An Efficient Cross Layer Routing Protocol for Safety Message Dissemination in VANETS with Reduced Routing Cost and Delay Using IEEE 802.11p
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For successful message dissemination in urban vehicular ad hoc networks (VANETs) with reduced route cost and delay is challenging task due to high mobility of the vehicles. Existing cross-layer cooperative routing (CLCR) protocol in VANETs utilizes vast transmission power and increases route cost due to unnecessary broadcast of Hello messages in selecting relay nodes for packet routing. In this paper an enhanced CLCR (ECLCR) with IEEE 802.11p has been proposed, by introducing new mechanism: selecting appropriate relay nodes by calculating neighbor set ratio (NSR) using neighborhood knowledge to acquire more robust route for successful dissemination of packet, then adding a parameter to packet header such as mobility, which can store total network NSR for each route request packet to reduce delay. The performance of the newly proposed algorithm has been evaluated with network simulator-2.34 tool and compare with existing protocols under different conditions. Furthermore, an extensive simulation experiments have been carried out and it is observed that the proposed ECLCR using IEEE 802.11p standard outperforms over existing approaches.
KeywordsCross layer cooperative routing VANETs Relay estimation Average delay Route cost
Authors are very much thankful to both the editor and referee for giving valuable critical and precise comments/suggestions to improve the quality of this manuscript. Dr. D. Venkata Ratnam would like to express his thanks to the Department of Science and Technology, New Delhi, India for funding this research through SR/FST/ESI-130/2013(C) FIST program. The work of Dr. D. Venkata Ratnam is supported through F. 301/2013(SAII)/RA201416GEANP5585. Authors would like to thank Dr. I. A. Pasha, Professor and Head of the Department, Electronics and Communication Engineering, B V Raju Institute of Technology, Medak, Telangana for his consistent support.
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