Showing papers on "10G-PON published in 2007"
TL;DR: The reasons why the PON as a general architecture is so important are reviewed, and the technologies used to implement this architecture are outlined, including the G- and E-PON systems being deployed today.
Abstract: Passive optical networks are the most important class of fiber access systems in the world today. This article first reviews the reasons why the PON as a general architecture is so important. We then outline in some depth the technologies used to implement this architecture, including the G-PON and E-PON systems being deployed today, and the advanced PON systems that provide the evolution path to ever higher bandwidths
208 citations
TL;DR: An integrated-routing algorithm is proposed to achieve load balancing on this hybrid architecture of reconfigurable optical backhaul and wireless mesh networks that provides graceful scalability, cost effectiveness, and bandwidth efficiency.
Abstract: We propose a hybrid optical-wireless access network that consists of reconfigurable optical backhaul and wireless mesh networks (WMNs). The complementary characteristics of wireless and optical networks are combined to provide a broadband and ubiquitous last-mile connection. Wireless mesh routers are deployed to penetrate the vicinity of end users for a flexible and ubiquitous connection. It eliminates massive and geographically scattered deployment of physical infrastructure to reach the end users. The broadband optical backhaul consists of optical ring and multiple tree networks, connecting the central hub and WMNs. The ends of the optical tree networks connect to the wireless gateway routers of WMNs. A hybrid time-division-multiplexing (TDM)/wavelength-division-multiplexing (WDM) optical backhaul is realized by wavelength-multiplexing multiple TDM-passive-optical-network streams. This hybrid architecture provides graceful scalability, cost effectiveness, and bandwidth efficiency. To adapt to a change of the overall demand in different districts, reconfigurability is implemented in the optical backhaul utilizing tunable optical transceivers. An experimental test bed is implemented to evaluate the reconfigurable scheme. Given the synergy of the optical backhaul and WMNs, we propose an integrated-routing algorithm to achieve load balancing on this hybrid architecture. The simulation using NS2 shows an approximately 25% throughput improvement with load balancing.
125 citations
25 Mar 2007
TL;DR: Simulation results demonstrate that the proposed scheduling scheme is capable of collecting the QoS requirement information throughout the network, and the centralized process facilitates the reduction of network transmission overhead.
Abstract: Hybrid optical wireless networks present the future-proof solution to the currently deployed copper access infrastructure. Purposing to increase the network throughput under the hybrid framework, we propose a scheduling scheme to deliver diverse services by taking the quality of service (QoS) requirement into consideration. Simulation results demonstrate that our scheme is capable of collecting the QoS requirement information throughout the network, and the centralized process facilitates the reduction of network transmission overhead.
50 citations
04 Dec 2007
TL;DR: The prospects of state-of-the art Free Space Optical technology, as a last mile solution, combined with Millimeter Wave systems aiming at increasing both the link range and service availability while providing reliable broadband connections at distances above 1 Km are reviewed.
Abstract: As the backbone and the metropolitan area network technologies can increasingly provide unprecedented bandwidth capacities, the focus is being gradually shifted toward broadband access technologies capable of connecting the customer premises to the local exchange. This paper reviews the prospects of state-of-the art Free Space Optical (FSO) technology, as a last mile solution, combined with Millimeter Wave (MMW) systems aiming at increasing both the link range and service availability while providing reliable broadband connections at distances above 1 Km. An overview of the hybrid FSO/MMW system that has been deployed in Athens, Greece, is provided and a brief introduction to the trials that are to be conducted is given.
47 citations
TL;DR: In this article, a highly scalable access architecture achieving high density and featuring resiliency, centralized light-generation control, remote amplification, and colorless optical network unit with reflective semiconductor optical amplifier (RSOA) for upstream modulation is presented and experimentally demonstrated.
Abstract: Feature Issue on Passive Optical Network Architectures and TechnologiesA highly scalable access architecture achieving high density and featuring resiliency, centralized light-generation control, remote amplification, and colorless optical network unit with reflective semiconductor optical amplifier (RSOA) for upstream modulation is presented and experimentally demonstrated. It is based on a user-single-fiber completely passive outside plant and provides broadband connections to >1000 users distributed along large distances. It is believed to represent an intermediate step toward metro-access convergence and offers flexible configurations covering high- and low-density population areas.
42 citations
05 Nov 2007
TL;DR: The potential use of radio over fiber techniques is analyzed and discussed in the context of recent large scale optical fiber deployments in Europe for broadband access but as well in thecontext of home or in-building networks to provide very high data rates to the end-users in harmony with expected evolution of broadband connections.
