Showing papers on "10G-PON published in 1988"
28 Nov 1988
TL;DR: Failure immunization technology for network service survivability (FITNESS) is proposed method to restore fiber networks in a distributed fashion using broadband digital cross-connect systems (B-DCS) in a synchronous optical network (SONET).
Abstract: For optical fiber systems carrying multiple Gb/s, the failure of a key fiber-optic system can result in huge loss of bandwidth. Failure immunization technology for network service survivability (FITNESS) is proposed method to restore fiber networks in a distributed fashion using broadband digital cross-connect systems (B-DCS) in a synchronous optical network (SONET). With intelligent B-DCS cross-connecting at the synchronous transport signal level 1 (STS-1), level, FITNESS unites this distributed intelligence into a single coherent parallel-processing entity to restore the network in under two seconds. Some performance results are obtained through software emulation using a real LATA model are presented. >
155 citations
27 Mar 1988
TL;DR: A class of wavelength-routing optical networks is described on the basis of the interconnection of wavelength multiplexed channels that allow the reuse of wavelengths in different transmission sections and this leads to fewer wavelengths being needed.
Abstract: A class of wavelength-routing optical networks is described on the basis of the interconnection of wavelength multiplexed channels. Unlike previously described optical network structures, these networks allow the reuse of wavelengths in different transmission sections and this leads to fewer wavelengths being needed. A choice of structures using a common set of components leads to the opportunity to design a network according to the geographical distribution of the switching nodes. The structures provide for a set of point-to-point interconnections and, with modest numbers of wavelengths, full interconnection between the optoelectronic nodes is possible at the optical level. In bypassing intermediate electronic stages the networks appear to offer good reliability characteristics. Providing the components in an initial network are designed to utilize bandwidth efficiently, the networks could be upgraded to incorporate more channels, optical switching, and other forms of optical processing at the optical nodes. >
108 citations
TL;DR: The authors contend that optical system developments, which so far have followed a straightforward and logical path from direct link replacement to the proposed transwitching networks, will evolve towards passive (fiber-only) networks that could ultimately see the eradication of the central office.
Abstract: The authors contend that optical system developments, which so far have followed a straightforward and logical path from direct link replacement to the proposed transwitching networks, will evolve towards passive (fiber-only) networks that could ultimately see the eradication of the central office. To explain this view of the future, they briefly trace optical system developments to the present day before citing the technology developments that have led them to the conclusion. They discuss present network and technology trends, focusing on the reduction of the amount of electronic hardware, the disappearance of bandwidth efficiency as an important factor, and the state of the optical network today. They then turn to the future network and technology, showing how the central office can be dispensed with by operating the network on a radio mode, with each terminal assigned a specific frequency. >
34 citations
28 Nov 1988
TL;DR: The authors probe the economics and issues associated with providing fiber access to the residence by examining the cost of the underlying technologies and show that fiber will be cost-competitive for voice during the 1990s and broadband access will become cost-effective during the next 10 to 15 years.
Abstract: The authors probe the economics and issues associated with providing fiber access to the residence by examining the cost of the underlying technologies. They compare the installed first costs of access for voice on copper, voice on fiber with low-speed optoelectronics, and broadband access based on SONET/ATM (synchronous optical network/asynchronous transfer mode) for optimistic, average and conservative cost scenarios. They show that fiber will be cost-competitive for voice during the 1990s and predict that broadband access will become cost-effective during the next 10 to 15 years. The importance of developing voice-on-fiber access approaches that can be evolved to full switched broadband capability is highlighted. >
16 citations
28 Nov 1988
TL;DR: A novel TDM (time-division multiplexing) sampling technique for demultiplexing and selecting digital video channels at the customer end is described, and a 323-channel capability has been demonstrated at 2.2 Gb/s over an experimental optical network.
Abstract: A passive optical local access network for telephony applications is proposed which can evolve a future broadband ISDN (integrated services digital network). A laboratory demonstrator has been constructed which can deliver a 144-kb/s ISDN channel, or the equivalent to 128 customers from a single fiber exchange. Options for evolution to broadband ISDN are discussed with emphasis on choice of multiplexing technique. A novel TDM (time-division multiplexing) sampling technique for demultiplexing and selecting digital video channels at the customer end is described. A 323-channel capability has been demonstrated at 2.2 Gb/s over an experimental optical network. >
15 citations
28 Nov 1988
TL;DR: A case study based on a metropolitan area LATA network shows the new architecture may have the highest network survivability for fiber cable cuts with a significant cost savings compared with the traditional 1:1 diverse protection architecture.
