FreeBee: Cross-technology Communication via Free Side-channel
This video demo "FreeBee: Cross-technology Communication via Free Side-channel" is presented in Mobicom 2015. FreeBee generates side-channel between WiFi, Bluetooth, and ZigBee for inter-technology cooperation and coordination. It runs on COTS devices and does not consume additional bandwidth. The key concept of FreeBee
is to modulate symbol messages by shifting the timing of
periodic beacon frames already mandatory for wireless stan-
dards without incurring extra traffic. Such a generic cross-
technology design consumes zero additional bandwidth, al-
lowing continuous broadcast to safely reach mobile and/or
duty-cycled devices. A new interval multiplexing technique
is proposed to enable concurrent broadcasts from multiple
senders or boost the transmission rate of a single sender.
Theoretical and experimental exploration reveals that Free-
Bee offers a reliable symbol delivery under a second and
supports mobility of 30mph and low duty-cycle operations
of under 5%.
