scholarly journals Swift Reliability Test Methodology of 100G High-Speed, Energy-efficient Electro-Absorption Modulated Lasers (EML) for Green Datacenter Networks

2016 ◽  
Vol 3 (1) ◽  
pp. 74 ◽  
Author(s):  
Jack Jia-Sheng Huang ◽  
Yu-Heng Jan ◽  
Jesse Chang ◽  
Yi-Ching Hsu ◽  
Dawei Ren ◽  
...  
Keyword(s):  
Optical Networks ◽  
Energy Efficient ◽  
High Speed ◽  
Data Communication ◽  
Field Performance ◽  
Information Storage ◽  
Reliability Test ◽  
Data Traffic ◽  
Gigabit Ethernet ◽  
Test Methodology

High-speed transceivers are receiving great interest due to the demand for huge data traffic and information storage capacities in the Big Data era. Recently, 100 Gigabit Ethernet (100GbE) has become an IEEE standardized data communication protocol. The 100G quad small form-factor pluggable (QSFP) transceiver is one of the key technological enablers in the high-speed optical networks. In this paper, we study the reliability current dependence for the four-lambda QSFP (4x25G) EML devices that are employed in the 100G QSFP transceivers. In order to meet the energy-efficient and environmental requirements, we develop a swift reliability test methodology that can provide fast, accurate reliability assessment to ensure robust long-term field performance. We discuss the acceleration factor and extrapolation for the energy-efficient reliability test.

scholarly journals On Ultra-Reliable Low Latency Multipath TCP For Connected Autonomous Vehicles

2021 ◽  
Author(s):  
Shiva Raj Pokhrel ◽  
Neeraj Kumar ◽  
Anwar Walid
Keyword(s):  
Autonomous Vehicles ◽  
High Speed ◽  
Data Communication ◽  
Low Latency ◽  
Data Traffic ◽  
Mathematical Study ◽  
Multipath Tcp ◽  
Multiple Network ◽  
Very High ◽  
Delay Variation

Connected Autonomous Vehicles (CAVs) are Not-So-Futuristic. CAVs will be highly dynamic by intelligently exploiting multipath communication over several radio technologies, such as high-speed WiFi and 5G and beyond networks. Yet, the likelihood of data communication loss can be very high and/, or packets arrive at the destination not in correct working order due to erratic and mixed time-varying wireless links. Furthermore, the vehicular data traffic is susceptible to loss and delay variation,which recommends the need to investigate new multipath TCP(MPTCP) protocols for ultra-reliable low latency communication(URLLC) over such heterogeneous networks while reassuring CAVs’ needs. We undertake the challenge by jointly considering network coding and balanced linked adaptation for performing coupled congestion control across multiple wireless paths.Consequently, the proposed low delay MPTCP framework for connecting autonomous vehicles is efficient and intelligent by design. We conduct a rigorous convergence analysis of the MPTCP design framework. In summation, we provide a detailed mathematical study and demonstrate that the latency penalty for the URLLC-MPTCP developed over these networks becomes negligible when considering the possible benefits that multiple network convergence could offer. Our extensive emulation results demonstrate all these lucrative features of URLLC-MPTCP.

SONET/SDH, OTN, and RPR

2021 ◽  
pp. 189-232
Author(s):  
Debasish Datta
Keyword(s):  
Optical Networks ◽  
Optical Fibers ◽  
High Speed ◽  
Optical Network ◽  
Data Traffic ◽  
Ring Networks ◽  
Synchronous Digital Hierarchy ◽  
Transmission Rates ◽  
Optical Transport Network ◽  
Basic Concepts

With the emergence of high-speed optical transmission, the pre-existing plesiochronous digital hierarchy (PDH) appeared unsuitable for achieving network synchronization, leading to the development of the synchronous optical network (SONET) and synchronous digital hierarchy (SDH) as the two equivalent standards for circuit-switched optical networks. Several bandwidth-efficient techniques were also developed to carry packet-switched data traffic over SONET/SDH networks, offering some useful data-over-SONET/SDH architectures. Subsequently, with the increasing transmission rates for SONET/SDH and Ethernet-based LANs, a convergent networking platform called optical transport network (OTN), was developed. With the ever-increasing volume of bursty data traffic, a standard for packet-switched ring networks, called resilient packet ring (RPR), was also developed for better bandwidth realization in optical fibers. In this chapter, we first present the SONET/SDH networks and the techniques for supporting the data traffic therein, followed by a description of the basic concepts and salient features of the OTN and RPR networks. (147 words)

