Patent ID: 9668260
Date: 2017-05-30
CPC Classifications: H04J,H04L,H04W

Claim:
1. A method of transmitting downlink control information (DCI) for an uplink grant in a wireless access system supporting a carrier aggregation scheme, the method comprising: configuring, by a base station (BS), the DCI comprising a carrier indicator field (CIF) indicating any one of a plurality of carriers which are assigned to a user equipment (UE) and scheduling information for the carrier indicated by the CIF; transmitting, by the BS to the UE, a physical downlink control channel (PDCCH) including the DCI; and receiving, by the BS from the UE, uplink data on the carrier indicated by the CIF through a physical uplink shared channel (PUSCH) based on the scheduling information, wherein a location of the CIF is fixed in a front part of a payload of the DCI and wherein the CIF is fixed in size to a number of bits needed to identify each of a plurality of component carriers in the carrier aggregation scheme.