLLC-SR
  • the joint result may be sent in a single SR transmission resource.
  • 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.
  • the UE may transmit SR and / or UCI as follows.
  • 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
  • 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.
  • the SR transmission resource may be a sequence
  • the UCI transmission resource may be applied to the FDM PUCCH transmitted by being contiguous with the SR transmission resource on a time axis.
  • Option 1 SR and UCI are transmitted using each transmission resource (Method 2)
  • the CS (cyclic shift) / root index applied to the SR sequence and the UCI sequence may be set differently.
  • 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
  • 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.
  • the SR information may be expressed as a sequence multiplexed with the PUCCH DM-RS and the CDM scheme.
  • 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.
  • 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).
  • FIG. 11 is a diagram illustrating a third SR transmission method according to an embodiment of the present invention.
  • SR and UCI eg, ACK / NACK, CSI (Channel State Information)
  • CSI Channel State Information
  • 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.
  • the UE combines the SR and the UCI to combine a single transmission resource (eg, short PUCCH) Can be sent to.
  • a single transmission resource eg, short PUCCH
  • 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
  • SEQ-PUCCH satisfying the low PAPR (peak power to average power ratio) characteristic
  • FDM ACK / NACK in the second symbol
  • 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).
  • PA power amplifier
  • 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.
  • the UE may include the SR information in the UCI transmission resources (PUCCH) and transmit. .
  • 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.
  • the terminal may transmit the SR and the UCI to each transmission resource.
  • the UE may combine the SR and the UCI to transmit the UCI transmission resources.
  • 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.
  • 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.
  • 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.
  • 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)
  • 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.
  • N candidates (or DM-RS resources) for the PUCCH DM-RS may be configured.
  • 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).
  • the negative SR means a state in which the UE does not request UL data scheduling.
  • candidates (or DM-RS resources) for the plurality of DM-RSs may be distinguished in terms of cyclic shift (CS) / orthogonal cover code (OCC).
  • CS cyclic shift
  • OCC orthogonal cover code
  • the coded bits for the UCI are UCI transmissions of the FDM-PUCCH. May be sent to REs for.
  • 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.
  • 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.
  • the terminal 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.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • Opt 1 The power of the channel set to the small power is adjusted to the power of the channel with the large power
  • 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.
  • 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.
  • the UE 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.
  • the time gap may be set in symbol units.
  • the time gap may be set to one symbol.
  • 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.
  • SCS subcarrier spacing
  • the UE 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.
  • the time gap may be set in symbol units.
  • the time gap may be set to one symbol.
  • 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.
  • SCS subcarrier spacing
  • the UE may apply one of the following options.
  • the terminal 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.
  • the fifth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.
  • 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.
  • sequences in the sequence set for the SEQ-PUCCH may have one of different time resources, frequency resources, lengths, CS resources, and root indices.
  • 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.
  • 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.
  • 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.
  • the kth gray code for the N bit UCI may be transmitted in a sequence having the kth index in the SEQ-PUCCH.
  • the SEQ-PUCCH is transmitted as a multi-time resource
  • 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.
  • 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.
  • 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 ⁇ .
  • the SEQ-PUCCH mainly targets 1 bit or 2 bits
  • bundling for ACK / NACK it is possible to reduce the total number of states to be transmitted in the SEQ-PUCCH.
  • 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.
  • 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.
  • 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.
  • Method # 1 send a specific single sequence
  • -Up to 1 M C combination can be represented for SR state and HARQ-ACK state.
  • maximum M C L combinations for SR state and HARQ-ACK state can be represented
  • 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.
  • the UE may not transmit any sequence for a specific SR and HARQ-ACK combination. (Ie expressed in DTX)
  • 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 ⁇ ).
  • SR state eg Positive SR or Negative SR
  • 2-bit HARQ-ACK state eg ⁇ ACK, ACK ⁇ , ⁇ ACK, NACK ⁇ , ⁇ NACK, ACK ⁇ , ⁇ NACK, NACK ⁇ .
  • the UE allocates and transmits different sequence pairs for different SR and HARQ-ACK combinations.
  • the terminal may transmit the sequence as follows. have. In this case, in the following table, 'O' means transmission of the sequence.
  • the base station may be set to transmit the sequence (s) according to Case 1 or Case 2 to the terminal.
  • the UE may not transmit any signal.
  • the UE may transmit the same sequence (eg Seq. 2) as Positive SR + ⁇ NACK, NACK ⁇ .
  • the base station may determine a combination of the SR and the HARQ-ACK based on the detected sequence (s) as follows.
  • Seq. 1 and Seq. 3 is transmitted in 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.
  • Seq. 1 and Seq. 3 is transmitted in symbol A and Seq. 2, Seq.
  • Seq. 2 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.
  • 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.
  • the eight sequence transmission combinations may correspond one-to-one as shown in the table corresponding to Case 1 described above.
  • Seq. 1 is transmitted in symbol A and Seq. 2, Seq. 3, Seq.
  • Seq. 2 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.
  • 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, ACK ⁇ , Positive SR + ⁇ NACK, NACK ⁇ Can correspond one to one.
  • 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.
  • 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.
  • the terminal may perform sequence transmission for each SR and 2 bits HARQ-ACK combination as shown in the following table.
