Comment on Recognize the mother of Wifi
h3ndrik@feddit.de 11 months ago
Wifi doesn’t use frequency hopping. That’s bluetooth.
Comment on Recognize the mother of Wifi
h3ndrik@feddit.de 11 months ago
Wifi doesn’t use frequency hopping. That’s bluetooth.
friend_of_satan@lemmy.world 11 months ago
www.ieee802.org/11/Documents/…/1196049D_scan.pdf
Honytawk@lemmy.zip 11 months ago
It may be dropped, but it was used in the beginning
Wouldn’t that not still make her the mother of Wifi?
h3ndrik@feddit.de 11 months ago
Hehehe, you can call her the mother of early 802.11 (and Bluetooth).
olutukko@lemmy.world 11 months ago
that’s not how it works
balp@feddit.nu 11 months ago
For the Bluetooth development, the developers of the technology didn’t know about her patent until their IP department was about to file for a patent. They added this patent to the list and then they got connected. As is the case with many, patent and patent connections. It’s a quite common way of how patents are connected, and part of the IP industry. R&D people come up with an idea, these people don’t read tons of patents but solve issues in an intuitive way. Then IP lawers dig into existing patents and make the legal connections.
h3ndrik@feddit.de 11 months ago
But that’s not part of 802.11n or 802.11g or a or what we call “Wifi”… 802.11 in itself is a pretty long standard, including all kinds of different things.
indepndnt@lemmy.world 11 months ago
I am not literally a part of my kids, but they wouldn’t be here without me.
bi_tux@lemmy.world 11 months ago
but still, without frequency hopping no 802.11, without 802.11 no wifi
MystikIncarnate@lemmy.ca 11 months ago
It actually is. The original standard published by the IEEE 802.11 group was 802.11, often referred to as 802.11 prime.
To put it simply, it was little more than a proof of concept. The only wireless cards that I know were made at that time, were very expensive and only purchased in very limited amounts by large corporations. Quickly afterwards it was replaced by 802.11a and 802.11b. the big difference between the two, was that b used 2.4ghz and could achieve 11mbps, while a used 5Ghz, and could achieve 54mbps.
Meanwhile prime was on 900mhz and if memory serves, never achieved more than a few Mbps.
802.11b was more popular because 2.4ghz was easier to make inexpensively at the time, and so 802.11g also used 2.4ghz, but was able to increase bandwidth by using OFDM. But now I’m off topic, I just find wireless history very interesting.
The point is 802.11 (prime) was a valid wireless standard.
MystikIncarnate@lemmy.ca 11 months ago
Just chiming in as a network tech that deals with these terms regularly.
802.11, sometimes called 802.11 prime, to differentiate the first protocol from the 802.11 (WiFi) group. This protocol was not really every in widespread use. A few early niche cases, but it was quickly supplanted by 802.11a and 802.11b.
The b standard was one of the first major WiFi versions to see adoption, which used DSSS, or direct sequence spread spectrum. Which fell by the wayside because OFDM was faster and more efficient, which led wifi speed increases from 802.11g, through wifi 4 (802.11n), WiFi 5 (802.11ac), and WiFi 6 (802.11ax). The more recent versions use QAM (wireless N+), which augments OFDM with amplitude modulation.
Beyond QAM, speed improvements at this point are minimal and usually require wider channel widths to get any significant improvement, so 802.11 has focused on multiple access improvements and since 802.11ac, have been making improvements to MIMO. They started with SU-MIMO, then one-way MU-MIMO, then two way MU-MIMO.
I haven’t read up on the changes in WiFi 7 yet beyond 6Ghz being added. I’ll look into it after it’s been fully ratified.
Long story short, they moved to 5Ghz and eventually 6Ghz, because there isn’t enough channel width in 2.4 for WiFi 5, and 5ghz was getting a bit difficult to sustain for the speed they’re trying to hit, so 6Ghz is the next logical step.