Connection stability is important in vehicle-to-vehicle communication for applications that exchange messagesfor collision warning, cooperative driving, and other highurgency purposes. Many of the existing communication protocols for mobile ad-hoc networks assume the use of, portable gaming players, PDAs and other general-purpose devices, thus reducing the reliability of connection stability and communication. Therefore, greater efficiency can be expected by specializing systems for vehicle-to-vehicle communication using position information. To improve connection stability, we propose a method for constructing network groups according to lane position and evaluate the proposed method by simulation. We also describe a method of automatic assignment of IP addresses using IPv6 and a combination of network addresses defined for each lane and a specific host address for each vehicle.
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