Broadcasting in Connected and Fragmented Vehicular Ad Hoc Networks

Vehicular ad hoc networks (VANETs) are expected to be used for the dissemination of emergency warning messages on the roads. The emergency warning messages such as post crash warning notification would require an efficient multi hop broadcast scheme to notify all the vehicles within a particular area about the emergency. Such emergency warning applications have low delay and transmission overhead requirements to effectively transmit the emergency notification. In this paper, an adaptive distance based backoff scheme is presented for efficient dissemination of warning messages on the road. The proposed scheme adaptively selects the furthest vehicle as the next forwarder of the emergency message based on channel conditions. The detailed performance figures of the protocol are presented in the paper using simulations in the OPNET network simulator. The proposed protocol introduces lower packet delay and broadcast overhead as compared to standard packet broadcasting protocols for vehicular networks.

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Data Dissemination in Vehicular Networks

Wireless Technologies in Vehicular Ad Hoc Networks ◽

10.4018/978-1-4666-0209-0.ch013 ◽

2012 ◽

pp. 271-297

Author(s):

Nitin Maslekar ◽

Mounir Boussedjra ◽

Houda Labiod ◽

Joseph Mouzna

Keyword(s):

Ad Hoc Networks ◽

Intelligent Transportation Systems ◽

Vehicular Networks ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Data Dissemination ◽

Transportation Systems ◽

Communications Systems ◽

Effective Dissemination ◽

Hoc Networks

Vehicular ad hoc networks (VANETs) represent an important component necessary to develop Intelligent Transportation Systems. Recent advances in communications systems have created significant opportunities for a wide variety of applications and services to be implement in vehicles. Most of these applications require a certain dissemination performance to work satisfactorily. Although a variety of optimizations are possible, the basic idea for any dissemination scheme is to facilitate the acquisition of the knowledge about the surrounding vehicles. However, the dynamic nature of vehicular networks makes it difficult to achieve an effective dissemination among vehicles. This chapter provides an overview on those challenges and presents various approaches to disseminate data in vehicular networks.

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An Efficient Data Dissemination Scheme for Warning Messages in Vehicular Ad Hoc Networks

International Journal of Wireless Networks and Broadband Technologies ◽

10.4018/ijwnbt.2011100104 ◽

2011 ◽

Vol 1 (4) ◽

pp. 55-72 ◽

Cited By ~ 1

Author(s):

Muhammad A. Javed ◽

Jamil Y. Khan

Keyword(s):

Ad Hoc Networks ◽

Vehicular Networks ◽

Vehicular Ad Hoc Networks ◽

Ad Hoc ◽

Data Dissemination ◽

Packet Delay ◽

Network Simulator ◽

Warning Messages ◽

On The Road ◽

Hoc Networks

Vehicular ad hoc networks (VANETs) are expected to be used for the dissemination of emergency warning messages on the roads. The emergency warning messages such as post crash warning notification would require an efficient multi hop broadcast scheme to notify all the vehicles within a particular area about the emergency. Such emergency warning applications have low delay and transmission overhead requirements to effectively transmit the emergency notification. In this paper, an adaptive distance based backoff scheme is presented for efficient dissemination of warning messages on the road. The proposed scheme adaptively selects the furthest vehicle as the next forwarder of the emergency message based on channel conditions. The detailed performance figures of the protocol are presented in the paper using simulations in the OPNET network simulator. The proposed protocol introduces lower packet delay and broadcast overhead as compared to standard packet broadcasting protocols for vehicular networks.

Download Full-text