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Paging system its operating method
申请号	EP92300591.2	申请日	1992-01-23	公开(公告)号	EP0496623A3	公开(公告)日	1993-03-17
申请人	NEC CORPORATION;			发明人	Ichikawa, Yoshio, c/o NEC Corporation; Dawkins, Derek, c/o NEC Corporation;
摘要	An improved paging system has functions not only for detecting the omission of message reception but also for acquiring the unreceived message. When a normal paging request call from a public telephone network is made, the paging control unit adds to the value of a message counter (56) of the called subscriber's number and transmits an encoded paging signal which includes the value from the transmitter and further stores the message data in a storage unit (63) corresponding to the value of the counter of the called subscriber's number. A called pager detects the omission of message reception through the received message counter value by comparison with message counter value of the last message signal and displays a message indicating an omission as well as the value of an omitted message. A call can be made to request repeat transmission through a public telephone network, and when the message counter value is specified, the paging control unit retrieves the message data stored in the message data storage unit (63) corresponding to the specified value and transmits the data from the transmitter.
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