Hybrid fiber coaxial (HFC) network fault locating method, apparatus, and system

A hybrid fiber coaxial (HFC) network fault locating apparatus, comprising:

• an input apparatus;
• a processor;
• a memory configured to store a program and data;
• and
• a communications bus configured to establish connection and communication between the processor, the memory, and the input apparatus;
• wherein the processor is configured to invoke the program stored in the memory to:
• obtain a fault group in an HFC network, wherein the fault group comprises at least one fault point,
• control the input apparatus to collect a pre-equalization coefficient of at least one cable modem (CM), to obtain a first pre-equalization coefficient set, wherein the pre-equalization coefficient of the at least one CM changes after the fault group emerges,
• enable a reference fault point that corresponds to the fault group and whose location is known, wherein the reference fault point comprises an impedance mismatch point that changes the pre-equalization coefficient of the at least one CM,
• control the input apparatus to collect the pre-equalization coefficient of the at least one CM again, to obtain a second pre-equalization coefficient set,
• calculate a relative distance between every two fault points of the fault group according to the first pre-equalization coefficient set, to obtain a first relative distance set,
• calculate a relative distance between every two fault points of a fault point set according to the second pre-equalization coefficient set, to obtain a second relative distance set, wherein the fault point set comprises the fault group and the reference fault point, and
• determine a relative distance between each fault point of the fault group and the reference fault point according to the first relative distance set and the second relative distance set.