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Radio-signal-data-transmission-synchronization

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Radio signal data transmission synchronization

Details

Inventors: Collar, James K.; Gaskill, Garold B.; Park, Daniel J.; Shanks, Carl D.; Wells, Rick T.;
Assignee: Seiko Corp. (both of, JP); Seiko Epson Corp. (both of, JP)
Primary Examiner: Yusko; Donald J.
Assistant Examiner: Weissman; Peter
Attorney, Agent or Firm: Galbi; Elmer

Real time synchronization of radio signal data is achieved by a feedback loop between a clearinghouse generating data and a radio station transmitting data. Transmission time is adjusted in response to detected timing errors by selectively inserting padding data between certain data packets to shift data packet position within a data stream transmitted at a predetermined transmission rate. Data flow control is achieved by use of variable length flags delimiting data packets whereby longer flags result in less data flow and shorter flags result in greater data flow.

DETAILED DESCRIPTION Real time synchronization of radio signal data is achieved in accordance with the present invention by a feedback loop between a clearinghouse generating data and a radio station transmitting data.
Transmission time is adjusted in response to detected timing errors by selectively inserting padding data between certain data packets to shift data packet position within a data stream transmitted at a predetermined transmission rate.
To delay subsequent data packet transmissions, additional padding data is inserted, and to advance transmission time, padding data is removed.
Actual time of transmission is calculated without a time reference at the radio station by detecting a known volume of data in a return verification data path.

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