Patent ID: 9713154
Date: 2017-07-18
CPC Classifications: H04L,H04M,H04W

Claim:
1. A method for operating a wireless user equipment (UE) device, the method comprising: establishing a primary cell according to long term evolution (LTE) with a cellular base station on a frequency channel in a licensed frequency band; establishing a secondary cell according to LTE with the cellular base station on a frequency channel in an unlicensed frequency band; receiving an indication of a scheduled LTE downlink communication on the secondary cell from the cellular base station via the primary cell; prior to receiving the scheduled LTE downlink communication, receiving a discovery reference signal (DRS) on the frequency channel in the unlicensed frequency band, wherein the DRS is included in a hybrid Wi-Fi/LTE signal comprising a Wi-Fi preamble and the DRS, wherein the DRS comprises an LTE based signal; performing one or more of cellular timing and frequency tracking for the unlicensed frequency band using the DRS; and receiving the scheduled LTE downlink communication.