An emergency packet forwarding scheme for V2V communication networks

Area of Science:

• Intelligent Transportation Systems
• Vehicular Ad Hoc Networks (VANETs)
• Road Safety

Background:

• Cooperative collision avoidance relies on timely warning message dissemination.
• Existing broadcast schemes face challenges with message redundancy and non-emergency traffic competition.
• High latency in warning message delivery can lead to chain collisions.

Purpose of the Study:

• To propose an effective warning message forwarding scheme for cooperative collision avoidance.
• To address the challenges of message redundancy and transmission competition in vehicular networks.
• To achieve low latency in emergency warning message delivery.

Main Methods:

• A two-way intelligent broadcasting method with an adaptable distance-dependent backoff algorithm is proposed.
• The algorithm considers vehicle locations to control broadcast and reduce redundant messages.
• It adaptively adjusts the contention window to compete with non-emergency transmissions.

Main Results:

• The proposed algorithm reduces the probability of rear-end crashes by 70% compared to previous methods.
• Intervehicle delay is significantly reduced, mitigating chain collision risks.
• End-to-end propagation delay of warning messages is decreased by 55%.

Conclusions:

• The developed intelligent broadcasting scheme effectively enhances safety in cooperative collision avoidance.
• The method significantly reduces critical delays, leading to fewer accidents.
• This approach offers a promising solution for reliable emergency warning dissemination in vehicular networks.