• Stochastic modelling and performance analysis of cooperative HARQ in multi-cluster underwater acoustic sensor networks

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    • Keywords


      Cooperative HARQ; multi-hop relaying; underwater acoustic sensor networks

    • Abstract


      Cooperative hybrid automatic repeat request (C-HARQ) scheme based on multi-hop relaying has been adopted as an efficient strategy in underwater acoustic sensor networks (UASNs) to extend network coverage and to enhance the performance by utilizing spatial diversity gain. In this letter, we develop a stochastic model for multi-cluster transmissions in UASNs, considering the underwater-specific characteristics such as frequency-dependent signal attenuation, acoustic spreading, multi-path fading and underwater noises. From this generalized stochastic model, we derive accurate analytical expressions to analyse the end-to-end packet error rate (PER) and energy efficiency. Analytical results demonstrate that the C-HARQ scheme can significantly improve the performance of UASNs, especially with the increase in number of relay nodes. Analytical results are corroborated with extensive simulation studies.

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    • Author Affiliations



      1. Department of Electronics and Communication Engineering, National Institute of Technology Puducherry, Karaikal 609609, India
    • Dates

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