A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the IP over Optical Working Group of the IETF.
Title : Impairments And Other Constraints On Optical Layer
Routing
Author(s) : J. Strand, A. Chiu
Filename : draft-ietf-ipo-impairments-03.txt
Pages : 27
Date : 2002-9-27
Optical networking poses a number challenges for GMPLS. Optical
technology is fundamentally an analog rather than digital technology;
and the optical layer is lowest in the transport hierarchy and hence
has an intimate relationship with the physical geography of the
network. This contribution surveys some of the aspects of optical
networks which impact routing and identifies possible GMPLS responses
for each: (1) Constraints arising from the design of new software
controllable network elements, (2) Constraints in a single all-
optical domain without wavelength conversion, (3) Complications
arising in more complex networks incorporating both all-optical and
opaque architectures, and (4) Impacts of diversity constraints.
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