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Summary: Taking the Sting out of Carrier Sense:
Interference Cancellation for Wireless LANs
Daniel Halperin
University of Washington
Thomas Anderson
University of Washington
David Wetherall
University of Washington
Intel Research Seattle
ABSTRACT
A fundamental problem with unmanaged wireless networks
is high packet loss rates and poor spatial reuse, especially
with bursty traffic typical of normal use. To address these
limitations, we explore the notion of interference cancella-
tion for unmanaged networks -- the ability for a single re-
ceiver to disambiguate and successfully receive simultane-
ous overlapping transmissions from multiple unsynchronized
sources. We describe a practical algorithm for interference
cancellation, and implement it for ZigBee using software ra-
dios. In this setting, we find that our techniques can re-
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