Early warning fault identification and isolation system for a two-way cable network
US7594252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2005 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Jan 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0659
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Set top boxes (STBs) connected to the HFC cable network are “pinged” and their responses recorded. The two most responsive STBs in each node of the HFC cable network are identified. The most responsive STB is added to a primary ping list and the next most responsive STB is added to a secondary ping list. The STBs on the primary list are “pinged” and their responses recorded. If an STB on the primary list fails to respond, the secondary STB associated with the node is pinged. If both the primary and secondary STB associated with a node fail to respond to the “ping,” the node is identified as non-responsive. If all of the nodes associated with a modulator (or a demodulator) are identified as non-responsive, the modulator (or demodulator) is identified as “non-responsive.” Additionally, network devices are pinged and their responses noted. Using the responsiveness of nodes and network devices, faults in segments in an HFC cable network can be identified and located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.