Safety-Dependent V2X Transmission Scheduling With Alert Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current V2X systems inefficiently utilize wireless spectrum by periodically broadcasting messages, leading to suboptimal reception by neighboring vehicles.
Innovation Solution
A system and method for safety-dependent vehicle-to-everything (V2X) transmission that includes detecting the position of neighboring UEs, generating an alert time window, and scheduling transmissions based on this window to optimize spectrum efficiency and ensure timely message reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X systems periodically broadcast messages at high rate, then the probability of on-time reception by neighboring vehicles is improved, but the utilization of wireless spectrum deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from static periodic broadcasting to dynamic scheduled transmissions. The system calculates alert time windows based on real-time relative positions of vehicles and dynamically schedules transmissions only when needed, within the calculated time window. This dynamic adaptation allows the system to maintain reliable communication while avoiding unnecessary spectrum usage during periods when vehicles are not in critical proximity.
Solution Approach 2:
The patent changes the parameter of transmission timing from fixed periodic intervals to variable schedules based on alert time windows. By calculating the alert time window using relative position and speed parameters, the system adjusts transmission timing to match actual safety requirements. This parameter change enables the system to transmit only when safety-critical information is needed, improving both reception reliability and spectrum efficiency.
2Reliability
If V2X systems broadcast messages periodically at high rate, then message reception reliability is improved, but spectrum efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by calculating the alert time window in advance based on current relative positions and estimated future positions of vehicles. The transmitting vehicle determines when the target vehicle will be within the safety-critical zone and schedules transmissions accordingly. This preliminary calculation allows the system to ensure reliable message delivery while avoiding unnecessary transmissions during periods when vehicles are not in critical proximity, thereby improving spectrum efficiency.
Solution Approach 2:
The system incorporates feedback mechanisms where vehicles continuously report their positions and speeds, allowing the transmitting vehicle to recalculate alert time windows based on actual relative motion. This feedback loop enables dynamic adjustment of transmission schedules to match real-time safety requirements, maintaining reliable communication while optimizing spectrum usage by transmitting only when actually needed.
Data Source
AI summary
A user equipment (UE) for vehicle-to-everything (V2X) transmission is provided. The UE includes: at least one transceiver; at least one memory; and at least one processor, coupled with the at least one transceiver and the at least one memory, the at least one processor configured to: detect a second position of a second UE with respect to a first position of the UE; generate an alert time window based on the first position of the UE and the second position of the second UE; and schedule at least one transmission from the UE to the second UE based on the alert time window.