Sidelink DRX Active-Time Reconfiguration for UE Power Saving
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing power consumption and efficient resource allocation for sidelink communication, particularly in next-generation mobile networks with increased data traffic and device connectivity, leading to potential inefficiencies in power usage and resource management.
Innovation Solution
A method for configuring sidelink discontinuous reception (SL DRX) that involves user equipment (UE) receiving and adjusting SL active times based on multiple DRX configurations from other UEs and base stations, allowing for dynamic re-determination of active times to optimize power consumption and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If SL DRX configuration is used to reduce power consumption, then energy efficiency improves, but device complexity increases due to multiple DRX configurations from different sources
Solution Approach 1:
The patent introduces a configuration manager as an intermediary component that receives DRX configurations from multiple sources (base station, other UEs) and processes them centrally. This mediator coordinates the conflicting configurations and determines the final SL active time, reducing the complexity burden on individual components while maintaining energy efficiency benefits
Solution Approach 2:
The system dynamically adjusts DRX configuration parameters (such as active time duration, cycle length) based on received configurations from multiple sources. By changing these parameters adaptively, the system optimizes power consumption while managing complexity through parameter optimization rather than structural complexity
2Reliability
If SL active time is extended to monitor SCI from multiple UEs, then communication reliability improves, but power consumption increases
Solution Approach 1:
The patent implements dynamic SL active time adjustment where the monitoring window is flexibly extended or reduced based on the number of active sidelink connections and traffic requirements. This dynamic approach ensures reliable communication monitoring when needed while minimizing power consumption during low-activity periods
Solution Approach 2:
The system uses periodic DRX cycles with configured active times for SCI monitoring. Instead of continuous monitoring, the UE periodically wakes up to check for sidelink control information, ensuring communication reliability through regular checks while reducing power consumption by remaining in sleep mode between periods
Data Source
AI summary
Disclosed are a method and a device for configuring sidelink discontinuous reception in a wireless communication system. A method performed by a first UE, according to one embodiment of the present disclosure, may comprise the steps of: receiving information about a first SL DRX configuration from a second UE; determining an SL active time for monitoring SCI from the second UE on the basis of the first SL DRX configuration; and re-determining the SL active time on the basis of receiving information about a second SL DRX configuration from a base station or receiving information about a third SL DRX configuration from the second UE.