Sidelink Partial Sensing for Latency and Resource Efficiency
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing partial sensing and discontinuous reception for sidelink communication, leading to potential latency and inefficient resource utilization due to the need for extensive sensing and continuous monitoring, especially in scenarios involving aperiodic traffic.
Innovation Solution
Implement a method where a device performs partial sensing and discontinuous reception by monitoring sidelink control information for a specific duration before and after a timing, determining sidelink resources based on sensing results, and conducting transmissions on selected resources to optimize resource utilization and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive sensing and continuous monitoring are performed for sidelink communication, then resource selection reliability is improved, but latency increases and resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies partial sensing by monitoring only a subset of sidelink control information rather than continuously monitoring all resources. The device performs sensing for a limited duration (e.g., first time duration before resource selection, second time duration after resource selection) instead of continuous monitoring, achieving adequate resource selection reliability while reducing latency and improving resource utilization efficiency
Solution Approach 2:
The patent implements discontinuous reception with periodic monitoring intervals. The device alternates between active monitoring periods and idle periods, performing sensing operations at specific times (before and after resource selection) rather than continuously. This periodic action maintains reliable resource selection while reducing overall latency and improving resource utilization
2Reliability
If continuous monitoring of sidelink control information is performed, then communication reliability is improved, but power consumption increases and resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements partial monitoring by having the device monitor sidelink control information only during specific time durations (first time duration before resource selection, second time duration after resource selection) rather than continuously. This partial action maintains communication reliability through adequate sensing while significantly reducing power consumption during idle monitoring periods
Solution Approach 2:
The patent applies discontinuous reception with periodic monitoring cycles. The device alternates between active monitoring states and idle states, performing sensing operations at predetermined intervals. This periodic monitoring maintains communication reliability while reducing average power consumption compared to continuous monitoring
3Measurement precision
If extensive sensing duration is used for resource selection, then resource selection accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements partial sensing by monitoring sidelink control information for limited time durations (first time duration before resource selection, second time duration after resource selection) rather than extending sensing over the entire resource pool. This partial sensing achieves adequate measurement precision for resource selection while improving resource utilization efficiency by reducing the time resources consumed for sensing operations
4Loss of time
If partial sensing is implemented with limited monitoring duration, then latency is reduced and resource utilization efficiency is improved, but sensing accuracy may deteriorate
Solution Approach 1:
The patent performs preliminary sensing during the first time duration before resource selection is made. By gathering sensing information in advance during this preliminary period, the device can make informed resource selection decisions with adequate accuracy while maintaining low latency. The preliminary action ensures sufficient sensing accuracy is achieved before the selection deadline
Solution Approach 2:
The patent uses feedback from the second time duration monitoring after resource selection to validate and adjust resource selection decisions. The device monitors sidelink control information during this feedback period to confirm the selected resource is still appropriate, improving sensing accuracy while maintaining low latency through targeted post-selection monitoring
Data Source
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AI summary
Methods and apparatuses for handling partial sensing and discontinuous reception for sidelink communication to reduce potential latency due to additional sensing and to improve resource utilization efficiency. Various embodiments can comprise a first device performing sidelink communication to at least a second device, or a second device in a sidelink resource pool, and triggering to perform resource selection for a sidelink data at a timing (1042), wherein the first device, preferably already, receives or monitors sidelink control information for a, preferably contiguous, time duration before the timing (1044). The first device can perform sensing for a contiguous sensing duration after the timing (1046), determine or select a first sidelink resource from a set of sidelink resources (1048), and perform a first sidelink transmission on the first sidelink resource for transmitting the sidelink data to the second device (1052).