scholarly journals An Experimental Assessment of LiFi Data Communication

2020 ◽  
Vol 61 (1) ◽  
pp. 73-87
Author(s):  
V. Gordon ◽  
P. Danquah
Keyword(s):  
Real Time ◽  
Optical Communication ◽  
Angular Position ◽  
Data Communication ◽  
Physical Layer ◽  
Data Rate ◽  
The Internet ◽  
Experimental Assessment ◽  
Wireless Optical Communication ◽  
Lateral Distance

In this paper, two functional light fidelity real-time testbeds implemented on custom Light fidelity (LiFi) kits are presented. This paper evaluates the use of LiFi technology over differ­ent distances and angular placement of illuminating devices and endpoint transceivers with connectivity locally and to the internet. The objective is to determine if distance or angular positioning in LiFi influence speeds or not. Finally, it aims to contribute to knowledge in the LiFi communication domain. We were limited to developing a customized testbed for wireless optical communication by accessing data in the physical layer via photons. In a lateral dis­tance and angular position, we examined the performance of a laptop with LiFi activated by a 3730 lm LED. The setup evaluated the performance of our design in a downlink and uplink scenario where the transmitter was embedded in the main LED unit and the laptop was used as a photoreceiver. The data rate/kbps, the lateral distance / m, and the angle displacement / θ° were the comparison metrics. The results of the tests show that the transmission of LiFi is not influenced by distance and angular positioning for both downloads and uploads over different distances.

Analysis of Things Technology to Promote the Dynamic Alliance Virtual Performance Evaluation

2014 ◽  
Vol 989-994 ◽  
pp. 5041-5044
Author(s):  
Hong Xia Zhang ◽  
Qiang Zhang
Keyword(s):  
Performance Evaluation ◽  
Internet Of Things ◽  
Real Time ◽  
Communication Technology ◽  
Data Communication ◽  
The Internet ◽  
Dynamic Alliance ◽  
Time Performance ◽  
Development Goals ◽  
Internet Of Things Technology

With the development of modern information and communication technology and network technology, modern enterprises choose to build virtual dynamic alliance to achieve business development goals. There are many uncertain relationships between the participating companies in the virtual dynamic alliance. These companies join together to accomplish a particular goal, but also has their own unique individual needs. Internet of Things is an important part of a new generation of information technology. Things technology is an extension and expansion of the network based on the Internet. Basis for building virtual dynamic alliance is the Internet. The enterprises participating in a virtual dynamic alliance communicate with each other relying on information communication technology. Internet of Things technology provides real-time performance evaluation data to the participating enterprises. This will ensure real-time performance data communication between the dynamic alliance enterprises relatively loose.

scholarly journals A Real-Time, Full-Duplex System for Underwater Wireless Optical Communication: Hardware Structure and Optical Link Model

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 109372-109387
Author(s):  
Jinjia Li ◽  
Bo Yang ◽  
Demao Ye ◽  
Linning Wang ◽  
Kang Fu ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Communication ◽  
Full Duplex ◽  
Duplex System ◽  
Optical Link ◽  
Wireless Optical Communication ◽  
Link Model ◽  
Hardware Structure

Sistem Absensi Real Time Berbasis Web Madrasah Aliyah Wasilatul Falah Banten

2020 ◽  
Vol 7 (2) ◽  
pp. 115
Author(s):  
Diah Wijayanti ◽  
Ridwan Adha ◽  
Eko Haryadi ◽  
Zahra Zahra
Keyword(s):  
Information System ◽  
Real Time ◽  
Data Communication ◽  
Learning Activities ◽  
The Internet ◽  
User Needs ◽  
Data Filtering ◽  
Web Based ◽  
Tertiary Institutions ◽  
Education Of Students

Abstrak: Jaringan untuk komunikasi data dikembangkan pada komputer dan membuat internet tampil dengan banyak aplikasi. Penyajian informasi yang dihasilkan dari internet sangat beragam dan tergantung dari kebutuhan pengguna. Informasi yang didapatkan pengguna, salah satunya adalah situs pendidikan dari sekolah dasar sampai peguruan tinggi Oleh karena itu dengan perkembangan teknologi madrasah Aliyah Wasilatul Falah Banten merancang sistem informasi absensi real time yag berbasis web. Aplikasi absensi ini memberikan pemenuhan kebutuhan pengguna dalam memasukkan data, mengubah data, menghapus data, mencari data, menyaring data dan mencetak data. Sistem informasi ini dapat menjadi salah satu solusi yang dapat diunakan untuk mempermudah guru dalam pendataan murid, selain itu dengan adanya aplikasi ini membuat pekerjaan menjadi lebih mudah, cepat dan efisien. Di samping itu juga dapat mengawasi pendidikan siswa-siswi dalam kehadiran di madrasah dan membuat orang tua dapat mengetahui proses kegiatan belajar anak-anaknya.   Kata kunci: absensi real time, sistem informasi.   Abstract: Networks for data communication were developed on computers and made the internet appear with many applications. The presentation of information generated from the internet is very diverse and depends on the needs of users. Information obtained by users, one of which is educational sites from elementary schools to tertiary institutions. Therefore, with the development of technology, Madrasah Aliyah Wasilatul Falah Banten designed a web-based real-time attendance information system. This attendance application provides fulfillment of user needs in entering data, changing data, deleting data, searching data, filtering data, and printing data. This information system can be one of the solutions that can be used to make it easier for teachers to collect student data, besides this application makes work easier, faster, and more efficient. In addition, it can also supervise the education of students in their attendance at madrasah and make parents know the process of their children's learning activities.   Keywords: information system, real-time attendance.

