1,753 results on '"Carrier Ethernet"'
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2. Agent Model for Managing a Transport Communication Network as a Part of Multi-agent Management System
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Kanaev, Andrey, Login, Elina, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Manakov, Aleksey, editor, and Edigarian, Arkadii, editor
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- 2022
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3. Examining the Access Network Technology and Protocols
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Gilchrist, Alasdair and Gilchrist, Alasdair
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- 2016
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4. Resource Allocation in a Multiple-Priority Buffered Link
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Żuraniewski, Piotr, Mandjes, Michel, van den Berg, Hans, Malhotra, Richa, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Dudin, Alexander, editor, and De Turck, Koen, editor
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- 2013
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5. Ethernet Services Transport Protocol with Configurable-QoS Attributes for Carrier Ethernet
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Estevez, Claudio, Ellinas, Georgios, Chang, Gee-Kung, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert, Series editor, Coulson, Geoffrey, Series editor, Tomkos, Ioannis, editor, Bouras, Christos J., editor, Ellinas, Georgios, editor, Demestichas, Panagiotis, editor, and Sinha, Prasun, editor
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- 2012
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6. Flow Monitoring Experiences at the Ethernet-Layer
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Hofstede, Rick, Drago, Idilio, Sperotto, Anna, Pras, Aiko, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Lehnert, Ralf, editor
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- 2011
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7. Carrier Ethernet OAM: An Overview and Comparison to IP OAM
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Hofstede, Rick, Drago, Idilio, Moura, Giovane C. M., Pras, Aiko, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Chrisment, Isabelle, editor, Couch, Alva, editor, Badonnel, Rémi, editor, and Waldburger, Martin, editor
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- 2011
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8. ЗАСТОСУВАННЯ В МУЛЬТИАГЕНТНІЙ СИСТЕМІ УПРАВЛІННЯ МОДЕЛІ ФУНКЦІОНУВАННЯ ФРАГМЕНТУ ТЕЛЕКОМУНІКАЦІЙНОЇ МЕРЕЖІ CИСТЕМИ ЗВ’ЯЗКУ ЗБРОЙНИХ СИЛ УКРАЇНИ
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Volodymyr Rudenko, Viktor Chenchenko, Natalia Gryshina, and Mykhailo Zinchenko
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Control theory ,Computer science ,Reliability (computer networking) ,Distributed computing ,Node (networking) ,Control system ,Process (computing) ,Fault tolerance ,Telecommunications network ,Carrier Ethernet - Abstract
Today, there are many standards that describe the architecture and mechanisms for monitoring and controlling elements of the Carrier Ethernet network, but there is no single methodology and requirements for the control system of such a communication network are not formed. This article proposes a solution to this problem by modeling the process of functioning of a telecommunication network based on this technology to manage its configuration. To create this model, the AnyLogic simulator was selected. The aim of the work is to identify the relationship between the reliability indicators of a telecommunication network based on Carrier Ethernet technology and the process of functioning of the telecommunication network management and recovery subsystems. As well as obtaining the dependence of the availability factor on the duration of the time between failures, the time of failure and on the quantitative characteristics of the configuration of the simulated network fragment. The multi-agent system, which is part of the control system, is in interaction with it. The use of a distributed telecommunications network control facility based on Carrier Ethernet technology at MASU will provide a demonstration of the dynamics of changes in the state of a fragment of a telecommunications network and obtain an estimate of network reliability. The solution to the problem of building the MASU model is based on the use of agent-based modeling, which belongs to the class of agent-based models. The paper uses the provisions of probability theory, control theory and system theory. The novelty of the presented model lies in the selection of a new Carrier Ethernet control object, the selection of an original set of control and management mechanisms for their inclusion in the model, and the use of the mathematical apparatus of agent modeling. Using the presented model to study the functioning of a telecommunication network allows you to track the behavior of each node and each route with its own failure and recovery rates for a network structure of any complexity, and allows you to solve problems associated with determining the length of time to lose connectivity in the route and the duration of the time between failures all routes simultaneously, allows you to form an assessment of network reliability and fault tolerance.
- Published
- 2020
9. Enabling Optical Network Test Bed for 5G Tests.
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Giuntini, Marco, Grazioso, Paolo, Matera, Francesco, Valenti, Alessandro, Attanasio, Vincenzo, Di Bartolo, Silvia, and Nastri, Emanuele
- Subjects
- *
WIRELESS Internet , *LONG-Term Evolution (Telecommunications) - Abstract
In this work, we show some experimental approaches concerning optical network design dedicated to 5G infrastructures. In particular, we show some implementations of network slicing based on Carrier Ethernet forwarding, which will be very suitable in the context of 5G heterogeneous networks, especially looking at services forverticalenterprises. We also show how to adopt a central unit (orchestrator) to automatically manage such logical paths according to quality-of-service requirements, which can be monitored at the user location. We also illustrate how novel all-optical processes, such as the ones based on all-optical wavelength conversion, can be used for multicasting, enabling development of TV broadcasting based on 4G–5G terminals. These managing and forwarding techniques, operating on optical links, are tested in a wireless environment on Wi-Fi cells and emulating LTE and WiMAX systems by means of the NS-3 code. [ABSTRACT FROM PUBLISHER]
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- 2017
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10. On control plane algorithms for Carrier Ethernet networks: Unicast, multicast provisioning and control traffic reduction.
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Mehta, Saurabh, Joshi, Sandeep, Das, Tamal, and Gumaste, Ashwin
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ETHERNET ,MULTICASTING (Computer networks) ,SONET (Data transmission) ,SYNCHRONOUS digital hierarchy (Data transmission) ,SERVICE-oriented architecture (Computer science) - Abstract
Carrier Ethernet systems are actively replacing SONET/SDH networks for transport of provider data. After much standardization in both the IEEE and the IETF, Carrier Ethernet has evolved as a rich carrier-class technology. The standards do not focus on specific implementation aspects of providing guaranteed service-oriented features that are intrinsic towards successful replacement of SONET/SDH by Carrier Ethernet solutions. In this paper, we consider the engineering aspects of the Carrier Ethernet software defined control plane for provisioning, managing and maintaining services. Specifically, we propose methods for provisioning guaranteed unicast services considering the underlying network state. The problem is difficult due to the complex nature of admission control coalesced with subjective user requirement that is not easy to rationalize across a network. We also investigate the problem of sub-50 ms protection of multicast connections and propose a unique, tractable algorithm within the control plane for enabling carrier-class multicast services. Finally, we focus on overall control traffic reduction schemes. An intuitive merging algorithm is proposed that minimizes control traffic in Carrier Ethernet domains. A simulations study extensively evaluates the proposed techniques. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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11. Управление транспортной сетью Carrier Ethernet
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синхронизация ТрС ,Carrier Ethernet ,механизмы контроля ТрС ,SyncE standard ,стандарт SyncE ,цифровая ФАПЧ в CE ,пакетные технологии ПД ,Synchronization of the transport network ,Packet Data transmission technologies Transport network control mechanisms - Abstract
Необходимость поддержания высоких стандартов качества обслуживания широкого спектра предоставляемых услуг формирует запрос на обеспечение частотной и временной синхронизации. Начавшийся переход от технологии синхронной цифровой иерархии (SDH) к пакетным транспортным сетям приводит решение такой задачи к исследованию возможных технических реализаций в области разработки синхронизации транспортной сети связи с пакетной передачей данных в части конфигурации и управления состоянием ее элементов., The need to maintain high standards of service quality for a wide range of provided services forms a request for frequency and time synchronization. The transition from synchronous digital hierarchy (SDH) technology to packet transport networks has already begun, which leads to the solution of such a problem to the search for possible technical implementations to meet the requirements for the development of a synchronization system for a transport communication network with packet data transmission in terms of configuration and control of the state of its elements., Автоматика, связь, информатика, Выпуск 10 (10) 2022, Page 20–23
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- 2022
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12. On the Unprecedented Scalability of the FISSION (Flexible Interconnection of Scalable Systems Integrated Using Optical Networks) Datacenter.
