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Journal articles on the topic 'High-speed optical communication networks'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Barry, J. R., J. M. Kahn, E. A. Lee, and D. G. Messerschmitt. "High-speed nondirective optical communication for wireless networks." IEEE Network 5, no. 6 (November 1991): 44–54. http://dx.doi.org/10.1109/65.103810.

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Malik, Deepak, Geeta Kaushik, and Amit Wason. "Performance Evaluation of Optical Amplifiers for High-Speed Optical Networks." Journal of Optical Communications 41, no. 1 (December 18, 2019): 15–21. http://dx.doi.org/10.1515/joc-2017-0133.

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Abstract Optical networks were invented by the developing and developed nations in order to extend the capacity required for communication systems in a worthwhile way. In this paper, the attempt is done to improve the capacity and performance of semiconductor optical amplifier, Raman and erbium-doped fiber amplifier (EDFA) amplifiers used in optical networks. The potential of different optical amplifiers operating at 8×10 Gbps has been examined and their performance was compared on behalf of different parameters, viz. eye opening, eye closure, jitter, quality factor and transmission distances. It was observed that EDFA provided the consistent good quality of communication for long-distance transmission up to 150 km along with better eye opening and eye closure with acceptable jitter performance. Further, it is observed on the basis of quality factor and bit error rate that EDFA gives comparably better performance than Raman amplifier. Moreover, it is seen that as the data rate of the system increases, the quality of communication signals starts decreasing.

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P., Karrupusamy. "MIMO BASED HIGH SPEED OPTICAL FIBER COMMUNICATION SYSTEM." December 2019 2019, no. 02 (December 29, 2019): 107–16. http://dx.doi.org/10.36548/jei.2019.2.006.

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As the telecommunication services totally relies on the optical fiber for extending communications, it necessary that the optical communication system be capable of handling high speed, multiple channels and long haul signal transmission. recently the emergence of the optical coherent 100 GB/s and the digital signal processing has made possible the perfect signal transmission even for the MIMO (multiple input multiple output system) as they are well reformed to permit multiple wireless signal that holds different carrier frequencies. So the optical fiber system has become prominent among the applications like, large universities, banks and other private networks. However the speed in the transmission of the multiple wireless signals through single cable experiences performance issues in terms of speed, so the proposed method utilizes the 60 GHz, radio over fiber MIMO with effective spectrum allocation and the return zero differential phase shift keying to improve the communication speed and suppress the crosstalk respectively. The proposed system enriches the seamless communication with the QPSK-OFDM MIMO channels achieving 85 % in the data transmission rate, reducing the error correction rate to 5%.

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Malik, Deepak, Geeta Kaushik, and Amit Wason. "Performance Optimization of Optical Amplifiers for High Speed Multilink Optical Networks using Different Modulation Techniques." Journal of Optical Communications 40, no. 4 (October 25, 2019): 333–40. http://dx.doi.org/10.1515/joc-2017-0090.

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Abstract Next generation optical networks require large capacity communication networks for proper utilization of gain bandwidth of the networks. Optical amplifiers with wavelength division multiplexed (WDM) systems are the key technologies for the realization of these networks. In this paper, we have investigated the performance of the networks using different modulation techniques, such as return-to-zero (RZ), non-return-to-zero (NRZ) and duobinary. Attempts were taken to design 8 channels, 10 Gbps WDM network at channel spacing of 0.8 nm. An innovative model with EDFA-Raman amplifier is designed to examine the performance of the different modulation schemes. From the results, it is found that NRZ configuration gives maximum output power and good quality of communication as compared to other modulation schemes. Further, it is seen that with increase in channel dispersion from 2 to 4 ps/nm/km, the quality of the signal started decreasing.

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Singh, Rajbir. "Analysis of Inter-Satellite Optical Wireless Communication System." International Journal of Advanced Research in Computer Science and Software Engineering 7, no. 10 (October 30, 2017): 10. http://dx.doi.org/10.23956/ijarcsse.v7i10.267.

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Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.

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Zaki Rashed, Ahmed Nabih. "Submarine Optical Fiber Cable Systems for High Speed Growth Developments in Optical Communication Networks." International Journal of Information Engineering and Electronic Business 4, no. 3 (July 1, 2012): 49–63. http://dx.doi.org/10.5815/ijieeb.2012.03.07.

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Wang, Ke, Ampalavanapillai Nirmalathas, Christina Lim, and Efstratios Skafidas. "High-speed duplex optical wireless communication system for indoor personal area networks." Optics Express 18, no. 24 (November 17, 2010): 25199. http://dx.doi.org/10.1364/oe.18.025199.

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Khallaf, Haitham S., Ahmed E. Morra, Abdulaziz E. Elfiqi, Hossam M. H. Shalaby, and Steve Hranilovic. "Hybrid two-level MPPM–MDPSK modulation for high-speed optical communication networks." Applied Optics 58, no. 36 (December 11, 2019): 9757. http://dx.doi.org/10.1364/ao.58.009757.

