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公开(公告)号：US11671963B2
公开(公告)日：2023-06-06
申请号：US17471627
申请日：2021-09-10
Applicant: NEC Corporation
Inventor： Le Liu , Yoshikazu Kakura , Naoto Ishii , Takamichi Inoue
CPC classification number: H04W72/1273 , H04B7/024 , H04J11/0053 , H04L5/0035 , H04L5/0053 , H04W48/12 , H04W72/12 , H04W72/23 , H04W84/042
Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
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2.发明授权公开(公告)号：US11405901B2
公开(公告)日：2022-08-02
申请号：US16898708
申请日：2020-06-11
Applicant: NEC CORPORATION
Inventor： Kenji Koyanagi , Takamichi Inoue , Le Liu , Yoshikazu Kakura
Abstract: Provided is a technique capable of reporting resource block allocation information with no waste when an allocated resource block is reported, because in the current LTE downlink, the waste of the amount of resource allocation information increases in some cases since a restriction is imposed such that 37-bit fixed scheduling information is transmitted. A resource block group consisting of at least one or more resource blocks continuous on the frequency axis is allocated to a terminal, and the number of controlling signals for reporting allocation information indicating the allocated resource blocks is determined.
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3.发明授权公开(公告)号：US11057178B2
公开(公告)日：2021-07-06
申请号：US16504031
申请日：2019-07-05
Applicant: NEC CORPORATION
Inventor： Takamichi Inoue , Yoshikazu Kakura
Abstract: A reference signal multiplexing method for multiple mobile stations includes: grouping together control signals for the multiple mobile stations; and multiplexing reference signals corresponding to the control signals by CDM over the same bandwidth as that of grouped control signals.
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公开(公告)号：US10716106B2
公开(公告)日：2020-07-14
申请号：US16105024
申请日：2018-08-20
Applicant: NEC CORPORATION
Inventor： Kenji Koyanagi , Takamichi Inoue , Le Liu , Yoshikazu Kakura
Abstract: To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.
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公开(公告)号：US10117250B2
公开(公告)日：2018-10-30
申请号：US15651341
申请日：2017-07-17
Applicant: NEC CORPORATION
Inventor： Takamichi Inoue , Kenji Koyanagi , Le Liu , Yoshikazu Kakura
Abstract: A base station includes a transmitter configured to transmit a downlink control information to a user equipment, the downlink control information being generated based on one of (1) a first uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and (2) a second uplink allocation information indicating a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency and a third frequency block corresponding to a third plurality of subcarriers which are contiguous in frequency, the second frequency block and the third frequency block being separated in frequency.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10028158B2
公开(公告)日：2018-07-17
申请号：US15668936
申请日：2017-08-04
Applicant: NEC Corporation
Inventor： Hisashi Futaki , Hiroaki Aminaka , Hiroto Sugahara , Yoshikazu Kakura , Kazushi Muraoka
IPC: H04W72/00 , H04W24/08 , H04W72/04 , H04W88/10 , H04W88/06 , H04W76/04 , H04W16/14 , H04W88/02 , H04B17/318 , H04W72/08 , H04B17/309 , H04L5/00 , H04B17/382 , H04B17/24 , H04W76/27
Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).
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公开(公告)号：US09787421B2
公开(公告)日：2017-10-10
申请号：US15075947
申请日：2016-03-21
Applicant: NEC Corporation
Inventor： Kengo Oketani , Yoshikazu Kakura
CPC classification number: H04L5/0044 , H04B2201/70701 , H04J13/0059 , H04J13/0062 , H04J13/16 , H04L5/0007 , H04L5/0048 , H04W28/04 , H04W72/04 , H04W72/0406 , H04W72/042 , H04W72/0446
Abstract: A device and method in which plurality of Zadoff-Chu sequences is allocated to a frame, a value of a parameter in the Zadoff-Chu sequence is different among the plurality of Zadoff-Chu sequences, and the Zadoff-Chu sequence allocated to the frame is different among a plurality of cells.
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8.发明授权公开(公告)号：US09787378B2
公开(公告)日：2017-10-10
申请号：US14764736
申请日：2014-01-27
Applicant: NEC Corporation
Inventor： Shinichi Tajima , Naoto Ishii , Yoshikazu Kakura
CPC classification number: H04B7/0456 , H04B7/0478 , H04B7/0617 , H04B7/0639 , H04B7/086 , H04W88/02 , H04W88/08
Abstract: A communication system, a terminal apparatus, a base station apparatus, and a method for sharing a codebook are provided that make it possible to improve system capacity by using precoding according to a cell environment. In a communication system in which beam directivity control is performed by precoding using a codebook that is common between a base station (10) and a terminal (20), the base station (10) notifies the terminal (20) information for codebook determination k including cell (11)-specific information on the base station, and the base station (10) and the terminal (20) generate the common codebook based on the information for codebook determination.
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公开(公告)号：US20240080841A1
公开(公告)日：2024-03-07
申请号：US18508558
申请日：2023-11-14
Applicant: NEC Corporation
Inventor： Le LIU , Yoshikazu Kakura , Naoto Ishll , Takamichi Inoue
CPC classification number: H04W72/1273 , H04B7/024 , H04J11/0053 , H04L5/0035 , H04L5/0053 , H04W48/12 , H04W72/12 , H04W72/23 , H04W84/042
Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.
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10.发明公开公开(公告)号：US20230171754A1
公开(公告)日：2023-06-01
申请号：US18100899
申请日：2023-01-24
Applicant: NEC Corporation
Inventor： Takamichi Inoue , Kenji Koyanagi , Le Liu , Yoshikazu Kakura
CPC classification number: H04W72/0453 , H04L5/0041 , H04L5/0007 , H04L5/0037 , H04L5/0044 , H04L5/0048 , H04L5/006 , H04L5/0064 , H04L5/0094 , H04L27/2614 , H04W72/20 , H04W72/21 , H04W72/23 , H04L5/0057 , H05K999/99 , H04W88/02
Abstract: A base station includes a transmitter configured to transmit a downlink control information to a user equipment, the downlink control information being generated based on one of (1) a first uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and (2) a second uplink allocation information indicating a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency and a third frequency block corresponding to a third plurality of subcarriers which are contiguous in frequency, the second frequency block and the third frequency block being separated in frequency.
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