Patent ID: 9025544
Filing Date: 2015-05-05
Classification: H04W

Abstract:
1. A channel access method performed by an originating station in a wireless local area network (WLAN) system using a multi-channel including a plurality of subchannels, the method comprising: transmitting RTS (Request To Send) frames to a destination station via the plurality of subchannels, respectively; receiving CTS (Clear To Send) frames transmitted by the destination station via the plurality of subchannels in response to the RTS frames; and transmitting data via the subchannels via which the CTS frames have been received, wherein the RTS frame comprises first duration information and second duration information as references of setting a network allocation vector (NAV) of a third station, wherein the first duration information is information as a reference for NAV setting of a station which transmits a frame via one of the plurality of subchannels, and the second duration information is information as a reference for NAV setting of a station which transmits a frame via two or more contiguous subchannels among the plurality of subchannels, wherein the second duration information is a transmission opportunity (TXOP) period obtained by the originating station, and wherein the RTS frame further comprises information indicating an access category of the data in order to adjust a TXOP time.