Differential timing transfer over synchronous ethernet using digital frequency generators and control word signaling

Patent metadata

Field	Value
Publication number	US-9065627-B2
Application number	US-201313873623-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	Nov 10, 2008
Publication date	Jun 23, 2015
Grant date	Jun 23, 2015

Abstract

Transfer of differential timing over a packet network is provided. A transmitting service interface receives a service clock and is coupled to a receiving service interface through a network backplane. A primary reference clock is provided to time the network backplane. The primary reference clock and the service clock are used to synthesize a copy of the service clock connected to the transmitting service interface. A first control word containing an error differential between the service clock and the synthesized copy of the service clock is generated and transmitted through the network backplane via a packet. The first control word, together with the primary reference clock, is used to recreate the service clock for timing the receiving service interface.

First claim

What is claimed is:

1. A system for transferring differential timing over a packet network, the packet network having a network backplane timed by a scaled primary reference clock, the system comprising a receiving service interface communicatively coupled to the network backplane and configured to:
receive, from a transmitting service interface, a first control word, the first control word indicating an error differential between a service clock connected to the transmitting serv…

Assignees

• Rpx Clearinghouse Llc

Inventors

• Aweya James
• Ouellette Michel
• Montuno Delfin Y

Classifications

• G06F1/0328 Primary

  Physics · mapped topic

• H03L2207/50

  Electricity · mapped topic

• H03L7/089

  Electricity · mapped topic

• H04L7/0079 Primary

  Electricity · mapped topic

• H04J3/0632

  Electricity · mapped topic