| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 103 === Vehicular Ad-hoc Networks(VANETs) have many kinds of applications such as increasing driving safety, decreasing traffic congestion and offering better driving services.When the vehicle has a service request,it broadcast its request to roadside unit by broadcasting and register. However,when there are multiple road side units selectable, how to effectively pick out a road side unit in the network topology can have a stable connection environment has become an important issue.However,when there are multiple roadside units which can be selected,how to effectively pick out a road side unit which has a stable connection environment under the network topology has become one of an important issue.The traditional method, Flooding, provides a good reachability but it may causes “Broadcast Strom Problem”, resulting in bandwidth abusing.
Depend on if it can broadcasts the packets successfully that will affect the accuracy of road side unit which was selected in this study.Therefore, we propose the restricted flooding whcich ensures bidirectional broadcasting on any roads, such that it can be suitable for any scenarios. The simulations are conducted with network simulator NS2. The simulation results show that the proposed scheme can achieve high Packet Delivery Ratio.
|
|---|
