公开(公告)号：US20180167124A1

公开(公告)日：2018-06-14

申请号：US15579122

申请日：2016-05-23

Applicant: China Academy of Telecommunications Technology

Inventor： Runhua CHEN ,  Qiubin GAO ,  Tamrakar RAKESH

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0632 ,  H04B7/0639 ,  H04W24/10 ,  H04W72/0413 ,  H04W88/02

Abstract: Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale CSI feedback under an antenna system, wherein a UE may only need to feedback some pieces of PMI information, so that the complexity of the UE feeding back CSI is reduced, and the flexibility for a network side to control the UE to feed back the CSI is better. The channel state information (CSI) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (UE) to feed back CSI, the CSI at least comprising a first precoding matrix indicator (PMI) and a second PMI, the first PMI and the second PMI corresponding to the same precoding matrix; and the base station sending trigger signaling of CSI feedback to the UE, wherein indication information used for instructing whether the UE feeds back the first PMI and/or the second PMI is comprised.