IP Library › Granted Patent US 12684423
Granted Patent B2
US 12684423 · App. 18/303,820 · Granted Jul 14, 2026

Communication control method

Inventors: Masato Fujishiro (Yokohama, JP); Henry Chang (San Diego, CA)
Assignee: KYOCERA Corporation
H04W36/0007
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Quick Facts
Patent No.
US 12684423
App. No.
18/303,820
Granted
Jul 14, 2026
Kind
B2
Abstract

A communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to user equipment, and includes receiving, by the base station from a core network or another base station, a specific Packet Data Convergence Protocol (PDCP) sequence number specified to be applied to an MBS packet; associating, by the base station, the MBS packet with the specific PDCP sequence number; and transmitting, by the base station to the user equipment, the MBS packet associated with the specific PDCP sequence number.

Claims (13)

1 . A communication control method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to user equipment, the communication control method comprising:

receiving, by the user equipment from a cell, MBS control information used to receive MBS data;

configuring the user equipment with the MBS control information so that the user equipment receives an MBS multicast session in an RRC inactive state;

performing, by the user equipment in an RRC (Radio Resource Control) inactive state, cell reselection to another cell; and

determining, by the user equipment, whether the MBS control information received from the cell is available in the another cell, wherein

the user equipment in the RRC inactive state is configured to transition to an RRC connected state in the another cell in response to determining that the MBS control information received from the cell is not available in the another cell.

2 . A user equipment comprising:

a receiver configured to receive, from a cell, multicast broadcast service (MBS) control information used to receive MBS data; and

a processor configured to:

configure the user equipment with the MBS control information so that the user equipment receives an MBS multicast session in an RRC inactive state;

perform cell reselection to another cell while the user equipment is in an RRC (Radio Resource Control) inactive state;

determine whether the MBS control information received from the cell is available in the another cell; and

in response to determining that the MBS control information received from the cell is not available in the another cell, transition the user equipment from the RRC inactive state to an RRC connected state.