The technology applies to a cellular radio communication system in which a mobile radio terminal transmits information in transmission time intervals (TTIs) that is received by a serving base station and by one or more non-serving base stations. A number N of hybrid automatic repeat request (HARQ) transmissions transmitted together by the mobile terminal is determined. An HARQ transmission includes a first transmission, one or more retransmissions of the first transmission, or both. An indication of the number N of HARQ transmissions is provided either directly or indirectly to the one or more non-serving base stations so that the one or more non-serving base stations can take the number N into account when combining HARQ transmissions received from the mobile terminal.