Relevant bibliographies by topics / Next Generation Optical Access network

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Next Generation Optical Access network'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Next Generation Optical Access network"

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Kuznetsov, M., N. M. Froberg, S. R. Henion, H. G. Rao, J. Korn, K. A. Rauschenbach, E. H. Modiano, and V. W. S. Chan. "A next-generation optical regional access network." IEEE Communications Magazine 38, no. 1 (2000): 66–72. http://dx.doi.org/10.1109/35.815454.

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Kazovsky, Leonid G., Wei-Tao Shaw, David Gutierrez, Ning Cheng, and Shing-Wa Wong. "Next-Generation Optical Access Networks." Journal of Lightwave Technology 25, no. 11 (November 2007): 3428–42. http://dx.doi.org/10.1109/jlt.2007.907748.

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Al-RUBAYE, Saba, Anwer AL-DULAIMI, and Hamed Al-RAWESHIDY. "Next Generation Optical Access Network Using CWDM Technology." International Journal of Communications, Network and System Sciences 02, no. 07 (2009): 636–40. http://dx.doi.org/10.4236/ijcns.2009.27071.

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Kramer, G., and G. Pesavento. "Ethernet passive optical network (EPON): building a next-generation optical access network." IEEE Communications Magazine 40, no. 2 (2002): 66–73. http://dx.doi.org/10.1109/35.983910.

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Chanclou, Philippe, Anna Cui, Frank Geilhardt, Hirotaka Nakamura, and Derek Nesset. "Network operator requirements for the next generation of optical access networks." IEEE Network 26, no. 2 (March 2012): 8–14. http://dx.doi.org/10.1109/mnet.2012.6172269.

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Yuang, Maria, Cedric Lam, Hideo Kuwahara, and Alan Willner. "Next-generation broadband optical access network technologies [Guest editorial." IEEE Journal on Selected Areas in Communications 28, no. 6 (August 2010): 769–72. http://dx.doi.org/10.1109/jsac.2010.100801.

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Cvijetic, Neda. "OFDM for Next-Generation Optical Access Networks." Journal of Lightwave Technology 30, no. 4 (February 2012): 384–98. http://dx.doi.org/10.1109/jlt.2011.2166375.

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Skubic, Bjorn, Einar In de Betou, Tolga Ayhan, and Stefan Dahlfort. "Energy-efficient next-generation optical access networks." IEEE Communications Magazine 50, no. 1 (January 2012): 122–27. http://dx.doi.org/10.1109/mcom.2012.6122542.

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Luo, Yuanqiu, Meng Sui, and Frank Effenberger. "Energy-efficient next generation passive optical network supported access networking." Optical Switching and Networking 14 (August 2014): 43–52. http://dx.doi.org/10.1016/j.osn.2014.01.007.

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Breuer, Dirk, Frank Geilhardt, Ralf Hulsermann, Mario Kind, Christoph Lange, Thomas Monath, and Erik Weis. "Opportunities for next-generation optical access." IEEE Communications Magazine 49, no. 2 (February 2011): s16—s24. http://dx.doi.org/10.1109/mcom.2011.5706309.

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Dissertations / Theses on the topic "Next Generation Optical Access network"

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Mahloo, Mozhgan. "Reliability versus Cost in Next Generation Optical Access Networks." Licentiate thesis, KTH, Optical Network Laboratory (ON Lab), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122380.

