Optimal Wireless LAN Channel Selection Without Communication
Douglas Leith
We consider how a group of wireless access-points can self-configure
their channel choice so as to avoid interference between one
another. We make the observation that message passing or other
communication between access points is not necessary, although it
is a feature of almost all published channel allocation algorithms.
We argue that this observation is of key practical importance as,
except in special circumstances, interfering WLANs need not all lie
in the same administrative domain and/or may be beyond wireless
communication distance (although within interference distance). The
feasibility of the communication-free paradigm is demonstrated via a
new class of decentralized algorithms that are simple, robust and
provably correct for arbitrary interference graphs (including with
channel dependent interference). The algorithm requires only
standard hardware and we demonstrate its effectiveness via
experimental measurements.
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