scholarly journals Hybrid Localization Approach for Underwater Sensor Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Pei-Hsuan Tsai ◽  
Rong-Guei Tsai ◽  
Shiuan-Shiang Wang
Keyword(s):  
Sensor Networks ◽  
Mobile Networks ◽  
Kinematic Model ◽  
Mobility Model ◽  
Communication Overhead ◽  
Underwater Sensor Networks ◽  
Localization Accuracy ◽  
Hybrid Localization ◽  
Localization Approach ◽  
Sensor Locations

Underwater Wireless Sensor Networks (UWSNs) are widely used to collect data in the marine environment. Location and time are essential aspects when sensors collect data, particularly in the case of location-aware data. Many studies on terrestrial sensor networks consider sensor locations as the locations where data is collected and focus on sensor positioning when sensors are fixed. However, underwater sensors are mobile networks and the sensor locations change continuously. Localization schemes designed for static sensor networks need to run periodically to update locations and consume considerable sensor power and increase the communication overhead; hence, they cannot be applied to UWSNs. This paper presents a hybrid localization approach with data-location correction, called Data Localization Correction Approach (DLCA), which positions data without additional communication overhead and power consumption on sensors. Without loss of generality, we simulate the ocean environment based on a kinematic model and meandering current mobility model and conduct extensive simulations. Our results show that DLCA can significantly reduce communication costs, while maintaining relatively high localization accuracy.

An Efficient Recursive Localization Approach for High-Density Wireless Sensor Networks

2019 ◽  
pp. 197-218
Author(s):  
Badia Bouhdid ◽  
Wafa Akkari ◽  
Abdelfettah Belghith ◽  
Sofien Gannouni
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Life Time ◽  
High Density ◽  
Wireless Sensor ◽  
Selection Strategy ◽  
Communication Overhead ◽  
Localization Accuracy ◽  
Reference Selection ◽  
Localization Approach

Although recursive localization approaches are efficiently used in wireless sensor networks (WSNs), their application leads to increased energy consumption caused by the important communication overhead necessary to achieve the localization task. Indeed, localization information coverage increases iteratively as new nodes estimate their locations and become themselves new reference nodes. However, the uncontrollable number evolution of such nodes leads, especially in high density networks, to wasted energy, important communication overhead and even impacts the localization accuracy due the adverse effects of error propagation and accumulation. This chapter proposes an efficient recursive localization (ERL) approach that develops a new reliable reference selection strategy to ensure a better distribution of the reference nodes in the network. ERL improves localization accuracy without incurring any additional cost. It allows conserving the energy and consequently prolonging the WSN life time.

An Adaptive Localization Approach for Wireless Sensor Networks Based on Gauss-Markov Mobility Model

2010 ◽  
Vol 36 (11) ◽  
pp. 1557-1568 ◽  
Author(s):  
Zhi ZHONG ◽  
Da-Yong LUO ◽  
Shao-Qiang LIU ◽  
Xiao-Ping FAN ◽  
Zhi-Hua QU
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Mobility Model ◽  
Wireless Sensor ◽  
Localization Approach

An Adaptive Localization Approach for Wireless Sensor Networks Based on Gauss-Markov Mobility Model

2010 ◽  
Vol 36 (11) ◽  
pp. 1557-1568 ◽  
Author(s):  
Zhi ZHONG ◽  
Da-Yong LUO ◽  
Shao-Qiang LIU ◽  
Xiao-Ping FAN ◽  
Zhi-Hua QU
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Mobility Model ◽  
Wireless Sensor ◽  
Localization Approach

scholarly journals A Two-Stage Localization Scheme with Partition Handling for Data Tagging in Underwater Acoustic Sensor Networks

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2135 ◽  
Author(s):  
Tariq Islam ◽  
Yong Kyu Lee
Keyword(s):  
Sensor Networks ◽  
Location Estimation ◽  
Sensor Nodes ◽  
Communication Overhead ◽  
Underwater Sensor Networks ◽  
Network Partitioning ◽  
Network Location ◽  
Reference Node ◽  
Relative Localization ◽  
Localization Scheme

Knowledge about the geographic coordinates of underwater sensor nodes is of primary importance for many applications and protocols of under water sensor networks (UWSNs) thus making localization of sensor nodes a crucial part of underwater network design. In case of mobile underwater sensor network, location estimation becomes challenging not only due to the need for periodic tracking of nodes, but also due to network partitioning caused by the pseudo-random mobility of nodes. Our proposed technique accomplishes the task of localization in two stages: (1) relative localization of sensor nodes with respect to a reference node at regular intervals during sensing operation. (2) Offline absolute localization of sensor nodes using absolute coordinates of the reference node and relative locations estimated during stage 1. As our protocol deals with mobile underwater sensor networks that may introduce network partitioning, we also propose a partition handling routine to deal with network partitions to achieve high localization coverage. The major design goal of our work is to maximize localization coverage while keeping communication overhead minimum, thus achieving better energy efficiency. Major contributions of this paper are: (1) Two energy efficient relative localization techniques, and (2) A partition handling strategy that ensures localization of partitioned nodes.

