V2X Resource Selection via Dynamic Sensing Mode Switching
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Solution Overview
Problem
Current V2X communication systems face challenges in resource selection, particularly for P-UEs with limited power endurance, leading to resource collisions and increased power loss due to inefficient channel sensing and random resource selection modes, which fail to meet the high transmission density and low latency requirements of V2X communications.
Innovation Solution
A method for V2X communications where a UE determines configuration information of transmission resource pools, selects a resource pool based on channel sensing status, and chooses a resource selection mode (random or partial-channel-sensing-based) to optimize power usage and reduce collisions, involving one-shot or resource reservation modes to ensure timely data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If random resource selection mode is used, then device complexity is reduced, but resource collision increases and transmission reliability deteriorates
Solution Approach 1:
The patent implements dynamic resource selection by switching between random resource selection mode and partial channel sensing mode based on power endurance status. When power endurance is sufficient, partial channel sensing is performed to improve reliability; when power endurance is limited, random resource selection is used to reduce complexity and power consumption. This dynamic adaptation resolves the contradiction between device complexity and transmission reliability.
2Reliability
If partial channel sensing is performed, then resource collision is reduced and transmission reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the channel sensing depth and resource selection strategy based on real-time power endurance status. When power endurance is sufficient, more extensive partial channel sensing is performed to reduce resource collisions. When power endurance is limited, the system reduces sensing activities and switches to random resource selection, thereby resolving the contradiction between transmission reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of channel sensing intensity based on power endurance status. By adjusting the sensing window size, sensing frequency, and resource selection strategy according to power availability, the system optimizes the balance between transmission reliability and power consumption, allowing P-UEs to adapt to varying power conditions.
3Measurement precision
If channel sensing is continuously performed, then resource selection accuracy is improved, but power loss increases for P-UEs
Solution Approach 1:
The patent implements partial channel sensing instead of continuous full channel sensing. P-UEs perform sensing on a subset of resources or at reduced frequency, which maintains adequate resource selection accuracy while significantly reducing power loss. This partial action approach allows P-UEs to function effectively without depleting their limited power reserves.
4Reliability
If resource reservation mode is used, then transmission reliability is improved under high load, but device complexity increases
Solution Approach 1:
The system dynamically switches between one-shot resource selection and resource reservation modes based on channel conditions and load status. Under high load conditions, resource reservation mode is activated to improve transmission reliability by securing resources in advance. Under normal conditions, simpler one-shot selection is used to reduce complexity. This dynamic switching resolves the contradiction between reliability and device complexity.
Data Source
AI summary
The present disclosure provides a method for determining a resource of a communication by a terminal in a wireless communication system, the method comprising: receiving, from a base station, information on a minimum number of subframes for monitoring; determining a number of a plurality of subframes to be monitored based on the minimum number of subframes; identifying the plurality of subframes to be monitored for a sidelink transmission; and transmitting, to the base station, information indicating a set of subframes for the sidelink transmission selected based on the plurality of subframes.