公开(公告)号：US20240284291A1

公开(公告)日：2024-08-22

申请号：US18290477

申请日：2021-10-15

Applicant: NEC Corporation

Inventor： Kazushi MURAOKA ,  Toshiki TAKEUCHI ,  Yasushi MARUTA

IPC: H04W36/32 ,  H04W64/00

CPC classification number: H04W36/324 ,  H04W36/322 ,  H04W64/003

Abstract: In order to control radio communication with a terminal apparatus in accordance with a movement situation of the terminal apparatus, a radio control apparatus is configured to estimate a location of the terminal apparatus, estimate a type of the terminal apparatus, predict movement of the terminal apparatus based on the estimated location, predict a future location of the terminal apparatus, estimate, based on the estimated type, a reception level of a radio signal at the future location for each communication parameter, and determine the communication parameter to be used for the terminal apparatus at the future location, based on an estimation result of the reception level.

公开(公告)号：US20180279350A1

公开(公告)日：2018-09-27

申请号：US15763162

申请日：2016-09-02

Applicant: NEC Corporation

Inventor： Yi JIANG ,  Hisashi FUTAKI ,  Yasushi MARUTA

IPC: H04W72/12 ,  H04W24/08 ,  H04W52/02

CPC classification number: H04W72/1289 ,  H04W24/08 ,  H04W28/04 ,  H04W52/0225 ,  H04W52/0245 ,  H04W72/04 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264

Abstract: To provide a communication terminal capable of suppressing an increase in power consumption of a UE during multi-subframe scheduling, a communication terminal (10) includes a monitoring unit (11) that monitors control information containing allocation information of at least one subframe where downlink data is transmitted, and a control unit (12) that determines monitoring timing to monitor the control information in accordance with a decoding result of downlink data transmitted using the at least one subframe. The monitoring unit (11) monitors the control information at the determined monitoring timing.

公开(公告)号：US20160128038A1

公开(公告)日：2016-05-05

申请号：US14993636

申请日：2016-01-12

Applicant: NEC Corporation

Inventor： Yassin Aden AWAD ,  Yasushi MARUTA ,  Toshifumi SATO

IPC: H04W72/04

Abstract: A communication system is presented in which a base station is provided for communicating with a plurality of mobile communication devices in a cellular communication system. The base station operates one of more communication cells and communicates subframes, with each of the plurality of communication devices within the cell(s), each comprising the communication resources of a control region for communicating a control channel and the communication resources of a data region for communicating a respective data channel. The base station communicates a control channel having a first DMRS sequence in a control region of some subframes and a control channel having a second DMRS sequence in a control region of other subframes. The second control channel may be transmitted in a radio beam focussed spatially in a direction of a communication device. The first control channel may be transmitted omnidirectionally throughout the cell(s).

公开(公告)号：US20220278783A1

公开(公告)日：2022-09-01

申请号：US17627971

申请日：2020-07-30

Applicant: NEC Corporation

Inventor： Yi JIANG ,  Yasushi MARUTA

IPC: H04L5/00 ,  H04B1/715

Abstract: In order to improve communication in a radio access network, a base station 100 includes: a first communication processing unit 141 configured to communicate with a terminal apparatus 400A; and a second communication processing unit 143 configured to receive, from base stations 200 and 300 respectively communicating with terminal apparatuses 400B and 400C, radio resource time length information for specifying a time length of a radio resource for the terminal apparatuses 400B and 400C, and hopping pattern information for specifying a frequency hopping pattern for the terminal apparatuses 400B and 400C. The first communication processing unit 141 is configured to determine the frequency hopping pattern for the terminal apparatus 400A, based on the radio resource time length information and the hopping pattern information, and communicate with the terminal apparatus 400A in accordance with the determined frequency hopping pattern.

