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Network Synchronization Issues in Multi-hop Networks: A Comprehensive Evaluation

This document explores unsynchronized networks' short-listen problem, introducing synchronization concepts and addressing hidden terminal issues in multi-hop networks. Patterns of redundancy and communication efficiency are also discussed, along with simulation results for TOSSIM-packet and implications at higher densities.

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Network Synchronization Issues in Multi-hop Networks: A Comprehensive Evaluation

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Presentation Transcript

  1. Maintenance without Synchronization • Issue arises with short-listen problem associated with unsynchronized networks • Instead of picking t from [0, t], distribution is used over [t/2, t] • What is meant by synchronization?

  2. Evaluation in Multi-hop Networks • Results for TOSSIM-packet simulation • At higher densities, does not match TOSSIM-bit  why? • Higher density  hidden terminal problem

  3. Hidden Terminal Problem • Why not CSMA/CA? • No RTS/CTS

  4. Redundancy • Redundancy “portion of messages heard in an interval that were unnecessary communication” • Redundancy = - 1 • Perfect redundancy = 0 • Trickle redundancy grows logarithmically • Why?

  5. Thank You!

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