doc.: ieee 802.11-05/0940r0 submission sept 2005 darwin engwer, nortelslide 1 thoughts on the...
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Sept 2005
Darwin Engwer, Nortel
Slide 1
doc.: IEEE 802.11-05/0940r0
Submission
Thoughts on the 802.1AM PAR
Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
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Date: 2005-09-19
Name Company Address Phone emailDarwin Engwer Nortel 4655 Great America
Pkwy, Santa ClaraCA
+1-408-495-7099
Authors:
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Sept 2005
Darwin Engwer, Nortel
Slide 2
doc.: IEEE 802.11-05/0940r0
Submission
Abstract
“I've flown from one side of the network to the other. I've seen a lot of strange stuff, but I've never seen anything to make me believe there's one all-powerful force that can control everything.”
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Sept 2005
Darwin Engwer, Nortel
Slide 3
doc.: IEEE 802.11-05/0940r0
Submission
The field is very broad
• A: not clear whether 802.1AM will address over-the-air mgmt or over-the-backhaul network mgmt, or both– poor scope definition in in the 802.1AM PAR
• B: Technical feasibility is greatly in question
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Sept 2005
Darwin Engwer, Nortel
Slide 4
doc.: IEEE 802.11-05/0940r0
Submission
Technical Feasibility
• over-the-air management
• over-the-backhaul network management
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Sept 2005
Darwin Engwer, Nortel
Slide 5
doc.: IEEE 802.11-05/0940r0
Submission
over-the-air "management”
• there is no common framework for over-the-air "management" between different RF technologies (within 802.11 let alone within 802)
• it is not viable bcus the devices operate in difference frequency bands using different modulation types and no single radio can (simultaneously) operate across all those bands/ modulation types.
• perhaps a SDR could perhaps do something in this regard by altering it's operational mode over time. But doing so on the fly is [today] impossible.– needs to be real-time to address temporal aspects of the issue
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Sept 2005
Darwin Engwer, Nortel
Slide 6
doc.: IEEE 802.11-05/0940r0
Submission
over-the-air "management” (cont’d)
• well, unless you have a universal wideband transceiver.• maybe this is a "subspace" communication [vs. today’s
"ether" space communications] and we don't know how to do that today– subspace communication would need to occur outside space and
time; currently that is only science fiction
• hence my updated position is not that over-the-air "management” is impossible, but that the fundamental support technologies required to make it work don't yet exist.
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Sept 2005
Darwin Engwer, Nortel
Slide 7
doc.: IEEE 802.11-05/0940r0
Submission
over-the-backhaul network management
• there is no common framework for over-the-backhaul network management between different types of RF networks
• the backhaul networks are different types, and are not interconnected
• even if they were interconnected they are likely in different administrative domains– e.g. the hotel network is isolated from the 802 meeting net
• even if not isolated; which network has higher authority?– e.g. hotel net does what our network tells it to do or vice versa?
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Sept 2005
Darwin Engwer, Nortel
Slide 8
doc.: IEEE 802.11-05/0940r0
Submission
over-the-backhaul network management (cont’d)
• further, some RF network types have no backhaul component at all (e.g. 802.15 and 802.11 IBSS/ ad hoc networks)
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Sept 2005
Darwin Engwer, Nortel
Slide 9
doc.: IEEE 802.11-05/0940r0
Submission
Summary
• Feasibility remains in question– this is not addressed by the 802.1AM PAR
– not yet responded to by 802.1
– therefore the question remains open• could be addressed by a supporting document if space in the PAR
document is unduly constrained
• Value proposition is also unclear– i.e. what is the value or benefit vs. the required effort?
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Sept 2005
Darwin Engwer, Nortel
Slide 10
doc.: IEEE 802.11-05/0940r0
Submission
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Sept 2005
Darwin Engwer, Nortel
Slide 11
doc.: IEEE 802.11-05/0940r0
Submission
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Sept 2005
Darwin Engwer, Nortel
Slide 12
doc.: IEEE 802.11-05/0940r0
Submission
Q & A
• Q: Is there a useful partial solution?– because RF is a shared medium, solving part of the problem
essentially doesn't solve the problem
– a partial solution would be like arranging things so you can be partially not pregnant• I'm an optimist so I won't say that's impossible
• but any partial proposal should indicate how it will avoidthe "9 month surprise"
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Sept 2005
Darwin Engwer, Nortel
Slide 13
doc.: IEEE 802.11-05/0940r0
Submission
References
• 11-05-0892-01-0wng-dot1am-work-sizing.xls
• 11-05-0907-00-0wng-dot1am-management-plane.ppt
• 11-05-0908-00-0wng-dot1am-management-par-5c.doc