METHOD AND APPARATUS FOR PERFORMING HARQ IN MULTIPLE CARRIER SYSTEM
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for performing hybrid automatic repeat request (HARQ) in a multiple carrier system are provided. A user equipment performs an HARQ process in a source component carrier. When the user equipment receives a management message regarding a transfer from the source component carrier to a target component carrier, the user equipment subsequently performs the HARQ process in the target component carrier.
-
Citations
21 Claims
-
1-13. -13. (canceled)
-
14. A method of performing hybrid automatic repeat request (HARQ) in a multiple carrier system, performed by a user equipment, the method comprising:
-
receiving a first downlink grant on a downlink control channel through a source component carrier, the first downlink grant including a first HARQ process index (HID) indicating an HARQ process index and a first new data indicator (NDI) indicating that a new transmission or a retransmission is performed; receiving a downlink transfer block on the downlink data channel indicated by a resource allocation in the first downlink grant; transmitting a NACK signal for the downlink transport block; receiving a management message regarding a transfer from the source component carrier to a target component carrier; receiving a second downlink grant on the downlink control channel through the target component carrier, the second downlink grant including a second HID indicating same HARQ process as the first HID and a second NDI indicating that a retransmission is performed; and receiving a retransmission of the downlink transfer block through the target component carrier. - View Dependent Claims (15, 16, 17)
-
-
18. A user equipment comprising:
-
a radio frequency (RF) unit for transmitting and receiving a radio signal; and a processor, coupled to the RF unit, for performing hybrid automatic repeat request (HARQ), and configured to; receive a first downlink grant on a downlink control channel through a source component carrier, the first downlink grant including a first HARQ process index (HID) indicating an HARQ process index and a first new data indicator (NDI) indicating that a new transmission or a retransmission is performed; receive a downlink transfer block on the downlink data channel indicated by a resource allocation in the first downlink grant; transmit a NACK signal for the downlink transport block; receive a management message regarding a transfer from the source component carrier to a target component carrier; receive a second downlink grant on the downlink control channel through the target component carrier, the second downlink grant including a second HID indicating same HARQ process as the first HID and a second NDI indicating that a retransmission is performed; and receive a retransmission of the downlink transfer block through the target component carrier. - View Dependent Claims (19, 20, 21)
-
Specification