Multimode service radio communication method and apparatus
View Patent ↗A multimode service radio communication apparatus, that provides a hand-held or vehicle-mounted terminal with radio communication and radio broadcasting information of a radio information and communication providing system including mobile communication systems and intelligent transport systems, includes a frequency division multiplexer that integration-converts individual radio or intermediate frequencies modulated for mobile telephones and broadcasts so that the modulated frequencies are included in a specific frequency band, and produces radio signals in the specific frequency band; supply device for supplying the radio signals; an antenna for receiving and transmitting the supplied radio signals; a shared antenna for receiving the transmitted radio signals; and terminals to which specific frequencies in the specific frequency band are selectively linked.
1. An allocation device which communicates with a local base station by radio and comprises a shared antenna, a frequency division multiplexer, and a link unit, and is configured so that:
said shared antenna is configured to receive a shared frequency band of radio signals radiated from said local base station, said shared frequency band including different shared frequency bandwidth portions, each different shared frequency bandwidth portion being associated with a different service, each different service being associated with a separate service frequency band;
said frequency division multiplexer is configured to division-convert the shared frequency band of radio signals received by said shared antenna into plural kinds of signals in respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band; and
said link unit is configured to link to external receivers that are associated with the different services to send the plural kinds of signals in the respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band to each said external receiver as a signal in a frequency band corresponding to the different separate service frequency band associated with each said external receiver.
2. The allocation device according to claim 1 , further comprising a selection input unit configured to receive a selection input designating which kind of signal to select from the plural kinds of signals; and
when the kind of signal designated by the selection input unit is identical to a kind of a signal in the different separate service frequency band of a particular external receiver linked to said link unit, said link unit sends the signal designated by the selection input unit to said particular external receiver.
3. The allocation device according to claim 1 , wherein said link unit is configured to link to the external receiver by radio or via a cable.
4. The allocation device according to claim 1 , wherein said link unit is linked to each said external receiver via a cable and each of the plural kinds of signals in the respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band is an intermediate signal modulated for a different external receiver.
5. An allocation method comprising the steps of:
receiving a shared frequency band of radio signals said shared frequency band including different shared frequency bandwidth portions, each different shared frequency bandwidth portion being associated with a different service, each different service being associated with a separate service frequency band;
division-converting the shared frequency band of radio signals received by the shared antenna into plural kinds of signals in respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band; and
sending the plural kinds of signals in the respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band to each said external receiver as a signal in a frequency band corresponding to the different separate service frequency band associated with each said external receiver.
6. The allocation method according to claim 5 , further comprising the step of receiving a selection input designating one kind of signal to select from the plural kinds of signals, and when the one kind of signal designated by the received selection input is identical to a kind of a signal in the different separate service frequency band of the a particular external receiver, sending the signal designated by the received selection input to the particular external receiver.
7. The allocation method according to claim 5 , wherein signals are sent to the external receiver by radio or via a cable in said sending step.
8. The allocation method according to claim 5 , wherein when each of the plural kinds of signals in the respective frequency bands which do not overlap with one another and which each correspond to a different separate service frequency band is an intermediate signal modulated for a different external receiver, sending the plural kinds of signals to each different external receiver via a cable in said sending step.