|
I don’t know whether I’ll be able to make the dial-in, but let me comment on the 11-16-0457 presentation.
The problem with the picture on the last slide is not that it is wrong. It’s that it says absolutely nothing, and therefore does not serve a purpose.
If that seems harsh, let me explain what the purpose of the “complex” diagrams.
ISO defines a layering model in which entities at one layer provide services to higher layers and make use of services at lower layers. This enables one to model functions in a way that makes it clear what happens when you connect them in various ways.
It is essential to understand that there are no “side doors”. You connect with your peer by making use of a joint service (e.g. Two MACs talking down to two PHYs linked by a wire). The ISO model is a consistent language. You can feel free to draw boxes
just anywhere, if you want to (e.g. off the side of a MAC), but now you lose all meaning, because you’re operating outside the language. A box on the side of a MAC has no semantics that can be related to the other functions.
What the complex diagrams show is exactly what connectivity you get in exactly what situations. It points out why DSs that employ 802.1Q bridges (and many do!) work. It points out exactly why the “one connection point to the bridged LAN” rule is essential.
It shows exactly where you have to put “magic” to avoid silly packet flows caused by that rule. It does so in a language, like mathematics, that is clear, precise, but not always trivial or obvious. That is the price of accuracy. The “complex” diagrams
show you exactly where the issues are and are not, if you are worried about the question, “Do these diagrams make my DS implementation non-conformant?” (The answer is “NO!!”)
The suggested diagram has the problem that, if I place a bridge on top, I have no idea whether the packets will loop or not, or whether I will have connectivity or not, because I don’t know what a side door on a MAC means. (“It does the right thing” is
meaningless.) The “complex” diagrams tell me exactly what I need to know. Replacing precision with ambiguity is not helpful.
— Norm
All,
This is notice that the ARC SC will hold a teleconference on March 30, at 12pm (noon) ET, for 1 hour, to continue review of a presentation on an alternate way to diagram 802.11 architectural concepts, especially
APs, and by extension how TGak might be viewed as fitting into the overall architecture.
The draft agenda and join.me meeting information are below.
Mark
Draft agenda:
1.
Call to order, patent policy, attendance
2.
Review presentation on architectural descriptions – Dick Roy (SRA):
11-16-0457-00-0arc-802-11ak-802-1ac-stas-aps-dses-and-convergence-functions.pptx
3.
AOB
4.
Adjourn
Note that teleconferences are subject to IEEE policies and procedures, see:
–
IEEE Patent Policy
–
Patent FAQ
–
Letter of Assurance Form
–
Affiliation FAQ
–
Anti-Trust FAQ
–
Ethics
–
802 LMSC P&P
–
802LMSC OM
–
802 WG P&P
–
IEEE802.11 WG OM
==================
You have been invited to a
join.me online meeting
Join the meeting:
https://join.me/IEEE802.11
On a computer, use any browser with Flash. Nothing to download.
On a phone or tablet, launch the
join.me app and enter meeting code:
IEEE802.11
Join the audio conference:
Dial a phone number and enter access code, or connect via internet.
By phone:
United States - Camden, DE +1.302.202.5900
United States - Detroit, MI +1.734.746.0035
United States - Hartford, CT +1.860.970.0010
United States - Los Angeles, CA +1.213.226.1066
United States - New York, NY +1.646.307.1990
United States - San Francisco, CA +1.415.655.0381
United States - Saugus, MA +1.781.666.2350
United States - Tampa, FL +1.813.769.0500
Access Code 808-571-868#
Other international numbers available
==================
_______________________________________________________________________________
IF YOU WISH to be Removed from this reflector, PLEASE DO NOT send your request to this CLOSED reflector. We use this valuable tool to communicate on the issues at hand.
SELF SERVICE OPTION: Point your Browser to -
http://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGAK and then amend your subscription on the form provided. If you require removal from the reflector press the LEAVE button.
Further information can be found at:
http://www.ieee802.org/11/Email_Subscribe.html _______________________________________________________________________________
_______________________________________________________________________________
IF YOU WISH to be Removed from this reflector, PLEASE DO NOT send your request to this
CLOSED reflector. We use this valuable tool to communicate on the issues at hand.
SELF SERVICE OPTION:
Point your Browser to - http://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGAK and
then amend your subscription on the form provided. If you require removal from the reflector
press the LEAVE button.
Further information can be found at: http://www.ieee802.org/11/Email_Subscribe.html
_______________________________________________________________________________
|