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2009
ACM

EZ-Flow: removing turbulence in IEEE 802.11 wireless mesh networks without message passing

8 years 4 months ago
EZ-Flow: removing turbulence in IEEE 802.11 wireless mesh networks without message passing
Recent analytical and experimental work demonstrate that IEEE 802.11-based wireless mesh networks are prone to turbulence. Manifestations of such turbulence take the form of large buffer build-up at relay nodes, end-to-end delay fluctuations, and traffic congestion. In this paper, we propose and evaluate a novel, distributed flow-control mechanism to address this problem, called EZ-flow. EZ-flow is fully compatible with the IEEE 802.11 standard (i.e., it does not modify headers in packets), can be implemented using off-the-shelf hardware, and does not entail any communication overhead. EZ-flow operates by adapting the minimum congestion window parameter at each relay node, based on an estimation of the buffer occupancy at its successor node in the mesh. We show how such an estimation can be conducted passively by taking advantage of the broadcast nature of the wireless channel. Real experiments, run on a 9-node testbed deployed over 4 different buildings, show that EZ-flow effectively...
Adel Aziz, David Starobinski, Patrick Thiran, Alae
Added 09 Nov 2010
Updated 09 Nov 2010
Type Conference
Year 2009
Where CONEXT
Authors Adel Aziz, David Starobinski, Patrick Thiran, Alaeddine El Fawal
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