ember 16, 2009 12:39 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
Thanks everyone, for the great replies to my post. The Xirrus arrays
are interesting, and may come into play if budgets improve. What we are
going to do for the time bei
2009 12:12 PM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
>
> John,
>
> As everyone else has said, adding APs to the room might cause some big
> problems with interference. At Washburn we use Xirrus wireless arrays
> to
>
John,
As everyone else has said, adding APs to the room might cause some big
problems with interference. At Washburn we use Xirrus wireless arrays to
provide high density coverage all over campus. Each array as multiple
directional radios that can operate either frequency ranges (or both
with
: Wednesday, August 19, 2009 5:40 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
We have 3 Meru APs covering 2 classrooms (capacity 100 each) where
students
use the WiFi to take exams online. We have had up to 90 users at a
time
using
Behalf Of Cortes, Diana
Sent: Wednesday, August 19, 2009 5:40 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
We have 3 Meru APs covering 2 classrooms (capacity 100 each) where students
use the WiFi to take exams online. We have had up to 90
-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Rick Brown
Sent: Wednesday, August 19, 2009 9:03 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
We actually solve the
We actually solve the issue by using 802.11a for high density
environments. We still provide G coverage but our policy has been that
if you want guaranteed throughput and coverage in a classroom
environment then an 11A AP should be installed for every 20-25
students. When we first implemented
First, I don't think 50 users in a room is much to worry about for any
pair of modern access points. Unless the users are all going to be
high throughput users. For large open lecture halls being setup with
the highest throughput in mind my recommendation regardless of
equipment would be:
As best that I can tell, none of the wiring that is in the pictures you sent me
are ours. They look like audio & video cables, not network cables. Are you sure
that this is something you want to talk about with me?
-jcw
-
John WattersUA: OIT 205-348-399
The addition of directional antennas and diversity can really help. The
direction antennas can be placed high up in the cat walks facing down
and using antenna diversity helps mitigate multipath signals. (Of course
with 802.11n both client and AP have multiple receivers and transmitters
for m
Behalf Of Ryan
Holland
Sent: 11 August 2009 16:42
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one
room
Reducing transmit power
should reduce the
range devices can connect at particular data rates. You can remove
support of
some of
es Constituent Group Listserv
To
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
cc
Subject
Re: [WIRELESS-LAN] Large numbers of clients in one room
I understand that reducing the transmit power reduces the range that
devices can connect at particular data rates, what I was saying was that
in practi
Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Jason Appah
Sent: Tuesday, August 11, 2009 11:44 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
I know that
h...@hw.ac.uk <mailto:p.j.meth...@hw.ac.uk>
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Ryan Holland
Sent: 11 August 2009 16:42
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clien
@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
Out of interest what level of transmission did you lower your APs to? I've
found changing transmit power has very little effect within a single
"open-plan" room, it only really seems to have much effect when
I know that with aruba, we summarily have more than 40 people in a
single room , we have two access points and band steering turned on.
Nary a complaint (knocks on wood) it seems to load balance just fine.
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[m
SE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
] On Behalf Of Greg Gardner
Sent: 11 August 2009 16:21
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
Our team designed our system to accommodate large nu
We have a similar "permanent" requirement for this in one of our lecture halls.
Our solution has been 3 Access points, on 3 non-overlapping channels (channel
1,6 and 11). Each AP handles about 15-18 users at about 2 Meg near continuous
throughput per user on b/g if required. I looked at putting
nstituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Greg Gardner
Sent: 11 August 2009 16:21
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Large numbers of clients in one room
Our team designed our system to accommodate large numbers of people in
one area
Our team designed our system to accommodate large numbers of people in
one area by installing a greater density of AP's, lowering the AP
transmit power, turning off the slower B transmit rates, and encouraging
users to utilize 5Ghz N.
Thanks,
Greg Gardner
Manager, Network Communications
Informa
depends on the AP model and how big the room is, you'll have a nice fat
problem with channel interference since you're in the b/g range, but
each ap (as long as it's not terribly ancient) should handle 10-20
clients before starting to reject connections or suffer unusable
performance.
it also
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