Traffic driven variable bandwidth optical transmission
US8009985B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2003 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jul 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/1617
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Link bandwidth is varied based on the subscriber traffic load. Varying the link bandwidth has the effect of varying the actual noise margin of the link (in an inverse relation), so that the noise margin will vary inversely with the traffic load. A beneficial result is that, because the noise margin is increased during “off-peak” traffic periods, rapidly varying and burst impairments can be absorbed without causing data loss. In effect, the respective probability distributions of error bursts and traffic load are separated. Data loss only becomes a significant risk when peaks in both distributions coincide. However, the probability of that event occurring is comparatively low. This enables a lower noise margin allocation during design of the link, which dramatically reduces the link cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.