V2X Resource Selection Window for Reduced Transmission Delay
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Solution Overview
Problem
In vehicle-to-everything (V2X) systems, the random selection of resources for initial transmission in the sidelink transmission mode leads to large service transmission delays due to the selection of candidate resources located at relatively rearward positions in the time domain.
Innovation Solution
A method and apparatus for resource selection in V2X systems that select an initial transmission resource within a specific time window, ensuring the resource is located between time n and time n+p, where the resource selection window is from time n+T11 to time n+T12, with T11 greater than or equal to the processing delay and T12 within the required delay range, and p less than a preset value W, thereby reducing delay by avoiding rearward time domain positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal randomly selects a resource from the entire resource selection window, then the resource selection flexibility is improved, but the service transmission delay increases due to selection of rearward time domain positions
Solution Approach 1:
The patent segments the resource selection window into two distinct parts: a first resource selection window for initial transmission and a second resource selection window for retransmission. By dividing the original selection window, the system enables targeted resource selection that prioritizes earlier time positions for initial transmission, thereby reducing service transmission delay while maintaining overall selection flexibility through the separate second window for retransmission scenarios.
2Quantity of substance
If the resource selection window extends to later time positions, then the available resource options increase, but the service transmission delay increases due to rearward position selection
Solution Approach 1:
The patent applies local quality by assigning different selection priorities to different parts of the resource selection window. The first resource selection window is configured to prioritize earlier time positions for initial transmission, while the second resource selection window handles retransmission needs. This localized optimization ensures that critical initial transmissions use earlier resources to minimize delay, while later resources remain available in the second window for retransmission scenarios.
Data Source
AI summary
The present application discloses a method and a device for resource selection in a vehicle networking system, a terminal and a medium, relating to the field of wireless communication, wherein the method comprises the following steps: when there is a service to be transmitted at time n, select an initial transmission resource of the service in a resource selection window, the initial transmission resource is located between time n and time n+p; wherein, the resource selection window is a window from time n+T11 to time n+T12, a first time period from time n to time T11 is greater than or equal to a processing delay of a sending terminal, a second time period from time n to time T12 is equal to or less than a required delay range of the service, and the value of p is less than a preset value W. In the present application, when the terminal performs resource selection in the resource selection window, by selecting the initial transmission resource of the service between time n and time n+p, it avoids the initial transmission service of the resource through a lower time domain position in the resource selection window, and reduces the delay of service transmission.