公开(公告)号：US11528627B2

公开(公告)日：2022-12-13

申请号：US17229077

申请日：2021-04-13

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08 ,  H04W88/06

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).

公开(公告)号：US20220295460A1

公开(公告)日：2022-09-15

申请号：US17828098

申请日：2022-05-31

Applicant: NEC Corporation

Inventor： Kenji KOYANAGI ,  Takamichi Inoue ,  Le Liu ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00

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.

公开(公告)号：US20220247524A1

公开(公告)日：2022-08-04

申请号：US17725760

申请日：2022-04-21

Applicant: NEC Corporation

Inventor： Yoshikazu Kakura

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08

Abstract: In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.

公开(公告)号：US11082175B2

公开(公告)日：2021-08-03

申请号：US16655493

申请日：2019-10-17

Applicant: NEC Corporation

Inventor： Kengo Oketani ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L5/00 ,  H04J13/00 ,  H04W28/04 ,  H04J13/16

Abstract: A device and method in which a 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.

公开(公告)号：US11012876B2

公开(公告)日：2021-05-18

申请号：US16932126

申请日：2020-07-17

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08 ,  H04W88/06

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).

公开(公告)号：US10805929B2

公开(公告)日：2020-10-13

申请号：US16149362

申请日：2018-10-02

Applicant: NEC CORPORATION

Inventor： Takamichi Inoue ,  Kenji Koyanagi ,  Le Liu ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04W88/02 ,  H04W88/08

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.

公开(公告)号：US10750389B2

公开(公告)日：2020-08-18

申请号：US16692460

申请日：2019-11-22

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W72/00 ,  H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08 ,  H04W88/06

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).

公开(公告)号：US10524146B2

公开(公告)日：2019-12-31

申请号：US16255408

申请日：2019-01-23

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W72/00 ,  H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08 ,  H04W88/06

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).

公开(公告)号：US09735938B2

公开(公告)日：2017-08-15

申请号：US15075346

申请日：2016-03-21

Applicant: NEC CORPORATION

Inventor： Takamichi Inoue ,  Yoshikazu Kakura

IPC: H04L5/00 ,  H04W28/20 ,  H04L27/26 ,  H04J13/00

CPC classification number: H04L5/005 ,  H04B2201/70701 ,  H04J13/0059 ,  H04J13/0077 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04W28/20

Abstract: In a radio communication system, transmission of CAZAC sequences as the pilot signal sequences by using code division multiplexing as at least one of user multiplexing schemes, is done by dividing a system band as a frequency band usable in the system into frequency blocks B1 and B2 having bandwidths W1 and W2, generating the pilot signals of the frequency blocks B1 and B2 with a single carrier, using the pilot signal sequences having sequence lengths L1 and L2 corresponding to frequency blocks B1 and B2 respectively; and, transmitting the generated pilot signals as the pilot signals corresponding individual users, with multicarriers using an arbitrary number of frequency blocks among the plural frequency blocks.

公开(公告)号：US09692570B2

公开(公告)日：2017-06-27

申请号：US15240042

申请日：2016-08-18

Applicant: NEC CORPORATION

Inventor： Takamichi Inoue ,  Yoshikazu Kakura

IPC: H04L5/00 ,  H04L1/16 ,  H04B7/216 ,  H04W72/04 ,  H04J13/00 ,  H04L27/26 ,  H04L1/00

CPC classification number: H04L5/005 ,  H04B7/216 ,  H04J13/0062 ,  H04L1/0026 ,  H04L1/1671 ,  H04L5/0016 ,  H04L5/0053 ,  H04L5/0092 ,  H04L27/2628 ,  H04W72/042

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.