PSSCH Resource Pool Segmentation for Priority Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In D2D communication systems, high-priority physical sidelink shared channels (PSSCHs) face a high probability of collision with low-priority PSSCHs due to random resource selection, compromising their quality of service (QoS).
Innovation Solution
Implementing a resource pool configuration method that separates resource pools based on sensing mechanisms (full-sensing, partial-sensing, and random selection) and priority thresholds to determine resource allocation for high-priority PSSCHs, ensuring they are allocated in specific pools with appropriate selection mechanisms to reduce collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If random resource selection is used for PSSCH transmission, then resource allocation flexibility is improved, but collision probability between high-priority and low-priority PSSCHs increases
Solution Approach 1:
The resource pool is segmented into multiple priority-based resource pools (first resource pool for high-priority PSSCH, second resource pool for low-priority PSSCH). This segmentation ensures that high-priority transmissions use dedicated resources while low-priority transmissions use separate resources, thereby reducing collision probability while maintaining allocation flexibility through different pool configurations.
2Object-affected harmful factors
If separate resource pools are configured for different sensing mechanisms, then interference between UEs is reduced, but resource pool complexity increases
Solution Approach 1:
Different resource pools are configured with different local qualities (sensing mechanisms and priority levels). The first resource pool is optimized for high-priority transmissions with full/partial sensing, while the second resource pool is optimized for low-priority transmissions with random selection. This local quality differentiation reduces interference for each priority level while managing complexity through structured configuration.
3Speed
If high-priority PSSCH uses random resource selection, then resource allocation speed is improved, but QoS guarantee capability deteriorates
Solution Approach 1:
High-priority PSSCH transmissions perform preliminary sensing actions (full or partial sensing) before resource selection to identify and avoid resources already occupied by other transmissions. This preliminary action ensures QoS guarantee capability by reducing collision probability, while still maintaining relatively fast allocation compared to continuous sensing, thus balancing speed and reliability.
Data Source
AI summary
A data transmission method and apparatus are applicable to fields such as V2X, intelligent driving, and connected vehicles. A probability of a collision between a high-priority PSSCH and a low-priority PSSCH is reduced, thereby improving QoS of the high-priority PSSCH. The method includes: obtaining resource pool configuration information including first resource pool information and second resource pool information, where the first resource pool information indicates a first resource pool, and the second resource pool information indicates a second resource pool; obtaining a first priority value corresponding to a physical sidelink shared channel PSSCH; when the first priority value is less than a first priority threshold, determining, in a partial-sensing-selection-based resource determination mechanism and/or a random-selection-based resource determination mechanism in the first resource pool, a resource for sending the PSSCH.