Network system, network terminal, and method for specifying location of failure in network system
US6680903B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1999 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jul 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/437
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a network of a topology of a loop and a bus, occurrence of a failure is detected and a location of the failure is specified. Occurrence of the failure is detected by detecting that a specific signal pattern to be received at regular time intervals within a fixed time period is not received. A node which has detected occurrence of the failure transmits or receives a specifying signal among the nodes, and decide whether or not the failure has occurred adjacently to itself. A packet indicating a decided location of the failure is transmitted or received among nodes, and thereby respective nodes specify the location of the failure. When the failure has occurred at the master node, a node having a smallest node ID after waiting time according to the node ID operates as the alternative master node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.