OPTICAL REPEATER SYSTEM
First Claim
1. An optical relay system comprising:
- a base station interface unit configured to output radio frequency (RF) signals of multiple bands received from a base station to at least one optical distribution unit and transmit the RF signals of the multiple bands received from the at least one optical distribution unit to the base station according to frequency bands;
the optical distribution unit configured to convert the RF signals received from the base station interface unit into optical signals and transmit the optical signals to at least one remote unit or convert optical signals received from the at least one remote unit into RF signals and output the RF signals; and
the remote unit configured to convert the optical signals received from the optical distribution unit into RF signals of multiple bands, combine the RF signals of the multiple bands and output the combined signal to a mobile terminal or convert an RF signal received from the mobile terminal into optical signals and output the optical signals,wherein the remote unit prevents a signal from being transferred in a reverse direction when the RF signals of the multiple bands are combined.
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Accused Products
Abstract
The present invention relates to an optical relay system that transmits a band-limited multi-band frequency signal via an optical line. According to an embodiment of the present invention, since a remote unit includes a multiplexer that fixes a power flow direction to combine wireless signals of various bands and outputs the combined signals to a mobile terminal, or distributes wireless signals wireless signals received from the mobile terminal and fixes a power flow direction to output the distributed wireless signals, even if frequency bands of signals combined by the multiplexer overlap or are adjacent, power delivery in a direction opposite to the power delivery direction of a signal during a signal combining process can be prevented, reducing signal distortion, and thus improving efficiency in combining a number of signals.
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Citations
9 Claims
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1. An optical relay system comprising:
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a base station interface unit configured to output radio frequency (RF) signals of multiple bands received from a base station to at least one optical distribution unit and transmit the RF signals of the multiple bands received from the at least one optical distribution unit to the base station according to frequency bands; the optical distribution unit configured to convert the RF signals received from the base station interface unit into optical signals and transmit the optical signals to at least one remote unit or convert optical signals received from the at least one remote unit into RF signals and output the RF signals; and the remote unit configured to convert the optical signals received from the optical distribution unit into RF signals of multiple bands, combine the RF signals of the multiple bands and output the combined signal to a mobile terminal or convert an RF signal received from the mobile terminal into optical signals and output the optical signals, wherein the remote unit prevents a signal from being transferred in a reverse direction when the RF signals of the multiple bands are combined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification