Iris – the reconfigurable radio testbed at Trinity College Dublin provides virtualized radio hardware to support the experimental investigation of the interplay between radio capabilities and networks. Our facility pairs underlying flexible radio and computations resources with various hypervisors in the form of software radio frameworks to realize various research and testing configurations. We employ 16 ceiling mounted USRP N210s equipped with SBX daugtherboards, reaching frequencies between 40 MHz and 4 GHz, as underlying radio resources. These platforms are connected to a private computational cloud, allowing us to deploy an array of computational environments. To expose the functionality of these platforms for a variety of applications, we employ a variety of radio hypervisors, each with different capabilities and organized into the two categories of open standards compliant and blue sky oriented systems. The category of open standards compliant hypervisors includes frameworks based on open implementations of proven waveforms, such as the OpenBTS or Amarisoft frameworks. Blue sky oriented hypervisors, on the other hand, freely enable prototyping of wireless systems, as exemplified by GNURadio. Together these radio hypervisors enable the realization of heterogeneous radio platforms for composition into networks. Therefore, this facility is ideally equipped to investigate the combination of various physical layer approaches into coexisting or coherent networks.





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