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US-20260129541-A1 - METHOD AND APPARATUS FOR USING CONDITION AND NON-CONDITION DURING LOWER-LAYER TRIGGERED MOBILITY OF TERMINAL IN WIRELESS COMMUNICATION SYSTEMS

US20260129541A1US 20260129541 A1US20260129541 A1US 20260129541A1US-20260129541-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a UE in a wireless communication system may include receiving, from a base station, configuration information on an LTM including an execution condition for an LTM cell switch; and performing an evaluation for the execution condition of the LTM cell switch based on the configuration information, after the LTM cell switch.

Inventors

  • June Hwang
  • Seungri Jin

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 wireless communication system, the method comprising: receiving, from a base station, configuration information on a layer 1/layer 2 (L1/L2) triggered mobility (LTM) including an execution condition for an LTM cell switch; and performing an evaluation for the execution condition of the LTM cell switch based on the configuration information, after the LTM cell switch.
  2. 2 . The method of claim 1 , wherein the execution condition for the LTM cell switch includes a first execution condition associated with a serving cell and a second execution condition for at least one LTM candidate.
  3. 3 . The method of claim 2 , wherein the configuration information on the LTM further includes information for configuring the at least one LTM candidate.
  4. 4 . The method of claim 2 , wherein the configuration information is associated with an identifier (ID) of the at least one LTM candidate.
  5. 5 . The method of claim 2 , wherein the first execution condition is for an initial LTM cell switch of the serving cell, and wherein the second execution condition is for a subsequent LTM cell switch of the at least one LTM candidate.
  6. 6 . A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a user equipment (UE), configuration information on a layer 1/layer 2 (L1/L2) triggered mobility (LTM) including an execution condition for an LTM cell switch, wherein an evaluation for the execution condition of the LTM cell switch is based on the configuration information, after the LTM cell switch.
  7. 7 . The method of claim 6 , wherein the execution condition for the LTM cell switch includes a first execution condition associated with a serving cell and a second execution condition for at least one LTM candidate.
  8. 8 . The method of claim 7 , wherein the configuration information on the LTM further includes information for configuring the at least one LTM candidate.
  9. 9 . The method of claim 7 , wherein the configuration information is associated with an identifier (ID) of the at least one LTM candidate.
  10. 10 . The method of claim 7 , wherein the first execution condition is for an initial LTM cell switch of the serving cell, and wherein the second execution condition is for a subsequent LTM cell switch of the at least one LTM candidate.
  11. 11 . A user equipment (UE) comprising: at least one transceiver; at least one processor communicatively coupled to the at least one transceiver; and at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the UE to: receive, from a base station, configuration information on a layer 1/layer 2 (L1/L2) triggered mobility (LTM) including an execution condition for an LTM cell switch, and perform an evaluation for the execution condition of the LTM cell switch based on the configuration information, after the LTM cell switch.
  12. 12 . The UE of claim 11 , wherein the execution condition for the LTM cell switch includes a first execution condition associated with a serving cell and a second execution condition for at least one LTM candidate.
  13. 13 . The UE of claim 12 , wherein the configuration information on the LTM further includes information for configuring the at least one LTM candidate.
  14. 14 . The UE of claim 12 , wherein the configuration information is associated with an identifier (ID) of the at least one LTM candidate.
  15. 15 . The UE of claim 12 , wherein the first execution condition is for an initial LTM cell switch of the serving cell, and wherein the second execution condition is for a subsequent LTM cell switch of the at least one LTM candidate.
  16. 16 . A base station comprising: at least one transceiver; at least one processor communicatively coupled to the at least one transceiver; and at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the base station to: transmit, to a user equipment (UE), configuration information on a layer 1/layer 2 (L1/L2) triggered mobility (LTM) including an execution condition for an LTM cell switch, wherein an evaluation for the execution condition of the LTM cell switch is based on the configuration information, after the LTM cell switch.
  17. 17 . The base station of claim 16 , wherein the execution condition for the LTM cell switch includes a first execution condition associated with a serving cell and a second execution condition for at least one LTM candidate.
  18. 18 . The base station of claim 17 , wherein the configuration information on the LTM further includes information for configuring the at least one LTM candidate.
  19. 19 . The base station of claim 17 , wherein the configuration information is associated with an identifier (ID) of the at least one LTM candidate.
  20. 20 . The base station of claim 17 , wherein the first execution condition is for an initial LTM cell switch of the serving cell, and wherein the second execution condition is for a subsequent LTM cell switch of the at least one LTM candidate.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is based on and claims priority under 35 U.S.C. 119 to Korean Patent Application No. 10-2024-0156335, which was filed in the Korean Intellectual Property Office on Nov. 6, 2024, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. FIELD The disclosure relates generally to an operation of a user equipment (UE) in a wireless (or mobile) communication system, and more specifically, to the use of a condition and a non-condition during mobility of a UE. 2. DESCRIPTION OF RELATED 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 (THz) 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 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 not only new waveforms for providing coverage in terahertz bands of 6G mobile communication