PURPOSE: To reduce the number of times of position registration attended with the movement of a mobile equipment by providing a simultaneous calling function to plural mobile communication exchanges in a position registration area of a mobile equipment to a home memory station and connecting a call to the mobile station.
CONSTITUTION: When a mobile equipment 11 making position registration under the control of a radio base station 1 moves under the control of a radio base station 3, since the mobile equipment 11 stays in a position registration area 23, new position registration is not implemented. When a call comes from other network 24 to the mobile equipment 11, a home memory station 10 receiving an inquiry of routing information from a gate exchange 9 sends a simultaneous call instruction to mobile communication exchange stations 5, 6 to apply simultaneous calling to the mobile equipment 11 from radio base stations 1-4. As a result, since a routing number up to the mobile communication exchange station 6 within the coverage of which the mobile equipment 11 stays is obtained, the line is set from the gate exchange 9 to the mobile communication exchange station 6. Thus, even when the traffic density of the mobile communication exchange station is increased, the number of times of position registration is decreased.
SUZUKI SHIGEFUSA
YOSHIMURA SHUICHI
NAKAJIMA AKIHISA
