H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/88
H03K 5/135 (2006.01) H03K 5/15 (2006.01) H04L 7/00 (2006.01)
Patent
CA 1301261
ABSTRACT OF THE DISCLOSURE A method and apparatus of phase synchronizing a plurality of spatially distributed application modules having synchronizing clocks requiring synchronization, each application module being connected, at a predeter- mined site nearest the module, to an outgoing path and, at a corresponding site nearest the module, a return path of a pulse reference path, the method comprising the steps of injecting reference pulsed at a predeter- mined frequency into an injection site of the reference path such that the pulses travel along the outgoing path to a remote site and return to the injection site along the return path; determining, for each application module, the time interval for each pulse to travel from the predetermined site to the corresponding site associated with the application module; monitoring, for each application module, the elapsed time interval for each pulse to travel between the predetermined and corresponding sites associated with the application module; producing, for each application module, a local phase reference signal when the elapsed time interval is one-half a last determined one of the time intervals; and synchronizing the clock of each application module with the local phase reference signal.
565292
Proulx Eugene E.
Telecommunications Research Laboratories
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