[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] 802.11 Beacon frame transmitter - mobile devices
|
From: |
Jason Abele |
|
Subject: |
Re: [Discuss-gnuradio] 802.11 Beacon frame transmitter - mobile devices |
|
Date: |
Thu, 6 Nov 2014 10:31:30 -0800 |
>> Any ideas why i cant find this network on any mobile device (smartphone,
>> laptop)?
It is probably the difference between passive vs active scanning. To
save time and consequently power, most battery powered wifi devices
use active scanning where the station sends a probe request and
expects to get a probe response from the AP (or beaconing device).
Typical dwell times in active scanning are 20-40ms / channel while
passive (listen only) scans are usually more like 110 ms / channel,
since the default beacon interval of many APs is 100ms.
If you have linux on your laptop, you might try 'iw wlan0 scan freq
$FREQ passive'
Jason