Supportive Data Scheduling and Broadcast through VANET using Batch Signature

Vehicular Ad-hoc network (VANET) is constructed with vehicles and roadside infrastructure. Vehicle location and speed information is collected continuously to manage the VANET communication. On-Board Unit (OBU) processes the data from the various sensors on the inside of the cars, and there are conditions of the vehicles. An on-board unit (OBU) is responsible for the communication with external network, such as with other vehicles and infrastructure. Road side Unit (RSU) is an infrastructure for the communication between the vehicles for sharing and information from different vehicles. The data transfer can be performed with vehicle (V2V) and vehicle-to-infrastructure (V2I). Opponents can track a vehicle by observing their communication and movement patterns. Privacy violation and anonymous communication are some security issues in VANET. Multi Hop broadcasting systems are for the dissemination of safety messages. Freight Forwarder node manages the data transfer process in multi-hop radio protocols. Freight Forwarder node selection process is carried out with reference to the waiting period details. Robust and fast forwarding (ROFF) protocol solves the unnecessary delay and collusion problems in data dissemination process. A freight forwarder candidate is allowed, the waiting time is inversely proportional to its priority forward. The empty space Distribution (ESD) bitmap describes the distribution of spaces between the vehicles. A freight forwarder candidate acquires its priority forward with the concept of the ESD-bitmap. Collisions are avoided by the control the wait time differences than the pre-defined limit. Keywords—Intelligent transportation systems (ITS), vehicular ad-hoc networks (VANET), multi-hop broadcasting