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Gumaste, Ashwin, Kushwaha, Aniruddha, Das, Tamal, Bheri, Bala Murali Krishna, and Wang, Jianping
- Abstract
Internet traffic is doubling almost every other year which implies that datacenter (DC) scalability will play a critical role in enabling future communications. In this paper, we propose FISSION (Flexible Interconnection of Scalable Systems Integrated using Optical Networks)—a scalable, fault-tolerant DC architecture based on a switchless optical-bus backplane and carrier-class switches, and its supporting protocol. The FISSION DC enables unprecedented scalability using affordable optics and standardized electrical switches. It is architecturally bifurcated into sectors that internally have a nonblocking carrier-class switching interconnection structure. Sectors are connected in the switchless backplane using optical buses. Each sector can receive traffic on all wavelengths (achieved through optical-bus property without any switch reconfiguration) and across all fibers, but a sector transmits on only a group of wavelengths and only in one of the fiber rings in the backplane. The switches function based on an SDN methodology that facilitate mapping of complex protocols and addresses to DC-specific addressing that is scalable and easier to use. We present an analysis to optimize the FISSION architecture. A simulation model is proposed that (1) compares the FISSION approach to other contemporary designs; (2) provides scalability analysis and protocol performance measurement; and, (3) provides optical layer modeling to validate working of the FISSION framework at high line-rates. Our architecture, which provides 100% bisection bandwidth, is validated by simulation results exhibiting negligible packet loss and low end-to-end latency. [ABSTRACT FROM PUBLISHER]
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- 2016
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13. 레이어 2 보안을 위한 MACsec 어댑터 구현.
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정낙주, 박병돈, 박한수, 서종균, 한기천, and 정회경
- Abstract
MACsec is a cryptographic function that operates on Layer 2, the international standard defined in the IEEE 802.1AE. As industries such as IoT(Internet of Things) devices are receiving attention recently are connected to the network and Internet traffic is increasing rapidly, and is exposed to the risk of a variety of Internet attacks. Traditional network security technologies were often made in Layer 3, such as IPsec. However, to be increased as rapidly as the current traffic situation is complicated, and became interested in the security function of protecting the entire traffic instead of for a specific application or protocol. It appeared as these technologies is technology MACsec technology to protect all traffic in Layer 2. In this paper, we propose a Layer 2 security technology adapter MACsec MACsec a technology that allows you to simply and easily add them to the existing Layer 2 networks. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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14. Protocols for Automotive Ethernet
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Thomas Königseder and Kirsten Matheus
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PROFINET ,Ethernet Powerlink ,Media Redundancy Protocol ,Computer science ,business.industry ,Ethernet over PDH ,Industrial Ethernet ,business ,ATA over Ethernet ,Connection-oriented Ethernet ,Computer network ,Carrier Ethernet - Published
- 2021
15. Multi-layer high-speed network design in mobile backhaul using robust optimization.
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Mathew, Ashish, Das, Tamal, Gokhale, Prasad, and Gumaste, Ashwin
- Abstract
The multi-layer network design problem and the mobile backhaul problem are both interesting from the perspective of choosing the correct technology and protocol as well as choosing the appropriate node architecture to meet a wide variety of overlay traffic demands. Network operators encounter two variants of the multi-layer/ backhaul problem: 1) For a given set of uncertain traffic demands, which set of technologies would minimize the network cost? 2) Would these technology choices be invariant to the changing traffic demands? This problem of technology choice can essentially be abstracted to a switching and grooming problem with the added complexity of unknown traffic demands, which at best may be approximated to some known statistical parameters. To solve this complex switching and grooming problem, our goal is to make use of the theory of robust optimization with the assumption of known boundary conditions on traffic. We present a comprehensive optimization model that considers technology choices in terms of protocols, physical layer parameters, link boundary conditions, and transmission layer constraints. Validated by simulations, our model shows the stand-off conditions between various technologies and how a network operator must take proactive steps to be able to meet requirements of the next-generation networks and services. Our main result showcases network design using two technology alternatives [1) Multi-Protocol Label Switching (MPLS) + Optical Transport Network (OTN) + Reconfigurable Optical Add-Drop Multiplexer (ROADM) and 2) Carrier Ethernet (CE) + OTN + ROADM] and the effect of robustness on these choices. A heuristic is used for comparative purposes as well as to exhaustively model the dynamic case of brown-field networks. [ABSTRACT FROM PUBLISHER]
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- 2015
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16. Practical Consistency of Ethernet-Based QoS with Performance Prediction of Heterogeneous Microwave Radio Relay Transport Network
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Adriana Lipovac, Mirza Hamza, Vlatko Lipovac, and Slađan Zlatar
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Ethernet ,Mobile radio ,Computer Networks and Communications ,Computer science ,radio relay networks ,carrier Ethernet ,performance ,QoS ,cross-layer testing ,lcsh:TK7800-8360 ,02 engineering and technology ,020210 optoelectronics & photonics ,Next-generation network ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,Carrier Ethernet ,Access network ,business.industry ,Quality of service ,lcsh:Electronics ,020206 networking & telecommunications ,Plesiochronous digital hierarchy ,Hardware and Architecture ,Control and Systems Engineering ,Signal Processing ,Radio relay ,business ,Computer network - Abstract
Microwave line-of-sight radio relay (RR) systems are a constitutive part of a telecom operator transport network, as an alternative to optical transmission systems when the latter are not technically possible or rational to implement. Nowadays, RR links are quite often used in the access network for connecting mobile radio base stations, thus also enabling traffic aggregation, and so on. In this paper, we focus on a practical, real-life, five-section heterogeneous RR network, comprising classic synchronous digital hierarchy (SDH) and SDH new generation network (NGN) architecture, hybrid parallel and mutually independent transmission of native Ethernet and TDM services, and all-IP network parts. Specifically, the main task of this work is to answer whether such a diverse RR system could satisfy the quality norms for Ethernet-based services, meaning whether a tolerable RR unavailability will necessarily imply the according Ethernet quality of service (QoS) degradation. This question is addressed by the comprehensive in-service and out-of-service testing of an operational hybrid RR transmission system. After extensive practical testing and appropriate analysis of the achieved results, it came out that the impact of RR-level impairments that determine the performance prediction affected the Ethernet QoS to the extent that BER values increased to the acceptability threshold values. We believe that the preliminary results reported here could serve as a hint and a framework for a more comprehensive cross-layer test strategy in terms of both test diversity and repeating rate, which contemporary network operators need to implement in order to enable the appropriate quality of experience for users of their services.
- Published
- 2021
17. Verification of Consistency Between Ethernet Based QoS with Performance Prediction of Heterogeneous Microwave Radio-Relay Backhaul Network
- Author
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Adriana Lipovac, Slađan Zlatar, Vladimir Lipovac, Mirza Hamza, and Aboltins, Arturs
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Ethernet ,business.industry ,Consistency (statistics) ,Relay ,law ,Computer science ,Quality of service ,radio relay networks ,carrier Ethernet ,performance ,QoS ,cross-layer testing ,Performance prediction ,Microwave transmission ,business ,Computer network ,law.invention - Abstract
Microwave line-of-sight radio relay (RR) systems are a constitutive part of a telecom operator transport network, as an alternative to optical transmission systems when the latter are not technically possible or rational to implement. Nowadays, RR links are quite often used in the access network for connecting mobile radio base stations, thus also enabling traffic aggregation, and so on. In this paper, we focus on a practical, real-life, five-section heterogeneous RR network, comprising classic synchronous digital hierarchy (SDH) and SDH new generation network (NGN) architecture, hybrid parallel and mutually independent transmission of native Ethernet and TDM services, and all-IP network parts. Specifically, the main task of this work is to answer whether such a diverse RR system could satisfy the quality norms for Ethernet-based services, meaning whether a tolerable RR unavailability will necessarily imply the according Ethernet quality of service (QoS) degradation. This question is addressed by the comprehensive in-service and out-of-service testing of an operational hybrid RR transmission system. After extensive practical testing and appropriate analysis of the achieved results, it came out that the impact of RR-level impairments that determine the performance prediction affected the Ethernet QoS to the extent that BER values increased to the acceptability threshold values. We believe that the preliminary results reported here could serve as a hint and a framework for a more comprehensive cross-layer test strategy in terms of both test diversity and repeating rate, which contemporary network operators need to implement in order to enable the appropriate quality of experience for users of their services.
