On the use of WiMAX and Wi-Fi in a VANET to provide in-vehicle connectivity and media distribution

[摘要] ENGLISH ABSTRACT: The recent emergence of ubiquitous wireless connectivity and the increasingcomputational capacity of modern vehicles have triggered immense interest in thepossibilities of vehicular connectivity. A plethora of potential applications for vehicularnetworks have been proposed in the areas of safety, traffic infrastructure management,information, and entertainment. The broad range of applications requires creative utilisationof the available wireless medium, using a combination of existing and novel wirelesstechnologies. In this research the evaluation of one such configuration is performed.Dedicated short range communication for safety applications is assumed, and the use of Wi-Fi and WiMAX for non-safety applications is evaluated. Little is known about the mediastreaming performance of these wireless technologies in realistic vehicular ad-hoc network(VANET) scenarios. Due to the extreme mobility and unpredictable environmental aspects ina real road environment, an empirical evaluation is performed and presented. Evaluation of amulti-vehicle to infrastructure (V2V2I) VANET, using Wi-Fi for the vehicle-to-vehiclecommunication and WiMAX for the vehicle to infrastructure (V2I) communication isexperimented. It is observed that Wi-Fi is unaffected by the vehicle speed; whenever nodesare within communication range, data gets transferred normally. A detailed characterisationof the network architecture is presented and the results show that a multitude of applicationscan be supported with this proposed network architecture.

[发布机构] Stellenbosch University