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Raghunathababu and Siddaiah P. "ELECTRO OPTIC MODULATOR DEVICES FOR HIGH SPEED DATA IN OPTICAL COMMUNICATION." International Journal of Research -GRANTHAALAYAH 3, no. 10 (October 31, 2015): 38–42. http://dx.doi.org/10.29121/granthaalayah.v3.i10.2015.2930.

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Electro Optic devices in fiber optic Communication systems are playing a Vital Role in telecommunication infrastructure for worldwide broadband networks. Wide bandwidth of signal transmission with low delay, wide transmission bandwidth with less latency, the transmission medium for long distance with high data rate transmission. This paper gives an overview of Electro optic devices for fiber optic systems and their key technologies, their technological trend towards the next generation.

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10

Hariyale, Ashish. "Spectral Coding System for High Speed Optical Communication Network." International Journal for Research in Applied Science and Engineering Technology 6, no. 7 (July 31, 2018): 281–86. http://dx.doi.org/10.22214/ijraset.2018.7038.

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11

Yang, Chao-Chin. "High speed and secure optical CDMA-based passive optical networks." Computer Networks 53, no. 12 (August 2009): 2182–91. http://dx.doi.org/10.1016/j.comnet.2009.04.004.

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Durcek, Viktor, Michal Kuba, and Milan Dado. "Channel Coding in Optical Communication Systems." Transport and Communications 4, no. 2 (2016): 1–5. http://dx.doi.org/10.26552/tac.c.2016.2.1.

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In this paper, an overview of various types of error-correcting codes is present. Three generations of forward error correction methods used in optical communication systems are listed and described. Forward error correction schemes proposed for use in future high-speed optical networks can be found in the third generation of codes.

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Nakazawa, Masataka. "Proposal of multifunctional coherent Nyquist pulse and ultra-high-speed and high-efficiency optical transmission technology." Impact 2020, no. 2 (April 15, 2020): 18–20. http://dx.doi.org/10.21820/23987073.2020.2.18.

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A cornerstone of technological advancement in the last century has been the development of ever faster and higher capacity telecommunications. Being able to transmit large amounts of information, at a good rate over long distances is essential for running many of the services, business and industries that we all rely upon. The development of large national and international telecommunication networks underpins the internet and, with it, the World Wide Web. All this powers a huge range of diverse activities as security services, the entertainment industry, national health services and distribution. As more and more people are connected to this network and more and more information is transmitted between these people, the capacity of the network must increase. This can broadly be split into two categories: access – the laying of cables and construction of mobile towers, technology – the creation of improved data transmitting methods that can transmit more data, at a faster rate, further away. The former is a question of private enterprise and public policy, the latter is the domain of engineers and physicists. Professor Masataka Nakazawa, who is based at the Research Institute of Electrical Communication, Tohoku University in Japan, is a world-leading expert in optical telecommunications. Nakazawa and his team have a mission to create new methods through which data can be transmitted using optical networks, recently they have consistently broken records for speed, capacity and efficiency in their cutting-edge optical communication technologies.

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Zhang, Ning, and Xue Mei Xu. "New Structure of Communication System for WDM Optical Network." Advanced Materials Research 219-220 (March 2011): 1321–24. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.1321.

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In recent years, optical network has made great progress. Optical networking architects were concerned with medium access control protocols for optical switching, the combination of wavelength conversion, and optimum forms of network. How to apply the simple high-speed transfer function of the optical network node to the IP network is an important issue in achieving an IP and optical integrated network. In this paper, we present a new node structure which has a new function. Adding new nodes to a optical network based on this new design, we can make a connection to different network. It is important to provide solutions for various requirements such as integrated optical network scalability and support for various types of networks in an optical network.

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Mao, Zhi Jie, Jiang Tao Wei, Hong Wei Li, Qiong Wu, and Feng Chen Qian. "Physical Layer Security Solutions for High Speed Data Networks." Advanced Materials Research 712-715 (June 2013): 2514–20. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.2514.

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To improve the confidentiality and availability of the network, it is important to provide multilevel security in the physical layer of optical networks. Based on the orthogonal characterization of OFDM, we introduce a new electronic encryption method for the encryption of the subcarriers symbols after data mapping. Since all-optical networks are emerging as implementations for very high data rate communications, flexible switching and broadband application support, we present a novel all-optical security system technique using random sequence encryption. The noise function was applied via a pseudo-random noise generator seeded with an encryption key. We analyze the performance of both security systems under different application circumstances. Our results confirm the effectiveness of the security technique to make the system less vulnerable to attack.

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16

Guo, Duanyang, Yechiam Yemini, Zhensheng Zhang, and Wei Guo. "Scalable High-Speed Protocols for WDM Optical Star Networks." Journal of High Speed Networks 4, no. 4 (1995): 341–60. http://dx.doi.org/10.3233/jhs-1995-4403.

