Patent ID: 9014105
Filing Date: 2015-04-21
Classification: H04L,H04W

Abstract:
1. A method for negotiating an idle subchannel set for a wireless data transmission, the method comprising: concurrently transmitting, by a TXOP (transmission opportunity) holder, a plurality of replicate RTS (ready-to-send) frames indicating a first set of idle subchannels to a TXOP responder; receiving, from the TXOP responder, a plurality of replicate CTS (clear-to-send) frames indicating a second set of idle subchannels; and determining a final set of idle subchannels based on the indication of the first set of idle subchannels and the indication of the second set of idle subchannels, wherein an idle channel comprises an IEEE 802.11ac channel, wherein each of the replicate RTS frames is transmitted on a different 802.11 legacy channel, and wherein an IEEE 802.11 legacy station, upon detection of at least one of the replicate RTS frames and at least one of the replicate CTS frames, counts down a timer on one of the IEEE 802.11 legacy channels.