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US-12627415-B2 - Method and device for determining number of HARQ process IDs and transmitting HARQ-ACK in wireless communication system

US12627415B2US 12627415 B2US12627415 B2US 12627415B2US-12627415-B2

Abstract

The present disclosure provides a method performed by a terminal in a wireless communication system. The method comprising the steps of: receiving first information for setting the number of HARQ processes associated with a PDSCH; confirming whether a first SCS for a first BWP is set to 480 kHz or 960 kHz; confirming whether a second SCS for a second BWP is set to a value other than 480 kHz and 960 kHz; and receiving the PDSCH on the basis of the first BWP or the second BWP, wherein the number of HARQ processes can be supported up to 32 in the second BWP in which the second SCS is set, if 32 HARQ processes set on the basis of the first information are associated with the first SCS.

Inventors

  • Kyungjun CHOI
  • Seongmok LIM
  • Youngrok Jang
  • Hyoungju JI

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260512
Application Date
20221230
Priority Date
20211230

Claims (15)

  1. 1 . A method performed by a terminal in a wireless communication system, the method comprising: identifying that a first subcarrier spacing (SCS) for a first bandwidth part (BWP) is one of 480 KHz or 960 KHz; identifying that a second SCS for a second BWP is 120 KHz; receiving information on a configured grant configuration for transmission of an uplink channel; receiving downlink control information (DCI) for indicating configured grant-downlink feedback information (CG-DFI) associated with the uplink channel; and receiving a physical downlink shared channel (PDSCH) based on the first BWP or the second BWP wherein the DCI includes a hybrid automatic repeat request-acknowledgement (HARQ-ACK) bitmap field, wherein a number of bits of the HARQ-ACK bitmap field is 32 bits, in case that the information on the configured grant configuration includes information on a number of HARQ processes associated with the uplink channel, and wherein the number of HARQ processes is greater than 16.
  2. 2 . The method of claim 1 , further comprising: receiving first information for configuring a number of HARQ processes associated with the PDSCH wherein, in case that the number of HARQ processes associated with the PDSCH is 32 for the first SCS, up to 32 HARQ processes are supported in the second BWP for which the second SCS is configured.
  3. 3 . The method of claim 1 , further comprising: receiving, via radio resource control (RRC) signaling, second information associated with a number of bits of an HARQ process number field in second DCI; and receiving the second DCI including the HARQ process number field, wherein whether the number of bits of the HARQ process number field is 5 bits is based on the second information.
  4. 4 . The method of claim 1 , further comprising: transmitting uplink control information (UCI) associated with a configured grant, based on the uplink channel, wherein the UCI comprises an HARQ process number field, and wherein the HARQ process number field of the UCI comprises 5 bits, based on the number of HARQ processes associated with the uplink channel being greater than 16 in the information on the configured grant configuration.
  5. 5 . The method of claim 1 , further comprising: receiving information for configuring an offset of the HARQ processes associated with the uplink channel; and transmitting uplink control information (UCI) associated with a configured grant, based on the uplink channel, wherein the UCI comprises an HARQ process number field, and wherein in case that a sum of the number of the HARQ processes associated with the uplink channel and a value of the offset is greater than 16, the HARQ process number field of the UCI comprises 5 bits, and the number of bits of the HARQ-ACK bitmap field is 32 bits.
  6. 6 . The method of claim 1 , further comprising: receiving configurations for multiple configured grants for uplink channel transmission; and identifying third information for configuring a number of HARQ processes corresponding to each configured grant and fourth information for configuring offsets of HARQ processes, wherein, in case that a number of bits of an HARQ-ACK bitmap field determined based on the third information and fourth information corresponding to at least one configured grant among the multiple configured grants is 32 bits, the number of bits of the HARQ-ACK bitmap field included in the DCI is 32 bits.
  7. 7 . The method of claim 2 , further comprising: identifying that the second BWP is an active BWP; generating a HARQ-ACK codebook, based on a number of HARQ processes corresponding to the second BWP; and transmitting an uplink channel comprising the HARQ-ACK codebook.
  8. 8 . A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, information on a configured grant configuration for transmission of an uplink channel; transmitting, to the terminal, downlink control information (DCI) for indicating configured grant-downlink feedback information (CG-DFI) associated with the uplink channel; and transmitting, to the terminal, a physical downlink shared channel (PDSCH) based on a first bandwidth part (BWP) or a second BWP, wherein a first subcarrier spacing (SCS) for the first BWP is configured to be 480 kHz or 960 kHz, and a second SCS for the second BWP is configured to be 120 KHz, wherein the DCI includes a hybrid automatic repeat request-acknowledgement (HARQ-ACK) bitmap field, wherein a number of bits of the HARQ-ACK bitmap field is 32 bits, in case that information on a number of HARQ processes associated with the uplink channel is configured in the information on the configured grant configuration, and wherein the number of HARQ processes is greater than 16.
  9. 9 . The method of claim 8 , further comprising: transmitting, to the terminal, first information for configuring a number of HARQ processes associated with the PDSCH wherein in case that the number of HARQ processes associated with the PDSCH configured based on the first information is 32 for the first SCS, up to 32 HARQ processes are supported in the second BWP for which the second SCS is configured.
