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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2533 条记录，以下是2171-2180 订阅

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Proceedings of the 1998 conference on all-optical networking: architecture, control, and Management issues

Proceedings of the 1998 Conference on All-Optical Networking...

引用

Proceedings of the 1998 conference on all-optical networking: architecture, control, and Management issues

The proceedings contains 45 papers from the International Society for optical Engineering on all-optical networking: architecture, control, and Management issues. Topics discussed include: network elements and performance modeling;multiplexing strategies;access networks;local area networks;multicast and wavelength routing;wavelength division multiplexing (WDM) networking;network management;optical switching;switched networks;and fault management and resilience.

关键词： Fiber optic networks

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Fault-tolerant routing scheme for all-optical networks

Fault-tolerant routing scheme for all-optical networks

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Bandyopadhyay, S Sengupta, A Jaekel, A Univ Windsor Sch Comp Sci Windsor ON N9B 3P4 Canada

ISBN: (纸本)0819429929

Fault-tolerant routing for WDM routed ah-optical networks has not been studied in details in the literature except for single fault occurrence in a simple topology, like a ring. Conventional routing schemes, being static in nature, are difficult to be modified to handle faults as fault: occurrences need dynamic rerouting. In this paper, we present a fault-tolerant routing scheme for WDM routed all-optical networks. This paper considers modifications to a dynamic routing scheme [14] to handle rerouting in case of fault occurrence. The performance degradations of the network because of fault occurrence are then studied in terms of blocking probability and set-up time through simulations.

关键词： Wavelength division multiplexing optical networks Structured optical fibers Computer science Computer simulations network architectures Signal detection optical communications Reliability Time metrology

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Planar realization of all-optical multi-layer switches by coupled cellular arrays

Planar realization of all-optical multi-layer switches by co...

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Giglmayr, J Heinrich-Hertz-Institut fuer Nachrichtentechnik (Germany)

ISBN: (纸本)0819429929

Planar lightwave circuits (PLCs) of all-optical multi-layer switches are presented, where the cycle structure of the spatial switches is modelled by rearrangeable nonblocking pruned rectangular cellular arrays (PRCAs). The chosen network model is the coupled PRCA (CPRCA). However, refined modelling of the proposed MxN-gon prism switches causes, beside coupling, additionally, the embedding of small PRCAs into larger ones and their intersection. Dependent on the implementation of PLCs of PRCAs (ordinary, reversed and combinations) the (1) moving location (ML) of switches is needed and the (2) multiple use (MU) of directional couplers (DCs) arises, respectively. The PLCs of wide-sense nonblocking dilated multi-layer switches with simple switch setting are also presented.

关键词： directional coupler 3-D all-optical grid switch setting algorithm cellular arrays interactions (coupling, embedding, intersection) of cellular arrays dilated crossbar short-path length network moving location of switches multiple use of couplers

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optical CDMA video transport/switching system

Optical CDMA video transport/switching system

引用

Proceedings of the 1998 conference on all-optical networking: architecture, control, and Management issues

作者： Chan, James K. RDL Culver City United States

optical CDMA offers an alternate solution for video transport/switching to WDMA. optical CDMA potentially provides a large number of virtual optical circuits for video distribution and channel selection. In a video network, it provides asynchronous, multi-rate, multi-channel communication with network scalability, reconfigurability (channel on demand), and network security (provided by inherent CDMA coding). We have demonstrated a video transport/switching system over a distance of 40 Km using discrete optical components in our laboratory. We are currently pursuing Photonic Integrated Circuit (PIC) implementation. In this paper, we will describe the optical CDMA video transport/switching system concept/features, the demonstration system, and the network applications to Hybrid Fiber/Coaxial (HFC), Fiber-To-The-Curb (FTTC) and Fiber-To-The-Home (FTTH).

关键词： optical communication

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Upstream traffic multiplexing in photonic ATM access networks

Upstream traffic multiplexing in photonic ATM access network...

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Girola, G Maier, G Martinelli, M Pattavina, A CoreCom I-20131 Milan Italy

ISBN: (纸本)0819429929

For the future development of residential broadband telecommunication services the present access infrastructure must be upgraded. Fiber-To-The-Rome (FTTH) optical networks, though still expensive today, appear to be a future-proof solution. FTTH networks based on passive optical Remote Nodes (RN) and supporting ATM switching (ATM-PONs) have been demonstrated and are going to be standardized. In these networks the optical hardware in the RN is very simple, but a multiple access protocol is needed for upstream traffic control. In most protocols proposed in literature the control is performed electronically in a centralized way by the Central Office (CO). In this paper we study multiple access schemes for FTTH networks which perform upstream traffic control in a distributed way with the intervention of the user optical network Terminations (ONTs) and of the RN only. We will also consider the case, based on recent research in photonic packet switching, in which the RN is able to perform all-optical ATM-multiplexing. We will employ ONT-RN signalling to make the relatively expensive RN optical buffer co-operate with the electronic buffers located in the ONTs. The different solutions presented will be compared bg simulating the network behavior under various traffic conditions. In conclusion, in this work we evaluate performance advantages achievable in FTTH networks by increasing the optical complexity of the RN and by introducing control schemes which allow a distributed upstream traffic management and, in the case of an RN able to perform all-optical ATM-multiplexing, the co-operation of the RN buffer with the ONT buffers.

关键词： FTTH access networks ATM multiplexing passive optical networks media access control network performance

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Designing an optimum WDM transport network: control architectures, node requirements and performance

Designing an optimum WDM transport network: control architec...

