Protection of industrial equipment from network storms emanating from a network system
US7689689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Apr 20, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of protecting a networked industrial controller from network storms is disclosed in the specification. The networked industrial controller has a real-time operating system and communication components performing communication exchanges with connected networks. The method comprises steps of:(a) Initializing a watchdog thread monitor thread to have a high priority within the real-time operating system's kernel level;(b) configuring a watchdog thread to periodically (every TAlive time) send an alive event signal to the watchdog thread monitor thread if all other threads of application programs are operating normally;(c) starting the watchdog thread monitor thread waiting for receiving the alive event signal within a timeout period TAliveTout (TAliveTout is longer than TAlive);(d) identifying a network storm in response to the alive event signal; and(e) controlling the communication exchanges in response to the alive event signal and current phase of the watchdog thread monitor thread.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.