Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network
US7525982B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jul 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0652
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
One embodiment of the present invention provides a method for facilitating asymmetric line rates in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system provides a downstream code-group clock, wherein each cycle thereof corresponds to a code group transmitted from the central node to a remote node. The system also provides an upstream code-group clock, wherein each cycle thereof corresponds to a code group received at the central node from a remote node. In addition, the system provides a multi-point control protocol (MPCP) clock, wherein the frequency ratio of the MPCP clock to the downstream code-group clock is different from the frequency ratio of the MPCP clock to the upstream code-group clock, thereby allowing the downstream transmission to be performed at a faster line rate than the upstream transmission line rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.