Method and Apparatus for data transmission in a wireless local access network and System therefor

The present invention relates to a data transmission in a wireless local area network, especially a method of transmitting data in a state for managing a power and device and system therefor. If the method of transmitting data in a wireless terminal associated with the access point (AP) in a wireless local area network of the present invention, the data waiting to be sent to the AP in the stand-by state of the central processing unit (CPU) is present, wait state enters the AP informing frame process, receiving the transmission standby data from the process, and the AP transmitting the frame notifying standby state release to the AP if the step of transmitting the (standby state entry frame), which the CPU switches to the active state a It includes. A wireless local area network, the power save (PS) mode, WoW (Wake on WLAN), enters a standby state notification frame, the notification frame standby state release, the active state switching completion signal