- Published
- 2021
18. APPLICATION OF THE MULTI-AGENT CONTROL SYSTEM OF THE MODEL OF FUNCTIONING OF THE TELECOMMUNICATION NETWORK FRAGMENT BY COMMUNICATION SYSTEMS OF THE ARMED FORCES OF UKRAINE
- Author
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Rudenko, Volodymyr, Zinchenko, Mykhailo, Gryshina, Natalia, and Chenchenko, Viktor
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телекомунікаційна мережа зв’язку ,Carrier Ethernet ,агентне моделювання ,AnyLogic ,механізми ОАМ ,система управління ,мережева надійність ,телекоммуникационная сеть связи ,Агентное моделирование ,система управления ,сетевая надежность ,telecommunication communication network ,Agent based modeling ,control system ,network reliability - Abstract
На сьогоднішній день існує безліч стандартів, де описані архітектура і механізми контролю та управління елементами мережі Сarrier Ethernet, але не існує єдиної методики та не сформовані вимоги до системи управління такою мережею зв’язку. В даній статті запропоновано вирішення цього завдання шляхом моделювання процесу функціонування телекомунікаційної мережі на основі технології Сarrier Ethernet для управління її конфігурацією. Для створення даної моделі обраний апарат імітаційного моделювання AnyLogic. Метою роботи є виявлення залежності між показниками надійності функціонування телекомунікаційної мережі на основі технології Сarrier Ethernet і процесом функціонування підсистем управління і відновлення телекомунікаційної мережі. А також отримання залежності коефіцієнту готовності від тривалості часу напрацювання на відмову, часу відновлення відмови та від кількісних характеристик конфігурації модельованого фрагмента мережі. Мультиагентна система, яка є частиною керуючої системи, знаходиться у взаємодії з нею. Використання в мультиагентній системи управління розподіленого об’єкту управління телекомунікаційної мережі на основі технології Сarrier Ethernet дозволить отримати демонстрацію динаміки зміни стану фрагмента телекомунікаційної мережі та отримати оцінку мережевої надійності. Рішення завдання з побудови моделі мультиагентної системи управління грунтується на використанні методу агентного моделювання, який відноситься до класу агент-орієнтованих моделей. В роботі використовуються положення теорії ймовірностей, теорії управління і теорії систем. Новизна представленої моделі полягає у виборі нового об’єкта управління Сarrier Ethernet, виборі оригінального комплексу механізмів контролю і управління для їх включення в модель, застосуванні математичного апарату агентного моделювання. Використання представленої моделі для дослідження функціонування телекомунікаційної мережі дозволяє простежувати динаміку поведінки кожного вузла і кожного маршруту зі своїми значеннями інтенсивності відмов і відновлення для структури мережі будь-якої складності, дозволяє вирішувати завдання, пов’язані з визначенням тривалості часу до втрати зв’язності в маршруті і тривалості часу напрацювання на відмову всіх маршрутів одночасно, дозволяє формувати оцінку мережевої надійності та відмовостійкості., На сегодняшний день существует множество стандартов, где описаны архитектура и механизмы контроля и управления элементами сети Carrier Ethernet, но не существует единой методики и не сформированы требования к системе управления такой сетью связи. В данной статье предложено решение этой задачи путем моделирования процесса функционирования телекоммуникационной сети на основе данной технологии для управления ее конфигурацией. Для создания данной модели выбран аппарат имитационного моделирования AnyLogic. Целью работы является выявление зависимости между показателями надежности функционирования телекоммуникационной сети на основе технологии Carrier Ethernet и процессом функционирования подсистем управления и восстановления телекоммуникационной сети. А также получение зависимости коэффициента готовности от продолжительности времени наработки на отказ, времени отказа и от количественных характеристик конфигурации моделируемого фрагмента сети. Мультиагентная система, которая является частью управляющей системы, находится во взаимодействии с ней. Использование в мультиагентной системе управления распределенного объекта управления телекоммуникационной сети на основе технологии Carrier Ethernet позволит получить демонстрацию динамики изменения состояния фрагмента телекоммуникационной сети и получить оценку сетевой надежности. Решение задачи по построению модели мультиагентной системы управления основывается на использовании метода агентного моделирования, который относится к классу агент-ориентированных моделей. В работе используются положения теории вероятностей, теории управления и теории систем. Новизна представленной модели заключается в выборе нового объекта управления Carrier Ethernet, выборе оригинального комплекса механизмов контроля и управления для их включения в модель, применении математического аппарата агентного моделирования. Использование представленной модели для исследования функционирования телекоммуникационной сети позволяет прослеживать динамику поведения каждого узла и каждого маршрута со своими значениями интенсивности отказов и восстановления для структуры сети любой сложности, позволяет решать задачи, связанные с определением продолжительности времени к потере связности в маршруте и продолжительности времени наработки на отказ всех маршрутов одновременно, позволяет формировать оценку сетевой надежности и отказоустойчивости., Today, there are many standards that describe the architecture and mechanisms for monitoring and controlling elements of the Carrier Ethernet network, but there is no single methodology and requirements for the control system of such a communication network are not formed. This article proposes a solution to this problem by modeling the process of functioning of a telecommunication network based on this technology to manage its configuration. To create this model, the AnyLogic simulator was selected. The aim of the work is to identify the relationship between the reliability indicators of a telecommunication network based on Carrier Ethernet technology and the process of functioning of the telecommunication network management and recovery subsystems. As well as obtaining the dependence of the availability factor on the duration of the time between failures, the time of failure and on the quantitative characteristics of the configuration of the simulated network fragment. The multi-agent system, which is part of the control system, is in interaction with it. The use of a distributed telecommunications network control facility based on Carrier Ethernet technology at MASU will provide a demonstration of the dynamics of changes in the state of a fragment of a telecommunications network and obtain an estimate of network reliability. The solution to the problem of building the MASU model is based on the use of agent-based modeling, which belongs to the class of agent-based models. The paper uses the provisions of probability theory, control theory and system theory. The novelty of the presented model lies in the selection of a new Carrier Ethernet control object, the selection of an original set of control and management mechanisms for their inclusion in the model, and the use of the mathematical apparatus of agent modeling. Using the presented model to study the functioning of a telecommunication network allows you to track the behavior of each node and each route with its own failure and recovery rates for a network structure of any complexity, and allows you to solve problems associated with determining the length of time to lose connectivity in the route and the duration of the time between failures all routes simultaneously, allows you to form an assessment of network reliability and fault tolerance.
- Published
- 2020
19. Capacity planning for Carrier Ethernet LTE backhaul networks.
- Author
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Checko, Aleksandra, Ellegaard, Lars, and Berger, Michael
- Abstract
With the introduction of LTE networks operators need to plan a new, IP-based mobile backhaul. In this paper, we provide recommendation on dimensioning LTE backhaul networks links using three methods: delay-, dimensioning formula- and overbooking factor-based. Results are obtained from OPNET simulations with traffic model based on traffic forecast for 2015. A delay-based approach gives recommended bandwidth for expected number of users. A dimensioning formula is proposed to calculate link bandwidth when mean value of aggregated traffic in the network is known. An overbooking factor is calculated and verified. Simulation in this work proves that Carrier Ethernet, one of the candidate technologies for mobile backhaul, protects the network from users that want to flood the network with their data and manages to keep the delay experienced by other users low. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF
20. Effective load balancing in Ethernet rings.
- Author
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Lee, Kwang-koog, Ryoo, Jeong-dong, Kim, Sun Me, and Lee, Jong Hyun
- Abstract
This paper models a ring loading problem suited for survivable Ethernet rings blocking a link to create a loop-free topology. When a block is given on a link of an Ethernet ring, loading of traffic demands is immediately determined due to the logically formed bus topology. As the traffic load over a ring varies depending on the position of the block, the ring loading problem can be viewed a new optimization problem named the ring block positioning (RBP) problem. Our RBP is grouped into two types: RBPG to minimize the overall ring load and RBPL to minimize the maximum link load. For each RBP, we present an exhaustive search method to check all block cases on a ring and then suggest a more effective ring loading algorithm ensuring the computing time shorter than the exhaustive search. According to our experiments using MATLAB, each effective ring loading method shows computing time about 360 times in RBPG and about four times in RBPL faster than each exhaustive search while finding the optimal block to satisfy the goal of each RBP. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF
21. A Carrier-Ethernet oriented transport protocol with a novel congestion control and QoS integration: Analytical, simulated and experimental validation.
