Layer-to-DMRS port mapping for MIMO systems with higher ranks

摘要

A demodulation reference symbol port mapping method is disclosed. The method includes: a base station communicates with a User Equipment (UE), and allocates corresponding data stream to the UE according to the attribution of the UE; the base station maps the corresponding data stream from a layer to a corresponding demodulation reference symbol port; the base station transmits the corresponding data stream to the UE via demodulation reference symbol port. By restricting the demodulation reference symbol port mapping solution of rank=1 to rank=8 and the demodulation reference symbol port mapping solution when the retransmission occurs, the technical solution enables the demodulation reference symbol port mapping solution to compatible with the present system and to keep lower overhead of the demodulation reference symbol.