Information signal to noise margin for power control and adaptive transmission rate of bits in WLAN IEEE 802.11h

Method for providing information to a wireless transmission station between a deestaciones plurality located within the coverage area of ​​a basic service set (BSS) in a network dearea wireless LAN (WLAN), comprising the steps of: determining a power of received signal; further it comprising the steps of: extracting (110) a data rate transmission of an incoming frame by a derecepcion station; calculating (120) a noise margin using a ratio of the received signal power regarding larequerida for reliable communication for the transmission rate of extracted data; and transmitting (130) the noise margin to the transmission station incoming frame.