MBS Session Status Reporting via AT Commands in User Equipment

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Solution Overview

Problem

Existing wireless communication systems lack effective methods for managing and updating the status of multicast and broadcast service (MBS) sessions, particularly in supporting new features associated with user equipment (UE) utilizing MBS.

Innovation Solution

The implementation of AT commands between the application processor (AP) and modem of a UE to manage MBS PDU sessions, including the use of set and unsolicited AT commands for MBS session status reporting, enabling the UE to configure and receive updates on MBS session status through physical and software interfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional techniques for communicating or updating status of a PDU session are used, then the system maintains simplicity, but it cannot support new features associated with UE utilizing MBS

Engineering Contradiction:

Improvesupport for new MBS featuresVSAvoidstatus update mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces dynamic status reporting mechanisms where the UE can configure reporting behavior through AT commands. The system transitions from static PDU session status to dynamic MBS session status that can be updated in real-time based on network conditions and UE requirements, enabling support for new MBS features while maintaining manageable complexity through configurable parameters.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces AT commands as an intermediary interface between the UE application layer and the modem/MBS management layer. This intermediary mechanism allows flexible configuration and control of MBS session status reporting without requiring fundamental changes to the core PDU session architecture, thus supporting new features while preserving system simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the UE continuously monitors and reports MBS session status, then the network receives timely updates, but the UE consumes additional processing resources and energy

Engineering Contradiction:

Improvestatus update timelinessVSAvoidUE processing energy

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic status reporting where the UE transmits MBS session status updates at configured intervals or triggered by specific events. Instead of continuous monitoring, the system uses periodic action with configurable periods and event-driven triggers, reducing UE processing energy while maintaining reliable status information delivery to the network.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent enables the UE to self-manage its MBS session status reporting by allowing it to configure reporting parameters through AT commands. The UE autonomously decides when to report status based on network conditions and application requirements, eliminating the need for network-side continuous polling and reducing overall system energy consumption while maintaining timeliness.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If the UE configures detailed MBS session status settings through AT commands, then the control flexibility is improved, but the command interface complexity increases

Engineering Contradiction:

ImproveMBS session control flexibilityVSAvoidAT command interface

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent designs AT commands with multi-functionality, where a single command structure can configure various MBS session status parameters including reporting enablement, update intervals, and trigger conditions. This universal command interface provides detailed control flexibility without proportionally increasing complexity, as the same command framework handles multiple configuration scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260059610A1Status update for multicast and broadcast service (MBS)

Publication Date: 2026.02.26 GOOGLE LLC

AI summary

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for an application processor (AP) 160 of a user equipment (EU) 150 to communicate with a modem 170 of the UE 150 to set and update a status for a multicast and broadcast service (MBS). The AP 160 can send 109 a first attention (AT) command including an MBS session status setting that controls MBS session status reporting for the MBS session. The modem 170 can send 127 a second AT command that includes an MBS session status report. The second AT command can be an unsolicited AT command. The modem 170 can send 127 the second AT command when it detects a change in one or more parameters of the MBS session. The one or more parameters of the MBS session status report can include an MBS decision and an MBS reject cause.