Categorization and Secure Scheduling of Data Packets for Improving the Efficiency of Data Downloading in Moving Vehicles

Vanets are the result of the envisioned Smart Transportation Systems. It allows various vehicles to communicate with each other and form network. Vanet is one application in which ad hoc networks are used at their full potential. In vanets vehicles can access store and route data to one another. Vehicles in vanets are connected to other networks with the help of RSUs(Road Side Units). Road side Units are like access points by which the vehicles can request new data. Vehicles can work in two different modes under vanet, relay vehicles and end vehicles. Relay vehicles are ones which actively route data through them to other vehicles and end vehicles are one which receive and use them. Therefore with the increasing amount of vehicles on the road, it is very important to regulate or provide a framework by which vehicles can transmit data between each other without any data loss or delay. Efficient methods are also required to allow access to a vehicle in a low density area. Because there may be eve situation when a particular vehicle may move to an area where there is no traffic or very low traffic. On of the most challenging issues is the changing architecture of the communicating vehicles which acts as nodes on vanet. Various scheduling schemes and data handling schemes have been proposed for effectively scheduling the resources and data through vanet. In this paper we propose a TDMA based data scheduling scheme which can categorize the data which is being transferred by the system and can work accordingly to the requirement for that data to be delivered effectively to the end vehicles. We also plan to employ mac based congestion control approach which can effectively handle heavy traffic load at places with high traffic.