Abstract: The potential use of radio over fiber techniques (RoF) is analyzed and discussed in the context of recent large scale optical fiber deployments in Europe for broadband access but as well in the context of home or in-building networks to provide very high data rates to the end-users in harmony with expected evolution of broadband connections. Main challenges for RoF include the current evolution toward an all IP network, the rapidity with which networks evolve and the lack of standardization work.
34 citations
15 Nov 2007
TL;DR: Experimental results show that the proposed WDM-PON is capable of providing triple play services in the access network.
Abstract: We demonstrate a novel WDM passive optical network (WDM-PON), which delivers data as well as video services to the end users through the employment of subcarrier modulation at the optical line terminal (OLT) and parallel signal detection (PSD) at the optical network unit (ONU). Experimental results show that the proposed WDM-PON is capable of providing triple play services in the access network.
24 citations
Patent•
AT&T1
TL;DR: In this paper, a method and system for upgrading service to an optical network terminal among a plurality of optical network terminals on a passive optical network is proposed to enable bidirectional communications between a central office and the optical network node over dedicated downstream and upstream wavelength channels outside the downstream and downstream wavelength bands associated with the passive optical networks.
Abstract: A method and system for upgrading service to an optical network terminal among a plurality of optical network terminals on a passive optical network. The upgrade enables bidirectional communications between a central office and the optical network terminal over dedicated downstream and upstream wavelength channels outside the downstream and upstream wavelength bands associated with the passive optical network. The optical network terminal to receive upgraded service is disconnected from a passive optical splitter at a remote node serving the optical network terminal, and optically coupled to a port of the multi-port arrayed waveguide grating at the remote node. Wavelength taps are provided at the central office and the remote node to facilitate multiplexing and demultiplexing the dedicated downstream and upstream channels with the downstream and upstream wavelength bands associated with the passive optical network. In this manner, certain users on the passive optical network may receive service upgrades to wavelength specific services without affecting other users who remain on the passive optical network.
24 citations
01 Jan 2007
24 citations
TL;DR: The experimental results show that the proposed scheme using a single self-seeded reflective semiconductor optical amplifier (RSOA) placed in customer premises is capable of supporting high bandwidth data transmission in a PON.
Abstract: A scheme for upstream access and local area networking in passive optical networks (PONs) using a single self-seeded reflective semiconductor optical amplifier (RSOA) placed in customer premises is proposed and experimentally demonstrated. The self-seeding of the RSOA is performed with the use of fiber Bragg gratings placed at the customer premises to obtain two separate wavelength channels for the transmission of upstream access traffic and local area network traffic. The experimental results show that this scheme is capable of supporting high bandwidth data transmission in a PON.
22 citations
TL;DR: This article elaborates on a methodology developed within the Project 1ST NOBEL, for integrating cost functions and other design constraints into the planning of a DWDM network while considering this evolution perspective to a transparent optical network.
Abstract: The manner and exact timing of the evolution of the widely used DWDM infrastructure to a transparent optical network is judged on economic circumstances and network performance. In this context this article elaborates on a methodology developed within the Project 1ST NOBEL, for integrating cost functions and other design constraints into the planning of a DWDM network while considering this evolution perspective to a transparent optical network. This systematic approach builds upon the experience of static network design and is substantiated by specific examples in this article
25 Mar 2007
TL;DR: The first demonstration of an agile WDM-PON architecture compatible with radio-over-fiber system to provide 2.5Gbit/s symmetric data services is presented.
Abstract: We present the first demonstration of an agile WDM-PON architecture compatible with radio-over-fiber system to provide 2.5Gbit/s symmetric data services. Several enabling techniques are employed to increase transmission capacity while keeping low cost.
TL;DR: This article analyzes and explores four architectures for a typical large ISP backbone and proposes an integrated architecture for IP over optical cross-connect networks that may provide an attractive alternative for providing rapid and cost-effective restoration from network failures.
