Patent ID: 9204309
Filing Date: 2015-12-01
Classification: H04J,H04W

Abstract:
1. A method for wireless spectrum sharing, the method comprising: broadcasting a primary signal from a primary transmitter using a primary wireless spectrum assigned to a primary communication system; transmitting a secondary signal from a secondary transmitter to a secondary receiver using the primary wireless spectrum assigned to the primary communication system, wherein the secondary transmitter and the secondary receiver belong to a secondary communication system to which no wireless spectrum is assigned, or to which a secondary wireless spectrum is assigned, wherein the secondary wireless spectrum is distinct from the primary wireless spectrum; wherein transmitting the secondary signal from the secondary transmitter comprises transmitting with a total power P split between power αP used by the secondary transmitter to transmit the primary signal, whereby the primary signal broadcasted by the primary transmitter is amplified, and power (1−α)P used by the secondary transmitter to transmit the secondary signal to the secondary receiver; wherein α is computed by the secondary transmitter to protect the primary signal from quality of service degradation caused by the secondary signal by selecting α such that the power (1−α)P of the secondary signal ensures that an SINR of the primary signal received by a hypothetical primary receiver located near the secondary transmitter exceeds a predetermined SINR threshold.