Feasibility Analysis of Directional-Location Aided Routing Protocol for Vehicular Ad-hoc Networks Kamlesh Kumar Rana Computer Science & Engineering IIT (ISM) Dhanbad Jharkhand, India ranakamles@rediffmail.com Sachin Tripathi Computer Science & Engineering IIT (ISM) Dhanbad Jharkhand, India var1285@yahoo.com Ram Shringar Raw Computer Science & Engineering IGNTU Amarkantak Madhya Pradesh, India rsrao08@yahoo.in Abstract—Vehicular Ad-hoc Network (VANET) is a multi-hop wireless ad-hoc network created by using mobile vehicles to transmit safety message for vehicle drivers. Since vehicles are mobile so they change their location frequently, therefore; robust data delivery is a challenging task in the VANET. Due to frequently network topology change characteristic, selection of a routing protocol in VANET is challenging task. In this paper performance of location-based routing protocols Directional- Location Aided Routing (D-LAR), Location-Aided Routing (LAR) and DIrectional Routing (DIR) are analyzed to decide best routing protocol for VANET. LAR protocol limits the route discovery area in the forward direction using GPS technology and DIR protocol uses direction information from the baseline drawn from the source and destination node. The D-LAR protocol uses concepts of the both LAR and DIR protocols. Using greedy forwarding approach D-LAR protocol selects next hop forwarding node in the forward direction of the communication range. Feasibility of D-LAR protocol has justified through simulation in NS2 using routing metrics such as node distribution at the border area of the communication range R, expected one hop distance ࡱ൫ࡺሺ࢔, ࢘ሻ൯ , expected hop counts E(H) between source and destination node, expected delay E(delay), routing overhead and packet loss. Through simulation work, it has shown D-LAR protocol performs better as compared to LAR and DIR protocol. Keywords-VANET; DSDLAR; DLAR; LAR; SD I. INTRODUCTION Vehicular Ad-hoc Network (VANET) is a self- organized and decentralized wireless ad-hoc network uses mobile vehicles to transmit data packets throughout the network. VANET can be widely applied in so many fields as emergency deployments and community networking. In VANET, power and adequate storage are not an issue because VANET use vehicles as a node instead of other devices and they have sufficient energy and power for data processing and storage. One of the most important characteristics of VANET is dynamic topology [1] where vehicles move at very high speed on the road due to this they can change their network topology changes rapidly. Due to highly dynamic nature, mobility model and location prediction play a very important role in designing of data dissemination in the network. In VANET all nodes are mobile therefore an efficient routing is a fundamental and challenging task. The usage of physical location information of the nodes improves the efficiency of routing techniques of VANET. Location information of the nodes in VANET mainly leads to reduce routing overhead and increases packet delivery rate [2]. Figure1. VANET communication architecture In VANET, routing protocols are required to transmit the data packet from a source node to destination node via a International Journal of Computer Science and Information Security (IJCSIS), Vol. 16, No. 4, April 2018 214 https://sites.google.com/site/ijcsis/ ISSN 1947-5500