  10. 10 . The method of claim 8 , further comprising: transmitting, to the terminal via radio resource control (RRC) signaling, second information associated with a number of bits of an HARQ process number field in second DCI; and transmitting the second DCI including the HARQ process number field to the terminal, wherein whether the number of bits of the HARQ process number field is 5 bits is determined based on the second information.
  11. 11 . The method of claim 8 , further comprising: receiving uplink control information (UCI) associated with a configured grant, based on the uplink channel, wherein the UCI comprises an HARQ process number field, and wherein the HARQ process number field of the UCI comprises 5 bits, based on the number of HARQ processes associated with the uplink channel being set to a value greater than 16 in the information on the configured grant configuration.
  12. 12 . A terminal of a wireless communication system, the terminal comprising: a transceiver; and a controller functionally connected to the transceiver and configured to: identify that a first subcarrier spacing (SCS) for a first bandwidth part (BWP) is one of 480 kHz or 960 kHz, identify that a second SCS for a second BWP is 120 kHz, receive information on a configured grant configuration for transmission of an uplink channel, receive downlink control information (DCI) for indicating configured grant-downlink feedback information (CG-DFI) associated with the uplink channel, and receive a physical downlink shared channel (PDSCH) based on the first BWP or the second BWP wherein the DCI includes a hybrid automatic repeat request-acknowledgement (HARQ-ACK) bitmap field, wherein a number of bits of the HARQ-ACK bitmap field is 32 bits, in case that the information on the configured grant configuration includes information on a number of HARQ processes associated with the uplink channel, and wherein the number of HARQ processes is greater than 16.
  13. 13 . The terminal of claim 12 , wherein the controller is further configured to: receive first information for configuring a number of HARQ processes associated with the PDSCH, and wherein, in case that the number of HARQ processes associated with the PDSCH is 32 for the first SCS, up to 32 HARQ processes are supported in the second BWP for which the second SCS is configured.
  14. 14 . A base station of a wireless communication system, the base station comprising: a transceiver; and a controller functionally connected to the transceiver and configured to: transmit, to a terminal, information on a configured grant configuration for transmission of an uplink channel, transmit, to the terminal, downlink control information (DCI) for indicating configured grant-downlink feedback information (CG-DFI) associated with the uplink channel, and transmit, to the terminal, a physical downlink shared channel (PDSCH) based on a first bandwidth part (BWP) or a second BWP, wherein a first subcarrier spacing (SCS) for the first BWP is configured to be 480 KHz or 960 kHz, and a second SCS for the second BWP is configured to be 120 kHz, wherein the DCI includes a hybrid automatic repeat request-acknowledgement (HARQ-ACK) bitmap field, wherein a number of bits of the HARQ-ACK bitmap field is 32 bits, in case that information on a number of HARQ processes associated with the uplink channel is configured in the information on the configured grant configuration, and wherein the number of HARQ processes is greater than 16.
  15. 15 . The base station of claim 14 , wherein the controller is further configured to: transmit, to the terminal, first information for configuring a number of HARQ processes associated with the PDSCH, and wherein in case that the number of HARQ processes associated with the PDSCH configured based on the first information is 32 for the first SCS, up to 32 HARQ processes are supported in the second BWP for which the second SCS is configured.

Description

TECHNICAL FIELD The disclosure relates to operations of a terminal and a base station in a wireless communication system. Specifically, the disclosure relates to a method for determining the number of HARQ processes by a terminal, a method for HARQ-ACK transmission according to the determination, and a device capable of performing the same. BACKGROUND ART 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6 GHz” bands such as 3.5 GHz, but also in “Above 6 GHz” bands referred to as mmWave including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95 GHz to 3 THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G. In the initial stage of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand, (eMBB), Ultra Reliable & Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for alleviating radio-wave path loss and increasing radio-wave transmission distances in mmWave, numerology (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large-capacity data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network customized to a specific service. Currently, there is ongoing discussion regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for securing coverage in an area in which communication with terrestrial networks is impossible, and positioning. Moreover, there has been ongoing standardization in wireless interface architecture/protocol fields regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture/service fields regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions. If such 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR), and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication. Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for securing coverage in terahertz bands of 6G mobile communication technologies, Full Dimensional MIMO (FD-MIMO), multi-antenna transmission technologies such as array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM