Patent ID: 9674825
Date: 2017-06-06
CPC Classifications: H04W

Claim:
1. A method for wireless communications, comprising: performing a clear channel assessment (CCA) at a base station to determine availability of an unlicensed spectrum; transmitting, by the base station, a first waveform having a subframe to a set of user equipments (UEs) over the unlicensed spectrum when a determination is made that the unlicensed spectrum is available, wherein the subframe comprises a first component configured to be readable by a WiFi device and a second component configured to be readable by a cellular device; and receiving responsive to the first waveform, a second waveform, from one or more of the set of UEs, each second waveform being received over the unlicensed spectrum and being configured to indicate that the respective UE has channel access over the unlicensed spectrum to receive data from the base station.