Throughput of Underwater Wireless Ad Hoc Networks With Random Access: A Physical Layer Perspective

Songtao Lu, Zhengdao Wang, Zhaohui Wang, Shengli Zhou

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Due to frequency selectivity, long propagation delay caused by low speed of sound, and fast channel variation, multiple-access protocols that work well in terrestrial networks may not perform as well in underwater environment. We take a physical-layer approach and investigate frequency-selective underwater channels with uncoordinated multiple bursty transmissions. We first derive the statistical distribution of the interference as seen by a typical receiver, considering burstiness of interference transmissions, packet length, and spatial distributions of the interferers. We then derive expressions for the probability density functions of the frequency-dependent signal-to-interference-and-noise ratio (SINR). Expressions for the outage probability of a typical link between two nodes are obtained in the frequency-selective scenarios and the flat-fading special cases. The outage probabilities depend on the bursty transmission probability and the number of interfering transmitters. Previous expressions in the literature on outage probability for flat fading channels and interference-limited systems can be recovered as special cases of our results. Analysis on the throughput of network is provided. Optimization over the number of nodes and bursty transmission probability is performed to maximize the network throughput. Simulation results are presented, which validate the theoretical results and illustrate typical features of the interference in an underwater network.

Original languageEnglish (US)
Article number7145479
Pages (from-to)6257-6268
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number11
DOIs
StatePublished - Nov 1 2015

Bibliographical note

Publisher Copyright:
© 2002-2012 IEEE.

Keywords

  • Outage probability
  • bursty transmission
  • interference distribution
  • random access network
  • throughput
  • underwater acoustic communications

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