  • the UE allocates and transmits different sequence pairs for different SR and HARQ-ACK combinations.
  • Case 4 Only transmission for a single sequence (eg power limited case)
  • the base station may set to transmit the sequence (s) according to Case 3 or Case 4 to the terminal.
  • the terminal may not transmit any signal.
  • the base station may determine a combination of the SR and the HARQ-ACK based on the detected sequence (s) as follows.
  • 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.
  • the base station may determine the combination of the SR and the HARQ-ACK as follows based on the detected sequence (s).
  • the base station can determine the combination of the SR and the HARQ-ACK as follows based on the detected sequence (s).
  • the terminal transmits 1 bit HARQ-ACK and SR
  • the following sequence allocation may be considered.
  • the terminal may operate as follows. .
  • the terminal may operate as one of the following tables.
  • 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.
  • the terminal for example, positive SR, negative SR
  • 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.
  • 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).
  • SEQ-PUCCH PUCCH
  • 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.
  • 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.
  • 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.
  • 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.
  • the base station may regard the HARQ-ACK as DTX or All NACK.
  • a specific sequence (corresponding to HARQ-ACK state) is transmitted among 2 N sequences allocated for HARQ-ACK transmission purposes.
  • the terminal may operate as follows. .
  • a specific sequence (corresponding to HARQ-ACK state) is transmitted among 2 N sequences allocated for HARQ-ACK transmission purposes.
  • the seventh SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.
  • a scheduling request 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
  • 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).
  • the terminal may perform one or more of the following schemes. Applicable
  • the UE 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.
  • the PUCCH resource for transmitting the SR information may be in the form of on / off keying for a specific sequence.
  • 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.
  • switching the PUSCH DM-RS sequence may mean switching a scrambling or cyclic shift value for the DM-RS.
  • the (short) PUCCH resource may have a transmission interval corresponding to one or two OFDM symbols.
  • 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).
  • a UCI eg, HARQ-ACK or CSI.
  • 'PUSCH' may be replaced with 'DM-RS based (long) PUCCH' and 'PUSCH DM-RS' may be replaced with 'PUCCH DM-RS'.
  • the UE 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.
  • 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.
  • a sequence selection in one symbol eg, SEQ-PUCCH, a PUCCH resource representing UCI by selecting and transmitting one of a plurality of sequences
  • 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.
  • 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.
  • 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.
  • 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.
  • the UE may perform one or more of the following schemes. Can be applied.
  • specific symbol (s) in the (long) PUCCH resource may be symbols corresponding to (time axis) transmission resource of (shot) PUCCH resource for SR transmission.
  • the (short) PUCCH resource may have a transmission period corresponding to one or two OFDM symbols.
  • 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.
  • 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.
  • 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.
  • a modulated symbol for a UCI eg, a modulation symbol for a binary phase shift keying (BPSK) or a quadrature phase shift keying (QPSK)
  • BPSK binary phase shift keying
  • QPSK quadrature phase shift keying
  • 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.
  • 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).
  • 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).
  • 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.
  • 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.
  • 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.
  • CS offset 0 the sequence modulation based (long) PUCCH
  • the ninth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.
  • 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.
  • 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.
  • Seq. 1, Seq. 2, Seq. 3. Seq. Four may be all different or some may be the same sequence.
  • 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.
  • p-SR and n-SR mean positive SR and negative SR, respectively.
  • the terminal 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.
  • Seq. 1, Seq. 2, ... . Seq. 8 may be all different or some may be the same sequence.
  • 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.
  • p-SR and n-SR mean positive SR and negative SR, respectively.
  • 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.
  • the base station 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.
  • the base station may set whether to bundle the same through higher layer signals (such as RRC signaling) and / or downlink control information (DCI).
  • higher layer signals such as RRC signaling
  • DCI downlink control information
  • 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.
  • the terminal 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
  • 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.
  • the UE may bundle states having the same HARQ-ACK information and express them in one sequence as shown in the following table.
  • the base station may semi-statically or dynamically set one of the above two modes according to the PUCCH resource state.
  • 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.
  • 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.
  • 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.
  • the base station may be restricted in setting a PUCCH resource set for HARQ-ACK transmission. .
  • the base station may be more free in setting up a PUCCH resource set.
  • 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.
  • the UE may select and transmit one of a plurality of sequences to express the UCI status for the SR and the HARQ-ACK.
  • the base station may configure the SR short PUCCH and HARQ-ACK short PUCCH resources as follows.
  • Opt. 1 Method for allocating four sequences as SR PUCCH resources and allocating N sequences as HARQ-ACK PUCCH resources
  • Cyclic shift values corresponding to the four sequences are Cyclic shifts.
  • 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.
  • 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.
  • the sequence resource corresponding to the SR only may be a resource reserved in an SR transmission period.
  • the sequence may correspond to an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource.
  • 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.
  • a sequence corresponding to each UCI state It can be defined as follows.
  • the terminal may transmit a corresponding sequence to represent the corresponding UCI state.
  • Two sequences in an SR transmission (short) PUCCH resource may correspond to ⁇ Positive SR, ACK ⁇ and ⁇ Positive SR, NACK ⁇ , respectively.
