Methods and devices for wavelength alignment in WDM-PON
US8649681B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2009 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Mar 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0235
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical network unit for a passive optical network (10), configured to: initiate an upstream wavelength (wus) for an upstream signal (US) from the optical network unit to an optical line terminal (10); iteratively, until an iteration criterion is met, i) transmit the upstream signal (US) to the optical line terminal (10), ii) receive from the optical line terminal (10) power level data (p) for the upstream signal (US) as measured by the optical line terminal (10), and iii) set the upstream wavelength (wus) for the upstream signal (US) to a new wavelength-value; and adjust the upstream wavelength (wus) to a wavelength-value previously set for the upstream signal (US) and associated with power level data corresponding to a certain power level. A passive optical network system, the optical line terminal and related methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.