Sidelink DRX Wake-Up Indication for Power Management
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Solution Overview
Problem
Current wireless communication systems, particularly in sidelink communications, face challenges in power consumption due to the need for continuous monitoring of sidelink control information, which is inefficient and consumes high power, especially for battery-powered devices like pedestrian UEs and those used in public safety services.
Innovation Solution
The implementation of sidelink discontinuous reception (SL DRX) configurations that allow UEs to determine and manage wake-up indications, enabling them to wake up only during specific phases for communication, thereby reducing power consumption by monitoring wake-up indications within a sidelink bandwidth part and ignoring them when not necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring of sidelink control information is implemented, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) with periodic wake-up indications, where UEs monitor wake-up indications only during specific DRX on-phases rather than continuously. This periodic monitoring approach maintains communication reliability by ensuring UEs check for incoming data at regular intervals while significantly reducing power consumption compared to continuous monitoring.
2Use of energy by moving object
If discontinuous reception (DRX) is implemented, then power consumption is reduced, but communication responsiveness may deteriorate
Solution Approach 1:
The patent uses wake-up indications transmitted before the actual data transmission to preliminarily alert UEs about incoming communications. This allows UEs to wake up only when necessary, maintaining communication responsiveness by ensuring they are awake and ready to receive data before it arrives, while still benefiting from reduced power consumption during idle periods.
3Use of energy by moving object
If wake-up indication monitoring is implemented during DRX, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent enables UEs to autonomously manage their DRX cycles and wake-up indication monitoring based on pre-configured parameters. Each UE independently determines when to wake up and monitor for wake-up indications without requiring complex network coordination or control, thereby reducing overall system complexity while achieving power savings.
Data Source
AI summary
Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes determining one or more sidelink discontinuous reception (DRX) configurations associated with at least a communication on a sidelink, determining a wake up indication configuration associated with the one or more sidelink DRX configurations, monitoring for at least one wake up indication from at least one other UE based on the wake up indication configuration, the at least one wake up indication indicating a sidelink DRX on phase associated with the sidelink DRX configuration, deciding an action for the sidelink DRX on phase based on the at least one wake up indication for the at least one communication on the sidelink, and performing the action in accordance with the decision.