Method and apparatus for link check in passive optical network

An apparatus for link check in a Passive Optical Network (PON), comprising a processor, wherein the processor is configured to be capable of executing instructions to perform steps comprising:

• establishing Maintenance End Points (MEPs) respectively at an Optical Line Terminal (OLT) interface of an OLT and at network interfaces of a plurality of gateways to form an access Operation, Administration and Maintenance (OAM) domain, the gateway is connected to an Optical Network Unit (ONU), and the ONU is connected to the OLT through Optical Distribution Network (ODN);
• and in the access OAM domain, sending an Ethernet OAM message between the MEP of the OLT and an MEP of a corresponding gateway to test continuity of a service link between the OLT interface of the OLT and the corresponding gateway wherein the processor is configured to be capable of executing instructions to perform steps further comprising:
• enabling an Ethernet OAM function for the OLT on a network management platform to trigger a loop check command from the OLT to the corresponding gateway;
• the OLT sending a loop check message from the OLT interface to the MEP of the corresponding gateway through the MEP of the OLT according to the loop check command;
• and when receiving a loop check response message returned by the corresponding gateway, the OLT determining success of link;
• otherwise, the OLT determining a failure of the link and reports a link abnormality warning message to the network management platform
• or in the alternative, wherein the processor is configured to be capable of executing instructions to perform steps further comprising:
• enabling a link automatic continuity check function between the MEP of the OLT and the MEP of the corresponding gateway;
• the OLT and the corresponding gateway respectively sending a continuity check message to each other between the MEP of the OLT and the MEP of the corresponding gateway through a corresponding port;
• if the OLT fails to receive the continuity check message from the corresponding gateway or if the OLT fails to receive a loop check response message from the corresponding gateway within a predetermined time, then a failure of link is determined, and a link abnormality warning message is reported to a network management platform;
• otherwise, a success of the link is determined.