Abstract: IP over optical network architectures have been extensively discussed within the research literature over the past few years. However, although signaling protocols between IP routers and optical cross-connect networks have been standardized, large IP backbones are not typically deployed over optical cross-connect networks with automatic reconfigurability features, such as automatic restoration or dynamic establishment of new IP links. One of the most important criteria in determining whether an IP backbone should be carried over such an optical cross-connect network is economic viability. In this article we analyze and explore four architectures for a typical large ISP backbone. In contrast with some other published claims, our results suggest it is more economically attractive to bypass an intermediate cross-connect network, given current equipment and IP backbone network design requirements. However, for ISPs who also provide a large volume of private line services, we propose an integrated architecture for IP over optical cross-connect networks that may provide an attractive alternative for providing rapid and cost-effective restoration from network failures
TL;DR: In this paper, the authors investigate an Ethernet passive optical network (EPON) architecture accommodating multiple wavelengths for cost-effective and gradual capacity upgrades, and demonstrate the successful implementation of this multi-wavelength PON (MWPON) with dual feeder fiber using a reflective semiconductor optical amplifier (RSOA) at each optical network unit (ONU).
Abstract: We investigate an Ethernet passive optical network (EPON) architecture accommodating multiple wavelengths for cost-effective and gradual capacity upgrades. We demonstrate the successful implementation of this multiwavelength PON (MWPON) architecture with dual feeder fiber using a reflective semiconductor optical amplifier (RSOA) at each optical network unit (ONU). The scalability of this MWPON is limited by the power of feeding light, RSOA operating conditions, temperature variations, and Rayleigh backscattering. We report on the possibility of a 16-user network with 20 km of feeder and 2.0 km of distribution fiber. With temperature controlled ONUs, the MWPON may deliver eight distinct wavelengths for upstream access with 10 Gbits/s aggregate capacity.
Patent•
19 Jan 2007
TL;DR: In this article, a method and system for providing Triple Play services using GE-PON technology on a conventional network system, including coupling VLAN bridging to an optical line termination unit, was proposed.
Abstract: A method and system for providing Triple Play services using GE-PON technology on a conventional network system, including coupling VLAN bridging to an optical line termination unit by dedicating a GE-PON logical link for each one of voice, data and video as inputs and outputs of the optical line termination unit, and coupling VLAN bridging to each optical network terminal by dedicating a GE-PON logical link for each one of voice, data and video as inputs and outputs of each optical network terminal, wherein a signal out of each optical network terminal is routed to a residential gateway that comprises a dedicated GE-PON logical link for each one of voice, data and video.
TL;DR: Simulation results indicate that the proposed OCDMA-PON scheme is feasible and that the novel design can improve the scalability and transmission performance of the optical access networks.
Abstract: In this paper, a novel Passive Optical Network based on Optical Code Division Multiple Access (OCDMA-PON) is presented. The design of the Optical Line Terminator (OLT) and the Optical Network Unit (ONU) for the OCDMA-PON are studied in detail. The proposed OCDMA-PON combines the advantages of PON and OCDMA technology and it can be applied to an optical access network with full services on demand, such as internet protocol, video on demand, tele-presence and high quality audio. Compared to other multiple access technologies, the proposed OCDMA-PON provides more ONU and assembly flexibly for PON. We analyze in detail the scalability and system transmission performance of such a network. Simulation results indicate that the proposed scheme is feasible and that the novel design can improve the scalability and transmission performance of the optical access networks.
25 Mar 2007
TL;DR: In this article, the authors demonstrate optical-layer virtual private networking in a new super-PON architecture using a dynamic wavelength reflector, which enables communications among different PONs.
Abstract: We demonstrate optical-layer virtual private networking in a new super-PON architecture using a dynamic wavelength reflector. The optical VPN enables communications among different PONs.
TL;DR: Gigabit passive optical network (GPON), and broadband PON which preceded it, were produced from the Full Service Access Network (FSAN) group and the International Telecommunication Union — Telecommunication Standardization Sector (ITU-T) standards organization.
Abstract: Gigabit passive optical network (GPON), and broadband PON which preceded it, were produced from the Full Service Access Network (FSAN) group and the International Telecommunication Union — Telecommunication Standardization Sector (ITU-T) standards organization. As it was originally framed in 2002, G-PON was designed to be an inclusive standard, covering the carriage of time-division multiplexing (TDM), data, and video services, using both asynchronous transfer mode (ATM) and packet payloads, at a wide variety of speeds and loss budgets. This wide-scope strategy helped promote quick adoption of G-PON, since it could accommodate pretty much any service and fit into a wide range of network situations. Today, G-PON is a mature fiber access transmission system. As time has passed, G-PON continues to evolve to meet the current needs of network operators. This has largely consisted of narrowing the options left open in the original standards. For example, the data rate of 2.488 Gb/s downstream, 1.244 Gb/s upstream has become the clear favorite, and the “B+” loss budget class of 28 dB is now required by all carriers. This has happened because the demands of IPTV require more bandwidth, and lower speeds and budgets have not proven to save costs significantly. Similarly, the packet transport feature of G-PON, the Gigabit Encapsulation Method (GEM), is highly recommended over the ATM transport scheme. This simplification was enabled by the advances in packet transport of legacy circuit services, which eventually obviated the need for the ATM system. The new streamlined G-PON specifications and requirements have helped promote interoperability between different vendors’ equipment. Through 2006, a series of FSAN-sponsored interoperability events have helped the industry test their equipment against each other, and confirm compliance with the standard. The most recent of these testing events demonstrated interoperability between G-PON equipment provided by 11 participating companies. Currently, G-PON is the subject of many network operator bid-tender pro-
Proceedings Article•
25 Mar 2007TL;DR: Experimental results from the proposed algorithms show significant improvement on the network cost compared to other designs.
