Granted Patent B2

US 12,507,134 · App. 17/880,030 · Granted Dec 23, 2025

Inventors: Sangyeob Jung (Suwon-si, KR); Hyunjeong Kang (Suwon-si, KR)

Assignee: Samsung Electronics Co., Ltd.

H04W36/0061H04W76/30

Abstract

Claims (52)

1 . A method performed by a user equipment (UE) in a wireless communication system, comprising:

receiving, from a base station (BS), first system information including a first slice specific cell reselection priority information;

receiving, from the BS, a second system information including a first frequency specific cell reselection priority information;

transmitting, to the BS, a radio resource control (RRC) setup request message;

receiving, from the BS, a RRC setup message;

transmitting, to the BS, a RRC setup complete message including a slice list information for a network slice selection;

receiving, from the BS, a RRC release message including information on cell reselection, wherein the information on cell reselection includes a second slice specific cell reselection priority information and a second frequency specific cell reselection priority information;

storing the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information;

in case that a value of a timer associated with the cell reselection is included in the RRC release message, starting the timer, performing the cell reselection based on the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information while the timer is running; and

in case that the timer is expired, discarding the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information and applying the first slice specific priority information and first frequency specific cell reselection priority information for performing the cell reselection.

2 . The method of claim 1 ,

wherein the second system information is one of system information 2 , system information 4 , and system information 5 .

3 . A method performed by a base station (BS) in a wireless communication system, comprising:

transmitting, to a user equipment (UE), first system information including a first slice specific cell reselection priority information;

transmitting, to the UE, a second system information including a first frequency specific cell reselection priority information;

receiving. from the UE, a radio resource control (RRC) setup request message;

transmitting, to the UE, a RRC setup message;

receiving, from the UE, a RRC setup complete message including a slice list information for a network slice selection; and

transmitting, to the UE, a radio resource control (RRC) RRC release message including information on cell reselection,

wherein the information on cell reselection includes a second slice specific cell reselection priority and a value of a timer associated with the cell reselection and a second frequency specific cell reselection priority information,

wherein the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information are applied for a cell reselection procedure while the timer is running, and

wherein the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information are discarded and the first slice specific cell reselection priority information and first frequency specific cell reselection priority information are applied for performing cell reselection in case that the timer is expired.

4 . The method of claim 3 ,

wherein the second system information is one of system information 2 , system information 4 , and system information 5 .

5 . A user equipment (UE) in a wireless communication system, comprising:

a transceiver; and

at least one processor coupled to the transceiver, wherein the at least one processor is configured to:

receive, from a base station (BS), first system information including a first slice specific cell reselection priority information,

receive, from the BS, a second system information including a first frequency specific cell reselection priority information,

transmit, to the BS, a radio resource control (RRC) setup request message,

receive, from the BS, a RRC setup message,

transmit, to the BS, a RRC setup complete message including a slice list information for a network slice selection,

receive, from the BS, a RRC release message including information on cell reselection, wherein the information on cell reselection includes a second slice specific cell reselection priority information and a second frequency specific cell reselection priority information,

store the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information,

in case that a value of a timer associated with the cell reselection is included in the RRC release message, start the timer, perform the cell reselection based on the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information while the timer is running, and

in case that the timer is expired, discard the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information and apply the first slice specific priority information and first frequency specific cell reselection priority information for performing the cell reselection.

6 . The UE of claim 5 ,

wherein the second system information is one of system information 2 , system information 4 , and system information 5 .

7 . A base station (BS) in a wireless communication system, comprising:

a transceiver; and

at least one processor coupled to the transceiver, wherein the at least one processor is configured to:

transmit, to a user equipment (UE), first system information including a first slice specific cell reselection priority,

transmit, to the UE, a second system information including a first frequency specific cell reselection priority information,

receive, from the UE, a radio resource control (RRC) setup request message,

transmit, to the UE, a RRC setup message,

receive, from the UE, a RRC setup complete message including a slice list information for a network slice selection, and

transmit, to the UE, a RRC release message including information on cell reselection,

wherein the information on cell reselection includes a second slice specific cell reselection priority and a value of a timer associated with the cell reselection and a second frequency specific cell reselection priority information,

wherein the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information are applied for a cell reselection procedure while the timer is running, and

wherein the second slice specific cell reselection priority information and the second frequency specific cell reselection priority information are discarded and the first slice specific cell reselection priority information and first frequency specific cell reselection priority information are applied for performing cell reselection in case that the timer is expired.

8 . The BS of claim 7 ,

wherein the second system information is one of system information 2 , system information 4 , and system information 5 .

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (18)