Sensor network-based countersniper system
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
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
Estimating clock uncertainty for efficient duty-cycling in sensor networks
Proceedings of the 3rd international conference on Embedded networked sensor systems
Measurement, Control, and Communication Using IEEE 1588 (Advances in Industrial Control)
Measurement, Control, and Communication Using IEEE 1588 (Advances in Industrial Control)
SenQ: a scalable simulation and emulation environment for sensor networks
Proceedings of the 6th international conference on Information processing in sensor networks
Castalia: revealing pitfalls in designing distributed algorithms in WSN
Proceedings of the 5th international conference on Embedded networked sensor systems
A building block approach to sensornet systems
Proceedings of the 6th ACM conference on Embedded network sensor systems
On the scalability of routing integrated time synchronization
EWSN'06 Proceedings of the Third European conference on Wireless Sensor Networks
Design of an ultra low power MAC for a heterogeneous in-body sensor network
Proceedings of the 6th International Conference on Body Area Networks
A framework for processing complex queries in wireless sensor networks
ACM SIGAPP Applied Computing Review
Hi-index | 0.00 |
The efficiency of the time synchronization service in wireless sensor networks is tightly connected to the design of the radio, the quality of the clocking hardware, and the synchronization algorithm employed. While improvements can be made on all levels of the system, over the last few years most work has focused on the algorithmic level to minimize message exchange and in radio architectures to provide accurate time-stamping mechanisms. Surprisingly, the influences of the underlying clock system and its impact on the overall synchronization accuracy has largely been unstudied. In this work, we investigate the impact of the clocking subsystem on the time synchronization service and address, in particular, the influence of changes in environmental temperature on clock drift in highly duty-cycled wireless sensor nodes. We also develop formulas that help the system architect choose the optimal resynchronization period to achieve a given synchronization accuracy. We find that the synchronization accuracy has a two region behavior. In the first region, the synchronization accuracy is limited by quantization error, while int he second region changes in environmental temperature impact the achievable accuracy. We verify our analytic results in simulation and real hardware experiments.