Radio communication system including SDL having transmission rate of relatively high speed
First Claim
1. A radio communication system including a base station, a plurality of terminals, an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
- a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency in a relatively low frequency band at a relatively low transmission rate from said terminal to said base station via said uplink;
a low-speed receiving means, provided at said base station, for receiving a radio signal of a relatively low frequency sent at a low transmission rate from said terminal to said base station via said uplink;
a high-speed transmitting means, provided at said base station, for transmitting a radio signal having a radio frequency in a relatively high frequency band at a relatively high transmission rate from said base station to said terminal via said downlink; and
a high-speed receiving means, provided at said terminal, for receiving a radio signal having a radio frequency in a relatively high frequency band at a relatively high transmission rate from said base station to said terminal via said downlink.
1 Assignment
0 Petitions
Accused Products
Abstract
A large amount of user information is transmitted with good efficiency by means of a high-speed downlink by making transmission rates of an uplink circuit and a downlink asymmetrical. The radio communication system includes a plurality of base stations, a plurality of terminals, an uplink established between each of the base stations and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink circuit established between each of the terminals and each of the base station for the purpose of radio transmission of prescribed data from a base station to a terminal. This radio communication system has a low-speed transmitting means, provided at the terminal, which transmits a radio signal at a relatively low transmission rate to an above-noted base station via the above-noted uplink, a low-speed receiving means, provided at the base station, which receives a radio signal sent at a relatively low transmission rate from the terminal via the uplink, a high-speed transmitting means, provided at the base station, which transmits a radio signal at a relatively high transmission rate to an above-noted terminal via the above-noted downlink, and a high-speed receiving means, provided at the terminal, which receives a radio sent at a relatively high transmission rate from the base station via the downlink.
143 Citations
13 Claims
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1. A radio communication system including a base station, a plurality of terminals, an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
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a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency in a relatively low frequency band at a relatively low transmission rate from said terminal to said base station via said uplink; a low-speed receiving means, provided at said base station, for receiving a radio signal of a relatively low frequency sent at a low transmission rate from said terminal to said base station via said uplink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal having a radio frequency in a relatively high frequency band at a relatively high transmission rate from said base station to said terminal via said downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal having a radio frequency in a relatively high frequency band at a relatively high transmission rate from said base station to said terminal via said downlink.
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2. A radio communication system including a base station, a plurality of terminals, an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
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a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency at a relatively low transmission rate from said terminal to said base station via said uplink; a low-speed receiving means, provided at said base station, for receiving a radio of a signal sent at a relatively low transmission rate from said terminal to said base station via said uplink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; wherein said high-speed transmitting means transmits a large amount of user-information data which is sent from said base station to said terminal via said downlink by means of a high-frequency-band radio signal, and wherein said low-speed transmitting means transmits a small amount of control data which is sent from said terminal to said base station via said uplink by means of a low-frequency-band radio signal.
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3. A radio communication system including a base station, a plurality of terminals, an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
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a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency at a relatively low transmission rate from said terminal to said base station via said uplink; a low-speed receiving means, provided at said base station, for receiving a radio signal sent at a relatively low transmission rate from said terminal to said base station via said uplink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; an optimum connection station interpreting means which receives a signal for the purpose of identifying a wideband radio base station, notification of which is made from said wideband radio base station via a radio line, and which interprets from this signal said wideband radio base station that is suitable for connection; and a service starting means which starts a prescribed service via a specific wideband radio base station which is judged to be suitable for connection with respect to said mobile base station. - View Dependent Claims (4)
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5. A radio communication system including a base station, a plurality of terminals, an unlink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
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a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency at a relatively low transmission rate from said terminal to said base station via said uplink; a low-speed receiving means, provided at said base station, for receiving a radio signal sent at a relatively low transmission rate from said terminal to said base station via said unlink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; wherein a method of modulation of the radio signal which is sent via said uplink by means of said low-speed transmission means provided at said terminal is different from a method of modulation of the radio signal sent via said downlink by means of said high-speed transmission means provided at said base station.
