Method and apparatus for detecting and recovering rogue ONU
AssigneeElectronics and Telecommunications Research Institute
InventorsKwang Ok Kim, Kyeong Hwan Doo, Hwan Seok Chung
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Abstract
A rogue ONU detection and recovery method in a PON network includes steps of: monitoring upstream signals transmitted from a plurality of ONUs to an OLT to acquire LOS signal information and FEC error information; sensing an operation of the rogue ONU in the PON network on the basis of the LOS signal information and the FEC error information; and deactivating at least one of the plurality of ONUs and recovering the rogue ONU to a normal ONU according to whether or not the operation of the rogue ONU is released.
Claims13
A rogue optical network unit (ONU) detection and recovery method in a passive optical network (PON) network, the method comprising steps of:
- monitoring upstream signals transmitted from a plurality of ONUs to an optical line terminal (OLT) to acquire loss-of-signal (LOS) signal information and forward error correction (FEC) error information;
- sensing an operation of the rogue ONU in the PON network on the basis of the LOS signal information and the FEC error information,
- wherein the step of sensing the operation of the rogue ONU includes:
- determining whether or not LOS signals have been generated for all of the plurality of ONUs on the basis of the LOS signal information;
- determining whether or not a number of FEC uncorrectable errors generated for the upstream signal increases on the basis of the FEC error information;
- and
- determining that the operation of the rogue ONU has occurred in the PON network when the LOS signals are generated for all of the plurality of ONUs and the number of FEC uncorrectable errors increases;
- and
- deactivating at least one of the plurality of ONUs and recovering the rogue ONU to a normal ONU according to whether or not the operation of the rogue ONU is released.
A rogue optical network unit (ONU) detection and recovery apparatus comprising:
- a memory configured to store one or more instructions;
- and
- a processor configured to execute the one or more instructions stored in the memory;
- wherein the processor executes the one or more instructions to
- monitor an upstream signals transmitted from a plurality of ONUs to an optical line terminal (OLT) to acquire loss-of-signal (LOS) signal information and forward error correction (FEC) error information;
- sense an operation of a rogue ONU in a passive optical network (PON) network on the basis of the LOS signal information and the FEC error information by:
- determining whether or not LOS signals have been generated for all of the plurality of ONUs on the basis of the LOS signal information;
- determining whether or not a number of FEC uncorrectable errors generated for the upstream signal increases on the basis of the FEC error information;
- and
- determining that the operation of the rogue ONU has occurred in the PON network when the LOS signals are generated for all of the plurality of ONUs and the number of FEC uncorrectable errors increases;
- and
- deactivate at least one of the plurality of ONUs and recover the rogue ONU to a normal ONU.
Dependencies are inferred from the claim text.