Patent ID: 9055481
Filing Date: 2015-06-09
Classification: H04L,H04W

Abstract:
1. A method, implemented in a communication device, for detecting a duplicate packet in a signal, the method comprising; receiving the signal at the communication device; performing, in the communication device and for each of a plurality of frequency bands, a carrier sense (CS) operation on the received signal, wherein performing a CS operation includes performing a respective autocorrelation on the received signal in a respective one of the plurality of frequency bands; performing, in the communication device and for each of the plurality of frequency bands, a clear channel assessment (CCA) operation on the received signal, wherein performing a CCA operation on the received signal includes measuring a respective amount of energy in a respective one of the plurality of frequency bands; and determining, in the communication device, whether the received signal corresponds to a packet duplicated in each of the plurality of frequency bands based on (i) the CS operations, and (ii) the CCA operations.