Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2008-04-15
2008-04-15
Marcelo, Melvin (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S514000
Reexamination Certificate
active
07359408
ABSTRACT:
An apparatus and method for measuring and compensating for delay between a main base station and a remote base station interconnected by an optical cable. The main base station inserts a test pattern into an overhead part of an SDH frame to transmit the SDH frame to the remote base station, receives the SDH frame looped back by the remote base station to detect the test pattern, and measures propagation delay according to the test pattern. At least one frame alignment word (FAW) is detected at a predetermined position in the received SDH frame, and a delay error is calculated according to FAW detection information. The measured propagation delay with the delay error is compensated and produces propagation delay caused by the optical cable. A modulator/demodulator (MODEM) compensates for delay of a baseband signal to be transmitted to the remote base station.
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patent: 6920155 (2005-07-01), Rao
patent: 6975607 (2005-12-01), Sekine et al.
patent: 11177484 (1999-07-01), None
patent: WO 96/13914 (1996-05-01), None
Marcelo Melvin
Roylance Abrams Berdo & Goodman L.L.P.
Samsung Electronics Co,. Ltd.
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