Sidelink Resource Mapping for PSFCH Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In V2X communication systems, collisions frequently occur on physical sidelink feedback channels (PSFCH) due to multiple devices transmitting feedback information simultaneously, which is not effectively addressed by existing technologies.
Innovation Solution
A method for sidelink resource mapping that assigns index numbers to physical sidelink transmission channels and PSFCH resources based on preset orders of resource factors, configuring a mapping relationship to reduce collisions by determining the correct PSFCH resource for feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminal devices transmit feedback information on PSFCH resources simultaneously, then the feedback information transmission capacity is improved, but resource collision occurs frequently
Solution Approach 1:
The PSFCH resources are segmented into multiple resource groups, where each group corresponds to a specific PSSCH resource group. Terminal devices select PSFCH resources from different groups based on their associated PSSCH resources, thereby segmenting the feedback transmission across multiple resource pools and reducing collision probability.
Solution Approach 2:
The patent introduces a new dimension for resource selection by establishing a mapping relationship between PSSCH resource group indices and PSFCH resource group indices. This dimensional mapping allows terminal devices to select PSFCH resources not only based on time-frequency resources but also based on the group index dimension, effectively expanding the resource selection space and reducing collisions.
2Adaptability or versatility
If PSFCH resources are allocated without structured mapping, then resource allocation flexibility is improved, but resource collision cannot be effectively avoided
Solution Approach 1:
The network device performs preliminary action by pre-configuring the mapping relationship between PSSCH resource groups and PSFCH resource groups before terminal devices transmit feedback information. This pre-established mapping structure guides terminal devices to select PSFCH resources in an organized manner, preventing collisions while maintaining allocation flexibility.
Solution Approach 2:
The patent changes the parameter organization by introducing group indexing parameters for both PSSCH and PSFCH resources. Instead of allocating individual PSFCH resources independently, the system organizes resources into groups and establishes mapping relationships between group indices, thereby structuring the resource allocation to avoid collisions while preserving flexibility through parameter-based selection.
Data Source
AI summary
A sidelink resource mapping method, a sidelink resource transmission method, a network device, and a terminal device are provided. The method includes: obtaining a group of PSFCH resources corresponding to each physical sidelink transmission channel resource in a group of physical sidelink transmission channel resources, where the physical sidelink transmission channel resource includes a PSSCH resource and/or a PSCCH resource; setting an index number for each physical sidelink transmission channel resource in the group of physical sidelink transmission channel resources according to a first preset order of a first resource factor; setting index numbers for the group of PSFCH resources according to a second preset order of a second resource factor; and configuring a mapping relationship between index numbers of the physical sidelink transmission channel resources and index numbers of PSFCH resources corresponding to the physical sidelink transmission channel resources.