Abstract: The invention relates to a mobile communication system including mobile stations comprising transmission means for sending data over the radio path, at least one mobile exchange, and base stations having a data transmission connection with the mobile exchange, traffic channels being allocated to be used by transceiver units of the base stations for providing calls to the mobile stations, the base stations also comprising means for receiving the data sent by the mobile stations over the radio path and for forwarding said data to other parts of the system. In order for the mobile stations to be able to send data more efficiently, at least one predetermined data channel is allocated for the mobile stations to send data.

Abstract: A signalling method for a radio system, including a plurality of base stations (BS1, BS2, BS3) and remote radio stations (MS1, MS2, MS3), in which a frequency channel serves as a time-shared control channel common to a plurality of base stations for transmitting messages. The base station (BS1, BS2, BS3), when having queuing messages, transmits the messages in the transmission time slot assigned to it on the time-shared control channel in the following order: a) the remaining messages of unfinished call set-up transactions initiated in the preceding transmission time slot, b) messages critical to the call set-up transaction and requiring an acknowledgement from the remote station, and c) messages requiring no acknowledgement from the remote station.