Sidelink Partial Sensing Windows for Low-Power Resource Selection
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Solution Overview
Problem
Existing 3GPP mechanisms for sidelink communications in user equipment (UEs) require improvements in resource allocation to enhance efficiency and reduce power consumption, particularly for pedestrian UEs with reduced capabilities.
Innovation Solution
Implementing partial sensing methods, including contiguous and periodic-based partial sensing, with adjustable parameters T_A and T_B, to optimize resource selection and reevaluation, and addressing interactions with sidelink discontinuous reception (DRX) to minimize power consumption and ensure reliable resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing is performed for resource selection in sidelink communications, then resource allocation reliability is improved, but power consumption increases significantly
Solution Approach 1:
The patent implements partial sensing where the UE performs sensing only on a subset of candidate resources rather than all resources. Specifically, the UE determines a sensing window and selects certain sensing occasions within this window based on configured parameters, performing resource availability checks only at these partial occasions. This reduces power consumption while maintaining sufficient reliability for resource allocation.
Solution Approach 2:
The sensing process is segmented into multiple discrete sensing occasions within a defined sensing window. The UE divides the resource selection process into specific monitoring points (sensing occasions) rather than continuous sensing. This segmentation allows the UE to control power consumption by adjusting the density and duration of sensing occasions while still gathering necessary channel state information.
2Manufacturing precision
If sensing window duration is extended to improve resource selection accuracy, then resource allocation precision is improved, but time delay increases
Solution Approach 1:
The patent introduces dynamic adjustment of sensing window parameters including duration, start time, and end time. The sensing window is configured with flexible parameters that can be adapted based on traffic conditions, UE capabilities, and network requirements. This dynamic configuration allows optimization between accuracy and delay by adjusting the window size and position according to specific scenarios.
Solution Approach 2:
The patent changes key parameters of the sensing process including the sensing window duration (configured by parameters like sl-SensingWindowLength), the number of sensing occasions, and the time offset between sensing and resource selection. These parameter changes enable the system to adapt sensing intensity and duration to balance accuracy requirements against time delay constraints for different application scenarios.
3Use of energy by moving object
If contiguous partial sensing is implemented to reduce power consumption, then power efficiency is improved, but resource allocation reliability may deteriorate
Solution Approach 1:
The patent performs preliminary sensing actions at configured sensing occasions before final resource selection. The UE proactively monitors channel conditions at specific predetermined occasions within the sensing window, gathering channel state information in advance. This preliminary action at strategic points maintains reliability while avoiding continuous sensing, thus improving power efficiency.
Solution Approach 2:
The patent incorporates feedback mechanisms where the UE evaluates channel conditions at sensing occasions and uses this feedback to make informed resource selection decisions. The sensing results from partial sensing occasions provide feedback about channel occupancy and interference levels, which the UE uses to select reliable resources, thereby maintaining allocation reliability despite reduced sensing coverage.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for partial sensing for resource selection, reevaluation, and preemption. In some embodiments: a UE receives configuration information for a resource pool; determines a type of traffic to be transmitted by the UE, the type to include aperiodic traffic or periodic traffic; determines, based on the configuration information and traffic type, first and second values to define a window for contiguous partial sensing; and performs contiguous partial sensing within the window.