Switching and routing protocol for a fiber optic transmission system

摘要

A system for transporting a plurality of analog and/or digital signals over an optical fiber can include one or more master modems for modulating digital signals and/or RF inserters modulating video signals. The RF signals from the modem(s)/RF inserters are up-converted resulting in frequency bands that are non-overlapping and are spaced apart within a single sub-octave. The sub-octave signal is then converted into an optical signal and directed onto an end of an optical fiber. At the downstream end of the optical fiber, the received optical signal is converted to an RF signal at an optical receiver. The RF signal is then filtered, down-converted and directed to a selected coaxial distribution unit. From the coaxial distribution unit, the RF signal is demodulated, e.g. at a slave modem, to recover the initial analog and/or digital signal.

主权项

1. A system for transporting a plurality of digital data signals, the system comprising:
at least one RF inserter receiving a video signal and outputting an RF signal; at least one master modem outputting a signal modulated with at least one digital signal; an up-convertor system operating on RF signals downstream of an RF inserter and a master modem to output an RF signal having a frequency bandwidth within a single sub-octave; an optical transmitter converting a single sub-octave RF signal downstream of the up-convertor system into an optical signal and directing the optical signal into an optical fiber; an optical receiver downstream of the optical fiber converting the optical signal to an RF signal; a down-convertor system receiving an RF signal downstream of the optical receiver and outputting an RF signal having the video signal encoded thereon; and a slave modem receiving an RF signal having at least one digital signal encoded thereon downstream of the down-convertor system and outputting at least one digital signal, the slave modem configured to delay transmission of an upstream signal to the optical receiver until a transmit notification has been received from a master modem.