Abstract: A mobile communication system comprises a mobile station for transmitting packet data. A number of base stations receive the packet data and produce received packet data, respectively. A mobile exchange simultaneously receives a number of received packet data from the base stations and comprises a data quality decision unit for deciding quality of each received packet data to produce a decision result. The data quality decision unit produces an error detection signal when all the received packet data have the frame error. A data selecting unit selects one received packet data having the best quality of these received packet data according to the decision result and produces it as selected packet data. A packet data reproducing unit carries out a predetermined data reproduction operation to reproduce packet data out of a number of the received packet data and supplies it to the data selecting unit as reproduced packet data.

Abstract: In a cellular communication system where mobile telephone switching offices (MTSO) are connected to an ISDN, traffic data is sent from each MTSO at intervals to cell-site base stations via ISDN, indicating a volume of calls received during a predetermined time interval by the MTSO from the base stations and a volume of calls transmitted from the MTSO to the base stations during the same time interval. Each base station analyzes the transmitted traffic data to produce percentage values representing the capacities of the MTSOs for receiving calls from the base stations. When the base station receives a call from a mobile station, it generates a routing code according to the percentage values, and transmits it with the destination address of the call to the ISDN, where it is translated so that the call is routed to one of the mobile switching systems identified by the routing code.