Sidelink Partial Sensing Windows for Low-Power Resource Reevaluation
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Solution Overview
Problem
Existing 3GPP mechanisms for sidelink communications between user equipments (UEs) require enhancements in resource allocation to improve efficiency and reduce power consumption, particularly for UEs with reduced power capabilities such as pedestrian devices.
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 integrating these with sidelink discontinuous reception (DRX) to minimize power consumption while ensuring 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 traffic type (periodic or aperiodic) and configured parameters T_A and T_B, reducing the total number of sensing operations while maintaining adequate resource selection reliability
Solution Approach 2:
The sensing window is divided into multiple sensing occasions, and the UE selectively performs sensing on specific occasions rather than continuously. The sensing occasions are segmented based on the resource selection window size and configured parameters, allowing the UE to distribute sensing efforts across discrete time points rather than continuous monitoring
2Productivity
If sensing window size is increased to improve resource selection accuracy, then resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent introduces adjustable parameters T_A and T_B that dynamically define the sensing window boundaries based on traffic characteristics. For periodic traffic, the sensing window is configured differently than for aperiodic traffic, allowing the system to adapt the sensing window size and position to match the actual resource allocation needs without requiring fixed complex sensing structures
Solution Approach 2:
The patent changes the sensing approach by introducing configurable parameters T_A (sensing window start offset) and T_B (sensing window end offset) that adjust the sensing window characteristics. These parameters allow flexible control over the sensing window size and position, enabling optimization of resource allocation efficiency while keeping the sensing mechanism manageable through parameter adjustment rather than structural complexity
3Use of energy by moving object
If partial sensing is implemented to reduce power consumption, then power consumption is reduced, but resource allocation reliability may deteriorate
Solution Approach 1:
The patent incorporates feedback mechanisms where the UE evaluates the results from partial sensing occasions and uses this information to make informed resource selection decisions. The sensing results from selected occasions provide feedback about channel conditions and resource availability, enabling reliable resource selection despite reduced sensing coverage
Solution Approach 2:
The patent performs preliminary sensing actions at specific sensing occasions before the actual resource selection. By conducting sensing in advance at strategically chosen occasions defined by parameters T_A and T_B, the UE gathers necessary channel information beforehand, enabling reliable resource selection without requiring continuous or exhaustive sensing
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.