Method and system for protection switching in Ethernet passive optical networks

Abstract

One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and / or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

Description

technical field

[0001] The invention relates to the design of the Ethernet passive optical network, more precisely, relates to a design of protection switching of the Ethernet passive optical network. Background technique

[0002] In order to keep up with the increasing pace of Internet traffic, network operators have extensively used optical fibers and optical transmission equipment, which significantly increases the capacity of backbone networks. However, the corresponding increase in access network capacity cannot meet the growth needs of the backbone network capacity. Although broadband solutions such as digital subscriber line (DSL) and cable modem (cable modem, CM) are used, the limited bandwidth provided by current access networks is still a serious problem for end-user high bandwidth transmission. the bottleneck.

[0003] Among different competing technologies, Ethernet passive optical networks (EPON) is one of the best candidates in the next generation access netw...

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