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WANG, Xu-hui, Zhao-dan WANG, and Xiong-jian LIANG. "Research on PMD compensation in high-speed optical fiber communication network." Journal of China Universities of Posts and Telecommunications 20 (December 2013): 152–55. http://dx.doi.org/10.1016/s1005-8885(13)60203-4.

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Jaber, Atta Takhum, Soudad S. Ahmed, and Shehab Ahmed Kadhim. "Next Generation of High-Speed Optical Communications Networks Using OFDM Technology." Journal of Physics: Conference Series 1591 (July 2020): 012092. http://dx.doi.org/10.1088/1742-6596/1591/1/012092.

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Murgod, Tejaswini R., and S. Meenakshi Sundaram. "Survey on underwater optical wireless communication: perspectives and challenges." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 1 (January 1, 2019): 138. http://dx.doi.org/10.11591/ijeecs.v13.i1.pp138-146.

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<div><p class="Affiliation">The demand for underwater communication is growing at a faster pace since few decades. Maximizing the communication performance and building efficient network architecture for underwater communication is a challenging task. Due to the reduced bandwidth, high error rate, noise, propagation delay, water currents and increased cost in the network topology, the existing communication techniques are not feasible for underwater communication. Research in high speed underwater transmission technology has become a primary need in today’s world. By using underwater acoustic sensor network high transmission distance can be achieved but with lower data rates, high power consumption, larger delays and with higher cost. Underwater Optical Communication can be used to increase data rates and lower delays but it suffers from high attenuation due to which it cannot be used for data transfer over larger distances. Research in the area of hybrid sensor networks is a challenging task and has many open research challenges, which needs to be solved. In this paper we discuss the various architectures of underwater communication. A comparative study is made on different routing protocols and localization algorithms. The challenges faced by acoustic and optical communication are also discussed.</p></div>

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20

Huszaník, Tomáš, Ján Turán, and Ľuboš Ovseník. "Demonstration of Multimode Optical Fiber Communication System using 1300 nm Directly Modulated VCSEL for Gigabit Ethernet." Infocommunications journal, no. 2 (2018): 26–32. http://dx.doi.org/10.36244/icj.2018.2.4.

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In the recent years, the optical networks have grown to unexpected dimensions. The growth of active users and growing demand for data services set high requirements to network providers. Driving forces of this growth are multimedia, cloud computing and web services which set high bandwith demand. The majority of currently deployed optical networks utilize passive or active network structure using dominantly singlemode optical fiber (SMF). SMF is believed to be the better choice over multimode optical fiber (MMF) for high speed optical fiber communication systems. And in some applications it definitely is. MMF has found use especially for short distance communication as it easily supports distances required for interconnecting building, data centres or campuses. In this paper we present a simulation model of 1000BASE-LX Ethernet with MMF using different optical modulation techniques. The aim of this article is to demonstrate possibilities of MMF based 1000BASE-LX Ethernet with directly modulated vertical-cavity surface-emitting laser (VCSEL).

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21

Hagimoto, Kazuo, and Koh-Ichi Aoyama. "High-speed optical transmission systems using optical fiber amplifiers." Electronics and Communications in Japan (Part I: Communications) 76, no. 6 (1993): 57–76. http://dx.doi.org/10.1002/ecja.4410760606.

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22

Masetti, F., J. Benoit, F. Brillouet, J. M. Gabriagues, A. Jourdan, M. Renaud, D. Bottle, et al. "High speed, high capacity ATM optical switches for future telecommunication transport networks." IEEE Journal on Selected Areas in Communications 14, no. 5 (June 1996): 979–98. http://dx.doi.org/10.1109/49.510922.

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23

Islam, Tadbirul, and Mohammad Nasir Uddin. "High Speed OTDM-DWDM Bit Compressed Network for Long-Haul Communication." AIUB Journal of Science and Engineering (AJSE) 18, no. 2 (August 31, 2019): 57–65. http://dx.doi.org/10.53799/ajse.v18i2.41.

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This paper represents an optical communication network design that incorporates both OTDM and DWDM techniques which provides up to 240 Gbit/s data transfer rate, long-haul communication distance of 2700 km with a maximum number of 384 channels in this designed architecture. Each channel has a bitrate of 625 Mbit/s that follows optical signal hierarchy OC-12, STS-12 (SONET ANSI), and STM-4 (SDH CCITT), and the design maintains standard parameters for commercially available channel grids at 100 GHz spacing. The communication is done by Single Mode Fiber (SMF) of 50 km and Dispersion Compensating Fiber (DCF) of 10 km followed by one optical amplifier gain in each span. Bit error rate (BER) remains significantly low while transmission distance for only OTDM is 18000 km at a BER < 10-12, and for the hybrid OTDM-DWDM it is 2700 km at a BER < 10-16. Both values are measured under 128 bits sequence length. Three compression stages are used for 8 channels each in order to minimize the gap between bits, and to utilize the space for more channels within a specific time window.

