Perez Jeffrey Lee Cynthia Taylor Laura

I see another theory that says the minimum RSSI also need to -82 dbm. So, its combination of minimum SNR and Minimum RSSI. Is that true? Why people are not talking about this minimum RSSI needed?

Interesting topic. This echoes some thoughts I was having after watching the 7signal video on Channel Utilisation, about limiting low data rates (to prevent slow management traffic holding up fast data transfers) and/or using longer beacon intervals (again which older devices might not like). Therefore consider those old devices as obsolete and should not be catered for as they will have a detrimental effect on other network users with more capable technologies.

It really doesn't help that the video does not show the leftmost columns with the actual MCS Index numbers.

Very useful advice. I've just been through this process planning for our outdoor weekend agricultural /horticultural village Heckington Show in England. No infrastructure, just open fields (greenfield site where everything has to be left as it was found). Used all TP-Link Omada kit, bridges EAP215, EAP211, mesh APs EAP650 and long range CPE710 bridge devices. Raised on 5m scaffold tubes. Generators supplying PoE via injectors. Minimal network cabling due to 30,000 people and vehicles on the showground over the weekend. Direct cat7 where possible at key locations. Driboxes IP66 at base of each mast containing power adapters and PoE injectors. Earth leads from devices on masts down to ground. 40mm upvc drain pipe fit snugly in tops of scaffold, with EAP650 and/or bridge units strapped to the upvc pipe to avoid RF shadow that may have been caused by the metal scaffold tubing. Each mast was supported vertically by 3x square section oak posts around the scaffold tube, driven into the ground by the forks of a JCB "teleporter" that we use to unload and move marquees, generators etc around the site. The teleporter also has a cage to safely lift us to the top of the mast to setup/teardown or align bridge units, etc. There were numerous config teething problems and optimisation challenges, but all good in the end. The Wifi was not for public use, only to enable trade stands to accept card payments, because in previous years the mass of people at the show were overwhelming the local telecoms masts, so preventing traders connecting to their 4g LTE provider phone services to take payments. Quotes for external specialists were eye watering and would have been repeated annually. Taking the DIY approach has been a challenge but saved us massively in cost for the next few years.

I can't believe this video has no comments! It's probably the best info I've found about Wi-Fi channels. Especially re hiding ssid's, probes and DFS channels. I had been advised to hide my multiple Ssid's, and also make use of DFS (but beware of radar strikes). Thank god I didn't heed their advice. I felt hiding was going to be very difficult for our target audience to get their head around connecting to ssid's they couldn't see/select (non-public WiFi, for traders payment card readers/phones at an outdoor event). We had no radar hits, so DFS channels really helped spread out our mesh AP groups to reduce interference. So glad I went with my gut feeling as it could have been disastrous with me not having a clue why people couldn't connect. I've only just had time to watch this video after the event was finished.

This is free and safe to sign in

Excellent! Great video!

good day, yeah. so unreal vvideo~7signal! =))

"confidential do not distribute" LOL

What happened to the profile?

Is this free?

Love it Jack!

Thank you, that is very insightful. I can't wait to get my hands on this book.

Good to known about History of Wifi and actress getting Wifi Patent...

I am currently re-reading a old textbook called: "WiFi Fundamentals". This video and the textbook gives me a grounded understanding of the workings behind WiFi.

INTERESTING!

Interesting.

Helpful

Thank you for sharing.

Thank you that was very helpful!

Awesome stuff! @27:00 - "Over 80% of frames are <256 bytes" - the ultimate argument of why to use 20MHz channels!

@43:15 - I was thinking about this as well. My initial though is - these RF engineers are pretty dang smart so they do have reason to put the ED where it was - and my guess is that with WiFi or RF in general, as long as the desired signal is much stronger (like 20dB or more), then the other signal won't be heard (it will be covered up) and therefore you can both use the channel. Think of it like in Ham Radio or CB radio. If you and your friend are +30dB over S9 to each other, then two other stations further away that are S5 are talking, it won't affect your conversation (and those S5 stations to each other also can likely talk to themselves as well), you can both share the channel effectively. When this would really become an issue is for very weak clients, then the client is weaker than the other AP on the same channel and you get squashed. It would be like in Ham Radio, the S5 signal station is the one I'm trying to talk to but an S9 station keys over them. Cheers!

