METHOD FOR RETRANSMITTING DATA IN THE MULTI-CARRIER SYSTEM
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Abstract
A method for modifying a synchronous non- adaptive retransmission scheme to solve the limitation of the synchronous non-adaptive retransmission scheme is disclosed. A method for indicating not only the new data transmission but also the retransmission using a data scheduling message is disclosed. A method for determining whether there is an error in the ACK signal transmitted from a data reception end using another message to -be received later is disclosed. The retransmission method for a multi-carrier system includes: receiving a grant message including scheduling information for transmitting uplink data wherein a retransmission scheme for the uplink data is predetermined by a first retransmission scheduling, transmitting the uplink data according to the scheduling information and retransmitting the uplink data according to second retransmission scheduling by receiving the second retransmission scheduling information associated with the uplink data with retransmission request.
48 Citations
25 Claims
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1-16. -16. (canceled)
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17. A method of data retransmission in a multi carrier system,
(a) receiving a first grant message including a first New Data Indicator (NDI) and a first resource allocation information for an uplink data transmission, wherein the first NDI indicates whether a new data is transmitted or retransmitted; -
(b) transmitting the uplink data according to the first resource allocation information; and (c) receiving an acknowledgement message representing whether the uplink data is successfully received; (d-0) when a second grant message including second resource allocation information for the uplink data retransmission and a second NDI which is not toggled compare with the first NDI at the step of (c), the method further comprising; adaptively retransmitting the uplink data using the second resource allocation information; (d-1) when the second grant message is not received and the acknowledgement message is a negative acknowledgement (NACK) message, the method further comprising; non-adaptively retransmitting the uplink data using the first resource allocation information. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method of data retransmission in a multi carrier system,
(a) transmitting, to an User Equipment (UE), a first grant message including a first New Data Indicator (NDI) and a first resource allocation information for an uplink data transmission, wherein the first NDI indicates whether a new data is transmitted or retransmitted; -
(b) receiving, from the UE, the uplink data according to the first resource allocation information; and (c) transmitting, to the UE, an acknowledgement message representing whether the uplink data is successfully received; (d-0) when a second grant message including second resource allocation information for the uplink data retransmission and a second NDI of which value is not toggled compared with a value of the first NDI is further transmitted at the step of (c), the method further comprising; receiving the uplink data which is adaptively retransmitted by the UE using the second resource allocation information, (d-1) when the acknowledgement message is a negative acknowledgement message, the method further comprising; receiving the uplink data which is non-adaptively retransmitted by the UE using the first resource allocation information. - View Dependent Claims (24, 25)
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Specification