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Vehicular ad hoc networks have been essentially developed to enhance driver safety. The authors believe that to efficiently implement this kind of systems a major problem needs to be solved: "How to rapidly disseminate the information among the vehicles?". At the wireless link level, a step has been already made in the 802.11 standard by accelerating the link setup (the IEEE 802.11p removes the need of association between stations before communicating). At the network level, one method that is considered to be very effective is broadcast. It is a technique that does not require a prior end-to-end connection establishment or maintenance. It is cheap and simple in terms of deployment and gives good performance thus its popularity.
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