scholarly journals Evaluation of the Use of Class B LoRaWAN for the Coordination of Distributed Interface Protection Systems in Smart Grids

2020 ◽  
Vol 9 (1) ◽  
pp. 13 ◽  
Author(s):  
Marco Pasetti ◽  
Emiliano Sisinni ◽  
Paolo Ferrari ◽  
Stefano Rinaldi ◽  
Alessandro Depari ◽  
...  
Keyword(s):  
Response Time ◽  
Communication Networks ◽  
Smart Grids ◽  
Distribution Networks ◽  
Maximum Response ◽  
Area Network ◽  
Wide Area Network ◽  
Protection Systems ◽  
Class B ◽  
Maximum Response Time

The adoption of the distributed generation paradigm is introducing several changes in the design and operation of modern distribution networks. Modern grid codes are becoming more and more complex, and the adoption of smart protection systems is becoming mandatory. However, the adoption of newer and smarter units is only half of the story. Proper communication networks must be provided as well, and the overall costs may become critical. In this work, the adoption of the Long-Range Wide Area Network (LoRaWAN) technology is suggested as a viable approach to implement the coordination of Interface Protection Systems. A proper communication architecture based on the LoRaWAN Class B technology was proposed and evaluated in order to assess its feasibility for the considered application. A scalability analysis was carried out, by computing the number of devices that can be handled by a single LoRaWAN Gateway (GW) and the maximum expected time of response between a triggering event and the arrival of the related coordination command. The results of the study showed that up to 312 devices can be managed by a single GW, by assuring a maximum response time of 22.95 s. A faster maximum response time of 6.2 s is also possible by reducing the number of managed devices to 12.

OLTP PERFORMANCE IMPROVEMENT USING FILE-SYSTEMS LAYER COMPRESSION

2017 ◽  
Vol 79 (4) ◽  
Author(s):  
Suharjito Suharjito ◽  
Adrianus B. Kurnadi
Keyword(s):  
Response Time ◽  
Performance Improvement ◽  
Compression Ratio ◽  
File Systems ◽  
Transaction Processing ◽  
Maximum Response ◽  
Improve Performance ◽  
Oracle Database ◽  
Maximum Response Time ◽  
The Cost

Database for Online Transaction Processing (OLTP) application is used by almost every corporations that has adopted computerisation to support their operational day to day business. Compression in the storage or file-systems layer has not been widely adopted for OLTP database because of the concern that it might decrease database performance. OLTP compression in the database layer is available commercially but it has a significant licence cost that reduces the cost saving of compression. In this research, transparent file-system compression with LZ4, LZJB and ZLE algorithm have been tested to improve performance of OLTP application. Using Swing-bench as the benchmark tool and Oracle database 12c, The result indicated that on OLTP workload, LZJB was the most optimal compression algorithm with performance improvement up to 49% and consistent reduction of maximum response time and CPU utilisation overhead, while LZ4 was the compression with the highest compression ratio and ZLE was the compression with the lowest CPU utilisation overhead. In terms of compression ratio, LZ4 can deliver the highest compression ratio which is 5.32, followed by LZJB, 4.92; and ZLE, 1.76. Furthermore, it is found that there is indeed a risk of reduced performance and/or an increase of maximum response time.

scholarly journals JMAC Protocol: A Cross-Layer Multi-Hop Protocol for LoRa

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6893
Author(s):  
Juan José López López Escobar ◽  
Felipe Gil-Castiñeira ◽  
Rebeca P. Díaz Díaz Redondo
Keyword(s):  
Communication Networks ◽  
Smart Cities ◽  
Area Network ◽  
Wireless Communication Networks ◽  
Wide Area Network ◽  
Coverage Area ◽  
Radio Technology ◽  
Long Lifetime ◽  
Good Coverage ◽  
Non Line Of Sight

The emergence of Low-Power Wide-Area Network (LPWAN) technologies allowed the development of revolutionary Internet Of Things (IoT) applications covering large areas with thousands of devices. However, connectivity may be a challenge for non-line-of-sight indoor operation or for areas without good coverage. Technologies such as LoRa and Sigfox allow connectivity for up to 50,000 devices per cell, several devices that may be exceeded in many scenarios. To deal with these problems, this paper introduces a new multi-hop protocol, called JMAC, designed for improving long range wireless communication networks that may support monitoring in scenarios such smart cities or Industry 4.0. JMAC uses the LoRa radio technology to keep low consumption and extend coverage area, and exploits the potential mesh behaviour of wireless networks to improve coverage and increase the number of supported devices per cell. JMAC is based on predictive wake-up to reach long lifetime on sensor devices. Our proposal was validated using the OMNeT++ simulator to analyze how it performs under different conditions with promising results.

scholarly journals Rancang Bangun alat pembuka pintu portal berbasis arduino menggunakan smartphone

