Optical line terminal, passive optical network and radio frequency signal transmission method
First Claim
1. An optical line terminal, comprising:
- at least one transmitting unit, configured to provide an optical network unit (ONU) with one downstream optical carrier and two upstream optical carriers dedicated for the ONU, to modulate a downstream radio frequency signal to the ONU on the downstream optical carrier dedicated for the ONU, to combine the modulated downstream optical carrier with the two upstream optical carriers dedicated for the ONU, and to output a downstream optical signal;
wherein the two upstream optical carriers dedicated for the ONU are configured to carry upstream radio frequency signals of the ONU;
a multiplexing/demultiplexing unit, configured to multiplex through wavelength division downstream optical signals outputted from each of the at least one transmitting unit and to transmit the multiplexed downstream optical signals to an ONU via an optical distribution network (ODN); and
to demultiplex through wavelength division the multiplexed upstream optical wave of each ONU transmitted by an ODN, and output the demultiplexed upstream optical signals; and
at least one receiving unit, configured to obtain an upstream signal from the demultiplexed upstream optical signals.
1 Assignment
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Accused Products
Abstract
An optical line terminal, a passive optical network and a radio frequency signal transmission method in the communication technical field are provided. The passive optical network comprises: an OLT, an ODN and at least one ONU. The OLT comprises: at least one transmitting unit, which provides one dedicated downstream optical carrier and two dedicated upstream optical carriers for ONU; the two dedicated optical carriers for ONU are configured to carry ONU upstream radio frequency signals; a multiplexing/demultiplexing unit; and at least one receiving unit which obtains the upstream signal from the demultiplexed upstream optical signal. The bandwidth of wireless access network is enhanced, and the design of ONU is simple.
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Citations
16 Claims
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1. An optical line terminal, comprising:
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at least one transmitting unit, configured to provide an optical network unit (ONU) with one downstream optical carrier and two upstream optical carriers dedicated for the ONU, to modulate a downstream radio frequency signal to the ONU on the downstream optical carrier dedicated for the ONU, to combine the modulated downstream optical carrier with the two upstream optical carriers dedicated for the ONU, and to output a downstream optical signal;
wherein the two upstream optical carriers dedicated for the ONU are configured to carry upstream radio frequency signals of the ONU;a multiplexing/demultiplexing unit, configured to multiplex through wavelength division downstream optical signals outputted from each of the at least one transmitting unit and to transmit the multiplexed downstream optical signals to an ONU via an optical distribution network (ODN); and
to demultiplex through wavelength division the multiplexed upstream optical wave of each ONU transmitted by an ODN, and output the demultiplexed upstream optical signals; andat least one receiving unit, configured to obtain an upstream signal from the demultiplexed upstream optical signals. - View Dependent Claims (2, 3, 4, 5, 15)
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6. A passive optical network, comprising an optical line terminal (OLT), an optical distribution network (ODN) and, at least one optical network unit (ONU), configured to implement a method comprising:
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in the downstream direction; modulating a downstream radio frequency signal to be transmitted to each optical network unit (ONU) on a downstream optical carrier dedicated for the ONU, combining the modulated downstream optical carrier for the ONU and two upstream optical carriers dedicated for the ONU, multiplexing each combined downstream optical signal for each wavelength division ONU, and transmitting the multiplexed optical signal to the ONU via an optical distribution network (ODN), by an optical line terminal (OLT); wherein the two upstream optical carriers dedicated for the ONU carry upstream radio frequency signals of the ONU; in the upstream direction; receiving the wavelength division multiplexed upstream optical wave of each ONU which is transmitted from an ODN, and demultiplexing the multiplexed upstream optical wavelength division wave, and obtaining the upstream signal from each demultiplexed upstream optical signal, by an OLT.
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7. (canceled)
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8. (canceled)
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9. A radio frequency signal transmission method, comprising:
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in the downstream direction; modulating a downstream radio frequency signal to be transmitted to each optical network unit (ONU) on a downstream optical carrier dedicated for the ONU, combining the modulated downstream optical carrier for the ONU and two upstream optical carriers dedicated for the ONU, multiplexing each combined downstream optical signal for each wavelength division ONU, and transmitting the multiplexed optical signal to the ONU via an optical distribution network (ODN), by an optical line terminal (OLT); wherein the two upstream optical carriers dedicated for the ONU carry upstream radio frequency signals of the ONU; in the upstream direction; receiving the wavelength division multiplexed upstream optical wave of each ONU which is transmitted from an ODN, and demultiplexing the multiplexed upstream optical wavelength division wave, and obtaining the upstream signal from each demultiplexed upstream optical signal, by an OLT. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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Specification