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US 12,634,007 B2Granted
Optical network test instrument including testing for optical network unit and optical line terminal assignment
AssigneeViavi Solutions Inc.
InventorsNiki Kirschenmann, Joachim Lönne, Dominik Prause, Olivier Daire
Life of this patent
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Abstract
A test instrument can be coupled to a test point in a passive optical network (PON) to perform an optical network unit (ONU) assignment determination test. The ONU assignment determination test determines a one-to-one assignment of an ONU to an optical line terminal (OLT) in the PON from a downstream signal received during an activation process. The test instrument can capture downstream signals for OLTs of different PONs simultaneously operating on the same optical distribution network to determine ONU assignment for the different PONs in a single test. The test instrument can be a termination mode device.
Claims20
A test instrument connectable between a particular optical line terminal (OLT) and a particular optical network unit (ONU) of a passive optical network (PON) operating on an optical distribution network (ODN), the test instrument comprising:
- a display;
- an optical port to couple the test instrument to a test point on an optical connection in the ODN between the particular OLT and the particular ONU;
- an optical receiver including a power meter to measure a power level of a downstream optical signal received via the optical port, wherein the downstream optical signal is transmitted from the OLT to the ONU;
- a capture circuit coupled to the optical receiver, wherein the capture circuit is to capture ONU information from the downstream optical signal, the ONU information including an OLT identifier of the particular OLT and a serial number of the particular ONU;
- and
- a processor executing an ONU assignment determination test, the processor to:
- display assignment-determination instructions on the display to cause an activation process between the particular ONU and the particular OLT to be invoked, wherein invoking the activation process causes the particular ONU to transmit the serial number of the particular ONU to the particular OLT, and, in response, the particular OLT is to transmit the downstream optical signal that contains the ONU information including the serial number of the particular ONU and the OLT identifier of the particular OLT;
- determine whether a combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured by the capture circuit matches a known assignment of the particular ONU to the particular OLT;
- and
- in response to a determination that the combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured by the capture circuit matches the known assignment of the particular ONU to the particular OLT, display, on the display, an indication that the known assignment of the particular ONU to the particular OLT is found, to indicate that the test instrument is correctly coupled to the optical connection between the particular ONU and the particular OLT.
7 more elements
A test instrument connectable to an optical distribution network (ODN) having a plurality of different types of passive optical networks (PONs) simultaneously operating on the ODN, the test instrument comprising:
- a display;
- an optical port coupling the test instrument to a test point on an optical connection in the ODN between a particular optical line terminal (OLT) and a particular optical network unit (ONU);
- an optical receiver to receive a downstream signal via the optical port, wherein the downstream signal is transmitted from the particular OLT to the particular ONU;
- a capture circuit coupled to the optical receiver, wherein the capture circuit is to capture ONU information from the downstream signal, the ONU information including an OLT identifier of the particular OLT and a serial number of the particular ONU;
- and
- a processor to:
- display instructions on the display to cause an activation process between the particular ONU and the particular OLT to be invoked, wherein invoking the activation process causes the particular ONU to transmit the serial number of the particular ONU to the particular OLT, and, in response, the particular OLT is to transmit to the particular ONU the downstream signal that contains the ONU information including the OLT identifier of the particular OLT and the serial number of the particular ONU;
- determine whether a combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured by the capture circuit matches a known assignment of the particular ONU to the particular OLT;
- and
- in response to a determination that the combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured by the capture circuit matches the known assignment of the particular ONU to the particular OLT, display, on the display, an indication that the known assignment of the particular ONU to the particular OLT is found, to indicate that the test instrument is correctly coupled to the optical connection between the particular ONU and the particular OLT,
- wherein the test instrument is a termination mode device, and the downstream signal received via the optical port is terminated at the test instrument instead of being passed through the test instrument to the particular ONU.
8 more elements
A method of operating a test instrument to determine a one-to-one assignment of a particular optical network unit (ONU) to a particular optical line terminal (OLT) in a passive optical network (PON) operating on an optical distribution network (ODN), the method comprising:
- displaying assignment-determination instructions on a display of the test instrument that has an optical port coupled to a test point on an optical connection between the particular ONU and the particular OLT, wherein the assignment-determination instructions cause an activation process between the particular ONU and the particular OLT to be invoked, and wherein invoking the activation process causes the particular ONU to transmit a serial number of the particular ONU to the particular OLT, and, in response, the particular OLT is to transmit to the particular ONU a downstream optical signal that includes the serial number of the particular ONU and an OLT identifier of the particular OLT;
- receiving, via the optical port of the test instrument connected to the test point, the downstream optical signal transmitted from the particular OLT to the particular ONU, wherein the downstream optical signal received via the optical port of the test instrument is terminated at the test instrument instead of being passed through the test instrument to the particular ONU;
- capturing, by a capture circuit of the test instrument, the serial number of the particular ONU and the OLT identifier of the particular OLT from the downstream optical signal;
- determining, by a processor of the test instrument, whether a combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured from the downstream optical signal matches a known one-to-one assignment of the particular ONU to the particular OLT;
- and
- in response to a determination that the combination of the serial number of the particular ONU and the OLT identifier of the particular OLT captured from the downstream optical signal matches the known one-to-one assignment of the particular ONU to the particular OLT, displaying, on the display of the test instrument, an indication that the known one-to-one assignment of the particular ONU to the particular OLT is found, to indicate that the test instrument is correctly coupled to the optical connection between the particular ONU and the particular OLT.
3 more elements
Dependencies are inferred from the claim text.