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Koonen, Ton, Ketemaw Mekonnen, Zizheng Cao, Frans Huijskens, Ngoc Quan Pham, and Eduward Tangdiongga. "Ultra-high-capacity wireless communication by means of steered narrow optical beams." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2169 (March 2, 2020): 20190192. http://dx.doi.org/10.1098/rsta.2019.0192.

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The optical spectrum offers great opportunities to resolve the congestion in radio-based communication, aggravated by the booming demand for wireless connectivity. High-speed infrared optical components in the 1500 nm window have reached high levels of sophistication and are extensively used already in fibre-optic networks. Moreover, infrared light beyond 1400 nm is eye-safe and is not noticeable by the users. Deploying steerable narrow infrared beams, wireless links with huge capacity can be established to users individually, at minimum power consumption levels and at very high levels of privacy. Fully passive diffractive optical modules can handle many beams individually and accurately steer narrow beams two-dimensionally by just remotely tuning the wavelength of each beam. The system design aspects are discussed, encompassing the beam-steering transmitter, wide field-of-view optical receiver and the localization of the user's wireless devices. Prototype system demonstrators are reported, capable of supporting up to 128 beams carrying up to 112 Gbit s −1 per beam. Hybrid bidirectional systems which use a high-speed downstream optical link and an upstream radio link at a lower speed can provide powerful asymmetric wireless connections. All-optical bidirectional beam-steered wireless communication will be able to offer the ultimate in wireless capacity to the user while minimizing power consumption. This article is part of the theme issue ‘Optical wireless communication’.

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GARG, AMIT KUMAR, and R. S. KALER. "HYBRID CONTENTION RESOLUTION SCHEMES FOR OPTICAL BURST SWITCHED HIGH-SPEED NETWORKS." Journal of Interconnection Networks 10, no. 01n02 (March 2009): 121–32. http://dx.doi.org/10.1142/s0219265909002467.

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Optical burst switching (OBS) has attracted interest as a transport network architecture for the future optical Internet. However, many challenging issues have to be solved in order to pave the way for an effective implementation of OBS. Contention, which may occur when two or more bursts compete for the same wavelength on the same link, is a critical issue. This paper compares the basic and hybrid contention resolution strategies with respect to burst loss probability and end-to-end transfer delay. The simulation results show that hybrid techniques lead an effective reduction of the burst average loss rate compared to existing techniques. It is also observed that a significant differentiation with regard to burst loss has been achieved, when burst priorities are considered.

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Sadler, Daniel J. "Optoelectronic multichip modules for high-speed computer systems and communication networks." Optical Engineering 36, no. 5 (May 1, 1997): 1319. http://dx.doi.org/10.1117/1.601345.

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Kim, Yong-Jin, Kwang-Heon Kim, Yong-Seon Moon, and Young-Chul Bae. "Bi-Directional Optical-EtherCAT Communication for Motion Network Control of Humanoid Robot." International Journal of Humanoid Robotics 11, no. 04 (December 2014): 1442006. http://dx.doi.org/10.1142/s0219843614420067.

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Currently, most industrial automation systems and robotic systems require the high-speed transmission of data and highly precise control. We introduce a new communication protocol that is immune to the electromagnetic compatibility (EMC) effect, and is able to reduce the space used in internal robots with limited space. In this paper, we present a novel optical-EtherCAT communication method to reduce EMC, to provide high-speed communication between each module, and to offer real-time control and flexible topology in the internal robot. Then, we verify the communication performance between the proposed optical-EtherCAT communication and previously established EtherCAT communication method. We use the transmission speed, frame size, usage rates of bandwidth, update speed, and cycle time of transmission as evaluation criteria.

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Abumarshoud, Hanaa, Cheng Chen, Mohamed Sufyan Islim, and Harald Haas. "Optical wireless communications for cyber-secure ubiquitous wireless networks." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, no. 2242 (October 2020): 20200162. http://dx.doi.org/10.1098/rspa.2020.0162.

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Wireless connectivity is no longer limited to facilitating communications between individuals, but is also required to support diverse and heterogeneous applications, services and infrastructures. Internet of things (IoT) systems will dominate future technologies, allowing any and all devices to create, share and process data. If artificial intelligence resembles the brain of IoT, then high-speed connectivity forms the nervous system that connects the devices. For IoT to safely operate autonomously, it requires highly secure and reliable wireless links. In this article, we shed light on the potential of optical wireless communications to provide high-speed secure and reliable ubiquitous access as an enabler for fifth generation and beyond wireless networks.

