News for hackers. Stuff that matters.

A comment on WiFi without internet on a Southwest flight. Parent comment

Re:WiFi without internet on a Southwest flight by grishka on Friday September 29, 2023 @01:15AM (#37699543)
> Frankly I'm surprised a single WLAN radio can pull that off.

Maybe at the cost of latency because it has to switch channels back and forth?

> Most laptops can't do this, right?

Any laptop can do this if you plug a USB WiFi dongle into it :P

[ Parent | on HN ]
Re:WiFi without internet on a Southwest flight by cromka on Friday September 29, 2023 @03:19AM (#37700334)
It doesn’t have to switch channels, it will create another station using same channel.
[ Parent | on HN ]
Re:WiFi without internet on a Southwest flight by avidiax on Friday September 29, 2023 @03:21AM (#37700348)
> Maybe at the cost of latency because it has to switch channels back and forth?

Not necessarily. It can be a client on 2.4Ghz and an access point on 5Ghz. Even without that, if it has MIMO, then one of the antennas can be receiving 2.4Ghz while the other is sending (at least in theory, if the crosstalk between the antennas is low and the selectivity of the receiver is sufficient).

[ Parent | on HN ]