A high-speed micro-ring modulator for next generation energy-efficient optical networks beyond 100 Gbaud

2021 ◽  
Author(s):  
Meer Sakib ◽  
Peicheng Liao ◽  
Chaoxuan Ma ◽  
Ranjeet Kumar ◽  
Duanni Huang ◽  
...  
Keyword(s):  
Optical Networks ◽  
Energy Efficient ◽  
High Speed ◽  
Next Generation ◽  
Ring Modulator

scholarly journals Provision of adaptive guard band in elastic optical networks

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Neclyeux S. Monteiro ◽  
Alexandre C. Fontinele ◽  
Divanilson R. Campelo ◽  
André Soares
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Blocking Probability ◽  
Optical Signal ◽  
The Other ◽  
Data Traffic ◽  
Guard Band ◽  
Usage Level ◽  
Selection Of

Abstract Elastic optical networks are a network infrastructure capable of withstanding the high demand for data traffic from high-speed networks. One of the problems that must be solved to ensure the smooth functioning of the network is called Routing, Modulation Level and Spectrum Assignment (RMLSA). This work aims to propose a new approach to this problem with an algorithm to select the guard band in an adaptive way. Two algorithms for the adaptive selection of the guard band, called Guard Band according to Use of the Network (GBUN) and Guard Band by OSNR Margin (GBOM), are presented. The GBUN algorithm performs the guard band selection based on the usage level of network. On the other hand the GBOM algorithm uses an Optical Signal to Noise Ratio (OSNR) margin for the selection of the guard band. The performances of the proposed algorithms are compared with algorithms that use fixed guard band values and the adaptive proposal AGBA. The results showed that the GBOM algorithm presented a better performance in terms of bandwidth blocking probability for the studied scenarios. In general, GBOM also presents a better energy efficiency when compared to the other algorithms.

scholarly journals Provision of Adaptive Guard Band in Elastic Optical Networks

2020 ◽  
Author(s):  
Neclyeux Sousa Monteiro ◽  
Alexandre Cardoso Fontinele ◽  
Divanilson Rodrigo de Sousa Campelo ◽  
André Castelo Branco Soares
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Blocking Probability ◽  
Optical Signal ◽  
Data Traffic ◽  
Adaptive Selection ◽  
Guard Band ◽  
Usage Level ◽  
Selection Of

Abstract Elastic optical networks are a network infrastructure capable of withstanding the high demand for data traffic from high-speed networks. One of the problems that must be solved to ensure the smooth functioning of the network is called Routing, Modulation Level and Spectrum Assignment (RMLSA). This work aims to propose a new approach to this problem with an algorithm to select the guard band in a adaptive way. Two algorithms for the adaptive selection of the guard band, called Guard Band according to Use of the Network (GBUN) and Guard Band by OSNR Margin (GBOM), are presented. The GBUN algorithm performs the guard band selection based on the usage level of network. On the other hand the GBOM algorithm uses an Optical Signal to Noise Ratio (OSNR) margin for the selection of the guard band. The performances of the proposed algorithms are compared with algorithms that use fixed guard band values and the adaptive proposal AGBA. The results showed that the GBOM algorithm presented a better performance in terms of bandwidth blocking probability for the studied scenarios.

Enhanced redirection strategy for peer to peer services in high-speed and large-capacity ethernet passive optical networks

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jinxia Yu ◽  
Shangya Han ◽  
Qing Ye ◽  
Panke Qin ◽  
Yongli Tang ◽  
...  
Keyword(s):  
Optical Networks ◽  
Network Traffic ◽  
High Speed ◽  
Service Providers ◽  
Access Network ◽  
Peer To Peer ◽  
Data Traffic ◽  
Core Network ◽  
Large Capacity ◽  
Internet Service

AbstractAn important problem of network traffic is how to efficiently carry massive amounts of data traffic generated by Peer-to-Peer (P2P) services in high-speed and large-capacity optical access networks. P2P file-sharing traffic is regarded as one of the biggest bandwidth consumption in the world. Internet service providers can reduce the bandwidth burden in the feeder fiber by localizing the network traffic. In this paper, we propose an enhanced redirection strategy based on the optimized MPCP protocol (ERS-MPCP) to redirect the traffic into the access network and reduce the latency. A Markov chain is used for mathematical modeling. In the proposed strategy, we build a simulation platform for network simulation. Simulation results show that our strategy can improve the overall redirection success rate by up to 9%, thereby reducing the data traffic burden on the core network.

