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EP-4742606-A2 - METHOD, APPARATUS, AND SYSTEM FOR TRANSMITTING OR RECEIVING PHYSICAL UPLINK SHARED CHANNEL (PUSCH) IN WIRELESS COMMUNICATION SYSTEM

EP4742606A2EP 4742606 A2EP4742606 A2EP 4742606A2EP-4742606-A2

Abstract

Disclosed is a method for a user equipment to transmit a physical uplink shared channel (PUSCH) to a base station in a wireless communication system. The user equipment may receive, from the base station, configuration information for PUSCH transmission and a physical downlink control channel (PDCCH) for scheduling repeated transmission of the PUSCH. Thereafter, the user equipment may determine one or more invalid symbols for the repeated transmission of the PUSCH, and may repeatedly transmit the PUSCH on symbols other than the determined symbols.

Inventors

  • CHOI, Kyungjun
  • NOH, MINSEOK
  • KWAK, JINSAM

Assignees

  • Wilus Institute of Standards and Technology Inc.

Dates

Publication Date
20260513
Application Date
20200803

Claims (18)

  1. A user equipment, UE, (100) configured to operate in a wireless communication system, the UE comprising: a communication module (120); and a processor (110) for controlling the communication module, wherein the processor is configured to: receive scheduling information for a physical uplink shared channel, PUSCH, transmission, the PUSCH transmission including a plurality of PUSCH repetitions; determine that at least one symbol scheduled for the PUSCH transmission overlaps with at least one symbol of a control resource set #0, CORESET #0, indicated by a physical broadcast channel, PBCH; determine at least one invalid symbol for the PUSCH transmission, the at least one invalid symbol including the at least one overlapping symbol of CORESET #0; and perform the PUSCH transmission on at least one symbol scheduled by the scheduling information, that is not part of the at least one invalid symbol, wherein the processor is configured to split a PUSCH repetition, of the PUSCH transmission, that extends across a slot boundary into separate PUSCH repetitions such that each of the separate PUSCH repetitions is confined within a respective slot.
  2. The UE of claim 1, wherein the at least one invalid symbol further includes a symbol indicated as a semi-static downlink symbol, and/or a symbol of a synchronization signal/physical broadcast channel, SS/PBCH, block.
  3. The UE of claim 1 or 2, wherein when the UE supports a half duplex capability, the at least one invalid symbol further includes, in a cell other than a cell where the PUSCH transmission is performed: (i) a symbol allocated for downlink reception, and/or (ii) a symbol indicated as a semi-static downlink symbol.
  4. The UE of any one of claims 1 to 3, wherein the at least one invalid symbol further includes a gap symbol located after a last symbol of consecutive semi-static downlink symbols.
  5. The UE of claim 4, wherein the gap symbol is defined using a reference subcarrier spacing in a time division duplex uplink and downlink configuration common, TDD-UL-DL-ConfigurationCommon.
  6. The UE of any one of claims 1 to 5, wherein when a physical uplink control channel, PUCCH, overlaps with two or more PUSCH repetitions of the PUSCH transmission, uplink control information, UCI, associated with the PUCCH is transmitted via an earliest PUSCH repetition, among the overlapping two or more PUSCH repetitions, that includes more than one symbol and that satisfies a condition for multiplexing the UCI in the earliest PUSCH repetition.
  7. The UE of claim 6, wherein the condition includes a processing time condition for multiplexing the UCI in the earliest PUSCH repetition.
  8. A method performed by a user equipment, UE, in a wireless communication system, the method comprising: receiving scheduling information for a physical uplink shared channel, PUSCH, transmission, the PUSCH transmission including a plurality of PUSCH repetitions; determining that at least one symbol scheduled for the PUSCH transmission overlaps with at least one symbol of a control resource set #0, CORESET #0, indicated by a physical broadcast channel, PBCH; determining at least one invalid symbol for the PUSCH transmission, the at least one invalid symbol including the at least one overlapping symbol of CORESET #0; and performing the PUSCH transmission on at least one symbol scheduled by the scheduling information, that is not part of the at least one invalid symbol, wherein the UE splits a PUSCH repetition, of the PUSCH transmission, that extends across a slot boundary into separate PUSCH repetitions such that each of the separate PUSCH repetitions is confined within a respective slot.
  9. The method of claim 8, wherein the at least one invalid symbol further includes a symbol indicated as a semi-static downlink symbol, and/or a symbol of a synchronization signal/physical broadcast channel, SS/PBCH, block.
  10. The method of claim 8 or 9, wherein when the UE supports a half duplex capability, the at least one invalid symbol further includes, in a cell other than a cell where the PUSCH transmission is performed: (i) a symbol allocated for downlink reception, and/or (ii) a symbol indicated as a semi-static downlink symbol.
  11. The method of any one of claims 8 to 10, wherein the at least one invalid symbol further includes a gap symbol located after a last symbol of consecutive semi-static downlink symbols.
  12. The method of claim 11, wherein the gap symbol is defined using a reference subcarrier spacing in a time division duplex uplink and downlink configuration common, TDD-UL-DL-ConfigurationCommon.
  13. The method of any one of claims 8 to 12, wherein when a physical uplink control channel, PUCCH, overlaps with two or more PUSCH repetitions of the PUSCH transmission, uplink control information, UCI, associated with the PUCCH is transmitted via an earliest PUSCH repetition, among the overlapping two or more PUSCH repetitions, that includes more than one symbol and that satisfies a condition for multiplexing the UCI in the earliest PUSCH repetition.
  14. The method of claim 13, wherein the condition includes a processing time condition for multiplexing the UCI in the earliest PUSCH repetition.
  15. A base station, BS, (200) configured to operate in a wireless communication system, the BS comprising: a communication module (220); and a processor (210) for controlling the communication module, wherein the processor is configured to: transmit scheduling information for a physical uplink shared channel, PUSCH, transmission, the PUSCH transmission including a plurality of PUSCH repetitions; determine that at least one symbol scheduled for the PUSCH transmission overlaps with at least one symbol of a control resource set #0, CORESET #0, indicated by a physical broadcast channel, PBCH; determine at least one invalid symbol for the PUSCH transmission, the at least one invalid symbol including the at least one overlapping symbol of CORESET #0; and receive the PUSCH transmission on at least one symbol scheduled by the scheduling information, that is not part of the at least one invalid symbol, wherein a PUSCH repetition, of the PUSCH transmission, that extends across a slot boundary is split into separate PUSCH repetitions such that each of the separate PUSCH repetitions is confined within a respective slot.
  16. The BS of claim 15, wherein when a physical uplink control channel, PUCCH, overlaps with two or more PUSCH repetitions of the PUSCH transmission, uplink control information, UCI, associated with the PUCCH is received via an earliest PUSCH repetition, among the overlapping two or more PUSCH repetitions, that includes more than one symbol and that satisfies a condition for multiplexing the UCI in the earliest PUSCH repetition.
  17. A method performed by a base station, BS, (200) in a wireless communication system, the method comprising: transmitting scheduling information for a physical uplink shared channel, PUSCH, transmission, the PUSCH transmission including a plurality of PUSCH repetitions; determining that at least one symbol scheduled for the PUSCH transmission overlaps with at least one symbol of a control resource set #0, CORESET #0, indicated by a physical broadcast channel, PBCH; determining at least one invalid symbol for the PUSCH transmission, the at least one invalid symbol including the at least one overlapping symbol of CORESET #0; and receiving the PUSCH transmission on at least one symbol scheduled by the scheduling information, that is not part of the at least one invalid symbol, wherein a PUSCH repetition, of the PUSCH transmission, that extends across a slot boundary is split into separate PUSCH repetitions such that each of the separate PUSCH repetitions is confined within a respective slot.
  18. The method of claim 17, wherein when a physical uplink control channel, PUCCH, overlaps with two or more PUSCH repetitions of the PUSCH transmission, uplink control information, UCI, associated with the PUCCH is received via an earliest PUSCH repetition, among the overlapping two or more PUSCH repetitions, that includes more than one symbol and that satisfies a condition for multiplexing the UCI in the earliest PUSCH repetition.

