Method of determining transmission direction, and a radio system

A radio system comprising at least one base station communicating with terminals within its area, which base station comprises means (232a, 232b, 234) for emitting a radiation pattern extending over the whole cell area and directional radiation patterns covering only part of the cell area, and means (232a, 232b, 234, 220) for transmitting base-station-related information on a common control channel to the terminals, characterized in that

• the base station is arranged to transmit base-station-related information comprising a general part and a beam-specific part, and that
• the base station comprises means (232a, 232b, 234) for using the radiation pattern extending over the whole cell area when transmitting the general part and
• means (232a, 232b, 234) for transmitting each beam-specific part by using a specific directional radiation pattern, and that
• the terminal comprises means (716, 718) for detecting one or more beam-specific parts from the information received from the base station and means (702-706, 718) for transmitting information about the detection result to the base station, and that
• the base station comprises means (218, 234) for deciding, on the basis of the information, which directional radiation pattern to use when communicating with the terminal.