2020 ◽  
Vol 1 (1) ◽  
pp. 27-31
Author(s):  
Achmad Haris Afandi ◽  
Putri Anbar Ghalia ◽  
Kistiani Kistiani ◽  
Indri Rahma Sari ◽  
Sri Aswaidar Miza
Keyword(s):  
Response Time ◽  
System Design ◽  
Open Space ◽  
Type A ◽  
Maximum Response ◽  
Maximum Distance ◽  
Automated System ◽  
Servo Motor ◽  
Maximum Response Time ◽  
Green Leds

This study aims to design a prototype Arduino-based portal door controller system device using a smartphone. The making of the tool is done as one of the efforts in advancing technology to provide convenience and comfort through the development of an automated system in the home in the form of automatic portal doors using smartphones. The components used for system design are Arduino REV3 microcontroller module, USB 2.0 type A / B cable (Arduino USB cable), SG90 9g servo motor, red and green LEDs, 220Ω resistor, mini protoboard, connecting cable, jumper cable, and bluetooth module HC06, Powerbank with a capacity of 5600 mAh and a smartphone, while designing software uses Arduino IDE. Based on the results of measurements and testing, the system on the device made is able to open and close the portal door automatically at a maximum distance of 15 meters with a maximum response time of 1 second in open space

scholarly journals RTSM: Response time optimisation during switch migration in software-defined wide area network

2020 ◽  
Vol 10 (3) ◽  
pp. 105-111 ◽  
Author(s):  
Kshira Sagar Sahoo ◽  
Mayank Tiwary ◽  
Bibhudatta Sahoo ◽  
Brojo Kishore Mishra ◽  
Somula RamaSubbaReddy ◽  
...  
Keyword(s):  
Response Time ◽  
Wide Area ◽  
Area Network ◽  
Wide Area Network ◽  
Switch Migration

scholarly journals Data-Centric Communication Framework for Multicast IEC 61850 Routable GOOSE Messages over the WAN in Modern Power Systems

2020 ◽  
Vol 10 (3) ◽  
pp. 848 ◽  
Author(s):  
Tarek A. Youssef ◽  
Mohammad Mahmoudian Esfahani ◽  
Osama Mohammed
Keyword(s):  
Power Systems ◽  
Smart Grids ◽  
Area Network ◽  
Monitoring And Control ◽  
Wide Area Network ◽  
Iec 61850 ◽  
Control Center ◽  
Communication Framework ◽  
Data Distribution Service ◽  
Florida International University

In this paper, a data-centric communication framework is proposed for multicast routable generic object-oriented substation event (GOOSE) messages (MRGM) over the wide area network (WAN) for effective substation-to-substation (SS2SS) and substation to control center (SS2CC) communications. In this structure, the IEC 61850 GOOSE message is transmitted over the WAN using the data distribution service (DDS) as a fast, reliable, and secure data-centric communication middleware. The main feature of this framework is its multicast capability, where several authorized subscribers can receive a published message simultaneously. This can significantly improve the system monitoring and control of the protection systems in modern smart grids, where intelligent schemes can be applied. The effectiveness of the proposed platform, in terms of total end-to-end delay between participants, is evaluated through experimental results obtained from the actual hardware-based test setup developed at the Florida International University (FIU) smart grid testbed. The results demonstrate that the latency between sending and receiving a GOOSE message among participants is within its maximum time span defined by the IEC 61850-90-5 working group for communications over the WAN.

Optimal allocation of emergency response services for managing disasters

2014 ◽  
Vol 23 (4) ◽  
pp. 329-342 ◽  
Author(s):  
Evangelos Mitsakis ◽  
Iraklis Stamos ◽  
Jose Maria Salanova Grau ◽  
Georgia Aifadopoulou
Keyword(s):  
Response Time ◽  
Objective Function ◽  
Disaster Management ◽  
Emergency Response ◽  
Optimal Allocation ◽  
Response Times ◽  
Maximum Response ◽  
Content Type ◽  
Maximum Response Time ◽  
Emergency Response Services

Purpose – The purpose of this paper is to present and apply a methodology that optimally assigns emergency response services (ERS) stations in Peloponnesus, Greece that was severely hit by wildfires in 2007, in an effort to describe the actual emergency response in this disaster and identify disaster management possibilities that can arise from the optimal allocation of the existing fire stations. Design/methodology/approach – The methodology concerns the development of an objective function that aims to minimize maximum and average response times of ERS stations and the evaluation of developed scenarios. Simulated annealing is used for the minimization of the objective function, providing near-optimal solutions with low computation times for medium-scale networks. Findings – The findings concern the comparison of average and maximum response times of ERS stations to hearths of fire, based on their actual and optimal allocation. They reveal an overall reduction in the average and maximum response time by 20 and 30 percent, respectively, for the entire region, while there is a reduction of 15 and 35 percent in the average and maximum response time for the locations affected by the 2007 wildfires. Research limitations/implications – The methodology is formulated as a facility location problem with unitary demand and unlimited capacity in the stations, which means that the allocation does not take into account simultaneous events. Originality/value – The paper fulfills an identified need to apply innovative research solutions to actual case studies in order to identify existing gaps and future disaster management possibilities.

