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SUMMARY: Optimal Wireless LAN Channel Selection Without Communication - Do
 uglas Leith\,  Hamilton Institute
DTSTART:20070426T153000Z
DTEND:20070426T163000Z
UID:TALK7275@talks.cam.ac.uk
CONTACT:Wenjun Hu
DESCRIPTION:We consider how a group of wireless access-points can self-con
 figure their channel choice so as to avoid interference between one anothe
 r. We make the observation that message passing or other communication bet
 ween access points is not necessary\, although it is a feature of almost a
 ll published channel allocation algorithms. We argue that this observation
  is of key practical importance as\,  \nexcept in special circumstances\, 
 interfering WLANs need not all lie in the same administrative domain and/o
 r may be beyond wireless communication distance (although within interfere
 nce distance). The feasibility of the communication-free paradigm is demon
 strated via a new class of decentralized algorithms that are simple\, robu
 st and provably correct for arbitrary interference graphs (including with 
 channel dependent interference). The algorithm requires only standard hard
 ware and we demonstrate its effectiveness via experimental measurements.
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Builiding
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