A mobile communications system and communication branch establishing method

摘要

A communications system (10) comprises an exchange station (60); first and second base stations (22,21); first and second control stations (32,31) to wire-communicate with the first and second base stations (22,21), respectively, for relaying data from a mobile station to the exchange station (60); a transmission device (41) to wire-communicate with the first and second base stations (22,21), via a local wired communication branch for relaying data from the mobile directly between the first and second base stations; a third base station (23) not communicating with the transmission device; and a third control station (33) to wire-communicate with the third base station (23) for relaying data from the mobile to the exchange station (60). When a request for adding a radio communication branch through the third base station is generated while the data from the mobile is being relayed via the local wired communication branch, determining whether to reject the request, based on a radio quality parameter between the mobile and the third base station.