A Pegasus over WiFi and WiMax Demo: Connectivity at high speeds

We present Pegasus, a system providing wireless connection roaming at high velocities over multiple interfaces. Our system operates over WiMax, as well as over “in situ” WiFi networks, while at the same time offering transparency to user level applications by allowing a single IP address per user, operating in a decentralized mode. One of our most important findings is that in a system where handoffs delay minimization is crucial, network information for user locations and used paths can be used for effective and balanced utilization of the available bandwidth. We exploit this by caching DHCP connections, which we store on the server, as well as selecting superior Access Points (AP) to use when clients handover. We use the our working testbed implementation on a simulation of mobility by cycling the client’s among APs, and derive the resulting bandwidth for large file downloading and HTTP connections.