Patent ID: 7944874

Claim:
A method of delivering a control frame for a device which communicates through a wireless local area network (LAN), the method comprising: receiving a control frame including time information for controlling medium access and recipient address information; checking recipient address information; and broadcasting the received control frame in a selective manner based on a checking result, wherein, in the control frame, a duration field of a MAC (medium access control) header has a value of 0, wherein the control frame is a Contention-Free-End (CF-End) frame, wherein the broadcasting the received control frame comprises broadcasting the received CF-END frame if the checking result indicates that a basic service set ID (BSSID) recorded in the CF-End frame coincides with a BSSID of a BSS (basic service set), and wherein the broadcasting the received control frame further comprises broadcasting the received CF-END frame when a short inter-frame space (SIFS) elapses after the CF-End frame is received.