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The ever increasing demands of Internet users caused by the introduction of new high bandwidth applications and online services as well as the growing number of users and devices connected to the Internet, bring many challenges for the operators, especially in the last mile section of the network. Next generation access architectures are expected to offer high sustainable bandwidth per user. They also need to support a much larger service areas to decrease number of current central offices and hence potentially save the network expenditures in the future. Obviously, it requires high capacity and low loss transmission and optical fiber technology is the only future proof candidates for broadband access. Although this technology has already been widely deployed in the core networks, it is hard to use the same expensive devices made for core segment to solve the last mile bottlenecks, due to the low number of users sharing the network resources (and deployment cost). Therefore, the next generation optical access (NGOA) networks need to be designed with consideration of cost efficiency in the first place.   Network reliability is also turning to be an important aspect for the NGOA networks as a consequence of long reach, high client count and new services requiring uninterrupted access. Consequently, new architectures not only need to be cost efficient but also they should fulfill the increasing reliability requirements.   Although several NGOA alternatives have been proposed in the literatures, there is not yet an agreement on a single architecture. As described earlier, network expenditure and reliability performance are the two main factors to be considered. Therefore, this thesis concentrates on finding a suitable alternative for future broadband access by evaluating the reliability performance and total cost of ownership for several NGOA candidates. In particular, in this thesis we analyze the tradeoff between the cost needed to deploy backup resources and the reliability performance improvement obtained by the provided survivability mechanism.   First, we identified the suitable NGOA candidates by comparing two main groups of optical access networks, namely passive optical networks (PONs) and active optical networks (AONs), in terms of cost, reliability performance and power consumption. The initial results have shown that wavelength division multiplexing PON (WDM PON) is the most promising alternative for the NGOA networks because of its high potential capacity, low cost and power consumption. So we continued our studies by investigating two WDM-based PON architectures regarding their cost and reliability performance. The study has also included a proposed fiber layout compatible with these two candidates aiming to minimize the required investment needed to offer protection. Our primary results confirmed that hybrid PON (HPON) is the best alternative for the NGOA networks. Therefore we further analyzed this candidate considering several variants of HPON. The most important components and sections of the HPON, which need to be protected to decrease the impact of each failure in the network have been identified. Based on these outcomes, two resilience architectures protecting the shared part of the HPON were proposed and their reliability performance parameters as well as cost of protection were evaluated. According to the results, using our proposed protection schemes a considerable improvement in reliability performance of the HPON variants can be provided at minor extra investment. We also introduced a cost efficient HPON architecture with different levels of protection for users with various reliability requirements, i.e. the protection of shared parts of the access network for all the connected users and end-to-end resilience scheme for some selected ones (e.g., business users). To gain an overall view on the cost efficiency of the proposed architecture, we evaluated the investment required for deploying these schemes considering several network upgrading paths towards a protected network. Moreover, a sensitivity analysis investigating the influence of network deployments time and the density of the users with higher availability requirements was presented.   In summary, we have shown that HPON is able to fulfill the main NGOA requirements such as high bandwidth per-user, large coverage and client count. The work carried out in the thesis has proved that HPON can also offer high reliability performance while keeping the network expenditures at an acceptable level. Moreover, low power consumption and high flexibility in resource allocation of this architecture, makes it a winning candidate for the NGOA networks. Therefore, HPON is a promising architecture to be deployed as NGOA network in the near future considering the fact that components are soon to be available in the market.

QC 20130530


FP7 EU project, Optical Access Seamless Evolution(OASE)
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Shahpari, Ali. "Next generation optical access networks : technologies and economics." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/14857.

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Doutoramento em Engenharia Eletrotécnica - Telecomunicações
The work presented herein, studies Next Generation Optical Access Networks (NG-OAN) economically (e.g. energy consumption) and technologically (e.g. rate, reach and dedicated/shared bandwidth). The work is divided into four main topics: energy efficiency in optical access architectures, novel spectrally efficient Long-Reach Passive Optical Networks (LR-PON), crosstalk impacts in heterogeneous and homogenous access networks and hybrid optical wireless transmissions. We investigate the impact of user profiles, optical distribution network topologies and equipment characteristics on resource sharing and power consumption in LR-PON. To have a clear vision on the energy consumption evolution of each part of NG-OAN, a model is proposed to evaluate the energy efficiency of optical access technologies. A spectrally efficient bidirectional Ultra-Dense Wavelength Division Multiplexing (UDWDM) PON architecture is developed using Nyquist shaped 16-ary quadrature amplitude modulation, offering up to 10 Gb/s service capabilities per user or wavelength. Performance of this system in terms of receiver sensitivity and nonlinear tolerance under different network transmission capacity conditions are experimentally optimized. In bi-directional transmis-sion, using frequency up/down-shifting of Nyquist pulse shaped signal from optical carrier, a full bandwidth allocation and easy maintenance of UDWDM networks as well as reduction of Rayleigh back-scattering are achieved. Moreover, self-homodyne detection is used to relax the laser linewidth requirement and digital signal processing complexity at the optical network unit. Simplified numerical model to estimate the impact of Raman crosstalk of multi-system next generation PONs in video overlay is proposed. Coexistence of considered G.98X ITU-T series and coherent multi-wavelength systems is considered and assessed. Additionally, the performances of bidirectional hybrid optical wireless coherent PONs over different optical distribution network power budgets and hybrid splitting ratios are evaluated.
O trabalho aqui apresentado estuda redes óticas de acesso de próxima geração (NG-OAN) nas vertentes económica (consumo de energia) e tecnológica (taxa, alcance e largura de banda dedicada/partilhada). O trabalho está dividido em quatro grandes temas de investigação: a eficiência energética em arquiteturas de acesso ótico, as redes óticas passivas de longo alcance (LR-PON) com nova eficiência espetral, o impacto da diafonia em redes de acesso heterogéneas e homogéneas e as transmissões ópticas híbridas com tecnologias sem fio. Investiga-se o impacto dos perfis dos utilizadores, as tipologias da rede de distribuição ótica, as características do equipamento de partilha de recursos e o consumo de energia em LR-PON. Para se ter uma visão clara sobre o consumo de energia de cada parte das NG-OAN, é proposto um modelo para avaliar a eficiência energética das tecnologias de acesso óticas. Desenvolve-se uma arquitetura PON bi-direcional com elevada eficiência espetral, recorrendo a multiplexagem por divisão de comprimento de onda ultra-densa (UDWDM), modulação de amplitude em quadratura com formato de impulso de Nyquist, oferecendo até 10 Gb/s por utilizador/comprimento de onda. O desempenho deste sistema em termos de sensibilidade do recetor e da tolerância à resposta não linear do canal de comunicação, sob diferentes condições de transmissão, é avaliado experimentalm-ente. Em transmissão bi-direcional, utilizando desvio de frequência (cima/baixo) do impulso com formato de Nyquist relativo à portadora ótica conseguiu-se uma alocação de largura de banda completa e uma manutenção mais simplificada de redes UDWDM, bem como a redução do espalhamento de Rayleigh. Além disso, a deteção auto-homodina é usada para relaxar o requisito de largura de linha do laser e a complexidade do processamento digital de sinal nas unidades da rede ótica. Propõe-se um modelo numérico simplificado para estimar o impacto da diafonia de Raman em sistemas PON de próxima geração, com sobreposição do sinal de vídeo. É analisada a coexistência da série G.98X ITU-T e são considerados e avaliados sistemas coerentes multi-comprimento de onda. Adicionalmente avaliam-se os desempenhos de PONs bi-direcionais híbridas, considerando tecnologia coerente e propagação por espaço livre, para diferentes balanços de potência e taxas de repartição na rede ótica de distribuição.
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Chu, Guang Yong. "Photonic devices for next generation fiber-to-the-home access network." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/386564.

