If you have not read my earlier post on SCaaS, then check this out. If you have no idea what Network Function Virtualization (NFV) is, check this out.
In a recent presentation in CW, Interdigital suggested that they are working on some ideas where they can virtualize the small cells network in such a way to have multi-tenancy (multiple operators sharing pool of small cells resources). Here is the complete presentation embedded. Let me know what you think.