V2X UE Discontinuous Transmission for Resource Collision Avoidance
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Solution Overview
Problem
In V2X autonomous selection, periodic resource reservations can lead to continuous collisions between vehicles transmitting on the same time-frequency resources, due to the half-duplex system constraint.
Innovation Solution
The evaluating UE intentionally skips one scheduled, reserved time period and performs channel monitoring on the periodically reserved resources. If an SCI of a competing UE is detected, corrective actions are taken based on the relative Resource Reservation Periods (RRPs) and data priorities of the UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vehicles autonomously select periodic time-frequency resources for V2V transmissions, then resource allocation efficiency is improved, but periodic resource collisions occur due to half-duplex constraints
Solution Approach 1:
The patent implements a discontinuous periodic transmission scheme where UEs intentionally skip certain scheduled transmission periods and perform channel monitoring instead. This periodic monitoring action allows UEs to detect resource collisions before they occur, resolving the contradiction by maintaining periodic resource allocation efficiency while adding periodic verification to ensure transmission reliability
Solution Approach 2:
The patent introduces a feedback mechanism where UEs monitor channel conditions during scheduled discontinuous time periods and detect SCI messages from competing UEs. This feedback loop enables UEs to identify resource collisions and adjust their transmission schedules accordingly, resolving the contradiction between efficient periodic resource allocation and reliable collision-free transmission
2Productivity
If UEs continuously transmit on reserved resources, then data transmission efficiency is improved, but resource collisions cannot be detected
Solution Approach 1:
The patent implements a discontinuous transmission scheme where UEs intentionally skip certain scheduled transmission periods. During these skipped periods, UEs perform channel monitoring to detect potential resource collisions. This skipping approach resolves the contradiction by sacrificing some transmission opportunities to gain collision detection capability, thereby protecting overall data transmission efficiency
Data Source
AI summary
Systems, methods and circuitries are provided for performing UE autonomous selection in a vehicle-to-anything (V2X) communication environment, that includes one or more processors configured to schedule resources for discontinuous periodic transmission having a scheduled discontinuous time period in which scheduled resources are not transmitted. The one or more processors are further configured to perform a monitoring operation at the scheduled discontinuous time period, the monitoring operation comprising a monitoring for a collision of scheduled resources of the evaluating UE with scheduled resources of a competing UE, and selectively perform a corrective action when a collision of scheduled resources of the evaluating UE with scheduled resources of the competing UE is detected during the monitoring operation.