Sidelink Sensing with Contiguous Partial Sensing for Lower Power
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Solution Overview
Problem
Existing 5G/NR communication systems face challenges in managing power consumption and resource allocation for sidelink (SL) operations, particularly in scenarios involving periodic and aperiodic traffic, leading to increased processing complexity and power consumption due to extensive sensing requirements.
Innovation Solution
Implementing an adaptive low-power sensing operation for SL communications, utilizing partial sensing methods such as periodic-based partial sensing (PBPS) and contiguous partial sensing (CPS) to optimize resource selection and reduce power consumption, while maintaining effective channel assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If extensive sensing is performed for SL resource selection, then channel assessment accuracy is improved, but power consumption and processing complexity increase
Solution Approach 1:
The sensing operation is segmented into two distinct phases: a first sensing phase that performs initial channel assessment with lower power consumption, and a second sensing phase that performs additional assessment only when necessary. This segmentation allows the system to achieve adequate channel assessment accuracy while significantly reducing overall power consumption by avoiding continuous extensive sensing.
Solution Approach 2:
The patent applies partial sensing by performing sensing operations only for a subset of candidate slots rather than all possible slots. The UE performs sensing in a first set of candidate slots and uses that information for resource selection, avoiding the excessive action of sensing all potential slots. This partial action approach maintains sufficient measurement precision while reducing power consumption.
2Measurement precision
If extensive sensing is performed for SL resource selection, then channel assessment accuracy is improved, but processing complexity increases
Solution Approach 1:
The sensing operation is segmented into two distinct phases: a first sensing phase that performs initial channel assessment with lower processing complexity, and a second sensing phase that performs additional assessment only when necessary. This segmentation reduces the overall processing complexity by breaking down the sensing task into manageable stages rather than requiring continuous extensive processing.
Solution Approach 2:
The patent applies partial sensing by performing sensing operations only for a subset of candidate slots rather than all possible slots. This partial action approach reduces processing complexity by limiting the scope of sensing to necessary candidates, while still maintaining sufficient measurement precision for effective resource selection.
3Use of energy by moving object
If partial sensing is used for SL operations, then power consumption is reduced, but sensing coverage is limited
Solution Approach 1:
The sensing operation is segmented into two phases where the first phase provides baseline sensing coverage with low power consumption, and the second phase provides additional coverage only when needed. This segmentation allows the system to maintain adequate sensing coverage for effective resource selection while significantly reducing power consumption compared to continuous full sensing.
Solution Approach 2:
The first sensing phase performs preliminary sensing operations that establish a baseline understanding of the channel conditions before the second sensing phase. This preliminary action ensures that sufficient sensing coverage is achieved for initial resource selection, reducing the need for extensive continuous sensing and thereby lowering power consumption.
Data Source
AI summary
Methods and apparatuses for adaptive low-power sensing operations for sidelink (SL) communications in a wireless communication system. A method of operating a user equipment (UE) includes operating with partial sensing; operating in a resource pool configured for the partial sensing; and triggering for a SL resource selection in a slot n. The method further includes selecting Y candidate slots for the SL resource selection and performing, in a sensing window, a contiguous partial sensing (CPS). A first of the selected Y candidate slots is a slot t′y0SL. The sensing window is in contiguous slots within the resource pool relative to the slot t′y0SL.