Method and arrangement for interference mitigation

A modularly arranged radio base station comprising a set of confined detection modules, at least one of which is capable of handling multiple user connections, comprising:

• a first subset of detection modules within said radio base station;
• at least a second subset of detection modules within said radio base station comprising at least one interference mitigation capable detection module;
• and
• wherein each of the confined detection modules has one or more distinct user connections assigned to it;
• said first subset of detection modules is adapted to signal interference information concerning its respective user connections to said second subset, and
• said first subset and said second subset are configured to only allow communication of information in one direction;
• said at least one interference mitigation capable detection module is adapted to mitigate interference originating in user connections of said first subset from the user connections of said second subset;
• said at least one interference mitigation capable detection module is adapted to mutually mitigate interference between the connections or a subset of connections within said at least one interference mitigation capable detection module;
• and
• said at least one interference mitigation capable detection module is further adapted to decode all users within said at least one interference cancellation capable detection module.