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It would be unaffordable if the WDM-PON technologies were directly applied for massive deployment. Hence, the potential WDM-PON is to be integrated and improved in order to adapt it for NGPON and the future 5G. The UDWDM-PON can be considered as an ultimate solution for the next-generation access network capable of providing unlimited bandwidth for each user, thanks to the coherent detection. Plenty of scientists have believed that it is crucial to increase the operating speed and maximum reach of WDM-PON, while it has no sense if people achieve them without a ordable cost. In order to apply them cost-effciently, the system should require colorless ONUs and bidirectional systems. It is desired that the whole system use modulators on a low bias consumption, even limit the number of amplifiers. However, for bidirectional transmission the backscattering effects would limit the performance if we want to reuse the carrier from OLT. So, we should design a method to separate the wavelength between upstream and downstream. The traditional UDWDM-PON uses 2 laser at ONU, in this thesis, the single-DFB based ONUs are presented with integrated devices. What is the most plausible configuration? The photonic devices such as RSOA, DEML, FML with advanced configurations are presented in this thesis with different applications. The proposed thesis includes these parts: key devices for WDM-PON and the chirp parameters of these integrated photonic devices are measured, the polarization independent RSOA with different applications is also included, demonstration of dual output DEML with bidirectional coherent UDWDM-PON transmission, mitigating residual AM of DEML for phase modulation, and fast tuning for the UDWDM channel via FML are described.
Por sus altos requerimientos técnicos, sería inasumible aplicar las tecnologías WDM-PON directamente para el despliegue masivo de Fiber-to-the-Home de nueva generación. Por lo tanto, el potencial se WDM-PON se debe integrar y mejorar con el fin de adaptarlo para NGPON y el futuro 5G. Hoy dia, operadores, usuarios y científicos, ven crucial augmentar la velocitat de funcionament y el alcance de las redes de acceso PON, si bien no tiene sentido conseguirlo con un coste inasequible. El UDWDM-PON puede considerarse como una solución definitiva para la red de acceso de próxima generación, capaz de proporcionar ancho de banda ilimitado para cada usuario, gracias a la detección coherente, por lo que en esta tesis se aborda su realización con un coste e integración prácticos. Con el fin de aplicarlos de manera rentable, el sistema debería exigir a las ONU que sean idénticas, si láseres preseleccionados o incoloros, y ser bidireccionales. Se desea que el conjunto de moduladores del sistema tengan en un bajo consumo, e incluso limitar el número de amplificadores. Sin embargo, para la transmisión bidireccional los efectos de retrodispersión limitarían el rendimiento si queremos volver a utilizar la portadora generada en la OLT. Por lo tanto, debemos diseñar un método para separar la longitud de onda en las transmisiones de bajada y de retorno del usuario a la central. El tradicional UDWDM-PON utiliza 2 láseres en la ONU; en esta tesis, las ONUs usan dispositivos integrados basados en un sólo DFB. ¿Cuál es la configuración más plausible? Los dispositivos fotónicos como RSOA, DEML, FML con configuraciones avanzadas se presentan en esta tesis con diferentes aplicaciones, que resuelven distintos problemas técnicos. La tesis incluye las siguientes partes: análisis y medida de dispositivos fotónicos clave para WDM-PON con modulación de fase, la independencia a la polarización de RSOA con diferentes aplicaciones, demostración de DEML con doble salida para transmisión bidireccional coherente UDWDM-PON, mitigación de AM residual de DEML para la modulación de fase, y la sintonía rápida de canal de UDWDM a través de FML.
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Okonkwo, Igweani Uchenna Titus. "Optical fiber transmission systems for in-door next generation broadband access network." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10539.