- Author
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Estevez, Claudio, Angulo, Sergio, Abujatum, Andres, Ellinas, Georgios, Liu, Cheng, and Chang, Gee-Kung
- Abstract
Carrier Ethernet is becoming the dominating backhaul network due to its flexibility, scalability, interoperability and low-cost. Carrier Ethernet networks (CENs) are inherently high bandwidth-delay product (BDP) networks, hence Traditional TCP, and similar variants, make undesirable choices of transport protocol mainly because of the aggressive multiplicative-decrease algorithm. The Ethernet-Services Transport Protocol (ESTP) has proven relieve the effects of the decrease algorithm by dynamically adjusting the transmission rate according to the level of congestion estimated in the network. It should be emphasized that most protocols detect congestion, but do not estimate the level of congestion. Also ESTP incorporates QoS information to further improve performance. In this work, a steady-state throughput analytical model of ESTP is derived, an experimental testbed is built and simulation results are obtained. All validation methods show good agreement. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF
22. On the Backbone VLAN Identifier (BVID) Allocation in 802.1Qay Provider Backbone Bridged — Traffic Engineered Networks.
- Author
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Bhamare, Deval, Gumaste, Ashwin, Krishnamoorthy, Mohan, and Dayama, Niraj Ramesh
- Abstract
Carrier Ethernet is rapidly being deployed in the metropolitan and core segments of the transport network. One of the emerging flavors of Carrier Ethernet is the IEEE 802.1Qay PBB-TE or Provider Backbone Bridging-Traffic Engineering standard. PBB-TE relies on the assignment of a network-specific Virtual Local Area Network (VLAN) tag, called the Backbone VLAN ID or BVID that is used in conjunction with a backbone Media Access Control (MAC) address for forwarding. The 12-bit BVID along with 48-bit Backbone MAC address are used to forward an Ethernet frame. The assignment of BVIDs in a network is critical, given that there are only 4094 possible assignments, especially for those paths that are overlapping in the network graph and incident at the same destination. While the only way to scale is to reuse BVIDs, this method can lead to a complication if the same BVID is allocated to an overlapping path. To the best of our knowledge, this is the first instance of isolating this problem of limited BVID availability which rises only due to graphical overlap between services. We formulate and solve this as a constrained optimization problem. We present optimal and heuristic algorithms to solve the BVID problem. The optimal approach solves the `static' case, while the heuristic can solve both the `static' and the `dynamic' cases of the BVID allocation problem. Results show that the developed heuristics perform close to the optimal and can be used in commercial settings for both the static and dynamic cases. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
- Full Text
- View/download PDF
23. Cloud Computing in Carrier Grade Networks.
- Author
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DRĂGAN, Ioan and ZOTA, Răzvan
- Subjects
CLOUD computing ,ETHERNET ,CUSTOMER services ,NETWORK routers ,COMPUTER networks - Abstract
This paper is presenting a method of applying Infrastructure as a Code concept in the case of the carrier grade networks in order to orchestrate and automate the deployment of Network as a Service. Even though shared network services have been on the market for a while, a complete automated deployment of virtualized network services and equipment has not been developed yet, so, in our opinion, the new methods of delivering services would permit traditional Ethernet carriers to deliver new service packages to their customers. These new service packages would include connectivity services, Internet connection, virtual router capabilities, network storage and a diversity of cloud computing services. [ABSTRACT FROM AUTHOR]
- Published
- 2014
24. Graphic interface for setting up Carrier Ethernet technology
- Subjects
мережі ,Carrier Ethernet ,графічний інтерфейс ,mpls - Abstract
Створено графічний інтрефейс для налаштування L2 VPN мережі. Даний інтерфейс допоможе будувати складні мережі за MPLS технологією. Графічний інтерфейс створено у вигляді веб-сторінки. Робота з ним проста і зрозуміла та не потребує додаткових налаштувань. Буде корисна для використання при вивченні технології Carrier Ethernet школярами та студентами. Допоможе розібратися з налаштуваннями адміністраторам-почтаківцям.
- Published
- 2020
25. Optimal Traffic Re-Grooming rooming Model for Heterogeneous Carrier Ethernet Services over WDM Optical Network.
- Author
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Resendo, Leandro Colombi
- Subjects
OPTICAL communications ,WAVELENGTH division multiplexing ,MIXED integer linear programming ,PROBLEM solving ,ETHERNET ,MATHEMATICAL models ,ROUTING (Computer network management) - Abstract
This paper proposes three novel integer linear programming (ILP) formulations, where the first model deals with the Grooming, Routing, Wavelength Assignment, and Carrier Ethernet Interface Allocation Problem (GRWA-I); the second to Traffic Re-Grooming Problem (TRGP) to accommodate demand changes in a GRWA-I network scenarios; and the third to Traffic Re-Grooming demands in case of failures. The traffic re-grooming problem consists basically in assigning demands change in a working network, without affect others requests. In addition, in this work, it problem is formulated for the first time using ILP model. As TRGP needs a configured network scenario as input parameter, the first model proposed accomplish this task for the first network scenario. In numerical results, it was used a 14-node network (NSFnet) and 6 traffic matrix. Moreover, the models proposed were compared with a shortest path (SP) routing method. Results show the difference for network cost between an optimal method and a heuristic design over time, as well as the importance of an initial optimal configuration for future network growth. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
26. Model of the Attacker's Influence on a Fragment of Transport Communication Network Based on the Carrier Ethernet Technology
- Author
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А. Kanaev, E. Login, and A. Anufrenko
- Subjects
Computer science ,business.industry ,Fragment (computer graphics) ,business ,Telecommunications network ,Computer network ,Carrier Ethernet - Published
- 2018
27. Full-Fledged 10Base-T Ethernet Underwater Optical Wireless Communication System
- Author
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A. Sturniolo, David Scaradozzi, Ernesto Ciaramella, Giulio Cossu, and A. Messa
- Subjects
Ethernet ,visible light communication ,Wi-Fi array ,Computer Networks and Communications ,Computer science ,Real-time computing ,Wireless communication ,Optical power ,02 engineering and technology ,01 natural sciences ,010309 optics ,Optical transmitters ,020210 optoelectronics & photonics ,underwater communication ,Optical receivers ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Wireless ,14. Life underwater ,Electrical and Electronic Engineering ,Attenuation ,Light emitting diodes ,Light Emitting Diodes ,Modems ,Optical attenuators ,Optical sensors ,Carrier Ethernet ,business.industry ,Transmitter ,Ethernet flow control ,Avalanche photodiode ,Optical wireless communications ,Synchronous Ethernet ,10G-PON ,Transceiver ,business ,Ethernet protocol ,Computer hardware - Abstract
Marine researchers and operators during their daily work need consistent data from the underwater environment to constantly monitor the habitat’s probes and the robots condition. For underwater applications, wireless communication is of paramount importance. Today, the needs for high-speed communication has prompted the exploration of the Underwater Optical Wireless Communications (UOWCs) method. This paper presents the design and validation aspects of the optical layer of a bidirectional UOWC system developed in the framework of the European Project SUNRISE, able to provide wireless connectivity compliant to 10Base-T Ethernet protocol (Manchester-coded signal with 10 Mb/s data rate). The designed modems are made of two similar optical transceivers, each including a transmitter, a receiver unit, and an optical power monitor part. The transmitter is based on an array of blue Light Emitting Diodes; the receiver exploits a commercially available Avalanche Photodiode (APD) and the monitoring relies on a pin-photodiode. The modems, after a deep characterization in controlled environments, were proved to work with the required 10Base-T Ethernet, up to 7.5 m distance in shallow harbor waters. The complete optical system is intended to become a node of the SUNRISE infrastructure.
