MBS Configuration Timing for Synchronized UE Application

Solution Overview

Problem

In MBS communication, the configuration change messages for user equipment (UE) may not be successfully delivered in the initial transmission, leading to delays or different transmission times among UEs, causing inconsistencies in applying the new configuration.

Innovation Solution

The base station notifies the UE of the time point to apply the MBS communication configuration, using methods such as system frame number (SFN), downlink control information (DCI), or medium access control element (MAC CE) to ensure all UEs apply the configuration simultaneously.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the base station transmits configuration change messages to UEs for MBS communication, then the configuration can be updated, but the messages may not be successfully delivered in initial transmission causing delays or different transmission times among UEs

Engineering Contradiction:

Improveconfiguration delivery reliabilityVSAvoidtransmission time difference

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The base station specifies a future time point for applying the configuration before actually applying it. This allows the base station to prepare and transmit the configuration change message in advance, then schedule its application for a specific future time point, ensuring all UEs apply the configuration simultaneously without waiting for individual message delivery completion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station receives feedback information from UEs about their configuration application status. Based on this feedback, the base station can adjust its behavior to ensure all UEs have successfully applied the configuration before proceeding to the next step, thereby ensuring reliability while minimizing time differences.

Inventive Principle:

Principle #23Feedback

2Reliability

If the base station transmits configuration change messages to UEs for MBS communication, then the configuration can be updated, but retransmission may cause delays

Engineering Contradiction:

Improveconfiguration delivery reliabilityVSAvoidconfiguration update speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The base station specifies a future time point for applying the configuration before actually applying it. This allows the base station to prepare and transmit the configuration change message in advance, then schedule its application for a specific future time point, ensuring all UEs apply the configuration simultaneously without waiting for individual message delivery completion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station receives feedback information from UEs about their configuration application status. Based on this feedback, the base station can adjust its behavior to ensure all UEs have successfully applied the configuration before proceeding to the next step, thereby ensuring reliability while minimizing time differences.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If different configuration messages are transmitted to individual UEs for MBS communication, then each UE can receive tailored configuration, but transmission time differences occur among UEs

Engineering Contradiction:

Improveconfiguration customizationVSAvoidtransmission time difference

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The base station specifies a future time point for applying the configuration before actually applying it. This allows the base station to prepare and transmit the configuration change message in advance, then schedule its application for a specific future time point, ensuring all UEs apply the configuration simultaneously without waiting for individual message delivery completion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station receives feedback information from UEs about their configuration application status. Based on this feedback, the base station can adjust its behavior to ensure all UEs have successfully applied the configuration before proceeding to the next step, thereby ensuring reliability while minimizing time differences.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4102929B1Methods and devices for time point for starting MBS configuration

Publication Date: 2025.11.26 SAMSUNG ELECTRONICS CO LTD

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AI summary

The present disclosure relates to a communication technique which combines, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The present invention provides a method and device for a base station to notify a terminal of a time point for applying a configuration for MBS communication.