Apparatus and method for wireless, remote control of multiple devices
US5886647A · kind A · utility
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transceiver is used to receive remotely-broadcast, radio frequency (rf) signals at a first frequency. The remotely-broadcast rf signals contain encoded, partial control commands as message packets. Each transceiver is adapted to respond only to signals addressed to it. Upon receipt of an intended rf signal, the transceiver decodes and authenticates the signal. If authenticity is established and the decoded signal is recognized as a proper control signal, a new control message packet is generated using information contained in the incoming message packet and information stored in the memory of the internal micro-controller. The new message packet is broadcast using by a low-power rf transmitter tuned to a different frequency that the frequency of the incoming rf signal. A random delay may be introduced between the receipt of the incoming message and the broadcast of the outgoing message to minimize the probability of correlating the output signal with the input signal. Each controlled device within range of the low-power transmitter then receives the new signal, decodes its contents, and responds appropriately to signals intended for the individual device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.