Patent ID: 9521557
Filing Date: 2016-12-13
CPC Classification: H04L,H04W

Claim Text:
1. A method in a wireless communications system including a first primary channel having a first frequency spectrum and a second primary channel having a second frequency spectrum, wherein the second frequency spectrum includes the first frequency spectrum, comprising: performing, by a wireless device, a first and a second back-off procedure at least partially in parallel, each of the first and second back-off procedures conditionally update separate counters over individual periods of time when the first or second primary channels are idle respectively, conditionally reset the separate counters over the individual periods of time when the first or second primary channels are busy respectively, wherein the first and second back-off procedures are each complete when their respective counters reach a respective predetermined threshold value, wherein the second primary channel is not idle when the first primary channel is not idle; transmitting a wireless message over the first primary channel in response to the first back-off procedure completing before the second back-off procedure; and transmitting the wireless message over the second primary channel in response to the second back-off procedure completing before the first back-off procedure.