EEMDS: An Effective Emergency Message Dissemination Scheme for Urban VANETs

Area of Science:

• Vehicular Adhoc Networks (VANETs)
• Road Safety Communications
• Wireless Networking

Background:

• Disseminating emergency messages (EMs) in urban Vehicular Adhoc Networks (VANETs) is crucial for road safety.
• Challenges include broadcast storms, high latency, packet loss, and network congestion, especially in dense urban environments and at intersections.

Purpose of the Study:

• To propose an Effective Emergency Message Dissemination Scheme (EEMDS) for urban VANETs.
• To enhance the reliability and efficiency of emergency message dissemination.
• To reduce communication overhead and network congestion.

Main Methods:

• Developed EEMDS based on novel mobility metrics, including direction angle and path loss factor, for cluster head selection.
• Introduced estimated link stability for selecting optimal relay vehicles.
• Focused on maintaining stable cluster structures to minimize communication overhead.

Main Results:

• EEMDS effectively reduces broadcast storms and communication congestion.
• The scheme ensures a stable cluster structure in dense urban VANETs.
• Simulation results demonstrate acceptable end-to-end delay and improved information coverage and packet delivery ratio compared to existing schemes.

Conclusions:

• EEMDS offers a robust solution for emergency message dissemination in urban VANETs.
• The proposed mobility metrics and link stability estimation enhance dissemination efficiency and reliability.
• The scheme contributes to improved road safety through timely and effective emergency communication.