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DANG, LE KHOA, HUU PHUONG NGUYEN, LE NGUYEN BINH, and DUC NHAN NGUYEN. "SIMULINK MODEL AND FPGA-BASED OFDM COMMUNICATION SYSTEM: A SIMULATION AND HARDWARE INTEGRATED PLATFORM." International Journal of Modeling, Simulation, and Scientific Computing 01, no. 03 (September 2010): 369–404. http://dx.doi.org/10.1142/s1793962310000250.

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Ultra-broadband networks are currently attracting significant interests in employing wireless access and optical fiber access to the home and to the building at symbol rate reaching Gb/s. OFDM is a multicarrier modulation technique and considered to offer significant reduction of the data symbol to be carried per carrier channel, especially in ultra-high speed optical communications with bit rate reaching 100 Gb/s or even higher. This paper thus presents a novel and generic OFDM system employing both MATLAB Simulink and FPGA-based development software platform for simulation as well as hardware implementation for the generation and detection of OFDM signals for wireless and optical communications transmission media. Although the transmission medium is modeled with delay distortion filter in the baseband, this model would be valid for passband signals as the amplitude is represented by complex amplitude whose phase would be the phase of the carrier. The Simulink and hardware models presented hereunder are scalable to much higher speed allowing possible implementation in multi-Giga samples per second electronic processors. The sub-systems of the OFDM transmitter and receiver are presented to demonstrate the feasibility of such models for ultra-wideband communication systems such as wireless access and long haul optical fiber communication backbone networks.

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Zhong, Wen-De, Ziwen Lian, Sanjay Kumar Bose, and Yixin Wang. "Optical resilient Ethernet rings for high-speed MAN networks [Invited]." Journal of Optical Networking 4, no. 12 (2005): 784. http://dx.doi.org/10.1364/jon.4.000784.

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Chan, Kai Choong, Holden Ho Yuen Cheng, Hai Feng Liu, and Khawaja Aamer Ahmed. "Application of Optical Solitons in High-Speed and Wavelength-Division-Multiplexed Lightwave Communication Systems." Journal of High Speed Networks 4, no. 1 (1995): 41–59. http://dx.doi.org/10.3233/jhs-1995-4104.

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Venkatesh, T., K. Praveen, T. Lakshmi Sujatha, and C. Siva Ram Murthy. "Performance evaluation of high speed TCP over optical burst switching networks." Optical Switching and Networking 4, no. 1 (February 2007): 44–57. http://dx.doi.org/10.1016/j.osn.2006.09.005.

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Wang, Jingjing, Jie Shen, Wei Shi, Gang Qiao, Shaoen Wu, and Xinjie Wang. "A Novel Energy-Efficient Contention-Based MAC Protocol Used for OA-UWSN." Sensors 19, no. 1 (January 7, 2019): 183. http://dx.doi.org/10.3390/s19010183.

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A hybrid optical-acoustic underwater wireless sensor network (OA-UWSN) was proposed to solve the problem of high-speed transmission of real-time video and images in marine information detection. This paper proposes a novel energy-efficient contention-based media access control (MAC) protocol (OA-CMAC) for the OA-UWSN. Based on optical-acoustic fusion technology, our proposed OA-CMAC combines the postponed access mechanism in carrier sense multiple access with collision avoidance (CSMA/CA) and multiplexing-based spatial division multiple access (SDMA) technology to achieve high-speed and real-time data transmission. The protocol first performs an acoustic handshake to obtain the location information of a transceiver node, ensuring that the channel is idle. Otherwise, it performs postponed access and waits for the next time slot to contend for the channel again. Then, an optical handshake is performed to detect whether the channel condition satisfies the optical transmission, and beam alignment is performed at the same time. Finally, the nodes transmit data using optical communication. If the channel conditions do not meet the requirements for optical communication, a small amount of data with high priority is transmitted through acoustic communication. An evaluation of the proposed MAC protocol was performed with OMNeT++ simulations. The results showed that when the optical handshaking success ratio was greater than 50%, compared to the O-A handshake protocol in the literature, our protocol could result in doubled throughput. Due to the low energy consumption of optical communication, the node’s lifetime is 30% longer than that of pure acoustic communication, greatly reducing the network operation cost. Therefore, it is suitable for large-scale underwater sensor networks with high loads.

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Huszaník, Tomáš, Ján Turán, and Ľuboš Ovseník. "Realization of a Long-haul Optical Link with Erbium Doped Fiber Amplifier." Carpathian Journal of Electronic and Computer Engineering 11, no. 2 (December 1, 2018): 44–49. http://dx.doi.org/10.2478/cjece-2018-0018.

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Abstract The need for high capacity and bandwidth in broadband communication systems increased rapidly in a few past years. Optical fiber is now the major transmission medium for fast and reliable communication replacing the old copper-based connections. However, with the deployment of optical networks, number of problems arise. The main problem of optical networks is the amplification in the long-distance transmission. Erbium doped fiber amplifier (EDFA) is the leading technology in the field of optical amplifiers. It uses erbium doped fiber to amplify optical signal. The importance of amplification in optical domain is relevant in long-haul and high-speed transmission systems. In this paper the study of the EDFA is presented. Based on an analytical study, the simulation model of the EDFA is created. The main aim is to determine the optimal parameters of the EDFA for a long-haul 16-channel DWDM (Dense Wavelength Division Multiplexing) system. The performance of the proposed DWDM system is mathematically analyzed using BER (Bit Error Rate) and Q factor.

