Optical switching transmission system with timing correction
US8019228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Oct 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0045
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmission system capable of time difference correction without increasing guard times, thereby improving optical packet transmission efficiency. An optical switching processor sets identical switching timing for input ports thereof such that optical signals input from the input ports are switched at the same timing. During initialization, a time difference corrector transmits an optical dummy packet to an optical switch node, and detects synchroneity of the optical dummy packet returned thereto after being switched by the optical switch node. If synchronization error is detected, the time difference corrector adjusts the output timing of the optical dummy packet so that the timing of arrival of the optical dummy packet at the optical switching processor may coincide with the switching timing of the optical switching processor, to thereby correct the time difference between the switching timing and the arrival timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.