Patent ID: 9198142
Filing Date: 2015-11-24
Classification: H04W

Abstract:
1. A method of transmitting data in a frame, the method comprising: sensing during a sensing block of the frame whether a frequency band is idle or busy; deriving, by an unlicensed user device, a probability of interference for a plurality of periods of an inter-sensing block of the frame in accordance with an idle-to-busy transition rate of the frequency band, wherein the idle-to-busy transition rate specifies an average number of periods required for licensed users to transition from an idle state to a busy state when performing licensed transitions over the frequency band; performing, by the unlicensed user device, an unlicensed transmission in the inter-sensing block of the frame; and reducing, by the unlicensed user device, a transmit power level of the unlicensed transmission across later time periods of the inter-sensing block in the frame in accordance with the probability of interference for the later time periods to reduce the probability of the unlicensed transmission in the frame disrupting reception of a licensed communication signal in a subsequent frame, wherein the probability of interference for a given period of the frame corresponds to a likelihood that the unlicensed transmission of the unlicensed user device during the given period of the frame will interfere with reception of the licensed communication signal in the subsequent frame, and wherein deriving the probability of interference for a plurality of periods of an inter-sensing block of the frame comprises determining the probability of interference in accordance with the following equation: P