White Space Networking with Wi-Fi like Connectivity
Abstract
Networking over UHF white spaces is
fundamentally different from conventional Wi-Fi along three axes:
spatial variation, temporal variation, and fragmentation of the UHF
spectrum. Each of these differences gives rise to new challenges for
implementing a wireless network in this band. We present the design and
implementation of WhiteFi, the firstWi-Fi like system constructed on top
of UHF white spaces. WhiteFi incorporates a new adaptive spectrum
assignment algorithm to handle spectrum variation and fragmentation, and
proposes a low overhead protocol to handle temporal variation. WhiteFi
builds on a simple technique, called SIFT, that reduces the time to
detect transmissions in variable channel width systems by analyzing raw
signals in the time domain. We provide an extensive system evaluation in
terms of a prototype implementation and detailed experimental and
simulation results.
Papers
White Space
Networking with Wi-Fi like Connectivity, Paramvir Bahl, Ranveer
Chandra, Thomas Moscibroda, Rohan Murty, and Matt Welsh, in ACM SIGCOMM,
Association for Computing Machinery, Inc., August 2009 [PDF]