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This thesis investigates the generation and radio-over-fibre (RoF) transport of unlicensed 60 GHz millimetre-wave (mm-wave) frequency band. The investigated benefits of transmission schemes applicable for the mm-wave generation include optical carrier suppression (OCS), optical frequency multiplication (OFM) and remote heterodyne detection (RHD). For the in-door cabling of the mm-wave transmission, a low-cost polymer optical fibre (POF) along with bend-insensitive single mode fibre (BI-SMF) has been investigated for short-range networks. Transporting mm-wave generated signals over POF and BI-SMF cables based on OCS scheme showed results with the highest spectral efficiency and least inter-symbol interference over a 2.5 Gbit/s data delivery. Based on this thesis analysis, OCS simulation of POF showed the most reliable power penalty performance and receiver sensitivity at 30-m whilst the BI-SMF fiber produced equal observations at 150-m and more. In observing the free space links of delivering the RoF signal, the attenuation on the received signal power for both POF and BI-SMF was insignificant but expected, as the simulation assumed complete and total collimation of the light beams onto the aperture of the photodetector. OCS scheme for mm-wave generation and transport was explored based on the cost effectiveness of using one external modulator compared to other generation schemes that utilised more than one external modulator. OFM scheme was simulated to transport LTE and Wi-Fi signals along with 60 GHz RF band through both SMF and MMF-POF/BI-SMF cables. OFM transport scheme produced the highest attenuation on LTE, Wi-Fi and mm-wave signals carrying 100 Mbit/s data as simulated POF lengths increased. The best performance POF length was observed at 10-m. The application of offset launch technique at the coupling of SMF and POF showed insignificant improvement on signal bandwidth. The free space OFM transmission also demonstrated negligible change to the received signal power. This reinforces the attributes of deploying OWC system in an in-door environment. In other investigation, the simulated successful delivery of mm-wave signal using RHD scheme modulated and transported 10 Gbit/s data signal over POF and BI-SMF cables. Additional observed unrecorded result also showed BI-SMF cable maintained a 2% reduction of received power for 450-m fiber cable from 150-m. The attributes to RHD includes its low operating power system application and delivery of localised 60 GHz signal for uplink RoF transmission. The conceptualised design of Gigabit data delivery for indoor customer applications either through POF or BI-SMF cable, transporting various wireless channels has been presented in this thesis for the design of a robust next generation Broadband access network to reinforce the fiber-inside-the-home (FiTH) deployment.
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Tsutsumi, Takuya. "Field Measurement and Analysis of Next-Generation Optical Access Network with Optical Amplifiers." Kyoto University, 2018. http://hdl.handle.net/2433/232417.

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Kelso, Douglas Ross. "Open access to next generation broadband." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16612/.

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Wireline telecommunications infrastructure in the customer access network or CAN is undergoing a veritable technological and commercial revolution. The paired-copper CAN is being modernised with optical fibre deployed ever closer to customers, culminating soon with fibre-to-the-home networks or some variant thereof. Although bandwidth ceases to be a scarce commodity, the underlying natural monopoly will most likely be strengthened. National competition policy desires open access to multiple service providers yet commercial pressure calls for closure. This has been the recent experience with the hybrid fibre coaxial networks delivering pay television and Internet access. This research asks the question: What are the factors that prevent open access to the broadband services of next generation wireline infrastructure? How can these obstacles be overcome? A particular focus is given to non-price considerations which come to the fore due to the unique strategic and technological characteristics of optical fibre in the access network. The methodological approach involves data gathering via three case studies - that of the Telstra/Foxtel pay television network, the TransACT broadband network and fibre-to-the-home networks in general. Although the ultimate focus is on the research question above, these cases are discussed in a holistic way with consideration of a number of contextual factors. The research also examines the relationship between the concepts of 'open access' and 'network neutrality', visiting the concept of 'common carriage' in doing so. Several findings are reached that illuminate the field of telecommunications access regulation as applied to infrastructure capable of delivering truly next generation broadband services. Since 1993, our politicians have only paid lip service to the importance of competition and have deferred to the demands of the dominant builder of telecommunications infrastructure. From the viewpoints of end-users and access seekers, the access regime is found to be incapable of dealing with the technical and commercial bottlenecks arising from optical fibre in the CAN. It is concluded that communication between users should be recognised as the prime purpose of telecommunications and that the regulatory regime should not reward discriminatory practices detracting from the development of a networked information economy. It is also concluded that dominant players should never be rewarded with access holidays which could otherwise entrench market dominance through the creation of new bottlenecks. Access regulation is ill-equipped to cope with optical fibre in the CAN until it also recognizes the strategic potential of such infrastructure.
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Fervença, Christophe Daniel da Silva. "Multiple system configuration for next generation optical access networks." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21639.

