Sidelink Resource Selection Using DRX Active Time Intersection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink (SL) communication, especially in scenarios where the receiving end is configured with discontinuous reception (DRX), the transmitting end faces challenges in performing effective resource selection or resource exclusion.
Innovation Solution
A method for sidelink resource selection and exclusion, where a first terminal device selects at least N transmission resources within a first time range that includes the intersection of a link monitoring period and a resource selection period, and acquires a set of candidate resources by excluding available resources within a resource selection period, ensuring a sufficient number of candidate resources during the DRX active time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitting end performs resource selection without considering DRX configuration, then the resource selection process is simple, but the communication reliability deteriorates because the receiving end may be in sleep state and cannot receive transmissions
Solution Approach 1:
The transmitting end performs preliminary action by determining the DRX active time period before resource selection. It calculates the intersection between the resource selection period and DRX active time period in advance, ensuring that selected resources fall within the receiving end's active reception window, thereby guaranteeing reliable delivery without complex real-time adjustments
Solution Approach 2:
The patent applies parameter changes by modifying the resource selection criteria based on DRX configuration parameters. The transmitting end adjusts the effective resource selection period by intersecting it with the DRX active time period, effectively changing the time parameter range for resource selection to match the receiving end's active state
2Reliability
If the transmitting end selects resources only within the resource selection period, then the resource selection process is fast, but the receiving end may enter sleep state and miss transmissions
Solution Approach 1:
The transmitting end performs preliminary calculation of the DRX active time period and its intersection with the resource selection period before actual resource selection begins. This advance preparation allows the system to efficiently identify valid resources without time-consuming real-time adjustments, maintaining both reliability and speed
3Reliability
If the transmitting end ensures multiple transmissions during DRX active period, then the receiving end receives multiple transmissions even if it enters sleep state, but the number of available resources is reduced
Solution Approach 1:
The patent applies local quality by differentiating the treatment of resources based on their temporal characteristics. It identifies and prioritizes resources that fall within the DRX active time period intersection, ensuring these specific resources are selected for multiple transmissions to guarantee delivery during active state, while other resources may be used differently
Solution Approach 2:
The system performs preliminary identification of the DRX active time period and calculates its intersection with the resource selection period in advance. This allows the transmitting end to pre-determine which resources should be allocated for multiple transmissions during active periods, ensuring reliable delivery while efficiently managing the reduced resource pool
Data Source
AI summary
Provided is method for sidelink resource selection, which is applicable to a first terminal device. And the method includes: selecting at least N transmission resources within a first time range, N being an integer greater than or equal to 1; wherein the first time range comprises an intersection of a link monitoring period and a resource selection period, the link monitoring period being determined based on discontinuous reception (DRX) configuration, and the resource selection period being a time period in which the first terminal device performs resource selection.