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PAX-MAC: A Low Latency Anycast Protocol with Advanced Preamble.

Tales Heimfarth1, João Carlos Giacomin1, Edison Pignaton de Freitas2

  • 1Department of Computer Science, Universidade Federal de Lavras, 37200-900 Lavras, Brazil.

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|January 8, 2020
PubMed
Summary
This summary is machine-generated.

PAX-MAC, a novel anycast protocol, reduces latency in wireless sensor networks (WSNs) by sending preambles ahead of data packets. This method significantly improves packet propagation speed while maintaining compatible energy efficiency.

Keywords:
MAC protocolanycastwireless sensor networks

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • Wireless sensor networks (WSNs) utilize duty-cycling to conserve energy, but this often increases end-to-end latency.
  • Cross-layer protocols employing anycast medium access control can mitigate latency in asynchronous duty-cycled WSNs.
  • Existing methods involve sending preambles to establish rendezvous with the next relay node.

Purpose of the Study:

  • To introduce PAX-MAC (Preamble Ahead Cross-layer Medium Access Control), a novel anycast protocol designed for low-latency packet propagation in duty-cycled WSNs.
  • To demonstrate how simultaneous preamble and data packet propagation can reduce latency.
  • To present a mathematical model for optimizing the distance between preambles and data packets based on packet size to minimize latency.

Main Methods:

  • Proposed PAX-MAC protocol featuring preambles that prospect the route ahead of the data packet.
  • Development of a mathematical model to determine the optimal distance between preambles and data packets, considering data packet size.
  • Comparative performance analysis of PAX-MAC against state-of-the-art asynchronous protocols through simulations.

Main Results:

  • PAX-MAC significantly outperforms existing asynchronous protocols in terms of latency across simulated scenarios.
  • The energy expenditure of PAX-MAC is comparable to the best-performing protocols.
  • In worst-case scenarios, PAX-MAC achieved a 20% latency reduction with only a 6% increase in energy consumption compared to the best alternative.

Conclusions:

  • PAX-MAC effectively reduces latency in asynchronous duty-cycled WSNs.
  • The protocol offers a favorable trade-off between latency reduction and energy consumption.
  • PAX-MAC presents a viable solution for applications requiring low-latency communication in energy-constrained WSNs.