V2X Communication Interference Coordination via Predictive Position Tables
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Solution Overview
Problem
In a dynamic vehicular environment with heavy traffic, existing solutions fail to effectively reduce interference between Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communications occurring in the same frequency band, particularly around road infrastructure stations, leading to performance degradation and increased latency in safety-critical data transmissions.
Innovation Solution
A method is proposed where a transportation vehicle announces its future positions and transmission characteristics to surrounding vehicles and network management stations, using cooperative transmission techniques to adjust signal transmissions and minimize interference. This involves determining the vehicle's position, calculating a table of predicted positions and transmission characteristics, and transmitting this information to surrounding vehicles or network management stations to schedule non-interfering transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2V and V2I communications operate in the same frequency band without coordination, then communication coverage and signal strength are maintained, but interference increases leading to performance degradation and increased latency
Solution Approach 1:
The system performs preliminary actions by determining future positions of the vehicle and calculating a table of predicted positions with transmission characteristics before actual communication occurs. This advance planning allows the vehicle to announce its future transmission schedule to surrounding vehicles and infrastructure, enabling them to coordinate and avoid interference proactively rather than reactively.
Solution Approach 2:
The system implements feedback mechanisms where transmission characteristics are determined based on future positions, and this information is fed back to surrounding vehicles and network management stations. The feedback loop enables continuous optimization of transmission parameters as the vehicle moves, maintaining reliable communication while minimizing interference through adaptive coordination.
2Area of stationary object
If signal transmission power is increased to maintain communication quality, then communication range is extended, but interference with other transmissions increases
Solution Approach 1:
The system applies local quality by determining transmission characteristics specific to each future position and direction. Instead of using uniform high power across all transmissions, the vehicle adjusts transmission parameters locally based on the predicted position, surrounding environment, and communication needs, thereby extending effective range only where necessary while minimizing unnecessary interference in other areas.
3Reliability
If transmission coordination is implemented to reduce interference, then communication reliability improves, but system complexity increases
Solution Approach 1:
The system implements self-service by enabling vehicles to autonomously determine their own future positions, calculate appropriate transmission characteristics, and announce their planned transmissions to the network. Each vehicle independently manages its own communication coordination without requiring complex centralized control, thereby improving reliability through self-organization while keeping individual device complexity manageable.
Data Source
AI summary
A method for a wireless communication from a first transportation vehicle to a road infrastructure station including determining the position of the first transportation vehicle, determining the distance of the transportation vehicle to the road infrastructure station, calculating a table containing predicted positions in space and/or time for the first transportation vehicle indicating the respective planned transmission characteristics for the future signal transmissions from the first transportation vehicle to the road infrastructure station at the predicted positions, transmitting the table to the surrounding transportation vehicle or to a network management station, evaluating the table in the surrounding transportation vehicle or the network management station, and adjusting the transmissions from the surrounding mobile station so that interference between the planned signal transmissions of the first transportation vehicle and the surrounding mobile station is reduced.