Optical Transport Network

About: Optical Transport Network is a research topic. Over the lifetime, 6055 publications have been published within this topic receiving 85783 citations.

Method and apparatus for implementing and networking a semiconductor-based optical burst switching module within optical networks

Abstract: An intelligent optical burst switching module for use in an optical switching network includes an optical receiver array, optical transmitter array, a core switch unit and a control unit. The core switch unit routes optical control and data signals received via a plurality of optical input lines to the optical receiver array and a plurality of output lines, respectively. The optical output lines provide propagation paths for a plurality of TDM channels. The optical receiver array converts the optical control signal to an electrical signal. The control unit processes the converted control signal and, responsive thereto, causes the core switch unit to route at least a portion of the data signal to one of the TDM channels. The control unit also causes the optical transmitter to generate a new optical control signal and cause the switch unit to route the new control signal to another of the TDM channels.

Optical wavelength cross connect architectures using wavelength routing elements

Abstract: An optical wavelength cross connect is provided to receive multiple input optical signals that each have multiple spectral bands and to transmit multiple output optical signals that each have one or more of those spectral bands. The optical wavelength cross connect includes multiple wavelength routing elements, which are optical components that selectively route wavelength components between one optical signal and multiple optical signals in either direction according to a configurable state. As used within the optical wavelength cross connect, each of the wavelength routing elements receives at least one optical signal corresponding to one of the input optical signals. A mapping of the spectral bands to the output optical signals is determined by the states of the wavelength routing elements.

Next Generation SONET/SDH: Voice and Data

Abstract: Preface.Introduction.1 Synchronous Hierarchical Networks.1.1 Introduction.1.2 Switching Hierarchy.1.3 Digital Subscriber Lines.1.3.1 2B1Q.1.3.2 DMT.1.3.3 CAP.References.2 Synchronous Optical Networks SONET/SDH.2.1 Introduction.2.2 SONET Frames.2.3 Virtual Tributaries.2.4 STS-N Frames.2.4.1 Concatenation and Super Rates.2.4.2 Scrambling.2.4.3 Mapping by Layer.2.5 Maintenance.2.6 Summary.References.3 Asynchronous Data/Packet Networks.3.1 Introduction.3.2 Data Traffic Concepts.3.2.1 Natural Information Rate.3.2.2 Packet Networks.3.2.3 Timing Aspects.3.3 Review of Data Networks.3.3.1 Ethernet.3.3.2 FDDI.3.3.3 Switched Multi-megabit Data Services.3.3.4 Frame Relay.3.3.5 Internet Protocol.3.3.6 IP Telephony or Voice over IP.3.3.5 FAX over IP.3.4 Point-to-Point Protocol.3.5 8B/10B Block Coding Overview.3.5.1 Example, 3B/4B Block Coding.3.6 Fiber Channel.3.7 ESCON.3.8 FICON.3.9 Gigabit Ethernet.3.10 Resilient Packet Ring.3.11 LAPS.3.12 Ethernet over LAPS over Legacy SONET/SDH.3.13 IP over LAPS over SONET/SDH.3.14 MPLS, MPlambdaS and GMPLS.3.15 XDLC.3.16 ATM.3.16 ATM over SONET/SDH.References.4 The Generic Framing Procedure.4.1 Introduction.4.2 Frame Multiplexing.4.3 Client Payload Multiplexing.4.4 GFP Frame Structure.4.5 Error Control.4.5.1 Header Error Control.4.6 Delineation.4.7 Scrambling.4.7.1 Frame Structure Payload.4.8 Idle GFP Frames and Multiplexing.4.9 GFP Modes.4.9.1 The Frame-Mapped GFP (GFP-F).4.9.2 GFP-F Encapsulation-Examples.4.9.3 The Transparent-Mapped GFP (GFP-T).4.9.4 GFP-F Encapsulation-Examples.4.9.5 GFP-F and GFP-T Comparison.References.5 Next Generation SONET/SDH.5.1 Introduction.5.2 The Next Generation SONET/SDH.5.3 Contiguous Concatenation.5.4 Virtual Concatenation.5.5 LCAS.5.6 Concatenation Efficiency.5.7 Data over Next Generation SONET/SDH.References.6 Next Generation Optical Networks.6.1 Introduction.6.2 Next Generation Optical Rings.6.3 Shared Rings.6.4 Protection.6.5 Network Management.6.6 Bandwidth Management.6.7 Wavelength Management.6.8 Service Restoration.References.7 Other New Optical Networks.7.1 The Optical Transport Network.7.1.1 FEC in OTN.7.1.2 OPU-k.7.1.3 ODU-k.7.1.4 OTU-k.7.1.5 The Optical Channel.7.1.6 Optical Channel Carrier and Optical Channel Group.7.1.7 Nonassociated Overhead.7.1.8 Mapping in OTN.7.1.9 Mapping GFP Frames in OPU-k.7.2 Next Generation SONET/SDH and OTN.7.3 OTN Summary.References.8 NG-S over DWDM, OTN over DWDM, and Experimental Networks.8.1 Introduction.8.2 OTN over DWDM.8.3 Experimental Networks.8.3.1 Ethernet Passive Optical Networks.8.3.2 CDWM E-PON.8.3.2 The Wavelength-Bus.8.3.3 High-Performance Parallel Interface.8.3.4 Other Parallel Optical Buses.8.4 Conclusion.References.Appendix A.Appendix B.Appendix C.Acronynms.Index.

Integrated optical receiver architecture for high speed optical I/O applications

Abstract: An integrated optical receiver architecture may be used to couple light between a multi-mode fiber (MMF) and silicon chip which includes integration of a silicon de-multiplexer and a high-speed Ge photo-detector. The proposed architecture may be used for both parallel and wavelength division multiplexing (WDM) based optical links with a data rate of 25 Gb/s and beyond.

Energy efficiency analysis for dynamic routing in optical transport networks

Abstract: The energy efficiency in telecommunication networks is gaining more relevance as the Internet traffic is growing. The introduction of OFDM and dynamic operation opens new horizons in the operation of optical networks, improving the network flexibility and its efficiency. In this paper, we compare the performance in terms of energy efficiency of a flexible-grid OFDM-based solution with a fixed-grid WDM network in a dynamic scenario with time-varying connections. We highlight the benefits that the bandwidth elasticity and the flexibility of selecting different modulation formats can offer compared to the rigidity of the conventional networks.