# US 12,010,593 B2 · Method and system for MBS switching and continuity in 5G wireless network

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- Number: US 12,010,593 B2
- Document ID: US12010593B2
- Status: Granted
- Kind: B2
- Application number: 18/352,895
- Filed: 2023-07-14
- Published: 2023-11-09
- Granted: 2024-06-11
- Earliest claimed: 2020-08-06
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Vinay Kumar Shrivastava; Neha Agarwal; Rohan Raj; Arun Raj Rajendran; Avijit Manna; Fasil Abdul Latheef
- Web page: https://patentgrep.com/patent/US12010593B2

## CPC

- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04L 1/0025: {Transmission of mode-switching indication}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority}
- H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands}
- H04W 72/121: for groups of terminals or users
- H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W 72/30: Resource management for broadcast services
- H04W 80/02: Data link layer protocols
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Embodiments herein disclose a method for MBS switching and continuity in a 5G wireless network. The method includes establishing, by a gNodeB, a MBS session with a UE. Further, the method includes providing, by the gNodeB, MBS to the UE during the MBS session. Further, the method includes detecting, by the gNodeB, that the at least one MBS is going to get suspended or deactivated. Further, the method includes sending, by the gNodeB, an indication to the UE indicating the at least one MBS going to get suspended or deactivated prior to suspension or deactivation of the at least one MBS at the UE.

## Claims

### Claim 1

A user equipment (UE) for Multicast and Broadcast Service (MBS) switching and continuity in a 5th Generation (5G) wireless network, wherein the user equipment (UE) comprises:
a memory; a processor; and a MBS switching and continuity controller, communicatively coupled to the memory and the processor configured to:
establish a MBS session with a gNodeB;
receive the at least one MBS from the gNodeB during the MBS session using a first delivery mode;
receive an indication from the gNode indicating that the at least one MBS going to get suspended or deactivated, based on signal strength and channel quality reaching a configured threshold, prior to suspension or deactivation of the at least one MBS at the UE; and
switch from the first delivery mode to a second delivery mode to continue reception of the at least one MBS based on a Media Access Control (MAC) control element (CE) prior to suspension or deactivation of the at least one MBS at the UE,
wherein signal strength and channel quality are measured on a Physical Downlink Shared Channel (PDSCH) carrying MBS, and
wherein the channel quality is determined by a channel quality indicator (CQI) parameter that is periodically measured by the UE and provided by the UE to the 5G wireless network.

### Claim 2 (depends on 1)

The UE as claimed in claim 1, wherein the MAC CE comprises at least one of a Group Radio Network Temporary Identifier (G-RNTI) or a Group-Configured Scheduling-Radio Network Identifier (G-CS-RNTI), a Logical Channel ID (LCID) information, identifier of the MBS session and a Temporary Mobile Group Identifier (TMGI).

### Claim 3 (depends on 1)

The UE as claimed in claim 1, wherein the indication is at least one of a MAC control element (CE), a Radio Resource Control (RRC) signaling, and a Downlink control information (DCI).

### Claim 4 (depends on 1)

The UE as claimed in claim 1, wherein switch from the first delivery mode to the second delivery mode to continue reception of the at least one MBS based on the MAC CE comprises:
receive a Radio Resource Control (RRC) connection reconfiguration message comprising a bearer configuration for the second delivery mode from the gNodeB;
switch from the first delivery mode to the second delivery mode by duplicating reception in the first delivery mode and the second delivery mode for a time period or a timer based on the bearer configuration; and
send a RRC reconfiguration complete message to the gNodeB.

### Claim 5 (depends on 4)

The UE as claimed in claim 4, wherein the bearer configuration is one of a point-to-point (PTP) bearer configuration, a point-to-multipoint (PTM) bearer configuration, and a split MBS bearer configuration.

### Claim 6 (depends on 4)

The UE as claimed in claim 4, wherein the time period or the timer is configured by the gNodeB, or wherein the time period or the timer is locally set by the UE.