On the scalability of cooperative time synchronization in pulse-connected networks

  • Authors:
  • An-Swol Hu;Sergio D. Servetto

  • Affiliations:
  • School of Electrical and Computer Engineering, Cornell University, Ithaca, NY;School of Electrical and Computer Engineering, Cornell University, Ithaca, NY

  • Venue:
  • IEEE/ACM Transactions on Networking (TON) - Special issue on networking and information theory
  • Year:
  • 2006

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Abstract

The problem of time synchronization in dense wireless networks is considered. Well-established synchronization techniques suffer from an inherent scalability problem in that synchronization errors grow with an increasing number of hops across the network. In this work, a model for communication in wireless networks is first developed, and then the model is used to define a new time synchronization mechanism. A salient feature of the proposed method is that, in the regime of asymptotically dense networks, it can average out all random errors and maintain global synchronization in the sense that all nodes in the multihop network can see identical timing signals. This is irrespective of the distance separating any two nodes.