Radio base station system and central control station with unified transmission format
First Claim
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1. A central control station, which controls radio base stations connected thereto via radio links and optical fiber links, comprising:
- a demultiplexing unit which demultiplexes signals supplied from an upper-level station;
signal conversion units which convert the respective demultiplexed signals into converted signals having a unified transmission format; and
a distribution unit which distributes the converted signals to the radio links and the optical fiber links.
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Abstract
A central control station, which controls radio base stations connected thereto via radio links and optical fiber links, includes a demultiplexing unit which demultiplexes signals supplied from an upper-level station, signal conversion units which convert the respective demultiplexed signals into converted signals having a unified transmission format, and a distribution unit which distributes the converted signals to the radio links and the optical fiber links.
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Citations
10 Claims
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1. A central control station, which controls radio base stations connected thereto via radio links and optical fiber links, comprising:
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a demultiplexing unit which demultiplexes signals supplied from an upper-level station;
signal conversion units which convert the respective demultiplexed signals into converted signals having a unified transmission format; and
a distribution unit which distributes the converted signals to the radio links and the optical fiber links. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of processing signals in a control station which controls radio base stations connected thereto via radio links and optical fiber links, comprising the steps of:
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demultiplexing signals supplied from an upper-level station;
converting the demultiplexed signals into converted signals having a unified transmission format; and
distributing the converted signals to the radio links and the optical fiber links.
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8. A radio-base-station system, comprising:
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a plurality of radio base stations; and
a central control station controlling said radio base stations and connected to some of said radio base stations directly via optical fibers, wherein one of said radio base stations includes a radio frequency conversion unit configured to convert an intermediate frequency signal into a radio frequency signal and a radio transmission unit configured to transmit the radio frequency signal to another one of said radio base stations, whereby said one of said radio base stations receives a signal having an intermediate frequency from the central control station, and transmits the signal received from the central control station to said another one of said radio base stations.
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9. A radio-base-station system, comprising:
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a plurality of radio base stations; and
a central control station controlling said radio base stations and connected to some of said radio base stations directly via optical fibers, wherein one of said radio base stations includes a radio transmission unit configured to transmit a radio frequency signal to another one of said radio base stations, whereby said one of said radio base stations receives a signal having a radio frequency from the central control station, and transmits the signal received from the central control station to said another one of said radio base stations.
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10. A radio-base-station system, comprising:
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a plurality of radio base stations; and
a central control station controlling said radio base stations and connected to some of said radio base stations directly via optical fibers, wherein one of said radio base stations includes a digital-to-analog conversion unit configured to convert a base-band signal into an analog signal, a radio frequency conversion unit configured to convert the analog signal into a radio frequency signal, and a radio transmission unit configured to transmit the radio frequency signal to another one of said radio base stations, whereby said one of said radio base stations receives a signal as a digital signal from the central control station, and transmits the signal received from the central control station to said another one of said radio base stations.
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Specification