Patent ID: 9236992
Filing Date: 2016-01-12
CPC Classification: H04L

Claim Text:
1. A method by a base station for transmitting scheduling signals in a wireless communication system supporting carrier aggregation of a plurality of component carriers (CCs) assigned to a user equipment (UE), the method comprising: transmitting, by the base station to the UE, via a primary component carrier, a first downlink scheduling signal for Physical Downlink Shared Channel (PDSCH) transmission on a first downlink component carrier (DL CC) assigned to the UE, and transmitting a second downlink scheduling signal for PDSCH transmission on a second DL CC assigned to the UE when carrier aggregation is applied; and transmitting, by the base station to the UE, the PDSCH according to the first downlink scheduling signal, and transmitting, by the base station to the UE, the PDSCH according to the second downlink scheduling signal, wherein a Multiple Input Multiple Output (MIMO) transmission mode of the first DL CC is set to a first mode and the MIMO transmission mode of the second DL CC is set to a second mode, wherein if the first mode is different from the second mode, a downlink control information (DCI) format of the first downlink scheduling signal is set different from the DCI format of the second downlink scheduling signal, and wherein the payload length of the DCI format of the first downlink scheduling signal is set equal to the payload length of the DCI format of the second downlink scheduling signal using a padding bit based on the DCI format having the maximum payload length.