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Khalil, Ruhul Amin, Mohammad Inayatullah Babar, Nasir Saeed, Tariqullah Jan, and Ho-Shin Cho. "Effect of Link Misalignment in the Optical-Internet of Underwater Things." Electronics 9, no. 4 (April 15, 2020): 646. http://dx.doi.org/10.3390/electronics9040646.

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Underwater wireless optical communication (UWOC) enables high-speed links in water for the optical Internet of Underwater Things (O-IoUT) networks. O-IoUT provides various marine applications, including ocean exploration, environmental monitoring, and underwater navigation. O-IoUT typically utilizes light-emitting diodes (LEDs) and different laser diodes (LDs) such as green/blue lasers to achieve efficient data communication in the underwater environment. The high-speed optical communication is limited up to a few tens of meters due to underwater channel impairments and misalignment between the transmitter (Tx) and the receiver (Rx). UWOC provides high-speed communications only in the line of sight conditions, and a small misalignment between the Tx and the Rx can degrade the system performance. In an attempt to understand and minimize this misalignment issue, we investigate how received power in a UWOC system depends on the transmitted beam’s divergence angle. Simulation results are provided to show the effectiveness of the study by comparing the plane, Gaussian, and spherical beams. Monte Carlo simulations are utilized to determine the maximum allowable lateral offset between Tx and Rx for a given Tx divergence angle. The results provide an overview and design-based trade-off between different parameters such as lateral offset, the power received, and bandwidth of the channel. The proposed method improves not only the maximum allowed link-span but also the bandwidth of the channel for a given transmission distance.

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Kojic, Nenad, Irini Reljin, and Branimir Reljin. "Neural network for optimization of routing in communication networks." Facta universitatis - series: Electronics and Energetics 19, no. 2 (2006): 317–29. http://dx.doi.org/10.2298/fuee0602317k.

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The efficient neural network algorithm for optimization of routing in communication networks is suggested. As it was known from literature different optimization and ill-defined problems may be resolved using appropriately designed neural networks, due to their high computational speed and the possibility of working with uncertain data. Under some assumptions the routing in packet-switched communication networks may be considered as optimization problem, more precisely, as a shortest-path problem. The Hopfield-type neural network is a very efficient tool for solving such problems. The suggested routing algorithm is designed to find the optimal path, meaning, the shortest path (if possible), but taking into account the traffic conditions: the incoming traffic flow, routers occupancy, and link capacities, avoiding the packet loss due to the input buffer overflow. The applicability of the proposed model is demonstrated through computer simulations in different traffic conditions and for different full-connected networks with both symmetrical and non-symmetrical links.

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Brosio, A., F. Gagliardi, L. Lambarelli, G. Panarotto, D. Roffinella, and M. Sposini. "A Reconfigurable High-Speed Optical System for Integrated Local Communications." IEEE Journal on Selected Areas in Communications 3, no. 6 (November 1985): 825–34. http://dx.doi.org/10.1109/jsac.1985.1146280.

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O'Brien, D. C., G. E. Faulkner, Kalok Jim, E. B. Zyambo, D. J. Edwards, M. Whitehead, P. Stavrinou, et al. "High-speed integrated transceivers for optical wireless." IEEE Communications Magazine 41, no. 3 (March 2003): 58–62. http://dx.doi.org/10.1109/mcom.2003.1186546.

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WANG, Ke, Ampalavanapillai NIRMALATHAS, Christina LIM, and Efstratios SKAFIDAS. "High-Speed Full-Duplex Optical Wireless Communication System with Single Channel Imaging Receiver for Personal Area Networks." IEICE Transactions on Electronics E96.C, no. 2 (2013): 180–86. http://dx.doi.org/10.1587/transele.e96.c.180.

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Pham, Thu A., Lam T. Vu, and Ngoc T. Dang. "Bidirectional Relaying MMW Radio over Plastic Optical Fiber Systems in Home Area Networks." Journal of Science and Technology: Issue on Information and Communications Technology 4, no. 1 (September 30, 2018): 21. http://dx.doi.org/10.31130/jst.2018.63.

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In this paper, we propose a novel home area networks (HAN) architecture using MMW radio-over-plastic optical fiber (MMW/RoPOF) to provide high-speed wireless connections to end users. The proposed HAN can support bidirectional half-duplex communication between any pair of mobile stations (MSs) thanks to the use of analog network coding in optical domain implemented at a center station (CS). We analyze the performance of an end-to-end communication link between two MSs under the impact of major physical impairments originated from both fiber and wireless links. The numerical results in terms of bit error rate (BER) and normalized throughput demonstrate that it is feasible to deploy MMW/RoPOF in HAN. In addition, useful information for the design of HAN can be obtained from this paper.

