Underwater sensor networks (UWSNs) have attracted a lot of attention recently. Since data in UWSNs are transmitted by acoustic signals, the characteristics of a UWSN are different from those of a terrestrial sensor network. In other words, the high propagation delay of acoustic signals in UWSNs causes spatial-temporal uncertainty, and makes transmission scheduling in UWSNs a challenging problem.
An Adaptive MAC Protocol Based on Spatial and Temporal Correlation in Wireless Sensor Networks Jijun Zhao School of Information Science and Electrical Engineering, Hebei University of Engineering, Handan, China Email: [email protected] Zhongcheng Wei, Zhihua Li, Xiang Sun School of Information Science and Electrical Engineering, Hebei University of Engineering, Handan, China Email: ...
They provide environmental data with high spatio-temporal resolution at the expense of data quality using cheap sensor nodes in large numbers. MEMS microphones are usually the acoustic sensor of choice in WSN implementations due to their low cost, small form factor, and relatively low power consumption. These characteristics are critical in battery-operated sensor nodes where unit costs and ...
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MAC Protocol for Underwater Sensor Networks Youngtae Noh, ... Under these circumstances, Medium Access Control (MAC) protocols designed for terrestrial packet radio networks cannot be directly used because the propagation delay of acoustic signals is much greater than the packet transmission time (, transmit a 256bytesdata packet with the data rate of 50kbps over a 750m ...
In the design of media access control (MAC) mechanism in underwater acoustic sensor networks (UASNs), due to the propagation characteristic of low-speed underwater acoustic signals, it is necessary to solve the spatial-temporal uncertainty problem. In order to avoid the multi-user access conflict in underwater networks, reduce the energy cost and improve the throughput and fairness across the ...
Hence, in this paper, we propose a spatial-temporal MAC scheduling protocol, called ST-MAC, which is designed to overcome spatial-temporal uncertainty based on TDMA-based MAC …
In the design of media access control (MAC) mechanism in underwater acoustic sensor networks (UASNs), due to the propagation characteristic of low-speed underwater acoustic signals, it is necessary to solve the spatial–temporal uncertainty problem. In order to avoid the multi-user access conflict in underwater networks, reduce the energy cost and improve the throughput and fairness across ...
2021-01-15· Research Article A MAC Protocol of Concurrent Scheduling Based on Spatial-Temporal Uncertainty for Underwater Sensor Networks Xin Liu ,1,2 Xiujuan Du ,1,3 Meiju Li,1 Lijuan Wang ,1 and Chong Li1 1Computer Department, Qinghai Normal University, Xining 810008, China 2Computer Department, Qinghai Nationalities University, Xining 810007, China 3Academy of Plateau Science …
PDF | Employing contention-based MAC protocols in underwater sensor networks are typically costly. This is mainly due to the unique characteristics of... | Find, read and cite all the research you ...
2017-04-07· Integrated S-AODV and DEL-CMAC Algorithm of Spatio Temporal Cross-Layer in Sensor Network. Authors; Authors and affiliations; Shoba Chandra; Suresha Talanki; Kiran Kumari Patil ; Conference paper. First Online: 07 April 2017. 800 Downloads; Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 574) Abstract. Cooperative Medium Access …
The CSSTU-MAC protocol utilizes the characteristics of temporal-spatial uncertainty as well as long propagation delay in UWSNs to achieve concurrent transmission and collision avoidance.
PC-MAC: A Prescheduling and Collision-Avoided MAC Protocol for Underwater Acoustic Sensor Networks. Zhigang Jin,1 Shenyang Xiao,1 Yishan Su,1 and Yajing Li1. 1School of Electrical and Information Engineering, Tianjin University, Tianjin, China. Academic Editor: Bruno Andò. Received 21 Mar 2017. Accepted 19 Nov 2017.
2013-09-20· 2013-09-20· The program can display and visualize the values measured by Mac OS X in a large variety of fashions. Temperature Monitor tries to detect all sensors on as many Macintosh computer types as possible.
Request PDF | QLST - MAC: Q Learning Based Spatial -Temporal MAC Scheduling for Underwater Acoustic Sensor Networks | In this paper, a stateless Q learning based medium access control (MAC ...
Underwater sensor networks (UWSNs) are characterized by large energy consumption, limited power supply, low bit rate, and long propagation delay, as well as spatial-temporal uncertainty, which present both challenges and opportunities for media access control (MAC) protocol design. The time-division transmissions can effectively avoid collisions since different nodes transmit packets at ...
The media access control (MAC) protocol has become one of the study focuses in the field of UWSNs [5, 6]. Although UWSNs are a type of wireless sensor network, they are different from the ...
2020-03-30· Abstract: Different from the mechanism of medium access control (MAC) for the land-based sensor networks, the underwater acoustic sensor network faces problems such as high propagation delay, spatial-temporal uncertainty and high energy consumption. Orthogonal frequency division multiple access (OFDMA) is a channel access mechanism based on OFDM multi-carriers …
2016-09-21· 2016-09-22· iMac, Mac OS X (), Noisy Fan Posted on Sep 21, 2016 10:55 AM ... I'm hoping the intermittent nature of the fan noise (even though it's 99% of the time) may indicate the sensor is unseated. If that's the case there may be no parts required, just a few tools and a steady hand. The fact you suggest I've done my research reassures me I'm probably not missing something obvious, so …
Underwater Sensor Networks (UWSNs) have attracted a lot of attention recently. Since data in UWSNs are transmitted by acoustic signals, the characteristics of a UWSN are different from those of a terrestrial sensor network. In other words, the high propagation delay of acoustic signals in UWSNs causes Spatial-Temporal uncertainty, and makes transmission scheduling in UWSNs a challenging ...
Hence, in this paper, we propose a spatial-temporal MAC scheduling protocol, called ST-MAC, which is designed to overcome spatial-temporal uncertainty based on TDMA-based MAC scheduling for energy saving and throughput improvement.
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