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Mestrado em Engenharia Eletrónica e Telecomunicações
O Crosstalk de Raman na camada de vídeo está em focus. A coexistência é simulada em laboratório e analisada com sinais 4-PAM e UDWDM com modulação QPSK e DP-QPSK. Pulso rectangular (mais conhecido como NRZ) e pulso de Nyquist. A densidade espectral de potência é analisada como um elemento notável que afecta o Crosstalk.
Raman Crosstalk on Video Overlay is in focus. Coexistence is simulated in laboratory and analysed with 4-Pulse Amplitude Modulation (4-PAM) and Ultra Dense Wavelength Division Multiplexing (UDWDM) with Quaternary- Phase-Shift Keying (QPSK) and Dual Polarization - Quaternary-Phase-Shift Keying (DP-QPSK) signal. Rectangular (Or also known as Non-Return-to- Zero (NRZ)) pulse shaping and Nyquist pulse shaping. Power Spectral Density (PSD) is analysed as a noticeable element a ecting crosstalk.
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Velásquez, Micolta Juan Camilo. "Next generation optical access networks and coexistence with legacy PONs." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667428.

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Nowadays, Fiber-to-the-Home is one of the most promising solutions to provide broadband services in access networks. However, the fiber is inefficiently used as most of the deployed systems are still based on Time Division Multiplexing Passive Optical Networks (TDM-PONs) providing shared transmission capacities up to 2.5 Gb/s down and 1.25 Gb/s up, among multiple users. Research on high-speed electronics and Wavelength Division Multiplexing (WDM) has allowed the emergence of what is known as the second generation PON (NG-PON2), which specify aggregated capacities up to 40 Gb/s, stacking four channels at symmetric data rates of 10 Gb/s each, for residential scenarios. Nevertheless, the capacity per channel is still shared between multiple users due to the use of TDM. Moreover, the optical spectrum efficiency is low because channels are widely spaced (50 to 100 GHz). In addition, the sensitivity, reach and number of users is limited as consequence of using direct detection (DD) systems. In consequence, and due to the increase in bandwidth demands of new multimedia applications, it is necessary to propose solutions that cope with this tendency and, even more important, that can coexist with legacy systems, being one of the major requirements of network operators to guarantee a smooth and non-disruptive technology migration. In this thesis, a breakthrough technology such as Ultra-Dense WDM (UDWDM) that allows to allocate a large number of channels spaced only by a few GHz is used. This approach consent to envision the concept of Wavelength-to-the-User, where each costumer can be served with dedicated bandwidth links. The key technologies are based on coherent systems, with inherent wavelength selectivity and improved sensitivity compared to DD systems, thanks to the booster action of a tunable local oscillator (LO) laser. Because of cost is the main constraint in access networks, especially at the customer premises equipment (Optical Network Unit - ONU), in this thesis, a new class of coherent transceivers, based on low-cost direct modulated lasers and simplified receiver schemes, are proposed and experimentally tested. Moreover, the issue of coexistence is investigated through theoretical studies and real-time implementations, demonstrating full compatibility with legacy systems. Between the proposed solutions, a simple technique to adjust digitally the direct phase modulation of a distributed feedback (DFB) laser is presented to support flexible transmission rates. Next, several multilevel phase modulation formats for achieving higher transmission rates and better spectral efficiency are experimentally compared. Subsequently, the topic of photonic integration is addressed, demonstrating for the first time an 8-ary hybrid amplitude and phase modulated transmitter (Tx), by using a low-cost, small-footprint and energy efficient dual electro-absorption modulated laser (DEML). Finally, two novel proposals, to reduce the complexity of heterodyne and intradyne detection, are provided to face the typical issue of complexity and high-cost of coherent systems. The former explores the possibility of using only one DFB laser as LO and Tx at the ONU. The later demonstrates for the first time, a novel phase time diversity technique alternating phase modulation at each complex component (in-phase - I and quadrature - Q) achieving a 10 Gb/s' transmission with polarization independence.
En la actualidad, la Fibra hasta el Hogar es una de las soluciones más prometedoras para proporcionar servicios de banda ancha en las redes de acceso. Sin embargo, la fibra se usa de manera poco eficiente, ya que la mayoría de los sistemas implementados todavía están basados en redes ópticas pasivas de multiplexación por división en el tiempo (TDM-PON) que brindan capacidades de transmisión compartidas entre múltiples usuarios de hasta 2.5 Gb/s y 1.25 Gb/s. La investigación en electrónica de alta velocidad y la multiplexación por división de longitud de onda (WDM) ha permitido el surgimiento de lo hoy se conoce como PON de segunda generación (NG-PON2), que especifica capacidades agregadas de hasta 40 Gb/s, apilando cuatro canales a velocidades de datos simétricas de 10 Gb/s cada uno, para escenarios residenciales. Sin embargo, la capacidad por canal todavía se comparte entre múltiples usuarios debido al uso de TDM. Además, la eficiencia en el uso del espectro óptico es baja porque los canales están muy separados (50 a 100 GHz). Asimismo, la sensibilidad, el alcance y el número de usuarios están limitados debido al uso de sistemas de detección directa. En consecuencia, y debido al aumento de las demandas de ancho de banda de las nuevas aplicaciones multimedia, es necesario proponer soluciones que respondan a esta tendencia y, lo que es más importante, que puedan coexistir con sistemas heredados, siendo uno de los principales requisitos de los operadores de red para garantizar una migración de tecnología fluida y sin interrupciones. En esta tesis, se utiliza una tecnología de vanguardia, como la multiplexación por división ultra densa de longitud de onda (UDWDM) que permite distribuir un gran número de canales espaciados solo por unos pocos GHz. Este enfoque permite vislumbrar el concepto de longitud de onda para el usuario, donde cada cliente puede usar enlaces de ancho de banda dedicados. Las tecnologías clave están basadas en los sistemas coherentes, con selectividad de longitud de onda inherente y sensibilidad mejorada en comparación con los sistemas de detección directa, gracias al efecto de amplificación óptica de un láser oscilador local (LO) sintonizable. Debido a que el costo es la principal restricción en las redes de acceso, especialmente del equipo en las instalaciones del cliente (unidad de red óptica - ONU), en ésta tesis, una nueva clase de transceptores coherentes, basados en láseres de bajo coste modulados directamente y esquemas de recepción simplificados, son propuestos y probados experimentalmente. Además, el problema de la coexistencia es investigado a través de estudios teóricos y experimentos en tiempo real, demostrando compatibilidad total con los sistemas heredados. Entre las soluciones propuestas, se presenta una técnica simple para ajustar digitalmente la modulación de fase directa de un láser de retroalimentación distribuida (DFB), y admitir velocidades de transmisión flexibles. Acto seguido, se comparan experimentalmente varios formatos multinivel de modulación de fase, para lograr tasas de transmisión más altas y una mejor eficiencia espectral. Posteriormente, se aborda el tema de la integración fotónica, demostrando por primera vez un transmisor (Tx) con modulación híbrida de fase y amplitud de ocho puntos, mediante el uso de un dispositivo pequeño, de bajo coste y eficiente energéticamente, como lo es el láser dual de electro-absorción modulada (DEML). Finalmente, se presentan dos propuestas novedosas para reducir la complejidad de la detección heterodina e intradina, afrontando el problema típico de la complejidad y alto coste de los sistemas coherentes. La primera explora la posibilidad de usar solo un láser DFB en la ONU, como LO y Tx. La segunda, demuestra por primera vez, una nueva técnica de diversidad fase en el tiempo, que alterna la modulación de fase en cada componente del plano complejo (fase-I y cuadratura-Q) logrando una transmisión de 10 Gb / s / λ con independencia de polarización
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9

