Autonomous Sidelink Sensing Coordination for Power and Latency
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Solution Overview
Problem
In autonomous sidelink communication (SL Mode 2 in NR), continuous sensing operation leads to high power consumption, and existing periodic partial sensing is insufficient for aperiodic traffic, resulting in increased power consumption and potential transmission delays due to lack of coordination between periodic and aperiodic sensing occasions.
Innovation Solution
The proposed solution coordinates and adapts aperiodic sensing occasions based on periodic sensing occasions, modifying sensing windows to minimize power consumption and avoid unnecessary sensing, thereby optimizing resource monitoring and reducing transmission latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous sensing operation is performed in autonomous sidelink communication, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic sensing operations at predetermined intervals instead of continuous sensing. The UE performs sensing at specific periodic occasions determined by higher layer parameters, allowing the device to enter low-power states between sensing events while still maintaining adequate channel awareness for reliable transmissions.
Solution Approach 2:
The patent introduces dynamic adaptation of sensing behavior based on traffic conditions. When aperiodic traffic is detected, the UE dynamically adjusts its sensing operations by identifying overlapping sensing occasions and selectively performing or skipping sensing based on current channel conditions and traffic requirements, optimizing the balance between reliability and power consumption.
2Use of energy by moving object
If periodic partial sensing is used for aperiodic traffic, then power consumption is reduced, but transmission delay increases due to lack of coordination
Solution Approach 1:
The patent performs preliminary sensing during periodic sensing occasions to gather channel state information in advance. This pre-acquired sensing data is then utilized when aperiodic traffic arrives, eliminating the need for additional sensing operations and reducing transmission delay while maintaining low power consumption.
Solution Approach 2:
The patent merges periodic and aperiodic sensing operations by identifying and consolidating overlapping sensing occasions. When periodic sensing is scheduled to occur at the same time as when aperiodic sensing would be needed, the UE performs a single sensing operation that serves both purposes, reducing redundant sensing and associated delays.
3Reliability
If both periodic and aperiodic sensing occasions are performed independently, then sensing coverage is improved, but power consumption increases due to unnecessary overlapping sensing
Solution Approach 1:
The patent extracts and removes redundant sensing operations by identifying overlapping periodic and aperiodic sensing occasions. When overlap is detected, the UE selectively performs sensing only once during the overlapping period rather than independently performing both sensing types, eliminating unnecessary power consumption while maintaining adequate sensing coverage.
Solution Approach 2:
The patent changes the sensing operation parameters dynamically based on the detection of overlapping occasions. The UE adjusts its sensing behavior by modifying which sensing occasions are actually executed, using higher layer parameters to control the sensing pattern and avoid redundant operations while maintaining sufficient channel awareness.
Data Source
AI summary
Systems and methods for coordination of periodic and aperiodic sensing for autonomous (e.g., sidelink) transmission are disclosed herein. In one embodiment, a method performed by a wireless communication device (WCD) comprises starting periodic sensing, where the periodic sensing comprises sensing during a plurality of periodic sensing occasions. The method further comprises, after starting the periodic sensing, detecting a triggering event for an aperiodic sensing occasion and adapting the aperiodic sensing occasion, one or more of the plurality of periodic sensing occasions, or both the aperiodic sensing occasion and the one or more of the plurality of periodic sensing occasions. In this manner, coordination of periodic and aperiodic sensing can be provided. Corresponding embodiments of a WCD are also disclosed.