Granted Patent B2

US 12,733,046 · App. 18/496,369 · Granted Sep 8, 2026

Inventors: Duc Doan Nguyen (Bac Ninh, VN); Van Hung Nguyen (Bac Ninh, VN); Minh Duc Hoang (Bac Ninh, VN); The Thoi Nguyen (Bac Ninh, VN); Van Thinh Nguyen (Bac Ninh, VN); Van Hau Truong (Bac Ninh, VN)

Assignee: Samsung Electronics Co., Ltd.

H04W76/10

Abstract

Claims (69)

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

executing a first application of the UE;

identifying a UE route selection policy (URSP) rule mapped with the first application, based on configuration information on the first application;

identifying a first single-network slice selection assistance information (S-NSSAI) mapped with the first application, based on the URSP rule mapped with the first application, wherein the first S-NSSAI is not registered for the UE;

in case that a number of S-NSSAIs registered for the UE corresponds to a maximum number, identifying a second S-NSSAI mapped with a second application having a lowest priority among the S-NSSAIs registered for the UE; and

transmitting, to a core network via a base station, a message for requesting registration of the first S-NSSAI mapped with the first application,

wherein the message includes an S-NSSAI list including the first S-NSSAI in replacement of the second S-NSSAI registered for the UE.

2 . The method of claim 1 ,

wherein the identifying of the URSP rule mapped with the first application comprises identifying the URSP rule including a traffic descriptor (TD) mapped with the first application among a plurality of URSP rules, based on the configuration information on the first application, and

wherein each of the plurality of URSP rules corresponds to a non-default URSP rule.

3 . The method of claim 2 , wherein the identifying of the first S-NSSAI mapped with the first application comprises:

identifying a route selection descriptor (RSD) of the URSP rule including the TD mapped with the first application;

determining whether a protocol data unit (PDU) session mapped with the identified RSD exists among a plurality of PDU sessions in which connections are established; and

in case that the PDU session mapped with identified RSD does not exist among the plurality of PDU sessions, identifying the first S-NSSAI mapped with the first application.

4 . The method of claim 1 , further comprising:

receiving, from the base station, a message for notifying that the registration of the first S-NSSAI mapped with the first application has been allowed; and

establishing a protocol data unit (PDU) session associated with the first application, based on the first S-NSSAI that has been allowed to be registered.

5 . The method of claim 1 , further comprising:

receiving, from the base station, a message for notifying that the registration of the first S-NSSAI mapped with the first application has not been allowed; and

establishing a protocol data unit (PDU) session associated with the first application by using a pre-configured default URSP rule.

6 . The method of claim 5 ,

wherein the pre-configured default URSP rule comprises at least one parameter applicable commonly to a plurality of applications executed in the UE, and

wherein the establishing of the PDU session associated with the first application by using the pre-configured default URSP rule comprises establishing the PDU session associated with the first application by applying the at least one parameter.

7 . The method of claim 1 , further comprising:

transmitting, to the core network via the base station, a message for requesting registration for S-NSSAIs included in a first list before transmitting the message including the S-NSSAI list including the first S-NSSAI; and

receiving, from the base station, a message indicating that registration of at least some S-NSSAIs among the S-NSSAIs included in the first list is allowed,

wherein the first S-NSSAI mapped with the first application is not included in the first list.

8 . The method of claim 7 , further comprising:

generating a second list corresponding to the S-NSSAI list including the first S-NSSAI mapped to the first application;

transmitting, to the core network via the base station, a message for requesting registration for S-NSSAIs included in the second list; and

establishing a protocol data unit (PDU) session associated with the first application according to allowance of registration of the first S-NSSAI.

9 . The method of claim 8 , wherein the second list comprises the first S-NSSAI and the at least some S-NSSAIs.

10 . The method of claim 8 , wherein the second list comprises the first S-NSSAI and S-NSSAIs related to connected PDU sessions among the S-NSSAIs included in the first list.

11 . The method of claim 1 , further comprising:

determining whether an S-NSSAI of a route selection descriptor (RSD) included in the URSP rule is included in S-NSSAIs allowed by the core network to be registered.

12 . The method of claim 1 , further comprising:

determining whether the number of the S-NSSAIs registered for the UE corresponds to the maximum number;

in case that the number of the S-NSSAIs corresponds to the maximum number, determining whether an S-NSSAI associated with a protocol data unit (PDU) session that has not been connected exists among the S-NSSAIs registered for the UE; and

transmitting, to the core network via the base station, the message for requesting the registration of the first S-NSSAI mapped with the first application in replacement of the S-NSSAI associated with the PDU session that has not been connected.

13 . The method of claim 12 , further comprising:

in case that the number of the S-NSSAIs is less than the maximum number, transmitting, to the base station, the message for requesting the registration of the first S-NSSAI mapped with the first application in replacement of an S-NSSAI which is not allowed to be registered among S-NSSAIs for which the core network has been requested to allow registration.

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

a transceiver;

at least one processor; and

memory storing instructions, when executed by the at least one processor, that cause the UE to:

execute a first application of the UE,

identify a UE route selection (URSP) rule mapped with the first application, based on configuration information on the first application,

identify a first single-network slice selection assistance information (S-NSSAI) mapped with the first application, based on the URSP rule mapped with the first application, wherein the first S-NSSAI is not registered for the UE,

in case that a number of S-NSSAIs registered for the UE corresponds to a maximum number, identify a second S-NSSAI mapped with a second application having a lowest priority among the S-NSSAIs registered for the UE, and

transmit, to a core network via a base station, a message for requesting registration of the first S-NSSAI mapped with the first application,

wherein the message includes an S-NSSAI list including the first S-NSSAI in replacement of the second S-NSSAI registered for the UE.

15 . The UE of claim 14 ,

wherein the instructions further cause the UE to:

identify the URSP rule including a traffic descriptor (TD) mapped to the with the first application among a plurality of URSP rules, based on the configuration information on the first application, and

wherein each of the plurality of URSP rules corresponds to a non-default URSP rule.

16 . The UE of claim 15 , wherein the instructions further cause the UE to:

identify a route selection descriptor (RSD) of the URSP rule including the TD mapped with the first application,

determine whether a protocol data unit (PDU) session mapped with the identified RSD exists among a plurality of PDU sessions in which connections are established, and

in case that the PDU session mapped with the identified RSD does not exist among the plurality of PDU sessions, identify the first S-NSSAI mapped with the first application.

17 . The UE of claim 14 , wherein the instructions further cause the UE to:

receive, from the base station, a message for notifying that the registration of the first S-NSSAI mapped with the first application has been allowed, and

establish a protocol data unit (PDU) session associated with the first application, based on the first S-NSSAI that has been allowed to be registered.

18 . The UE of claim 14 , wherein the instructions further cause the UE to:

receive, from the base station, a message for notifying that the registration of the first S-NSSAI mapped with the first application has not been allowed, and

establish a protocol data unit (PDU) session associated with the first application by using a pre-configured default URSP rule.

19 . The UE of claim 18 ,

wherein the pre-configured default URSP rule comprises at least one parameter applicable commonly to a plurality of applications executed in the UE and

wherein the instructions further cause the UE to:

establish the PDU session associated with the first application by applying the at least one parameter.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (18)