scholarly journals Underwater Wireless Sensor Networks: A Review of Recent Issues and Challenges

2019 ◽  
Vol 2019 ◽  
pp. 1-20 ◽  
Author(s):  
Khalid Mahmood Awan ◽  
Peer Azmat Shah ◽  
Khalid Iqbal ◽  
Saira Gillani ◽  
Waqas Ahmad ◽  
...  
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Access Control ◽  
Propagation Delay ◽  
Wireless Sensor ◽  
Media Access Control ◽  
Underwater Sensor Networks ◽  
Underwater Wireless Sensor Networks ◽  
Media Access ◽  
Limited Bandwidth

Underwater Wireless Sensor Networks (UWSNs) contain several components such as vehicles and sensors that are deployed in a specific acoustic area to perform collaborative monitoring and data collection tasks. These networks are used interactively between different nodes and ground-based stations. Presently, UWSNs face issues and challenges regarding limited bandwidth, high propagation delay, 3D topology, media access control, routing, resource utilization, and power constraints. In the last few decades, research community provided different methodologies to overcome these issues and challenges; however, some of them are still open for research due to variable characteristics of underwater environment. In this paper, a survey of UWSN regarding underwater communication channel, environmental factors, localization, media access control, routing protocols, and effect of packet size on communication is conducted. We compared presently available methodologies and discussed their pros and cons to highlight new directions of research for further improvement in underwater sensor networks.

Media Access Control in Wireless Sensor Networks using Priority Index

2017 ◽  
Vol 5 (2) ◽  
pp. 416 ◽  
Author(s):  
Mallanagouda Patil ◽  
Rajashekhar C. Biradar
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Access Control ◽  
Wireless Sensor ◽  
Media Access Control ◽  
Underwater Sensor Networks ◽  
Media Access ◽  
Slot Allocation ◽  
Priority Index ◽  
Message Length

As the nodes in Wireless Sensor Networks (WSNs) have limited power, energy conservation is essential at different layers of the protocol stack to prolong lifetime. In our previous work, ”Priority based slot allocation for media access in wireless sensor networks” (PSAWSN), probability based priority scheme is used to allocate slots to competing nodes. Limitations of this work include 1) It does not handle dynamic and variable slot allocation based on varying requirements of nodes. 2) Error control is not taken into account. To overcome these limitations, we propose a Medium Access Control scheme using Priority Index (MACPI) that generates Priority Index (PI) to allocate varying slots based on parameters: message length (ML), node energy (NE), number of requests (NR) and message urgency (MU). Models have been de- signed for all these parameters and an expert system is proposed that makes decisions based on collective knowledge of these parameters. Analysis and simulation results for various message sizes and error conditions show that there is an improvement in terms of energy efficiency, optimal message length and throughput compared to the ”Reliable data deliveries using packet optimization in multi-hop underwater sensor networks”(RDPSN).

scholarly journals Virus Propagation in Wireless Sensor Networks with Media Access Control Mechanism

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Lurong Jiang ◽  
Qiaoyu Xu ◽  
Hangyi Pan ◽  
Yanyun Dai ◽  
Jijun Tong
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Access Control ◽  
Control Mechanism ◽  
Wireless Sensor ◽  
Media Access Control ◽  
Media Access ◽  
Virus Propagation ◽  
Suppression Effect ◽  
The Media

In wireless sensor networks, network security against virus propagation is one of the challenges with the applications. In severe cases, the network system may become paralyzed. In order to study the process of virus propagation in wireless sensor networks with the media access control mechanism, this paper uses the susceptible-infectious-removed (SIR) model to analyze the spreading process. It provides a theoretical basis for the development of virus immune mechanisms to solve network virus attack hidden dangers. The research shows that the media access control (MAC) mechanism in the wireless sensor network can inhibit the process of virus propagation, reduce the network virus propagating speed, and decrease the scale of infected nodes. The listen/sleep duty cycle of this mechanism will affect the suppression effect of virus propagation. The smaller the listen/sleep duty cycle, the stronger the suppression effect. Energy consumption has a peak value under specific infection probability. Meanwhile, it is also found that the spreading scale of the virus in wireless sensor networks can be effectively inhibited by the MAC mechanism.

Sign in / Sign up

Export Citation Format

Share Document