scholarly journals Analysis of Bidirectional ADR-Enabled Class B LoRaWAN Networks in Industrial Scenarios

2020 ◽  
Vol 10 (22) ◽  
pp. 7964
Author(s):  
David Todoli-Ferrandis ◽  
Javier Silvestre-Blanes ◽  
Víctor Sempere-Payá ◽  
Ana Planes-Martínez
Keyword(s):  
Energy Consumption ◽  
Low Power ◽  
Packet Loss ◽  
Industry 4.0 ◽  
Smart Cities ◽  
Data Rate ◽  
Wide Area ◽  
Area Network ◽  
Wide Area Network ◽  
Class B

Low-power wide-area network (LPWAN) technologies are becoming a widespread solution for wireless deployments in many applications, such as smart cities or Industry 4.0. However, there are still challenges to be addressed, such as energy consumption and robustness. To characterize and optimize these types of networks, the authors have developed an optimized use of the adaptative data rate (ADR) mechanism for uplink, proposed its use also for downlink based on the simulator ns-3, and then defined an industrial scenario to test and validate the proposed solution in terms of packet loss and energy.

scholarly journals Implementing and Examination of EIGRP OSPF RIP Routing protocol in AMI Network for DDoS attack using OPNET

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3776-3783
Keyword(s):  
Smart Grid ◽  
Communication Networks ◽  
Smart Grids ◽  
Data Transfer ◽  
Area Network ◽  
Smart Meters ◽  
Simulation Tools ◽  
Ddos Attack ◽  
Network Parameters ◽  
Advanced Metering

A Smart Grid is the advancement for power matrix with utilization of correspondence innovation with number of powerful meters which are interconnected and two-way data / information flows and has the main goals is to the active participants of consumers to improve quality and reliability of energy usage as for reducing energy consumption and provide increasing reliability as communication between smart meters and consumers. Basically, Smart Grid is working with distributed system manner, and create a network infrastructure as Advanced Metering Infrastructure (AMI) with number of different smart meter. This AMI network includes NAN (Neighbourhood Area Network), have connected with number of smart meters (as wired / wireless) connections with repeater / router as commonly name as Gateway collector which collets the all the consumers information’s and send to the Utility centre. The flow of information as energy usages and power in smart grids is bidirectional which is controlled with the help of software and supporting hardware. Here, with using of Optimized Network Engineering Tools (OPNET) Modeler is one of the most dominant simulation tools for the analysis of communication networks. In this paper, the number of smart meters is connected and create an AMI networks were developed with network parameters which related to different communication as wireless for the compute the different network parameters with respect to the time where data transfer and DDoS attack to the network. The security aspect as detect the DDoS attack to the AMI network and provide a guideline to the future of AMI network where escape strange challenges faced by Distribution companies. Here, in this paper the progressed metering foundation (AMI), which is one of the savvy framework's application regions where make a proving ground and arrangement in the OPNET for assessed the exhibition and power the board model for the framework

Review of key management techniques for advanced metering infrastructure

2021 ◽  
Vol 17 (8) ◽  
pp. 155014772110415
Author(s):  
Otisitswe Kebotogetse ◽  
Ravi Samikannu ◽  
Abid Yahya
Keyword(s):  
Smart Grid ◽  
Communication Networks ◽  
Key Management ◽  
Power Grid ◽  
Cyber Attacks ◽  
Area Network ◽  
Advanced Metering Infrastructure ◽  
Wide Area Network ◽  
Security Issues ◽  
Advanced Metering

The electricity industry has been developed through the introduction of the smart grid. This has brought about two-way communication to the grid and its components. The smart grid has managed to increase the efficiency and reliability of the traditional power grid over the years. A smart grid has a system that is used to measure and collect readings for power consumption reflection, and the system is known as the Advanced Metering Infrastructure. The advanced metering infrastructure has its components too which are the smart metre, metre control system, collector or concentrator and communication networks (wide area network, neighbourhood area network, and home area network). The communication networks in the advanced metering infrastructure have created a vulnerability to cyber-attacks over the years. The reliability of the power grid to consumers relies on the readings from the smart metre, and this brings about the need to secure the smart metre data. This article presents a review of key management methods in advanced metering infrastructure environments. The article begins with an overview of advanced metering infrastructure and then shows the relationship between the advanced metering infrastructure and the smart grid. The review then provides the security issues related to advanced metering infrastructure. Finally, the article provides existing works of key management methods in advanced metering infrastructure and future directions in securing advanced metering infrastructure and the smart grid.

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