Sidelink Partial Sensing for Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face latency and inefficiency in resource utilization due to the need for full sensing in sidelink communication, particularly in NR sidelink resource allocation mode 2, which consumes more power and results in additional latency and non-selectable resources during sidelink active times.
Innovation Solution
Implementing partial sensing and discontinuous reception (DRX) in sidelink communication to reduce power consumption and latency by performing additional sensing for a set of contiguous slots before the sidelink active time, allowing resource selection and transmission during the active time, thereby improving resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full sensing is performed in sidelink communication, then resource selection reliability is improved, but latency and power consumption increase
Solution Approach 1:
The patent applies partial sensing by performing sensing only for a first contiguous sensing duration before the sidelink on-duration active time, rather than continuous full sensing. This partial action reduces latency and power consumption while maintaining sufficient reliability for resource selection during active times.
Solution Approach 2:
The patent performs sensing in advance during the contiguous sensing duration before the active time begins, preparing resource selection information preliminarily. This allows the device to quickly select resources when the active time arrives, reducing latency while maintaining reliability through prior preparation.
2Reliability
If full sensing is performed in sidelink communication, then resource selection reliability is improved, but power consumption increases
Solution Approach 1:
The patent performs sensing only for a limited first contiguous sensing duration before the active time, rather than continuous full sensing throughout all active times. This partial sensing approach reduces power consumption significantly while maintaining resource selection reliability during the active transmission period.
Solution Approach 2:
The patent structures sensing to occur periodically before each sidelink on-duration active time, rather than continuously. This periodic sensing approach reduces power consumption by allowing the device to enter sleep modes between sensing intervals while maintaining reliability through regular sensing updates before each active period.
3Productivity
If additional sensing is performed before active time, then resource utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the sensing operation into a specific first contiguous sensing duration before the active time, separating it from continuous sensing requirements. This segmentation simplifies device implementation by defining clear sensing boundaries and intervals, reducing complexity while improving resource utilization through targeted sensing.
Solution Approach 2:
The patent changes the sensing duration parameter to a specific first contiguous sensing duration rather than using full continuous sensing. This parameter modification reduces device complexity by establishing fixed sensing intervals while improving resource utilization efficiency through optimized sensing timing before active transmissions.
Data Source
AI summary
Methods and apparatuses for handling discontinuous reception and partial sensing for sidelink communication to reduce potential latency due to additional sensing, and to improve resource utilization efficiency. A first device can perform sidelink communication to at least a second device, or a second device in a sidelink resource pool, and trigger to perform resource selection for a sidelink data at a timing. The first device can perform sensing for a first contiguous sensing duration before a sidelink on-duration active time of the second device, determine or select a first sidelink resource from a set of sidelink resources, derive or determine the set of sidelink resources based on at least a sensing result in the first contiguous sensing duration, and perform a first sidelink transmission on the first sidelink resource for transmitting the sidelink data to the second device.