Abstract: Reviews a new survivable fiber-hubbed architecture using optical switches as protection switches. A case study based on a metropolitan area LATA network shows the new architecture may have the highest network survivability for fiber cable cuts (identical to that provided by the 1:1 diverse protection architecture) with a significant cost savings compared with the traditional 1:1 diverse protection architecture. The cost and benefits of using the new scheme, the traditional 1:1/DP or 1:1N/DP are very network dependent, and computer tools are a virtual necessity for alternative evaluation. The decision for which strategy to use depends on local conditions and belong to the OTC's planners who appreciate the requirements of their network for survivability. >
13 citations
28 Nov 1988
TL;DR: Attention is given to optical interconnect, fiber terminal evolution, multipoint configurations, novel services, hybrid networks, enhanced performance, monitoring, and enhanced and integrated OAM.
Abstract: The authors discuss future network architectures and application benefits of SONET networking. Emphasis is placed on networking of existing and potential services, OAM (operations, administration, and maintenance), and SONET, the transport format which permits the realization of such future networks. Attention is given to optical interconnect, fiber terminal evolution, multipoint configurations, novel services, hybrid networks, enhanced performance, monitoring, and enhanced and integrated OAM. >
9 citations
11 Sep 1988
TL;DR: In this article, the authors present a technology and architecture perspective for evolving today's copper access network optimized for POTS (plain old telephone service) to a fiber access network providing both narrowband and broadband services.
Abstract: The authors present a technology and architecture perspective for evolving today's copper access network optimized for POTS (plain old telephone service) to a fiber access network providing both narrowband and broadband services. Architectures are assessed using application studies on actual routes in Bell Canada. Two architectures emerge as serious candidates (i.e., competitive with copper) for providing POTS service in the year 1992: the double star and the star-bus. Tradeoffs between these architectures relating to POTS and broadband upgrade are discussed. >
5 citations
12 Jun 1988
TL;DR: The authors introduce the concepts and techniques on which optical multichannel networking is based, and show how it can be applied in a number of environments to benefit both the network user and operator.
Abstract: A practical approach to high-capacity networking based on wavelength-division multiplexing is described. The authors introduce the concepts and techniques on which optical multichannel networking is based, and show how it can be applied in a number of environments to benefit both the network user and operator. They include details of topology requirements, active node options, and the range of application areas for multichannel networks. For each application the features of optical multichannel networking that are of particular benefit to that area are highlighted. >
3 citations
TL;DR: PON proposals are leading to the design of new telecommunications customer access equipment whose functional requirements are discussed, together with details of the system demonstrators at BTRL.
Abstract: Recent proposals have been made for a passive optical local access network (PON) for telephony and cable TV applications. These are leading to the design of new telecommunications customer access equipment whose functional requirements are discussed, together with details of the system demonstrators at BTRL. Possible sccenarios for network deployment are presented.
1 citations
12 Jun 1988
TL;DR: It is shown how local network restructuring is leading to entirely new forms of DCS technology, as represented by the new Synchronous Optical Network (SONet) standards, which will bring a dynamic architecture to telecommunications networks, enabling bandwidth to be provided on demand, with much improved levels of supervision.
Abstract: A description is given of the function of and technology used in digital cross-connect systems (DCS) and the need for such a capability, which leads to broader aspects of network management. The potential overlap with real-time switching capability is discussed, together with the impact of the introduction of optical-fiber transmission in all parts of the network. It is shown how local network restructuring is leading to entirely new forms of DCS technology, as represented by the new Synchronous Optical Network (SONet) standards, which will bring a dynamic architecture to telecommunications networks, enabling bandwidth to be provided on demand, with much improved levels of supervision. >
11 Sep 1988
16 Nov 1988
TL;DR: In this article, the authors assess system requirements, such as fiber type and operating wavelength, and examine electro-optic device technology for optical fiber equipment interconnections within exchanges, in order to realize network architectures for the optical exchange.
Abstract: In order to realize network architectures for the optical exchange, decisions must be made as to the component technology to be employed. The author assesses system requirements, such as fibre type and operating wavelength and examines electro-optic device technology for optical fibre equipment interconnections within exchanges.
14 Sep 1988
TL;DR: A management scheme fully compatible with open systems interconnection is presented, which shows the increased flexibility of a multichannel integrated network, which is derived from the possibility of reconfiguring the network and of automatically balancing the traffic between different channels.
Abstract: Aspects and functions of an integrated-service multichannel network are analyzed. The interaction between technological constraints and network architecture is discussed. A management scheme fully compatible with open systems interconnection is presented. This scheme shows the increased flexibility of a multichannel integrated network, which is derived from the possibility of reconfiguring the network and of automatically balancing the traffic between different channels. >