  Dense deployments of Small Cells are required to deliver the capacity
promised by 5G networks. In this paper we present SWAM, a system that builds on
commodity Wi-Fi routers with multiple wireless interfaces to provide a wireless
access infrastructure supporting multi-tenancy, mobility, and integrated
wireless access and backhaul. An infrastructure provider can deploy inexpensive
SWAM nodes to cover a given geographical area, and re-sell this capacity to
provide on-demand connectivity for Mobile Network Operators. Our main
contribution is the design of the SWAM datapath and control plane, which are
inspired by the overlay techniques used to enable multi-tenancy in data-center
networks. We prototype SWAM in an office wireless testbed, and validate
experimentally its functionality.