Abstract: We study cost-efficient design of reliable Next-Generation Carrier-Grade Ethernet under different link rates and signal-transmission-range constraints. Experimental results from our proposed algorithms show significant improvement on the network cost compared to other designs.
25 Mar 2007
TL;DR: In this article, a novel wavelength shared hybrid passive optical network (WS-HPON) architecture for symmetric gigabit PON capacity upgrades with installed equipment re-use is proposed to bridge the technology gap between gigabit and WDM-PON systems cost effectively.
Abstract: We propose and demonstrate a novel wavelength shared hybrid passive optical network (WS-HPON) architecture for symmetric gigabit PON capacity upgrades with installed equipment re-use, to bridge the technology gap between gigabit- and WDM-PON systems cost- effectively.
24 Jun 2007
TL;DR: This paper overviews the security of the WDM optical network, discusses advanced cryptographic methods that stem from quantum mechanics, known as quantum cryptography, and identifies specific vulnerabilities.
Abstract: Dense wavelength division multiplexing optical networks transport a huge aggregate traffic exceeding Tbps per single fiber, and passive optical network technology has been extended to include the residential and enterprise network layer with fiber-to-the premises. Because this network allows for multimedia and extremely high data rates to end-users, optical communications security is important not only on the client and the node management layers, but also on the physical layer. Thus, cyber-security becomes also important in optical networks, including unbreakable cipher keys, cipher key distribution, identification of malicious actors, source authentication, physical link signature, and countermeasure strategies. In this paper we overview the security of the WDM optical network. We discuss advanced cryptographic methods that stem from quantum mechanics, known as quantum cryptography, and we identify specific vulnerabilities. We also look into the security of the next-generation optical network.
25 Mar 2007
TL;DR: Even as several Asian telcos role out EPON en mass, they and other telcos are grappling with a number of challenges that effect their present and future deployments.
Abstract: Even as several Asian telcos role out EPON en mass, they and other telcos are grappling with a number of challenges that effect their present and future deployments. This paper identifies and examines these challenges.
01 Dec 2007
TL;DR: A review of state-of-the-art developments and advances in wireless and optical communications, presents key technical challenges for providing seamless communications in fiber-wireless (FiWi) access networks, and highlights important research issues for providing intelligence, transport, access, and convergence of these future networks.
Abstract: Traditionally, wireless and optical fiber networks have been designed separately from each other. Wireless networks aimed at meeting specific service requirements while coping with particular transmission impairments and optimizing the utilization of the system resources to ensure cost-effectiveness and satisfaction for the end user. In optical networks, on the other hand, research efforts rather focused on cost reduction, simplicity, and future-proofness against legacy and emerging services and applications by means of optical transparency. With the ultimate goal of providing access to information when needed, wherever needed, and in whatever format it is needed, the vision of technological convergence of wireless and optical networks is not only becoming a necessity but also plays a key role in future communications networks. Towards the technical evolution of wireless-optical access networks and the seamless coexistence of both technologies, this paper provides a review of state-of-the-art developments and advances in wireless and optical communications, presents key technical challenges for providing seamless communications in fiber-wireless (FiWi) access networks, and highlights important research issues for providing intelligence, transport, access, and convergence of these future networks.
Patent•
18 Oct 2007
TL;DR: In this paper, a management method of an optical fiber network system is disclosed, which includes the steps of adopting at least one information string, which is set by an ONU management and control interface (OMCI), by the optical network unit, packing the information string into a management packet; and transmitting the management packet to the user apparatus by the ONU according to an Ethernet protocol.
