Access management method, communications apparatus, and monitor and control system
US6665267B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Sep 13, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides to an access management method and the communications apparatus capable of limiting an access from a monitor and control apparatus to a communications apparatus. In each of transmission apparatuses N1 to Nm, identification information of a monitor and control apparatus requesting an access is first obtained, and a uniquely determined level for each of monitor and control apparatuses WS1 to WSm is determined. A function of the monitor and control apparatuses requesting an access and its operation type are identified and, after that, it is determined on the basis of a predetermined table whether the access can be permitted or not.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.