RE: stds-80220-requirements: New Material: Priority Access
Jim-
I used the term "QOS" as a title of things we need to consider. I would
also refer you the discussions at 802.11e. They are addressing the same
issues. But I am not saying that we need use their solution. I am saying
that we need to see (1) what issues were raised, (2) determine how we are
going to solve or avoid them, and (3) are there other issues unique to
802.20?
alan
-----Original Message-----
From: Jim Tomcik [mailto:jtomcik@qualcomm.com]
Sent: Monday, October 27, 2003 3:10 PM
To: Chickinsky, Alan; 'Stds-80220-Requirements (E-mail)'; Marc Goldburg
Subject: RE: stds-80220-requirements: New Material: Priority Access
At 04:42 PM 10/24/2003 -0700, Chickinsky, Alan wrote:
>Jim-
>
>can we say that Priority Access is a case of QOS?
Alan,
I was considering whether QoS was sufficient, but I fear it might not
be. To deal with priority access there are several items to consider, some
of which involve MAC, in particular.
1. QoS support is certainly part of the picture; its needed to control the
flow of data to/from a Mobile Terminal in the presence of network
congestion.
2. I don't think QoS covers the ability of the infrastructure to bump
(i.e. terminate connected service to) already connected terminals in an
overloaded system when priority-authorized stations are trying to gain
access. This function isn't as simple as a disconnect, either. Most MTs
today will retry until they succeed, thus keeping the access mechanism
clogged up.
3. QoS doesn't seem to cover the MAC issue of allowing/granting a subset
of so-authorized MTs to contend for access to the wireless medium when many
un-authorized MTs may be trying to access the medium too.
Marc, to achieve items 2 and 3 above, I think this might have to be be a
device-type authorization issue. From an infrastructure viewpoint, there
has to be some way to sort out devices trying to get access to the system.
Jim
>alan
>
>-----Original Message-----
>From: James Tomcik [mailto:jtomcik@qualcomm.com]
>Sent: Friday, October 24, 2003 5:55 PM
>To: 'Stds-80220-Requirements (E-mail)'
>Subject: stds-80220-requirements: New Material: Priority Access
>
>
>
>As I review the requirements document, I realize that the requirement for a
>priority access mechanism has been lost. Accordingly, please re-include
>the following in an appropriate section:
>
>x.x.x Priority Access Mechanism
>
>The Air Interface shall provide priority access to authorized Mobile
>Terminals.
>
>
>Rationale:
>
>In emergency situations, wireless communications systems typically are
>overloaded very quickly, making communication among emergency personnel
>nearly impossible. This requirement provides for support to these critical
>communication situations. This is becoming a requirement in other
>commercial systems and should be also carried into 802.20's air interface.
>
>...........................................................................
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> James D. Tomcik
> QUALCOMM, Incorporated
> (858) 658-3231 (Voice)
> (619) 890-9537 (Cellular)
> From: San Diego, CA
> PGP: 5D0F 93A6 E99D 39D8 B024 0A9B 6361 ACE9 202C C780
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James D. Tomcik
QUALCOMM, Incorporated
(858) 658-3231 (Voice)
(619) 890-9537 (Cellular)
From: San Diego, CA
PGP: 5D0F 93A6 E99D 39D8 B024 0A9B 6361 ACE9 202C C780
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