A Cooperative Multi-Hop Location Verification for Non Line Of Sight (NLOS) in VANET

Localization and exchanged position information plays a big role in Vehicular Ad-Hoc Networks (VANET). Several network services and applications, such as safety messages, require location information. The data are exchanged between vehicles within their radio communication range. In real life implementation, direct communication can be interfered and blocked by obstacles on the road preventing two vehicles from directly communicating with each other and creating a state of Non Line of Sight (NLOS) between them. Thus, preventing them from exchanging proper data which will have an effect on the localization service integrity and reliability. Moreover, securing location information under NLOS is yet a challenge. In this paper we propose a cooperative location verification protocol between neighboring vehicles for a NLOS conditions in order to secure the localization services for VANET. Simulation results showed improvement in neighborhood awareness under NLOS condition which will help maintaining localization service integrity and reliability.