Abstract
VANETs (Vehicular Ad-hoc Networks) offer diversity of appealing applications. A lot of applications offered by VANETs depend upon the propagation of messages from one vehicle to another vehicle in the network. Several algorithms for useful broadcasting of safety/ warning messages in the network have been presented by different researchers. Vehicles on roads are increasing day by day. Due to this increased number of vehicles and especially during the crest hours, when the networks become very dense, dissemination of the messages blindly in the network causes problems like packet collisions, data thrashing and broadcast storming. In this research, a relative speed based waiting time algorithm has been presented for avoiding broadcast storming problem in the VANETS especially in dense environment. This proposed algorithm calculates the waiting time for each vehicle after receiving the safety/ warning messages according to the relative speed of the vehicles, the distance between the vehicles and range of vehicles. The results show that the proposed relative speed based algorithm is better than already existing algorithms like blind flooding and dynamically broadcasting waiting time algorithm which uses number of neighbors and distance between the vehicles for calculating the waiting time.
Highlights
VANETs are Ad-hoc networks for vehicles on roads
VANETs fall under the broader category of ITS (Intelligent Transportation Systems)
By raising the repetitions enhanced reliability has been accomplished at charge of enhanced transmissions that can direct towards a flooded network. In both schemes i.e. Restricted-Mobility-Based protocol has been used in replacement of ordinary flooding protocols used for broadcasting. These researches by the authors concerning the broadcast of safety/ warning messages between the vehicles on road has paid attention to the problems like medium contention, data packet collisions and broadcast storming etc
Summary
These networks are temporary networks created for small amount of time since vehicles are moving at a rapid speed These networks are used to provide safety on road by transmitted information from other vehicles or infrastructure. It can provide high scalability and has better communication range as compared to Bluetooth and Wi-Fi devices This technology can help in eliminating redundancy of safety messages being broadcasted, because it works in two different modes i.e. beacon mode and non-beacon mode that can facilitate the traffic in random directions. Some researches have shown that ZigBee works well with moving objects like vehicles even if traffic is congested Since these wireless modules work in outdoor environment, it is important to use a technology which can sustain extreme weather conditions like snowfall and torridity.
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