Interference control in shared bands

摘要

Terrestrial mobile wireless network capacity may be maximized subject to an interference constraint imposed by a protected station of another wireless network in a shared band. Equipment of one or more users (UEs) may receive a calibrated beacon signal from the protected station prior to activating a transmitter of one or more wireless UEs. The one or more UEs may measure an isolation (path loss) value between the one or more UEs and protected station using the beacon signal, and dynamically adjust the transmit power of one or more wireless UEs to maintain aggregate interference received by the protected station below an “acceptable” value. The transmit power may be adjusted based on the measured isolation and based on the indicated receive activity, such that the wireless network may operate with no interference constraints imposed by the protected station when a non-active state is indicated.

主权项

1. A process, comprising:
estimating, by user equipment of a secondary wireless network, a path loss and isolation between the user equipment and a protected station of a primary wireless network prior to activating the user equipment in a shared band, wherein the protected station comprises an Earth Station with a downlink signal that is protected from interference from user equipment that causes radio frequency interference, wherein the estimating of the path loss and isolation is based on a power measurement of a calibrated beacon signal received by the user equipment from the protected station holding primary status, and wherein the calibrated beacon signal is periodically measured at the protected station and the measurement traced to national standards and wherein the signal is received from the protected station via a separate channel, the separate channel is separate from a frequency band transmitted by the user equipment and separate from the frequency band received by the protected station; and adjusting power, by the user equipment, to prevent violation of an acceptable level of aggregate interference with the protected station in the shared band, while maximizing an opportunistic network capacity of the secondary wireless network, wherein the aggregate interference is a sum of all user equipment-caused interference powers that are sharing a band or spectrum, the aggregate interference power is that which is received at the protected station, and is calculated at a network operation center based on the path loss received from the user equipment and other network power constraints.