One-way delay estimation using network-wide measurements

Omer Gurewitz, Israel Cidon, Moshe Sidi

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

We present a novel approach for the estimation of one-way delays between network nodes without any time synchronization in the network. It is based on conducting multiple and simple one-way measurements among pairs of nodes, and estimating the one-way delays by optimizing the value of a global objective function that is affected by the overall network topology and not just by individual measurements. We examine two objective functions. The first intuitive choice is the least square error (LSE). Using a novel concept of delay-induced link probabilities, we develop a second objective function that is based on the maximum-entropy (ME) principle. Extensive numerical experiments show that both functions considerably outperform the common method of halving the round-trip delays. They also show that ME outperforms the commonly used LSE.

Original languageEnglish
Pages (from-to)2710-2724
Number of pages15
JournalIEEE Transactions on Information Theory
Volume52
Issue number6
DOIs
StatePublished - 1 Jun 2006
Externally publishedYes

Keywords

  • Delay estimation
  • Mathematical optimization
  • Maximum entropy
  • Network measurements
  • One-way delay

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