Method and device for slice-based cell reselection using paging message in wireless communication system

Patent metadata

Field	Value
Publication number	US-2026040158-A1
Application number	US-202318996509-A
Country	US
Kind code	A1
Filing date	Jul 20, 2023
Priority date	Jul 22, 2022
Publication date	Feb 5, 2026
Grant date	—

Abstract

The disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate. The disclosure relates to a method and device by which a user equipment (UE) performs cell reselection based on slice information. A UE according to an embodiment of the disclosure may receive a paging message including slice information from a base station. The UE may perform cell reselection based on the slice information and may perform a random access procedure based on a result of the cell reselection.

First claim

1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a paging message comprising slice information from a base station; performing cell reselection based on the slice information; and performing a random access procedure based on a result of the cell reselection.

2 . The method of claim 1 , further comprising transmitting a message comprising UE capability information to the base station,
wherein the UE capability information indicates whether the cell reselection is performable based on the slice information.

3 . The method of claim 1 , wherein the performing of the cell reselection comprises:
setting frequencies supporting the slice information as highest priority frequencies; and performing the cell reselection based on the highest priority frequencies.

4 . The method of claim 1 , wherein the performing of the cell reselection comprises:
setting a slice included in the slice information as a highest priority network slice access stratum group (NSAG); and performing the cell reselection based on the highest priority NSAG.

5 . The method of claim 1 , wherein the performing of the random access procedure further comprises, when a cell supporting the slice information is not reselected until a timer expires, performing the random access procedure on a current serving cell.

6 . The method of claim 1 , wherein
the paging message comprises a paging record comprising the slice information, and the slice information comprises information related to an NSAG.

7 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting a paging message comprising slice information to a user equipment (UE); and performing a random access procedure based on a result of cell reselection based on the slice information.

8 . The method of claim 7 , further comprising receiving a message comprising UE capability information from the UE,
wherein the UE capability information indicates whether the cell reselection is performable based on the slice information.

9 . The method of claim 7 , wherein the performing of the random access procedure comprises performing the random access procedure on a cell reselected by setting frequencies supporting the slice information as highest priority frequencies.

10 . The method of claim 7 , wherein the performing of the random access procedure comprises performing the random access procedure on a cell reselected by setting a slice included in the slice information as a highest priority network slice access stratum group (NSAG).

11 . The method of claim 7 , wherein the performing of the random access procedure further comprises, when a cell supporting the slice information is not reselected until a timer expires, performing the random access procedure on a current serving cell.

12 . The method of claim 7 , wherein
the paging message comprises a paging record comprising the slice information, and the slice information comprises information related to an NSAG.

13 . A user equipment (UE) for performing communication in a wireless communication system, the UE comprising:
a transceiver; and at least one processor connected to the transceiver and configured to receive a paging message comprising slice information from a base station, perform cell reselection based on the slice information, and perform a random access procedure based on a result of the cell reselection.

14 . The UE of claim 13 , wherein the at least one processor is further configured to transmit a message comprising UE capability information to the base station,
wherein the UE capability information indicates whether the cell reselection is performable based on the slice information.

15 . A base station for performing communication in a wireless communication system, the base station comprising:
a transceiver; and at least one processor connected to the transceiver and configured to transmit a paging message comprising slice information to a user equipment (UE), and perform a random access procedure based on a result of cell reselection based on the slice information.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jung Sangyeob
• Agiwal Anil
• Kang Hyunjeong

Classifications

• H04W36/249

  according to timing information · CPC title

• H04W36/08 Primary

  Reselecting an access point · CPC title

• H04W36/0061 Primary

  of neighbour cell information · CPC title

• H04W36/00

  Hand-off or reselection arrangements · CPC title

• H04W8/24

  Transfer of terminal data · CPC title