Virtual Access Points for Vehicular Networks

ABSTRACT This paper introduces the concept of Virtual Access Points (VAPs) for wireless Vehicular Ad-hoc Networks (VANETS). This new technique allows data dissemination among vehicles, thus extending the reach of roadside access points to uncovered road areas. Each vehicle that receives a message from an Access Point (AP) stores this message and rebroadcasts it into non covered areas. This extends the network coverage for non time critical messages. The VAP role is transparent to the connected nodes, and designed to avoid interference since each operates on a bounded region outside any AP. The experiments show the presented mechanism of store and forward at specific positions present a gain, in term of all the evaluated parameters

System for 802.11 connectivity at high speed

Measurements and ongoing research have shown that WLAN connection for moving vehicles is feasible. However none of the previous work suggests a solution addressing a complete array of the challenges in vehicular WLAN communications. To amend this we designed a system that provides wireless connection roaming at high velocities transparent to user level applications, and does not impose additional requirements to existing infrastructures. It offers simple deployment, security, and scalability. It remains efficient under ­ intermittent connectivity conditions and supports heterogeneous network mediums for increased robustness

PEGASUS: 802.11 connectivity at high speed

Measurements and ongoing research have shown that WLAN connection for moving vehicles is feasible. However none of the previous works suggests a solution addressing a complete array of the challenges in vehicular WLAN communications. Our system, PEGASUS amends this by providing wireless connection roaming at high velocities. To the best of our knowledge, it is the first system that operates over “in situ” wifi networks, while at the same time offers transparency to user level applications by allowing a single IP address per user, and does not impose additional requirements to existing infrastructures. PEGASUS offers simple deployment, improved scalability, and is the first able to operate over secure “in situ” networks. It remains efficient under intermittent connectivity conditions and supports heterogeneous network mediums for increased robustness