公开(公告)号：US10405323B2

公开(公告)日：2019-09-03

申请号：US15000275

申请日：2016-01-19

Applicant: NTT DoCoMo, Inc.

Inventor： Yang Lan ,  Anxin Li ,  Huiling Jiang

IPC: H04W72/08 ,  H04L1/00 ,  H04L1/20 ,  H04L5/00 ,  H04W72/04 ,  H04L1/16

Abstract: The present disclosure provides a method, User Equipment (UE) and base station for adjusting a Modulation and Coding Scheme (MCS). The method comprises: receiving, by a user equipment (UE), a first downlink data frame sent by a base station at a first moment, and estimating, by the UE, a first Signal to Interference and Noise Ratio (SINR) and a first Channel Quality Indicator (CQI) according to the first downlink data frame; estimating a second SINR and a second CQI according to a received second downlink data frame, wherein the second downlink data frame is sent by the base station at a second moment later than the first moment; calculating, by the UE, a MCS variation according to at least one of the first CQI, the second CQI, the first SINR or the second SINR; and feeding back, by the UE, the MCS variation to the base station.

公开(公告)号：US10205621B2

公开(公告)日：2019-02-12

申请号：US14813920

申请日：2015-07-30

Applicant: NTT DoCoMo, Inc.

Inventor： Chunlin Yan ,  Anass Benjebbour ,  Yang Lan ,  Anxin Li ,  Huiling Jiang

IPC: H04L27/34 ,  H04L5/00 ,  H04W72/04

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

公开(公告)号：US10211894B2

公开(公告)日：2019-02-19

申请号：US15744117

申请日：2016-07-12

Applicant: NTT DOCOMO, INC.

Inventor： Yang Lan ,  Anxin Li ,  Huiling Jiang

IPC: H04K1/10 ,  H04L27/28 ,  H04B7/0456 ,  H04B7/04 ,  H04B17/309 ,  H04W72/12

Abstract: Disclosed are a downlink precoding method and a base station. The method includes: configuring a first precoding mode for a first cell, wherein the first precoding mode includes information of a precoding matrix configured for each candidate user of the first cell on each resource; selecting a scheduling user on each resource from candidate users according to the first precoding mode; and performing precoding to a channel estimation signal and downlink data of the scheduling user according to a precoding matrix of the scheduling user, and transmitting precoded channel estimation signal and precoded downlink data to the scheduling user. Such method and base station of the present disclosure can reduce the feedback overhead of the user, effectively improve the accuracy of channel quality indicator (CQI) estimation, and improve the system throughput and user throughput.

公开(公告)号：US20160036619A1

公开(公告)日：2016-02-04

申请号：US14813920

申请日：2015-07-30

Applicant: NTT DoCoMo, Inc.

Inventor： Chunlin YAN ,  Anass Benjebbour ,  Yang Lan ,  Anxin Li ,  Huiling Jiang

IPC: H04L27/34 ,  H04W72/04

CPC classification number: H04L27/3483 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0069 ,  H04L27/3488 ,  H04W72/042 ,  H04W72/0453

Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.

Abstract translation: 提供发送装置和发送方法。 发送装置包括：编码器，被配置为分别将多个用户设备的数据编码为相应的编码信号; 调制器，被配置为对多个用户设备的编码信号执行联合调制以产生调制信号，其中调制器通过将用于多个用户设备的编码信号的比特映射到对应于每个星座的符号来执行联合调制 点的调制信号的星座图，使得各个星座点满足灰色映射规则; 发射机，被配置为发送调制信号。