This was session 370 of the free Wi-Fi Design Class, where Ferney demonstrated Hamina design software by creating warehouse-scale Wi-Fi designs. The session covered capacity planning limitations, client roaming behavior, and the challenges of using omnidirectional antennas in large spaces like warehouses. Ferney explained that capacity calculations in software tools like Hamina and Ekahau are unreliable because they cannot predict actual client behavior when choosing access points, and showed how RRM (Radio Resource Management) can cause power levels to be set too low if not properly configured. The class learned how to import warehouse floor plans, create attenuation objects for high racks and conveyor belts, and design with both omnidirectional and directional antennas. Ferney demonstrated the benefits of using directional antennas with narrow beam widths and proper tilts, showing how they can provide targeted coverage down aisles while avoiding interference. The session concluded with a practical demonstration of using Shettle’s tool to modify and rotate 3D objects before importing them into Hamina, allowing for easier customization of warehouse elements like racks and equipment.
Chat Notes:
00:22:41 Mark Zeigler: Is there a control plane connection so that changing channel on the AP in the Hamina map changes the channel transmitting in the AP?
00:35:30 Gurpreet: https://www.youtube.com/watch?v=q0Aa7haw7lU&list=PLXJsNZqZEF9YI_whgRZsCdER90QbKgaWx&index=1
00:36:08 Gurpreet: Roaming Wars: How Different Devices Roam | Jerry Olla | WLPC Phoenix 2025 👆
00:48:46 simon: mixed channel width?
00:58:33 Hiten J. Thakkar: I might be confused on the term, will not RX-SOP come in play/
01:02:26 Gurpreet: It was developed to reduce CCI or CCC and is mainly on how AP hears not the client
01:04:13 Gurpreet: https://packetpushers.net/podcasts/heavy-wireless/hw084-spatial-reuse-in-wi-fi/ – great discussion by Keith and Jake
01:05:04 Ned Neece: RX-SOP, be careful.
01:06:00 Gurpreet: https://www.youtube.com/watch?v=QzZVo2PaBxU
01:06:11 Gurpreet: Practicing Safe RX-SOP | Jake Snyder | WLPC Prague 2018 👆
01:19:06 Alexandre Vianna: Its ppssible to use the AP Cisco 9176D1-ROW?
01:28:19 Hiten J. Thakkar: A while ago we had seen a warehouse that had robots moving Storage racks, how would you emulate a floor below with access points/antennas pointing up to the floor above? Thanks
01:28:49 Zaur Nedashkovskiy | Linear Technologies, inc.: I think it would be a great idea IF RF visualization would be in 3D as well
01:38:32 Walid Abdelkader: Antenna downtilt and coverage calculator
01:57:38 Hiten J. Thakkar: Ceiling height is 40 ‘
02:20:11 Hiten J. Thakkar: Ksheitel started as a RF spectrum Manager at a new place in Norway, this week