A Reliable Method for Disseminating Safety Information in Vehicular Ad Hoc Networks Considering Fragmentation Problem

Many of applications in vehicular ad hoc networks (VANET) are based on dissemination of information, so broadcasting is a fundamental service in these networks. Broadcasting is a difficult task since vehicular networks often lack continuous end-to-end connectivity and have large variations in node densities. In this paper we present a method that improves the reception rates of broadcast messages by overcoming problem of connectivity gaps. In our method, every forwarder of message when facing a gap sends small messages periodically. These methods are used to understand entrance of a new vehicle that can be selected as the next forwarder of message. We have evaluated the performance of proposed protocol in NS2 under various network conditions.

[1]  Maziar Nekovee,et al.  Reliable and Effcient Information Dissemination in Intermittently Connected Vehicular Adhoc Networks , 2007, 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring.

[2]  L. Campelli,et al.  Directional broadcast forwarding of alarm messages in VANETs , 2007, 2007 Fourth Annual Conference on Wireless on Demand Network Systems and Services.

[3]  Günter Hommel,et al.  Role-based multicast in highly mobile but sparsely connected ad hoc networks , 2000, 2000 First Annual Workshop on Mobile and Ad Hoc Networking and Computing. MobiHOC (Cat. No.00EX444).

[4]  Lars Wischhof,et al.  Self-Organizing Traffic Information System based on Car-to -Car Communication: Prototype Implementation , 2004 .

[5]  Abderrahim Benslimane.  Optimized Dissemination of Alarm Messages in Vehicular Ad-Hoc Networks (VANET) , 2004, HSNMC.

[6]  Günter Hommel,et al.  Role-based multicast in highly mobile but sparsely connected ad hoc networks , 2000, MobiHoc.

[7]  M. Gribaudo,et al.  Smart Broadcast of Warning Messages in Vehicular Ad Hoc Networks , 2005 .

[8]  Liviu Iftode,et al.  A Comparative Study of Data Dissemination Models for VANETs , 2006, 2006 3rd Annual International Conference on Mobile and Ubiquitous Systems - Workshops.

[9]  Wu-chi Feng,et al.  GPS-based message broadcasting for inter-vehicle communication , 2000, Proceedings 2000 International Conference on Parallel Processing.

[10]  Hao Wu,et al.  Analytical models for information propagation in vehicle-to-vehicle networks , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[11]  Ashish Agarwal,et al.  An Information Propagation Scheme for VANETs , 2005 .

[12]  Lars Michael Kristensen,et al.  Specification and performance evaluation of two zone dissemination protocols for vehicular ad-hoc networks , 2006, 39th Annual Simulation Symposium (ANSS'06).

[13]  Gihwan Cho,et al.  A Selective Flooding Method for Propagating Emergency Messages in Vehicle Safety Communications , 2006, 2006 International Conference on Hybrid Information Technology.

[14]  Eylem Ekici,et al.  Urban multi-hop broadcast protocol for inter-vehicle communication systems , 2004, VANET '04.

[15]  C. Borcea,et al.  STEID : A Protocol for Emergency Information Dissemination in Vehicular Networks ∗ , 2006 .

[16]  Takayuki Warabino,et al.  Broadcast methods for inter-vehicle communications system , 2005, IEEE Wireless Communications and Networking Conference, 2005.

[17]  Krishnendu Chakrabarty,et al.  Location-aided flooding: an energy-efficient data dissemination protocol for wireless-sensor networks , 2005, IEEE Transactions on Computers.

[18]  Patrick Thiran,et al.  Connectivity in ad-hoc and hybrid networks , 2002, Proceedings.Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies.