Patent ID: 9474003
Filing Date: 2016-10-18
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting an uplink signal by a user equipment in which a plurality of serving cells are configured, the method comprising: receiving, by the user equipment, UL primary cell (UL PCell) information indicating a serving cell among the plurality of serving cells; configuring, by the user equipment, the indicated serving cell as an UL PCell; receiving, by the user equipment, a physical downlink control channel (PDCCH) through one of the plurality of serving cells; and transmitting, by the user equipment, a physical uplink control channel (PUCCH) associated with the PDCCH through the UL PCell, wherein the UL PCell responsible for transmission of the PUCCH is configured to be different from a serving cell configured as a DL PCell responsible for reception of DL common control information when the plurality of serving cells include at least two serving cells of which time division duplex (TDD) UL-DL configurations are different.