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6. A radio communication system, comprising:
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a base station; a plurality of terminals; an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station at a relatively low transmission rate; a high-speed downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed information from a base station to a terminal in a relatively high-speed transmission; a low-speed downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed information from a base station to a terminal at a transmission rate approximately the same as said uplink; a first low-speed transmitting means, provided at said terminal, for transmitting to said base station a radio signal at a relatively low transmission rate in a relatively low-frequency band via said uplink; a first low-speed receiving means, provided at said base station, for receiving a radio signal sent at a relatively low transmission rate from said terminal to said base station via said uplink; a second low-speed transmitting means, provided at said base station, for transmitting to said terminal a radio signal at a relatively low transmission rate in a relatively low-frequency band via said low-speed downlink; a second low-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively low transmission rate in a relatively low-frequency band via said low-speed downlink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate in a relatively high-frequency band from said base station to said terminal via said high-speed downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate in a relatively high-frequency band from said base station to said terminal via said high-speed downlink. - View Dependent Claims (7, 8, 9, 10)
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11. A radio communication system, comprising:
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a base station; a plurality of terminals; an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station at a relatively low transmission rate; a high-speed downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed information from a base station to a terminal in a relatively high-speed transmission; a low-speed downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed information from a base station to a terminal at a transmission rate approximately the same as said uplink; a first low-speed transmitting means, provided at said terminal, for transmitting to said base station a radio signal at a relatively low transmission rate via said uplink; a first low-speed receiving means, provided at said base station, for receiving a radio signal sent at a relatively low transmission rate from said terminal to said base station via said uplink; a second low-speed transmitting means, provided at said base station, for transmitting to said terminal a radio signal at a relatively low transmission rate via said low-speed downlink; a second low-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively low transmission rate in a relatively low-frequency band via said low-speed downlink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate from said base station to said terminal via said high-speed downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate from said base station to said terminal via said high-speed downlink; wherein said terminal, as a mobile radio station, includes an optimum connection station interpreting means which receives a signal for the purpose of identifying a wideband radio base station, notification of which is made from said wideband radio base station via a radio line, and which interprets from this signal said wideband radio base station that is suitable for connection, and a service starting means which starts a prescribed service via a specific wideband radio base station which is judged to be suitable for connection with respect to said mobile base station. - View Dependent Claims (12)
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13. A radio communication system including a base station, a plurality of terminals, an uplink established between the base station and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink established between each of the terminals and the base station for the purpose of radio transmission of prescribed data from a base station to a terminal, said radio communication system comprising:
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a low-speed transmitting means, provided at said terminal, for transmitting a radio signal having a radio frequency at a relatively low transmission rate from said terminal to said base station via said uplink; a low-speed receiving means, provided at said base station, for receiving a radio signal sent at a relatively low transmission rate from said terminal to said base station via said uplink; a high-speed transmitting means, provided at said base station, for transmitting a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; and a high-speed receiving means, provided at said terminal, for receiving a radio signal sent at a relatively high transmission rate from said base station to said terminal via said downlink; wherein said base station is connected, via a data bus, to a data server which stores and processes given data for said base station, based on control information which is input to said base station from said terminal via said unlink, wherein said data server is formed from at least a memory which serves as a database, a processor which serves as an information amount expanding server, and a control server having a storage means and a control means, said memory, said processor, and said control server operating in cooperation. wherein said base station supplies said terminal with prescribed information via said downlink in the form it is read out from said memory, said terminal performs transmission of a given processing operator and added information via said low-speed uplink for the purpose of meeting requirements, and wherein said data server processes said prescribed information, based on said processing operator and added information sent from said base station via said data bus, generates processed data and transmits the generated processed data to said terminal from said base station via said downlink.
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Specification