Base station, wireless communication system, wireless resource allocating method, and wireless communicating method
First Claim
1. A wireless communication system comprising:
- a base station;
a terminal communicating with the base station via a first channel; and
a relay device communicating with the terminal via a second channel and communicating with the base station via a third channel,the base station comparing a communication quality of the first channel, a communication quality of the second channel, and a communication quality of the third channel and setting a channel for data communication between the terminal and the base station according to a comparison result,the first channel, the second channel, and the third channel being allocated by a communication resource for the data communication from a communication resource group,the base station includes a determining unit determining whether the relay device is to relay based on the comparison result, anda notifying unit notifying the relay device of a determination result,the relay device including a relay control unit, when receiving data addressed to the terminal from the base station according to the determination result in response to the determination result, the relay control unit determining whether to transmit the data to the terminal.
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Accused Products
Abstract
In a wireless communication system, when data communication is performed between a relay device and a terminal (in a second path), the same amount of data is required to be transferred between a base station and the relay device (in a third path). An amount of wireless communication resources required is obtained by adding an amount inversely proportional to a capacity of each of the second and third wireless transmission-paths. Therefore, the amount inversely proportional to the capacity of the third path is consumed in excess. Based on a channel quality of a first wireless channel between the base station and the terminal, a channel quality of a second wireless channel between the terminal and the relay station, and a channel quality of a third wireless channel between the base station and the relay station, it is determined whether data communication between the base station and the terminal is relayed.
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Citations
12 Claims
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1. A wireless communication system comprising:
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a base station; a terminal communicating with the base station via a first channel; and a relay device communicating with the terminal via a second channel and communicating with the base station via a third channel, the base station comparing a communication quality of the first channel, a communication quality of the second channel, and a communication quality of the third channel and setting a channel for data communication between the terminal and the base station according to a comparison result, the first channel, the second channel, and the third channel being allocated by a communication resource for the data communication from a communication resource group, the base station includes a determining unit determining whether the relay device is to relay based on the comparison result, and a notifying unit notifying the relay device of a determination result, the relay device including a relay control unit, when receiving data addressed to the terminal from the base station according to the determination result in response to the determination result, the relay control unit determining whether to transmit the data to the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station comprising:
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a comparing unit comparing a communication quality of a first channel between the base station and a terminal, a communication quality of second channel between a relay device and the terminal, and a communication quality of a third channel between the base station and the relay device; and a setting unit setting a channel for data communication between the terminal and the base station according to a comparison result, the first channel, the second channel, and the third channel being allocated by a communication resource for the data communication from a communication resource group, a determining unit determining whether the relay device is to relay based on the comparison result; and a notifying unit notifying the relay device of the determination result, the determining unit determining whether to relay with at least one relay device, and the notifying unit notifying a plurality of relay devices of the determination result.
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12. A wireless communicating method comprising the steps of:
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transmitting a first reference signal from a base station to a terminal; transmitting a second reference signal from a relay device to the terminal; transmitting a third reference signal from the base station to the terminal; obtaining, from the terminal, an estimation result of a communication quality of a first wireless channel between the base station and the terminal corresponding to the first reference signal; obtaining, from the terminal device, an estimation result of a communication quality of a second wireless channel between the relay device and the terminal corresponding to the second reference signal; obtaining, from the relay device, an estimation result of a communication quality of a third wireless channel between the base station and the relay device corresponding to the third reference signal; and setting a wireless channel for downlink data communication from the base station to the terminal by using the estimation result of the communication quality of the first wireless channel, the estimation result of the communication quality of the second wireless channel, and the estimation result of the communication quality of the third wireless channel.
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Specification