scholarly journals Uma Análise dos Protocolos de Comunicação para Internet das Coisas

2019 ◽  
Author(s):  
Arthur Brito Cosmi ◽  
Vinicius F. S. Mota
Keyword(s):  
Decision Making ◽  
Internet Of Things ◽  
Qualitative Analysis ◽  
Access Point ◽  
The Internet ◽  
Application Layer ◽  
The Internet Of Things

With the growth of devices connected to the Internet, several application layer protocols specific for the Internet of Things (IoT) appear every day. This high number of protocols bring doubts to developers about what to use in their projects. This work aims to assist developers in the decision making in their IoT projects. This work presents a qualitative analysis of the MQTT, MQTT-SN, CoAP and AMQP protocols. In a qualitative way, we analyzed thedomains of application and requirements of the applications to map the protocol choice. After that, the MQTT and CoAP protocols were analyzed using devices with low processing and memory capabilities. Results show that MQTT outperforms CoAP when there are several other devices accessing the same access point.

The Role of Internet of Things, Knowledge Management, and Open Innovation in SME Sustainability

2020 ◽  
pp. 295-303
Author(s):  
Muhammad Imran ◽  
Jawad Iqbal ◽  
Hassan Mujtaba Nawaz Saleem
Keyword(s):  
Decision Making ◽  
Knowledge Management ◽  
Internet Of Things ◽  
Open Innovation ◽  
Knowledge Generation ◽  
The Internet ◽  
Process Framework ◽  
The Relationship ◽  
The Internet Of Things

The main objective of the chapter is to discuss the relationship between internet of things and knowledge management; knowledge management and open innovation; open innovation and SMEs sustainability. The relationship between the constructs developed and discuss on the behalf of past studies. The present chapter found that Internet of Things is playing an important role in knowledge generation and management, further, knowledge management is very important for open innovation environment in SMEs. Moreover, the open innovation sustains the SMEs performance. In respect of implications, the owner / managers of SMEs should consider the Internet of Things, knowledge management, and open innovation capabilities during the decision making for SME sustainability. Moreover, this is a process framework which brings the effect of one variable to other variables. However, the future studies should empirically validate the proposed research framework.

scholarly journals Solar-Supplied Satellite Internet Access Point for the Internet of Things in Remote Areas

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1409
Author(s):  
Angus Wong ◽  
Yan Tai Chow
Keyword(s):  
Internet Of Things ◽  
Solar Energy ◽  
Internet Access ◽  
Access Point ◽  
Satellite Communications ◽  
The Internet ◽  
Wireless Technology ◽  
Internet Connectivity ◽  
Remote Areas ◽  
The Internet Of Things

As satellite communications provide ubiquitous coverage, they play a key role in providing Internet connectivity in remote or marginalized areas, so as to enable the vision of a truly global connectivity of the Internet of Things (IoT). However, these areas often lack reliable electricity supply. Thus, this paper proposes a satellite internet access point powered by solar energy, so that a stable Internet connection can be provided. The access point provides Wi-Fi coverage so that sensors, IoT, and devices can connect to the access point using the Wi-Fi, a common wireless technology. Our design took some cost-saving measures to make it affordable and selected the components that require minimal maintenance operations. The satellite access point costs about USD $500, and can provide four days of Internet connectivity without solar energy.

scholarly journals What Is the Fastest Way to Connect Stations to a Wi-Fi HaLow Network?

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2744 ◽  
Author(s):  
Dmitry Bankov ◽  
Evgeny Khorov ◽  
Andrey Lyakhov ◽  
Ekaterina Stepanova ◽  
Le Tian ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Optimal Algorithm ◽  
Access Point ◽  
The Internet ◽  
Shared Channel ◽  
Set Up ◽  
The Internet Of Things ◽  
Self Adaptive

Wi-Fi HaLow is an adaptation of the widespread Wi-Fi technology for the Internet of Things scenarios. Such scenarios often involve numerous wireless stations connected to a shared channel, and contention for the channel significantly affects the performance in such networks. Wi-Fi HaLow contains numerous solutions aimed at handling the contention between stations, two of which, namely, the Centralized Authentication Control (CAC) and the Distributed Authentication Control (DAC), address the contention reduction during the link set-up process. The link set-up process is special because the access point knows nothing of the connecting stations and its means of control of these stations are very limited. While DAC is self-adaptive, CAC does require an algorithm to dynamically control its parameters. Being just a framework, the Wi-Fi HaLow standard neither specifies such an algorithm nor recommends which protocol, CAC or DAC, is more suitable in a given situation. In this paper, we solve both issues by developing a novel robust close-to-optimal algorithm for CAC and compare CAC and DAC in a vast set of experiments.

