scholarly journals Approach to implementation of local navigation of mobile robotic systems in agriculture with the aid of radio modules

2020 ◽  
Vol 12 (2) ◽  
pp. 92-97
Author(s):  
Roman Iakovlev ◽  
Anton Saveliev
Keyword(s):  
Wireless Networks ◽  
Unmanned Aerial Vehicles ◽  
Data Transfer ◽  
Absolute Error ◽  
Robotic Systems ◽  
Wireless Data ◽  
Mesh Topology ◽  
Task Distribution ◽  
Local Navigation ◽  
Algorithmic Model

In this paper an approach is presented, enabling to solve the problem of local navigation of mobile robotic platforms (MRP), based on utilization of wireless networks with mesh topology. Establishment of wireless networks was ensured, based on the set of radio modules, mounted on unmanned aerial vehicles (UAV), comprising a swarm. This paper presents a developed algorithm for establishment of such wireless networks, aided by LoRa-technology, as well as an algorithm for MRP localization, based on analysis of signal level, where the incoming signals are fed from MRP group radio modules to radio modules of wireless data transfer network. An algorithmic model is given for task distribution among UAV and to implement navigational capabilities of MRP swarm. In some experiments descending dependencies of absolute error value, pertinent to MRP, from the number of UAV in action were revealed, as well as of averaged deflection value of MRP positions in motion along their paths from the number of UAV in action. Thereby the averaged value of MRP localization error, depending on the number of UAV in action, was from 8.14 to 17.13 m, and the averaged value of MRP position deflection - from 16.38 to 57.12 m, respectively.

scholarly journals NETWORK ORGANIZATION SCHEMES BASED ON WIRELESS PROTOCOLS

2020 ◽  
pp. 81-83
Author(s):  
A. A. Shmeleva ◽  
V. G. Barabanov ◽  
E. G. Krylov ◽  
N. V. Kozlovtseva
Keyword(s):  
Wireless Networks ◽  
Data Transfer ◽  
Network Organization ◽  
Wireless Data ◽  
Wireless Protocols

The scheme of network organization was developed and studied on the basis of wireless data transfer protocols. Other ways of building wireless networks for plants were compared and analyzed.

Wireless Data Transfer in under Water System

2017 ◽  
Author(s):  
S. Sangeetha ◽  
Santhi Priya ◽  
K. S. Saranya ◽  
S. Saranya ◽  
T. Jayasimha
Keyword(s):  
Data Transfer ◽  
Water System ◽  
Wireless Data

scholarly journals Cooperative synchronization control of intelligent lifting systems with actuator failures

2018 ◽  
Vol 10 (12) ◽  
pp. 168781401881349
Author(s):  
Lijing Dong
Keyword(s):  
Data Transfer ◽  
Synchronization Error ◽  
Synchronization Control ◽  
Wireless Data ◽  
Hydraulic Actuators ◽  
Actuator Failures ◽  
Distributed Controller ◽  
Transfer Unit ◽  
Distributed Synchronization ◽  
Lifting System

Synchronization of a large-scale lifting system with hydraulic actuator failures is investigated in this article. The lifting system is composed of multiple intelligent lifting subsystems with hydraulic actuators, wireless data transfer unit, and distributed controller. During the lifting process, the hydraulic actuators are possible to be malfunctioned. Once actuator failure occurs, the number of lifting points and the communication topology would change over different time intervals. This article proposes a distributed synchronization control method and adopts switching technique in analyzing the lifting synchronization. The distributed controller is designed with information received from around subsystems through wireless data transfer unit rather than with direct reference signal from the control station. On the basis of Lyapunov stability theory and switched technique, sufficient conditions that guarantee the synchronization of the lifting system with actuator failures are achieved, and synchronization errors can be reduced as small as desired. Finally, the effectiveness of proposed distributed synchronization controller is verified by numerical simulations conducted on AMESim platform. From the simulation results, it can be seen that when actuator failures occur, the synchronization error of the remaining lifting subsystems is less than 5%. The lifting synchronization error shrinks to 5% in 5.87 s when a broke-down subsystem returns to normal.

scholarly journals CHANNEL ALLOCATION FOR WIRELESS NETWORKS BASED ON INTELLIGENT METHOD

2021 ◽  
Vol 20 (4) ◽  
pp. 32-37
Author(s):  
Dominik NEZNÍK ◽  
◽  
Ľubomír DOBOŠ
Keyword(s):  
Wireless Networks ◽  
Data Transfer ◽  
Channel Allocation ◽  
Smart Cities ◽  
Data Rates ◽  
Different Types ◽  
Fuzzy Logic Method ◽  
Network Technologies ◽  
Near Future

