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IP/WDM Development - PowerPoint PPT Presentation

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IP/WDM Development

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  1. Prepared For:GLOBCOM’99 Telcordia Contact:Richard Cardwell 732-758-2993 December 6,1999 IP/WDM Development An SAIC Company

  2. Long Distance IP/WDM • Cost of fiber and wavelengths is very high • Majority of network cost is in fiber plant • Electronics is used for multiplexing signals to minimize fiber requirements • Doubtful a network element will have 10 Gb/s demand to a foreign network element • SONET multiplexer will still be used to raise data rate even with IP/WDM • IP/WDM should employ SONET for layer 2 to remain compatible with SONET and enable multiplexing to higher rates • Some equipment may directly interface with WDM, depending on cost

  3. Long Distance IP/WDM Networks WDM OC3 SONET MUX 10 Gb/s line rate OC12 WDM OC48 SONET MUX 10 Gb/s line rate OC48

  4. Metropolitan IP/WDM • Distance are short - on the order of 10-20 km. • Rates between switches are on the order of DS3 or OC3 • SONET commonly used for electrical multiplexing • WDM direct interface is economic at OC12 levels today, OC3 in the future • Many inexpensive wavelengths will relatively low data rates • WDM provides wavelength protection • IP/WDM will still use SONET to remain compatible with existing equipment

  5. OC3 SONET MUX 2.4 Gb/s line rate DS3 Metropolitan IP/WDM WDM MUX OC3 40 Wavelengths DS3

  6. IP/WDM • Use simplified SONET as a framing protocol to remain compatible with existing equipment • WDM protection capability is important to protect against fiber failures