Patent ID: 9379851
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A method of performing a hybrid automatic repeat request (HARQ) by a user equipment in a wireless communication system, the user equipment capable of capable of aggregating a plurality of downlink component carriers and aggregating a plurality of uplink component carriers, the method comprising: receiving, by a user equipment from a base station via a first downlink component carrier, a first uplink grant for a first uplink component carrier, and a second uplink grant for a first second component carrier; transmitting, by the user equipment to the base station based on the first and second uplink grant, a first physical uplink shared channel (PUSCH) via the first uplink component carrier and a second PUSCH via the second uplink component carrier; receiving, by the user equipment from the base station, a first ACK/NACK with respect to the first PUSCH and a second ACK/NACK with respect to the second PUSCH, wherein, if a number of the aggregated uplink component carriers is greater than a number of the aggregated downlink component carriers, if the second uplink grant for the second uplink component carriers is received via the first downlink component carrier and if a physical hybrid automatic repeat request indicator channel (PHICH) is not enough to include the ACK/NACK signals, the first ACK/NACK signal is received on the PHICH while the second ACK/NACK signal is received on a physical downlink control channel (PDCCH).