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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Aligned Beacon Transmissions to Increase IEEE 802.11s Light Sleep Mode Scalability
verfasst von : Marco Porsch, Thomas Bauschert
Erschienen in: Advances in Communication Networking
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Abstract
In wireless mesh networks battery-powered devices rely on a sophisticated power save scheme to provide enduring network connectivity. Therefore, IEEE 802.11s defines different power save modes to reduce the energy consumption of Wi-Fi mesh nodes. The most common of these modes, light sleep mode, aims at conserving energy while maintaining mesh link performance. To achieve this, it relies on periodic receipts of corresponding peer nodes’ beacons. This approach makes it unsuitable for dense topologies where an increasing number of peer links leads to frequent wakeups and higher energy consumption. To overcome this issue we introduce a novel synchronization algorithm to minimize the overhead of scheduled beacon receipts. We evaluate the effectiveness of the algorithm using testbed measurements and a state model-based approach, in which we compare its performance with respect to energy efficiency with that of the standard’s synchronization algorithm.