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：US20190215818A1

公开(公告)日：2019-07-11

申请号：US16328838

申请日：2017-08-30

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Shaozhen Guo ,  Lihui Wang ,  Liu Liu ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/04 ,  H04W72/12

CPC classification number: H04W72/0406 ,  H04W28/04 ,  H04W72/04 ,  H04W72/12 ,  H04W72/1289 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/126

Abstract: The present invention is designed so that the transmission of PUSCH can be controlled properly when the reference value for the timing for transmitting signals is controlled in radio base stations and/or user terminals. A user terminal, according to the present invention, has a receiving section that receives downlink control information (DCI), and a control section that controls transmission of an uplink (UL) shared channel that is scheduled by the DCI, and the control section controls the transmission of the UL shared channel based on a reference value that is configured for the timing for transmitting the UL shared channel.

公开(公告)号：US20190190763A1

公开(公告)日：2019-06-20

申请号：US16322581

申请日：2017-08-03

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang ,  Can Li ,  Yong Li ,  Wenbo Wang

IPC: H04L27/26 ,  H04L5/00 ,  H04W28/06 ,  H04W72/04

CPC classification number: H04L27/2662 ,  H04L5/0053 ,  H04L27/2676 ,  H04W28/06 ,  H04W72/04 ,  H04W72/0413

Abstract: The present invention is designed to properly transmit demodulation reference signals for UL data channels in short TTIs. A user terminal according to one aspect of the present invention has a transmission section that transmits a demodulation reference signal for an uplink (UL) data channel, and a control section that controls the transmission of the demodulation reference signal, and, when the UL data channel is transmitted in a second transmission time interval (TTI), which is comprised of a smaller number of symbols than a first TTI, the control section maps the demodulation reference signal to a symbol that is selected based on the arrangement pattern of the second TTI.

公开(公告)号：US20190182822A1

公开(公告)日：2019-06-13

申请号：US16301520

申请日：2017-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuaki Takeda ,  Naoto Ookubo ,  Jiahui Liu ,  Qin Mu ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/04 ,  H04L29/08 ,  H04W68/02

Abstract: The present invention provides a method for allowing user terminal to acquire information about paging physical resource blocks (PRBs), a method of allowing a base station to indicate information about paging PRBs to UE, a method of allowing UE to determine allocation of paging PRBs, a method of allowing a base station to allocate paging PRBs, a base station and UE. The above method of allowing user terminal to acquire information about paging physical resource blocks (PRBs) includes detecting an anchor PRB, reading information carried by the anchor PRB, and acquiring information about the non-anchor paging PRBs associated with the anchor PRB based on the information carried by the anchor PRB. By this method, non-anchor paging PRBs can be specified to the UE.

公开(公告)号：US10298308B2

公开(公告)日：2019-05-21

申请号：US15058552

申请日：2016-03-02

Applicant: NTT DoCoMo, Inc.

Inventor： Xiaohang Chen ,  Anxin Li ,  Huiling Jiang

IPC: H04B7/06 ,  H04W72/12 ,  H04L25/03 ,  H04W72/06 ,  H04B7/0426 ,  H04B7/0452 ,  H04B17/26 ,  H04L5/00

Abstract: Embodiments of present invention provide a method for optimizing the rank of channel matrix, a wireless base and a mobile station. The method for optimizing the rank of channel matrix according to an embodiment of the present invention is applied to a wireless base to which multiple mobile stations are connected. The method includes: obtaining the historical state data of the multiple mobile stations; determining the optimal rank of channel matrix of a first mobile station of the multiple mobile stations according to the obtained historical state data of the multiple mobile stations; and transmitting to the first mobile station the optimal rank indicator indicating the optimal rank so as to cause the first mobile station to set its rank of channel matrix to be the optimal rank indicated by the optimal rank indicator.

公开(公告)号：US20190116547A1

公开(公告)日：2019-04-18

申请号：US16088740

申请日：2017-03-29

Applicant: NTT DOCOMO, INC.

Inventor： Yousuke Sano ,  Kazuaki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Huiling Jiang

IPC: H04W48/14 ,  H04W28/02 ,  H04W48/10 ,  H04W76/14 ,  H04W74/08 ,  H04W24/08 ,  H04W88/10

Abstract: A user equipment in a mobile communication system including a base station and the user equipment, including: a mode determining unit that receives instruction information indicating a transmission mode of broadcast information from the base station and determines the transmission mode based on the instruction information; and a receiving unit that performs a reception operation of the broadcast information according to the transmission mode determined by the mode determining unit.

公开(公告)号：US20190090251A1

公开(公告)日：2019-03-21

申请号：US15762962

申请日：2016-09-23

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Jing Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/08 ,  H04L5/00 ,  H04W48/08

Abstract: A radio base station that communicates with a user terminal by using a plurality of component carriers (CCs) in which listening is configured, includes a transmitter that transmits downlink (DL) signals in each CC; and a processor that controls transmission of the DL signals in each CC based on a result of the listening in the plurality of CCs. The processor controls allocation of power based on a total number of CCs that make transmission in each subframe after the listening.

公开(公告)号：US10225763B2

公开(公告)日：2019-03-05

申请号：US15044410

申请日：2016-02-16

Applicant: NTT DoCoMo, Inc.

Inventor： Anxin Li ,  Huiling Jiang

IPC: H04W28/06 ,  H04L1/18 ,  H04W52/24 ,  H04W72/12 ,  H04W52/34

Abstract: The present disclosure provides a method for re-transmitting data, wherein the method at a User Equipment (UE) side comprises: receiving, by a UE, a re-transmitted data packet from a base station, determining whether to perform data combination according to a Signal to Interference-Noise Ratio (SINR) of a first-transmitted data packet and a SINR of the re-transmitted data packet; when it is determined to perform data combination, performing, by the UE, data combination for the re-transmitted data packet according to information buffered by the UE and detecting the re-transmitted data packet according to a result of performed data combination; or when it is determined not to perform data combination, detecting, by the UE, the re-transmitted data packet. The present disclosure also provides a method for re-transmitting data at a base station side and a UE for implementing the above method.

公开(公告)号：US20180279283A1

公开(公告)日：2018-09-27

申请号：US15761929

申请日：2016-09-08

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/04 ,  H04W24/10 ,  H04L5/00

CPC classification number: H04W72/044 ,  H04L5/0055 ,  H04W24/10 ,  H04W72/04 ,  H04W72/0413

Abstract: The present invention is designed so that UL transmission can be made adequately even when channel state information of a plurality of CCs is transmitted. A user terminal can communicate with a radio base station by using a plurality of component carriers (CCs), and has a transmission section that transmits delivery acknowledgment signals for one or more CCs and/or channel state information of a plurality of CCs, in a predetermined subframe, in an uplink control channel, and a control section that performs control so that part or all of the channel state information of the plurality of CCs is dropped when transmission power configured for UL transmission in the predetermined subframe exceeds a predetermined value.

公开(公告)号：US20180255566A1

公开(公告)日：2018-09-06

申请号：US15970111

申请日：2018-05-03

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/12 ,  H04W72/14 ,  H04L5/00

Abstract: A user terminal is disclosed that is configurable with a plurality of component carriers. The user terminal has a receiver that receives at least one of downlink control information and Radio Resource Control (RRC) signaling, a transmitter that transmits uplink control information (UCI), which includes at least delivery acknowledgment information, in a specific resource, by using a specific Physical Uplink Control Channel (PUCCH) format (PF), and a processor that executes control to select the specific PF and the specific resource based on a payload size of at least a part of the UCI.