Granted Patent B2

US 12,446,110 · App. 18/019,925 · Granted Oct 14, 2025

Inventors: Fasil Abdul Latheef (Calicut, IN); Vinay Kumar Srivastava (Bengaluru, IN); Sriganesh Rajendran (Chennai, IN)

Assignee: Samsung Electronics Co., Ltd.

H04W76/40H04W48/10H04W48/20

Abstract

Claims (46)

1. A method performed by a base station in a wireless communication system, the method comprising:

receiving, from an access and mobility function (AMF) entity, an N2 message associated with a request for a multicast and broadcast service (MBS) service;

transmitting, to a user equipment (UE), a message including an MBS radio bearer configuration associated with a point to multipoint (PTM) transmission mode;

transmitting, to the UE, MBS data via an MBS radio bearer with the PTM transmission mode;

transmitting, to the UE, a message including information associated with a condition related to a reception quality;

receiving, from the UE, a message related to an MBS transmission mode, based on the information associated with the condition; and

switching from the PTM transmission mode to a point to point (PTP) transmission mode and transmitting, to the UE, MBS data with the PTP transmission mode.

2. The method of claim 1 , further comprising:

receiving, from the AMF entity, an N2 message including an MBS leave indication.

3. The method of claim 1 , wherein the N2 message is received in response to a non-access stratum (NAS) message associated with the request for the MBS service.

4. A base station in a wireless communication system, the 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 to cause the base station to:

receive, from an access and mobility function (AMF) entity, an N2 message associated with a request for a multicast and broadcast service (MBS) service,

transmit, to a user equipment (UE), a message including an MBS radio bearer configuration associated with a point to multipoint (PTM) transmission mode,

transmit, to the UE, MBS data via an MBS radio bearer with the PTM transmission mode,

transmit, to the UE, a message including information associated with a condition related to a reception quality,

receive, from the UE, a message related to an MBS transmission mode, based on the information associated with the condition, and

switch from the PTM transmission mode to a point to point (PTP) transmission mode and transmit, to the UE, MBS data with the PTP transmission mode.

5. The base station of claim 4 , wherein the base station is further caused to:

receive, from the AMF entity, an N2 message including an MBS leave indication.

6. The base station of claim 4 , wherein the N2 message is received in response to a non-access stratum (NAS) message is associated with the request for the MBS service.

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

transmitting, to an access and mobility management function (AMF) entity, a non-access stratum (NAS) message associated with a request for a multicast and broadcast service (MBS) service;

receiving, from a base station, a message including an MBS radio bearer configuration associated with a point to multipoint (PTM) transmission mode;

receiving, from the base station, MBS data via an MBS radio bearer with the PTM transmission mode;

receiving, from the base station, a message including information associated with a condition related to a reception quality;

in case that the condition is fulfilled, transmitting to the base station, a message related to an MBS transmission mode; and

receiving, from the base station, MBS data with a point to point (PTP) transmission mode.

8. The method of claim 7 , further comprising:

transmitting, to the AMF entity, a NAS message associated with a request for leaving an MBS session.

9. The method of claim 7 , wherein the MBS radio bearer configuration is related to the request for the MBS service.

10. A user equipment (UE) in a wireless communication system, the 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 to cause the UE to:

transmit, to an access and mobility management function (AMF) entity, a non-access stratum (NAS) message associated with a request for a multicast and broadcast service (MBS) service,

receive, from a base station, a message including an MBS radio bearer configuration associated with a point to multipoint (PTM) transmission mode,

receive, from the base station, MBS data via an MBS radio bearer with the PTM transmission mode,

receive, from the base station, a message including information associated with a condition related to a reception quality,

in case that the condition is fulfilled, transmit to the base station, a message related to an MBS transmission mode, and

receive, from the base station, MBS data with a point to point (PTP) transmission mode.

11. The UE of claim 10 , wherein the UE is further caused to:

transmit, to the AMF entity, a NAS message associated with a request for leaving an MBS session.

12. The UE of claim 10 , wherein the MBS radio bearer configuration is related to the request for the MBS service.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (18)