Remote access unit and optical network for bidirectional wireless communication using the same
Disclosed is a remote access unit for transmitting and receiving upstream and downstream data in which channels having different transmission scheme are multiplexed, and an optical network for bi-directional wireless communication using same. The remote access unit includes an antenna for receiving the downstream data and wirelessly transmitting same and for receiving the upstream data and providing same to the remote access unit, a switch for outputting downstream time division channels of the downstream data to the antenna and for receiving upstream time division channels of the upstream data from the antenna, and a controller for controlling the switch in order to prevent the upstream and downstream time division channels from overlapping.
1. A remote access unit for transmitting downstream data and receiving upstream data, wherein the downstream and upstream data include multiplexed channels having different transmission schemes, comprising:
an antenna for receiving the downstream data and wirelessly transmitting same and for receiving the upstream data and providing same into the remote access unit;
a switch receiving downstream time division channels demultiplexed from the downstream data and providing the downstream time division channels to the antenna and receiving upstream time division channels demultiplexed from the upstream data inputted through the antenna; and
a controller for controlling the switch in order to prevent the upstream and downstream time division channels from overlapping;
a first duplexer for demultiplexing the downstream data into downstream time division channels and downstream frequency division channels and outputting the downstream time division channels to the switch;
a triplexer for:
demultiplexing the upstream data received through the antenna into upstream time division channels and upstream frequency division channels; and multiplexing the downstream time division channels received from the switch and the downstream frequency division channel inputted from the first duplexer and providing the multiplexed downstream time division and frequency divisions to the antenna; and
a second duplexer for combining the upstream time division channels received from the switch and the upstream frequency division channels inputted from the triplexer, into the upstream data.
2. The remote access unit as claimed in claim 1 , further comprising:
a downstream amplifier for amplifying and outputting the downstream data to the first duplexer; and
an upstream amplifier for amplifying the upstream data outputted from the second duplexer.
3. The remote access unit as claimed in claim 1 , further comprising:
a first downstream amplifier for amplifying and outputting the downstream frequency division channels demultiplexed by the first duplexer to the triplexer;
a second downstream amplifier for amplifying and outputting the downstream time division channels demultiplexed from the downstream data by the first duplexer to the switch;
a first upstream amplifier for amplifying and outputting the upstream frequency division channels demultiplexed by the triplexer; and
a second downstream amplifier located between the switch and the second duplexer, for amplifying and outputting the upstream time division channels inputted from the switch to the second duplexer.
4. A remote access unit for transmitting downstream data and receiving upstream data, wherein the downstream and upstream data include multiplexed channels having different transmission schemes, comprising:
an antenna for receiving the downstream data and wirelessly transmitting same and for receiving the upstream data and providing same into the remote access unit;
a switch receiving downstream time division channels demultiplexed from the downstream data and providing the downstream time division channels to the antenna and receiving upstream time division channels demultiplexed from the upstream data inputted through the antenna; and
a controller for controlling the switch in order to prevent the upstream and downstream time division channels from overlapping;
a first triplexer for dividing the downstream data into broadcasting channels, downstream time division channel and downstream frequency division channels and outputting the downstream time division channels to the switch;
a second triplexer for:
dividing the upstream data received through the antenna into upstream time division channels and upstream frequency division channels and outputting the upstream time division channels to the switch, and
combining the broadcasting channel inputted from the first triplexer and the upstream time division and frequency division channels with the downstream data and outputting the downstream data to the antenna; and
a duplexer for outputting the downstream frequency division channels inputted from the first triplexer to the second triplexer and for receiving the upstream frequency division channels divided by the second triplexer.
5. The remote access unit as claimed in claim 4 , further comprising:
a downstream amplifier for amplifying and outputting the downstream data to the first triplexer; and
an upstream amplifier for amplifying the upstream time division channels inputted through the switch and the upstream frequency division channels received from the duplexer.