CABALLERO, DIEGO RODRIGO VILLAFANI. "EMBEDDED OTDR MONITORING SYSTEMS FOR NEXT GENERATION OPTICAL ACCESS NETWORKS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=32308@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
PROGRAMA DE DOUTORADO SANDUÍCHE NO EXTERIOR
Para suportar os requisitos das redes móveis de 5a geração (5G), os sistemas de comunicação óptica serão usados nas redes de acesso. Isso ocorre porque a evolução das RAN (Radio Access Networks) incluem a centralização do equipamento mais crítico para implantar pontos de acesso móveis de baixa potência, como DAS (Distributed Antenna Systems) e Small Cells. Os serviços emergentes solicitam a implantação de tecnologias de rádio sobre fibra com ênfase na eficiência de largura de banda, eficiência energética e alta confiabilidade. Neste âmbito, um monitoramento eficiente da camada física é imperativo para a operação dessas redes. O sistema de monitoramento deve fornecer uma localização de falhas em serviço, econômico, centralizado e com impacto mínimo para a transmissão de dados. Esta tese propõe vários sistemas de monitoramento incorporado no transceptor utilizando reflectometria óptica no domínio do tempo. Os sistemas de monitoramento são testados em diferentes sistemas de transmissão de dados e arquiteturas de rede, onde é apresentada uma validação simulada e outras experimentais.
In order to support the requirements for 5th generation mobile networks (5G), optical communication systems will be used in the access part of the network. This is because the evolution of radio access networks includes the centralization of the most critical equipment in order to deploy low power mobile access points, like distributed antenna systems and small cells. The emerging services call for the deployment of radio over fibre technologies with emphasis on bandwidth efficiency, energy efficiency and high reliability. Within this scope, an efficient monitoring of the physical layer would become essential for the operation of these networks. The monitoring system should provide in-service, cost efficient and centralized fault localization with minimum impact on data transmission. This thesis proposes several transceiver-embedded optical time domain reflectometry monitoring systems. The monitoring systems are tested over different data transmission systems and network architectures, where one architecture was simulated and several others experimentally validated.
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Abbood, Abdul Nasser Abdul Jabbar. "Optimised radio over fibre links for next generation radio access networks." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17019.

