Patent ID: 8477682
Filing Date: 2013-07-02
Classification: H04L

Abstract:
1. A base station that multiplexes and retransmits a plurality of independently retransmitted downlink data packets to an identical terminal and transmits one or more pieces of downlink control information for decoding the retransmitted downlink data packets to the same terminal, (1) wherein the base station, at subframe T provides downlink control information with process ID P transmits one set of downlink control information containing information needed for decoding data packets A and B at the subframe T (2) wherein the base station, at subframe T provides downlink control information with process ID P transmits one set of downlink control information containing information needed for decoding data packets C and D at the subframe T (3) wherein, when one of data packets A and B is NAK'ed and one of data packets C and D is NAK'ed according to ACK/NAK indication received from the terminal, the base station retransmits NAK'ed data packets at subframe T selects one of a layer and a channel used for data packet re-transmission in process P defines one of a layer and a channel not selected for data packet re-transmission in process P retransmits the first downlink control information and the second downlink control information to the terminal at the subframe T