Uplink interference management in shared spectrum networks

A network control system configured to manage radio communications devices for a Spectrum Access System (SAS) shared spectrum wireless network, the network control system comprising:

• a receiver to receive initial measurements from a plurality of user terminals and determine an estimate of a proximity to a Priority Access License (PAL) radio communication device for the plurality of user terminals and an estimate of a proximity to a General Authorized Access (GAA) radio communication device for the plurality of user terminals;
• and
• a processor, operably coupled to the receiver, configured to cause a user terminal to be configured to perform interference measurements based on the estimate of the proximity to the PAL radio communication device and the estimate of the proximity to the GAA radio communication device,
• wherein the estimate of the proximity to the PAL radio communication device is based on ranking the plurality of user terminals based on their respective initial measurements of signals transmitted by the PAL radio communication device.