Method and system for initiating cell transition activities during multicast and broadcast services

Patent metadata

Field	Value
Publication number	US-12526697-B2
Application number	US-202318297147-A
Country	US
Kind code	B2
Filing date	Apr 7, 2023
Priority date	Aug 12, 2022
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A method and/or system for initiating one of a plurality of cell transition activities for a UE supporting multicast and broadcast services (MBS). The technique may include identifying, by the UE, one or more candidate cells available for one of the plurality of cell transition activities for the UE. The technique may include identifying, by the UE, at least one candidate cell among the one or more candidate cells that support MBS. The technique may include initiating, by the UE, one of the plurality of cell transition activities for the UE using the at least one candidate cell.

First claim

What is claimed is:

1 . A method for initiating a cell transition activity, of a plurality of cell transition activities, for a user equipment (UE) supporting multicast and broadcast services (MBS), the method comprising:
identifying, by the UE, one or more candidate cells available for the cell transition activity of the plurality of cell transition activities for the UE; identifying, by the UE, at least one candidate cell among the one or more candidate cells based on detecting a system information (SI) scheduling information for system information block 20 (SIB20) or a system information block 21 (SIB21) in a system information block 1 (SIB1) received from the one or more candidate cells, wherein the at least one candidate cell supports MBS; and initiating, by the UE, a cell transition activity of the plurality of cell transition activities for the UE using the at least one candidate cell.

2 . The method as claimed in claim 1 , wherein the plurality of cell selection cell transition activities include cell selection, cell reselection, cell redirection, handover, and inter-radio access technology (IRAT) handover.

3 . The method as claimed in claim 1 , wherein prior to initiating the cell transition activity of the plurality of cell transition activities, the method comprises:
determining if the at least one candidate cell satisfies an event criterion associated with the cell transition activity of the plurality of cell transition activities; and
identifying another candidate cell among the one or more candidate cells that supports MBS, if the at least one candidate cell does not satisfy the event criterion.

4 . The method as claimed in claim 1 , wherein initiating the cell transition activity of the plurality of cell transition activities for the UE comprises camping on the at least one candidate cell, when the cell transition activity of the plurality of cell transition activities comprises a cell selection and/or a cell redirection.

5 . The method as claimed in claim 1 , wherein initiating the cell transition activity of the plurality of cell transition activities comprises reselecting to the at least one candidate cell, when the cell transition activity of the plurality of cell transition activities comprises a cell reselection.

6 . The method as claimed in claim 1 , wherein identifying the one or more candidate cells comprises identifying the one or more candidate cells from a list of neighbor cells provided by a network, when the cell transition activity of the plurality of cell transition activities is measurement reporting for a handover and/or an IRAT handover.

7 . The method as claimed in claim 1 , wherein initiating the cell transition activity of the plurality of cell transition activities comprises prioritizing performing of measurement for the at least one candidate cell, when the cell transition activity of the plurality of cell transition activities comprises a handover and/or an IRAT handover.

8 . The method as claimed in claim 1 , further comprising:
determining at least a first candidate cell and a second candidate cell among the one or more candidate cells for the cell transition activity of the plurality of cell transition activities for the UE, wherein the first candidate cell supports MBS, and the second candidate cell does not support MBS; determining a difference between a signal strength of the first candidate cell and the second candidate cell; and initiating the cell transition activity of the plurality of cell transition activities using the second candidate cell, when the difference is below a predetermined threshold.

9 . The method as claimed in claim 1 , further comprising:
determining at least a first candidate cell and a second candidate cell among the one or more candidate cells, wherein each of the first candidate cell and the second candidate cell support MBS; determining whether one of the first candidate cell and the second candidate cell supports a relaxed measurement feature; and initiating the cell transition activity of the plurality of cell transition activities using one of the first candidate cell and the second candidate cell supporting the relaxed measurement feature.

10 . A user equipment (UE) for initiating a cell transition activity of a plurality of cell transition activities for the UE supporting multicast and broadcast services (MBS), the UE comprising:
memory storing instructions; and at least one processor coupled to the memory,
wherein the instructions, when executed by the at least one processor cause the UE to: identify one or more candidate cells available for the cell transition activity of the plurality of cell transition activities for the UE;
identify at least one candidate cell among the one or more candidate cells based on detecting a system information (SI) scheduling information for system information block 20 (SIB20) or a system information block 21 (SIB21) in a system information block 1 (SIB1) received from the one or more candidate cells, wherein the at least one candidate cell supports MBS and the SI scheduling information; and
initiate the cell transition activity of the plurality of cell transition activities for the UE using the at least one candidate cell.

11 . The UE as claimed in claim 10 , wherein the plurality of cell selection activities include cell selection, cell reselection, cell redirection, handover, and Inter-Radio Access Technology (IRAT) handover.

12 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to:
determine if the at least one candidate cell satisfies an event criterion associated with the cell transition activity of the plurality of cell transition activities; and
identify another candidate cell among the one or more candidate cells that supports MBS, if the at least one candidate cell does not satisfy the event criterion.

13 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to camp on the at least one candidate cell for initiating the cell transition activity of the plurality of cell transition activities for the UE, when the cell transition activity of the plurality of cell transition activities is one of a cell selection and a cell redirection.

14 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to reselect to the at least one candidate cell for initiating the cell transition activity of the plurality of cell transition activities, when the cell transition activity of the plurality of cell transition activities is a cell reselection.

15 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to identify one or more candidate cells from a list of neighbor cells provided by a network, when the cell transition activity of the plurality of cell transition activities is measurement reporting for a handover and/or an IRAT handover.

16 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to prioritize performing of measurement for the at least one candidate cell for initiating the cell transition activity of the plurality of cell transition activities, when the cell transition activity of the plurality of cell transition activities is a handover and/or an IRAT handover.

17 . The UE as claimed in claim 10 , wherein the instructions, when executed by the at least one processor cause the UE to:
determ

Assignees

• Samsung Electronics Co Ltd

Inventors

• Nishant
• Jain Sidhant
• K Gokul
• JHA Kailash Kumar
• Umair Mohammad

Classifications

• H04W36/00835

  Determination of neighbour cell lists · CPC title

• H04W36/08

  Reselecting an access point · CPC title

• H04W4/06

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04W48/20

  Selecting an access point · CPC title

• H04W36/14

  Reselecting a network or an air interface · CPC title