Patent ID: 8023481
Filing Date: 2011-09-20
Classification: H04L,H04W

Abstract:
1. A method of transmitting a high throughput (HT) format data frame in a wireless local area network in which HT stations and legacy stations, coexist, the method comprising: adding a legacy format physical layer header to the HT format data frame, the legacy format physical layer header comprising information which indicates that a medium is being used while a frame exchange sequence is performed with respect to the HT format data frame; transmitting the HT format data frame with the legacy format physical layer header using channel bonding; and separately broadcasting a legacy format control frame, which allows the HT and legacy stations to concurrently reset a waiting time for using the medium after recognizing the information, through each of a plurality of channels used in the channel bonding when a time period elapses after the transmitting the HT format data frame with the physical layer header is completed, wherein, in the transmitting, the HT format data frame is transmitted at a bandwidth of 40 MHz by bonding two channels, each having a bandwidth of 20 MHz.