scholarly journals A Two-Phase Time Synchronization-Free Localization Algorithm for Underwater Sensor Networks

Sensors ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 726 ◽  
Author(s):  
Junhai Luo ◽  
Liying Fan
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Underwater Sensor Networks ◽  
Localization Algorithm ◽  
Two Phase ◽  
Phase Time

scholarly journals Two-Phase Time Synchronization-Free Localization Algorithm for Underwater Sensor Networks

2017 ◽  
Author(s):  
Junhai Luo ◽  
Liying Fan
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Sensor Nodes ◽  
Second Phase ◽  
Underwater Sensor Networks ◽  
Localization Algorithm ◽  
Two Phase ◽  
Phase Time ◽  
Anchor Nodes ◽  
Range Free

Underwater Sensor Networks (UWSNs) can enable a broad range of applications such as resource monitoring, disaster prevention, and navigation-assisted. It is especially relevant for sensor nodes location in UWSNs. Global Positioning System (GPS) is not suitable for using in UWSNs because of the underwater propagation problems. Hence some localization algorithms based on the precise time synchronization between sensor nodes have been proposed which are not feasible for UWSNs. In this paper, we propose a localization algorithm called Two-Phase Time Synchronization-Free Localization Algorithm (TP-TSFLA). TP-TSFLA contains two phases, namely, range-based estimation phase and range-free evaluation phase. In the first phase, we address a time synchronization-free localization scheme base on the Particle Swarm Optimization (PSO) algorithm to decrease the localization error. In the second phase, we propose a Circle-based Range-Free Localization Algorithm (CRFLA) to locate the unlocalized sensor nodes which cannot obtain the location information through the first phase. In the second phase, sensor nodes which are localized in the first phase act as the new anchor nodes to help realize localization. Hence in this algorithm, we use a small number of mobile beacons to help achieve location without any other anchor nodes. Besides, to improve the precision of the range-free method, an extension of CRFLA by designing a coordinate adjustment scheme is updated. The simulation results show that TP-TSFLA can achieve a relative high localization ratio without time synchronization.

Mobi-Sync: Efficient Time Synchronization for Mobile Underwater Sensor Networks

2013 ◽  
Vol 24 (2) ◽  
pp. 406-416 ◽  
Author(s):  
Jun Liu ◽  
Zhong Zhou ◽  
Zheng Peng ◽  
Jun-Hong Cui ◽  
Michael Zuba ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Underwater Sensor Networks

scholarly journals APE-Sync: An Adaptive Power Efficient Time Synchronization for Mobile Underwater Sensor Networks

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 52379-52389 ◽  
Author(s):  
Feng Zhou ◽  
Qi Wang ◽  
Guangjie Han ◽  
Gang Qiao ◽  
Zongxin Sun ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Underwater Sensor Networks ◽  
Power Efficient ◽  
Adaptive Power

DA-Sync: A Doppler-Assisted Time-Synchronization Scheme for Mobile Underwater Sensor Networks

2014 ◽  
Vol 13 (3) ◽  
pp. 582-595 ◽  
Author(s):  
Jun Liu ◽  
Zhaohui Wang ◽  
Michael Zuba ◽  
Zheng Peng ◽  
Jun-Hong Cui ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Underwater Sensor Networks ◽  
Synchronization Scheme

scholarly journals TS-MUWSN: Time Synchronization for Mobile Underwater Sensor Networks

2016 ◽  
Vol 41 (4) ◽  
pp. 763-775 ◽  
Author(s):  
Oriol Pallares ◽  
Pierre-Jean Bouvet ◽  
Joaquin del Rio
Keyword(s):  
Sensor Networks ◽  
Time Synchronization ◽  
Underwater Sensor Networks
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