Communication method, packet radio system, controller and user terminal

A communication method, a packet radio system, a controller and a user terminal. The packet radio system includes a controller (146), a user terminal (170) and more than one base stations (142, 144) communicating with the controller and a user terminal of the packet radio system. A processing unit (226) of the controller is further configured to define a subset of an active set of soft handover on the basis of performances of base stations in the active set, and to provide information on which base stations are included in the defined subset, and the processing unit (220) of the user terminal is further configured to monitor HARQ information only from the base stations that are included in the defined subset.