  • 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.
  • 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.
  • the sequence corresponding to ⁇ Positive SR, N / N ⁇ may be a sequence corresponding to SR only.
  • 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 ⁇ .
  • 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.
  • 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.
  • 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.
  • the sequence may correspond to an initial cyclic shift index allocated to an SR transmission (short) PUCCH resource.
  • 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.
  • a sequence corresponding to each UCI state It can be defined as follows.
  • the terminal may transmit a corresponding sequence to represent the corresponding UCI state.
  • Two sequences in an SR transmission (short) PUCCH resource may correspond to ⁇ Positive SR, ACK ⁇ and ⁇ Positive SR, NACK ⁇ , respectively.
  • 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.
  • 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.
  • 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.
  • 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.
  • the sequence corresponding to ⁇ Positive SR, A / N or N / A or N / N ⁇ may be a sequence corresponding to SR only.
  • 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 ⁇ .
  • 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
  • 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.
  • 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.
  • 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.
  • the sequence corresponding to each UCI state It can be defined as follows.
  • the terminal may transmit a corresponding sequence to represent the corresponding UCI state.
  • 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.
  • 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.
  • Opt. 4 Method of allocating one sequence to SR transmission (short) PUCCH resources and allocating 2N sequences to HARQ-ACK transmission (short) PUCCH resources
  • 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.
  • 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.
  • 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.
  • the sequence corresponding to each UCI state It can be defined as follows.
  • the terminal may transmit a corresponding sequence to represent the corresponding UCI state.
  • 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.
  • the two sequences may be two sequences for HARQ-ACK only.
  • 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 ⁇ .
  • the four sequences may be two sequences for HARQ-ACK only.
  • a / A, A / N, N / A, and N / N represent ACK / ACK, ACK / NACK, NACK / ACK, and NACK / NACK, respectively.
  • 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.
  • 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.
  • HARQ-ACK transmission (short) PUCCH resources include more than four sequence resources
  • two or more PRB resources with sequence resources may be configured.
  • 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.
  • the cyclic shift value may refer to a form in which a specific cyclic shift value of the low PAPR sequence is applied.
  • the UE may select and transmit one (joint) UCI state of the SR and the HARQ-ACK from a plurality of sequences.
  • the SR PUCCH resource may include at least sequence resources for SR only transmission.
  • 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.
  • 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.
  • 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 UE can transmit a (joint) UCI state of the SR and HARQ-ACK.
  • 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.
  • 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.
  • ACK / NACK bundling (eg, logical AND operation) may be applied to HARQ-ACK (with positive SR).
  • UCI states may be expressed as follows.
  • the terminal may transmit a corresponding sequence to represent the corresponding UCI state.
  • Two sequences in an SR transmission (short) PUCCH resource may correspond to ⁇ Positive SR, ACK ⁇ and ⁇ Positive SR, NACK ⁇ , respectively.
  • 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)
  • sequence corresponding to ⁇ Positive SR, NACK ⁇ may be a sequence corresponding to SR only.
  • the sequence corresponding to ⁇ Positive SR, N / N ⁇ may be a sequence corresponding to SR only.
  • Two sequences in an SR transmission (short) PUCCH resource may correspond to ⁇ Positive SR, ACK ⁇ and ⁇ Positive SR, NACK ⁇ , respectively.
  • 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)
  • 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.
  • 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.
  • 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.
  • sequence corresponding to ⁇ Positive SR, A / N or N / A or N / N ⁇ may be a sequence corresponding to SR only.
  • 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 ⁇ .
  • 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.
  • SR only may be represented by an on / off keying scheme for (single) PUCCH resource or (single) sequence set as a higher layer.
  • 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
  • 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.
  • SR only may be represented by an on / off keying scheme for (single) PUCCH resource or (single) sequence set as a higher layer.
  • 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.
  • the (short) PUCCH resource may be configured in one of the following ways.
  • C-2 set for each PUCCH resource set (for HARQ-ACK transmission) set to UE
  • the transmission resource corresponding to All NACK may be set identically or independently to the SR only transmission resource.
  • 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).
  • 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 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.
  • HARQ-ACK transmission one set per PUCCH resource set
  • HARQ-ACK transmission one set per PUCCH resource
  • 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. 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. 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.
  • UCI states eg S 0 , S 1 ,..., S N-1
  • the base station may set an initial cyclic shift index (ie, ⁇ 0, 1, ..., L-1 ⁇ ) as the HARQ-ACK transmission (short) PUCCH resource.
  • the UE may perform cyclic shift to UCI state mapping from a gentle shift by one of the following methods.
  • L eg, 12
  • L means the total number of cyclic shifts in the PRB.
  • 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.
  • the UCI state may additionally correspond to a value to which a modulo operation for L is applied.
  • 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.
  • 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.
  • the SR related information may include one or more of the following information.
  • the terminal may transmit the SR related information as one of the following.
  • 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)).
  • 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
  • the terminal may perform one of the following operations.
  • a / N may mean HARQ-ACK.
  • 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.
  • SR information eg, positive SR or negative SR
  • the bundling method may be a spatial domain A / N bundling.
  • 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. .
