MBS Session State Signaling for UE Power-Saving Channel Monitoring
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Solution Overview
Problem
In 5G networks, after a multicast service session is released, user equipment (UE) continues to monitor the data transmission channel unnecessarily, leading to power consumption.
Innovation Solution
The UE receives session state information from the access network device indicating the release state of the multicast service session, and stops monitoring the data transmission channel accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continues to monitor the data transmission channel after the MBS session is released, then the UE can receive possible reactivated data, but the UE consumes unnecessary power
Solution Approach 1:
The access network device sends session state information to the UE as feedback, indicating whether the MBS session is in release or deactivated state. Based on this feedback, the UE adjusts its monitoring behavior accordingly, stopping monitoring when the session is released while maintaining monitoring when deactivated, thus resolving the contradiction between reliability and power consumption
Solution Approach 2:
The patent introduces dynamic state management for the MBS session with three distinct states (established, deactivated, released) and corresponding monitoring behaviors. The UE dynamically adjusts its monitoring status based on real-time session state information received from the access network device, allowing flexible adaptation between reliability and power saving requirements
2Use of energy by moving object
If the access network device does not notify the UE about session release, then the UE can maintain simple monitoring, but the UE cannot save power when the session is released
Solution Approach 1:
The session state information notification mechanism serves multiple functions: it notifies the UE of session release state, provides basis for power saving decisions, and maintains session state awareness without requiring separate notification procedures. This multi-functionality reduces overall system complexity while achieving power saving goals
Solution Approach 2:
The access network device utilizes existing notification mechanisms and session state management to automatically provide session release information to the UE, without requiring additional dedicated notification procedures. The UE autonomously uses this information to adjust its monitoring behavior, achieving power saving through self-service rather than complex centralized control
Data Source
AI summary
Embodiments of the present disclosure provide a broadcast-multicast service session transmission control method and device. The broadcast-multicast service session transmission control method performed by a user equipment (UE) includes: receiving session state information of a broadcast-multicast service session, transmitted by an access network device; and stopping monitoring a data transmission channel of the broadcast-multicast service session, in case that the session state information indicates that the broadcast-multicast service session is in a release state. Thus, in the embodiments of the present disclosure, when the MBS session is in the release state, the access network device can notify the UE in the MBS session that the MBS session is in the release state, so that the UE can no longer monitor a data transmission channel of the MBS session, thereby saving the power.