NR V2X Sidelink Allocation with Partial Sensing for Limited-Reception UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation wireless communication systems, user equipment (UE) with limited sidelink (SL) reception capabilities face challenges in efficiently selecting SL resources due to limited sidelink control information (SCI) detection, which deteriorates the efficiency of resource allocation mode 2 operations.
Innovation Solution
A method for UE to efficiently perform sensing in situations with limited SL reception by enhancing resource selection procedures, including sensing and resource allocation techniques that allow for autonomous resource selection within configured pools, utilizing SCI for priority-based resource reservation and measurement of reference signal received power (RSRP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE performs full SL reception operation to detect SCI for resource allocation, then resource allocation efficiency is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by having the UE perform sensing operations only on a subset of slots rather than all slots in the resource pool. The UE determines a first number of slots to sense based on its capability and selects sensing slots from the resource pool, performing SCI detection only in those selected slots. This partial action approach maintains adequate resource allocation efficiency while significantly reducing power consumption compared to full reception operation.
2Use of energy by moving object
If UE limits SL reception operation to save power, then power consumption is reduced, but SCI detection capability deteriorates
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure resource pools and sensing parameters before the UE begins operation. The network provides configuration information including resource pool definitions, slot formats, and sensing parameters that enable the UE to perform partial sensing effectively. This preliminary configuration allows the UE to operate with limited reception capability while maintaining adequate SCI detection capability through optimized sensing in selected slots.
3Measurement precision
If UE performs sensing in all slots to ensure accurate resource selection, then resource selection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the resource pool into multiple slots and having the UE select and sense only a subset of these slots rather than processing all slots. The UE determines a first number of slots to sense based on its capability and selects specific sensing slots from the resource pool. This segmentation approach maintains resource selection accuracy by focusing sensing efforts on critical slots while reducing processing complexity through selective omission of less critical slots.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(d)
AI summary
A method by which a first device performs wireless communication is proposed. The method may comprise the steps of: determining at least one candidate slot for selecting a sidelink (SL) resource; performing sensing for at least one sensing slot related to the at least one candidate slot; selecting the resource in the at least one candidate slot on the basis of the sensing; and performing SL communication with a second device on the basis of the selected resource. For example, the at least one sensing slot may be at least one slot which, from the at least one candidate slot, is located before a resource reservation period set for a resource pool.