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Method and apparatus using GPS to reshape isochronous data at the receiving ends of an ATM network

  • US 5,896,388 A
  • Filed: 06/10/1997
  • Issued: 04/20/1999
  • Est. Priority Date: 02/13/1995
  • Status: Expired due to Term
First Claim
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1. A system for transmitting data comprising:

  • (a) at least one sending terminal, including a first time clock, for sending a data stream containing a plurality of data segments being represented from data segment (1) to data segment (n), a data segment (i) (i=1, 2, . . . ,n) containing a time signal Tsend (i) (i=1, 2, . . . , n) set by said first time clock for indicating sending time for the data segment (i);

    (b) at least one receiving terminal, including a second time clock, for receiving said data stream including said data segments from said data segment (1) to said data segment (n), said data segment (i) (i=1, 2, . . . , n) being received at time Tdestination (i) set by said second time clock, said first and second time clocks being calibrated by a calibrating time signal wirelessly received from a common source;

    (c) a processor logic, located at said receiving terminal, for generating a constant time offset bias by measuring time delay Tdelay (i) between said time signal Tsend (i) and said Tdestination (i), (i=1, 2, . . . , n); and

    (d) a transmitting circuit for transmitting said data segment (i) (i=1, 2, . . . , n) at the time of said Tsend (i) adjusted by said time constant offset bias.

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