Results 11 to 20 of about 3,084 (253)

Optimal Deployment of Sensor Nodes Based on Performance Surface of Underwater Acoustic Communication

Sensors, 2017
The underwater acoustic sensor network (UWASN) is a system that exchanges data between numerous sensor nodes deployed in the sea. The UWASN uses an underwater acoustic communication technique to exchange data.
Sunhyo Kim, Jee Woong Choi
doaj   +2 more sources

High-Performance Iontronic Hydrogel Acoustic Sensor for Low-Frequency Underwater Sound Detection and Intelligent Recognition [PDF]

Research
The detection and identification of low-frequency underwater sounds remain challenging due to inefficient acoustic–mechanical–electrical coupling, which limits the conversion of low-frequency weak pressure fluctuations into stable electrical signals in ...
Jiawei Zhao, Honglei Zhou, Tongqiang Fu, Haijun Wang, Tangjia Zhang, Longqiu Li   +5 more
doaj   +2 more sources

Delay-Fluctuation-Resistant Underwater Acoustic Network Access Method Based on Deep Reinforcement Learning [PDF]

Sensors
The slow propagation speed of acoustic waves in water leads to significant variations and random fluctuations in communication delays among underwater acoustic sensor network (UASN) nodes.
Jinli Shi, Kun Tian, Jun Zhang
doaj   +2 more sources

Enhancing underwater sensor network security using QKD-enabled acoustic–optical hybrid communication [PDF]

Scientific Reports
Underwater Wireless Sensor Networks (UWSNs) function as essential systems which support naval defence operations, environmental monitoring, offshore industrial work and sea-depth exploration activities.
Srilekha Rajnarayanan, Tamilarasi Kathirvel Murugan, Logeswari Govindaraj, Smitha Gladius Theodore Solomon, Mohammed Aashik Fazuludeen   +4 more
doaj   +2 more sources

Design of underwater acoustic sensor communication systems based on software-defined networks in big data

International Journal of Distributed Sensor Networks, 2017
The application based on big data is an important development trend of underwater acoustic sensor networks. However, traditional underwater acoustic sensor networks rely on the hardware infrastructure.
Jianping Wang, Lijuan Ma, Wei Chen
doaj   +2 more sources

Study on Underwater Acoustic Sensor Network

Dianxin kexue, 2013
Nowadays, the study of the underwater acoustic sensor network（UASN）becomes the hotspot in the world, but there are some difficulties in controlling underwater conditions and the mobile sensor node.
Ming He, Qiuli Chen, Xuguang Ye, Jichuan Quan, Xiliang Chen   +4 more
doaj   +3 more sources

An adaptive network allocation vector timer-based carrier sense multiple access with collision avoidance medium access control protocol for underwater acoustic sensor networks

International Journal of Distributed Sensor Networks, 2017
Underwater sensor networks with acoustic communications are significantly challenged due to several unique characteristics, such as energy consumption, high propagation delay, and severely limited distance-dependent bandwidth.
Md Arifur Rahman, Youngdoo Lee, Insoo Koo   +2 more
doaj   +2 more sources

A Network Coding Based Hybrid ARQ Protocol for Underwater Acoustic Sensor Networks

Sensors, 2016
Underwater Acoustic Sensor Networks (UASNs) have attracted increasing interest in recent years due to their extensive commercial and military applications. However, the harsh underwater channel causes many challenges for the design of reliable underwater
Hao Wang, Shilian Wang
exaly   +2 more sources

An Adaptive OFDMA-Based MAC Protocol for Underwater Acoustic Wireless Sensor Networks

Sensors, 2012
Underwater acoustic wireless sensor networks (UAWSNs) have many applications across various civilian and military domains. However, they suffer from the limited available bandwidth of acoustic signals and harsh underwater conditions.
Issa M. Khalil, Yasser Gadallah, Mohammad Hayajneh, Abdallah Khreishah   +3 more
doaj   +2 more sources

Joint Channel and Power Assignment for Underwater Cognitive Acoustic Networks on Marine Mammal-Friendly

Applied Sciences, 2023
When marine animals and underwater acoustic sensor networks (UASNs) share spectrum resources, problems such as serious harm caused to marine animals by underwater acoustic systems and scarcity of underwater spectrum resources are encountered.
Libin Xue, Chunjie Cao
doaj   +1 more source