公开(公告)号：US10461832B2

公开(公告)日：2019-10-29

申请号：US15745122

申请日：2016-07-19

Applicant: China Academy of Telecommunications Technology

Inventor： Wenhong Chen ,  Qiubin Gao ,  Hui Li ,  Tamrakar Rakesh ,  Runhua Chen

IPC: H04B7/06 ,  H04B7/04 ,  H04W24/10 ,  H04W72/04

Abstract: Disclosed are a channel status information (CSI) feedback and control method and device. The method comprises: a terminal receives trigger signaling sent by a base station, the trigger signaling being used for instructing the terminal to report CSI obtained within a specified measurement window; and the terminal reports the CSI that is measured by the terminal within the specified measurement window to the base station. Because a terminal reports only CSI that is measured by the terminal within a specified measurement window, the frequency of feeding back CSI by the terminal is reduced, and CSI feedback overheads are also reduced.

公开(公告)号：US10367564B2

公开(公告)日：2019-07-30

申请号：US15749054

申请日：2016-07-25

Applicant: China Academy of Telecommunications Technology

Inventor： Wenhong Chen ,  Runhua Chen ,  Tamrakar Rakesh ,  Qiubin Gao ,  Hui Li

IPC: H04L5/12 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/0417 ,  H04L1/00 ,  H04L5/00 ,  H04W72/04

Abstract: The present invention discloses a channel state information (CSI) feedback method and related device for an FD MIMO system, and is configured to support the scenario in which various CSI related information needs to be fed back after a CSI measurement in an FD MIMO system. The method comprises: a terminal receives a CSI feedback configuration group indicated by a base station and configuration information for performing a CSI feedback based on the CSI feedback configuration group; and the terminal performs a CSI measurement and feedback according to the CSI feedback configuration group and the configuration information, wherein the CSI feedback configuration group comprises at least one CSI feedback configuration, and the CSI feedback configuration is a downlink signal configuration for a downlink CSI measurement and feedback.

公开(公告)号：US09780858B2

公开(公告)日：2017-10-03

申请号：US15328489

申请日：2015-07-17

Applicant: China Academy of Telecommunications Technology

Inventor： Hui Li

IPC: H04W72/00 ,  H04B7/06 ,  H04L5/00 ,  H04W24/02 ,  H04B17/327

CPC classification number: H04B7/0617 ,  H04B7/04 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0695 ,  H04B17/327 ,  H04L1/06 ,  H04L5/0048 ,  H04W24/02

Abstract: The embodiments of the present invention relate to the field of wireless communications, and more particularly, to a method and apparatus for determining three-dimensional beam pre-coding information so as to perform three-dimensional beam forming. In the embodiments of the present invention, a network device first determines a first optimal beam forming vector, and then determines a second optimal beam forming vector from a second beam forming vector set corresponding to the first optimal beam forming vector and performs channel measurement via a formed pilot to determine optimal pre-coding information about a second dimension. Since an optimal beam forming vector therein is determined based on a beam forming vector set with a coarse particle granularity, and then an optimal beam forming vector therein is determined based on a corresponding beam forming vector set with a fine particle granularity, the purpose of determining the optimal beam forming vector with fine particle granularity and the optimal pre-coding information is achieved, which, compared with the prior art, reduces system resource expense, and further reduces the complexity of a user equipment.