  • the X bits which are the SR related information, may be related to a (short) PUCCH resource set selection process for 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.
  • the terminal may select the PUCCH resource set in one of the following manner.
  • Opt. 1 Select based on (total) UCI payload size for HARQ-ACK and SR related information
  • the UCI payload size for the UCI type is the (total) UCI payload size. Can be reflected in.
  • 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.
  • the UE may report the X bits information for the SR.
  • HARQ-ACK transmission (short) may be transmitted on a PUCCH resource.
  • 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.
  • 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.
  • 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.
  • Consists of only UCI signal without DM-RS may be a structure in which a UE transmits a specific UCI state by selecting / transmitting one of a plurality of specific sequences.
  • 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)
  • Supported UCI payload size K bits or more (more than)
  • 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).
  • IFFT Inverse Fast Fourier Transform
  • DFT Discrete Fourier Transform
  • 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.
  • 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
  • an SR refers to a physical layer signal for which a terminal requests UL scheduling from a base station.
  • a positive SR means a case where there is a UL scheduling request of the terminal
  • a negative SR means a case where there is no UL scheduling request of the terminal.
  • the terminal is SR as follows. And HARQ-ACK may be simultaneously transmitted.
  • the SR PUCCH may be set for each SR process.
  • UE sets a separate PUCCH format 0 resource (other than SR PUCCH and / or A / N PUCCH) and transmits to the corresponding resource.
  • the separate resource may be set for each SR process.
  • -Opt. 3 Set a separate PUCCH format 1 resource (other than SR PUCCH and / or A / N PUCCH) and send it to the resource.
  • the separate resource may be set for each SR process.
  • SR PUCCH may be set for each SR process.
  • a / N PUCCH PUCCH format 2 or 3 or 4
  • HARQ-ACK only or negative SR + HARQ-ACK is transmitted in A / N PUCCH.
  • the SR PUCCH may be set for each SR process.
  • one of the options may be selectively applied according to a service type corresponding to the SR.
  • 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.
  • SR PUCCH PUCCH format of the PUCCH resource
  • a / N PUCCH PUCCH format of the PUCCH resource
  • the UE may be efficient for the UE to transmit a positive SR + HARQ-ACK to the SR PUCCH (eg, resource selection).
  • 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.
  • 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.
  • the UE may support simultaneous SR and HARQ-ACK transmission as follows.
  • the SR PUCCH may be set for each SR process.
  • -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).
  • 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.
  • SR PUCCH having a high low latency request eg, URLLC SR
  • SR having a low low latency request eg, eMBB SR
  • -Opt. 2 A method of transmitting to SR PUCCH or A / N PUCCH according to a service type corresponding to SR.
  • 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.
  • a high low latency request eg, URLLC SR
  • SR having a low Low Latency request eg, eMBB SR
  • the above configurations may be extended even when the terminal simultaneously transmits the CSI and the SR.
  • HARQ-ACK may support simultaneous transmission.
  • the PUCCH resource may be a PUCCH format 0 resource derived by applying a CS (cyclic shift) offset (or PRB offset) to the A / N PUCCH resource.
  • 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.
  • the PUCCH resource 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.
  • 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.
  • the PUCCH resource 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).
  • 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. 4 Omit HARQ-ACK transmission and transmit SR information to SR PUCCH resource
  • 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.
  • 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 / N PUCCH PUCCH format 2 or 3 or 4
  • the SR information may include information on whether an SR exists and on which SR process (or configuration) an SR exists.
  • the PUCCH resource may be a PUCCH format 0 resource derived by applying a CS offset (or PRB offset) to the A / N PUCCH resource.
  • 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.
  • the PUCCH resource 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).
  • 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. 4 Omit HARQ-ACK transmission and transmit SR information to SR PUCCH resource
  • the PUCCH resource transmitting positive SR + HARQ-ACK information to an SR PUCCH resource (or a PUCCH resource implied by the SR PUCCH resource).
  • the PUCCH resource 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).
  • 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.
  • the SR information may include information on whether an SR exists and on which SR process (or configuration) an SR exists.
  • 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.
  • 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.
  • 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.
  • a modulation for example, QPSK
  • an SR process 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 may mean SR information for different services.
  • 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.
  • 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.
  • SR information may be excluded from the UCI payload for selecting the PUCCH resource set.
  • the UE may perform PUCCH resource set selection based on the total UCI payload size for HARQ-ACK and CSI.
  • 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.)).
  • a specific PUCCH resource in the selected PUCCH resource set can be selected.
  • the A / N PUCCH resource is PUCCH format 0 (or format 1)
  • 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.
  • the UE 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.
  • the UE 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.
  • SR-PUCCH can be set (for a specific SR process).
  • 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).
  • 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).
  • '+' means positive SR.
  • 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.
  • the terminal may simultaneously support SR and HARQ-ACK transmission in one or more of the following ways. Can be.
  • 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.
  • 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.
  • 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.
  • the operation may be applied only when the SR PUCCH resource has a specific PUCCH format (for example, PUCCH format 1).
  • 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).
  • terminal specific higher layer signal
  • 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.
  • 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.
  • 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.
  • 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.
  • an SR process 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 may mean SR information for different services.
  • 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.
  • the UE 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.
