US-12628166-B2 - Method and apparatus for transmitting/receiving signal for groupcast in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. According to various embodiments of the present disclosure, a method performed by a transmission apparatus in a wireless communication system may be provided. The method may comprise the steps of: transmitting, via a physical downlink control channel (PDCCH), first control information for scheduling a group common-physical downlink shared channel (GC-PDSCH) via which multicast data is transmitted, including information related to hybrid automatic repeat request (HARQ) feedback for the multicast data; and transmitting, via the PDCCH, second control information for scheduling a physical downlink shared channel (PDSCH) via which unicast data is transmitted, including information related to HARQ feedback for the unicast data.

Inventors

• Jeongho Yeo
• Youngbum KIM
• Taehan Bae
• Sungjin Park
• Cheolkyu Shin

Assignees

• SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date

20260512

Application Date

20210720

Priority Date

20200805

Claims (20)

1. 1 . A method performed by a transmitting apparatus in a wireless communication system, the method comprising: transmitting first control information related to multicast including a first priority value; transmitting second control information related to unicast including a second priority value; transmitting first data based on the first control information; transmitting second data based on the second control information; and receiving feedback data based on one of the first control information and the second control information, wherein the first control information includes: information indicating a reference location, information indicating a threshold distance, and information having a first value or a second value, wherein the first value indicates that, in case that a distance of a receiving apparatus from the reference location is less than the threshold distance, the receiving apparatus performs feedback for the multicast, and the second value indicates that, in case that the distance of the receiving apparatus from the reference location is greater than or equal to the threshold distance, the receiving apparatus performs feedback for the multicast.
2. 2 . The method of claim 1 , wherein the first control information is related to hybrid automatic repeat request (HARQ) feedback for multicast.
3. 3 . The method of claim 1 , wherein the feedback data is related to hybrid automatic repeat request (HARQ) feedback.
4. 4 . The method of claim 1 , wherein, in case that the feedback data is based on the first control information, other feedback data is not received based on the second control information.
5. 5 . The method of claim 1 , wherein the second control information is related to hybrid automatic repeat request (HARQ) feedback for unicast.
6. 6 . A method performed by a receiving apparatus in a wireless communication system, the method comprising: receiving first control information related to multicast including a first priority value; receiving second control information related to unicast including a second priority value; receiving first data based on the first control information; receiving second data based on the second control information; and transmitting feedback data based on one of the first control information and the second control information, wherein the first control information includes: information indicating a reference location, information indicating a threshold distance, and information having a first value or a second value, wherein the first value indicates that, in case that a distance of the receiving apparatus from the reference location is less than the threshold distance, the receiving apparatus performs feedback for the multicast, and the second value indicates that, in case that the distance of the receiving apparatus from the reference location is greater than or equal to the threshold distance, the receiving apparatus performs feedback for the multicast.
7. 7 . The method of claim 6 , wherein the first control information is related to hybrid automatic repeat request (HARQ) feedback for multicast.
8. 8 . The method of claim 6 , wherein the feedback data is related to hybrid automatic repeat request (HARQ) feedback.
9. 9 . The method of claim 6 , wherein, in case that the feedback data is based on the first control information, other feedback data is not received based on the second control information.
10. 10 . The method of claim 6 , wherein the second control information is related to hybrid automatic repeat request (HARQ) feedback for unicast.
11. 11 . A transmitting apparatus in a wireless communication system, the transmitting apparatus comprising: a transceiver; and at least one processor coupled to the transceiver and configured to: transmit first control information related to multicast including a first priority value, transmit second control information related to unicast including a second priority value, transmit first data based on the first control information; transmit second data based on the second control information; and receive feedback data based on one of the first control information and the second control information, wherein the first control information includes: information indicating a reference location, information indicating a threshold distance, and information having a first value or a second value, wherein the first value indicates that, in case that a distance of a receiving apparatus from the reference location is less than the threshold distance, the receiving apparatus performs feedback for the multicast, and the second value indicates that, in case that the distance of the receiving apparatus from the reference location is greater than or equal to the threshold distance, the receiving apparatus performs feedback for the multicast.
12. 12 . The transmitting apparatus of claim 11 , wherein the first control information is related to hybrid automatic repeat request (HARQ) feedback for multicast.
13. 13 . The transmitting apparatus of claim 11 , wherein the feedback data is related to hybrid automatic repeat request (HARQ) feedback.
14. 14 . The transmitting apparatus of claim 11 , wherein, in case that the feedback data is based on the first control information, other feedback data is not received based on the second control information.
15. 15 . The transmitting apparatus of claim 11 , wherein the second control information is related to hybrid automatic repeat request (HARQ) feedback for unicast.