In this paper, will be presented actual research of the intelligent channel allocation. The intelligent channel allocation is based on combination of fuzzy logic method and game theory attributes to increase quality of link in network. The channel allocations will become an important phenomenon in different types of networks such as 5G technology, wireless networks (IEEE 802.11xx), Z-Wave, LoRa, 3G, 4G, etc. In the near future, new network technologies, Internet of Things (IoT) and Smart Cities will need to have intelligent channel allocation to prevent interference on the channels used for data transfer. These networks along with IoT are considered as promising technology, that interconnects different types of networks into one fully functional network. The aim of this paper is to present the concept of a methods for channel allocation in wireless networks, where channels work as communication medium based on IEEE 802.11xx technology. The simulations prove, that proposed method is able to provide lower interference, improve data rates and increase quality of links.

scholarly journals DATA TRANSFER RATE IN NOISY CHANNELS OF WIRELESS NETWORKS

2021 ◽  
Vol 1 (132) ◽  
pp. 136-144
Author(s):  
Volodymyr Khandetskyi ◽  
Dmutro Sivtsov ◽  
Kostjantun Panin
Keyword(s):  
Wireless Networks ◽  
Transfer Rate ◽  
New Technologies ◽  
Data Transfer ◽  
Data Transfer Rate ◽  
Noisy Channels ◽  
Transfer Rates ◽  
Wide Range ◽  
Original Frame ◽  
Fragmented Data

Analysis of new technologies IEEE 802.11ac/ax of wireless networks showed that increasing their noise immunity is an actual task. The article studies the efficiency of fragmented data frames transmission. Comparison of the efficiencies in the case of retransmission of the corrupted original frame and in the case of its fragmentation in a wide range of the physical data transfer rates is carried out.

scholarly journals Modeling Goodput for Data Transmission in FANET

2020 ◽  
Vol 6 (1) ◽  
pp. 100-108
Author(s):  
I. Kaisina
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Transfer Process ◽  
Data Transmission ◽  
Data Transfer ◽  
Network Simulator ◽  
Data Traffic ◽  
Stream Data ◽  
Ground Station ◽  
Aerial Vehicles

This paper investigates the process of multi-stream data transmission from several unmanned aerial vehicles (UAV) to a ground station. We can observe a mathematical model of the data transfer process at the application level of the OSI model (from flying nodes to a ground station). The Poisson – Pareto packet process is used to describe the multi-stream data traffic. The results of simulation are obtained using the network simulator NS-3. It is considered a system for emulating the process of multi-stream data transmission from UAV to a ground station. Acording to the results of studies for multi-stream data transmission it is clear that the increase of the UAV source nodes which simultaneously transmit data to a ground station needs higher requirements for Goodput.

scholarly journals A Secure Optimization Algorithm for Quality-of-Service Improvement in Hybrid Wireless Networks

2021 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Smys S ◽  
Wang Haoxiang
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Optimization Algorithm ◽  
Communication Systems ◽  
Data Transfer ◽  
Mesh Networks ◽  
Service Improvement ◽  
Complex Data ◽  
Hybrid Wireless Networks

Various industrial, scientific and commercial processes involve wireless mesh networks in the recent days. These technologies improve communication technology to a large extent which has led to an increase in utilization of these systems in various fields. In application with intense and complex data flow, improving the quality of service (QoS) has been a challenge and a focus of research leading to more advanced wireless communication systems. This paper provides a novel optimization algorithm for improving the QoS in hybrid wireless networks while preventing malware and routing attacks. The concept of QoS and hybrid wireless networks are examined at the initial stage. Further, the algorithm for optimizing the service quality in the network is proposed accordingly. The ability of data transfer is benefited by data packets in this algorithm. Load distribution is performed such that overcrowding is prevented and information routing is done efficiently though the nodes. Delay or routing is created and control messages are sent for withholding data when certain nodes are overcrowded. This reduces the delay created by overcrowding by 50% while maintaining the permittivity.

scholarly journals Time Domain Spectroscopy/Imaging and Wireless Data Transfer Technologies with Terahertz Wave

2010 ◽  
Vol 19 (3) ◽  
pp. 12
Author(s):  
Mun Cheol PAEK ◽  
Min Hwan KWAK ◽  
Sungil KIM ◽  
Seung Beom KANG ◽  
Hancheol RYU ◽  
...  
Keyword(s):  
Time Domain ◽  
Data Transfer ◽  
Terahertz Wave ◽  
Wireless Data ◽  
Time Domain Spectroscopy

CMT-QA: Quality-Aware Adaptive Concurrent Multipath Data Transfer in Heterogeneous Wireless Networks

2013 ◽  
Vol 12 (11) ◽  
pp. 2193-2205 ◽  
Author(s):  
Changqiao Xu ◽  
Tianjiao Liu ◽  
Jianfeng Guan ◽  
Hongke Zhang ◽  
Gabriel-Miro Muntean
Keyword(s):  
Wireless Networks ◽  
Data Transfer ◽  
Heterogeneous Wireless Networks
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