Abstract: A management method of an optical fiber network system is disclosed. The optical fiber network system includes at least one user apparatus and an optical network unit (ONU), and the ONU is connected with the user apparatus. The management method includes the steps of: adopting at least one information string, which is set by an ONU management and control interface (OMCI), by the optical network unit; packing the information string into a management packet; and transmitting the management packet to the user apparatus by the optical network unit according to an Ethernet protocol.
Patent•
30 Jul 2007
TL;DR: In this article, the authors proposed a network card based on passive optical network, which utilizes the technology of passive optical networks when accessing to an upper layer server, lengthening the access distance, and reducing the structure complexity and cost of FTTD.
Abstract: The present invention relates to a computer Ethernet card used for a passive optical fiber access network and its data transmission terminals. A hardware network system that is based on a PON system optical network unit and is coupled to a computer via PCI interfaces is disposed. The hardware network system includes an optical network unit and its peripheral circuits, an end of which is coupled to an access optical fiber via an optical fiber transceiver, and the other end of which is coupled to computer PCI interfaces via a giga-Ethernet MAC controller. The present invention provides a network card based on passive optical network, which utilizes the technology of passive optical network when accessing to an upper layer server, lengthens the access distance, and reduces the structure complexity and cost of FTTD. The present invention allows tighter combination between the computer and the optical network, not only have the features of high bandwidth and low interference, but also have the advantages of simplified system, compact structure, easy installation and maintenance, and low price.
25 Mar 2007
TL;DR: A new access network scheme introducing WDM based flexibility, with dynamic rearrangement of customer connections, is proposed with focus on physical layer issues, simulation and experimental results are provided.
Abstract: We propose a new access network scheme introducing WDM based flexibility, with dynamic rearrangement of customer connections. We focus on physical layer issues, simulation and experimental results are provided for a network without optical amplification.
TL;DR: Varying quality of service and resiliency requirements for these services are being reflected in a new breed of converged Ethernet and optical network elements with capabilities to interwork the bearer-planes of these two networking technologies seamlessly.
Abstract: With the growing interest on wireline network architectures for residential triple-play and business Ethernet services there is a renewed demand for efficient and reliable packet-based transport capabilities between the content providers and the end users. Voice and data traffic carried over a variety of access technologies is collected via technology-specific access networks (e.g., digital subscriber line [xDSL], passive optical network [xPON], and wireless fidelity [WiFi]). Metro and core networks need to aggregate the various user flows from different access network nodes and provide scalable and cost-effective distribution of various flow types (e.g., Internet access, voice, video on demand, and broadcast TV services) to the relevant service access points. Varying quality of service and resiliency requirements for these services are being reflected in a new breed of converged Ethernet and optical network elements with capabilities to interwork the bearer-planes of these two networking technologies seamlessly. Network elements based on Ethernet/Optical converged technology are able to select the most fitting mechanisms from each networking technology to meet the transport requirements for each individual service demand better while providing significantly enhanced implementation and operational efficiencies. This paper discusses network architecture models and network elements addressing these goals. © 2007 Alcatel-Lucent.
TL;DR: The paper presents techno-economic results for fixed access networks which have been achieved within the IST MUSE (Multi Service Access Everywhere) integrated project in the first phase and summarises the results from studies of two major use cases, Network Migration Cases and the Native Ethernet approach.
Abstract: The paper presents techno-economic results for fixed access networks which have been achieved within the IST MUSE (Multi Service Access Everywhere; http://www.ist-muse.org ) integrated project in the first phase. The article summarises the results from studies of two major use cases, Network Migration Cases and the Native Ethernet approach. The results are based on a common framework. A specific attention is paid to the first mile deployment scenarios including Fibre to the Cabinet (FTTCab) and Point-to-Point optical networks (PtP). It has been observed that the migration from a best effort access network to a Quality of Service (QoS) enabled multi-service architecture based on Ethernet or IP forwarding is favourable in comparison with an ATM-based evolution scenario. Service enabling new network functionalities like Quality of Service (QoS), multicast and Internet (IP) based auto-configurations are moving closer to subscribers. This leads to an increased intelligence in access networks and related potential Capital Expenditures (CAPEX) savings of about 25% in aggregation networks.
25 Mar 2007
TL;DR: This paper reviews advanced key technologies for high-speed PON systems beyond 1 Gb/s and describes the current state of the art in these technologies.
Abstract: The demand for high bandwidth access has spurred the development of high-speed passive optical networks (PONs) with their cost-effective user-shared system infrastructure. This paper reviews advanced key technologies for high-speed PON systems beyond 1 Gb/s.