Showing papers on "10G-PON published in 1993"
29 Nov 1993
TL;DR: It is demonstrated that the VWP scheme can reduce the required number of wavelengths needed for network restoration, and Optical cross-connect node architectures for both schemes are examined and are revealed to be basically identical.
Abstract: Optical path layer technologies will play a key role in the development of the platform on which future bandwidth abandoned B-ISDN should be created. The paper highlights the wavelength path (WP) and the virtual wavelength path (VWP) techniques, both of which can greatly enhance the path layer capability and the efficiency of network failure restoration. The WP and VWP schemes are compared focusing on network restoration performance. It is demonstrated that the VWP scheme can reduce the required number of wavelengths needed for network restoration, Optical cross-connect node architectures for both schemes are then examined. Cross-connect systems which utilise optical regeneration are shown to be effective, and system architectures are revealed to be basically identical. The authors propose two types of cross-connect switch architectures using space division switches and combinations of star-couplers and multi-wavelength selective filters (MWSFs). The hardware requirements are quantitatively evaluated. It is shown that when the port number is larger than 16, the amount of hardware required to support the VWPs ranges from two to three times that required for the WPs. >
52 citations
TL;DR: It was found that by use of a reasonably compact three-dimensional free-space volume, more than 100,000 dispersion-limited communication nodes at a uniform channel spacing of 0.75 nm can be linked with a moderate power distribution loss of 28 dB.
Abstract: A novel optical free-space mesh-connected bus interconnect network architecture is proposed. A mesh-connected bus [IEEE Trans. Comput. C-30, 264-273 (1981)] is known to have the capability of interconnecting, with a three-stage switching, N nodes with a power distribution loss proportional to √N and is therefore advantageous for networking a large number, say over 1000, of communicating ports. Based on conventional space-invariant optical components in a compact and efficient geometry, the proposed optical mesh-connected bus system concept can be used to build either free-space optical interconnect links for parallel processing applications or central switching systems for local or global lightwave communication networks. The proposed architecture lends itself to networking under both the wavelength-division multiple access and other multiple-access environments. In this paper, based on the wavelength-division multiple-access environment, various optical system implementation and performance issues are discused and parameters are analyzed. It was found that by use of a reasonably compact three-dimensional free-space volume, more than 100,000 dispersion-limited communication nodes at a uniform channel spacing of 0.75 nm can be linked with a moderate power distribution loss of 28 dB. Some preliminary optical wavelength-division multiple-access mesh-connected bus experiments based on a 27 × 27 panchromatic optical source array were performed to confirm the operational principle of the proposed concept.
20 citations
TL;DR: A novel algorithm to evaluate the time division multiple access (TDMA) protocol which controls the traffic from the various subscribers towards the shared access equipment (upstream direction) is proposed and it uses counters to estimate the moment of a data packet arrival at the subscriber side.
Abstract: For shared access to a broadband communication network using the asynchronous transfer mode (ATM) a passive optical network (PON) has previously been proposed. A novel algorithm to evaluate the time division multiple access (TDMA) protocol which controls the traffic from the various subscribers towards the shared access equipment (upstream direction) is proposed. It uses counters to estimate the moment of a data packet arrival at the subscriber side. By this ‘look-ahead’ technique no extra upstream channels are needed to initiate the polling by the subscriber. The algorithm guarantees fair access for all subscribers and minimizes the necessary overhead. Both the maximum access delay and overhead may be readily calculated, and the obtained results were supported by numerical simulation. Applicability in the standard broadband network environment has been proved by hardware design simulation.
15 citations
27 Sep 1993
TL;DR: By employing ATM technologies and Multi-CLAD in access networks, very flexible and simple local networks can be achieved even in STM environments and will evolve very smoothly to the future broadband network.
Abstract: This paper describes the "Service Platform" concept as the infrastructure for the local network and its migration scenario in existing situation. By employing ATM technologies and Multi-CLAD in access networks, very flexible and simple local networks can be achieved even in STM (Synchronous Transfer Mode) environments. Moreover, they will evolve very smoothly to the future broadband network.
4 citations
12 Dec 1993
TL;DR: The Stockholm Gigabit Network is a collaborative project where research organizations in the greater Stockholm region operate a network for Gb/s rates that allows experimentation in all areas of communication systems, from optical transmission and switching to full-fledged multimedia applications.
Abstract: The Stockholm Gigabit Network is a collaborative project where research organizations in the greater Stockholm region operate a network for Gb/s rates. The project allows experimentation in all areas of communication systems, from optical transmission and switching to full-fledged multimedia applications. The network is a joint test-bench where not only single system components can be evaluated but also the aggregation of interdependent components. In this article we describe the network and many of the research projects which benefit from the project. >
4 citations
23 May 1993
TL;DR: The application of hybrid copper/fiber architectures within the access network to the provision of broadband services is examined, finding that this structure enables telecommunications operators to provide a broadband service with minimal investment in additional plant, and to best utilize their existing investment in copper.
