Patent ID: 9008201
Filing Date: 2015-04-14
Classification: H04L

Abstract:
1. A method of robust HARQ-ACK reporting by a UE, comprising: receiving downlink transmissions from two or more cells, wherein each downlink transmission includes one or more streams; jointly encoding a HARQ-ACK response for the two or more cells by encoding a HARQ-ACK codeword to resolve an ambiguity in a predetermined codebook of HARQ-ACK codewords that includes at least one HARQ-ACK codeword for downlink MIMO transmissions from one or more of the cells, and such that the decoding of the jointly encoded HARQ-ACK codeword at each cell is independent of the number of streams in downlink transmissions from other cells; and transmitting the jointly encoded HARQ-ACK response to the two or more cells in a single uplink channel.