- Published
- 2018
28. Embedding Bandwidth-Guaranteed Network-Based Virtual Ethernet Switches in SDN Networks
- Author
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Wei-Kai Liu, How-Jen Fang, Kuang-Yi Li, Chen-Hua Chen, Steven S. W. Lee, and Ting-Shan Wong
- Subjects
business.product_category ,Edge device ,Computer science ,business.industry ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Ethernet flow control ,020206 networking & telecommunications ,02 engineering and technology ,Network topology ,Atomic and Molecular Physics, and Optics ,Metro Ethernet ,020210 optoelectronics & photonics ,Synchronous Ethernet ,Multipath routing ,0202 electrical engineering, electronic engineering, information engineering ,Network switch ,business ,Computer network ,Carrier Ethernet - Abstract
In this paper, we present a design for implementing network-based virtual Ethernet switches (NVESs) on top of a physical substrate consisting of a software-defined networking (SDN) network. An NVES has the same capability as a real Ethernet switch. A user makes a request to provision an NVES by specifying the number of ports and the maximum bandwidth for each port. The substrate network considered in this study is an Open Flow network. The entire network is controlled by an Open Flow controller. The controller is responsible for performing admission control, resource allocation, routing, address learning, and spanning tree protocol. To enhance the resource utilization of the substrate network, multipath routing is applied. Although using multipath routing can significantly improve bandwidth utilization, this approach results in out-of-order packet delivery and introduces additional error-control problems. To resolve these problems, we design a multipath agent to enhance the edge switch capability. The multipath agent is responsible for bandwidth metering, flow splitting, sequence number management, and packet reordering. We evaluated our virtual switches on top of a testbed network that includes not only commercial Open Flow switches but also a GPON-based virtual Open Flow switch. Multiple NVESs share the testbed network. The experimental results show that the user experience when using an NVES is identical to using a real Ethernet switch. In addition to the provision of guaranteed bandwidth for each NVES, traffic isolation among the NVESs is achieved. All NVESs are free of interference from others in the same network.
- Published
- 2017
29. A Max-Flow Design Approach for Improved Service Availability in Multi-Ring ERP Networks.
- Author
-
Nurujjaman, Mohammad, Sebbah, Samir, and Assi, Chadi
- Subjects
- *
ETHERNET , *COST effectiveness , *TECHNOLOGY , *NUMERICAL analysis , *COMPUTER networks - Abstract
Ethernet Ring Protection (ERP) has recently emerged to provide protection switching for Ethernet ring topologies with sub-50 ms failover capabilities. In addition to Ethernet's cost-effectiveness and simplicity, ERP's promise to also provide protection in mesh packet transport networks positions Ethernet as a prominent competitor to conventional SONET/SDH and the technology of choice for carrier networks. Higher service availability, however, in ERP mesh networks has been challenged by the issue of network partitioning and the contention for protection resources which may be caused by concurrent failures. In this paper, we show that in a mesh network designed to withstand only single failure situations, network services usually suffer from two outage categories subject to concurrent dual-link failures. We address the problem of minimal capacity network design to provide high service availability against concurrent dual-link failures. We cast this combinatorially complex design problem as an optimization one and show that higher service availability can be achieved by proper RPL (Ring Protection Link) placement and ring hierarchy selection. The objective is to maximize the network flow under any dual-link failure scenario. Our design achieves minimal capacity allocation that minimizes the number of service outages (up to 37%) therefore achieving higher service availability. Numerical evaluation and comparative study show that the joint desgin approach of the ILP model provisions 8% less capacity than the sequential two-step approach to achieve similar service availability. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
30. Faultless Protection Methods in Self-Healing Ethernet Ring Networks.
- Author
-
Kwang-koog Lee, Jeong-dong Ryoo, and Bheom Soon Joo
- Subjects
FAULT location (Engineering) ,ETHERNET ,COMPUTER networks ,MARKOV processes ,MESSAGE passing (Computer science) ,INFORMATION filtering systems ,DATABASES - Abstract
Self-healing Ethernet rings show promise for realizing the SONET/SDH-grade resilience in Carrier Ethernet infrastructures. However, when a ring is faulty, high-priority protection messages are processed in less time than low-priority data frames are processed. In this situation, any delayed data frames either being queued or traveling through long ring spans will cause the ring nodes to generate incorrect forwarding information. As a result, the data frames spread in the wrong direction, causing the ring to become unstable. To solve this problem, we propose four schemes, that is, dual flush, flush delay timer setting, purge triggering, and priority setting, and evaluate their protection performance under various traffic conditions on a ring based on the Ethernet ring protection (ERP) method. In addition, we develop an absorbing Markov chain model of the ERP protocol to observe how traffic congestion can impact the protection performance of the proposed priority setting scheme. Based on our observations, we propose a more reliable priority setting scheme, which guarantees faultless protection, even in a congested ring. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
31. Optimal capacity provisioning for survivable next generation Ethernet transport networks.
- Author
-
Nurujjaman, Mohammad, Sebbah, Samir, Assi, Chadi, and Maier, Martin
- Abstract
Ethernet ring protection (ERP) has recently emerged to provide protection switching for Ethernet ring topologies with sub-50-ms failover capabilities. ERP's promise to also provide protection in multi-ring mesh packet transport networks will position Ethernet as a serious competitor to conventional synchronous optical networking (SONET)/synchronous digital hierarchy (SDH) and the technology of choice for carrier networks. Operating ERP in multi-ring mesh networks, however, comes with unique challenges. This paper reveals some limitations of prior work which relied on exhaustive enumeration and proposes some modifications to overcome these subtle limitations. We also present an optimal ERP design formulation by jointly solving the problem of ring protection link placement and ring hierarchy selection whose objective is to minimize the overall capacity requirement. Our design approach is formulated as an integer linear program, which is shown to provide optimal capacity provisioning and be computationally scalable. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF
32. Green Packet Optical Transport Networks (P-OTNs) Based on Photonic PBB-TE Switches and Minimized EEE Overhead.
- Author
-
Nurujjaman, M., Sharifi-Rayeni, M., Assi, C., and Maier, M.
- Abstract
Carrier Ethernet exhibits an enormous potential to be a cost-effective and less complex replacement of SONET/SDH especially after the ratification of IEEE standard 802.1Qay Provider Backbone Bridge-Traffic Engineering (PBB-TE). The recent IEEE standard 802.3az Energy Efficient Ethernet (EEE) presents another opportunity for service providers to select Ethernet as a technology of choice in the backbone while leveraging on its promise for achieving green transport network. In this paper, we propose two novel architectures of photonic PBB-TE core and edge switches, which enhance the usability of PBB-TE networks by reducing power consumption in individual switches in conjunction with passive optical bypassing and EEE. We also formulate the problem of energy-aware scheduling as an optimization problem whose objective is to minimize the overall energy consumption for transmitting Ethernet frames while satisfying their delay requirements. This model will be used as a benchmark while evaluating the performance of packet coalescing, a promising and recently proposed approach, as well as the performance of EEE. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
- Full Text
- View/download PDF
33. An optical performance monitoring method for Carrier Ethernet networks using OAM continuity check messages.
- Author
-
Souza, Flávio and Ribeiro, Moisés
- Abstract
A key feature of Carrier Ethernet networks is its operation and management framework. The link state, in this context, is simply determined by the detection (or absence for a given period) of continuity check message (CCM) at the receiver end of a management end point. However, cross-layer information can be inexpensively gained by looking into the loss patterns of these CCM frames, especially when Carrier Ethernet is operating directly over wavelengths (Layer-1) from transparent optical links or networks. This paper experimentally demonstrates a case for optical signal-to-noise and optical signal-to-interference estimation from monitoring standard CCM frame loss frame rate. Moreover, the loss pattern signatures of such physical-layer impairments may give in-depth link state information for fault and performance management as it may give valuable clues about the dominant impairing phenomena. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
34. On Routing and Transmission-Range Determination of Multi-Bit-Rate Signals Over Mixed-Line-Rate WDM Optical Networks for Carrier Ethernet.
