公开(公告)号：US20170244513A1

公开(公告)日：2017-08-24

申请号：US15521844

申请日：2014-10-29

Applicant: NEC Corporation

Inventor： Boonsarn PITAKDUMRONGKIJA ,  Naoto ISHII

IPC: H04L1/00 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0456

CPC classification number: H04L1/0003 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04L1/0026 ,  H04L5/0048 ,  H04L5/0053 ,  H04L25/0391

Abstract: Provided a method in a mobile communication system comprising a base station adapted to create a precoding matrix for applying to data to be transmitted to a user terminal by using a channel estimate determined from a Reference Signal (RS) transmitted from the user terminal to the base station, the user terminal being adapted to transmit to the base station a Channel State Information (CSI) report, wherein the method comprises: the base station creating a relationship between the received CSI report and Interference pluses Noise covariance matrix that reflects amount of interference and noise observed at the user terminal's antennas, the base station determining the Interference pluses Noise covariance matrix based on the created relationship, and the base station using the determined Interference pluses Noise covariance matrix to estimate SINR for each data layer conditioned on the precoding matrix.

公开(公告)号：US20190319687A1

公开(公告)日：2019-10-17

申请号：US16463444

申请日：2016-12-08

Applicant: NEC Corporation

Inventor： Boonsarn PITAKDUMRONGKIJA

IPC: H04B7/06 ,  H04B7/0408 ,  H04W72/08 ,  H04W72/12 ,  H04B17/318 ,  H04B7/0404

Abstract: A base station calculates at least a metric representing a signal quality of a pilot signal transmitted from a user terminal (UT), categorizes the UT into two types based on the metric, for a first type, performing beamforming on the antennas to a predetermined number of directions and then performing channel estimation for the beamformed directions, while for a second type UT, performing channel estimation without performing beamforming on the antennas.

公开(公告)号：US20150304018A1

公开(公告)日：2015-10-22

申请号：US14380674

申请日：2013-02-21

Applicant: NEC CORPORATION

Inventor： Boonsarn PITAKDUMRONGKIJA ,  Yoshikazu KAKURA ,  Naoto ISHII

IPC: H04B7/155 ,  H04W72/04

CPC classification number: H04B7/15592 ,  H04W16/26 ,  H04W72/0446 ,  H04W72/082 ,  H04W84/047 ,  H04W92/20

Abstract: A communication system includes a plurality of DeNBs (base stations) and a plurality of RNs (relay nodes), wherein each RN has a radio connection with a DeNB. Each DeNB acquires time resource configuration applied between another base station and a relay node connected with said another base station.

Abstract translation: 通信系统包括多个DeNB（基站）和多个RN（中继节点），其中每个RN具有与DeNB的无线电连接。 每个DeNB获取在另一基站和与所述另一基站连接的中继节点之间应用的时间资源配置。