Relay station, base station and communication system
First Claim
1. A relay station for relaying data from a base station to a mobile station, the relay station comprising:
- a transmitter configured to transmit data in a timing indicated in downlink control information that is transmitted from the base station; and
a receiver configured to receive specific data and first downlink control information indicating a first timing for a transmission of the received specific data from the relay station to the mobile station, the specific data and the received first downlink control information being transmitted from the base station to the relay station, the specific data being intended for the mobile station;
wherein the transmitter is configured to transmit the specific data to the mobile station in the first timing indicated in the received first downlink control information, when it is determined that the receiver successfully receives the specific data from the base station;
wherein the receiver is configured to receive a second downlink control information indicating a second timing for a retransmission of the specific data from the relay station to the mobile station when it is determined that the mobile station unsuccessfully receives the specific data from the relay station that was transmitted in said first timing, the second downlink control information being transmitted from the base station to the relay station without a retransmission of the specific data from the base station to the relay station when it is determined that the receiver has already successfully received the specific data from the base station; and
wherein the transmitter is configured to retransmit the specific data to the mobile station in the second timing indicated in the received second downlink control information.
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Accused Products
Abstract
The present invention utilizes a relay station operable to receive, from a base station, a first signal to control transmitting operation of a mobile station and operable to receive a second signal transmitted from said mobile station in accordance with the first signal. The relay station comprises a control unit to generate a control signal affecting said first signal and control transmission of said control signal to said base station, and a reception processing part to receive a radio signal transmitted from said mobile station which transmits said radio signal in accordance with said first signal which is affected by said control signal.
26 Citations
6 Claims
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1. A relay station for relaying data from a base station to a mobile station, the relay station comprising:
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a transmitter configured to transmit data in a timing indicated in downlink control information that is transmitted from the base station; and a receiver configured to receive specific data and first downlink control information indicating a first timing for a transmission of the received specific data from the relay station to the mobile station, the specific data and the received first downlink control information being transmitted from the base station to the relay station, the specific data being intended for the mobile station; wherein the transmitter is configured to transmit the specific data to the mobile station in the first timing indicated in the received first downlink control information, when it is determined that the receiver successfully receives the specific data from the base station; wherein the receiver is configured to receive a second downlink control information indicating a second timing for a retransmission of the specific data from the relay station to the mobile station when it is determined that the mobile station unsuccessfully receives the specific data from the relay station that was transmitted in said first timing, the second downlink control information being transmitted from the base station to the relay station without a retransmission of the specific data from the base station to the relay station when it is determined that the receiver has already successfully received the specific data from the base station; and wherein the transmitter is configured to retransmit the specific data to the mobile station in the second timing indicated in the received second downlink control information. - View Dependent Claims (2)
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3. A base station for transmitting data to a mobile station via a relay station, the base station comprising:
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a receiver; a transmitter configured to transmit, to the relay station, specific data and first downlink control information indicating a first timing for a transmission of the specific data from the relay station to the mobile station, the specific data and the first downlink control information being intended for delivery to the mobile station, wherein the specific data is transmitted from the relay station to the mobile station in accordance with the first timing when it is determined that the relay station successfully receives the specific data from the base station; and wherein the transmitter is further configured to transmit a second downlink control information indicating to the relay station a second timing for a retransmission of the specific data, which was already transmitted by the base station to the relay station, said retransmission being from the relay station to the mobile station when the base station is notified that the mobile station unsuccessfully receives the specific data transmitted previously from the relay station in the first timing, the second downlink control information being transmitted from the base station to the relay station without a retransmission of the transmitted specific data from the base station to the relay station when it is determined that the receiver has already successfully received the specific data from the base station. - View Dependent Claims (4)
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5. A mobile station for receiving data from a base station via a relay station, the mobile station comprising:
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a transmitter; and a receiver configured to; receive, in a first timing indicated in a first downlink control information that is received by the relay station from the base station, specific data transmitted from the relay station when the relay station has successfully received the specific data from the base station, the specific data having been intended for delivery from the base station to the mobile station via the relay station, and receive, in a second timing indicated in a second downlink control information that is received by the relay station from the base station, the specific data retransmitted from the relay station when it is determined that the mobile station unsuccessfully receives the specific data from the relay station that was transmitted in said first timing, wherein the retransmission of the specific data, which was previously transmitted to the mobile station in the first timing, from the relay station to the mobile station is performed without a retransmission of the specific data from the base station to the relay station after it is determined that the relay station successfully receives the specific data from the base station. - View Dependent Claims (6)
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Specification