Fine-grained network time synchronization using reference broadcasts
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Optimal transmission range and node degree for multi-hop routing in wireless sensor networks
Proceedings of the 4th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
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A major task of a wireless sensor network is energy-efficient, timely, and robust dissemination of sensor readings back to the sink node. The AIDA project [1] aims to create a new sensor network architecture, that uses antenna arrays of the distributed sensor nodes to create directional radio waves that can reach order-of-magnitude farther than individual antennas of the sensor nodes. This new network architecture, based on collaborative beamforming, drastically changes many aspects of the conventional networking stack. As part of the AIDA project, we are designing new energy-efficient MAC and routing protocols for the new, distributed beamforming physical layer, which effectively involves "many-sensors-to-many-sensors" for a single data packet transmission.