Optical network system and device, and method for controlling optical network and device
US7536109B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jan 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
When entering an idling state, a master unit M transmits an optical signal for polling addressed to each slave unit S-1 to S-n. The slave unit S-n located at the lowest rank of a direct chain constituted by S-1 to S-n, when receiving the optical signal for polling for the self unit, responds by transmitting an optical signal representing a phase correction request signal to the other slave units. The slave units S-1 to S-(n−1) respond to the phase correction request signal, and initialize each clock signal to synchronize with the clock signal of the slave unit S-n at the lowest rank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.