- Author
-
Batayneh, Marwan, Schupke, Dominic A., Hoffmann, Marco, Kirstaedter, Andreas, and Mukherjee, Biswanath
- Subjects
LOCAL area networks ,ETHERNET ,COMPUTER networks ,DATA transmission systems ,WAVELENGTH division multiplexing ,OPTICAL communications - Abstract
Ethernet's success in local area networks (LANs) is fueling the efforts to extend its reach to cover metro and long-haul networks. This new Ethernet is refereed to as Carrier Ethernet. Among the various transport infrastructures for realizing Carrier Ethernet, wavelength-division multiplexing (WDM) optical network is a strong candidate for this purpose. Optical transmission rates per channel are increasing from 10 to 40 Gb/s and even 100 Gb/s, and they can also coexist in the same fiber. Along with the flexibility associated with such a network with mixed-line rates (MLR), signal-related constraints at high rates become a challenge for cost-efficient routing. Among these issues is the maximum nonregenerated optical distance that a signal can travel before its quality degrades or maximum transmission range (TR). TR is rate-dependent: The higher the rate, the shorter the range. While high-rate pipes may require signal regeneration to restore the signal's quality, they support more traffic and, hence, can save resources. We study the problem of cost-efficient routing of multi-bit-rate (1/10/40/100 Gb/s) Ethernet tunnels using MLR over a carrier's WDM optical network with signal-transmission-range constraints. We studied the effect of TR for mixed-rate signals (10/40/100 Gb/s) on the network's cost to determine the optimal TR of each bit rate. We present an analytical model based on a mixed-integer linear program (MILP) to determine the optimal TR of a small network. Since MILP has scalability constraints that makes it hard or sometimes impossible to solve for real network topologies, we propose a graph-based solution that constructs a mixed-line-rate auxiliary (MLR-AUX) graph to capture the network's heterogeneity and a weight-assignment approach that allows the routing to be cost-efficient. Our algorithms were tested on a U.S. nationwide network topology. We found that it is possible to reduce the network's cost by using short TR and that the optimal TR depends strongly on traffic characteristics and on the TR values of different bit-rate signals. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
- Full Text
- View/download PDF
35. Performance Evaluation of Service-Aware Optical Transport System.
- Author
-
Jiwook Youn, Jea-Hoon Yu, and Tae-Whan Yoo
- Subjects
OPTICAL communications ,TELECOMMUNICATION systems ,DATA transmission systems ,BROADBAND communication systems ,LOCAL area networks ,DIGITAL communications ,ETHERNET ,FIBER optics industry ,ACCESS control of computer networks - Abstract
We propose and experimentally demonstrate a service-aware optical transport system. The proposed service-aware optical transport system makes a flow based on service type and priority of traffic. The generated flow is mapped to a corresponding sub-? for transport over an optical network. Using sub-λ provided by the centralized control plane, we could effectively provide quality-ofservice guaranteed Ethernet service and best-effort service simultaneously in a single link. The committed information rate (CIR) traffic and best-effort traffic are assigned to different sub-λs. The bandwidth of the CIR traffic is guaranteed without being affected by violation traffic because the bandwidth is managed per each sub-λ. The failure detection time and restoration time from a link failure is measured to be about 60 μs and 22 ms, respectively, in the ring network. The measured restoration time is much smaller than the 50 ms industry requirement for real-time services. The fast restoration time allows the proposed service-aware optical transport system to offer high availability and reliability which is a requirement for transport networks. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
36. Flush Optimizations to Guarantee Less Transient Traffic in Ethernet Ring Protection.
- Author
-
Kwang-Koog Lee and Jeong-dong Ryoo
- Subjects
ETHERNET ,LOCAL area networks ,FIBER Distributed Data Interface (Computer network standard) ,DATA transmission systems ,DATA protection ,ELECTRONIC data processing ,ENTERPRISE resource planning ,BROADBAND communication systems ,DIGITAL communications - Abstract
Ethernet ring protection (ERP) technology, which is defined in ITU-T Recommendation G.8032, has been developed to provide carrier grade recovery for Ethernet ring networks. However, the filtering database (FDB) flush method adopted in the current ERP standard has the drawback of introducing a large amount of transient traffic overshoot caused by flooded Ethernet frames right after protection switching. This traffic overshooting is especially critical when a ring provides services to a large number of clients. According to our experimental results, the traditional FDB flush requires a link capacity about sixteen times greater than the steady state traffic bandwidth. This paper introduces four flush optimization schemes to resolve this issue and investigates how the proposed schemes deal with the transient traffic overshoot on a multi-ring network under failure conditions. With a network simulator, we evaluate the performance of the proposed schemes and compare them to the conventional FDB flush scheme. Among the proposed methods, the extended FDB advertisement method shows the fastest and most stable protection switching performance. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
37. Service overlays for Ethernet LAN over SONET/SDH.
- Author
-
Ghani, N., Esmaeili, M., Wu, H., Qiao, Y., Wang, R., and Peng, M.
- Subjects
ETHERNET ,MULTIPLEXING ,PPP (Computer network protocol) ,ELECTRIC network topology ,SIMULATION methods & models ,STATISTICAL matching - Abstract
Abstract: Next-generation SONET/SDH provides carriers with new capabilities for building advanced Ethernet data services. Along these lines, numerous Ethernet-over-SONET studies have been done, with most focusing on point-to-point private line type services. This paper introduces the more challenging problem of provisioning multi-point-to-multi-point Ethernet LAN services over inverse-multiplexing networks and proposes novel overlay strategies based upon star, bus, and minimum spanning tree topologies. Multi-tiered protection schemes are also developed to help set up these respective overlay designs. Detailed simulation results are then presented along with directions for future work. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
38. The transition to service-driven networks: Addressing the challenge of on-demand, over-the-top and cloudbased communications.
- Author
-
Rathore, Vinay
- Subjects
BROADBAND communication systems ,COMPUTER software development ,BANDWIDTHS ,GSM communications ,COST effectiveness ,COMPUTER network architectures ,TECHNOLOGICAL innovations ,ETHERNET ,COMPETITIVE advantage in business - Abstract
From the explosion in YouTube traffic to the 'iPhone effect' on mobile broadband, or the rapid expansion of software as a service in the enterprise, service providers are faced with a new era of bandwidth demand driven by a new set of users. According to a 2006 report from Enterprise Strategy Group, anticipated bandwidth demands globally for services such as internet protocol (IP) video, multimedia messaging, internet access and corporate data connectivity are expected to exceed 23,000 petabytes per month by 2010, with a roughly 35 per cent compound annual growth rate from 2006 to 2010. In addition to growing bandwidth demand, carriers are faced with declining revenues per bit, increasing network churn and more traffic mix uncertainty than ever before. Consequently, these trends are forcing operators to change their approach to building networks and delivering services. To maintain growth, service providers need networks that enable rapid revenue expansion and service creation velocity while simultaneously lowering expenditures. To address these business challenges, transport networks must transition from circuit- to packet-optimised architectures and become more service-driven by introducing capabilities such as on-demand network programmability, intelligence and automation, and take advantage of technologies such as packet-optical, carrier Ethernet and even 100G in the long term. Service providers must radically transform their networks from a commodity to a differentiated asset while optical and carrier Ethernet networking equipment vendors must stay at the cutting edge of technology innovation to give their customers a competitive advantage. [ABSTRACT FROM AUTHOR]
- Published
- 2009
39. Examining Ethernet transmission practices: Evaluating the alternatives and exploiting them in the operator metro domain for UMTS backhauling.
