Diffused infrared communication control system
US5142396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1990 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Mar 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved control system utilizing infrared communication channels for remote station control is provided. A central base controller communicates with one or more channels of sub-networks through one or more field interface controllers. Each field interface controller utilizes a dedicated base infrared transceiver for transmitting envelopes of definable duration at a preselected infrared oscillation frequency. At least one remote station receives said transmitted infrared signals at an infrared transceiver tuned to said oscillation frequency. Associated devices at the remote station decode the information from said infrared transmission or issue instructions and information to an associated input/output device. Communication over the infrared channel between the base and the remote stations utilizes a unique pulse position protocol. An initiating clear pulse begins all communications. The remote station responds to the time-location of ensuing pulses following the initiating pulse. The time of occurrence of the pulse indicates the appropriate response necessary from the remote station, which station correspondingly sends back infrared pulses in predetermined time slots and requir…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.