scholarly journals Demonstration of Multimode Optical Fiber Communication System using 1300 nm Directly Modulated VCSEL for Gigabit Ethernet

2018 ◽  
pp. 26-32
Author(s):  
Tomáš Huszaník ◽  
Ján Turán ◽  
Ľuboš Ovseník
Keyword(s):  
Optical Fiber ◽  
Optical Networks ◽  
Communication Systems ◽  
High Speed ◽  
Driving Forces ◽  
Optical Fiber Communication ◽  
Cavity Surface ◽  
Fiber Communication ◽  
Gigabit Ethernet ◽  
Multimode Optical Fiber

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).

scholarly journals Energy Efficient Algorithm for High Speed Packet Data Transfer on Smartphone Environment

2019 ◽  
Vol 8 (6) ◽  
pp. 2644-2658
Keyword(s):  
Efficient Algorithm ◽  
Energy Efficient ◽  
High Speed ◽  
Data Transfer ◽  
Data Communication ◽  
Battery Life ◽  
Main Concern ◽  
Battery Power ◽  
Packet Data ◽  
Total Network

Energy efficiency is the main concern of the 21st century. The smartphone could be a trendy battery operated device and also the experience of the smartphone usage is entirely counting on the battery life. The state of the Smartphone can be Screen_OFF and Screen_ON. Majority of the time spent by the user on the phone is in screen off mode however 30% to 40% of the battery power consumption in this state through Always_On Apps. These apps send tiny burst to their server for various functions at a specific interval of time and keep RRC state busy. This paper proposes an energy-efficient algorithm for high-speed packet data transfer on a Smartphone called PSEO (PS Energy Optimization). It schedules data communication throughout the screen off state based on the radio signal quality. PSEO regulate Data_ON and Data_OFF period while not affecting the user convenience based on the independent value of RSRQ. The proposed research saves the energy up to 28.88%, 78.60% and 16.20% on average of total network energy, Screen_Off energy, and overall smartphone energy respectively

scholarly journals On Ultra-Reliable Low Latency Multipath TCP For Connected Autonomous Vehicles

2021 ◽  
Author(s):  
Shiva Raj Pokhrel ◽  
Neeraj Kumar ◽  
Anwar Walid
Keyword(s):  
Autonomous Vehicles ◽  
High Speed ◽  
Data Communication ◽  
Low Latency ◽  
Data Traffic ◽  
Mathematical Study ◽  
Multipath Tcp ◽  
Multiple Network ◽  
Very High ◽  
Delay Variation

Connected Autonomous Vehicles (CAVs) are Not-So-Futuristic. CAVs will be highly dynamic by intelligently exploiting multipath communication over several radio technologies, such as high-speed WiFi and 5G and beyond networks. Yet, the likelihood of data communication loss can be very high and/, or packets arrive at the destination not in correct working order due to erratic and mixed time-varying wireless links. Furthermore, the vehicular data traffic is susceptible to loss and delay variation,which recommends the need to investigate new multipath TCP(MPTCP) protocols for ultra-reliable low latency communication(URLLC) over such heterogeneous networks while reassuring CAVs’ needs. We undertake the challenge by jointly considering network coding and balanced linked adaptation for performing coupled congestion control across multiple wireless paths.Consequently, the proposed low delay MPTCP framework for connecting autonomous vehicles is efficient and intelligent by design. We conduct a rigorous convergence analysis of the MPTCP design framework. In summation, we provide a detailed mathematical study and demonstrate that the latency penalty for the URLLC-MPTCP developed over these networks becomes negligible when considering the possible benefits that multiple network convergence could offer. Our extensive emulation results demonstrate all these lucrative features of URLLC-MPTCP.

Analysis of Inter-Satellite Optical Wireless Communication System

2017 ◽  
Vol 7 (10) ◽  
pp. 10
Author(s):  
Rajbir Singh
Keyword(s):  
Wireless Communication ◽  
Optical Networks ◽  
Data Transmission ◽  
High Speed ◽  
Open Space ◽  
Communication Link ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Speed Data ◽  
Speed Data Transmission

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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