Wifi rates

[Cedric GROSS]

Hello,

 

Part of splitting work, I continue to investigate on my side for my NIC
(Centrino 2230).

 

I notice that from ifconfig wlan0 :

media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11ng

 

Rate is very slow and should be 54Mbps.

 

I try to understand how rates is determined but it's really a mess.

So first question : From where ifconfig get rate ?

 

What's CCK, MCS, plcp stand for and what is relationship with rate ?

 

I try following linux kernel also but it's  a nightmare.

 

Thanks.

 

Cedric