Reduced-Sensing UE Resource Selection for Power-Efficient Sidelink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing resource selection for sidelink (SL) transmissions while minimizing power consumption and ensuring reliability and latency requirements.
Innovation Solution
Implementing partial sensing methods that allow user equipment (UE) to selectively sense resources within a reduced timeframe, using subsets of resource reservation periods and detection occasions based on priority, power level, and UE capability to optimize resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing is performed to ensure reliable resource selection, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by having the UE perform sensing operations only for a subset of resource reservation periods rather than all periods. The UE determines a sensing window that covers only the necessary detection occasions based on its power level and capability, thereby reducing power consumption while maintaining adequate reliability for resource selection.
Solution Approach 2:
The patent changes the sensing window duration and detection occasion coverage parameters based on UE power level and capability. By adjusting these parameters dynamically, the system optimizes the balance between sensing completeness (reliability) and power consumption for different UE types and operating conditions.
2Measurement precision
If sensing duration is extended to cover all resource reservation periods, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent implements partial sensing by limiting the sensing window to cover only the necessary resource reservation periods based on UE capability and power level. This allows the UE to obtain sufficient measurement precision for resource availability detection without the time penalty of sensing all possible periods.
Solution Approach 2:
The patent segments the sensing operation into discrete detection occasions within a determined sensing window. By dividing the sensing task into manageable segments based on resource reservation periods, the system achieves adequate measurement precision while reducing overall sensing time through selective coverage.
3Reliability
If resource re-evaluation and pre-emption checks are performed, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent performs preliminary sensing during the sensing window to identify potentially available resources before the actual resource selection phase. By conducting resource re-evaluation and pre-emption checks in advance based on preliminary sensing results, the system improves reliability while managing complexity through structured, phased processing.
Solution Approach 2:
The patent dynamically adjusts the sensing window and detection occasions based on UE power level, capability, and real-time conditions. This dynamic adaptation allows the system to maintain reliable resource selection by performing necessary re-evaluation and pre-emption checks only when and where needed, thereby managing processing complexity effectively.
Data Source
AI summary
Systems and methods used by reduced sensing user equipment (UE) (relative to a full sensing UE) are disclosed herein. A UE performing partial sensing may use knowledge of resource reservation periods for a resource pool of one or more resources to reduce sensing as compared to the full sensing case. A UE performing resource re-evaluation and/or resource pre-emption may use one or more sensing windows that are relatively smaller than windows used in the full sensing case to reduce sensing. A UE performing prioritized resource selection may use a sensing window to determine availability of resources within it prioritized resource selection window with a high reliability, thereby reducing the need to spend power on other sensing methods (which may include full sensing methods). Combinations of these embodiments are also contemplated.