👍

Promo-SM

Nice presentation, thanks for posting. Lips removed at 45:15 lol!

awesome presentation

What can you say about the MCS dropping from a good 9 down to 3, while RSSI remains stable at -42 dBm and SNR stable at 63 dB?

@26:40 - For free-space propogation, 4*pi is the surface area of a unit sphere, c is the propagation speed of light. The underlying assumption here is isotropic radiation. The reason it's a "plus" and not a "times" is because the equation is in logarithmic form. However, the equation is wrong, because it should be 20log(4*pi/c), not just 4*pi/c.

Thanks for wonderful video .. Again i have a confusion in understanding TLS..Why TLS is required ? Since already WIFI data's are encrypted with authentication method, Why TLS is required ? Especially for WIF deployments.. Layer 2 authentication..

Fantastic talk on IoT

Could you please explain about two ray model, three ray model , slow scale and large scale fading for WiFi outdoor

Thank you, much appreciated!

thanks alot keith and 7signal team for the valuable details; question please for the FSPL @ 09:03 minute; the chart of 2.4 and 5 Ghz loss assuming both bands are transmitting at same TX power from the access point; in some use cases we found that 5GHz band do transmit at 200mw "double the 2.4 band at 20dbm" can we expect that if we add 3db to 5GHz the scale will be correct with more power on each point to the benefit of 2.4Ghz band; so 2.4 coverage will still be better even we double the tx power at 5GHz band radio?

Gracias from Texas....

Gracias from Texas 👍

Love your videos! Thank you all for what you're doing for us! I learn so much from you. Thanks again

I am impressed that 7Signal is able to produce such informative and engaging webinars so consistently! I absolutely love these! Thanks 7Signal!!

Gracias from Texas 👍

p̶r̶o̶m̶o̶s̶m̶

Gracias from Texas :)

kzbin.info/www/bejne/hIbWXoWBaJ6WgJI

could anyone please share me it's web link ? interested to check it

Great presentation. Sounds like it’s a solution in search of a problem. What is one thing that Wi-Fi 6E does that Wi-Fi6 cannot? I think that would be a good topic. My initial observations are that Wi-Fi6E does provide something that Wi-Fi 6 does not and that is for outdoor Wi-Fi because a lot of 5 GHz is saturated but this is not really an issue for indoor Wi-Fi. So working in the wisp industry I see Wi-Fi6E being more useful for point-to-point in point multipoint outdoor applications than indoor as far as it being some sort of game changer. 6 GHz indoors doesn’t do anything that 5 GHz doesn’t already do.

Gracias from Texas 👍

Nice, well-done presentation. OFDMA is MU-MIMO in Wi-Fi 6. SU-MIMO in Wi-Fi 6 is still OFDM.

You are too easy on your calculations. You should have checked your results against the MCS tables. The vendor combines the speed of the two radios into one number. You first have to separate the speed into the two bands My advice is to only look at the 5GHz radio. So the Netgear AC1900 is a AC 600+1300 Router. Using your formula for just the 5GHz band will yield. It achieves this top speed using 80 MHz channel and 3 spatial streams. So you cant divide that speed in half in the first step. Divide by 3 then and multiply with 2 to get the speed for your laptop. So you will get 866 which also is listed in the MCS table. The 4300 ax Nighthawk is a 3SS stream device so only uses 3 antennas. MAx speed is 3600. So 1800 for 80 MHz and this 600 per stream and your Window machine gets 1200 Mbit/s. Skip taking an average over the 2 radios. Because your . . .

Nice presentation..at 22.44, the A-MPDU figure has a collection of PPDUs.. it should be a collection of MPDUs going out as a single PPDU

Can I use this for Long Range Communication WiFi system's?

Some really great Wi-Fi spectrum analysis examples!