Use of low cost wireless communication technology for education in rural Kenya

2010 ◽  
Author(s):  
B. Mayeku ◽  
J. Kilwake ◽  
F. Bertarelli
Keyword(s):  
Wireless Communication ◽  
Communication Technology ◽  
Low Cost ◽  
Rural Kenya

Application of Wireless Communication in Multi-Channel Temperature Control System

2013 ◽  
Vol 397-400 ◽  
pp. 1918-1922
Author(s):  
Li Mei Wen
Keyword(s):  
Wireless Communication ◽  
Communication Technology ◽  
Temperature Sensor ◽  
Low Cost ◽  
Wireless Transmission ◽  
Temperature Control System ◽  
Communications Technology ◽  
Channel Temperature ◽  
Wireless Module ◽  
Wired Communication

In the technology of temperature measurement, the sensor is an important part of system. But with the increase of the number of sensors, it will undoubtedly bring with a lot of data cable. Compared with wired communication technology, wireless communications technology has the advantages of low cost, simple structures, low impact of environment. So the wireless communication technology meeting with the requirements of data communications has become a more practical, fast and efficient way. This paper describes a multi-channel temperature monitoring system using nRF905 wireless transmission module, STC89C52RC MCU and DS18B20 temperature sensor as core. Functions such as sampling, analysis, display, alarm and others can be done automatically by the system, dates transmitted by wireless module, and the system can realize the function of real-time monitoring of temperature.

Analysis on WPAN Mechanism Based on 802.15.4 and Data Structure Design

2014 ◽  
Vol 686 ◽  
pp. 434-438
Author(s):  
Zhi Wei Chen ◽  
Yu Ming Gan
Keyword(s):  
Wireless Communication ◽  
Low Power ◽  
Communication Technology ◽  
Performance Indicators ◽  
Short Distance ◽  
Transmission Rate ◽  
Low Cost ◽  
Low Complexity ◽  
Structure Design ◽  
Hardware Platform

IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. It is a two-way wireless communication technology with short distance, low complexity, low power consumption and low data transmission rate and low cost. The paper analyzes the features, framework,performance indicators and overall hardware platform structure of JN5121 chip which is used in JENNIC Corporation. And the paper researches the characteristics of actual products for project development.

Temperature and Humidity Measuring System Based on ZigBee and GPRS

2014 ◽  
Vol 716-717 ◽  
pp. 1068-1071
Author(s):  
Mao Fa Gong ◽  
Fan Jiao Yin ◽  
Qiang Gu ◽  
Bao Ye Song ◽  
Yong Jin Yu
Keyword(s):  
Wireless Communication ◽  
Communication Technology ◽  
Agricultural Production ◽  
Short Distance ◽  
Low Cost ◽  
Measuring System ◽  
Long Distance ◽  
Agricultural Producers ◽  
Temperature And Humidity ◽  
Solar Powered

It is important for modern agricultural production to measure temperature and humidity in a real time way. This paper combined the short-distance wireless communication technology ZigBee with the long-distance wireless communication technology GPRS to design a solar-powered temperature and humidity measuring system. The system is easy to install and can run in low cost, so it is especially suitable for small and medium agricultural producers.

scholarly journals Application of NFC Technology and Short Distance Wireless Communication Technology in Intelligent Meter Reading

1970 ◽  
Vol 1 (2) ◽  
Author(s):  
Gu Jiang Tao
Keyword(s):  
Wireless Communication ◽  
Low Power ◽  
Communication Technology ◽  
Short Distance ◽  
Short Range ◽  
Low Cost ◽  
Near Field ◽  
Smart Phones ◽  
Near Field Communication ◽  
Reading System

With the popularization of smart phones and the continuous popularization of NFC near field communication technology, low-power short-range wireless communication technology is widely used in wireless meter reading. It is used for meter reading and compatibility in existing systems. This paper de-signs a wireless meter reading system based on short distance wireless communication technology and NFC. The system is stable, low cost and good versa-tility. The system is based on short distance wireless communication technology and NFC wireless meter reading system.

System Design of Greenhouse Temperature and Humidity Monitoring and Alarming

2014 ◽  
Vol 541-542 ◽  
pp. 1338-1349 ◽  
Author(s):  
Li Cai Zhang ◽  
Xue Lun Hu ◽  
Yao Guang Wei ◽  
Ying Yi Chen
Keyword(s):  
Wireless Communication ◽  
Data Acquisition ◽  
Communication Technology ◽  
Rural Areas ◽  
Online Monitoring ◽  
Low Cost ◽  
Application Range ◽  
Traditional System ◽  
Central Node ◽  
Temperature And Humidity

