Gradient Clock Synchronization in Sensor Networks
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2005-04
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Report
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Abstract
In this paper, we examine gradient clock synchronization in a system model that is typical for sensor networks: We assume message-delay uncertainties to be negligible, and communication to be infrequent. The gradient property requires the difference between any two network nodes' clocks to be bounded from above by a non-decreasing function of their distance. This means that every node has to be synchronized better to nearby nodes than to faraway nodes. We provide a lower bound for the achievable synchronization quality in our model and discuss its relation to an existing bound in a different model.
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219
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ETH Zurich, Computer Engineering and Networks Laboratory
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03429 - Thiele, Lothar (emeritus) / Thiele, Lothar (emeritus)