V2X Resource Reservation Method for Sidelink Mode 4 Conflict Avoidance
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Solution Overview
Problem
In Vehicle-to-Everything (V2X) systems using Sidelink (SL) transmission technology, close proximity of User Equipment (UEs) leads to similar available resource sets, increasing the likelihood of resource conflicts during resource selection and reservation in Mode 4, where terminals independently select resources based on sensing results.
Innovation Solution
A resource reservation method where terminals perform sensing and selection within specific time windows, exclude conflicting resources, and prioritize resource usage based on energy levels and service priorities, with the option to reselect resources if conflicts are detected, and communicate resource information through control channels to prevent overlapping usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminals independently select resources based on sensing results in Mode 4, then transmission delay is reduced and spectrum efficiency is improved, but resource conflicts increase when UEs are in close proximity
Solution Approach 1:
The patent applies preliminary anti-action by having terminals proactively reserve resources in advance and send reservation information through control channels before actual data transmission. This allows other terminals to detect the reservation and avoid selecting the same resources, thereby preventing conflicts before they occur. The sensing mechanism continuously monitors reserved resources, enabling terminals to take preemptive measures to avoid collisions.
Solution Approach 2:
The patent implements feedback through the sensing mechanism where terminals continuously monitor control channels to detect resource reservations made by other UEs. This feedback loop allows terminals to adjust their resource selection based on current network conditions and detected reservations, improving resource allocation reliability while maintaining the autonomous Mode 4 operation.
2Reliability
If terminals use sensing and reservation to determine transmission resources, then resource conflicts are reduced to some extent, but available resource sets become very similar when UEs are close, leading to same resource selection
Solution Approach 1:
The patent applies local quality by allowing each terminal to have its own unique resource reservation pattern and selection criteria within the same resource pool. Even when UEs are in close proximity and face similar available resource sets, each terminal can make locally optimized selections based on its specific sensing results, channel conditions, and reservation status, thereby diversifying resource selections and reducing conflicts.
Solution Approach 2:
The patent uses preliminary action by having terminals perform resource reservation and send control information in advance before actual data transmission. This early reservation establishes a clear resource allocation state that other terminals can detect through sensing, allowing them to make informed decisions and avoid selecting already-reserved resources, thus reducing conflicts despite similar available resource sets.
3Reliability
If terminals continuously perform sensing and resource selection, then resource conflicts are minimized, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by having terminals perform sensing and resource selection at specific intervals rather than continuously. Terminals monitor control channels periodically to detect resource reservations and update their sensing results, maintaining resource allocation reliability while significantly reducing energy consumption compared to continuous monitoring. This periodic operation allows terminals to balance between conflict avoidance and power savings.
Data Source
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AI summary
Disclosed in the present invention are a resource reservation method and device, and a computer storage medium. The method comprises: a first terminal sending a first channel, the first channel being used to determine information concerning a resource selected by the first terminal.