scholarly journals Radio over Fiber: An Alternative Broadband Network Technology for IoT

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1785 ◽  
Author(s):  
Diego F. Paredes-Páliz ◽  
Guillermo Royo ◽  
Francisco Aznar ◽  
Concepción Aldea ◽  
Santiago Celma
Keyword(s):  
Mobile Networks ◽  
Data Transfer ◽  
Intermediate Frequency ◽  
Radio Over Fiber ◽  
Broadband Access Networks ◽  
High Data ◽  
Integrated Optical ◽  
Broadband Network ◽  
Wireless Broadband ◽  
Information Format

Wireless broadband access networks have been positioning themselves as a good solution for manufacturers and users of IoT (internet of things) devices, due mainly to the high data transfer rate required over terminal devices without restriction of information format. In this work, a review of two Radio over Fiber strategies is presented. Both have excellent performance and even offer the possibility to extend wireless area coverage where mobile networks do not reach or the 802.11 network presents issues. Radio Frequency over Fiber (RFoF) and intermediate Frequency over Fiber (IFoF) are two transmission strategies compatible with the required new broadband services and both play a key role in the design of the next generation integrated optical–wireless networks, such as 5G and Satcom networks, including on RAU (Remote Antenna Unit) new functionalities to improve their physical dimensions, employing a microelectronic layout over nanometric technologies.

scholarly journals Radio over Fiber: An Alternative Broadband Network Technology for IoT

2020 ◽  
Vol 8 ◽  
Author(s):  
Diego Fabián Paredes Páliz ◽  
Guillermo Royo ◽  
Francisco Aznar ◽  
Concepción Aldea ◽  
Santiago Celma
Keyword(s):  
Mobile Networks ◽  
Data Transfer ◽  
Intermediate Frequency ◽  
Radio Over Fiber ◽  
Broadband Access Networks ◽  
High Data ◽  
Integrated Optical ◽  
Broadband Network ◽  
Wireless Broadband ◽  
Information Format

Wireless broadband access networks have been positioning themselves as a good solution for manufacturers and users of IoT (internet of things) devices, due mainly to the high data transfer rate required over terminal devices without restriction of information format. In this work, a review of two Radio over Fiber strategies is presented. Both have excellent performance and even offer the possibility to extend wireless area coverage where mobile networks do not reach, or the 802.11 network presents issues. Radio Frequency over Fiber (RFoF) and intermediate Frequency over Fiber (IFoF) are two transmission strategies compatible with the required new broadband services and both play a key role in the design of the next generation integrated optical–wireless networks, such as 5G and Satcom networks, including on RAU (Remote Antenna Unit) new functionalities to improve their physical dimensions, employing a microelectronic layout over nanometric technologies.

scholarly journals Performance Analysis of Radio over Fiber Simulation Model using DPSK Modulation Technique

2019 ◽  
Vol 8 (2) ◽  
pp. 5117-5119
Keyword(s):  
Performance Analysis ◽  
Simulation Model ◽  
Mobile Networks ◽  
Radio Over Fiber ◽  
System Capacity ◽  
Differential Phase Shift ◽  
High Data ◽  
Large Bandwidth ◽  
Wireless Broadband ◽  
Shift Keying

In this paper, performance analysis of radio over fiber (ROF) system has been proposed to analyze the performance of the system using differential phase shift keying method. RoF Systems exhibits the unique characteristic of combining the featuring of fiber optic link and free space radio path which brings many advantages and challenges to new mobile networks. RoF systems has the provision of large bandwidth and has fewer losses for the transmission that make the ROF suitable for the future wireless broadband services and fulfill demands of high data rate. The proposed simulation model helps in improving the system capacity and their effects on the output in terms of Q factor, minimum BER is analyzed by using optisystem software.

