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US-20260129657-A1 - METHOD AND APPARATUS FOR TRANSMISSION AND RECEPTION OF CONTROL INFORMATION REPETITION IN SATELLITE COMMUNICATION SYSTEM

US20260129657A1US 20260129657 A1US20260129657 A1US 20260129657A1US-20260129657-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to an embodiment, a method performed by a user equipment (UE) in a communication system includes receiving a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH); identifying whether physical downlink control channel (PDCCH) corresponding to type0 PDCCH common search space (CSS) is repeated based on one PBCH payload bit included in PBCH payload of the PBCH; and monitoring the PDCCH based on the identification.

Inventors

  • Sungjin Park
  • Hyoungju JI
  • Kyungjun CHOI

Assignees

  • SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date
20260507
Application Date
20251106
Priority Date
20241106

Claims (20)

  1. 1 . A method performed by a user equipment (UE) in a communication system, the method comprising: receiving a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH); identifying whether physical downlink control channel (PDCCH) corresponding to type0 PDCCH common search space (CSS) is repeated based on one PBCH payload bit included in PBCH payload of the PBCH; and monitoring the PDCCH based on the identification.
  2. 2 . The method of claim 1 , wherein, in case that a value of the one PBCH payload bit is 1, the PDCCH is repeated, and wherein, in case that the value of the one PBCH payload bit is 0, the PDCCH is not repeated.
  3. 3 . The method of claim 1 , wherein the PBCH payload includes a 0 , a 1 , a 2 , . . . , a A−1 PBCH payload bits associated with a higher layer and a A , a A+1 , a A+2 , . . . , a A+7 PBCH payload bits associated with a physical layer, and wherein the one PBCH payload bit corresponds to a A+7 .
  4. 4 . The method of claim 1 , wherein, in case that the PDCCH is repeated, a same PDCCH candidate for aggregation level in two consecutive slots provides same information for downlink control information (DCI) with cyclic redundancy check (CRC) scrambled by a system information radio network temporary identifier (SI-RNTI).
  5. 5 . The method of claim 1 , wherein the PDCCH is received in a non-terrestrial network (NTN).
  6. 6 . A user equipment (UE) in a communication system, the UE comprising: a transceiver; and a processor coupled with the transceiver and configured to: receive a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH); identify whether physical downlink control channel (PDCCH) corresponding to type0 PDCCH common search space (CSS) is repeated based on one PBCH payload bit included in PBCH payload of the PBCH; and monitor the PDCCH based on the identification.
  7. 7 . The UE of claim 6 , wherein, in case that a value of the one PBCH payload bit is 1, the PDCCH is repeated, and wherein, in case that the value of the one PBCH payload bit is 0, the PDCCH is not repeated.
  8. 8 . The UE of claim 6 , wherein the PBCH payload includes a 0 , a 1 , a 2 , . . . , a A−1 PBCH payload bits associated with a higher layer and a A , a A+1 , a A+2 , . . . , a A+7 PBCH payload bits associated with a physical layer, and wherein the one PBCH payload bit corresponds to a A+7 .
  9. 9 . The UE of claim 6 , wherein, in case that the PDCCH is repeated, a same PDCCH candidate for aggregation level in two consecutive slots provides same information for downlink control information (DCI) with cyclic redundancy check (CRC) scrambled by a system information radio network temporary identifier (SI-RNTI).
  10. 10 . The UE of claim 6 , wherein the PDCCH is received in a non-terrestrial network (NTN).
  11. 11 . A method performed by a base station in a communication system, the method comprising: transmitting a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH), wherein one PBCH payload bit included in PBCH payload of the PBCH indicates whether physical downlink control channel (PDCCH) corresponding to type0 PDCCH common search space (CSS) is repeated; and transmitting the PDCCH.
  12. 12 . The method of claim 11 , wherein, in case that a value of the one PBCH payload bit is 1, the PDCCH is repeated, and wherein, in case that the value of the one PBCH payload bit is 0, the PDCCH is not repeated.
  13. 13 . The method of claim 11 , wherein the PBCH payload includes a 0 , a 1 , a 2 , . . . , a A−1 PBCH payload bits associated with a higher layer and a A , a A+1 , a A+2 , . . . , a A+7 PBCH payload bits associated with a physical layer, and wherein the one PBCH payload bit corresponds to a A+7 .
  14. 14 . The method of claim 11 , wherein, in case that the PDCCH is repeated, a same PDCCH candidate for aggregation level in two consecutive slots provides same information for downlink control information (DCI) with cyclic redundancy check (CRC) scrambled by a system information radio network temporary identifier (SI-RNTI).
  15. 15 . The method of claim 11 , wherein the PDCCH is transmitted in a non-terrestrial network (NTN).
  16. 16 . A base station in a communication system, the base station comprising: a transceiver; and a processor coupled with the transceiver and configured to: transmit a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH), wherein one PBCH payload bit included in PBCH payload of the PBCH indicates whether physical downlink control channel (PDCCH) corresponding to type0 PDCCH common search space (CSS) is repeated; and transmit the PDCCH.
  17. 17 . The base station of claim 16 , wherein, in case that a value of the one PBCH payload bit is 1, the PDCCH is repeated, and wherein, in case that the value of the one PBCH payload bit is 0, the PDCCH is not repeated.
  18. 18 . The base station of claim 16 , wherein the PBCH payload includes a 0 , a 1 , a 2 , . . . a A−1 PBCH payload bits associated with a higher layer and a A , a A+1 , a A+2 , . . . , a A+7 PBCH payload bits associated with a physical layer, and wherein the one PBCH payload bit corresponds to a A+7 .
  19. 19 . The base station of claim 16 , wherein, in case that the PDCCH is repeated, a same PDCCH candidate for aggregation level in two consecutive slots provides same information for downlink control information (DCI) with cyclic redundancy check (CRC) scrambled by a system information radio network temporary identifier (SI-RNTI).
  20. 20 . The base station of claim 16 , wherein the PDCCH is transmitted in a non-terrestrial network (NTN).

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2024-0156164 filed on Nov. 6, 2024 in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field The disclosure relates to an operation of a user equipment (UE) and a base station in a satellite communication system. More particularly, the disclosure relates to a data information transmission and reception method in a satellite communication system and an apparatus that may perform the same. 2. Description of Related Art 5th generation (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 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. At the beginning of the development 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 mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (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 amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service. Currently, there are ongoing discussions 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 (Vehicle-to-everything) 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 providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning. Moreover, there has been ongoing standardization in air interface architecture/protocol 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 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. As 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 AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) 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 no