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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3052
DTSTART:20130917T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260419T212028Z
LAST-MODIFIED:20130829T200715Z
LOCATION:4274 Chamberlin
SUMMARY:Scaling wireless network capacity with node density\, Chaos & 
 Complex Systems Seminar\, Xinyu Zhang\, Xinyu Zhang\, UW Department of
  Electrical and Computer Engineering
DESCRIPTION:Wireless spectrum is limited\, so packing more devices int
 o limited spectrum is the key to improving network capacity. Yet the c
 urrent infrastructure wireless networks are interference-limited. Thei
 r capacity does not scale with the density of infrastructure nodes (i.
 e.\, the access points\, or APs). This lack of scalability clearly mis
 matches the wireless traffic demand that is growing with user density.
  In this talk\, I will introduce a novel network architecture\, NEMOx\
 , that can scale wireless network capacity with AP density. NEMOx orga
 nizes a network into practical-size clusters\, each containing multipl
 e distributed APs (dAPs) that opportunistically synchronize and cooper
 ate with each other. Inter-cluster interference is managed with a dece
 ntralized channel-access algorithm\, which is designed to balance betw
 een the dAPs' cooperation gain and spatial reuse. Within each cluster\
 , NEMOx optimizes the power budgeting among dAPs and the set of users 
 to serve\, ensuring fairness and effective cancellation of cross-talk 
 interference. We have implemented and evaluated a prototype of NEMOx i
 n a software radio testbed\, demonstrating its throughput scalability 
 and multiple folds of performance gain over current wireless LAN archi
 tecture.
URL:https://www.physics.wisc.edu/events/?id=3052
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