公开(公告)号：US20170195013A1

公开(公告)日：2017-07-06

申请号：US15314003

申请日：2015-03-19

Applicant: NEC Corporation

Inventor： Duong PHAM ,  Yasushi MARUTA

IPC: H04B7/04 ,  H04B7/06 ,  H01Q21/06 ,  H04B7/0452

CPC classification number: H04B7/046 ,  H01Q21/061 ,  H04B7/0452 ,  H04B7/0473 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0691

Abstract: A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

公开(公告)号：US20160164578A1

公开(公告)日：2016-06-09

申请号：US14903065

申请日：2014-08-05

Applicant: NEC CORPORATION

Inventor： Duong PHAM ,  Yasushi MARUTA

IPC: H04B7/02 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04L5/0035

Abstract: There is provided generating precoders for joint transmission (JT) in a downlink coordinated multi-point transmission/reception (DL COMP) wireless communications system. The system includes a plurality of transmission points (TPs) operable to communicate with a plurality of user equipments (UEs). Each UE has one of the TPs as its serving TP. The method includes transmitting channel state information (CSI) from each UE to its serving TP, wherein the transmitted CSI includes precoder matrix indicators (PMI), and using the PMI to generate precoders for transmission of data from the plurality of TPs to the plurality of UEs.

Abstract translation: 在下行链路协调多点发送/接收（DL COMP）无线通信系统中提供了用于联合传输（JT）的生成预编码器。 该系统包括可操作以与多个用户设备（UE）通信的多个传输点（TP）。 每个UE具有其中一个TP作为其服务TP。 该方法包括从每个UE向其服务TP发送信道状态信息（CSI），其中传输的CSI包括预编码器矩阵指示符（PMI），并且使用PMI来生成用于从多个TP传输数据到多个 UE。

公开(公告)号：US20250081224A1

公开(公告)日：2025-03-06

申请号：US18574798

申请日：2021-12-10

Applicant: NEC Corporation

Inventor： Toshiki TAKEUCHI ,  Kazushi MURAOKA ,  Yasushi MARUTA

IPC: H04W72/541 ,  H04W24/02

Abstract: A wireless base station includes an interference-sensing means for sensing the occurrence of interference at the wireless base station, an interference analysis means for executing analysis that is based on the result of sensing by the interference-sensing means and that includes estimation as to the continuity of the interference, and a wireless resource control means for executing wireless resource control for reducing the effect of the interference in accordance with the result of analysis by the interference analysis means. The continuity includes temporal continuity and/or spatial continuity.

公开(公告)号：US20200305135A1

公开(公告)日：2020-09-24

申请号：US16893736

申请日：2020-06-05

Applicant: NEC Corporation

Inventor： Yassin Aden AWAD ,  Yasushi MARUTA ,  Toshifumi SATO

IPC: H04W72/04

Abstract: A communication system is presented in which a base station is provided for communicating with a plurality of mobile communication devices in a cellular communication system. The base station operates one of more communication cells and communicates subframes, with each of the plurality of communication devices within the cell(s), each comprising the communication resources of a control region for communicating a control channel and the communication resources of a data region for communicating a respective data channel. The base station communicates a control channel having a first DMRS sequence in a control region of some subframes and a control channel having a second DMRS sequence in a control region of other subframes. The second control channel may be transmitted in a radio beam focussed spatially in a direction of a communication device. The first control channel may be transmitted omnidirectionally throughout the cell(s).

公开(公告)号：US20170085309A1

公开(公告)日：2017-03-23

申请号：US15312238

申请日：2015-03-19

Applicant: NEC Corporation

Inventor： Duong PHAM ,  Yasushi MARUTA

IPC: H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0639 ,  H04B7/0452 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04W88/02 ,  H04W88/08

Abstract: A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

公开(公告)号：US20220038166A1

公开(公告)日：2022-02-03

申请号：US17277018

申请日：2019-06-11

Applicant: NEC Corporation

Inventor： Yasushi MARUTA

IPC: H04B7/06 ,  H04B7/0452 ,  H04B17/345

Abstract: An object of the present disclosure is to provide a base station, a system, a method, and a program capable of improving DL MU-MIMO characteristics. A base station (11) according to the present disclosure includes: a calculation unit (111) that calculates a spatial multiplexing antenna weight VJL of each of a plurality of antennas (11an) owned by the base station (11) based on information about at least one spatial multiplexing terminal (12s) and Down Link (DL) channel information of the at least one spatial multiplexing terminal (12s); an interference elimination unit (112) that calculates an interference elimination antenna weight WJL that reduces interference power with respect to other terminals to a desired level or lower based on the spatial multiplexing antenna weight VJL, and calculates a desired signal power loss PLJL of the at least one spatial multiplexing terminal (12s) based on the spatial multiplexing antenna weight VJL and the interference elimination antenna weight WJL; and a selection unit (113) that excludes a terminal (12p) with excess loss in which the desired signal power loss PLJL is greater than a power loss threshold Pth from the at least one spatial multiplexing terminal (12s).