Jello: Dynamic Spectrum Sharing in Digital Homes

Wireless devices are being increasingly deployed in digital homes to deliver demanding applications such as highquality streaming media. To avoid costly interference, they can use frequency-agile hardware to detect and utilize unoccupied wireless spectrum ranges. The challenge is how to manage spectrum among a variety of heterogeneous consumer devices efficiently without expensive control hardware or disrupting ongoing transmissions. We develop Jello, a distributed dynamic spectrum access system based on noncontiguous OFDMA to provide robust, high-bandwidth communication for consumer wireless devices. We implement a Jello prototype on a 7-node GNU Radio testbed. In this Jello demo, we will run three parallel transmissions with timevarying loads. We show that Jello can significantly increase spectrum utilization while reducing media disruption.