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Software support for clock synchronization over IEEE 802.11 wireless LAN with open source drivers

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3 Author(s)
Aneeq Mahmood ; Institute for Integrated Sensor Systems, Austrian Academy of Sciences, Viktor Kaplan Straße 2, 2700 Wiener Neustadt, Austria ; Georg Gaderer ; Patrick Loschmidt

Between the wired and the wireless world a synchronization gap in terms of accuracy obviously exists due to the different possibilities of the technologies. This paper investigates means to access WLAN functionality in order to gain system-wide synchronization between access points and clients in order to establish a common notion of time in IEEE 802.11 systems. For this, a novel approach is presented, which uses beacons to transparently transport timing information even in high-loaded wireless LAN networks. Using the presented approach jitter accuracies in the microsecond range can be reached using the open Unix WLAN driver interfaces like madwifi or ath5k.

Published in:

2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication

Date of Conference:

Sept. 27 2010-Oct. 1 2010