UE Power Reduction via MBS Timer Logic in 5G Wireless
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, User Equipment (UE) experiences significant power consumption when continuously monitoring multicast/broadcast (MBS) transmissions without receiving interested packets, leading to inefficient power usage and potential RRC state synchronization issues.
Innovation Solution
Implementing a timer-based mechanism in wireless communication nodes to determine whether to initialize a timer based on the presence of MBS packets, allowing the UE to reduce power consumption by indicating when no interested packets have been received for a long period, thereby optimizing power usage and avoiding RRC state misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors MBS transmissions to ensure reliable reception, then the reliability of MBS packet reception is improved, but the power consumption of the UE increases significantly
Solution Approach 1:
The patent applies periodic action by implementing a timer mechanism that periodically checks whether the UE has received interested MBS packets. Instead of continuous monitoring, the UE activates monitoring only when the timer indicates packets are due, thereby reducing power consumption while maintaining reception reliability through scheduled periodic checks.
2Use of energy by moving object
If the UE reduces monitoring activity to save power, then the power consumption is reduced, but the RRC state synchronization between UE and network may be lost
Solution Approach 1:
The patent implements feedback by having the timer mechanism provide information to the upper layers about MBS packet reception status. When the timer expires or detects missed packets, it triggers appropriate actions to maintain RRC state synchronization, ensuring the network and UE remain aligned while still allowing reduced monitoring intervals for power savings.
3Reliability
If the UE monitors all MBS transmissions including non-interested packets, then the completeness of MBS service reception is improved, but the complexity of packet processing increases
Solution Approach 1:
The patent applies the extraction principle by separating interested MBS packets from non-interested ones through the timer mechanism. The UE extracts and processes only the relevant packets that match its subscription criteria, filtering out unnecessary packets. This reduces processing complexity while maintaining complete reception of all services the UE actually needs.
Data Source
AI summary
A method and a device used for wireless communications. A first node receives a first radio signal, and decodes the first radio signal for obtaining at least one MAC SDU, any MAC SDU of the at least one MAC SDU belonging to a target logical channel set; and determines whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set, specifically comprising: if any of the at least one MAC SDU belongs to the given logical channel set, initializing the first timer; if none of the at least one MAC SDU belongs to the given logical channel set, not initializing the first timer; herein, the first radio signal is scrambled by a non-unicast RNTI; any logical channel in the target logical channel set is used for multicast MBS. This application helps greatly reduce the UE power consumption.