Patent ID: 9119186
Filing Date: 2015-08-25
Classification: H04L,H04W

Abstract:
1. A method, in a communication device operating according to a communication protocol, for generating orthogonal frequency division multiplexing (OFDM) signals to be transmitted in a basic service set (BSS) channel, wherein a set of two or more component channels is collectively coextensive with the BSS channel, wherein the communication protocol defines (i) a non-duplicate mode data unit corresponding to a single component channel within the set of two or more component channels and (ii) a non-duplicate mode data unit corresponding to a first set of adjacent component channels within the set of two or more component channels, wherein the non-duplicate mode data unit corresponding to the single component channel has (i) a first number of lower-edge guard tones and (ii) a first number of upper-edge guard tones, wherein the non-duplicate mode data unit corresponding to the first set of adjacent component channels has (i) a second number of lower-edge guard tones and (ii) a second number of upper-edge guard tones, and wherein at least one of (i) the second number of lower-edge guard tones is greater than the first number of lower-edge guard tones or (ii) the second number of upper-edge guard tones is greater than the first number of upper-edge guard tones, the method comprising: determining, at the communication device, that a duplicate mode will be utilized for a first OFDM transmission in the first set of adjacent component channels; and in response to determining that the duplicate mode will be utilized for the first OFDM transmission,