Packet or passive optical network system with protection switching capabilities
AssigneeElectronics and Telecommunications Research Institute
InventorTae Whan YOO
Life of this patent
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Abstract
A packet or passive optical network system with packet-based protection switching capabilities is provided. The system performs comprehensive protection switching against failures in all segments of a passive optical network (PON), thereby implementing lossless protection switching against failures in any segment in a packet network and against failures in any segment of the PON that consists of optical line terminals (OLTs), optical cables, optical network units (ONUs) of a PON system.
Claims15
A packet or passive optical network system with a packet-based protection switching capability, comprising:
- a transmitter terminal;
- a plurality of packet paths;
- and
- a receiver terminal,
- wherein the receiver terminal receives a packet that arrives first among identical packets transferred through the plurality of packet paths and discards packets that arrive after the first packet.
A packet or passive optical network system with a packet-based protection switching capability, comprising:
- a packet-path-based protection switching receiver terminal capable of autonomous failure detection and lossless protection switching without correlation with a transmitter terminal and configured to:
- set one packet path as a working channel, among a plurality of packet paths through which identical packets are transferred;
- set remaining packet paths as auxiliary channels;
- normally receive a packet that is transferred through the working channel;
- and store packets that are transferred through the auxiliary channels only and not through the working channel, so that the packets can be normally received after protection switching, whereby when a failure occurs in the working channel, a packet loss is prevented during protection switching from the working channel to one of the auxiliary channels.
A packet or passive optical network system with a packet-based protection switching capability for performing 2:N comprehensive packet-based protection switching in a passive optical network, the packet or passive optical network comprising:
- an optical line terminal (OLT) transmitter comprising a 2:N comprehensive packet-based protection switching master transceiver terminal between a PON-Bridge module and a PON-MAC module and a transmission path switch for selecting one out of two or more optical transmitters as an output;
- and
- an OLT receiver configured to enable packet-based or packet-path-based protection switching by receiving all signals incoming through two or more optical transmitters and connecting the signals to each of receivers of a PON-MAC module to receive signals from all channels.
Dependencies are inferred from the claim text.