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Optical fibre has become the dominant theme of transmission in long haul, high data rate communication systems due to its tremendous bandwidth and low loss. Radio over Fibre (RoF) technology facilitates the seamless integration between wireless and optical communication systems and found to be the most promising solution to meet the exponential bandwidth demands expected for the upcoming years. However, the main bit-rate/distance limitation in RoF systems is the chromatic dispersion. In this thesis, the two generations of RoF technologies, namely Analogue RoF (ARoF) and Digital RoF (DRoF) are investigated. The overall aim of this research is to optimise the optical bandwidth utilisation of these two approaches for a typical transmission of the fronthaul link proposed in the next generation Centralised Radio Access Network (C-RAN). Consequently, a number of physical layer design scenarios for the optimised transmission of the Radio Frequency (RF) signals over a Standards Single Mode Fibre (SSMF) are demonstrated. Firstly, for an ARoF transmission, where the analogue RF signals are transported over SSMF using an optical carrier, a bidirectional link transmitting four Downlink/Uplink channels in a chromatic dispersion limited scenario is designed. Simulation results have shown a clear constellation diagram of a 2.5 Gb/s RF signal transmission over 120 km fibre length. Secondly, a DRoF system with reduced optical bandwidth occupancy is proposed. This system employs an optical Duobinary transmission to the digitised RF signal at the transmitter side to reduce its spectrum and to address the chromatic dispersion effect, simultaneously. Simulation results demonstrate the capability of the proposed system to maintain high-quality transmission of the digitised signals over 70 km of fibre distance without dispersion compensation requirements. Finally, an advanced DRoF transmission link based on integrating digital Optical Single Sideband (OSSB) transmission with Duobinary encoding scheme is designed. Simulation results have clearly verified system's robustness against transmission impairments and have better performances in terms of the obtained BER and EVM with respect to the 3GPP standardised values. Moreover, the results show that both transmission distance and power budget are furtherly improved in comparison with two other digital transmission scenarios.
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Books on the topic "Next Generation Optical Access network"

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Ansari, Nirwan. Media Access Control and Resource Allocation: For Next Generation Passive Optical Networks. New York, NY: Springer New York, 2013.

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Next-generation network services. Indianapolis, Ind: Cisco, 2005.

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Wood, Robert. Next-generation network services. Indianapolis, Ind: Cisco Press, 2006.

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Bianco, Andrea, and Fabio Neri, eds. Next Generation Optical Network Design and Modelling. New York, NY: Springer US, 2003. http://dx.doi.org/10.1007/978-0-387-35670-9.

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Chan, Calvin C. K. Optical performance monitoring: Advanced techniques for next-generation photonic networks. Burlington, MA: Academic Press/Elsevier, 2010.

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Optical performance monitoring: Advanced techniques for next-generation photonic networks. Amsterdam: Academic Press, 2010.

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International Working Conference on Optical Network Design and Modelling (6th 2002 Turin, Italy). Next generation optical network design and modelling: IFIP TC6/WG6.10 sixth Working Conference on Optical Network Design and Modelling (ONDM 2002), February 4-6, 2002, Torino, Italy. Boston: Kluwer Academic Publishers, 2003.

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Venkataraman, Hrishikesh. Cognitive Radio and its Application for Next Generation Cellular and Wireless Networks. Dordrecht: Springer Netherlands, 2012.

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Next Generation Intelligent Optical Networks: From Access to Backbone. Springer, 2007.

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Ansari, Nirwan, and Jingjing Zhang. Media Access Control and Resource Allocation: For Next Generation Passive Optical Networks. Springer, 2013.

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Book chapters on the topic "Next Generation Optical Access network"

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Bock, Carlos, Jose A. Lazaro, Victor Polo, Josep Prat, and Josep Segarra. "Metro-Access Convergence." In Next-Generation FTTH Passive Optical Networks, 147–68. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8470-6_7.

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Bock, Carlos, Philippe Chanclou, Jorge M. Finochietto, Gerald Franzl, Marek Hajduczenia, Ton Koonen, Paulo P. Monteiro, Fabio Neri, Josep Prat, and Henrique J. A. da Silva. "Architecture of Future Access Networks." In Next-Generation FTTH Passive Optical Networks, 5–46. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8470-6_2.

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Arellano, Cristina, Carlos Bock, Karin Ennser, Jose A. Lazaro, Victor Polo, Bernhard Schrenk, and Stefano Taccheo. "Components for Future Access Networks." In Next-Generation FTTH Passive Optical Networks, 47–63. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8470-6_3.

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Bengi, Kemal. "An Analytical Model for a Slotted WDM Metro Ring with A-Posteriori Access." In Next Generation Optical Network Design and Modelling, 17–34. New York, NY: Springer US, 2003. http://dx.doi.org/10.1007/978-0-387-35670-9_2.