  • the terminal 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.
  • BSR buffer status report
  • 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.
  • the terminal 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.
  • 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.
  • 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.
  • the terminal may include information on whether a positive / negative SR and which SR process (or configuration) exist for the plurality of SR processes.
  • 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.
  • the UE UCI multiplexing may be performed to the base station (as a single PUCCH resource).
  • the PUCCH resource configured for UCI type (only) (hereinafter UCI A) transmission having the highest priority among the UCI types is named PUCCH A
  • 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.
  • S may include all UCI type (s)
  • PUCCH B may be a PUCCH resource in the case of assuming UCI multiplexing for all UCI type (s).
  • the UE 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).
  • the UE 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.
  • the UE transmits the UCI multiplexing information for the UCI type (s) in the set S to the PUCCH B.
  • the UE 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).
  • the UE 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.
  • the UE transmits the UCI multiplexing information for the UCI type (s) in the set S to the PUCCH B.
  • the terminal may perform the discovery process while sequentially excluding the UCI type based on the priority between UCI type (s).
  • the terminal may apply (2-1) of the above-described 18 th SR transmission method based on the new S and the PUCCH B.
  • SR PUCCH, A / N PUCCH, and CSI PUCCH mean resources configured for SR only, HARQ-ACK only, and CSI only transmission, respectively.
  • 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.
  • 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.
  • the UE assumes priority with A / N PUCCH> SR PUCCH (or HARQ-ACK> SR) and operates as follows. Can be.
  • the UE 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.
  • a / N PUCCH transmission time criterion (minimum)
  • the UE transmits UCI multiplexing information between the SR and the HARQ-ACK.
  • the method of the UE transmitting the information in which the SR and the HARQ-ACK are UCI multiplexed may follow the aforementioned 16 th SR transmission 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.
  • UCI A highest priority UCI type
  • the UE may operate as follows in each case.
  • at least one PUCCH in Case 1 and Case 2 may be a PUCCH for HARQ-ACK transmission.
  • -UCI piggybacked UCI (eg HARQ-ACK) configured to be transmitted on PUCCH by PUSCH
  • 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.
  • the UE UCI multiplexing may be performed as follows to transmit to a base station (as a single PUCCH resource).
  • 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.
  • PF0, PF1, PF2, PF3, and PF4 mean PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, and PUCCH format 4, respectively.
  • PF X / Y means PF X or PF Y.
  • 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.
  • Case 1 A / N PUCCH and SR PUCCH overlap
  • 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
  • the explicit SR bit (s) may include the following information on the basis of the A / N PUCCH transmission (start) time T.
  • the explicit SR bit (s) indicates positive SR information.
  • the explicit SR bit (s) indicates negative SR information.
  • the explicit SR bit (s) indicates negative SR information.
  • a / N PUCCH is PF0 and SR PUCCH is PF0
  • the UE transmits HARQ-ACK information to the PF0 resource (obtained from A / N PUCCH).
  • 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.
  • PRB physical resource block
  • CS cyclic shift index offset
  • OCC orthogonal cover code
  • the UE If a positive SR occurs after TT 0 , the UE skips the SR transmission and transmits HARQ-ACK (only) to the A / N PUCCH
  • the UE transmits HARQ-ACK (only) information to A / N PUCCH
  • a / N PUCCH is PF0 and SR PUCCH is PF1
  • Opt. 1 T based on A / N PUCCH transmission (start)
  • the UE transmits HARQ-ACK information to the PF0 resource (obtained from A / N PUCCH).
  • 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.
  • PRB physical resource block
  • CS cyclic shift index offset
  • OCC orthogonal cover code
  • the UE If a positive SR occurs after TT 0 , the UE skips the SR transmission and transmits HARQ-ACK (only) to the A / N PUCCH
  • the UE transmits HARQ-ACK (only) information to A / N PUCCH
  • the UE transmits HARQ-ACK information to the A / N PUCCH.
  • 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.
  • the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH.
  • -Opt. 1 Omit SR transmission and transmit HARQ-ACK (only) to A / N PUCCH
  • 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.
  • PRB physical resource block
  • CS cyclic shift
  • OCC orthogonal cover code
  • 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 .
  • 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).
  • the UE transmits HARQ-ACK (only) information to A / N PUCCH
  • -Opt. 1 Omit SR transmission and transmit HARQ-ACK (only) to A / N PUCCH
  • 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.
  • PRB physical resource block
  • CS cyclic shift
  • OCC orthogonal cover code
  • 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 .
  • 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).
  • -Opt. 4 Send HARQ-ACK information to SR PUCCH.
  • the HARQ-ACK information may be transmitted by multiplying a specific QPSK modulation symbol by the UCI sequence in the SR PUCCH.
  • 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.
  • the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH.
  • the UE transmits HARQ-ACK (only) information to the A / N PUCCH.
  • Opt. 2 based on the T at the time of the SR PUCCH transmission (start)
  • the UE transmits HARQ-ACK information to the A / N PUCCH.
  • the UE transmits HARQ-ACK information to the SR PUCCH.
  • the UCI sequence in the SR PUCCH transmitting HARQ-ACK information may be transmitted by multiplying a specific QPSK modulation symbol.
  • the UE 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.
