High throughput embedded code hopping system with bypass mode
US5798711A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1995 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jun 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0074
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for monitoring and controlling an area comprising a controller for controlling system operational functions; at least one remote control transmitter for transmitting at least one system command to said controller in a code word having a fixed word and a hopping word therein; the fixed word having an identification code for selective control of the controller, the identification code programmed therein, and a channel code for issuing high and low security commands to the controller; a hopping algorithm for modifying the hopping code of the transmitter n-times in response to n-times activation of said transmitter and for modifying the hopping word m-times within the controller upon receipt of the code word m-times from said transmitter; and, a bypass mode for bypassing the code hopping algorithm and for controlling system functions in response to the controller receiving the low security command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.