IK2211_OptNetwModule_2010 (1)

IK2211_OptNetwModule_2010 (1) - IK2211 Data Links and LANs...

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IK2211 Data Links and LANs Optical Networks module Lena Wosinska wosinska@kth.se The Royal Institute of Technology (KTH), School of Information and Communication Technology (ICT) Next Generation Optical NETworks (NEGONET) http://www.ict.kth.se/MAP/FMI/Negonet/
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Lena Wosinska 2 Outline Introduction Development of optical networks Telecom market evolution Overview of broadband access technologies Evolution of fiber access networks Passive Optical Network (PON) Current generation PON Next generation PON: short term and long term development Reliability performance vs. cost tradeoff in PON. PON protection schemes Conclusions
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Lena Wosinska 3 Development of optical networks What Is An Optical Network? It is NOT NECESSARILY all optical packet switched Characteristics of an optical network Transmission: optical Switching: could be optical , could be electronic , could be hybrid could be circuit , could be packet , could be burst First-generation optical networks Transmission in the optical domain (to provide capacity) Example: SONET network (Synchronous Optical Network) Second-generation optical networks More functionality in the optical domain (optical networking) Circuit Switched Optical Networks (wavelength routed networks) Some of routing, switching and intelligence is moving into the optical layer Third-generation optical networks (?)
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Lena Wosinska 4 Internet Model Most widely used WAN technology IP: the network protocol that is designed to operate above a variety of data link layer (network access) protocols
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Lena Wosinska 5 Multiple protocol stacks SONET network ATM network IP router IP router ATM switch SONET cross-connect
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Lena Wosinska 6 Photonics in switching Optical circuit switching (OCS) Wavelength-routed networks Relatively mature technology today Providing lightpaths A lightpath corresponds to a circuit Set-up a lightpath The whole lightpath is available during the connection Disconnect WDM network elements: OLT, OADM, OXC Optical packet switching (OPS) Not available today due to some technological problems Controllable optical memory for optical buffering, control functions in the optical domain, synchronization, etc Optical burst switching (OBS) Hybrid packet switching: a feasible solution?
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Lena Wosinska 7 Optical Networking (OCS) Circuit switched optical networks Lightpath Optical connection Transparent Routed Spans multiple links One wavelength channel on each link Wavelength conversion Transparency
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8 The optical layer The optical layer provides lightpath service to it’s client layers. Lightpath: optical connection
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This note was uploaded on 02/16/2011 for the course ICT 3 taught by Professor 3 during the Spring '11 term at Kungliga Tekniska högskolan.

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IK2211_OptNetwModule_2010 (1) - IK2211 Data Links and LANs...

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