SatelliteVANET-ICCCN09 - Pervasive Internet Access by...

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Pervasive Internet Access by Vehicles through Satellite Receive-only Terminals Baber Aslam, Ping Wang and Cliff C. Zou School of Electrical Engineering and Computer Science University of Central Florida Orlando, FL, USA {ababer, pwang, [email protected] Abstract —Ubiquitous Internet connectivity is very important in present environment. A lot of research has been done to extend Internet connectivity to vehicular ad hoc networks (VANETs). The biggest challenge to achieve this goal is the requirement of pervasive fully networked roadside infrastructure. This requirement is difficult to achieve especially during the initial deployment phase of vehicular networks and also in areas with scarce roadside infrastructure (such as along highways and in rural areas). This makes solutions that are solely dependent on roadside infrastructure impracticable to be implemented. Other solutions using cellular networks or symmetric satellite communication are either expensive or do not provide sufficient bandwidth. Further satellite communication suffers heavy losses in urban area and makes its use difficult in vehicular networks. We present a solution that complements the existing ones without requiring a fully networked roadside infrastructure. The solution uses satellite receive-only terminals and very few (widely spaced) roadside units to provide pervasive Internet connectivity. The solution is cost effective, incremental and practical. It can support TCP connection even when the uplink is interrupted for long durations of time. We present several different design options with varying degrees of error handling capabilities and different overheads and delays, which can be used according to the given environment. Keywords VANET; asymmetric satellite; Internet; low penetration; initial deployment; Land mobile satellite communication I. INTRODUCTION Communication and especially the connectivity to the Internet is the basic requirement of most modern productive environments. We spend a considerable time traveling from one point to another via vehicles; this time can be more productive if we are connected to the Internet. A lot of research has been done to bring the Internet to vehicles. To this end, three main approaches have been adopted: Internet through roadside infrastructure alone or through roadside infrastructure using vehicle to vehicle (V2V) communication [1 - 5], Internet through cellular network [1, 6, 7] and Internet through satellite (symmetric/asymmetric) [8, 9]. However, all three approaches have some challenges to deal with. The Internet access through roadside infrastructure requires pervasive roadside units (RSUs) to achieve connectivity, since the typical radial range of an RSU is 250m so we need an RSU every 400 to 500m. Further, these RSUs must all be connected to the Internet. Also, the installation, connection and maintenance of these RSUs will be quite expensive, and it may not be possible to achieve the desired connectivity, especially during the initial days of VANET deployment and along
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This note was uploaded on 08/25/2011 for the course EEL 5937 taught by Professor Staff during the Spring '08 term at University of Central Florida.

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SatelliteVANET-ICCCN09 - Pervasive Internet Access by...

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