Licensed shared access by mobile networks: Proof-of-concept demonstration over ViSSA platform.

Licensed shared access (LSA) is one of the emerging modes of regulation for dynamic spectrum sharing management among incumbent wireless networks and secondary networks such as LTE mobile networks. This proof-of-concept demonstration of LSA exploits the Virtually Shared Spectrum Access (ViSSA) platform among various wireless networks and management entities. The ViSSA platform is an innovative integration of five parts by combining LTE small cells, emulators and management servers: i) a monitoring and management center with a spectrum repository that extends a license-exempt mode compliant geo-location database (GLDB/SR); ii) emulated incumbents that may register to GLDB/SR or directly access their spectrum; iii) a few LTE small cell networks of secondary accesses, each network having an LSA controller to communicate between GLDB/SR and its own network management; iv) feature-based sensing of incumbent signals emulated by a USRP; and v) implementation of LSRAI- and http-based communications among i) - iv) via Internet. On-site exhibition of ViSSA platform will demonstrate the novel LSA management of database-guided and sensing-based evacuation yielding to the incumbent. Demonstrations of re-activation of secondary LTE small cells in other available spectrum bands show the feasibility of completing evacuation and re-activation in 60 to 70 seconds.