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:
May. 04, 2004
Filed:
Aug. 24, 2000
Sven-Rune Olofsson, Luleå, SE;
Joachim Johansson, Luleå, SE;
Mikael Isaksson, Luleå, SE;
Hans Öhman, Luleå, SE;
Daniel Bengtsson, Luleå, SE;
Lennart Olsson, Luleå, SE;
Anders Isaksson, Luleå, SE;
Göran Ökvist, Luleå, SE;
Lis-Mari Ljunggren, Luleå, SE;
Hans Lundberg, Luleå, SE;
Tomas Stefansson, Luleå, SE;
Gunnar Bahlenberg, Luleå, SE;
Sivert Håkansson, Järfälla, SE;
Magnus Johansson, Luleå, SE;
STMicroelectronics N.V., Amsterdam, NL;
Abstract
An arrangement for synchronization of nodes in VDSL-systems, or more exactly, synchronization of optical VDSL-nodes which share a common part of a cable in the access network between subscribers and a local station. A time synchronization is provided towards an external system, for instance GPS, which gives a time reference by which the different nodes can be synchronized. The synchronization reduces the near end cross-talk between the VDSL-systems in the different nodes. Preferably, each respective node includes a receiver for a synchronization signal and an internal oscillator with high stability to deliver a stable clock signal.