Hello Group, We have traditionally designed to have AP's in common area(s) and hallways for serviceability. We too have encountered Cisco RRM reducing radio TX power to minimize interference. The current model moving forward will be to design for 5GHz with AP's located inside the rooms. Building construction materials and other sources of RF signal attenuation help create separate RF collision domains, which allows greater flexibility in channel reuse and increases network capacity. Depending on the capacity requirements and density of your AP deployment it may be a good practice to turn off the 2.4GHz radio off on certain AP's to get acceptable channel separation. We are contracting out 3-D RF Predictive Modeling to perform these designs. We also will be pulling 2 CAT6 cables to each AP location to prepare for 802.11ac which will coming this year and runs only on 5GHz.
Max Lopez Senior Wireless Engineer Office of Information Technology University of Colorado 3645 Marine St. Boulder, CO 80309 Direct: 303.492.2193 Mobile: 303.269.1228 Skype: mrmax05 https://www.colorado.edu<https://www.cu.edu/> http://www.linkedin.com/in/maxlopez http://twitter.com/mrmaxlopez From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of phanset Sent: Tuesday, January 22, 2013 11:59 AM To: [email protected] Subject: Re: [WIRELESS-LAN] students per AP in residence halls On Fri, Jan 11, 2013 at 9:50 AM, Tom O'Donnell <[email protected]<mailto:[email protected]>> wrote: I was wondering what other schools have for a ratio of students to AP's in the residence halls, either definitely or approximately? Tom, At University of Tennessee Knoxville, we have redone our Dorms this summer and have had great success with the new design (almost no calls to the Help Desk during back to school, compared to a total "fear" of back to school in previous years ;-) Here is what we did: -APs are located in rooms, designed to have 5 GHz in every room. -We stagger the APs to respect a ratio of 5 or 6 person per AP, with at least 100 Mbps uplink/AP -We cover everything at 5 GHz and let ARM (the Aruba algorithm) deal with the 2.4 GHz coverage (3 channels, not 4) -Usually the position of bathrooms dictates the pattern of AP location (in some cases we had to go to 4 students/AP just because the design of the building forced us to do so) In general, dual occupation rooms are much easier to deal with than single occupation rooms. -Some buildings have great penetration vertically, some have great penetration horizontally. The staggering will be a function of the building characteristics. We usually survey a few floors for each building to establish a pattern then do the rest on paper. We also use the Algorithm provided in Airwave to corroborate our findings. Hope it helps, Philippe www.eduroamus.org<http://www.eduroamus.org> If you have such a number, how do you count dual-band AP's? They're doing more than a 2.4GHz AP, but not quite as much as two AP's. Then one last related question... Would anyone know their relative mix of 2.4GHz vs. 5GHz connections in residence halls? Thanks. ---------------------------------------------------------- Tom O'Donnell Senior Manager of Network and Server Systems Information Technology Services University of Maine at Farmington (207) 778-7336<tel:%28207%29%20778-7336> ********** 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/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
