Method for transmitting control information in a carrier aggregation system, receiving method, and terminal

摘要

A method of transmitting control information in a carrier aggregation system is provided. The method includes: transmitting bandwidth information of a component carrier; configuring downlink control information including an additional indication field and an information field; mapping the downlink control information in any one of containing units having a plurality of predetermined different bit sizes in accordance with the bandwidth information; and transmitting the downlink control information mapped to any one of the containing units, wherein the information field is any one of a plurality of control information formats applicable to the component carrier, and the additional indication field includes information indicating a specific control information format to which the information field corresponds among the plurality of control information formats. Accordingly, the number of blind decoding attempts of a user equipment can decrease in a carrier aggregation system. Therefore, power consumption of the user equipment can decrease, and a decoding rate can increase.

主权项

1. A method of transmitting control information by a base station (BS) in a carrier aggregation system, the method comprising:
transmitting, to a user equipment (UE), bandwidth information of a component carrier; generating downlink control information (DCI) using a DCI format among N different DCI formats which can be used in the component carrier, wherein the DCI comprises an additional indication field which informs the UE about the DCI format used to generate the DCI; mapping the DCI to a DCI container among M different DCI containers; and transmitting, to the UE, the DCI mapped to the DCI container so as to enable blind decoding of the DCI by the UE, wherein each of the M different DCI containers has a predetermined bit size in accordance with the bandwidth information, wherein at least 2 DCI formats among the N different DCI formats can be mapped to a same DCI container among the M different DCI containers, wherein, if a bit size of the DCI container is greater than a total bit size of the DCI, different bits remaining after mapping the DCI in the DCI container are padded to a bit having a specific value, and wherein N and M are natural numbers and M is smaller than N.