V2X Resource Selection via Dynamic PSSCH-RSRP Threshold Adjustment
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Solution Overview
Problem
In V2X communication, the existing method of selecting resources based on physical sidelink shared channel-reference signal received power (PSSCH-RSRP) can lead to the selection of high-interference resources, degrading transmission efficiency and failing to meet latency and priority requirements for sensitive messages.
Innovation Solution
A method where a terminal performs a candidate resource exclusion operation based on PSSCH-RSRP threshold values, determining if the ratio of remaining resources is below a threshold, and adjusts the threshold accordingly based on latency and priority conditions to select suitable resources for V2X message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the PSSCH-RSRP threshold value is increased to secure the number of candidate resources, then the number of candidate resources increases, but the probability of selecting high-interference resources increases
Solution Approach 1:
The patent dynamically adjusts the PSSCH-RSRP threshold value based on the ratio of remaining candidate resources to total resources. When the ratio is below a threshold, the PSSCH-RSRP threshold is increased to exclude more resources, thereby increasing the number of remaining candidate resources while maintaining interference avoidance through conditional adjustment rather than indiscriminate threshold increase
2Object-affected harmful factors
If the candidate resource exclusion operation is performed strictly based on PSSCH-RSRP threshold, then interference is avoided, but latency requirement and priority requirements may not be met
Solution Approach 1:
The patent introduces dynamic adjustment of the PSSCH-RSRP threshold based on message characteristics (latency requirement and priority). For messages with stringent latency or high priority requirements, the threshold adjustment is controlled or skipped, allowing faster resource selection. This dynamic adaptation balances interference avoidance with latency and priority requirements
Solution Approach 2:
The patent applies different threshold adjustment strategies to different V2X messages based on their specific latency requirements and priority levels. High-priority or low-latency messages receive specialized handling where threshold increase is controlled or skipped, while other messages undergo full threshold adjustment. This localized quality adjustment ensures each message type receives appropriate resource selection treatment
3Quantity of substance
If the PSSCH-RSRP threshold value is increased indiscriminately, then more candidate resources are available, but transmission efficiency degrades
Solution Approach 1:
The patent changes the PSSCH-RSRP threshold parameter conditionally based on the ratio of remaining to total resources and message characteristics. Instead of indiscriminate threshold increase, the threshold is adjusted only when necessary (when ratio < threshold) and with control for high-priority messages, thereby securing adequate candidate resources while maintaining transmission efficiency through intelligent, conditional parameter adjustment
Data Source
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AI summary
Provided are a method for transmitting a vehicle-to-everything (V2X) message by a terminal in a wireless communication system, and a device using the method. The method comprises: performing an operation of excluding candidate resources on the basis of a PSSCH-RSRP threshold value in a selection window; determining whether the ratio of remaining candidate resources in the selection window is smaller than a predetermined threshold value; when the ratio is smaller than the threshold value, according to whether at least one of the delay requirement and priority of the V2X message satisfies a predetermined condition, increasing the PSSCH-RSRP threshold value and performing an operation of excluding candidate resources on the basis of the increased PSSCHRSRP threshold value; and transmitting the V2X message by using a resource selected among the remaining candidate resources in the selection window.