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Efficient Time Synchronization in a Wireless Sensor Network by Adaptive Value Tracking

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Academic year: 2021

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Figure

Fig. 1. Successive reactions of the sensor node u (a, b, and c, respectively) upon receiving successive synchronization messages carrying a greater sequence number than seq u from its neighbor v
Fig. 2. Interaction between an AVT and its environment. The adaptive value tracking process starts with an initial value v 0 and includes several cycles of search iteration: e.g., (1) the AVT proposes a value v t to its environment, (2) the environment sen
Fig. 4. Bounds on the distance to objective value for times t = 10, 15,20, 50, 100 as a function of the increase factor λ incr
Fig. 5. Testbed setup for the experiments: 20 MICAz sensor nodes (incuding the reference node of the time synchronization protocol), a query broadcaster node that periodically transmits query packets, a base station that collects and transfers logical cloc
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