- Author
-
Micali, Roberto
- Subjects
ETHERNET ,COMPUTER networks ,TELECOMMUNICATION ,UNIVERSAL Mobile Telecommunications System ,CELL phone systems ,WIDE area networks ,ASYNCHRONOUS transfer mode ,BROADBAND communication systems - Abstract
In the networking arena many actors claim that Ethernet (and now carrier Ethernet) is the nirvana for service providers' data transport. Is that true? Ethernet has been the winning technology in the enterprise local area network (LAN) environment and is probably the most successful networking technology ever developed. Not satisfied to remain confined within corporate LAN, Ethernet is targeted to expand outside the LAN environment, moving to the metropolitan area network (MAN) and wide area network (WAN). The technological alternatives to apply Ethernet in the WAN are proliferating, leading to the great tunnel debate': T-MPLS, PBB-TE or VXC? Telecom Italia has developed the optical packet metro (OPM) network, based on gigabit Ethernet over wavelength division multiplexing (WDM), to provide carrier Ethernet services for business, residential and wholesale customers and for mobile services transport (3G UMTS/HSDPA backhauling and DVB-H) on the same platform, with differentiated class of service/quality of service and service level agreement (SLA). Telecom Italia is actually backhauling the 3G network with pseudo wire over the OPM network. In this case, the asynchronous transport mode (ATM) traffic on the lub interface between node B and the radio network controller (RNC) is mapped by several gateway accesses (GTWA5) mostly co-located with node B and a number of gateway backbones (GTWBs) co-located with RNCs to multi-protocol label switching (MPLS)/Ethernet with pseudo wire. This solution, awarded the InfoVision Award 2006 by Broadband World Forum Europe in the category Metro Network Technologies and Services', allows savings in E1 circuits through convergence of traffic over a single, high-capacity, gigabit Ethernet structure. [ABSTRACT FROM AUTHOR]
- Published
- 2008
40. Carrier ethernet network operation scenario and the assessment of control cycle duration
- Author
-
Andrey Kanayev, Elina Login, Alexey Muravtsov, and Maria Sakharova
- Subjects
Computer science ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Control (management) ,Materials Chemistry ,Duration (project management) ,Simulation ,Carrier Ethernet - Abstract
Objective: To develop a formalized algorithm of carrier class network Carrier Ethernet operation and, by means of the latter, obtain an assessment of control cycle duration for intelligent control system (ISU) of the network in question. The given operation scenario is different from those currently in use by an account of processes of the new generation Carrier Ethernet network, failures’ identification and reconstruction of network elements by means of core control technologies of elements’ status (OAM technologies) and application of statistically defined change traffic (distributive laws) of Carrier Ethernet network elements’ status. Methods: In order to achieve the objective in question the following methods were applied: signature method, statistical method and neural networks. Results: The building principles of Carrier Ethernet network were presented and its OAM architecture was formed. In accordance with the analyzed types of Carrier Ethernet network connections and failure control mechanisms on the basis of OAM, control process and Carrier Ethernet network operation scenario was developed. Practical importance: The obtained operation scenario of the new generation network and the assessment of ISU control cycle of Carrier Ethernet network makes it possible to formulate the requirements to perspective operation system, whereas the assessment result of Carrier Ethernet network operation cycle duration allows one to determine probabilistically time response characteristics of network functioning and assess the input of different subprocesses in the total process time. The presented building principles of Carrier Ethernet network make it possible to solve the task halfway, which is aimed at the necessity of building a unified methodological basis for the formation of perspective operation system for the network in question.
- Published
- 2017
41. FlexRay and Ethernet AVB Synchronization for High QoS Automotive Gateway
- Author
-
Jae Wook Jeon, Jin-Ho Kim, and Young Seo Lee
- Subjects
Engineering ,Ethernet Powerlink ,Computer Networks and Communications ,business.industry ,Ethernet flow control ,Aerospace Engineering ,020302 automobile design & engineering ,02 engineering and technology ,Metro Ethernet ,020202 computer hardware & architecture ,FlexRay ,Synchronous Ethernet ,0203 mechanical engineering ,Embedded system ,Automotive Engineering ,0202 electrical engineering, electronic engineering, information engineering ,ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS ,Electrical and Electronic Engineering ,Ethernet over SDH ,business ,Connection-oriented Ethernet ,Computer network ,Carrier Ethernet - Abstract
Modern in-vehicle networks are comprised of heterogeneous systems that use various communication protocols with different source clocks. Moreover, gateway systems are designed with additional features that ensure converted/forwarded data meet real-time constraints. In this paper, we propose a synchronization mechanism for FlexRay and Ethernet audio video bridging (AVB) network that guarantees a high quality-of-service. We also designed the corresponding embedded system based-gateway system. Moreover, we built an in-vehicle network environment that consists of FlexRay and Ethernet AVB networks using an embedded system, which is integrated and synchronized by the gateway. We evaluate the synchronization performance of the proposed method using the developed gateway by conducting experiments as well as a theoretical analysis. The results of the experiment show that the synchronization mechanism provides timing guarantees for the FlexRay network that are similar to those of the Ethernet AVB network.
- Published
- 2017
42. NETWORK MANAGEMENT SOFTWARE FOR REDUNDANT ETHERNET RING
- Author
-
Alexandr Shevtsov and Waldemar Nowakowski
- Subjects
Synchronous Ethernet ,Ethernet Powerlink ,Computer science ,business.industry ,Ethernet over PDH ,Ethernet over SDH ,ATA over Ethernet ,business ,Connection-oriented Ethernet ,Metro Ethernet ,Computer network ,Carrier Ethernet - Published
- 2017
43. Modelling and evaluation of QCN using coloured petri nets
- Author
-
Lamia Chaari, Lotfi Kamoun, and Hela Mliki
- Subjects
Scheme (programming language) ,Computer Networks and Communications ,business.industry ,Computer science ,Quality of service ,Distributed computing ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,Coloured Petri net ,020206 networking & telecommunications ,020207 software engineering ,Cloud computing ,02 engineering and technology ,Petri net ,Network congestion ,CPN Tools ,0202 electrical engineering, electronic engineering, information engineering ,business ,computer ,Software ,Carrier Ethernet ,computer.programming_language ,Computer network - Abstract
Congestion management capability is an important requirement for any quality of services (QoS) networking technology. Therefore, IEEE 802.1Qau has proceeded a congestion notification project whose aim is to develop a Carrier Ethernet congestion control scheme at Layer 2 for a data center network. A data center network should be efficient and robust to handle the growing demands of cloud computing. A congestion control scheme is a key component of data transport in this kind of network. The quantized congestion notification (QCN) scheme is a congestion management scheme, which has been standardized and designed to be implemented in the Carrier Ethernet. Coloured Petri net (CPN) is a modelling technique used with the Petri nets modelling tool. This technique is exploited to model and simulate the QCN in order to help understand the QCN scheme and derive performance measures. This paper proposes a formal model for the QCN scheme. Then, we verify the implementation of our model by simulations. Thus, the QCN queue and rate performances are evaluated using the CPN tools. Moreover, an improved model called TAI-QCN is proposed in order to enhance the QCN scheme.
