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Dedicated Short Range Communication
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A vehicular ad hoc network ( VANET ) uses cars as mobile nodes in a manet to create a mobile network. A VANET turns every participating car into a wireless router or node, allowing cars approximately 100 to 300 metres of each other to connect and, in turn, create a network with a wide range. As cars fall out of the signal range and drop out of the network, other cars can join in, connecting vehicles to one another so that a mobile Internet is created. It is estimated that the first systems that will integrate this technology are police and fire vehicles to communicate with each other for safety purposes.
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Fast Broadcasting
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We have developed a solution that allows vehicles in a car platoon to dynamically estimate their transmission range and to exploit this information to efficiently propagate a broadcast message with as few hops (and transmissions) as possible. In essence, the farthest vehicle in the transmission range of a message sender/forwarder will be statistically privileged in becoming the next (and only) forwarder.
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NS SIMPLE WIRELESS
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We are going to simulate a very simple 2-node wireless scenario.The topology consists of two mobilenodes, node_(0) and node_(1). The mobilenodes move about within an area whose boundary is defined in thisexample as 500mX500m. The nodes start out initially at two oppositeends of the boundary. Then they move towards each other in the firsthalf of the simulation and again move away for the second half. A TCP connection is setup between the two mobilenodes. Packets are exchangedbetween the nodes as they come within hearing range of one another. Asthey move away, packets start getting dropped.
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