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Nizam, MHM Hunter, DK Andonovic, I Univ Strathclyde Dept Elect & Elect Engn Glasgow G1 1XW Lanark Scotland

ISBN: (纸本)0819429929

This paper describes the development of an optical packet transport network, known as WAvelength Switched Photonic network (WASPNET) - a collaboration between Strathclyde, Essex and Bristol Universities as well as BT, Fujitsu and GPT. One of its main objectives is to reduce packet contention at each node. Normally, this is resolved using node deflection routing or optical delay loops (i.e. the solution is focused at the node design strategy). However in WASPNET, this problem is considered not only as a node design problem but also as a network control and management issue. Although suitable node design can reduce packet loss performance an appropriate network control can reduce the probability of contentions, hence, improve the network throughput and node cost. This suggests that the network management strategy also influences the node design. A possible network control methodology, the SCattered-Wavelength-Path (SCWP), has been identified to support WASPNET implementation. The paper presents some of the comparison studies that were carried out. These include comparing its limitations, control complexity, packet loss performance and buffer requirements against another technique - the SHared-Wavelength-Path (SHWP), It highlights solutions to problems encountered by the SCWP. Although the studies performed were intended for WASPNET transport. system, the findings are invaluable for those involved in WDM network design.

关键词： WDM optical packet transport network contention resolution control methodology sequencing restoration layer wavelength allocation

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Using sub-carrier multiplexing for self-routing of data packets in a high performance system area network

Using sub-carrier multiplexing for self-routing of data pack...

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Saraswat, S Newbridge Networks Corp Kanata ON Canada

ISBN: (纸本)0819429929

In self-routing packet networks, the state of intermediate nodes (switches) is set or reset on the basis of the information present in the packet header. Subcarrier multiplexing (SCM) modulates a number of frequency-separated RF sub-carriers onto a common laser at a single wavelength. SCM has the advantage of high data throughput. It also requires fewer opto-electronic components and avoids walk-off between header and payload due to fiber dispersion. In this paper we describe a novel use of sub-carrier multiplexing for self-routing of data packet within the switching fabric of a high performance system area network. Using SCM data packets are routed optically to the destination without being converted to the electrical domain at the intermediate stages within the network.

关键词： subcarrier multiplexing WDM networks system area networks switching and routing

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all-optical fast packet switched networks: Physical and logical limits of operation

All-optical fast packet switched networks: Physical and logi...

引用

conference on all-optical networking - architecture, control, and Management issues

作者： Chiaroni, D Lavigne, B Barroso, A Hamon, L Jourdan, A Alcatel CIT Alcatel Corp Res Ctr F-91460 Marcoussis France

ISBN: (纸本)0819429929

One of the objectives of the the European ACTS 043 KEOPS project, was to assess the feasibility of a high capacity all-optical packet switching network to face the dramatic increase of traffic needs. The initial objective was to cascade a maximum of 16 network sections (involving transmission links up to 100 lan and one optical packet switching node) at 10 Gbit/s to validate the concept. In this paper we present both the experimental validation and a logical analysis. The physical performance has been assessed through a loop cascade of 40 network sections including 160 Gbit/s throughput switching nodes and 100 lan or transmission. Recent experimental results have shown that such a network could be extended to a world scale. The limits of operation have been checked by regarding interferometric noise influence in the cascade and evolution of power discrepancies through the network. For the first time, these results really indicate that it is possible to provide high capacity, full flexibility and total expandability at the network level without any opto-electronic conversion. Finally, we will give simulation results exhibiting the packet loss rate, the packet delay and the occupation rate in the buffer. In particular, we demonstrate that the packet loss rate was preserved during the cascade. Results are compatible with ATM constraints as well as with other data transmission formats. This set of results demonstrates the feasibility of an all-optical packet switched network while providing both high quality of signal and high traffic performance.

关键词： optical packet switching network cascading bit error rate packet loss rate

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WDM interconnection network for traffic with group locality

WDM interconnection network for traffic with group locality

引用

Proceedings of the 1998 conference on all-optical networking: architecture, control, and Management issues

作者： Bartos, Radim de la Torre, Pilar Univ of New Hampshire Durham United States

Designing optical communication networks that support large numbers of processors, while maintaining acceptable performance under traffic patterns relevant to parallel-distributed computing, remains an open problem in optical networks research. Central obstacles to its solution appears to hinge on the inadequacy of the standard design methods to overcome the current limitations on the number of available wavelength channels per fiber and the cost and the technologically difficulty of fully-optical switching of wavelength channels. This paper proposes a WDM optical network architecture design within the limits of current technology. The design goals are to support a large number of nodes and to parametrically configure the network to perform with acceptable packet loss under a variety of offered traffic patterns consistent with communication primitives often used in parallel-distributed computing. Scalability problems due to the limitations of multiplexing in a single dimension (e.g., space, time, and wavelength) are alleviated by an orchestration of the communication traffic according to three design strategies: multidimensional space-time-wavelength multiplexing, spatial reuse of wavelengths, and parametrically driven network reconfiguration as collection groups each made up of processor-clusters where the number of processors per cluster is limited by the number of available wavelengths. The design does not require tunable components nor wavelength sensitive switching. A group-localized traffic model is proposed as a motivation for network design and used for its experimental evaluation.

关键词： optical communication

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all-optical encoders and decoders for spectral CDMA using bipolar codes

All-optical encoders and decoders for spectral CDMA using bi...

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Proceedings of the 1998 conference on all-optical networking: architecture, control, and Management issues

作者： Dennis, Tasshi Young, James F. Rice Univ Houston United States

We report both experimental and theoretical results for a physical implementation of a bipolar encoding scheme suitable for fiber optic networks. The power spectrum of an erbium-doped superfluorescent fiber source is encoded, the bipolar correlations of the codes are verified and rejection of multiple-access interference is demonstrated in a fiber-based testbed. Simulations of the correlation process identify key optical parameters and physical characteristics important to the design of future systems.

关键词： optical communication equipment

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