Distributed time synchronization in wireless sensor networks with coupled discrete-time oscillators

Document Type

Article

Publication Date

7-2-2007

Abstract

In wireless sensor networks, distributed timing synchronization based on pulse-coupled oscillators at the physical layer is currently being investigated as an interesting alternative to packet synchronization.In this paper, the convergence properties of such a system are studied through algebraic graph theory, by modeling the nodes as discrete-time clocks. A general scenario where clocks may have different free-oscillation frequencies is considered, and both time-invariant and time-variant network topologies (or fading channels) are discussed. Furthermore, it is shown that the system of oscillators can be studied as a set of coupled discrete-time PLLs. Based on this observation, a generalized system design is discussed, and it is proved that known results in the context of conventional PLLs for carrier acquisition have a counterpart in distributed systems. Finally, practical details of the implementation of the distributed synchronization algorithm over a bandlimited noisy channel are covered.

Identifier

34250801538 (Scopus)

Publication Title

Eurasip Journal on Wireless Communications and Networking

External Full Text Location

https://doi.org/10.1155/2007/57054

e-ISSN

16871499

ISSN

16871472

Volume

2007

This document is currently not available here.

Share

COinS