Abstract: The application of hybrid copper/fiber architectures within the access network to the provision of broadband services is examined. Rather than the two extreme options of either taking fiber all the way to the customer, or entirely retaining the existing copper network, and providing the broadband service over the copper all the way from the exchange, these networks provide something of a median solution. They use fiber from the exchange to either the cabinet or to the distribution point (DP), and then retain the existing copper from that point to the customer's premises. This structure enables telecommunications operators to provide a broadband service with minimal investment in additional plant, and to best utilize their existing investment in copper. >
2 citations
04 Nov 1993
TL;DR: The Broadband Access Facility (BAF) is an affordable method of providing broadband services for the local loop based on the transport of ATM Cells over a shared fiber passive optical network with a passive optical tree and branch topology.
Abstract: The Broadband Access Facility (BAF) is an affordable method of providing broadband services for the local loop. It is based on the transport of ATM Cells over a shared fiber passive optical network (PON) with a passive optical tree and branch topology. The PON supports 622 Mbits/s over 32 network terminations (BAF-NTs) using a passive optical splitter/combiner. The management architecture of the BAF is based on the CCITT Telecommunications Management Network (TMN) recommendations. The management and control requirements have been analyzed using the OSI decomposition into five functional areas: configuration management (controls the `ranging' procedure which compensates for different distances between the BAF-NTs and the BAF-LT); performance management (manages the allocation of bandwidth between the subscribers to provide statistical gain and monitors network parameters to measure how well the BAF MAC protocol provides the agreed service); fault management (set of functions which enables the detection, isolation, correction of abnormal operation); security management (supports encryption cells which is necessary due to their broadcasting to all the BAF-NTs); and finally, accounting functions.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
2 citations
27 Sep 1993
TL;DR: In this paper, the SIEMENS solution with passive optical networks for interactive and broadband distributive services is presented with emphasis on some points of special interest, and an outlook for evolution to an universal access network, allowing new approaches for network optimisation and future features, is given.
Abstract: In the OPAL 93 project the Deutsche Bundespost Telekom (DBPT) installs FITL networks for approximately 200.000 subscribers. The SIEMENS solution with passive optical networks for interactive and broadband distributive services is presented with emphasis on some points of special interest. An outlook for evolution to an universal access network, allowing new approaches for network optimisation and future features, is given.
1 citations
27 Sep 1993
TL;DR: In this article, an overview of the chosen network architecture and the pursued evolution approach, as based on strategic motivations, available technologies and relevant cost profiles, is presented, and the economics of the copper-to-fiber transition is also addressed, and short-mid term deployment steps are outlined.
Abstract: This paper deals with the modernization of the Italian access network and in particular with the introduction of optical technologies into the subscriber loop plant. An overview is presented of the chosen network architecture and the pursued evolution approach, as based on strategic motivations, available technologies and relevant cost profiles. the economics of the copper-to-fiber transition is also addressed, and the short-mid term deployment steps are outlined.
1 citations
29 Nov 1993
TL;DR: A multi-fiber linear lightwave network (M-LLN) for telecommunication networks, where network exchanges are normally connected by multi-Fiber cables, can provide an optically transparent path between network exchanges, hence can avoid congestion bottlenecks at intermediate switches.
Abstract: Linear lightwave networks (LLNs) (Stern, 1990) are optical networks in which network nodes perform "linear" operations only on optical signals: power splitting, combining, and possibly nonregenerative amplification While previous efforts on LLNs assume only one fiber per link, the present authors consider a multi-fiber linear lightwave network (M-LLN) for telecommunication networks, where network exchanges are normally connected by multi-fiber cables An M-LLN can provide an optically transparent path between network exchanges, hence can avoid congestion bottlenecks at intermediate switches More importantly, the network capacity is scalable with the number of available wavelengths as technology progresses To demonstrate the feasibility, they propose a class of linear path allocation schemes (LPAS) for setting up optical paths, and discuss the implementation issues in detail >
15 Nov 1993
TL;DR: The basic technologies and feasibility of multi-Gb/s optical LAN/MANs have been demonstrated and more complex technoligies such as wavelength translation and wavelength routing may be required to build fully scalable MAN/WANs.
Abstract: The basic technologies and feasibility of multi-Gb/s optical LAN/MANs have been demonstrated. Broadcast and select passive star networks with less than 100 users operating at Gb/s data rates are feasible at this time. More complex technoligies such as wavelength translation and wavelength routing may be required to build fully scalable MAN/WANs. >
04 Nov 1993
TL;DR: The standardisation of network structures: Physical Arrangement, Physical Configuration, Physical Implementation or Physical Realisation of a Network.
