| 摘要 |
PROBLEM TO BE SOLVED: To decrease the number of position registering times by representing the position registering requests given from plural mobile stations moving as a single group via the position registering operation of a base station directed transmitting/receiving device of a mobile object. SOLUTION: A user of a mobile station 27 is getting on a train 9 at a station and is going towards a service area. When the user reaches a specific place after riding on the train 9, the station 27 searches for a control channel that can be received at the highest level, in response to the deterioration in the level of a control channel received from a base station. Meanwhile, a mobile station directed transmitting/receiving device 24 of the train 9 supplies information on a virtual service area into the internal space of the train 9 via a down control channel 25. The station 27 catches the channel 25 which has the highest level among those receivable control channels and regards the device 24 as a virtual base station and performs a position registering operation. |
