Sidelink HARQ Feedback Resource Allocation for V2X Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource allocation for sidelink feedback channels in vehicle-to-everything (V2X) communication, particularly in scenarios involving partial or out-of-coverage conditions, which affect the reliability and latency of services like platooning and advanced driving.
Innovation Solution
A method and apparatus for resource allocation of sidelink feedback channels in a wireless communication system, enabling UEs to autonomously select resources based on preconfigured pools and report HARQ feedback information using PSFCH configuration, supporting unicast, groupcast, and broadcast communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If autonomous resource selection based on preconfigured pools is implemented, then resource allocation flexibility and latency are improved, but resource utilization efficiency and reliability deteriorate in partial or out-of-coverage scenarios
Solution Approach 1:
The patent introduces a base station as an intermediary entity that coordinates resource allocation among UEs. The base station receives resource selection information from UEs, determines collision-free resource allocations, and provides feedback to UEs. This intermediary mechanism resolves the contradiction by maintaining autonomous selection benefits while adding centralized coordination to ensure reliability in partial or out-of-coverage scenarios.
2Productivity
If UEs autonomously select resources from preconfigured pools, then resource allocation speed is improved, but resource allocation efficiency and collision avoidance worsen
Solution Approach 1:
The patent implements a feedback mechanism where UEs report their selected resource pool information to the base station, which then provides feedback on resource allocation decisions. This feedback loop enables the base station to coordinate resource selections, avoid collisions, and optimize allocation efficiency while maintaining the speed benefits of autonomous selection by not requiring full centralized scheduling.
3Reliability
If centralized resource allocation is used, then resource utilization efficiency is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies partial centralized control rather than full centralized allocation. UEs autonomously select resources from preconfigured pools without requiring complete base station scheduling for each transmission. This partial action approach maintains resource utilization efficiency through base station coordination while avoiding the excessive complexity and signaling overhead of fully centralized resource allocation.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~3
AI summary
An operating method of a terminal in a wireless communication system is provided. The method includes acquiring resource pool information for sidelink communication, receiving, from another terminal, a physical sidelink shared channel (PSSCH), and reporting, to the another terminal, a hybrid automatic request (HARQ) feedback information corresponding to the receiving of the PSSCH, based on physical sidelink feedback channel (PSFCH) configuration information included in the resource pool information.