Abstract
Efficient Data dissemination in VANET is still the challenge because of variable speed of vehicles, road conditions, frequent fragmentation etc. In this article a selective forwarding data dissemination scheme using exit time differences in vehicles for highway lanes scenario is proposed that focuses on the solution of broadcast storm, less coverage, transmission delay and reliable data delivery. Our approach is selecting multiple forwarding nodes to increase coverage in less delay. In this article road lanes concept is used to identify the moving node direction. Redundant regions and zones technique in proposed approach is reducing the processing of parameters at significant extents. Simulation of proposed approach is done using NS2 and SUMO. Output of implementation is compared with unidirectional flooding, KB_Selective, and LT_Selective techniques. Result analysis shown that the proposed technique is much efficient and it increases the rate of coverage up to 23%. Also it reduces the delay up to 18% in data delivery ratio. This methodology also improves the performance of system by increasing the throughput and reducing the collision rate in comparison with other methods.
Highlights
The networks of moving vehicles are used to disseminate important information among vehicles which includes safety related information, driving support, entertainment, and other mobile commercial services using wireless communication
VANET DATA DISSEMINATION As in Vehicle to Vehicle communication, vehicles are moving with variable speeds and directions, it is very difficult task to deliver data at proper time that is, the time when the data is valued for receiver for example there is no use of information received by a vehicle user regarding traffic support like jam due to road accident when vehicle already reached there and hang up in traffic [9]
Another problem that arise during VANET data dissemination is the disconnected networks problem which mostly occurs in areas having sparse traffic that is, less number of connected vehicles are available for information transfer [15]
Summary
The networks of moving vehicles are used to disseminate important information among vehicles which includes safety related information, driving support, entertainment, and other mobile commercial services using wireless communication. VANETs have a fast changing topology where nodes (vehicles) are moving at high and variable speeds in various directions Such networks are categorized in self-organising networks that can disseminate data with or without requiring any fixed infrastructure [2], [3]. When vehicles are connected to other vehicles it can transmit or receive the information or vehicles are able to exchange signal and related information in the form of packet transmission [4] There is another important fixed unit along road side named as Road Side Unit or RSU. RSU temporarily stores the details of all vehicles in its range This unit can connect to cloud, fog or other internet servers to send and receive information to and from other systems as per requirement.
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