Patent · US Expired

Arrangement for synchronization of nodes in VDSL-systems

US6731707B1 · kind B1 · utility

5Cited by

3References

15Claims

0Family size

Assignee

STMICROELECTRONICS N.V. · NL

Inventors

Sven-Rune Olofsson · Älvsbyn, SE
Joachim Johansson · Älvsbyn, SE
Mikael Isaksson · Luleå, SE
Hans Ohman · Luleå, SE
Daniel Bengtsson · Luleå, SE
Lennart Olsson · Luleå, SE
Anders Isaksson · Luleå, SE
Goran Okvist · Luleå, SE
Lis-Mari Ljunggren · Älvsbyn, SE
Hans Lundberg · Luleå, SE
Tomas Stefansson · Luleå, SE
Gunnar Bahlenberg · Luleå, SE
Sivert Håkansson · Järfälla, SE
Magnus Johansson · Luleå, SE

Key dates

Filing date	Aug 24, 2000
Grant date	May 4, 2004
Priority date	—
Expiry date	Aug 24, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH04J3/0644
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.