Optimal sampling strategies for minimum latency routing with imperfect link state

Saikat Guha, Don Towsley, Prithwish Basu, Howard Tripp, Timothy Freemany, Dmitriy Katz-Rogozhnikov, Robert Hancock, Jim Kurose

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Since dynamic wireless networks evolve over time, optimal routing computations need to be performed frequently on time-varying network topologies. However, it is often infeasible or expensive to gather the current state of links for the entire network all the time. We provide a thorough analytical characterization of the effect of various link-state sampling strategies operating under a limited sampling budget on the performance of the minimum-latency routing policy in a special class of dynamic networks. We show that for a two-state Markov link-dynamics model parameterized by probabilities p, q, if links are more likely to turn on than off at each time instant (p > q), a "depth-first" sampling strategy is optimal, whereas a "breadth-first" sampling strategy is optimal if links are more likely to turn off than on (p < 60; q)-under the Cut Through (CuT) latency model, i.e., when the packet-forwarding latency is negligible compared to the time scale of the link dynamics. We precisely characterize the optimal-latency spatial-sampling schedules for one-shot interrogation. We also present numerical simulation results on comparing various spatio-adseq-temporal sampling schedules under an overall sampling rate constraint, and initial results on comparisons of optimal schedules under a Store-and-Advance (SoA) packet-forwarding latency model.

Original languageEnglish (US)
Title of host publication2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012
Pages81-88
Number of pages8
Publication statusPublished - Oct 5 2012
Externally publishedYes
Event2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012 - Paderborn, Germany
Duration: May 14 2012May 18 2012

Publication series

Name2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012

Conference

Conference2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012
CountryGermany
CityPaderborn
Period5/14/125/18/12

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Control and Optimization
  • Modeling and Simulation

Cite this

Guha, S., Towsley, D., Basu, P., Tripp, H., Freemany, T., Katz-Rogozhnikov, D., ... Kurose, J. (2012). Optimal sampling strategies for minimum latency routing with imperfect link state. In 2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012 (pp. 81-88). [6260506] (2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, WiOpt 2012).