802.11ac New Features - A CWNP Webinar with Tom Carpenter

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Күн бұрын

In this webinar, Tom Carpenter, CTO at CWNP, discusses the new features in 802.11ac and the basics you need to understand related to them. This is the first in a series of webinars CWNP will be offering on the new 802.11ac amendment. The next webinar will address 802.11ac planning issues.

Пікірлер: 9

@radek5499 10 жыл бұрын

Great video, I'd love to see more

@tmmohan 8 жыл бұрын

At 10:00 minutes of this video, you said that GI of 400ns is the communication gap between frames. It is not the gap between frames. It is the gap between the adjacent symbols in the a frame.

@naWIN540 3 жыл бұрын

Yes, to overcome ISI.

@barryalan4069 4 жыл бұрын

Is there a 2020 version of training available has any changed?

@Willqad 10 жыл бұрын

How can I be informed on these kind of webinars?

@rockythelab1426 9 жыл бұрын

Hi Wireless experts. I have a quick question, this could be lame, but an explanation would be highly appreciated. So, SGI (400ns/800ns) was introduced so that each transmission burst in 802.11 requires a guard interval that makes it so transmissions do not interfere with one another. Questions : I read in a blog : In tests done in a closed environment, Without SGI, there was little to no packet error. With SGI, we saw a 30% increase in packet error rate. This is a significant increase in error, meaning that far more collisions are occurring ..... WHY less error without SGI ? If I disable SGI, that will lead to less throughput ... why ?

@CWNPTV 8 жыл бұрын

+Sachit Das The Guard Interval is used between symbols. With the SGI, in highly reflective environments, you may see higher packet error rates and need to use the 800 ns interval instead.

@tmmohan 8 жыл бұрын

+Sachit Das: if the GI is lesser than the delay spread of the channel, there will be ISI (inter symbol interference) and more chance of symbol errors (in turn packet errors). If you disable SGI(400ns) and start using LGI(800ns) , you are increasing the gap between symbols which doesn't carry any useful user information/data and so more overhead cause lesser throughput. Of course, with increasing GI, the ISI will be minimised/avoided.

@barryalan4069 4 жыл бұрын

Is there newer training updated to 2020?