Data processing: measuring – calibrating – or testing – Testing system – Signal generation or waveform shaping
Reexamination Certificate
2007-02-27
2007-02-27
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Testing system
Signal generation or waveform shaping
C702S031000, C702S079000, C702S080000, C702S176000, C709S236000, C709S248000, C365S194000
Reexamination Certificate
active
10848468
ABSTRACT:
Performing delay measurement between master and slave devices. The master transmits a delay measuring signal at a fixed timing relative to a synchronous pattern signal in an overhead and transmits a frame signal in which an internal delay time, associated with a frame signal generation, from a delay measurement start timing to a transmission timing of the delay measuring signal is stored in the delay measuring signal as a master offset value. The slave adds an internal delay time associated with a frame signal generation to the master offset value of the frame signal, making a slave offset value and transmits an updated delay measuring signal with the slave offset value. The master calculates a delay time by subtracting the slave offset value from a time difference between a timing at which the delay measuring signal transmitted from the slave is received and the delay measurement start timing.
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Hamada Mitsunori
Sunden Hironobu
Fujitsu Limited
Hoff Marc S.
Huynh Phuong
Katten Muchin & Rosenman LLP
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