Abstract: the standardisationof network structures:- level 1 : Generic Reference Configuration (Generic RC)- level2: Specific Reference Configuration (Specific RC)- level 3: Functional Architecture Model (FAM)- level4: Physical Arrangement, Physical Configuration, Physical Implementation orPhysical Realisation of a Network.
27 Sep 1993
TL;DR: A tool has been developed that plans several network architectures so that a cost effective and reliable architecture can be determined for the introduction of fiber in the access network in The Netherlands.
Abstract: The introduction of fiber in the access network in The Netherlands is scheduled for the nearby futu, and preparations for it have already been started. A tool has been developed that plans several network architectures so that a cost effective and reliable architecture can be determined. The tool uses data, existing geographical situations as input.
04 Nov 1993
TL;DR: A software package is described which has been developed to assist in the process of both design and planning associated with passive optical access networks and constitutes a set of basic tools which enable the complete characterization of a number of key technical parameters of opticalAccess networks.
Abstract: A software package is described which has been developed to assist in the process of both design and planning associated with passive optical access networks. The package constitutes a set of basic tools which enable the complete characterization of a number of key technical parameters of optical access networks. The optical networks which can be configured and analyzed using the package are specified visually on a design location and can adopt any topology. Hence a completely general interconnection of nodes and links is permitted. Furthermore an optical access network consisting of several independent networks can also be analyzed. The analytical output of the package consists of a complete spectral power budget specification along any path in the network, the optical return losses on any path, an optical time domain reflectometer (OTDR) display, and the spectral dependence of both the power budget and the return loss.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
07 Sep 1993
TL;DR: In this article, the authors proposed to place photovoltaic panels and batteries in telephone optical network units (ONUs) in the users' vicinity in order to power optoelectronic systems autonomously.
Abstract: With the planned expansion of optical communications to homes and businesses, there arises the need to generate electricity locally because the telephone central office cannot send current over entirely dielectric fiber optics cables. It is proposed to place photovoltaic panels and batteries in telephone optical network units (ONUs) in the users' vicinity in order to power optoelectronic systems autonomously. The development of a software tool which simulates the operation of this system is described.
14 Sep 1993
TL;DR: A procedure to evaluate the normalized bandwidth of interconnection networks for linking M transmitters to N receivers, is derived and shows that bandwidth reduces if the number of stages grows.
Abstract: A procedure to evaluate the normalized bandwidth of interconnection networks for linking M transmitters to N receivers, is derived. Its validity is quite general: it holds for multistage interconnection networks and for generalized shuffle networks. These architectures are particularly suitable for photonic implementations, because, in this case, exchange network with buffering and delay are not easily usable. The networks are assumed to be parallel synchronous. The analysis shows that bandwidth reduces if the number of stages grows. This drawback can be overcome by exploiting the speed of the photonic technologies. >
04 Nov 1993
TL;DR: In this article, the authors discuss the architecture of an ATM-PON system by pointing out its main characteristics, then the main features of the developed ASICs in this environment are presented.
Abstract: Asynchronous transfer mode (ATM) based transmission over passive optical network (PON) is seen as a promising technique for the access network connecting both residential and small business customers. One of the key points for the success of such a proposition is the integration of most of the electrical functions in order to help for a low system cost, a low power consumption, and a good system availability. This paper discusses the architecture of an ATM-PON system by pointing out its main characteristics, then the main features of the developed ASICs in this environment are presented.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
06 Aug 1993
TL;DR: In the optical fiber distributed concentrator (OFDC) as mentioned in this paper, the subscriber line interface is extended to the proximity of remotely located subscribers by extending the local speech and signalling bus of a conventional digital concentrator through a network of remote terminals.
Abstract: In the optical fibre distributed concentrator (OFDC) the subscriber line interface is extended to the proximity of remotely located subscribers. This is achieved by extending the local speech and signalling bus of a conventional digital concentrator through a network of remote terminals. The remote terminals are interconnected in an optical fibre network in a single or double loop configuration. The OFDC was designed to present a transparent interface from the concentrator to these remote terminals. This paper discusses ways of measuring the performance of both the switching and the transmission sections of the OFDC. >
01 Dec 1993
TL;DR: In this paper, a number of optical networks based on the WDM-SCM technique are proposed and the physical realization of such networks are discussed, where it is seen that cost saving as well as increased user numbers can be achieved using technologies easily available today.
Abstract: A number of optical networks based on the WDM-SCM technique are proposed Physical realization of such networks are discussed It is seen that cost saving as well as increased user numbers can be achieved using technologies easily available today Various factors which affect the performance of such a network are also discussed Further study of the performance of such networks under different traffic patterns will be carried out, this will facilitate the design of such networks in the near future >