This pilot stduy is aimed at design and validation of a cooperative spectrum sharing architecture using the PAWR COSMOS PAWR platform. COSMOS provides a unique capability for spectrum experiments since the area of coverage in uptown Manhattan has been designated by the FCC as an Innovation Zone with considerable flexibility for experimental deployments in various sub-6 Ghz and mmWave bands. The focus of this experiment is on evaluating occupancy sensing and channel access for multiple wideband spectrum segments (i.e., 3.7 – 4.2 GHz, 28 – 29 GHz and 57.05 – 71.00 GHz) with maximum channel bandwidth in excess of 2 GHz. The wideband nature as well as high directionality of these systems, renders most of the existing dynamic spectrum sharing techniques unsuitable. As a proof-of-concept, we plan to implement the dynamic spectrum system that uses a protocol-based “spectrum control plane” for coordination between multiple independent networks operating in the same region. The spectrum sharing algorithms used will learn and predict the usage of the spectrum of both cooperating and non-cooperating networks. The architecture enables both distributed peer-to-peer and hierarchical cloud-based models for coordination. This pilot experiment will also take advantage of the unique cross-domain SDN controlled radio over fiber optical capabilities in COSMOS to support low latency and high capacity cooperation across the independent front-haul networks.