| 摘要 |
A method and apparatus for providing command and control of remote systems using low earth orbit satellite communications is disclosed. According to the present invention, a programmable transceiver apparatus provides a two-way communications path between a remote user and a control center via a low earth orbit satellite at frequencies below 1 GHz. The transceiver apparatus includes a transceiver for communicating with the low earth orbit satellite; an antenna coupled to the transceiver; at least one interface communicating signals between at least one external device located at the remote user, wherein the transceiver apparatus is programmed to transmit data related to the external device to the satellite in response to a signal communicated to the transceiver via the low earth orbit satellite, an internal program of the transceiver or an alarm or exception signal generated by any of the external devices or the user. According to another embodiment of the present invention, the command signals from the control center are embedded in an information signal of a direct-to-home subscription information system signal via a geostationary satellite operating at frequencies greater than 1 GHz, and are separated at the user location and communicated to the programmable transceiver. The transceiver, in turn, selectively communicates the command signal to the devices and receives data from the devices. The received data is then transmitted to the control center via a low earth orbit satellite.
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