Relay station, relay method, radio communication system, and radio communication apparatus
First Claim
1. A relay node in a mobile communication network, the relay node comprising:
- circuitry configured to;
communicate with a base station via a backhaul link and a mobile station via an access link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA);
select at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data;
receive a downlink signal from the base station via the OFDMA based on the selection;
transmit a relayed signal of the downlink signal to the mobile station via the OFDMA after a first time interval during a first relay process;
receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection; and
transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process.
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Abstract
A relay node in a mobile communication network for relaying communications between a base station and a mobile terminal. The relay node includes a first communication unit that communicates with the base station via a backhaul link using at least one of a first modulation method and a first multiplexing method, and a second communication unit that communicates with the mobile terminal via an access link using at least one of a second modulation method and a second multiplexing method. The relay node also includes a communication control unit that selects the at least one of the first modulation method and the first multiplexing method, or selects the at least one of the second modulation method and the second multiplexing method based on a characteristic of a link, a type of link or a type of data included in a communication signal.
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Citations
17 Claims
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1. A relay node in a mobile communication network, the relay node comprising:
circuitry configured to; communicate with a base station via a backhaul link and a mobile station via an access link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); select at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receive a downlink signal from the base station via the OFDMA based on the selection; transmit a relayed signal of the downlink signal to the mobile station via the OFDMA after a first time interval during a first relay process; receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection; and transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process. - View Dependent Claims (2, 3)
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4. A non-transitory computer-readable medium having stored thereon, computer-executable instructions for causing a relay node to execute operations, the operations comprising:
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communicating with a base station via a backhaul link and a mobile station via an access link using at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); selecting at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receiving a downlink signal from the base station via the OFDMA based on the selection; transmitting a relayed signal of the downlink signal to the mobile station via the OFDMA after a first time interval during a first relay processing, receiving a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection, and transmitting the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay processing. - View Dependent Claims (5)
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6. A method, comprising:
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in a relay node; communicating, by circuitry of the relay node, with a base station via a backhaul link and a mobile station via an access link using at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); selecting at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receiving, by the circuitry of the relay node, a downlink signal from the base station via the OFDMA based on the selection; transmitting, by the circuitry of the relay node, a relayed signal of the downlink signal to the mobile station via the OFDMA after a first time interval during a first relay processing; receiving, by the circuitry of the relay node, a signal as an uplink signal from the mobile station via the SC-FDMA based on the selection, and transmitting, by the circuitry of the relay node, the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay processing. - View Dependent Claims (7)
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8. A wireless communication system, comprising:
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a base station; a mobile station; and a relay node configured to relay communications between the base station and the mobile station; the relay node comprising circuitry configured to; communicate with the base station via a backhaul link and the mobile station via an access link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); select at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receive a downlink signal from the base station via the OFDMA based on the selection; transmit a relayed signal of the downlink signal to the mobile station via the OFDMA after a first time interval during a first relay process; receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection; and transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process. - View Dependent Claims (9)
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10. A relay node in a mobile communication network, the relay node comprising:
circuitry configured to; communicate with a base station via a first link and a mobile station via a second link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); select at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receive a downlink signal from the base station via the OFDMA based on the selection, transmit a relayed signal of the downlink signal to the mobile station via the SC-FDMA after a first time interval during a first relay process; receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection, and transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process. - View Dependent Claims (11)
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12. A wireless communication system, comprising:
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a base station; a mobile station; and a relay node configured to relay communications between the base station and the mobile station; the relay node comprising; circuitry configured to; communicate with the base station via a first link and the mobile station via a second link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA), select at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link, or a type of data; receive a downlink signal from the base station via the OFDMA based on the selection, transmit a relayed signal of the downlink signal to the mobile station via the SC-FDMA after a first time interval during a first relay process; receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection, and transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process. - View Dependent Claims (13)
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14. A method, comprising:
in a relay node; communicating, by circuitry of the relay node, with a base station via a first link and a mobile station via a second link using at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); selecting at least one of the OFDMA or the SC-FDMA based on at least one of a quality of each link or a type of data; receiving, by the circuitry of the relay node, a downlink signal from the base station via the OFDMA based on the selection; transmitting, by the circuitry of the relay node, a relayed signal of the downlink signal to the mobile station via the SC-FDMA after a first time interval during a first relay processing; receiving, by the circuitry of the relay node, a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA based on the selection; and transmitting, by the circuitry of the relay node, the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay processing. - View Dependent Claims (15)
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16. A relay node in a mobile communication network, the relay node comprising:
circuitry configured to; communicate with a base station via a backhaul link and a mobile station via an access link by at least one of Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier-Frequency Division Multiple Access (SC-FDMA); receive a downlink signal from the base station via the OFDMA; transmit a relayed signal of the downlink signal to the mobile station via the OFDMA and the SC-FDMA in parallel after a first time interval during a first relay process; receive a signal to be relayed as an uplink signal from the mobile station via the SC-FDMA; transmit the uplink signal to the base station via the SC-FDMA after a second time interval during a second relay process, wherein a symbol length for each of a first relayed signal of the downlink signal to the mobile station via the OFDMA and a second relayed signal of the downlink signal to the mobile station via the SC-FDMA is same, wherein the first relayed signal and the second relayed signal are relayed in parallel, and wherein a cyclic prefix length for each of the first relayed signal and the second relayed signal is same; and add respective cyclic prefixes of the same cyclic prefix length to respective symbols of the same symbol length. - View Dependent Claims (17)
Specification