>A standard should not be an excuse to do something stupid. Well stated sir! This of course will become a far more challenging conversation when XOR radios start to trickle into our environments. Balancing capacity increase with support for 2.4GHz will make our lives... interesting. :) -Sam
On Fri, May 27, 2016 at 11:20 AM, Chuck Enfield <[email protected]> wrote: > Agreed. An AP per classroom is our “standard” because it usually makes > sense from a cost vs. performance perspective. That said, when we’re > dealing with small rooms separated by drywall partitions we sometimes cover > more than one classroom with an AP. In some unusual circumstances more APs > will actually hamper performance, and cost more too. A standard should not > be an excuse to do something stupid. > > > > Chuck Enfield > > Manager, Wireless Systems & Engineering > > Telecommunications & Networking Services > > The Pennsylvania State University > > 110H, USB2, UP, PA 16802 > > ph: 814.863.8715 > > fx: 814.865.3988 > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > [email protected]] *On Behalf Of *McClintic, Thomas > *Sent:* Friday, May 27, 2016 11:59 AM > > *To:* [email protected] > *Subject:* Re: [WIRELESS-LAN] Beacon Intervals > > > > This is a great article and contains very good information. > > > > However, I follow the same belief as Jeff. This is mostly from a growth > and future perspective of 802.11ac, etc. In order to take as much advantage > as possible of ac (256 QAM an MU-MIMO); an AP per classroom looks more like > a requirement. > > > > Turning off 2.4 every other room and ensuring your power levels/data rates > help promote a healthy environment and needs to be considered. > > > > From a cost perspective, if I can provide a consistent high throughput to > each classroom; I can remove port and cabling requirements which actually > help lower my overall cost to provide connectivity to them. > > > > Good discussion and no simple answer or cookie cutter solution seems to be > available. > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ > mailto:[email protected] > <[email protected]>] *On Behalf Of *Samuel Clements > *Sent:* Friday, May 27, 2016 9:26 AM > *To:* [email protected] > *Subject:* Re: [WIRELESS-LAN] Beacon Intervals > > > > Sure, but there is a great writeup on that exact topic that does a good > job in my stead: > > > http://www.wlanpros.com/wp-content/uploads/2014/04/Why-One-AP-Per-Classroom-Approach-is-Wrong-.v3.pdf > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.wlanpros.com_wp-2Dcontent_uploads_2014_04_Why-2DOne-2DAP-2DPer-2DClassroom-2DApproach-2Dis-2DWrong-2D.v3.pdf&d=CwMFaQ&c=6vgNTiRn9_pqCD9hKx9JgXN1VapJQ8JVoF8oWH1AgfQ&r=rYfqH_8oTvcXxRxUI3x3m3Y7Nwgir7tnuoGbdZsrUM4&m=ncBtrtKYxauw_dR51VE698DYNU514ximcFqdJN_kPUg&s=VqXKIljFA578kWnmynVg8hlmnDK5pJA22Y5z74kNUk4&e=> > > > > In short, that may be a design you end up with, but assuming it's correct > to begin with is a premise that should not be used. Proper WiFi design > (including disabling radios or converting them to 5GHz radios if you have > hardware that can do that) is of paramount importance in any environment > that believes their network is of any measurable importance. Remember that > disabling lower data rates & changing beacon intervals can *mitigate* poor > design - but there is always a trade off (client compatibility being > chiefest). I don't necessarily disagree that in some environments, one AP > per classroom is what you would net, but I've seen far too many > environments where they over bought and a 1.5 classroom per AP (or some > other measure) would have supported the load just fine. I hate to see > people waste money when it could have gone to some other area of technology > to further the end goal - education. > > -Sam > > > > On Fri, May 27, 2016 at 9:18 AM, Jeffrey D. Sessler < > [email protected]> wrote: > > Sam, would you please explain your position on one AP per classroom being > a mis-design? Do you have data on this you could share? > > > > In my environment, I’ve found that in order to properly deploy 5 Ghz and > .11ac, it’s pretty much inevitable that we’ll get to one AP per room, > especially if one desires consistent and universal coverage. Data from > existing spaces clearly show gaps in 5GHz coverage when using an > every-other room scheme. > > > > Now if you are talking about 2.4 GHz I may agree with you, but even there, > with removal of lower data rates, and a low-power microcell design, the > data suggests it’s working very well. > > > > Jeff > > > > *From: *"[email protected]" < > [email protected]> on behalf of Samuel Clements < > [email protected]> > *Reply-To: *"[email protected]" < > [email protected]> > *Date: *Thursday, May 26, 2016 at 6:38 PM > *To: *"[email protected]" < > [email protected]> > *Subject: *Re: [WIRELESS-LAN] Beacon Intervals > > > > Remember folks, there is such a thing as too much RF and in the edu space, > this occurs quite commonly due to the One AP per Classroom mis-design > advice that was making the rounds some time ago... > > -Sam > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/ > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_&d=CwMFaQ&c=6vgNTiRn9_pqCD9hKx9JgXN1VapJQ8JVoF8oWH1AgfQ&r=rYfqH_8oTvcXxRxUI3x3m3Y7Nwgir7tnuoGbdZsrUM4&m=ncBtrtKYxauw_dR51VE698DYNU514ximcFqdJN_kPUg&s=HPDHvoHovprTQhsiFUsw4QxwXUGUV1LDIDYkFIB8rmE&e=>. > > > > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/ > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_&d=CwMFaQ&c=6vgNTiRn9_pqCD9hKx9JgXN1VapJQ8JVoF8oWH1AgfQ&r=rYfqH_8oTvcXxRxUI3x3m3Y7Nwgir7tnuoGbdZsrUM4&m=ncBtrtKYxauw_dR51VE698DYNU514ximcFqdJN_kPUg&s=HPDHvoHovprTQhsiFUsw4QxwXUGUV1LDIDYkFIB8rmE&e=>. > > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