16. 16 . A receiving apparatus in a wireless communication system, the receiving apparatus comprising: a transceiver; and at least one processor coupled to the transceiver and configured to: receive first control information related to for multicast including a first priority value, receive second control information related to unicast including a second priority value, receive first data based on the first control information, receive second data based on the second control information, and transmit feedback data based on one of the first control information and the second control information, wherein the first control information includes: information indicating a reference location, information indicating a threshold distance, and information having a first value or a second value, wherein the first value indicates that, in case that a distance of the receiving apparatus from the reference location is less than the threshold distance, the receiving apparatus performs feedback for the multicast, and the second value indicates that, in case that the distance of the receiving apparatus from the reference location is greater than or equal to the threshold distance, the receiving apparatus performs feedback for the multicast.
17. 17 . The receiving apparatus of claim 16 , wherein the first control information is related to hybrid automatic repeat request (HARQ) feedback for multicast.
18. 18 . The receiving apparatus of claim 16 , wherein the feedback data is related to hybrid automatic repeat request (HARQ) feedback.
19. 19 . The receiving apparatus of claim 16 , wherein the second control information is related to hybrid automatic repeat request (HARQ) feedback for unicast.
20. 20 . The receiving apparatus of claim 16 , wherein, in case that the feedback data is based on the first control information, other feedback data is not received based on the second control information.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a 371 of International Application No. PCT/KR2021/009303 filed on Jul. 20, 2021, which claims priority to Korean Patent Application No. 10-2020-0098234 filed on Aug. 5, 2020, the disclosures of which are herein incorporated by reference in their entirety. BACKGROUND 1. Field The disclosure relates to a wireless communication system, and more particularly, to a method and apparatus to transmit/receive a signal for groupcast and/or multicast. 2. Description of Related Art Wireless communication technologies have been developed mainly for human services, such as voice, multimedia, and data communication. As 5th-generation (5G) communication systems are commercially available, connected devices are expected to explosively increase and to be connected to a communication network. Examples of things connected to a network may include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction machinery, and factory equipment. Mobile devices will evolve into various form factors, such as augmented reality glasses, virtual reality headsets, and hologram devices. In the 6th-generation (6G) era, efforts are being made to develop an enhanced 6G communication system to provide various services by connecting hundreds of billions of devices and things. For this reason, the 6G communication system is called a beyond 5G system. In the 6G communication system expected to be realized around year 2030, the maximum transmission rate is tera (i.e., 1000 gigabit) bps, and the wireless latency is 100 microseconds (μsec). In other words, the transmission rate of the 6G communication system is 50 times faster than that of the 5G communication system, and the wireless latency is reduced to one tenth. To achieve these high data rates and ultra-low latency, 6G communication systems are considered to be implemented in terahertz bands (e.g., 95 gigahertz (95 GHz) to 3 terahertz (3 THz) bands). As the path loss and atmospheric absorption issues worsen in the terahertz band as compared with millimeter wave (mmWave) introduced in 5G, technology that may guarantee signal reach, that is, coverage, would become more important. As major techniques for ensuring coverage, there need to be developed multi-antenna transmission techniques, such as new waveform, beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, or large-scale antennas, which exhibit better coverage characteristics than radio frequency (RF) devices and orthogonal frequency division multiplexing (OFDM). New technologies, such as a metamaterial-based lens and antennas, high-dimensional spatial multiplexing technology using an orbital angular momentum (OAM), and a reconfigurable intelligent surface (RIS), are being discussed to enhance the coverage of the terahertz band signals. For 6G communication systems to enhance frequency efficiency and system network for 6G communication systems include full-duplex technology, there are being developed full-duplex technology in which uplink and downlink simultaneously utilize the same frequency resource at the same time, network technology that comprehensively use satellite and high-altitude platform stations (HAPSs), network architecture innovation technology that enables optimization and automation of network operation and supports mobile base stations, dynamic spectrum sharing technology through collision avoidance based on prediction of spectrum usages, artificial intelligence (AI)-based communication technology that uses AI from the stage of designing and internalizes end-to-end AI supporting function to thereby optimize the system, and next-generation distributed computing technology that realizes services that exceed the limitation of the UE computation capability by ultra-high performance communication and mobile edge computing (MEC) or clouds. Further, continuous attempts have been made to reinforce connectivity between device, further optimizing the network, prompting implementation of network entities in software, and increase the openness of wireless communication by the design of a new protocol to be used in 6G communication systems, implementation of a hardware-based security environment, development of a mechanism for safely using data, and development of technology for maintaining privacy. Such research and development efforts for 6G communication systems would implement the next hyper-connected experience via hyper-connectivity of 6G communication systems which encompass human-thing connections as well as thing-to-thing connections. Specifically, the 6G communication system would be able to provide services, such as truly immersive extended reality (XR), high-fidelity mobile hologram, and digital replica. Further, services, such as remote surgery, industrial automation and emergency response would be provided through the 6G communication system thanks t