Maximizing Power Saving for VoIP over WiMAX Systems

2016 ◽  
Vol 7 (1) ◽  
pp. 32-40 ◽  
Author(s):  
Tamer Z. Emara
Keyword(s):  
Energy Consumption ◽  
Mobile Networks ◽  
Power Saving ◽  
High Mobility ◽  
Portable Devices ◽  
Broadband Wireless ◽  
Broadband Access Networks ◽  
Mobile Stations ◽  
Wireless Broadband ◽  
The Voice

The voice-over-Internet protocol (VoIP) service is expected to be widely supported in wireless mobile networks. Mobile Broadband Wireless networks VoIP service to users with high mobility requirements, connecting via portable devices which rely on the use of batteries by necessity. Energy consumption significantly affects mobile subscriber stations in wireless broadband access networks. Efficient energy saving is an important and challenging issue because all mobile stations are powered by limited battery lifetimes. Therefore, the authors propose an adaptive mechanism suitable for VoIP service with silence suppression. The proposed mechanism was examined with a computer simulation. The simulation results demonstrate that the proposed mechanism reduces energy consumption.

scholarly journals IMPLEMENTATION OF CHORDAL RING NETWORK TOPOLOGY TO ENHANCE THE PERFORMANCE OF WIRELESS BROADBAND NETWORK

2021 ◽  
pp. 11-18
Author(s):  
Nibras Habeeb Attrah ◽  
Ghassan H. Abdul-Majeed ◽  
Mahmood Zaki Abdullah
Keyword(s):  
Network Topology ◽  
Optical Network ◽  
Data Rate ◽  
Ring Network ◽  
High Data ◽  
Broadband Network ◽  
Wireless Broadband ◽  
Distance Vector ◽  
Wireless Broadband Network ◽  
Chordal Ring

The expansion of networks involved higher jump on the users utilizing the networks resources, which may require extra higher bandwidth. Due to the development of technology especially those folded under the Internet of Things (IoT), the new demand of higher data rate is been witnesses among the users. In order to feed the demand of users with high data rate, broadband networks are required where high data rate can be ensured for each user. Broadband networks can be established using optical network that carries the data through wide broadband. Areas such as rural and forests sides which are witnessing plenty of natural obstacles such as mountains, trees, seas, etc. are forming big challenge for propagating a cable (wire) or optical network. Due to the limitations of the wire network, World Interoperability for Microwave Access (WiMAX) technology has been introduced as substitution for the broadband network. Such kind of alternative can be deployed through any geographical area without concerning on the wire paths. WiMAX preserved large coverage area and hence it may not suffer from the signal hand-off as in the case of another wireless network. In this project, Chordal Ring network topology is implemented to enhance the performance of wireless broadband network. With different routing protocols such as Destination Sequenced Distance Vector Protocol (DSDV) and Ad hoc On Demand Distance Vector (AODV), the network performance was examined for various Chordal Ring degree (e.g. fourth degree and fifth degree). Performance metrics such as number of transmitted packets, number of received packers, delivered packet rate (PDR), total number of drop packers (DP) and average queuing delay (been measured). Finally, the obtained results had been shown that fifth-degree Chordal Ring network is outperforming through DSDV routing protocol

scholarly journals Analog Radio Over Fiber Aided C-RAN: Optical Aided Beamforming for Multi-User Adaptive MIMO Design

2021 ◽  
Vol 2 ◽  
Author(s):  
Yichuan Li ◽  
Salman Ghafoor ◽  
Muhammad Fasih Uddin Butt ◽  
Mohammed El-Hajjar
Keyword(s):  
Mobile Networks ◽  
High Performance ◽  
Transmission Rate ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Multiple Input Multiple Output ◽  
Radio Over Fiber ◽  
Phase Shifters ◽  
Implementation Challenges ◽  
High Data

Given the increasing demand for high data-rate, high-performance wireless communications services, the demand on the radio access networks (RAN) has been increasing significantly, where optical fiber has been widely used both for the backhaul and fronthaul. Additionally, advances in signal processing such as multiple-input multiple-output (MIMO) techniques, have improved the performance as well as transmission rate of communications networks. Beamforming has been used as an efficient MIMO technique for providing a signal to noise ratio (SNR) gain as well as reducing the multi-user interference. However, beamforming requires the employment of phase-shifters, which suffers from reduced phase resolutions, degraded noise figures as well as beam-squinting in addition to the implementation challenges. Hence, in this paper we employ an analogue radio over fiber (A-RoF) aided architecture for supporting the requirements of the current and future mobile networks, where we design a photonics aided beamforming technique in order to eliminate the bulky electronic phase-shifters and the beam-squinting effect, while also providing a low-cost RAN solution. Additionally, this photonics aided beamforming is combined with a reconfigurable multi-user MIMO technique, where users can communicate with one or multiple remote radio heads (RRHs), while employing stand-alone beamforming, beamforming combined with diversity or with multiplexing depending on the available resources and the user channel information as well as the quality of service requirements.

