Patent ID: 8638772
Filing Date: 2014-01-28
Classification: H04B,H04L,H04W

Abstract:
1. A method for granting a transmission opportunity (TXOP) based on contention-free in a wireless local area network supporting a plurality of subchannels, the method comprising: receiving, by a station in a contention-free (CF) period, a CF-poll frame to obtain a TXOP, the TXOP being an interval of time when the station has a right to initiate frame exchange sequences onto a wireless medium, the CF-poll frame including a TXOP limit subfield specifying a time limit on the TXOP; and transmitting, by the station, at least one data frame during the TXOP using the plurality of subchannels, wherein a channel width granted for the TXOP is equal to a channel width of the CF-poll frame.