Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!uunet!motcid!reilly
From: reilly@motcid.UUCP (Patrick L. Reilly)
Newsgroups: comp.protocols.iso
Subject: Re: Simulation of OSI layers
Message-ID: <4523@gypsum.UUCP>
Date: 30 Aug 90 13:23:44 GMT
References: <5609@abaa.UUCP>
Reply-To: motcid!reillyp@uunet.uu.net
Organization: Motorola Inc., Cellular Infrastructure Div., Arlington Heights, IL
Lines: 22

korsberg@abaa.uucp (Ed Korsberg) writes:

:Has there been much work done on simulations of the upper layers for an
:OSI "stack"?  There are many papers written on the simulation analysis
:of the MAC and physical layers (layers 1,2) however I have not seen much
:in the line of the network, transport, session, presentation, and 
:application layers.  
:Are SLAM, GPSS, SIMSCRIPT outdated, old technology?

Having used ALL of the languages above, my preference is for
SIMSCRIPT II.5 for most modeling tasks. However, to get at the
protocol modeling level you might prefer a graphical interface.
The best, in my opinion, is SES/Workbench. Used to be known as
PAWS, but has a new object-oriented flavor (something you need to
model protocols where different stacks will be inherited).

Both products are available as a trial demo, too. But be prepared
to spend some bucks (in excess of $20K) if you opt to purchase.
Are they worth the price tag? You betcha!!

SES/Workbench: Austin, TX +1-512-474-4526
SIMSCRIPT II.5: La Jolla, CA +1-619-457-9681