  • the predetermined time T d may be a predetermined value or a value set by the base station.
  • the UE omits SR transmission and transmits HARQ-ACK (only) to A / N PUCCH
  • 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
  • a / N PUCCH is PF2 / 3/4 and CSI PUCCH is PF2 / 3/4
  • the UE transmits UCI including HARQ-ACK bit (s) and CSI bit (s) to A / N PUCCH.
  • 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.
  • (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.
  • 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.
  • the UE may perform UCI multiplexing as follows.
  • the UE transmits the UCI including the HARQ-ACK bit (s) and the CSI bit (s) to the CSI PUCCH.
  • the UE transmits the UCI including the HARQ-ACK bit (s) and the CSI bit (s) to the CSI PUCCH.
  • a (single) CSI PUCCH resource for transmitting the HARQ-ACK bit (s) and the CSI bit (s) may be selected.
  • the UE omits CSI transmission and transmits HARQ-ACK (only) to A / N PUCCH.
  • Case 3 A / N PUCCH, CSI PUCCH, and SR PUCCH overlap
  • UE can transmit UCI including HARQ-ACK bit (s), CSI bit (s), and explicit SR bit (s) to A / N PUCCH.
  • UCI including HARQ-ACK bit (s), CSI bit (s), and explicit SR bit (s) to A / N PUCCH.
  • 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.
  • (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.
  • 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.
  • the explicit SR bit (s) may include the following information on the basis of the A / N PUCCH transmission (start) time T1.
  • the explicit SR bit (s) indicates positive SR information.
  • the explicit SR bit (s) indicates negative SR information.
  • the explicit SR bit (s) indicates negative SR information.
  • the UE may perform UCI multiplexing as follows.
  • 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.
  • a (single) CSI PUCCH resource for transmitting the HARQ-ACK bit (s) and the CSI bit (s) may be selected.
  • 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).
  • 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.
  • 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).
  • 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.
  • 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
  • SR PUCCH scheduling request
  • SR scheduling request
  • a terminal via (terminal specific) higher layer signal (eg, RRC signaling)
  • the user equipment (OFDM symbol unit) for SR transmission
  • the (relative) PUCCH transmission start (OFDM) index in the PUCCH transmission period can be derived and applied as follows.
  • 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).
  • a slot means a basic scheduling unit composed of a plurality of (contiguous) OFDM symbols.
  • one slot may include 14 OFDM symbols.
  • 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 ).
  • the (SR) PUCCH transmission start (OFDM) symbol in a slot 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.
  • 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).
  • 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
  • the second symbol may be transmitted as an OFDM symbol (index) 0 in a (k + 1) th slot.
  • 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.
  • the nineteenth SR transmission method may be combined and applied together unless they are mutually arranged with other proposals of the present invention.
  • the UE 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.
  • a / N PUCCH HARQ-ACK transmission PUCCH resources
  • SR PUCCH SR transmission PUCCH resources
  • -UE skips (or stops) A / N transmission and transmits SR to SR PUCCH
  • the UE UCI multiplexes the corresponding A / N and the SR as a single PUCCH resource
  • 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.
  • a specific single eg, PCell (Primary Cell)
  • 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.
  • the T MUX -T 1 may mean a time point at which UE starts encoding for HARQ-ACK.
  • Opt. 1 (minimum) PDSCH-to-HARQ-ACK timing set to the UE (such as higher layer signal)
  • Opt. 3 (minimum) PDSCH-to-HARQ-ACK timing (or UE processing time) according to UE capability (or implementation)
  • the UE may perform UCI multiplexing (between HARQ-ACK and SR) according to the PUCCH Format.
  • a / N transmission with N PUCCH (Positive SR is expressed as CS increase)
  • the UE transmits an A / N modulation symbol to the SR PUCCH (Positive SR is represented by SR PUCCH selection / transmission).
  • 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.
  • the terminal may determine the priority between the SR and the HARQ-ACK as follows.
  • base station establishes a priority relationship with higher layer signals
  • 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.
  • the PDSCH-to-HARQ-ACK timing may be one of the following.
  • SR PUCCH and A / N PUCCH may refer to PUCCH resources configured and / or indicated for SR (only) and HARQ-ACK (only) transmission, respectively.
  • 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.
  • PDSCH-to-HARQ-ACK timing may mean a time from the PDSCH end time to the HARQ-ACK transmission time.
  • 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.
  • 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.
  • the UE 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.
  • 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.
  • the terminal 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.
  • 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.
  • the following options may be considered as a method for adjusting the priority between the HARQ-ACK and the SR.
  • Opt. 1 relative priority is set to a higher layer signal (eg RRC signaling)
  • Opt. 3 Relative priority determined by relationship between PDSCH-to-HARQ-ACK timing and SR period
  • 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. .
  • 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.
  • FIG. 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.
  • the SR period is shorter than (min) PDSCH-to-HARQ-ACK timing, indicating a case in which the SR has a higher priority.
  • the UE may omit HARQ-ACK transmission and transmit only the SR.
  • the UE may stop the HARQ-ACK transmission and perform the SR transmission.
  • FIG. 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the UE transmits an A / N modulation symbol to the SR PUCCH (Positive SR is represented by SR PUCCH selection / transmission).
