Sidelink Resource Selection for DRX Active Time
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently selecting sidelink resources for user equipment (UE) configured for discontinuous reception (DRX), leading to inefficiencies in resource utilization and potential waste of processing and signaling resources due to the UE's inactive periods during DRX cycles.
Innovation Solution
A method and apparatus for a UE to provide an indication of sidelink resources or slots that are within the active time of a DRX cycle to the physical layer, avoiding those in inactive times, allowing for selective sidelink resource selection and transmission only during active periods, thereby conserving resources and optimizing communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink resources are allocated without considering DRX cycles, then resource allocation is simplified, but resource utilization efficiency deteriorates due to transmissions during inactive periods
Solution Approach 1:
The transmitting UE performs preliminary actions by determining the DRX cycle pattern of the receiving UE before allocating sidelink resources. The transmitting UE identifies active and inactive periods in advance, then proactively selects transmission resources that fall only within active periods. This preliminary knowledge of DRX patterns enables the transmitting UE to pre-plan resource allocation, avoiding waste during inactive periods while maintaining efficient resource utilization.
2Loss of energy
If sidelink communications are transmitted during all time slots, then communication continuity is maintained, but processing and signaling resources are wasted during inactive DRX periods
Solution Approach 1:
The system employs feedback mechanisms where the transmitting UE monitors and determines the DRX cycle pattern of the receiving UE. This feedback information about active and inactive periods is used to dynamically adjust transmission scheduling. By aligning transmissions with active periods indicated through this feedback loop, the system avoids wasting processing and signaling resources during inactive periods while maintaining communication reliability through coordinated scheduling.
3Ease of manufacture
If resource allocation ignores DRX inactive periods, then allocation process is simpler, but resource waste increases during inactive times
Solution Approach 1:
The invention changes the parameters of resource allocation by introducing DRX cycle timing as a constraint parameter. Instead of uniform resource allocation, the system modifies allocation parameters to account for varying active and inactive periods. The transmitting UE adjusts transmission timing parameters based on the receiving UE's DRX pattern, thereby reducing resource waste during inactive periods while maintaining allocation simplicity through systematic parameter adjustment rules.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may provide, to a physical layer from a higher layer, an indication of a set of sidelink resources or slots that are for an active time of a discontinuous reception (DRX) cycle of a second UE or destination identifier (ID) and that are not for an inactive time of the DRX cycle of the second UE or destination ID. The first UE may transmit, to the second UE or one or more UEs associated with the destination ID, a sidelink communication that is based at least in part on the set of sidelink resources or slots. Numerous other aspects are described.