Radio communication system, radio base-station apparatus, mobile radio-station apparatus, radio zone assignment method, and radio communication method
First Claim
Patent Images
1. A radio communication system in which radio communication is performed between a base station and a mobile station, the base station comprising:
- first transmitting means for transmitting a first transmitted radio signal to the mobile station;
first receiving means for receiving a first received 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, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, by using at least two basic-frequency channels, each basic-frequency channel having a multi-carrier OFDM signal; and
the mobile station comprising;
second transmitting means for transmitting a second transmitted radio signal to the base station;
second receiving means for receiving a second received 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,wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell.
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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.
55 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, the base station comprising:
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first transmitting means for transmitting a first transmitted radio signal to the mobile station; first receiving means for receiving a first received 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, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, by using at least two basic-frequency channels, each basic-frequency channel having a multi-carrier OFDM signal; and the mobile station comprising; second transmitting means for transmitting a second transmitted radio signal to the base station; second receiving means for receiving a second received 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, wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell. - 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, the base station comprising:
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transmitting means for transmitting a transmitted radio signal to the mobile station; receiving means for receiving a received 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, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, by using at least two basic-frequency channels, each basic-frequency channel having a multi-carrier OFDM signal, wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell. - 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, the mobile station comprising:
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transmitting means for transmitting a transmitted radio signal to the base station; receiving means for receiving a received 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, when the mobile station exists in a specific area within a cell to which a basic-frequency channel is assigned, by using at least two basic-frequency channels, each basic-frequency channel having a multi-carrier OFDM signal, wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell. - 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, the radio communication system comprising:
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a plurality of first-type cells to which each 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 of which is provided in one first-type cell, of the plurality of first-type cells, to which the basic-frequency channels are assigned to achieve high-speed communication between the base station and the mobile station, wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell. - View Dependent Claims (11)
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12. A method of performing radio communication between a base station and a mobile station, the 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, wherein the specific area is an area with a predetermined transmitting power, a predetermined radius between the circumference of the specific area and the border between two adjacent cells, and a predetermined radius for each cell. - View Dependent Claims (13, 14)
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Specification