Method and user device for receiving downlink data, and method and base station for transmitting downlink data

摘要

The present invention enables an increase in data transmission performance by variously applying precoding to open and closed-loop MIMOs. An eNB in the present invention applies an identical precoder to neighboring PRBs scheduled in UE in the closed-loop MIMO, and applies an non-identical precoder to neighboring PRBs scheduled in UE in an open-loop MIMO. The UE variously introduces a precoder applied to neighboring PRBs scheduled in the UE according to whether the MIMO set in the UE is the closed-loop MIMO or the open-loop MIMO.

主权项

1. A method for receiving downlink (DL) data by a user equipment (UE), the method comprising:
receiving the DL data through a physical downlink shared channel (PDSCH); and decoding the DL data using a UE specific reference signal (UE-RS) received on physical resource blocks (PRBs) allocated to the PDSCH, wherein the DL data is decoded under either a first assumption that PRB bundling is enabled, or under a second assumption that the PRB bundling is disabled, wherein the DL data is decoded under the first assumption if a precoding matrix index (PMI) is configured to be fed back together with rank information (RI) or a channel quality index (CQI), and if a resource allocation type for the PDSCH is not a distributed type but is a localized type, and wherein, under the first assumption, a same precoder is applied to all of the PRBs allocated to the PDSCH among a predetermined number of contiguous PRBs belonging to a PRB group (PRG).