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Posts Tagged ‘802.11ac

Another great 802.11ac video from CWNP.

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CWNP has posted a new 802.11ac video over on their YouTube Channel (CWNPTV)

This new video covers Planning for 802.11ac, if you still have not had a chance to go through the IEEE document or mess around with any new 802.11ac equipment this video is worth a play through. It covers the common pitfall of coverage vs capacity (Which does not only pertain to 802.11ac). I’ve seen many places and people simply deploy wireless based on signal strength, and if you have done more than a few wireless deployments you know signal strength & coverage is only half the battle. Capacity and throughput is the other half.

The video was posted almost a week ago and still has less than 200 views, so I am just trying to spread the word. As there are a few other useful videos in that Youtube channel, it’s a worthy resource that should not be overlooked for anyone wanting to be more familiar with 802.11 Wireless.

Written by Stephen J. Occhiogrosso

April 30, 2014 at 10:30 AM

Posted in Wireless

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CWNP’s Intro video to 802.11ac

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I was catching up on some of my subscribed YouTube channels this weekend when I checked in on the CWNP TV channel, I then found a new video that was posted by Tom Carpenter just last week. It’s a good 45 minute video that goes over some great fundamental details of the new 802.11ac standard.

It’s definitely worth a listen to if you have not done any other research on 802.11ac and you are curious at how 802.11ac is able achieve its new record of wireless speeds. It also explains that we will see 2 different waves of 802.11ac, wave 1 (going on now) and a wave 2 where will see even more improvements.

Now, I don’t want to ruin anything from the video but you can find the video here.

Written by Stephen J. Occhiogrosso

September 30, 2013 at 10:27 AM

Posted in Wireless

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Wireless Networking and the 5 GHz RF Range.

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As I speak with other IT professionals concerning wireless networking, one thing that seems to shock people is when I start talking about the 5 GHz RF range. Usually the first thing they say is along the lines of “You are still using that?”, most people still see the 5 GHz range associated with the 802.11a standard and nothing more, while it’s true potential is finally coming to light (and people are now seeing the limitations of the 2.4 GHz frequency).

Since this topic can get in depth, and I prefer to keep my posts to a decent length, and to the point, we will jump into the advantages of utilizing the 5 GHz range:

  1. Less congestion, anyone who has been administrating or implemented a wireless knows how many other devices are using the 2.4 GHz range everything from BlueTooth devices (which is found in almost every phone), microwaves (found in office lunch/break rooms), to cordless phones. More particularly microwaves and cordless phones they will congest the 2.4 GHz spectrum without regard for any other device using the RF band. The 5 GHz does not suffer from as much interference as the 2.4 GHz  range does, of course proper survey’s should be done prior to rolling out a Wi-Fi network just to be sure.
  2. More non-overlapping channel, the 5 GHz range consists of 3 bands. These bands provide us with 21 non-overlapping channels this gives us the ability to more densely pack an area with 802.11a/n access points. Decreasing the amount of clients per AP (With proper load balancing) providing increased throughput, and making roaming a seamless process. Where as the 2.4 GHz range only gives us 3 non-overlapping channels (1, 6, 11). Detailed information on each UNII band can be found below.
  3. Channel Bonding. While you can perform channel bonding in the 2.4 GHz it is better suited for the 5 GHz range. Channel bonding is how you achieve speeds up to 600 Mbps in 802.11n it does this by making the channels 40 MHz wide compared to 20 MHz wide. Channel bonding at the 5 GHz range still leaves you with 12 non-overlapping channel, while channel bonding in the 2.4 GHz range gives you 1 (possibly 2) channel.
  4. Future use. The next wireless standard after 802.11n, is most likely going to be 802.11ac which is promising us Wi-Fi speeds in the Gbps’s it plans to accomplish this by using 40, 80, or 160 MHz wide channels this is going to rule out the 2.4 GHz range completely. (Unless it’s changed.)
  • UNII-1/Lower Band (5.150 to 5.250 GHz) Non-overlapping channels 36, 40, 44, 48
  • UNII-2/Middle Band (5.250 to 5.350 GHz) Non-overlapping channels 52, 56, 60, 64
  • UNII-2 Extended (5.470 to 5.725 GHz) Non-overlapping channels 100, 104, 108, 112, 120, 124, 128, 136, 140
  • UNII-3/Upper Band (5.725 to 5.825 GHz) on-overlapping channels 149, 153, 157, 161, 165

Written by Stephen J. Occhiogrosso

November 22, 2010 at 3:33 PM

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