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Simulcast phase synchronization system

  • US 5,734,985 A
  • Filed: 01/16/1996
  • Issued: 03/31/1998
  • Est. Priority Date: 07/12/1993
  • Status: Expired due to Term
First Claim
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1. A simulcast phase synchronization system comprising:

  • a plurality of base stations connected to mobile stations by means of radio channels;

    a central station which controls the plurality of base stations, said central station comprising;

    means which transmits, to the plurality of base stations, frame synchronization signals for the mobile stations;

    the central station and the plurality of base stations each comprising;

    (i) a reference clock which counts the same time,(ii) means which adjusts, on a basis of time information from the reference clock, transmission timing of paging signals which contain the frame synchronization signals, wherein the means which adjusts comprises;

    (a) means which temporarily stores signals to be transmitted after dividing the signals to be transmitted into frames;

    (b) a table which provides the time information that corresponds to a number of frames; and

    (c) means which, on a basis of the table, selects frames from the temporary storage means in synchronization with the time information, and(iii) means which corrects the reference clock;

    wherein the transmission timing of each frame of said paging signals is preset in the table in each of said base stations.

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