  • the UE may omit the SR transmission and transmit only the A / N to the A / N PUCCH.
  • both the AN PUCCH and the SR PUCCH are PF 1
  • 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.
  • a / N PUCCH transmission PUCCH resources
  • SR PUCCH SR transmission PUCCH resources
  • a / N PUCCH is PF 2/3/4
  • SR PUCCH may be PF 0/1.
  • 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)
  • the modulation order for the SR bit (s) may be the same as A / N.
  • 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.
  • 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.
  • 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.
  • CRC Cyclic Redundancy Check
  • 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.
  • UB SR means the upper limit of the number of coded modulation symbols (per layer) for the SR.
  • 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.
  • 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 / N PUCCH is PF 2/3/4 and SR PUCCH is FP 0/1
  • -UE transmits UCI payload configured by adding SR bit (s) to A / N via A / N PUCCH
  • 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.
  • UE omits A / N transmission and transmits only SR PUCCH
  • -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
  • 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)
  • 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.
  • the CS increase may be applied to A / N PUCCH resources on full (OFDM) symbols or on overlapping SR (OFDM) symbols.
  • 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).
  • UE omits A / N transmission and transmits only SR PUCCH
  • UE transmits A / N to A / N PUCCH, but transmits (part or all) SR by changing CS (or sequence) on overlapped (OFDM) symbols
  • the UE transmits A / N to SR PUCCH resources. If a negative SR, the UE transmits A / N to A / N PUCCH resources.
  • 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).
  • UE omits A / N transmission and transmits only SR PUCCH
  • UE transmits A / N to A / N PUCCH, but transmits (part or all) SR by changing CS (or sequence) on overlapped (OFDM) symbols
  • 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.
  • 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).
  • PUCCH length e.g. PDSCH-to-HARQ-ACK timing
  • UCI 2 has priority over UCI 1 only when UCI 2 is Short PUCCH and the period (or (minimum) UL timing) is shorter.
  • UCI corresponding to A / N among UCI 1 and UCI 2 has higher priority.
  • a / N PUCCH is PF 3/4 and SR PUCCH is PF 1
  • -UE transmits UCI payload configured by adding SR bit (s) to A / N via A / N PUCCH
  • 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.
  • a / N PUCCH is PF 3/4 and SR PUCCH is PF 0
  • UE omits A / N transmission and transmits only SR PUCCH
  • 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
  • -UE transmits UCI payload configured by adding SR bit (s) to A / N via A / N PUCCH
  • 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.
  • a / N PUCCH is PF 1 and SR PUCCH is PF 1
  • the UE transmits A / N to SR PUCCH resources. If a negative SR, the UE transmits A / N to A / N PUCCH resources.
  • 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).
  • a / N PUCCH is PF 1 and SR PUCCH is PF 0
  • UE omits A / N transmission and transmits only SR PUCCH
  • UE transmits A / N to A / N PUCCH, but transmits (part or all) SR by changing CS (or sequence) on overlapped (OFDM) symbols
  • 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.
  • 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.
  • 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).
  • a / N PUCCH is PF 2 and SR PUCCH is PF 0/1
  • -UE transmits UCI payload configured by adding SR bit (s) to A / N via A / N PUCCH
  • 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.
  • a / N PUCCH is PF 0 and SR PUCCH is PF 0/1
  • 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.
  • the CS increase may be applied to A / N PUCCH resources on full (OFDM) symbols or on overlapping SR (OFDM) symbols.
  • 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).
  • 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.
  • the UE is UCI multiplexing HARQ-ACK and CSI.
  • Transmission on the PUCCH and the CSI reference resource can be determined as follows.
  • 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.
  • 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.
  • T A / N means A / N PUCCH transmission time point
  • T 1 may be one of the following.

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Abstract

L'invention concerne un procédé d'émission et de réception d'une demande de planification entre un terminal et une station de base dans un système de communication sans fil, et un dispositif prenant en charge ce procédé.
