Abstract
Localization has always been an essential application of underwater acoustic sensor networks (UASNs), which plays an important role in routing strategies design, node recycling, and so on. The complex ocean condition, prior infrastructure deployment, and time synchronization among beacons challenge the application of the UASN’s localization. To solve these problems, we propose a novel underwater acoustic sensor networks localization algorithm based on the virtual node assistance. The algorithm is classified into two parts based on the current marine environment, including Virtual node Assisted Static (VAS) localization algorithm and Virtual node Assisted Dynamic (VAD) localization algorithm. An auxiliary node, which does not directly participate in the localization, is deployed for virtual node setup, error measurement, and RSSI ranging. The GPS-equipped ship utilizes virtual node and geometry to realize the UASN’s localization without complicated deployment procedures and time synchronization. The simulation results show that our proposed algorithm can achieve the properties, including high localization coverage and small localization error as well as low communication overhead in the UASNs.
Highlights
Underwater Acoustic Sensor Networks (UASNs) have attracted many attentions due to their important applications in multiple fields such as environmental monitoring, offshore exploration, disaster prevention, and military surveillance [1]–[3]
Based on the types of beacon nodes, existing node localization algorithms can be categorized into two types: static beacon localization algorithm (Fixed beacon node localization algorithm) and mobile beacon localization algorithm
WORK In this paper, we propose an algorithm called VA for efficient UASNs localization under complex marine condition
Summary
Underwater Acoustic Sensor Networks (UASNs) have attracted many attentions due to their important applications in multiple fields such as environmental monitoring, offshore exploration, disaster prevention, and military surveillance [1]–[3]. In the process of UASNs localization, the mobile ship needs to deploy an auxiliary node, which is not directly involved in positioning and provides auxiliary conditions for virtual node setup, error measurement, and RSSI ranging. The processes of VAS and VAD are as follows: Firstly, the ship and the unlocated node need twice round-trip communication at different locations to calculate the distance through the time of arrival (TOA). 1) We utilize ship as a mobile beacon node to break the limitation of static beacon localization range, which avoids the complex process of time synchronization and mobile beacon path planning. 2) VA only needs one mobile beacon and a relatively random deployed auxiliary node It is not directly involved in localization, which simplifies the positioning process, reduces the communication overhead, and solves the beacon deployment problem.
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