Sidelink Resource Selection for DRX-Aligned Transmission Reliability
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Solution Overview
Problem
In discontinuous reception (DRX) mechanisms for sidelink communication, insufficient available resources for timely and reliable service transmission occur due to slots reserved for synchronization signals or non-uplink transmissions, leading to power inefficiency and unreliable data exchange.
Innovation Solution
A resource selection method that includes triggering reselection of transmission resources to ensure they fall within the DRX active time of the receiving device, considering priority and availability, using various reselection strategies for different scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX mechanism is applied to sidelink to save power, then energy consumption is reduced, but available transmission resources become insufficient
Solution Approach 1:
The patent applies dynamics by making the DRX active time configurable and adaptable. The network can dynamically adjust the drx-OnDurationTimer and drx-SlotOffset parameters to optimize the balance between power saving and resource availability. This allows the system to adaptively change the monitoring window duration and starting position based on traffic patterns and service requirements, ensuring sufficient resources are available during active periods while maximizing power savings during inactive periods.
Solution Approach 2:
The patent utilizes parameter changes by modifying DRX configuration parameters (drx-OnDurationTimer, drx-SlotOffset, drx-Cycle) to resolve the contradiction. By adjusting these parameters, the system can extend or shift the active monitoring window to align with periods when transmission resources are available, thereby ensuring both power efficiency and reliable service transmission without requiring continuous monitoring.
2Reliability
If DRX monitoring window is extended to ensure resource availability, then service transmission reliability is improved, but power saving effect is reduced
Solution Approach 1:
The patent applies preliminary action by proactively configuring the DRX parameters before resource selection occurs. The network pre-configures the drx-OnDurationTimer and drx-SlotOffset to ensure that the active monitoring window aligns with periods when transmission resources are available. This preliminary configuration prevents resource unavailability issues before they occur, eliminating the need to extend the monitoring window beyond the configured active time, thereby maintaining power saving effectiveness while ensuring reliability.
3Reliability
If resource reselection is triggered to align with DRX active time, then transmission reliability is improved, but resource selection complexity increases
Solution Approach 1:
The patent implements feedback by having the UE check whether selected transmission resources fall within the DRX active time window. If resources are selected outside the active time (determined by drx-OnDurationTimer and drx-SlotOffset), the resource selection procedure is triggered again. This feedback mechanism ensures transmission reliability by guaranteeing resources align with monitoring periods, while the automated nature of the check and re-triggering keeps the complexity manageable through clear, rule-based logic.
Data Source
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AI summary
The present disclosure provides a resource selection method and apparatus, and a terminal. The method is applied to a transmitting device and includes: performing first processing before transmission corresponding to a selected sidelink grant is performed, so that the transmission is in a time in which a receiving device is capable of performing sidelink reception.