Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network

A line rate, asymmetric technology, applied in the direction of digital transmission systems, electrical components, transmission systems, etc., can solve problems such as the EPON system that has not realized the asymmetric line rate
CN101218792AInactive Publication Date: 2008-07-09TEKNOVUS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TEKNOVUS
Publication Date
2008-07-09
Estimated Expiration
Not applicable · inactive patent

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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.
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Description

technical field

[0001] The invention relates to the design of Ethernet passive optical network. More particularly, the present invention relates to a method and apparatus for achieving asymmetric line rate in an Ethernet passive optical network. Background technique

[0002] To keep pace with the growing Internet traffic, optical fibers and associated optical transmission equipment have been widely deployed, significantly increasing the capacity of backbone networks. Although this increases the capacity of the backbone network, it does not match the corresponding increase in the capacity of the access network. Even with broadband solutions such as Digital Subscriber Line (DSL) and Cable Modem (CM), the limited bandwidth provided by current access networks creates a severe bottleneck in delivering high bandwidth to end users.

[0003] Among the different technologies currently being developed, Ethernet Passive Optical Network (EPON) is one of the best candidate technologies...

Claims

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