Method for transmitting HARQ-ACK information based on transmission diversity

摘要

A method for transmitting HARQ-ACK information based on transmission diversity is provided. The method includes configuring two component carriers, referred to as Cells, for a User Equipment (UE); when a base station configures the UE to transmit HARQ-ACK information adopting the transmission diversity technique, the base station indicates dynamically whether an other Cell is scheduled in the same subframe via a PDCCH scheduling a PDSCH of one Cell, so as to enable the UE to know the number of Cells scheduled in the same downlink subframe by the base station, and to generate HARQ-ACK information based on the number of Cells. Unnecessary spatial bundling of the HARQ-ACK information may be avoided, unnecessary downlink data retransmission is reduced and throughput of downlink data is improved.

主权项

1. A method for transmitting, by a user equipment (UE), hybrid automatic retransmission request-acknowledgement (HARQ-ACK) information, comprising:
obtaining first information for a number of cells scheduled by a base station in a subframe; obtaining second information for whether a scheduled cell is cross-carrier scheduled; obtaining third information for whether data transmitted by the scheduled cell is semi-persistent scheduling (SPS) data; receiving data based on at least two of the first information, the second information, and the third information from the base station in the subframe; generating HARQ-ACK information based on the first information and whether the data is correctly received; and transmitting the HARQ-ACK information to the base station using at least one resource determined based on at least one of the second information and the third information.