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  1. Proceedings of the 2nd ACM SIGCOMM workshop on Programmable routers for extensible services of tomorrow (PRESTO '09)
  2. WiSwitcher: an efficient client for managing multiple APs
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A programmable overlay router for service provider innovation
A programmable, generic forwarding element approach for dynamic network functionality
Optimizing the BSD routing system for parallel processing
A model of configuration languages for routing protocols
Rapid service creation using the JUNOS SDK
CAFE: a configurable packet forwarding engine for data center networks
WiSwitcher: an efficient client for managing multiple APs
A hierarchical model for BGP routing policies
Router primitives for programmable active measurement
Design of a network service processing platform for data path customization
Energy-aware performance optimization for next-generation green network equipment
DECOR: DEClaritive network management and OpeRation

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WiSwitcher: an efficient client for managing multiple APs

Content Provider ACM Digital Library
Author Goma, Eduard Giustiniano, Domenico Rodriguez, Pablo Lopez, Alberto
Abstract There has been an increasing interest on designing a single-radio client for time-division access to multiple Access Points (APs) on different radio-channels. These works have focused mainly on different scheduling policies at the client-side to allocate the percentage of time to each AP. However the performance of these systems is limited by 1) the overhead to switch between APs on different radio-channels, 2) the jitter in the switching procedure, that modifies the expected percentage of time assigned by schedulers and 3) the packet losses caused by the switching. In this paper, we introduce WiSwitcher, a client able to connect to multiple APs that i) reduces the cost of switching down to the hardware switching time and ii) increases the stability of the percentage of time assigned by schedulers, even if the station transmits in saturation mode. We implement WiSwitcher over commodity hardware and show that it achieves high aggregate throughput over the connecting APs and seamlessly transmits TCP traffic under controlled scenarios. Finally, we characterize the dependency between the switching frequency at the WiSwitcher client and the packet losses in off-the-shelf APs.
Starting Page 43
Ending Page 48
Page Count 6
File Format PDF
ISBN 9781605584461
DOI 10.1145/1592631.1592642
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2009-08-21
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Multi-channel Tdma Wireless network Mac
Content Type Text
Resource Type Article
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