Patent ID: 8817717
Filing Date: 2014-08-26
Classification: H04W

Abstract:
1. A method comprising: determining a plurality of frequency domain samples of a radio frequency (RF) signal received at a first communication unit of a wireless communication device, wherein the first communication unit implements a first communication protocol; identifying a subset of the frequency domain samples of the RF signal that correspond to a control channel of a second communication unit of the wireless communication device based, at least in part, on an address of the second communication unit and a communication channel of the first communication unit on which the RF signal is received, wherein the second communication unit implements a second communication protocol and the communication channel of the first communication unit includes at least the control channel; determining an energy measurement associated with the control channel based, at least in part, on the subset of the frequency domain samples of the RF signal; determining whether the control channel includes a narrowband signal based, at least in part, on a narrowband energy threshold; and determining whether the control channel includes a control packet associated with the second communication unit based, at least in part, on comparing the energy measurement associated with the control channel against an energy jump threshold and on whether the control channel includes a narrowband signal.