Partial Sensing Resource Selection in NR V2X Sidelink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in sidelink (SL) communication, partial sensing techniques lead to unnecessary power consumption and reliability issues due to meaningless re-evaluation or pre-emption procedures when sensing results are unavailable for all resource slots, causing resource conflicts.
Innovation Solution
A method and device for performing wireless communication based on partial sensing, where a UE selects Y slots within a selection window, performs sensing for at least one slot, and determines SL transmission resources, allowing re-evaluation or pre-emption only for resources not later than the last resource initially selected within each period, thereby optimizing power saving and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If partial sensing is performed only for some slots to save battery consumption, then power saving is improved, but re-evaluation or pre-emption procedures become meaningless when sensing results are unavailable, causing resource conflicts and reliability deterioration
Solution Approach 1:
The resource selection window is divided into multiple slots, and sensing is performed selectively for only some of these slots rather than all slots. This segmentation allows the UE to save power by limiting sensing operations to specific slots while still maintaining adequate resource selection capability through the partial sensing information obtained.
Solution Approach 2:
Sensing operations are performed in advance for selected slots before the actual resource selection and transmission. By conducting sensing preliminarily for specific slots, the UE obtains channel state information ahead of time, enabling informed resource selection while avoiding continuous sensing that would consume excessive power.
2Adaptability or versatility
If re-evaluation or pre-emption procedures are performed without sensing results, then resource reselection flexibility is improved, but unnecessary power consumption increases and resource conflicts occur
Solution Approach 1:
The re-evaluation and pre-emption procedures are conditioned on the availability of sensing results. The UE checks whether sensing information is available for the resource under consideration before initiating re-evaluation or pre-emption. This feedback mechanism ensures that resource reselection actions are taken only when based on valid channel state information, preventing meaningless operations that would waste power and cause conflicts.
Data Source
AI summary
Provided are a method for performing wireless communication based on partial sensing by a first device, and an apparatus for supporting same. The method may comprise: selecting Y slots including a plurality of sidelink (SL) resources within a selection window; performing sensing for at least one slot related to the Y slots; and determining at least one first SL transmission resource based on a resource reservation period and the sensing for the at least one slot, wherein the first device is allowed to perform a re-evaluation procedure or a pre-emption procedure only for resources not later than a last resource among the plurality of SL resources initially selected within each period.