Huub,It is true that GMPLS addresses bandwidth management as one of the primary concerns but GMPLS as such thus include information that is aimed at enabling end notes to establish and end-to-end light path. This being the case, the constraints regarding the quality of that path from physical properties perspective is crucial to be taken in consideration. Otherwise we might need to maintain a secondary system just to deal with these effects. So it is justified to start this discussion to see if GMPLS could be extended to also carry that information.
rgds, americo./On Mon, 10 Apr 2006 10:07:46 +0200, Huub van Helvoort <hhelvoort@chello.nl> wrote:
Hello Marco, You wrote:I’m a PhD student on optical network and I’m following the development of the GMPLS work. I had a recent discussion with people working on the optical transport network who where telling me their concern about creating dynamical path over trails including optical amplifiers.They say that cross-talk and gain fluctuation effects may limit the capability of fast allocating new wavelengths over those trials.Cross-talk and gain are physical properties and not related to bandwidth management like GMPLS. IMO the concern is unjustified.I just wanted to know what is your opinion about this and if is there some working group within the IETF already trying to challenge this problem.IMO for the physical properties you should turn to the ITU-T. Cheers, Huub.
-- Americo F. Muchanga Telecommunications Systems Lab (TSLAB/KTH) School of Information and Communication Technology The Royal Institute of Technology KTH Stockholm, Sweden