The production of greenhouse has become an important means to increase the income of China's rural areas and farmers, because the environment of greenhouses is controllable and the production is efficient. The temperature and humidity are the most important environmental impacts in the production of crop. The traditional regulation of the environment in greenhouses relies on artificial sampling detection which is inefficiency. Some advanced greenhouses use field wiring to implement the environmental regulation, but the environment is complex so field wiring is also a difficult problem. Aiming at solving the problem of monitoring the temperature and humidity in greenhouses, this paper designs a on-line monitoring system of greenhouses which is based on the wireless communication technology. The system adopts the DHT11 sensors to monitor the temperature and humidity in the greenhouse, and adopts the wireless communication technology of ZigBee so as to realize the online monitoring of the temperature and humidity. By using the wireless transmission and data acquisition nodes which are placed in different greenhouses can transmit the value of the temperature and humidity in greenhouses to the central node easily, and also realized the function of the online monitoring, alarm and transmitting data from different data acquisition nodes to the central node. The system consists of a data acquisition module, a wireless communication module, an alarm module and so on. The system is advanced because of its simple structure, small volume, low cost, easy operation, wide application range, strong scalability and so on. Compared with the traditional system, it can meet the demand of acquiring the temperature and humidity value of greenhouses in China.

Design and Application of Medical Monitoring System Based on Android

2014 ◽  
Vol 687-691 ◽  
pp. 990-993
Author(s):  
Lian Wang ◽  
Geng Guo Cheng
Keyword(s):  
Wireless Communication ◽  
Medical Care ◽  
Monitoring System ◽  
Communication Technology ◽  
New Technologies ◽  
Low Cost ◽  
Medical Monitoring ◽  
Detection Technology ◽  
High Efficient ◽  
Wearable Medical

With the development of information and communication technology and the advent of new technologies including wireless communication, smart handheld mobile terminals and wearable medical sensor detection technology, mobile medical care is facing its development opportunity. In this context, our medical monitoring system combines wireless communication technology with wearable medical sensor and designs a remote medical monitoring of multiple physiological parameters. With the support of Android devices, this system offers medical reports retrieval, online diagnosis and health guidelines. It provides users with multi-functional, instant, real-time monitoring and interactive medical services in a high efficient low cost way, which enables remote interrogation and medical care become possible.

scholarly journals Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1439
Author(s):  
Janghyuk Youn ◽  
Woong Son ◽  
Bang Chul Jung
Keyword(s):  
Wireless Communication ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Low Cost ◽  
Physical Layer ◽  
Base Station ◽  
Wireless Communication Systems ◽  
Secrecy Rate ◽  
Pilot Signal ◽  
Time Division

Recently, reconfigurable intelligent surfaces (RISs) have received much interest from both academia and industry due to their flexibility and cost-effectiveness in adjusting the phase and amplitude of wireless signals with low-cost passive reflecting elements. In particular, many RIS-aided techniques have been proposed to improve both data rate and energy efficiency for 6G wireless communication systems. In this paper, we propose a novel RIS-based channel randomization (RCR) technique for improving physical-layer security (PLS) for a time-division duplex (TDD) downlink cellular wire-tap network which consists of a single base station (BS) with multiple antennas, multiple legitimate pieces of user equipment (UE), multiple eavesdroppers (EVEs), and multiple RISs. We assume that only a line-of-sight (LOS) channel exists among the BS, the RISs, and the UE due to propagation characteristics of tera-hertz (THz) spectrum bands that may be used in 6G wireless communication systems. In the proposed technique, each RIS first pseudo-randomly generates multiple reflection matrices and utilizes them for both pilot signal duration (PSD) in uplink and data transmission duration (DTD) in downlink. Then, the BS estimates wireless channels of UE with reflection matrices of all RISs and selects the UE that has the best secrecy rate for each reflection matrix generated. It is shown herein that the proposed technique outperforms the conventional techniques in terms of achievable secrecy rates.

scholarly journals Applications of Smart Helmet in Applied Sciences: A Systematic Review

2021 ◽  
Vol 11 (11) ◽  
pp. 5039
Author(s):  
Yosoon Choi ◽  
Yeanjae Kim
Keyword(s):  
Applied Sciences ◽  
Wireless Communication ◽  
Communication Technology ◽  
Academic Research ◽  
Current Status ◽  
Smart Devices ◽  
The Past ◽  
Modular Concept ◽  
Research Questions ◽  
Cloud Servers

A smart helmet is a wearable device that has attracted attention in various fields, especially in applied sciences, where extensive studies have been conducted in the past decade. In this study, the current status and trends of smart helmet research were systematically reviewed. Five research questions were set to investigate the research status of smart helmets according to the year and application field, as well as the trend of smart helmet development in terms of types of sensors, microcontrollers, and wireless communication technology. A total of 103 academic research articles published in the past 11 years (2009–2020) were analyzed to address the research questions. The results showed that the number of smart helmet applications reported in literature has been increasing rapidly since 2018. The applications have focused mostly on ensuring the safety of motorcyclists. A single-board-based modular concept unit, such as the Arduino board, and sensor for monitoring human health have been used the most for developing smart helmets. Approximately 85% of smart helmets have been developed to date using wireless communication technology to transmit data obtained from smart helmets to other smart devices or cloud servers.

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