Method and apparatus for updating system information in wireless lan system

A method for providing system information updated in an access point (AP) of a wireless communication system, the method comprising:

• receiving a probe request frame comprising a change sequence field from a station (STA);
• and
• transmitting a probe response frame, including the change sequence field, responding to the probe request frame to the STA,
• wherein:
• the probe request frame is received from the STA by the AP when a value of a change sequence field received from the AP by the STA is different from a value of a change sequence field stored in the STA;
• and
• the value of the change sequence field included in the probe request frame is set as the value of the change sequence field stored in the STA.

A station (STA) apparatus for updating system information in a wireless communication system, the STA apparatus comprising:

• a transceiver;
• and
• a processor,
• wherein the processor is configured to transmit a probe request frame comprising a change sequence field set as a value of a change sequence field stored in the STA, to the AP using the transceiver when a value of a change sequence field received from an access point (AP) by the STA is different from the value of the change sequence field stored in the STA and to receive a probe response frame, including the change sequence field, responding to the probe request frame from the AP using the transceiver.

An access point (AP) apparatus for providing system information updated in a wireless communication system, the AP apparatus comprising:

• a transceiver;
• and
• a processor,
• wherein:
• the processor is configured to receive a probe request frame comprising a change sequence field from a station (STA) using the transceiver and to transmit a probe response frame, including the change sequence field, responding to the probe request frame to the STA using the transceiver;
• the probe request frame is received from the STA by the AP when a value of a change sequence field received from the AP by the STA is different from a value of a change sequence field stored in the STA;
• and
• the value of the change sequence field included in the probe request frame is set as the value of the change sequence field stored in the STA.