Re: Comments on draft-ietf-gsmp-reqs-03

I agree.

Satoru

> The document covers all transport layers including the photonic one that is
> the subject of section 6.10. Multiplexing is covered in section 6.3.2.5
> which states that "Since optical switches may support multiple transport
> network layers, ...".  This recognizes that there are switches that
> simultaneously support multiple (G.805) layers.  The transmission referred
> to in 6.10 is architecturally similar to a SONET switch that can handle both
> VT1.5 and STS-1s.
> 
> The switching function itself is the subnetwork connection (in G.805, the
> "SNC").  For path termination, I think GSMP already covers this.  For
> example in an ATM switch this would be the ingress or egress of a VCC.  GSMP
> commands to do this for the ingress case is an add-branch with just the
> output port defined.  For the egress case, only the input port is defined.
> 
> So, I'm not sure what additional requirements are needed for photonic
> switches that are not already covered.  Perhaps this section could be
> reworked as an example of how GSMP applies to a particular layer switch.
> 
> 
> -----Original Message-----
> From: Satoru OKAMOTO [mailto:[email protected]] 
> Sent: Wednesday, October 16, 2002 04:04
> To: Shew, Stephen [SKY:QW33:EXCH]
> Cc: [email protected]; [email protected]
> Subject: Re: [GSMP] Comments on draft-ietf-gsmp-reqs-03
> 
> 
> 
> > 2. Section 6.10.  This whole section seems to be unnecessary given 
> > that the whole document is addressing the requirements for GSMP to 
> > support optical and TDM switches.  Further, the diagram is not really 
> > that general because it illustrates only one (G.805) layer.  I think 
> > that this section is trying to address specifically the photonic 
> > layer.  This is fine but is covered throughout the document with 
> > description of general layer support.
> 
> The main purpose of this section is defining what is the optical 
> cross-connect system. 
> If you feel that this section is covered with other sections. Please replace
> 
> this section with the text shown below.
> 
> 6.10 GSMP support for optical cross-connect system
> 
>    The cross-connect system can be consist of not only cross-connect 
>    (/switch) function, but also multiplexing function (including
> transmission 
>    function), path termination function (including client signal termination
>    function). In the optical cross-connect (OXC) system, the multiplexing 
>    function corresponds to the wavelength division multiplexing (WDM). 
>    The optical regenerator and wavelength converter may be necessary in
> order 
>    to realize long-haul transmission and to use effectively the wavelength 
>    resource respectively. The path termination function corresponds to 
>    the optcal channel termination and adaptation function. The GSMP
> controller
>    SHOULD support not only the OXC system which is consist of only
>    cross-connect (/switch) function, but also the OXC system which is
> consist 
>    of cross-connect (/switch) function, multiplexing function (including 
>    transmission function), and/or path termination function (including 
>    client signal termination function).

====================================================
Dr. Satoru Okamoto
Senior Research Engineer
Advanced IP Node Systems Research Group and 
Photonic Networking Research Group
Photonic Transport Network Laboratory
NTT Network Innovation Laboratories
Musashino-Office
  Room 1-2F, 9-11 Midori-Cho 3-Chome
  Musashino-Shi, Tokyo 180-8585 Japan
  Tel: +81-422-59-4353 Fax: +81-422-59-6387
Yokosuka-Office
  Room 807A, 1-1 Hikari-no-oka,
  Yokosuka-shi, Kanagawa 239-0847 Japan
  Tel: +81-468-59-8870  Fax: +81-468-59-3396    
Email: [email protected]
====================================================