Emergency Messaging for Car Accident in Vehicular Ad-hoc Network

Global positioning system is used to get the vehicle position and can be shared with other nodes in the network. The sparse vehicle traffic leads to network fragmentation, is challenging task for safety application. In case of emergency not all the vehicle get affected in network so broadcasting of alert packet is not feasible rather it has to be multicast, but defining the list of node for multicast is challenging task as every vehicle cannot hold the location information of the entire vehicle in the network. Calculating the list of relative vehicles position is depending on the travelling direction, bearing angle and distance. Road side unit manage all the vehicle information and detect the failure vehicle and calculate detail of the vehicles get affected by the failure vehicle using the geo positioning and multicast alert packet to identified vehicles. This will narrow down broadcasting scenario and prevent the traffic conjunction.