Introducing a handshake for data dissemination using rateless codes in vehicular ad hoc networks

Abstract

AbstractData dissemination in vehicular networks is a notable problem because of the highly dynamic characteristics of these networks and the instability state of channels. Protocols that perform data dissemination based on MAC structure cannot provide reliable communication between vehicles. Protocols that use coding for data dissemination are reliable; however, they are either confronted with collision or not suitable for short time communication. In some situation, the node cooperation is low. In this paper, we extend the idea of data dissemination using rateless codes, DDRC. We introduce a proper handshake for data dissemination using rateless codes, HDDRC. This handshake is based on accelerated movement mathematical calculations. It calculates communication time duration between two members of handshake and sets a proper NAV (Network Allocation Vector). During NAV time, the channel is reserved and only handshake's members are allowed to communicate with each other. Therefore, handshake eliminates collision problem in the receiver node. Simulation results show that the protocol performance is improved by the vehicle's acceleration, which results in increasing the number of cooperating nodes. Comparing the two existing algorithms, DDRC and CORP, HDDRC causes the vehicles to receive messages in a shorter period of time and shorter traveled length of roads. Therefore, HDDRC improves the network performance. Copyright © 2015 John Wiley & Sons, Ltd.