Research Area:  Vehicular Ad Hoc Networks
The constantly changing network topology in a VANET is dependent on efficient routing techniques. The position of the nodes gets updated by transmitting the Hello packets which contain vital control information about the network topology. The Hello packets are usually transmitted by a flooding technique. Flooding may prove disastrous when there is a heavy load on the network. It also results in allowing an unwanted number of redundant messages to be circulated, which in turn increases the transmission overhead. Our proposed work uses the optimized link state routing (OLSR) protocol with minimum multipoint relays (MMPR) to minimize the effects of flooding and maximize the channel utilization. The proposed protocol focuses on enhancing the security of the transmission by ensuring that only a selected set of nodes participate in forwarding the Hello packets emanating from the source. Our proposed technique makes sure that only a minimal set of nodes are always responsible for transmission. This helps in authenticating the nodes responsible for transmission. Additionally, this also ensures that flooding and transmission are more controlled than a normal mobile network. The proposed technique focuses on the efficient usage of bandwidth by minimizing the hop count of the transmission. Controlled and effective transmission with effective channel utilization is the main objective of our proposed protocol. The results are simulated and are compared with a reactive protocol like AODV in order to gauge its performance. OLSR with MMPR shows a better throughput than AODV thus ensuring the effectiveness of the proposed protocol.
Author(s) Name:  M. Usha,B. Ramakrishnan
Journal name:  Wireless Personal Communications
Publisher name:  Springer
Volume Information:  volume 109, pages 271–295 (2019)
Paper Link:   https://link.springer.com/article/10.1007/s11277-019-06564-y