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Hamdi, M., H. J. Chao, D. J. Blumental, E. Leornardi, Chumming Qiao, K. Y. Yun, and R. Ramaswami. "Guest editorial high-performance optical switches/routers for high-speed internet." IEEE Journal on Selected Areas in Communications 21, no. 7 (September 2003): 1013–17. http://dx.doi.org/10.1109/jsac.2003.815677.

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Chen, Zhaoyu, Yanheng Liu, Geng Sun, Xu Zhou, Boyu Li, Shuang Liang, and Qianyu Zhou. "Planning Optimization of the Distributed Antenna System in High-Speed Railway Communication Network Based on Improved Cuckoo Search." International Journal of Antennas and Propagation 2018 (2018): 1–14. http://dx.doi.org/10.1155/2018/3641286.

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The network planning is a key factor that directly affects the performance of the wireless networks. Distributed antenna system (DAS) is an effective strategy for the network planning. This paper investigates the antenna deployment in a DAS for the high-speed railway communication networks and formulates an optimization problem which is NP-hard for achieving the optimal deployment of the antennas in the DAS. To solve this problem, a scheme based on an improved cuckoo search based on dimension cells (ICSDC) algorithm is proposed. ICSDC introduces the dimension cell mechanism to avoid the internal dimension interferences in order to improve the performance of the algorithm. Simulation results show that the proposed ICSDC-based scheme obtains a lower network cost compared with the uniform network planning method. Moreover, ICSDC algorithm has better performance in terms of the convergence rate and accuracy compared with the conventional cuckoo search algorithm, the particle swarm optimization, and the firefly algorithm.

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Wu, Yixin, Suman Kumar, and Seung-Jong Park. "Measurement and performance issues of transport protocols over 10Gbps high-speed optical networks." Computer Networks 54, no. 3 (February 2010): 475–88. http://dx.doi.org/10.1016/j.comnet.2009.09.017.

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CARAGIANNIS, IOANNIS, CHRISTOS KAKLAMANIS, and PINO PERSIANO. "SYMMETRIC COMMUNICATION IN ALL-OPTICAL TREE NETWORKS." Parallel Processing Letters 10, no. 04 (December 2000): 305–13. http://dx.doi.org/10.1142/s0129626400000299.

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We address the problem of allocating optical bandwidth to a set of communication requests in a tree-shaped all-optical network that utilizes Wavelength Division Multiplexing (WDM) technology. WDM technology establishes communication between pairs of nodes of the network by establishing tranceiver–receiver paths and assigning wavelengths to each path so that no two paths going through the same link use the same wavelength. Optical bandwidth is the number of distinct wavelengths. The important engineering problem to be solved is to establish communication between pairs of nodes so that the total number of wavelengths used is minimized. In this paper, we focus on a special case of the problem considering patterns of requests that are symmetric, i.e. for any transmitter–receiver pair of nodes (v1, v2) there also exists its symmetric (v2, v1). Our motivation lies in the fact that many services that are expected to be supported by high performance optical networks in the future, require bidirectional reservation of bandwidth. We prove that the problem of optimizing the number of wavelengths used is NP-hard even when the underlying network is a binary tree. We also present two interesting lower bounds.

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Wang, Zhaocheng, and Jiaxuan Chen. "Networked multiple-input-multiple-output for optical wireless communication systems." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2169 (March 2, 2020): 20190189. http://dx.doi.org/10.1098/rsta.2019.0189.

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With the escalation of heterogeneous data traffic, the research on optical wireless communication (OWC) has attracted much attention, owing to its advantages such as wide spectrum, low power consumption and high security. Ubiquitous optical devices, e.g. light-emitting diodes (LEDs) and cameras, are employed to support optical wireless links. Since the distribution of these optical devices is usually dense, multiple-input-multiple-output (MIMO) can be naturally adopted to attain spatial diversity gain or spatial multiplexing gain. As the scale of OWC networks enlarges, optical MIMO can also collaborate with network-level operations, like user/AP grouping, to enhance the network throughput. Since OWC is preferred for short-range communications and is sensitive to the directions/rotations of transceivers, optical MIMO links vary frequently and sharply in outdoor scenarios when considering the mobility of optical devices, raising new challenges to network design. In this work, we present an overview of optical MIMO techniques, as well as the cooperation of MIMO and user/AP grouping in OWC networks. In consideration of the challenges for outdoor OWC, key technologies are then proposed to facilitate the adoption of optical MIMO in outdoor scenarios, especially in vehicular ad hoc networks. Lastly, future applications of MIMO in OWC networks are discussed. This article is part of the theme issue ‘Optical wireless communication’.

