Date Added: Sep 2010
Despite of findings that only 5.2% of the spectrum from 30 MHz to 3 GHz is utilized, there is much talk of an impending spectrum crisis. This is no contradiction - spectrum is inefficiently utilized, with some part of the spectrum being heavily used while others barely used. In this paper, the authors explore a simple high-level approach to the problem: to enable user mobility across networks and exploit all the capacity available. By doing so, they can create a better mobile network by stitching together existing ones spanning multiple wireless technologies. They briefly outline their exploratory foray into radio agnostic handover and discuss the various challenges ahead.