The MPLS WG Archive

["Hull, Kenneth A." <KHULL@alleghenyenergy.com>]

	This reference is great for all the ways delay lines are being used.

	A question for Yang @ Lucent.:  Is the MEMs technology based on
slotted network design?


	See the article "Advances in Photonic Packet Switching: An Overview"
(S.
	Yao, B. Mukherjee, S. Dixit) in the February 2000 issue of IEEE
	Communications Magazine, for an overview of some approaches to
optical
	buffering techniques.

	David

	-----Original Message-----
	From: Yang Cao [mailto:yangcao@lucent.com]
	Sent: Thursday, May 25, 2000 10:53 AM
	To: Hull, Kenneth A.
	Cc: 'Dmitri Krioukov'; Krishna Bala; Yakov Rekhter; Stewart Pu;
	mpls@UU.NET
	Subject: Re: Lambda Switching



	I think that's only because a smarter and really practical solution
	has not come up yet.

	Yang

	"Hull, Kenneth A." wrote:
	> 
	> I believe that true optical buffering without O-E-O conversion
would have
	to
	> accomplished via an optical delay line (ie. a pre-determined
length of
	> fiber).
	> 
	> Ken
	>         -----Original Message-----
	>         From:   Dmitri Krioukov [SMTP:dima@krioukov.net]
	>         Sent:   Wednesday, May 24, 2000 9:15 PM
	>         To:     Krishna Bala; Yakov Rekhter; Stewart Pu
	>         Cc:     mpls@UU.NET
	>         Subject:        RE: Lambda Switching
	> 
	>         i have a question on optical buffering --
	>         what are the available technologies here
	>         or links/references to them? (to be more
	>         precise: are they just pools of fiber
	>         or specially designed mirror boxes, etc.)
	> 
	>         thanks,
	>         --
	>         dima.
	> 
	>         > -----Original Message-----
	>         > From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On
Behalf Of
	> Krishna
	>         > Bala
	>         > Sent: Wednesday, May 24, 2000 5:50 PM
	>         > To: Yakov Rekhter; Stewart Pu
	>         > Cc: mpls@UU.NET
	>         > Subject: RE: Lambda Switching
	>         >
	>         >
	>         > Stewart,
	>         > If you define Optical Switching as the ability to switch
large
	> pipes in a
	>         > circuit switched fashion .... yes, this is the core
competence
	of
	> optics.
	>         >
	>         > If you define Optical Routing as the ability to switch
	individual
	> packets
	>         > in a packet switched manner .... no, this is not the
strength of
	>         > optics. The
	>         > biggest barrier to entry for optics here is the
inability of
	> optics to
	>         > perform
	>         > buffering. Large spools of fiber are used as "delay
lines" to
	> emulate
	>         > buffering.
	>         >
	>         >
	>         > Krishna Bala
	>         > Tellium
	>         >
	>         > > -----Original Message-----
	>         > > From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On
Behalf Of
	> Yakov
	>         > > Rekhter
	>         > > Sent: Wednesday, May 24, 2000 1:06 PM
	>         > > To: Stewart Pu
	>         > > Cc: mpls@UU.NET
	>         > > Subject: Re: Lambda Switching
	>         > >
	>         > >
	>         > > Stewart,
	>         > >
	>         > > > I have a question about MPLS. Is it possible for
MPLS using
	>         > > lambda as the
	>         > > > label? I mean, if DWDM technology can provide enough
	available
	>         > > lambda, can
	>         > > > MPLS use lambda as the label?
	>         > >
	>         > > Yes. See draft-awduche-mpls-te-optical-01.txt.
	>         > >
	>         > > > If yes, can we say ' We can achieve optical
switching or
	>         > > optical routing.'?
	>         > >
	>         > > It depends on how you define "optical switching or
optical
	> routing".
	>         > >
	>         > > > But I ever heard that it is impossible to achieve
optical
	> routing,
	>         > > > is it right?
	>         > >
	>         > > I guess folks who told you so may reconsider their
opinion :-)
	>         > >
	>         > > Yakov.
	>         > >
	>         > >