Telecommunications – Transmitter and receiver at separate stations
Patent
1995-11-30
1998-09-01
Hudspeth, David R.
Telecommunications
Transmitter and receiver at separate stations
455 132, 3408252, H04M 1100
Patent
active
058024530
ABSTRACT:
In a radio paging system and a radio paging method, in which all transmitters are simply synchronized with each other with a satisfactory precision. A central exchange and each transmitter are each provided with a GPS clock for measuring time according to a current time transmitted from the GPS clock. An encoder of the central exchange adds to a message received from a network a real time, which is information to specify time to send the message from each transmitter, according to the current time measured by the GPS clock thereof and then distributes the message to the transmitters. A synchronizing section of each transmitter sends from a transmitting unit the message distributed from the central exchange to a receiver at a time specified by the real time added to the message according to the current time measured by the GPS clock thereof.
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Kogure Yasuo
Koide Ayumu
Kojima Takafumi
Kuroki Yoshinori
Suzuki Toshiro
Hitachi , Ltd.
Hudspeth David R.
Richardson Scott
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