Sidelink Partial Sensing for Low-Power Resource Selection
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Solution Overview
Problem
Existing sidelink communication technologies consume excessive power due to constant channel sensing, and there is a lack of effective methods for determining time units to be sensed, especially in 5G V2X with flexible resource reservation periods and aperiodic reservations.
Innovation Solution
A method for partial sensing in sidelink communication where a terminal device determines whether a time unit needs to be partially sensed based on the location of candidate time-frequency resources and the type of resource reservation, reducing unnecessary sensing and power consumption by selectively sensing time units with potential interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant channel sensing is performed to ensure reliable resource selection, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial sensing by determining that the terminal device only needs to sense a subset of time units rather than all time units in the sensing window. Specifically, the device identifies time units where other devices may perform periodic resource reservations and limits sensing to those specific time units, thereby reducing power consumption while maintaining sufficient reliability for resource selection.
2Measurement precision
If all time units are sensed to ensure complete interference detection, then interference detection completeness is improved, but device complexity increases
Solution Approach 1:
The patent segments the sensing window into multiple time units and further identifies specific target time units where sensing is actually needed. By dividing the sensing window and selectively processing only relevant segments (time units with potential periodic reservations), the patent reduces the complexity of sensing operations while maintaining complete interference detection for the critical periods.
Solution Approach 2:
The patent applies local quality by making different time units have different sensing requirements. Instead of uniform sensing across all time units, the device identifies specific time units where other devices may perform periodic reservations and applies sensing only to those locations, optimizing the distribution of sensing efforts where they are most needed.
3Adaptability or versatility
If flexible resource reservation periods are supported to improve adaptability, then resource allocation flexibility is improved, but difficulty in determining sensing time units increases
Solution Approach 1:
The patent uses feedback from resource reservation information to determine sensing requirements. By monitoring reservation information from other terminal devices and using it to identify which time units require sensing, the system adapts to flexible resource reservation periods while automatically adjusting the sensing strategy based on actual reservation patterns, thus reducing the difficulty of determining sensing time units.
Data Source
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AI summary
The present disclosure relates to the technical field of communications, and disclosed are a partial sensing method and apparatus, a terminal device, and a storage medium. The method comprises: determining a sensing condition according to a first time unit and first information; and determining, according to the sensing condition, a second time unit needing to be sensed. The first time unit is a time unit where candidate time-frequency resources for resource selection for a first direct connection transmission are located, and the first information comprises: the first direct connection transmission performs aperiodic resource reservation or a reservation period Ts is 0, or, the first direct connection transmission performs periodic resource reservation or the reservation period Ts is not 0.