Licence-exempt wireless communication systems

Abstract

There is growing international interest in providing users with broadband wireless connectivity using licence-exempt networks rather than next generation licenced ones. This is a potentially disruptive trend, but because these systems are fundamentally different, it is still very unclear how significant this potential disruption is likely to be. Consequently, the aim of this paper is to overview the capabilities of the technologies typically used in licence-exempt systems and to then consider their potential performance limitations within the context of designed and randomly deployed Wi-Fi networks for different deployment densities.

Future management of spectrum

“…Developing more spectrally efficient technologies for usage in the licence-exempt domain has therefore become one of the most challenging research objectives in wireless communications [8]. This task requires considerable understanding of how heterogeneous devices, with diverse time and QoS requirements, co-operate in a distributed environment in optimally utilising the available spectrum.…”