Patent ID: 9516634
Filing Date: 2016-12-06
CPC Classification: H04W

Claim Text:
1. A method for transmitting data, comprising: operating, by an access point, a random backoff counter associated with a primary frequency channel; transmitting, by the access point, a first data packet over the primary frequency channel to a first station after the random backoff counter expires; determining, by the access point after the random backoff counter expires, whether a secondary frequency channel has been idle for a duration of time based on a time interval before a time that the random backoff counter expired; operating a second random backoff counter associated with the secondary frequency channel; transmitting, by the access point, a second data packet over the secondary frequency channel to a second station if the secondary frequency channel has been idle for the duration of time based on the time interval before the time that the random backoff counter expired and if the second random backoff counter expires before the random backoff counter; transmitting the second data packet over the primary frequency channel if the random backoff counter expires before the second random backoff counter; determining, after the first of the random backoff counter or the second random backoff counter expires, whether a frequency channel associated with a random backoff counter that has not expired has been idle for a duration of time based on a point coordination function inter frame space (PIFS) before a time that the respective random backoff counter expired; and transmitting a data packet corresponding to a random backoff counter that has not expired if the respective frequency channel has been idle for the duration of time based on the PIFS before the time that the respective random backoff counter expired.