Data Inactivity Timer Handling for MBS Sessions in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently handling data inactivity timers for Multicast/Broadcast Sessions (MBS) in RRC_IDLE and RRC_CONNECTED states, leading to suboptimal power management and service delivery.
Innovation Solution
A wireless device receives a configuration for a data inactivity timer and determines whether to start or restart it based on the type of MBS session, allowing it to remain in RRC_CONNECTED for multicast sessions and transition to RRC_IDLE for broadcast sessions, optimizing power usage and service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data inactivity timer is started or restarted for all MBS sessions, then service continuity is maintained, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating timer handling based on MBS session type. For multicast sessions, the data inactivity timer is started or restarted to maintain service continuity, while for broadcast sessions, the timer is not started allowing the UE to transition to idle state and save power. This localized differentiation resolves the contradiction by applying appropriate timer behavior to each session type rather than a uniform approach.
Solution Approach 2:
The patent implements dynamics by making the timer behavior adaptive to the specific MBS session characteristics. The system dynamically determines whether to start/restart the data inactivity timer based on whether the session is multicast or broadcast, allowing the UE to transition between connected and idle states appropriately. This dynamic adaptation resolves the contradiction between maintaining service continuity and reducing power consumption.
2Reliability
If the UE remains in RRC_CONNECTED state for MBS sessions, then service continuity is ensured, but power consumption increases
Solution Approach 1:
The patent applies local quality by making the RRC state decision dependent on MBS session type. For multicast sessions, the UE remains in RRC_CONNECTED state to ensure service continuity, while for broadcast sessions, the UE transitions to RRC_IDLE state to save power. This localized differentiation based on session characteristics resolves the contradiction between service continuity and power consumption.
3Use of energy by moving object
If the UE transitions to RRC_IDLE for MBS sessions, then power consumption is reduced, but service continuity may be affected
Solution Approach 1:
The patent applies local quality by differentiating RRC state transitions based on MBS session type. For broadcast sessions, the UE transitions to RRC_IDLE state to reduce power consumption, while for multicast sessions, the UE remains in RRC_CONNECTED state to maintain service continuity. This localized approach ensures that power savings are achieved without compromising service continuity for sessions that require it.
Data Source
AI summary
A method and apparatus for handling of a data inactivity timer for MBS session in a wireless communication system is provided. A wireless device may receive, from a network, a configuration of a data inactivity timer. A wireless device may receive a Medium Access Control Service Data Unit (MAC SDU) for a Multicast Traffic Channel (MTCH) for a MBS session. A wireless device may start or restart the data inactivity timer based on determining that the MBS session cannot be received in RRC_IDLE through the MTCH.