Transcript Richard Cardwell

IP/WDM Development
Prepared For:
GLOBCOM’99
An SAIC Company
Telcordia Contact:
Richard Cardwell
732-758-2993
December 6,1999
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
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Long Distance IP/WDM Networks
OC3
OC12
OC48
OC48
SONET
MUX
SONET
MUX
10 Gb/s line rate
10 Gb/s line rate
WDM
WDM
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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
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Metropolitan IP/WDM
OC3
DS3
SONET
MUX
2.4 Gb/s line rate
OC3
DS3
WDM
MUX
40 Wavelengths
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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
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