UE Sidelink Channel Monitoring for Adaptive Power Saving
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Solution Overview
Problem
Existing radio communication systems face challenges in optimizing power consumption and resource allocation in sidelink channels, particularly in varying traffic conditions, leading to inefficient energy usage and potential data loss.
Innovation Solution
The method involves determining a state associated with a sidelink radio channel to adaptively adjust active and sleep modes based on channel congestion, allocate radio resources, and utilize assisting information for power-saving strategies, including dynamic search space and sensing time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors the sidelink channel in active mode, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic mode switching between active and sleep modes based on channel state assessment. The UE transitions from continuous monitoring in active mode to periodic monitoring in sleep mode when channel conditions indicate low traffic, thereby adapting the monitoring intensity to actual communication needs and reducing unnecessary power consumption while maintaining reliability.
Solution Approach 2:
The patent changes the monitoring parameter (monitoring intensity) based on channel state. In active mode, the UE performs full monitoring with high parameter intensity. When channel state indicates low traffic, the UE transitions to sleep mode with reduced monitoring parameter intensity, effectively changing the operational parameters to balance reliability and power consumption.
2Use of energy by moving object
If the UE reduces monitoring in sleep mode, then power saving is improved, but data reception reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the UE assesses channel state (e.g., based on received signal strength, traffic patterns) before transitioning to sleep mode and sets monitoring parameters accordingly. The feedback from channel state assessment ensures that the UE only enters sleep mode when channel conditions permit, maintaining data reception reliability while achieving power savings.
Solution Approach 2:
The patent performs preliminary channel state assessment before transitioning to sleep mode. By evaluating channel conditions in advance (checking for low traffic, assessing signal quality), the UE ensures that entering sleep mode will not compromise data reception reliability, thus preparing the system state beforehand to avoid reliability issues.
3Measurement precision
If the UE monitors the entire search space, then detection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by selectively monitoring only specific portions of the search space (certain subchannels or resource blocks) rather than the entire search space. Based on channel state assessment and traffic patterns, the UE identifies and monitors only the relevant local regions where data is likely to be present, reducing processing complexity while maintaining detection accuracy for actual data transmissions.
4Reliability
If the UE increases active mode time period, then communication coverage is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by alternating between active mode and sleep mode in cycles. The UE performs communication tasks during active mode periods and enters sleep mode during periods when channel state indicates low activity. This periodic switching pattern ensures communication coverage is maintained during active periods while energy consumption is reduced during sleep periods, achieving a balance between the two objectives.
Data Source
AI summary
A method for operating an apparatus (UE) comprising: determining (130), in an active mode, a state associated with a direct mode radio channel, and determining (160; 170), in the active mode, at least one subset of a plurality of radio resources of the direct mode radio channel based on the determined state.