A Review on Various Approaches of Data Security and Communication in VANET

VANET is vehicular Ad-hoc network which is used for intelligent transport system for the drivers the ad-hoc network is used to transmit various types of message over the network. Safety message has to transmit for the security reasons on the vehicle and road transportation various routing protocols have been utilized for the purpose of message transmission. GPRS, AODV, DSR, PUMA these are various routing protocol utilizes for message transmission vanet scenario is used for mainly V2V and V2R purposes. Due to low bandwidth safety messages have been get congestion and information transmitted get loss. This information loss causes various problems in VANET that cause accidents, miss-communication between sharing information from V2V and V2R. To overcome this issue cognitive radio bandwidth can be utilize for data transmission by channel sensing and message can be transmit through cognitive radio channels.

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