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Chabata, T. V., D. Kiboi Boiyo, E. K. Rotich Kipnoo, R. R. G. Gamatham, A. W. R. Leitch, and T. B. Gibbon. "Signal monitoring and performance stability evaluation tool in a high speed optical communication network." Optik 127, no. 20 (October 2016): 9001–7. http://dx.doi.org/10.1016/j.ijleo.2016.06.085.

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Cheng, Yuh-Jiuh, Bor-Tauo Chen, Cheng-Ping Wu, and Yu-Yun Lee. "Design of Optical Tunnel Switching Networks for Big Data Applications." Applied Sciences 10, no. 6 (March 20, 2020): 2098. http://dx.doi.org/10.3390/app10062098.

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In this paper, we proposed large-scale optical tunnel switching networks based on the Torus topology network with WSS (Wavelength Selective Switch) for future big data applications. All nodes of the large-scale optical tunnel switching networks use WSS switch modules, and the communications between nodes use multiple λs (wavelengths), where a tunnel is established with a wavelength which can be reused. The widely used MEMS (Micro-Electro-Mechanical Systems) and LCoS (Liquid Crystal on Silicon) technologies are all millisecond-level switching speeds, so the frame size of the optical frame switch is very large, and this will reduce switching performance. Therefore, they are only suitable for optical tunnel switching networks design, but are not suitable for optical frame switch design. This multi-plane Torus topology network architecture not only increases network throughput, but also has fault tolerance to increase network reliability. When the traffic is changed, the number of tunnels between nodes can be scheduled in time to balance the load traffic and avoid traffic loss. Therefore, it can not only schedule the number of tunnels in time to balance the load traffic, in order to avoid traffic loss, but also because the channel is fixedly established, this does not generate any buffer delay, and this because of the transmission using optical transmission unlimited speed, so it is a good choice for future big data applications that require high speed, high bandwidth and low latency.

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PARK, YOUNG-KEUN, and VLADIMIR CHERKASSKY. "NEURAL NETWORK FOR CONTROL OF REARRANGEABLE CLOS NETWORKS." International Journal of Neural Systems 05, no. 03 (September 1994): 195–205. http://dx.doi.org/10.1142/s0129065794000219.

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Rapid evolution in the field of communication networks requires high speed switching technologies. This involves a high degree of parallelism in switching control and routing performed at the hardware level. The multistage crossbar networks have always been attractive to switch designers. In this paper a neural network approach to controlling a three-stage Clos network in real time is proposed. This controller provides optimal routing of communication traffic requests on a call-by-call basis by rearranging existing connections, with a minimum length of rearrangement sequence so that a new blocked call request can be accommodated. The proposed neural network controller uses Paull’s rearrangement algorithm, along with the special (least used) switch selection rule in order to minimize the length of rearrangement sequences. The functional behavior of our model is verified by simulations and it is shown that the convergence time required for finding an optimal solution is constant, regardless of the switching network size. The performance is evaluated for random traffic with various traffic loads. Simulation results show that applying the least used switch selection rule increases the efficiency in switch rearrangements, reducing the network convergence time. The implementation aspects are also discussed to show the feasibility of the proposed approach.

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WEBB, R. P. "OPTOELECTRONIC IMPLEMENTATION OF NEURAL NETWORKS." International Journal of Neural Systems 04, no. 04 (December 1993): 435–44. http://dx.doi.org/10.1142/s0129065793000365.

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The performance of electronic neural networks will eventually be limited by the capacity of their interconnections as operating speeds are increased. The use of optical connections to link electronic elements offers a way to overcome this problem. In particular, spatial optic techniques are especially suited to neural systems because of their parallel structure. Three experimental optoelectronic networks are described that employ holographic components and arrays of high-speed optical modulators. These networks have been used to demonstrate operation at 50 MHz, novel training algorithms and the expansion of a network to 64 × 8 connections with optical fan-out. A hybrid technique for integrating optoelectronic systems is also being developed.

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A. Eid, Mahmoud M., Abd El-Naser A. Mohammed, and Ahmed Nabih Zaki Rashed. "Different soliton pulse order effects on the fiber communication systems performance evaluation." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (September 1, 2021): 1485. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1485-1492.

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<p>The study outlined the soliton pulse order effects on the performance efficiency of the optical transceiver systems. The power after fiber is reported for various Soliton pulse order. Max optical signal power (SP) and min optical noise power (NP) are clarified versus time after optical fiber for various soliton pulse order. As well as the max electrical power amplitude against time period is demonstrated after electrical filter for various soliton pulse order. It is reported that the optical transceiver performance efficiency can be upgraded with the first soliton order pulse. The soliton technique is used for high speed communication transmission systems. Soliton technique is used to compensate the dispersion and balanced with nonlinear effects. The soliton order effects is then discussed to choose the suitable soliton order for high speed system performance efficiency. The soliton techniques can be used also for extended ultra high transmion distance with high data rates.</p>

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