- Published
- 2017
44. An Implementation of Gateway System for Light-weight Ethernet Interface of Engine-part's Equipments of Small Vessels
- Author
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Il-Sik Shin, BaeSung Kim, Hyun-Woo Kim, JangSe Lee, and Hun-Gyu Hwang
- Subjects
Ethernet ,General Computer Science ,business.industry ,Computer science ,Interface (computing) ,computer.software_genre ,Operating system ,Industrial Ethernet ,business ,ATA over Ethernet ,computer ,Computer network ,Gateway system ,Carrier Ethernet - Published
- 2017
45. RPE: A Seamless Redundancy Protocol for Ethernet Networks
- Author
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Jong Myung Rhee and Nguyen Xuan Tien
- Subjects
Ethernet ,Computer Networks and Communications ,Ethernet over PDH ,business.industry ,Computer science ,020206 networking & telecommunications ,02 engineering and technology ,020210 optoelectronics & photonics ,Synchronous Ethernet ,RDMA over Converged Ethernet ,Embedded system ,0202 electrical engineering, electronic engineering, information engineering ,Redundancy (engineering) ,Electrical and Electronic Engineering ,Ethernet over SDH ,business ,Software ,Connection-oriented Ethernet ,Carrier Ethernet ,Computer network - Published
- 2017
46. Realization of Ethernet data transmission system on FPGA
- Author
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徐东东 Xu Dong-dong, 贲广利 Ben Guang-li, 郑佳宁 Zheng Jia-ning, 吴铮 Wu Zheng, and 王永成 Wang Yong-cheng
- Subjects
Ethernet ,Computer science ,business.industry ,Ethernet flow control ,Electronic, Optical and Magnetic Materials ,Synchronous Ethernet ,RDMA over Converged Ethernet ,Embedded system ,Signal Processing ,Ethernet over SDH ,business ,ATA over Ethernet ,Instrumentation ,FPGA prototype ,Carrier Ethernet - Published
- 2017
47. Verification of 10 Gigabit Ethernet Controllers
- Author
-
I.A. Stotland, R.E. Mushtakov, and M.V. Petrochenkov
- Subjects
Ethernet Powerlink ,пропускная способность ,business.industry ,Computer science ,uvm ,Ethernet flow control ,Jumbo frame ,контроллер сетевых интерфейсов ,lcsh:QA75.5-76.95 ,верификация ,Synchronous Ethernet ,10 гигабитный ethernet ,Network interface controller ,General Earth and Planetary Sciences ,Industrial Ethernet ,тестовая система ,lcsh:Electronic computers. Computer science ,business ,ATA over Ethernet ,Computer hardware ,General Environmental Science ,Carrier Ethernet - Abstract
This article proposes approaches used to verify 10 Gigabit Ethernet controllers developed by MCST. We present principles of the device operation - they provide a set of memory-mapped registers and use direct memory access, and their characteristics. We describe a set of approaches used to verify such devices - prototype based verification, system and stand-alone verification. We provide the motivation for the chosen approach - combination of system verification with stand-alone verification of its single component. The structure of the test systems that we used to verify devices and their components are presented. Test system of the controller transmits Ethernet frames to the network and receives frames from it. Algorithms to transfer packet to representation used by the device were implemented. Stand-alone test system was developed for a connector module between internal device buses and its external interface. Test systems were developed using UVM. This methodology and structure of test systems allowed to reuse components in a different systems. A set of test scenarios used to verify the device is described. The examination of network characteristics of the controller is very important in the verification process. Some approaches and techniques for throughput measuring and modes of device operations for the measurement are described. We present measured throughput in different modes. In conclusion, we provide a list of found errors and their distribution by different types of functionality they affected.
- Published
- 2017
48. Enabling Optical Network Test Bed for 5G Tests
- Author
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Alessandro Valenti, Marco Giuntini, Francesco Matera, Vincenzo Attanasio, E. Nastri, P. Grazioso, and Silvia Di Bartolo
- Subjects
Engineering ,Multicast ,business.industry ,020206 networking & telecommunications ,02 engineering and technology ,WiMAX ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Network planning and design ,020210 optoelectronics & photonics ,Broadcasting (networking) ,0202 electrical engineering, electronic engineering, information engineering ,Wireless ,business ,5G ,Heterogeneous network ,Computer network ,Carrier Ethernet - Abstract
In this work, we show some experimental approaches concerning optical network design dedicated to 5G infrastructures. In particular, we show some implementations of network slicing based on Carrier Ethernet forwarding, which will be very suitable in the context of 5G heterogeneous networks, especially looking at services for vertical enterprises. We also show how to adopt a central unit (orchestrator) to automatically manage such logical paths according to quality-of-service requirements, which can be monitored at the user location. We also illustrate how novel all-optical processes, such as the ones based on all-optical wavelength conversion, can be used for multicasting, enabling development of TV broadcasting based on 4G–5G terminals. These managing and forwarding techniques, operating on optical links, are tested in a wireless environment on Wi-Fi cells and emulating LTE and WiMAX systems by means of the NS-3 code.
- Published
- 2016
49. Higher Bandwidth Automotive-grade Ethernet and Distributed Vehicle Networks
- Author
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Jan-Philipp Gehrmann and Günter Sporer
- Subjects
Ethernet ,Computer science ,Ethernet over PDH ,business.industry ,020206 networking & telecommunications ,02 engineering and technology ,Metro Ethernet ,Synchronous Ethernet ,Embedded system ,0202 electrical engineering, electronic engineering, information engineering ,General Earth and Planetary Sciences ,020201 artificial intelligence & image processing ,Ethernet over SDH ,ATA over Ethernet ,business ,Connection-oriented Ethernet ,General Environmental Science ,Carrier Ethernet ,Computer network - Published
- 2016
50. Data traffic congestion management for data center ethernet
- Author
-
Shuo Fang, Foh Chuan Heng, and School of Computer Engineering
- Subjects
Ethernet ,Data traffic ,business.industry ,Computer science ,Ethernet flow control ,Engineering::Computer science and engineering::Computer systems organization::Computer-communication networks [DRNTU] ,Data center ,Congestion management ,business ,Connection-oriented Ethernet ,Metro Ethernet ,Carrier Ethernet ,Computer network - Abstract
Ten-gigabit Ethernet was first standardized in 2002. Over the years, the success standardization has led to wide acceptance and commercialization in the industry. Ethernet has offered an attractive solution for data center to consolidate heterogeneous traffic into a single fabric. A data center usually consists of three overlapped networks, Storage Area Network (SAN), Local Area Network (LAN) and High Performance Computing (HPC) Network. To satisfy their specialized requirements, each of them transmits traffic through dedicated fabrics. Replacing dedicated switches, transceivers and adapters with Ethernet components, the consolidation reduces both capi- tal expenditure (CAPEX) and operational expenditure (OPEX). Although Ethernet exhibits many advantages, one must admit that it remains inad- equate due to the lack of congestion management support. In this thesis, an Ethernet congestion management solution is proposed to satisfy require- ments of loss-free, high throughput, and preferably, minimal energy usage for data center networks. Conventional Ethernet only offers best effort delivery which tolerates frame drops, whereas SAN/HPC traffic is sensitive to loss. The consolidation solution should control congestion to ensure SAN/HPC traffic free from loss with higher priorities. Moreover, Ethernet uses Spanning Tree Proto- col (STP) to prevent loops which prunes a mesh topology to a single tree structure eliminating redundancies and reducing network throughput. To preserve high bisectional bandwidth, the solution should enhance Ether- net with multipath feature to ease congestions. In addition, utilization of multipath, though increases network throughput, exerts extra power con- sumption by distributing traffic amongst all the paths when there is limited volume of traffic. The tradeoff of load balance or aggregation becomesanother research topic for adapting congestion with economizing data cen- ter cost. Thus a comprehensive Ethernet congestion management solution should satisfy three requirements, namely prioritize congestion control, high throughput congestion easing and energy efficient congestion adaptation. However, no systematic study has been found of such an approach. This research is conducted to fill the gap of existing approaches and ex- plore the possibility of an enhanced Ethernet congestion management for data centers. Firstly, a prioritized end-to-end congestion control scheme is proposed to combat congestion and protect traffic with higher through- put requirements, by introducing Active Queue Management (AQM) and Addictive Increase and Multiplicative Decrease (AIMD) to detect and con- strain source rates towards congestions. Systematic analytical work is also presented to study suitability of the proposal and recommendation of sys- tem parameters. Secondly, an in-depth study is conducted to investigate on multipath routing, where a central controller overviews network status and controls generation and distribution of traffic. This two-tiered study not only effectively eases congestion by a fine grained load balance but also throttles excessive traffic from entering network core. Finally, being aware that load balance among multiple paths is at odds with efficient energy usage, the relationship between power consumption and number of active links is studied and found to be in a linear order. A proposal for energy optimization that dynamically balances load and adapts link rate with con- gestions is then presented to achieve minimal power consumption without compromising on throughput. All these three studies are validated by ex- tensive simulations using OMNET++ simulator, which demonstrates the favorable performance of these schemes proposed. In summary, we propose prioritized congestion control that achieves ratio differentiation and combats congestion, loss-free multipath routing that distributes load almost equally to ease congestion and maximize network throughput, and efficient energy optimization that adapts load distribution and aggregation with congestion state. The congestion management solution proposed has achieved the ob- jectives of the study with 3.5 SAN/LAN ratio, two-folded traffic volume support and up to 60% power savings. DOCTOR OF PHILOSOPHY (SCE)
- Published
- 2019
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