Radio communication system, radio base-station apparatus, mobile radio-station apparatus, radio-zone assignment method, and radio communication method
First Claim
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1. A radio communication system in which radio communication is performed between a base station and a mobile station, said base station comprising:
- first transmitting means for transmitting a radio signal to the mobile station;
first receiving means for receiving a radio signal from the mobile station; and
first control means for controlling the first transmitting means and the first receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, the basic-frequency channel comprising a multi-carrier OFDM signal; and
said mobile station comprising;
second transmitting means for transmitting a radio signal to the base station;
second receiving means for receiving a radio signal from the base station; and
second control means for controlling the second transmitting means and the second receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in the specific area.
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Abstract
A plurality of frequency-channels are provided, each composed of an OFDM multi-carrier. The OFDM sub-carrier of each channel is orthogonal to the sub-carrier of any other channel, so that two or more channels may be considered to transmit the same OFDM signal. Further, a sub-area that uses two or more channels is provided in each service area in which a base station is located at the center and assigned with a basic-frequency channel.
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Citations
14 Claims
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1. A radio communication system in which radio communication is performed between a base station and a mobile station, said base station comprising:
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first transmitting means for transmitting a radio signal to the mobile station;
first receiving means for receiving a radio signal from the mobile station; and
first control means for controlling the first transmitting means and the first receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, the basic-frequency channel comprising a multi-carrier OFDM signal; and
said mobile station comprising;
second transmitting means for transmitting a radio signal to the base station;
second receiving means for receiving a radio signal from the base station; and
second control means for controlling the second transmitting means and the second receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in the specific area. - View Dependent Claims (2, 3)
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4. A base station for use in a radio communication system in which radio communication is performed between the base station and a mobile station, said base station comprising:
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transmitting means for transmitting a radio signal to the mobile station;
receiving means for receiving a radio signal from the mobile station; and
control means for controlling the transmitting means and the receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, the basic-frequency channel comprising a multi-carrier OFDM signal. - View Dependent Claims (5, 6)
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7. A mobile station for use in a radio communication system in which radio communication is performed between a base station and the mobile station, said mobile station comprising:
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transmitting means for transmitting a radio signal to the base station;
receiving means for receiving a radio signal from the base station; and
control means for controlling the transmitting means and the receiving means to achieve high-speed communication between the base station and the mobile station by using at least two basic-frequency channels, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, the basic-frequency channel comprising a multi-carrier OFDM signal. - View Dependent Claims (8, 9)
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10. A radio communication system in which radio communication is performed between a base station and a mobile station, said system comprising:
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a plurality of first-type cells to which one of a plurality of basic-frequency channel is assigned respectively, each channel comprising a multi-carrier OFDM signal; and
a plurality of second-type cells, each provided in one first-type cell, to which the basic-frequency channels are assigned to achieve high-speed communication between the base station and the mobile station. - View Dependent Claims (11, 13, 14)
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12. A method of performing radio communication between a base station and a mobile station, said method comprising the steps of:
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performing radio communication between the base station and the mobile station through a basic-frequency channel assigned to each cell, the basic-frequency channel comprising a multi-carrier OFDM signal; and
performing high-speed communication between the base station and the mobile station, through the basic-frequency channels when the mobile station exists in a specific area within the cell.
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Specification