Patent ID: 9288028
Filing Date: 2016-03-15
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting, by a user equipment, an uplink signal in a wireless communication system, the method comprising: receiving, by the user equipment from a base station, machine type communication (MTC) group configuration information for a group of user equipments (MTC group); receiving, by the user equipment from the base station, a random access response physical downlink control channel (RA response PDCCH) corresponding to a random access preamble based on the MTC group configuration information and a random access response physical downlink shared channel (RA response PDSCH) based on the RA response PDCCH, with or without transmitting, by the user equipment, the random access preamble to the base station according to whether the user equipment is a primary user equipment of the MTC group or not; transmitting, by the user equipment to the base station, uplink data to the base station based on the RA response PDSCH; receiving, by the user equipment from the base station, a PDSCH carrying downlink feedback information for the MTC group (DL feedback PDSCH); and retransmitting, by the user equipment to the base station, the uplink data when acknowledgement/negative acknowledgement (ACK/NACK) information of the user equipment, included in the DL feedback PDSCH, indicates NACK.