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US 8,553,529 B2Granted
Method and apparatus for performing a HARQ operation in a multi-carrier system
AssigneeLG Electronics Inc.
InventorsJae Hoon Chung, So Yeon Kim, Yeong Hyeon Kwon, Hyun Soo Ko, Seung Hee Han, Moon Il Lee
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Abstract
A method of performing hybrid automatic repeat request (HARQ) of a user equipment (UE) in a multiple-carrier system is provided. The UE transmits uplink data on an uplink carrier. The UE receives acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier. Accordingly, HARQ can be supported in a multiple-carrier system.
Claims4
A method of performing hybrid automatic repeat request (HARQ) of a user equipment (UE) in a multiple-carrier system, the method comprising:
- transmitting uplink data on an uplink carrier;
- and
- receiving acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier, wherein the downlink carrier is associated on the basis of an index of the uplink carrier, a radio resource used for transmission of the uplink data, and a demodulation reference signal (DM-RS) applied to the uplink data,
- wherein the downlink carrier is identified by an index determined based on a value calculated by dividing a logical index for the total sum of resource blocks of all uplink carriers by the number of all downlink carriers.
1 more element
A user equipment (UE) comprising:
- a radio frequency (RF) unit for transmitting and receiving a radio signal;
- and
- a processor coupled to the RF unit,
- wherein the processor is configured for:
- transmitting uplink data on an uplink carrier;
- and
- receiving acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier, wherein the downlink carrier is associated on the basis of an index of the uplink carrier, a radio resource used for transmission of the uplink data, and a demodulation reference signal (DM-RS) applied to the uplink data,
- wherein the downlink carrier is identified by an index determined based on a value calculated by dividing a logical index for the total sum of resource blocks of all uplink carriers by the number of all downlink carriers.
5 more elements
Dependencies are inferred from the claim text.