An Optimal ODAM-Based Broadcast Algorithm for Vehicular Ad-Hoc Networks

TL;DR

This paper introduces ODAM-C, an improved broadcast algorithm for VANETs that enhances packet delivery rates by optimizing forwarding strategies based on node angles and redundancy, validated through analysis and simulations.

Contribution

The paper presents a novel ODAM-C algorithm that improves VANET broadcast performance by addressing limitations of existing protocols with angle-based and redundancy mechanisms.

Findings

Increased packet delivery rate compared to existing protocols.

Effective reduction of packet loss through angle-based forwarding.

Enhanced redundancy improves delivery success ratio.

Abstract

Broadcast routing has become an important research field for vehicular ad-hoc networks (VANETs) recently. However, the packet delivery rate is generally low in existing VANET broadcast routing protocols. Therefore, the design of an appropriate broadcast protocol based on the features of VANET has become a crucial part of the development of VANET. This paper analyzes the disadvantage of existing broadcast routing protocols in VANETs, and proposes an improved algorithm (namely ODAM-C) based on the ODAM (Optimized Dissemination of Alarm Messages) protocol. The ODAM-C algorithm improves the packet delivery rate by two mechanisms based on the forwarding features of ODAM. The first distance-based mechanism reduces the possibility of packet loss by considering the angles between source nodes, forwarding nodes and receiving nodes. The second mechanism increases the redundancy of forwarding nodes to guarantee the packet success delivery ratio. We show by analysis and simulations that the proposed algorithm can improve packet delivery rate for vehicular networks compared against two widely-used existing protocols.