Sidelink Resource Pool Partial Sensing for Power-Efficient UE Selection
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Solution Overview
Problem
Existing sidelink communication technologies consume excessive power in devices with limited battery supply, such as pedestrian UEs, due to rigorous resource reservation monitoring and sensing, which is inefficient for the diverse range of applications supported by 5G NR SL communication.
Innovation Solution
Implementing a partial sensing method with a time-bound resource selection window and candidate slot selection to reduce power consumption while maintaining communication performance and reliability, by determining a subset of resources in the sidelink resource pool based on mode 2 resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing operation is performed to monitor and sense all SL resources in every slot, then collision-free resource selection is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by monitoring only a subset of SL resources rather than all resources in every slot. The UE determines a sensing window and monitors PSCCH resources within this window, performing partial sensing operations instead of full sensing, which reduces power consumption while maintaining adequate collision avoidance capability.
Solution Approach 2:
The patent segments the SL resource pool into a sensing window and non-sensing periods. The UE divides the monitoring task into specific time intervals (sensing window defined by start slot and length) and monitors only during these segmented periods, rather than continuously monitoring all resources, thereby reducing overall power consumption.
2Use of energy by moving object
If random resource selection without sensing is used to save power, then power consumption is reduced, but collision probability increases
Solution Approach 1:
The patent implements partial sensing as a middle ground between no sensing and full sensing. The UE performs sensing operations on a partial set of resources (within the defined sensing window) rather than no sensing at all, which provides adequate collision detection capability while consuming significantly less power than full sensing would require.
3Use of energy by moving object
If partial sensing scheme is implemented for P2X communication, then power saving is achieved, but adaptability to diverse 5G NR SL applications is limited
Solution Approach 1:
The patent introduces dynamic parameters for partial sensing including configurable sensing window start slots, window lengths, and maximum number of PSCCH resources to monitor. These dynamic parameters allow the sensing behavior to be adapted to different application requirements (V2V, V2P, V2I, P2X) while maintaining power saving benefits, providing versatility across diverse 5G NR SL applications.
Solution Approach 2:
The patent enables adaptation to diverse applications by changing key parameters such as sensing window duration, start slot position, and maximum PSCCH resource monitoring count. These parameter changes allow the same partial sensing mechanism to be optimized for different traffic patterns and application requirements without sacrificing power efficiency.
Data Source
AI summary
A user equipment (UE) and a resource monitoring method in sidelink communication are provided. The resource monitoring method in sidelink communication by the UE includes receiving, by a physical layer of the UE, a request and/or a configuration from a higher layer of the UE, to determine a subset of resources of a sidelink resource pool as part of partial sensing based on a mode 2 resource allocation for sidelink transmission, determining a resource selection window and/or selecting a number of candidate slots in the sidelink resource pool according to a time bound, monitoring slots according to the number of candidate slots and a set of one or more reservation periods provided by the higher layer, and reporting, to the higher layer, a set of candidate single-slot resources after exclusion of resources.