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Salvador, Marcos Rogério, Sonia Heemstra de Groot, and Diptish Dey. "A Preemptable Slotted Access Protocol to Transport Variable Size Packets in All-Optical Ring Lans/Mans." In Next Generation Optical Network Design and Modelling, 35–49. New York, NY: Springer US, 2003. http://dx.doi.org/10.1007/978-0-387-35670-9_3.

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Alpusig-Endara, Estefany, and Germán Arévalo. "Performance Analysis of Protected Next-Generation Optical Access Networks." In Communication, Smart Technologies and Innovation for Society, 581–89. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4126-8_52.

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Wong, M. A., N. Zulkifli, S. M. Idrus, and M. Elshaikh. "Evaluation Method of MANET over Next Generation Optical Wireless Access Network." In Lecture Notes in Electrical Engineering, 93–101. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46578-3_12.

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Cristea, Mihai-Lucian, Leon Gommans, Li Xu, and Herbert Bos. "The Token Based Switch: Per-Packet Access Authorisation to Optical Shortcuts." In NETWORKING 2007. Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet, 945–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-72606-7_81.

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Varoutas, Dimitris, Thomas Kamalakis, Dimitris Katsianis, Thomas Sphicopoulos, and Thomas Monath. "Importance of the Maturity of Photonic Component Industry on the Business Prospects of Optical Access Networks: A Techno-Economic Analysis." In NETWORKING 2007. Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet, 935–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-72606-7_80.

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Chen, Jiajia, Miroslaw Kantor, Krzysztof Wajda, and Lena Wosinska. "Network Protection." In Next-Generation FTTH Passive Optical Networks, 111–24. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8470-6_5.

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Conference papers on the topic "Next Generation Optical Access network"

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Hiroshi Onaka. "Next generation optical access/core network." In 2008 International Conference on Photonics in Switching (PS). IEEE, 2008. http://dx.doi.org/10.1109/ps.2008.4804241.

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Heron, Ronald. "Next Generation Optical Access Networks." In Access Networks and In-house Communications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/anic.2011.ama2.

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Lee, Chang-Hee, Sang-Mook Lee, Ki-Man Choi, Jung-Hyung Moon, Sil-Gu Mun, Kun-Youl Park, Jin-Serk Baik, Ju-Hee Park, Min-Hwan Kim, and Hoon-Keun Lee. "WDM-PON: a next-generation access network." In Asia-Pacific Optical Communications, edited by Chang Soo Park, Shizhong Xie, Curtis R. Menyuk, and Ken-ichi Kitayama. SPIE, 2006. http://dx.doi.org/10.1117/12.691817.

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Mas Machuca, Carmen, and Wolfgang Kellerer. "Planning methodology towards next generation optical access networks." In 2014 16th International Telecommunications Network Strategy and Planning Symposium (Networks). IEEE, 2014. http://dx.doi.org/10.1109/netwks.2014.6959233.

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Kazovsky, Leonid G., Shing-Wa Wong, She-Hwa Yen, and Shinji Yamashita. "Next-Generation Optical Access Networks." In Frontiers in Optics. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/fio.2009.ftuc1.

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Gutierrez, David, Wei-Tao Shaw, Fu-Tai An, Yu-Li Hsueh, Matthew Rogge, Gordon Wong, Leonid G. Kazovsky, and Kyeong Soo Kim. "Next Generation Optical Access Networks." In 2006 3rd International Conference on Broadband Communications, Networks and Systems. IEEE, 2006. http://dx.doi.org/10.1109/broadnets.2006.4374334.

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Forzati, Marco, and Anders Gavler. "Flexible next-generation optical access." In 2013 15th International Conference on Transparent Optical Networks (ICTON). IEEE, 2013. http://dx.doi.org/10.1109/icton.2013.6602912.

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Wang, Xu, Naoya Wada, T. Miyazaki, G. Cincotti, and Ken-ichi Kitayama. "Hybrid WDM/OCDMA for next generation access network." In Asia-Pacific Optical Communications, edited by Dominique Chiaroni, Wanyi Gu, Ken-ichi Kitayama, and Chang-Soo Park. SPIE, 2007. http://dx.doi.org/10.1117/12.745673.

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Lazaro, J. A., V. Polo, B. Schrenk, F. Bonada, I. Cano, E. T. Lopez, C. Kazmierski, et al. "Optical Subsystems for Next Generation Access Networks." In Access Networks and In-house Communications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/anic.2011.amd4.

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Weis, Erik, Dirk Breuer, and Christoph Lange. "Technologies for next generation optical access." In 2012 14th International Conference on Transparent Optical Networks (ICTON). IEEE, 2012. http://dx.doi.org/10.1109/icton.2012.6254485.

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Reports on the topic "Next Generation Optical Access network"

1

Mitton, D., and M. Beadles. Network Access Server Requirements Next Generation (NASREQNG) NAS Model. RFC Editor, July 2000. http://dx.doi.org/10.17487/rfc2881.

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