Description

TECHNICAL FIELD The present invention relates to a wireless communication system, and more particularly, to a method for transmitting/receiving a physical uplink shared channel (PUSCH) in a wireless communication system. BACKGROUND ART 3GPP LTE(-A) defines uplink/downlink physical channels to transmit physical layer signals. For example, a physical uplink shared channel (PUSCH) that is a physical channel for transmitting data through an uplink, a physical uplink control channel (PUCCH) for transmitting a control signal, a physical random access channel (PRACH), and the like are defined, and there are a physical downlink shared channel (PDSCH) for transmitting data to a downlink as well as a physical control format indicator channel (PCFICH) for transmitting L1/L2 control signals, a physical downlink control channel (PDCCH), a physical hybrid ARQ indicator channel (PHICH), and the like. The downlink control channels (PDCCH/EPDCCH) among the above channels are channels for a base station to transmit uplink/downlink scheduling allocation control information, uplink transmit power control information, and other control information to one or more user equipments. Since resources available for PDCCH that can be transmitted by a base station at one time are limited, different resources cannot be allocated to each user equipment, and control information should be transmitted to an arbitrary user equipment by sharing resources. For example, in 3GPP LTE(-A), four resource elements (REs) may be grouped to form a resource element group (REG), nine control channel elements (CCEs) may be generated, resources capable of combining and sending one or more CCEs may be notified to a user equipment, and multiple user equipments may share and use CCEs. Here, the number of combined CCEs is referred to as a CCE combination level, and a resource to which CCE is allocated according to a possible CCE combination level is referred to as a search space. The search space may include a common search space defined for each base station and a terminal-specific or UE-specific search space defined for each user equipment. A user equipment performs decoding for the number of cases of all possible CCE combinations in the search space, and may recognize whether the user equipment belongs to a PDCCH through a user equipment (UE) identifier included in the PDCCH. Therefore, such an operation of a user equipment requires a long time for decoding a PDCCH and unavoidably causes a large amount of energy consumption. Efforts are being made to develop an improved 5G communication system or pre-5G communication system to satisfy wireless data traffic demand that is increasing after the commercialization of a 4G communication system. For this reason, a 5G communication system or pre-5G communication system is referred to as a beyond 4G network communication system or post-LTE system. It is considered to implement a 5G communication system in an ultrahigh frequency (mmWave) band (e.g., 60-GHz band) to achieve a high data transfer rate. To reduce a radio propagation path loss and increase a transfer distance of radio waves in an ultrahigh frequency band, beamforming, massive MIMO, full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large scale antenna technologies are discussed in the field of a 5G communication system. Furthermore, to improve a network of a system, technologies such as advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, device-to-device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), interference cancellation, and the like are developed in the field of a 5G communication system. In addition, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC), which are advanced coding modulation (ACM) schemes, and filter bank multi carrier (FBMC), nonorthogonal multiple access (NOMA), and sparse code multiple access (SCMA), which are advanced access technologies, are developed in the field of a 5G system. Meanwhile, in a human-centric connection network where humans generate and consume information, the Internet has evolved into the Internet of Things (IoT) network, which exchanges information among distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connection with cloud servers, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, so that in recent years, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) have been studied for connection between objects. In the IoT environment, an intelligent internet technology (IT) service that collects and analyzes data generated from connected objects to c