Microscopic studies of fast phase transformations in GeSbTe films

2001 ◽  
Vol 674 ◽  
Author(s):  
Ralf Detemple ◽  
Inés Friedrich ◽  
Walter Njoroge ◽  
Ingo Thomas ◽  
Volker Weidenhof ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Data Transfer ◽  
Optical Measurements ◽  
Transfer Rates ◽  
Force Microscopy ◽  
High Data ◽  
Atomic Force ◽  
Transmission Electron ◽  
Future Success ◽  
Microscopic Studies

ABSTRACTVital requirements for the future success of phase change media are high data transfer rates, i.e. fast processes to read, write and erase bits of information. The understanding and optimization of fast transformations is a considerable challenge since the processes only occur on a submicrometer length scale in actual bits. Hence both high temporal and spatial resolution is needed to unravel the essential details of the phase transformation. We employ a combination of fast optical measurements with microscopic analyses using atomic force microscopy (AFM) and transmission electron microscopy (TEM). The AFM measurements exploit the fact that the phase transformation from amorphous to crystalline is accompanied by a 6% volume reduction. This enables a measurement of the vertical and lateral speed of the phase transformation. Several examples will be presented showing the information gained by this combination of techniques.

Miniature Two-Axis Actuator for High-Data-Transfer-Rate Optical Data Storage System

2002 ◽  
Vol 41 (Part 1, No. 3B) ◽  
pp. 1804-1807 ◽  
Author(s):  
Gakuji Hashimoto ◽  
Hiroki Shima ◽  
Kenji Yamamoto ◽  
Tsutomu Maruyama ◽  
Takashi Nakao ◽  
...  
Keyword(s):  
Data Storage ◽  
Transfer Rate ◽  
Data Transfer ◽  
Storage System ◽  
Optical Data Storage ◽  
Optical Data ◽  
Data Transfer Rate ◽  
High Data ◽  
Data Storage System

WIRELESS LOCAL AREA NETWORKS IN A PERSONALIZED EMERGENCY RESCUE MANAGEMENT SYSTEM

2021 ◽  
pp. 44583362-44583362
Author(s):  
В.К. САРЬЯН ◽  
А.И. ПАРАМОНОВ ◽  
А.С. ВИКУЛОВ ◽  
Р.М. ЯКУБОВСКИЙ
Keyword(s):  
Ad Hoc ◽  
Local Area ◽  
Network Stability ◽  
Original Solution ◽  
Control Center ◽  
Broadband Access Networks ◽  
Emergency Rescue ◽  
System Service ◽  
Wireless Broadband ◽  
Individualized Management

Анализируются возможности использования локальных беспроводных сетей широкополосного доступа в системах управления спасением людей в чрезвычайных ситуациях. Рассматриваются методы локализации пользователей, оказавшихся в опасных условиях, а также способы повышения доступности информации о них для передачи в центр управления спасением и уровня информированности самих пользователей о планах центра по их спасению. Предлагается оригинальное решение, позволяющее выполнять локализацию поэлементно, т. е. в помещениях и на отдельных участках области обслуживания системы. Показано, что решение может быть успешно использовано для организации сетевой инфраструктуры объектовой части глобальной экспертной системы, обеспечивающей доступ массового абонента в любое время и в любом месте к услуге индивидуализированного управления спасением абонентов при возникновении чрезвычайной ситуации природного или техногенного происхождения. Представлены методы повышения устойчивости сети, в частности метод построения одноранговой ad-hoc-сети с использованием коммуникаций устройство-устройство. The article analyzes the possibilities of using local wireless broadband access networks in emergency management systems for rescue people. Methods of localization of users in dangerous conditions, ways of increasing the availability of information about them for the rescue control center, as well as the level of awareness of the users themselves about the plans of the center for their rescue are considered. It is proposed the original solution, that allows localization to be performed element by element, i.e. in rooms and certain areas of the system service area. It is shown that the solution can be successfully used to organize the network infrastructure of the facility part of the global expert system, which provides mass subscriber access at any time and in any place to the service of individualized management of the rescue of subscribers in case of natural or man-made disasters. Methods for enhancing network stability are presented, in particular, a method for constructing a peer-to-peer ad-hoc network using device-to-device communications.

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