Patent ID: 8594000

Claim:
A method in a radio base station of a cellular communications system for controlling self-interference, wherein the radio base station communicates with a user equipment using multiple uplink and multiple downlink carriers, the method comprising: detecting a degraded downlink performance on at least one of said multiple downlink carriers due to self-interference by determining that a set of predefined conditions applies, wherein said set of predefined conditions includes the following conditions: a duplex distance below a predetermined first threshold, and channel quality indicators associated with the downlink carrier closest to the uplink carriers systematically indicate degraded performance due to self-interference; and executing, in response to detection of the degraded downlink performance, an action to reduce self-interference between the uplink and downlink carriers, wherein said action comprises one of: uplink scheduling to reduce self-interference, deactivation of a secondary uplink carrier, deactivation of a secondary downlink carrier, and initiation of carrier reconfiguration to reduce self-interference.