A LOW-COST RANGE-FREE LOCALIZATION SCHEME FOR THREE-DIMENSIONAL UNDERWATER SENSOR NETWORKS

2013 ◽  
Vol 05 (01) ◽  
pp. 1350005
Author(s):  
XIANLING LU ◽  
DEYING LI ◽  
YI HONG ◽  
WENPING CHEN
Keyword(s):  
Sensor Networks ◽  
Low Cost ◽  
Three Dimensional ◽  
Underwater Sensor Networks ◽  
Transmission Power ◽  
Localization Accuracy ◽  
Localization Scheme ◽  
Variable Transmission ◽  
Anchor Nodes ◽  
Range Free

Localization is one of the fundamental tasks for underwater sensors networks (USNs). It is required for data tagging, target detection, route protocols, and so on. In this paper, we propose an efficient low-cost range-free localization scheme for 3D underwater sensor networks (3D-LRLS) without any additional hardware infrastructure. In our scheme, each anchor node has variable transmission power levels. At first, the power levels of each anchor are decided by the Delaunay triangulation for the network space. Then, ordinary sensors listen to the beacons sent from the anchor nodes. Based on the beacon messages, each node calculates its location individually by a low computational complexity method. The extensive simulation results demonstrate that 3D-LRLS is efficient in terms of both localization ratio and localization accuracy.

scholarly journals A Stateless Opportunistic Routing Protocol for Underwater Sensor Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Seyed Mohammad Ghoreyshi ◽  
Alireza Shahrabi ◽  
Tuleen Boutaleb
Keyword(s):  
Sensor Networks ◽  
Routing Protocol ◽  
Performance Metrics ◽  
Local Density ◽  
Opportunistic Routing ◽  
Communication Overhead ◽  
Underwater Sensor Networks ◽  
Propagation Delays ◽  
Routing Performance ◽  
Efficiency And Reliability

Routing packets in Underwater Sensor Networks (UWSNs) face different challenges, the most notable of which is perhaps how to deal with void communication areas. While this issue is not addressed in some underwater routing protocols, there exist some partially state-full protocols which can guarantee the delivery of packets using excessive communication overhead. However, there is no fully stateless underwater routing protocol, to the best of our knowledge, which can detect and bypass trapped nodes. A trapped node is a node which only leads packets to arrive finally at a void node. In this paper, we propose a Stateless Opportunistic Routing Protocol (SORP), in which the void and trapped nodes are locally detected in the different area of network topology to be excluded during the routing phase using a passive participation approach. SORP also uses a novel scheme to employ an adaptive forwarding area which can be resized and replaced according to the local density and placement of the candidate forwarding nodes to enhance the energy efficiency and reliability. We also make a theoretical analysis on the routing performance in case of considering the shadow zone and variable propagation delays. The results of our extensive simulation study indicate that SORP outperforms other protocols regarding the routing performance metrics.

scholarly journals 3D Localization and Visualization of Sensor Nodes and Data Sensing in Underwater Wireless Sensor Networks

2019 ◽  
Vol 8 (12) ◽  
pp. 214-219
Keyword(s):  
Sensor Networks ◽  
Sensor Nodes ◽  
Underwater Sensor Networks ◽  
Network Simulator ◽  
Node Localization ◽  
Localization Accuracy ◽  
Network Information ◽  
3D Localization ◽  
3D Network

Underwater sensor networks (USNs) have many challenges in terms of determining network information. One of the challenges is determining 3D position coordinates of the sensor nodes in real-time in the aquatic environment. In this work, experiments have been conducted by deploying sensor nodes underwater at a shallow depth. As a case study, sensors have been used to sense water temperature and transmit to anchor (sink) node in a multi-hop fashion. Hardware experiments have been successfully conducted for localization and data transmission and results stored in industrial cloud platform smartcore for any further requirement. NS-3 with Aqua-3D - an Aqua-Sim network simulator has the required modules to visualize 3D Underwater Sensor Network. Simulation results show that 3D network visualization and node localization is obtained accurately. The Aqua-3D results are compared with the GPS coordinate values for localization accuracy

scholarly journals Time Evolution of Underwater Sensor Networks Coverage and Connectivity Using Physically Based Mobility Model

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Fatma Bouabdallah
Keyword(s):  
Sensor Networks ◽  
Time Evolution ◽  
Communication Protocols ◽  
Mobility Model ◽  
Sensor Nodes ◽  
Underwater Sensor Networks ◽  
Medium Access ◽  
Buoyant Force ◽  
Coverage And Connectivity ◽  
Networking Protocols

Underwater mobile acoustic sensor networks (UW-ASNs) require the design of new networking protocols due to fundamental differences with terrestrial wireless sensor networks. The performance of these protocols is highly impacted by the mobility of sensors, especially when they are freely floating. In such mobile UW-ASNs, nodes move with the water currents but are constrained by the gravitational weight of the sensor along with the water resistance and the buoyant force. A realistic mobility model that can reflect the physical movement of randomly scattered and freely floating sensor nodes under ocean currents provides clearer understanding of the communication challenges and hence helps conceiving efficient communication protocols. In this paper, we first propose an exhaustive physically inspired mobility model which meticulously captures the dynamics of underwater environments. We, then, study the resulting time evolution of network coverage and connectivity. Our objective is to provide the underwater network research community with a realistic mobility model that could be exploited in conceiving networking communication protocols such as routing, localization, and medium access. Namely, we show that the network mobility effect on coverage and connectivity is more significant in intermediately dense UW-ASNs. Less effect is recorded on the coverage and connectivity for low- and high-density UW-ASNs.

Sign in / Sign up

Export Citation Format

Share Document