Title:
SYNCHRONIZATION AND RANGING IN A SWITCHING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/163130
Kind Code:
A3
Abstract:
A system and method for measuring propagation delays and other delays in an optical switching system. A transmitter is connected, through a circuit switch, to a receiver. To measure the propagation delay between the transmitter and the receiver, the transmitter sends one or more time-tagged ranging messages and the receiver calculates a propagation delay from the difference between the time of receipt and the time of transmission. In another embodiment, a time delay between message transmission and transition of a CDR of the receiver to a fast acquisition mode is adjusted, by trial and error, to find a range of such time delays for which transmission is successful. A time delay between the transmitter and the switch is measured by establishing or breaking the connection and determining, for various tentative time delay values, whether transmission succeeds.
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Inventors:
REGEV GUY (US)
BRUNINA DANIEL (US)
FARRINGTON NATHAN (US)
SCHRANS THOMAS PIERRE (US)
YEH CHIANG (US)
BRUNINA DANIEL (US)
FARRINGTON NATHAN (US)
SCHRANS THOMAS PIERRE (US)
YEH CHIANG (US)
Application Number:
PCT/IB2017/000382
Publication Date:
October 26, 2017
Filing Date:
March 22, 2017
Export Citation:
Assignee:
ROCKLEY PHOTONICS LTD (GB)
International Classes:
H04L12/26; H04J3/06; H04Q11/00
Domestic Patent References:
| WO1997004564A1 | 1997-02-06 |
Foreign References:
| US20080019282A1 | 2008-01-24 |
Attorney, Agent or Firm:
MEWBURN ELLIS LLP et al. (GB)
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