Method for retransmitting data in the multi-carrier system
First Claim
1. A user equipment (UE) for uplink data retransmission in a multi carrier system, the UE comprising:
- a transmission module controlling an uplink data transmission and the uplink data retransmission;
a receiving module controlling receiving of a message and a signal used in the uplink data retransmission; and
a processor controlling the transmission module and the receiving module to perform the uplink data retransmission,wherein the processor is configured to;
receive a first grant message including a first New Data Indicator (NDI) and first resource allocation information for the uplink data transmission, wherein the first NDI indicates whether new data is transmitted or retransmitted;
transmit uplink data according to the first resource allocation information;
receive an acknowledgement message indicating whether the uplink data is successfully received;
adaptively retransmit the uplink data using second resource allocation information when a second grant message, including the second resource allocation information for the uplink data retransmission and a second NDI which is not toggled compared with the first NDI, is further receivedwith the acknowledgement message; and
non-adaptively retransmit the uplink data using the first resource allocation information when the second grant message is not received and the acknowledgement message is a negative acknowledgement (NACK) message.
1 Assignment
0 Petitions
Accused Products
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.
17 Citations
9 Claims
-
1. A user equipment (UE) for uplink data retransmission in a multi carrier system, the UE comprising:
-
a transmission module controlling an uplink data transmission and the uplink data retransmission; a receiving module controlling receiving of a message and a signal used in the uplink data retransmission; and a processor controlling the transmission module and the receiving module to perform the uplink data retransmission, wherein the processor is configured to; receive a first grant message including a first New Data Indicator (NDI) and first resource allocation information for the uplink data transmission, wherein the first NDI indicates whether new data is transmitted or retransmitted; transmit uplink data according to the first resource allocation information; receive an acknowledgement message indicating whether the uplink data is successfully received; adaptively retransmit the uplink data using second resource allocation information when a second grant message, including the second resource allocation information for the uplink data retransmission and a second NDI which is not toggled compared with the first NDI, is further received with the acknowledgement message; and non-adaptively retransmit the uplink data using the first resource allocation information when the second grant message is not received and the acknowledgement message is a negative acknowledgement (NACK) message. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A Node-B for data retransmission in a multi carrier system, the Node-B comprising:
-
a transmission module controlling a message and a signal used in the data retransmission; a receiving module receiving uplink data transmitted from a User Equipment (UE); and a processor controlling the transmission module and the receiving module to perform the data retransmission, wherein the processor is configured to; transmit, to the UE, a first grant message including a first New Data Indicator (NDI) and first resource allocation information for the uplink data transmission, wherein the first NDI indicates whether a new data is transmitted or retransmitted; receive, from the UE, uplink data according to the first resource allocation information; transmit, to the UE, an acknowledgement message indicating whether the uplink data is successfully received; receive the uplink data which is adaptively retransmitted by the UE using second resource allocation information when a second grant message, including the second resource allocation information for the uplink data retransmission and a second NDI of which a value is not toggled compared with a value of the first NDI, is further transmitted with the acknowledgement message; and receive the uplink data which is non-adaptively retransmitted by the UE using the first resource allocation information when the acknowledgement message is a negative acknowledgement message. - View Dependent Claims (8, 9)
-
Specification