Localization with a mobile beacon in underwater acoustic sensor networks

Area of Science:

• Marine Engineering
• Sensor Networks
• Acoustic Technology

Background:

• Accurate localization is critical for underwater acoustic sensor networks (UASNs), particularly with random node deployment.
• Traditional localization methods face challenges due to the difficulty of pre-deploying static beacon nodes in underwater environments.

Purpose of the Study:

• To propose a novel, range-free localization scheme utilizing a mobile beacon for enhanced accuracy and energy efficiency in UASNs.
• To address the limitations of static beacon deployment in underwater sensor networks.

Main Methods:

• A mobile beacon periodically broadcasts its location. Sensor nodes passively receive these messages for individual localization.
• The proposed Localization with a Mobile Beacon (LoMoB) method employs a weighted mean of potential locations, with weights derived from residual analysis.

Main Results:

• LoMoB enables sensor node localization without requiring inter-node communication, simplifying network deployment.
• The range-free approach combined with a mobile beacon offers a practical and efficient solution for underwater localization.

Conclusions:

• The LoMoB scheme provides a viable and effective method for localizing nodes in underwater acoustic sensor networks.
• Mobile beacon-based localization presents a promising direction for improving the performance of UASNs.