Wake-up Indication in Sidelink Control Information for DRX Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing wake-up indications for sidelink control information (SCI) in 5G/NR mobile communications, which affects power consumption and communication efficiency.
Innovation Solution
A user equipment (UE) in a wireless communication system is configured to determine sidelink (SL) discontinuous reception (DRX) configurations, DRX cycles, and active time durations. It receives a first SCI format before the active time duration and determines, based on an indication in the first SCI format, whether to receive a second SCI format during the active time duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors SCI formats to ensure reliable communication, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the UE monitor a first SCI format before the active time duration starts. This preliminary monitoring allows the UE to obtain wake-up indications in advance, enabling it to decide whether to wake up for the second SCI format reception, thus avoiding unnecessary power consumption while maintaining communication reliability
Solution Approach 2:
The patent implements periodic action through the DRX cycle mechanism, where the UE periodically monitors SCI formats at specific intervals (reception occasions) rather than continuously. This periodic monitoring combined with the wake-up indication mechanism allows the UE to balance between power saving and reliable communication by only activating reception functions when necessary
2Use of energy by moving object
If the UE uses DRX cycle to save power by sleeping during inactive periods, then power consumption is reduced, but the UE may miss important communication signals
Solution Approach 1:
The patent uses preliminary action by monitoring the first SCI format before the active time duration to obtain wake-up indications. This allows the UE to make informed decisions about whether to wake up during the active period, ensuring it doesn't miss important signals while still benefiting from power saving during inactive DRX periods
Solution Approach 2:
The patent implements feedback through the wake-up indication mechanism in the first SCI format, which provides information about whether the UE needs to wake up for the second SCI format. This feedback loop ensures the UE reliably receives necessary communication signals while maintaining power saving benefits of DRX
3Loss of information
If the UE monitors multiple SCI formats to ensure complete information reception, then information completeness is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by monitoring the first SCI format before the active time duration to obtain wake-up indications. This preliminary information allows the UE to simplify its processing during the active period, as it already knows whether it needs to receive the second SCI format, thus reducing processing complexity while maintaining information completeness
Solution Approach 2:
The patent segments the SCI format reception process into two distinct parts: the first SCI format monitored before active time (containing wake-up indications) and the second SCI format monitored during active time (containing actual communication data). This segmentation allows the UE to handle each part with appropriate processing resources, reducing overall processing complexity while ensuring complete information reception
Data Source
AI summary
Methods and apparatuses for wake-up indication in sidelink control information (SCI) in a wireless communication system. A method of a user equipment (UE) in a wireless communication system includes receiving a set of configurations or pre-configurations, determining, based on the set of configurations or pre-configurations, at least one sidelink (SL) discontinuous reception (DRX) configuration, determining a DRX cycle based on the at least one SL DRX configuration and determining an active time duration in the DRX cycle. The method further includes determining reception occasions of a first SCI format that are before a start of the active time duration, determining whether the first SCI format is received based on the reception occasions and when the first SCI format is received in the reception occasions, determining, based on an indication in the first SCI format, whether to receive a second SCI format in the active time duration.