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Early warning fault identification and isolation system for a two-way cable network

  • US 7,594,252 B2
  • Filed: 03/01/2005
  • Issued: 09/22/2009
  • Est. Priority Date: 03/01/2005
  • Status: Active Grant
First Claim
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1. A method of determining an operational status of a segment of a hybrid fiber coax (HFC) cable network comprising:

  • accessing a ping datastore to acquire ping data associated with a plurality of set top boxes (STBs) connected to the HFC network through a common node, wherein the ping data comprise for each STB of the plurality of STBs a ratio of a number of ping responses to a number of ping queries;

    selecting from the ping data associated with the plurality of STBs a primary STB, wherein the primary STB has the highest ratio of ping responses to ping queries and wherein the primary STB is associated with a primary STB IP address; and

    selecting from the ping data associated with the plurality of STBs a secondary STB, wherein the secondary STB has the second highest ratio of ping responses to ping queries and wherein the secondary STB is associated with a secondary STB IP address;

    pinging the primary STB IP address;

    determining whether a response from the ping is received from the primary STB;

    when the response from the ping is received from the primary STB, then setting a primary STB operational status of the primary STB to responsive;

    when the response from the ping is not received from the primary STB, pinging the secondary STB IP address;

    determining whether a response from the ping is received from the secondary STB;

    when the response from the ping is received from the secondary STB, then setting a secondary STB operational status of the secondary STB to responsive and setting a node operational status of the common node to responsive;

    when the response from the ping is not received from the secondary STB, then setting the secondary STB operational status of the secondary STB to non-responsive and setting the node operational status of the common node to non-responsive; and

    determining an operational status of a network component upstream from the common node based on the node operational status of all nodes serviced by the upstream network component.

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