Method and device for selective decoding of beacon frame in wireless LAN system

A method of transmitting a frame by an access point (AP) in a wireless communication system, the method comprising:

• transmitting, by the AP, a frame including a first data part and a second data part to a station (STA),
• wherein the first data part and the second data part of the frame are encoded separately,
• wherein the frame further includes information used for determining, by the STA, whether to perform decoding of at least one of the first data part and the second data part, and
• wherein whether to perform the decoding is determined based on a change of at least one of the first data part and the second data part,
• receiving, by the AP, a power save-poll (PS-Poll) frame from the STA based on a decoded frame;
• and
• transmitting, by the AP, data to the STA based on the PS-Poll frame.

A station device for receiving a frame in a wireless communication system, the station device comprising:

• a transceiver;
• and
• a processor,
• wherein the processor:
• controls the transceiver to receive a frame including a first data part and a second data part from an access point (AP),
• wherein the frame further includes information used for determining, by the STA, whether to perform decoding of at least one of the first data part and the second data part,
• determines whether to perform the decoding of at least one of the first data part and the second data part of the frame using the information,
• performs the decoding of at least one of the first data part and the second data part when it is determined that the decoding is to be performed,
• wherein whether to perform the decoding is determined based on a change of at least one of the first data part and the second data part,
• controls the transceiver to transmit a power save-poll (PS-Poll) frame to the AP based on the decoded frame using the transceiver, and
• controls the transceiver to receive data from the AP based on the PS-Poll frame.

An access point (AP) device for transmitting a frame in a wireless communication system, the AP comprising:

• a transceiver;
• and
• a processor,
• wherein the processor:
• controls the transceiver to transmit a frame including a first data part and a second data part to a station (STA),
• wherein the first data part and the second data part of the frame are encoded separately,
• wherein the frame further includes information used for determining, by the STA, whether to perform decoding of at least one of the first data part and the second data part, and
• wherein whether to perform the decoding is determined based on a change of at least one of the first data part and the second data part,
• controls the transceiver to receive a power save-poll (PS-Poll) frame from the STA based on a decoded frame, and
• controls the transceiver to transmit data to the STA based on the PS-Poll frame.