scholarly journals Compreendendo o Desempenho de Gerenciadores de Contexto para Internet das Coisas

2017 ◽  
Author(s):  
Ivan Zyrianoff ◽  
Fabrizio Borelli ◽  
Alexandre Heideker ◽  
Gabriela Biondi ◽  
Carlos Kamienski
Keyword(s):  
Decision Making ◽  
Performance Analysis ◽  
Internet Of Things ◽  
Synthetic Data ◽  
Management Systems ◽  
The Internet ◽  
Context Aware ◽  
Analysis Study ◽  
Results Reporting ◽  
The Internet Of Things

Context-Aware Management Systems have been proposed in the last years to perform automatic decision making for the Internet of Things. Although scalability is an indispensable feature for those systems, there are no comprehensive results reporting their performance. This paper shows results of a performance analysis study of different context-aware architectures and introduces the SenSE platform for generating sensor synthetic data. Results show that different architectural choices impact system scalability and that automatic real time decision-making is feasible in an environment composed of dozens of thousands of sensors that continuously transmit data.

scholarly journals OSA Patient Monitoring System Based on the Internet of Things Framework

2020 ◽  
Author(s):  
Liangming Cai ◽  
Jingrong Le ◽  
Xuxin Ruan ◽  
Min Du
Keyword(s):  
Internet Of Things ◽  
Monitoring System ◽  
Comparative Trial ◽  
Middle Layer ◽  
Base Station ◽  
The Internet ◽  
Application Layer ◽  
Positioning Accuracy ◽  
Communication Satellite ◽  
The Internet Of Things

This paper presents an OSA patient interactive monitoring system based on the Internet of Things (IoT) framework. This system allows OSA patients to get timely rescue when they are sleepy outside. Because the Beidou position marker has an interactive function, it can reduce the anxiety of the patient while waiting for the rescue. At the same time, if a friend helps the OSA patients to call the doctor, the friend can also report the patient's condition in time. This system uses the popular IoT framework. At the bottom is the data acquisition layer, which uses wearable sensors to collect vital signs from patients, with a focus on ECG and SpO2 signals. The middle layer is the network layer that transmits the collected physiological signals to the Beidou indicator using the Bluetooth Low Energy (BLE) protocol. The top layer is the application layer, and the application layer uses the mature rescue interactive platform of Beidou. Since the GPS indicator has not included the communication satellite, So it has no SMS function. OSA patients can only passively wait for a rescue. Moreover, due to the lack of satellites in Asia and the insufficient density of the ground-enhanced system, the positioning error of OSA patients is large. The Beidou system developed by China itself, the main coverage of the satellite is in Asia, and is equipped with a high-density ground-based augmentation system. Therefore, the Beidou model improves the positioning accuracy and is equipped with a special communication satellite, which increases the short message interaction function. Therefore, patients can report disease progression in time while waiting for a rescue. After our simulation test, the effectiveness of the OSA patient rescue monitoring system based on the Internet of Things framework and the positioning accuracy of OSA patients have been greatly improved. Especially when OSA patients work outdoors, the cell phone base station signal coverage is relatively weak. The satellite signal is well covered, plus the SMS function of the Beidou indicator. Therefore, the system can be used to provide timely patient progress and provide data support for the medical rescue team to provide a more accurate rescue plan. After a comparative trial, the rescue rate of OSA patients using the detection device of this system was increased by 15 percentage points compared with the rescue rate using only GPS satellite phones.

scholarly journals Cloud Data Security Protection Technique using Internet on Things

2019 ◽  
Vol 9 (1) ◽  
pp. 2620-2623
Keyword(s):  
Internet Of Things ◽  
Data Security ◽  
Focal Point ◽  
The Internet ◽  
Application Layer ◽  
Cloud Data ◽  
Safety Concerns ◽  
Set Up ◽  
The Internet Of Things ◽  
The Web

The internet of things is turning into an appealing framework worldview to acknowledge inter-connections throughout corporeal, digital as well as communal gaps. Through the connections amid the IoT, safety concerns befall important, along with it is huge to set up improved resolutions for safety protections. The IoT apparition of unlock data sharing is expert through using cloud registering concepts. Since IoT is depends on the web, safety concerns of internet will similarly emerge in IoT as well as IoT enclose three layers for example perception, transportation and application layers. The safety concerns, modernism along with solution recognized by the application layer are conversed about in this Paper. The principle focal point of this examination work is on Data Security Protection procedure for application layer

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