Please feel free to follow this discussion
for more information on Capability bits.
We shall review our proposal in next telecon.
Best Regards
-Vivek
From:
owner-stds-802-11-tgv@ieee.org [mailto:owner-stds-802-11-tgv@ieee.org] On Behalf Of Sood, Kapil
Sent: Thursday, October 27, 2005
9:41 AM
To: Matthew Fischer;
STDS-802-11-TGV@listserv.ieee.org
Subject: RE: [802-11TGV] No
capability bits left?
Feel free to take a look at 11-05-0551r3.
We defined this in 11r, but later decided that we did not need it.
I am planning to propose this as a Sponsor ballot comment and resolution
for MA.
Best Regards,
Kapil.
503.264.3759
From: ***** IEEE stds-802-11-tgv
List ***** [mailto:STDS-802-11-TGV@LISTSERV.IEEE.ORG] On Behalf Of Matthew Fischer
Sent: Wednesday, October 26, 2005
12:03 PM
To:
STDS-802-11-TGV@LISTSERV.IEEE.ORG
Subject: Re: [802-11TGV] No
capability bits left?
The important thing to do, when defining
the new Extended Capabilities Element, is INSURE that the LENGTH field of the
element is NOT described with a FIXED value, but EXPLICITLY indicates that the
LENGTH field value is VARIABLE, and that receivers SHALL interpret those fields
which they can (i.e. the first X bytes of the element), and then toss any bytes
which appear beyond the limit of their understanding. This allows future
capability byte additions and compatibility.
Matthew
Fischer
Nice
Guy
408
543 3370
mfischer@broadcom.com
From: *****
IEEE stds-802-11-tgv List ***** [mailto:STDS-802-11-TGV@LISTSERV.IEEE.ORG] On Behalf Of Srinivas Kandala
Sent: Wednesday, October 26, 2005
11:56 AM
To:
STDS-802-11-TGV@LISTSERV.IEEE.ORG
Subject: Re: [802-11TGV] No
capability bits left?
--- This message came from the IEEE 802.11 Task Group V Technical
Reflector ---
Roger,
There has been a great deal of discussion
on this over the last 5 years – how do we handle when we run out of
capability bits? The solution we talked about in the WG (and most certainly
Tge) was to have a new IE called “Extended Capability Information
Element” and have the new capabilities added to this field. Also, please
note that in the ANA database, there is already a sheet that is dedicated to “Extended
Capability”.
Note that we do not need to have a bit in
the Capability Information Field reserved for “Extended/enhanced
Capability IE Present” – this new IE will have a unique Element ID
which is sufficient for the station to decode the meaning of the IE.
Regards,
srini
From: ***** IEEE
stds-802-11-tgv List ***** [mailto:STDS-802-11-TGV@LISTSERV.IEEE.ORG] On Behalf Of Roger Durand
Sent: Wednesday, October 26, 2005
11:29 AM
To:
STDS-802-11-TGV@LISTSERV.IEEE.ORG
Subject: [802-11TGV] No capability
bits left?
Unless
I am mistaken 11e consumed four of them which leaves only one
left for the post 11e groups and that one will
be consumed by 11k. This could have been a bit
better(pun intended J ), given
five
bits one could have created a table that could have supported 32
variations… So we are left with no capability bits remaining
for
post 11k task groups using the base format. My fear is that
just adding another octet will bust implementations, as the field was constrained
to 2
octets… This, I think, is potentially a
serious problem that requires some innovative thinking relative to
interoperability with legacy product…
How
about we designate the last remaining bit (the one 11k intends to use) to
designate an “enhanced capability” information element and
then just create an “enhanced
capabilities”
via
a
new IE
field
on the end of the packet order?
There
may be a better way to do this?
Sincerely
Roger Durand
rdurand@autocell.com
AutoCell
Laboratories
AutoCell.com
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