Paper Info
Title
Auto-configuration of 802.11n WLANs
Abstract
Channel Bonding (CB) combines two adjacent frequency bands to form a new, wider band to facilitate high data rate transmissions in MIMO-based 802.11n networks. However, the use of a wider band with CB can exacerbate interference effects. Furthermore, CB does not always provide benefits in interference-free settings, and can even degrade performance in some cases. We conduct an in-depth, experimental study to understand the implications of CB. Based on this study we design an auto-configuration framework, ACORN, for enterprise 802.11n WLANs. ACORN integrates the functions of user association and channel allocation, since our study reveals that they are tightly coupled when CB is used. We show that the channel allocation problem with the constraints of CB is NP-complete. Thus, ACORN uses an algorithm that provides a worst case approximation ratio of [EQUATION] with Δ being the maximum node degree in the network. We implement ACORN on our 802.11n testbed. Our experiments show that ACORN (i) outperforms previous approaches that are agnostic to CB constraints; it provides per-AP throughput gains from 1.5x to 6x and (ii) in practice, its channel allocation module achieves an approximation ratio much better than [EQUATION].
Year
DOI
Venue
2010
10.1145/1921168.1921204
CoNEXT
Keywords
Field
DocType
channel allocation,channel allocation problem,approximation ratio,channel allocation module,cb constraint,adjacent frequency band,experimental study,worst case approximation ratio,channel bonding,wider band,network management,intrusion detection
Channel bonding,Computer science,Testbed,Computer network,MIMO,Interference (wave propagation),Throughput,Channel allocation schemes,Auto-configuration,Radio spectrum,Distributed computing
Conference
Citations 
PageRank 
References 
21
1.14
14
Authors
6
Name
Order
Citations
PageRank
Mustafa Y. Arslan134018.06
Konstantinos Pelechrinis269248.45
Ioannis Broustis342529.27
Srikanth Krishnamurthy41919124.08
Sateesh Addepalli5150084.99
Konstantina Papagiannaki64094304.11