scholarly journals A new wireless sensor interface using dual-mode radio

2018 ◽  
Vol 7 (2) ◽  
pp. 507-515
Author(s):  
Felix Huening ◽  
Holger Heuermann ◽  
Franz-Josef Wache ◽  
Rami Audisho Jajo
Keyword(s):  
Wireless Communication ◽  
Real Time ◽  
Communication Systems ◽  
Data Transfer ◽  
Open Systems ◽  
Data Communication ◽  
Physical Layer ◽  
Area Network ◽  
Time Data ◽  
Dual Mode

Abstract. The integration of sensors is one of the major tasks in embedded, control and “internet of things” (IoT) applications. For the integration mainly digital interfaces are used, starting from rather simple pulse-width modulation (PWM) interface to more complex interfaces like CAN (Controller Area Network). Even though these interfaces are tethered by definition, a wireless realization is highly welcome in many applications to reduce cable and connector cost, increase the flexibility and realize new emerging applications like wireless control systems. Currently used wireless solutions like Bluetooth, WirelessHART or IO-Link Wireless use dedicated communication standards and corresponding higher protocol layers to realize the wireless communication. Due to the complexity of the communication and the protocol handling, additional latency and jitter are introduced to the data communication that can meet the requirements for many applications. Even though tunnelling of other bus data like CAN data is generally also possible the latency and jitter prevent the tunnelling from being transparent for the bus system. Therefore a new basic technology based on dual-mode radio is used to realize a wireless communication on the physical layer only, enabling a reliable and real-time data transfer. As this system operates on the physical layer it is independent of any higher layers of the OSI (open systems interconnection) model. Hence it can be used for several different communication systems to replace the tethered physical layer. A prototype is developed and tested for real-time wireless PWM, SENT (single-edge nibble transmission) and CAN data transfer with very low latency and jitter.

scholarly journals 20-meter underwater wireless optical communication link with 15 Gbps data rate

2016 ◽  
Vol 24 (22) ◽  
pp. 25502 ◽  
Author(s):  
Chao Shen ◽  
Yujian Guo ◽  
Hassan M. Oubei ◽  
Tien Khee Ng ◽  
Guangyu Liu ◽  
...  
Keyword(s):  
Optical Communication ◽  
Data Rate ◽  
Communication Link ◽  
Wireless Optical Communication

scholarly journals Implementation of Dimming controlled Visible Light Communication using Raspberry Pi

2021 ◽  
Author(s):  
Sandip Das ◽  
Biswajit Jana ◽  
Soumitra Kumar Mandal
Keyword(s):  
Visible Light ◽  
Optical Communication ◽  
Incidence Angle ◽  
Low Cost ◽  
Data Communication ◽  
Visible Light Communication ◽  
Raspberry Pi ◽  
Efficient Technology ◽  
Wireless Optical Communication ◽  
Dimming Control

Abstract Visible light communication (VLC) is a technology of wireless optical communication, which combines lighting and communication simultaneously. In indoor VLC system, both data communication and lighting quality plays an important role and must be considered. Thus, to achieve the desired levels of illumination, dimming control in VLC is an efficient technology. In this paper, the authors have designed and implemented a dimming control VLC system employing multi header-hybrid pulse position modulation (MH-HPPM) to achieve dimming functionality. MH-HPPM supports various dimming levels and also doesn’t have flicker problems. In this paper, the authors present the implementation of MH-HPPM based VLC system using Raspberry pi. The prototype is designed using low-cost commodity hardware. Comprehensive experiments are carried out to evaluate the performance of MH-HPPM based VLC under dimming levels 0.25, 0.5 and 0.75. The results demonstrate that designed prototype supports a communication distance up to 3m for dimming level 0.25 and 3.6m for dimming level 0.5 and 0.75. It is also observed that MH-HPPM based VLC system also achieves and maintains better throughput for different incidence angle.

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