Title:
RADIO CALLING SYSTEM
Document Type and Number:
Japanese Patent JP3250924
Kind Code:
B2
Abstract:
PURPOSE: To easily synchronize all transmitting stations with excellent precision by sending a received message from a transmitter exactly as specified with the time added to the message.
CONSTITUTION: Each transmitting station 2 clocks its current time by adding the delay time required from the transmission of a reference station selected among transmitting stations 2 to the reception of this station to the time received from the reference station. To find the delay time required from the transmission of the reference station to the reception of this station. the reference time clocked at the reference station based on the information on time received from a satellite by radio is sent by radio to the respective transmitting stations 2, each of which clocks current time to be referred to based on the information on time received from the satellite by radio and finds the delay time required from the transmission of the reference station to the reception of the transmitting station 2 from the difference between the reference time sent from the reference time and the time to be referred to at the point of time when the reference time is received.
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Inventors:
Yoshinori Kuroki
Toshiro Suzuki
Ayumu Koide
Kumon Kojima
Yasuo Kinosaki
Toshiro Suzuki
Ayumu Koide
Kumon Kojima
Yasuo Kinosaki
Application Number:
JP29924394A
Publication Date:
January 28, 2002
Filing Date:
December 02, 1994
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G01S19/14; H04W24/04; H04W56/00; H04W92/12; H04W92/20; (IPC1-7): H04Q7/36; G01S5/14; H04Q7/16
Domestic Patent References:
| JP6311088A | ||||
| JP4306924A | ||||
| JP4127722A |
Attorney, Agent or Firm:
Kazuko Tomita
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