The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2009
Filed:
Sep. 16, 2005
Glen Kramer, Petaluma, CA (US);
Edward W. Boyd, Petaluma, CA (US);
Ryan E. Hirth, Windsor, CA (US);
Lawrence D. Davis, Petaluma, CA (US);
Lowell D. Lamb, San Ramon, CA (US);
Glen Kramer, Petaluma, CA (US);
Edward W. Boyd, Petaluma, CA (US);
Ryan E. Hirth, Windsor, CA (US);
Lawrence D. Davis, Petaluma, CA (US);
Lowell D. Lamb, San Ramon, CA (US);
Teknovus, Inc., Petaluma, CA (US);
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.