PCT/KR2018/005149 2017-05-03 2018-05-03 Procédé d'émission et de réception de demande de planification entre un terminal et une station de base dans un système de communication sans fil, et dispositif prenant en charge ce procédé WO2018203686A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP23156194.5A EP4203590A1 (fr) 2017-05-03 2018-05-03 Procédé d'émission et de réception d'une demande de planification entre un terminal et une station de base dans un système de communication sans fil et dispositif le prenant en charge
CN201880017517.8A CN110431905B (zh) 2017-05-03 2018-05-03 在无线通信系统中在终端和基站之间发送和接收调度请求的方法以及支持该方法的装置
JP2019535359A JP6845330B2 (ja) 2017-05-03 2018-05-03 無線通信システムにおいて端末と基地局の間のスケジューリング要請を送受信する方法及びそれを支援する装置
EP18794894.8A EP3471489B1 (fr) 2017-05-03 2018-05-03 Procédé d'émission et de réception de demande de planification entre un terminal et une station de base dans un système de communication sans fil, et dispositif prenant en charge ce procédé
CN202310140700.XA CN116318567A (zh) 2017-05-03 2018-05-03 发送和接收上行链路信号的方法以及用户设备和基站
US16/248,653 US10568124B2 (en) 2017-05-03 2019-01-15 Method for transmitting and receiving scheduling request between terminal and base station in wireless communication system and device for supporting same
US16/658,731 US11032838B2 (en) 2017-05-03 2019-10-21 Method for transmitting and receiving scheduling request between terminal and base station in wireless communication system and device for supporting same

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US201762501060P 2017-05-03 2017-05-03
US62/501,060 2017-05-03
US201762543946P 2017-08-10 2017-08-10
US62/543,946 2017-08-10
US201762547891P 2017-08-21 2017-08-21
US62/547,891 2017-08-21
US201762549367P 2017-08-23 2017-08-23
US62/549,367 2017-08-23
US201762555689P 2017-09-08 2017-09-08
US62/555,689 2017-09-08
US201762566341P 2017-09-30 2017-09-30
US62/566,341 2017-09-30
US201762586917P 2017-11-16 2017-11-16
US62/586,917 2017-11-16
US201762587519P 2017-11-17 2017-11-17
US62/587,519 2017-11-17
US201762590633P 2017-11-26 2017-11-26
US62/590,633 2017-11-26
US201862616461P 2018-01-12 2018-01-12
US62/616,461 2018-01-12
US201862620394P 2018-01-22 2018-01-22
US62/620,394 2018-01-22
US201862620982P 2018-01-23 2018-01-23
US62/620,982 2018-01-23
US201862630308P 2018-02-14 2018-02-14
US62/630,308 2018-02-14
US201862635476P 2018-02-26 2018-02-26
US62/635,476 2018-02-26
KR1020180051192A KR102004271B1 (ko) 2017-05-03 2018-05-03 무선 통신 시스템에서 단말과 기지국 간 스케줄링 요청을 송수신하는 방법 및 이를 지원하는 장치
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CN111263448A (zh) * 2018-12-29 2020-06-09 维沃移动通信有限公司 信息传输的方法和设备
CN111315030A (zh) * 2018-12-12 2020-06-19 中国信息通信研究院 一种低时延上行调度请求传输方法、终端设备和网络设备
CN111492710A (zh) * 2018-11-27 2020-08-04 联发科技股份有限公司 用于上行链路控制信息(uci)报告的多个物理上行链路控制信道(pucch)资源
CN111756488A (zh) * 2019-03-26 2020-10-09 株式会社Kt 用于发射和接收侧行链路harq反馈信息的方法和装置
CN111865510A (zh) * 2019-04-30 2020-10-30 大唐移动通信设备有限公司 一种harq-ack的传输方法、用户设备及网络侧设备
WO2020221167A1 (fr) * 2019-04-30 2020-11-05 维沃移动通信有限公司 Procédé de traitement de données et équipement utilisateur
WO2021008335A1 (fr) * 2019-07-12 2021-01-21 华为技术有限公司 Procédé de communication et appareil de communication
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WO2022217174A1 (fr) * 2021-04-06 2022-10-13 Qualcomm Incorporated Mappage de décalages cycliques pour des messages multiplexés ayant des priorités différentes
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US11956814B2 (en) 2021-04-06 2024-04-09 Qualcomm Incorporated Cyclic shift mapping for multiplexed messages with different priorities

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CN111315030A (zh) * 2018-12-12 2020-06-19 中国信息通信研究院 一种低时延上行调度请求传输方法、终端设备和网络设备
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CN111263448B (zh) * 2018-12-29 2024-03-22 维沃移动通信有限公司 信息传输的方法和设备
CN113287277A (zh) * 2019-01-09 2021-08-20 Idac控股公司 用于超可靠传输的增强型控制信令的方法、装置和系统
CN111756488A (zh) * 2019-03-26 2020-10-09 株式会社Kt 用于发射和接收侧行链路harq反馈信息的方法和装置
CN111756488B (zh) * 2019-03-26 2023-07-25 株式会社Kt 用于发射和接收侧行链路harq反馈信息的方法和装置
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WO2020221167A1 (fr) * 2019-04-30 2020-11-05 维沃移动通信有限公司 Procédé de traitement de données et équipement utilisateur
CN115396062A (zh) * 2019-06-14 2022-11-25 华为技术有限公司 应答信息的传输方法及装置
WO2021008335A1 (fr) * 2019-07-12 2021-01-21 华为技术有限公司 Procédé de communication et appareil de communication
WO2021109469A1 (fr) 2020-05-15 2021-06-10 Zte Corporation Schémas de mappage pour transmissions de commande de liaison montante dans des systèmes de communication sans fil
EP4082228A4 (fr) * 2020-05-15 2023-03-08 ZTE Corporation Schémas de mappage pour transmissions de commande de liaison montante dans des systèmes de communication sans fil
WO2022217174A1 (fr) * 2021-04-06 2022-10-13 Qualcomm Incorporated Mappage de décalages cycliques pour des messages multiplexés ayant des priorités différentes
US11956814B2 (en) 2021-04-06 2024-04-09 Qualcomm Incorporated Cyclic shift mapping for multiplexed messages with different priorities
CN115396081A (zh) * 2022-08-22 2022-11-25 中国电信股份有限公司 信号传输方法、装置、存储介质及电子设备

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