The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Jun. 07, 2000
Jürgen Enssle, Fellbach, DE;
Hardy Halbauer, Ettlingen, DE;
Jürgen Otterbach, Stuttgart, DE;
Alcatel, Paris, FR;
Abstract
A master clock signal generated at the center ( ) of a bidirectional point-to-multipoint network is transmitted in the form of time stamps in an MPEG-2 data format over the downstream channel of the network to a plurality of transmitting/receiving facilities ( ). Each transmitting/receiving facility ( ) derives the clock signal for the upstream channel from the master clock signal and a local clock signal generated by a reference clock ( ). The center ( ) compares the clock signal from each transmitting/receiving facility with the master clock signal and derives from the result of this comparison digital phase correction information individual to each transmitting/receiving facility ( ), which it transmits to the respective transmitting/receiving facility ( ) in the MPEG-2 data stream. The respective transmitting/receiving facility ( ) uses the phase correction information to control the clock signal for the upstream channel in a numerically controlled oscillator ( ).