| 摘要 |
PURPOSE:To make communication for a mobile station efficient by calling a registered mobile station from the central station by a signal peculiar to the mobile station and by calling a mobile station, which appears newly, by a common signal and by registering the mobile station which responds to the common signal. CONSTITUTION:The central station calls mobile stations A-D, whose existing positions are grasped by the central station, in a previously determined or registering order by mobile station numbers #A, #B and #C respectively and calls mobile stations by common number #X for every fixed-number calls during calling above. When mobile station N which appears newly sends response signal N in response to common number #X, mobile station N is registered, and the central station calls it by station number #N and calls next it by mobile station number #D. At this time, in respect to the call number, a BCD code is used as the station number, and the binary display is used as the common number, and respective mobile stations can receive the number given to themselves and the common number under the same condition when they are not registered yet. As a result, the central station can communicate with plural mobile stations most efficiently at a normal time and can communicate with them without damage of transmission efficiency even at an abnormal time. |
