公开(公告)号：US12224957B2

公开(公告)日：2025-02-11

申请号：US18630875

申请日：2024-04-09

Applicant: Sun Patent Trust

Inventor： Takashi Iwai ,  Sadaki Futagi ,  Tomohumi Takata ,  Daichi Imamura ,  Yoshihiko Ogawa

IPC: H04L5/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

Abstract: Disclosed are a wireless transmitter and a reference signal transmission method that improve channel estimation accuracy. In a terminal, which transmits a reference signal using n (n is a non-negative integer 2 or greater) band blocks (which correspond to clusters here), which are disposed with spaces therebetween in a frequency direction, a reference signal controller switches the reference signal formation method of a reference signal generator between a first formation method and a second formation method based on the number (n) of band blocks. In addition, a threshold value setting unit adjusts a switching threshold value based on the frequency spacing between band blocks. Thus, the reference signal formation method can be selected with good accuracy and, as a result, channel estimation accuracy is further improved.

公开(公告)号：US11825426B2

公开(公告)日：2023-11-21

申请号：US17959071

申请日：2022-10-03

Applicant: Sun Patent Trust

Inventor： Takashi Iwai ,  Akihiko Nishio ,  Daichi Imamura ,  Yoshihiko Ogawa ,  Atsushi Matsumoto

IPC: H04L5/00 ,  H04W52/36 ,  H04W72/044

CPC classification number: H04W52/365 ,  H04L5/0007 ,  H04L5/0053 ,  H04W72/0473

Abstract: A radio communication apparatus is provided, which includes a receiver and a controller. The receiver, in operation, receives a first power headroom (PHR), which is obtained by subtracting a transmit power for a data channel from a maximum transmit power at a mobile station and which is transmitted from the mobile station, and receives a second PHR, which is obtained by subtracting the transmit power for the data channel and a transmit power for a control channel from the maximum transmit power at the mobile station and which is transmitted from the mobile station. The controller, in operation, selectively sets a simultaneous transmission of the data channel and the control channel in different frequency bands to be performed by the mobile station. When the data channel and the control channel are simultaneously transmitted in different frequency bands from the mobile station, the second PHR is obtained and transmitted from the mobile station.

公开(公告)号：US11751143B2

公开(公告)日：2023-09-05

申请号：US17731087

申请日：2022-04-27

Applicant: Sun Patent Trust

Inventor： Takashi Iwai ,  Daichi Imamura ,  Akihiko Nishio ,  Yoshihiko Ogawa ,  Shinsuke Takaoka

IPC: H04W52/24 ,  H04W52/14 ,  H04W52/16 ,  H04W52/32 ,  H04L5/00 ,  H04W72/044

CPC classification number: H04W52/241 ,  H04L5/0048 ,  H04L5/0051 ,  H04W52/146 ,  H04W52/16 ,  H04W52/325 ,  H04W72/0473

Abstract: Disclosed is a wireless communication device that can suppress an increase in power consumption of a terminal while preventing the degradation of SINR measurement precision resulting from TPC errors in a base station. A terminal controls the transmission power of a second signal by adding an offset to the transmission power of a first signal; an offset-setting unit sets an offset correction value in response to a transmission time gap between a third signal transmitted the previous time and the second signal transmitted this time; and a transmission power control unit controls the transmission power of the second signal using the correction value.

公开(公告)号：US11431429B2

公开(公告)日：2022-08-30

申请号：US17005072

申请日：2020-08-27

Applicant: Sun Patent Trust

Inventor： Yoshihiko Ogawa ,  Akihiko Nishio ,  Takashi Iwai ,  Seigo Nakao ,  Daichi Imamura ,  Atsushi Sumasu

IPC: H04J11/00 ,  H04B7/0452 ,  H04J13/00 ,  H04J13/18 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12 ,  H04W88/02 ,  H04W88/08

Abstract: A terminal apparatus includes circuitry and a transmitter. The circuitry, in operation, generates a reference signal using a cyclic shift value and an orthogonal sequence, which are associated with each other. The orthogonal sequence is one of two orthogonal sequences corresponding to a first orthogonal sequence [1, 1] and a second orthogonal sequence [1, −1]. The cyclic shift value is one of 12 cyclic shift values ranging from 0 to 11. The transmitter, in operation, transmits the reference signal multiplexed with a data signal. Two of the cyclic shift values having a difference of 6 are respectively associated with the two orthogonal sequences.

公开(公告)号：US11356960B2

公开(公告)日：2022-06-07

申请号：US16723123

申请日：2019-12-20

Applicant: Sun Patent Trust

Inventor： Shinsuke Takaoka ,  Hidetoshi Suzuki ,  Akihiko Nishio ,  Takashi Iwai

IPC: H04W52/30 ,  H04W52/36 ,  H04W52/34 ,  H04W52/42 ,  H04L5/00 ,  H04W28/02 ,  H04W52/14

Abstract: Provided are a wireless communication terminal device and a power allocation method, wherein transmission channel quality information, regarding a Pcell having a high probability that UCI is multiplied therein, can be accurately estimated by an SRS having high priority in power allocation, and an eNB can instruct appropriate transmission power to an UL channel which transmits the subsequent UCI. A power scaling detection unit detects whether or not a total transmission power value of the UL channels transmitted by the plurality of CC exceeds the maximum transmission power specific to the UE. When a plurality of SRS are simultaneously transmitted using a Pcell and a Scell, and power scaling occurs, a power scaling control unit performs power allocation so that transmission power of the SRS of the Pcell has the higher priority than that of the SRS of the Scell.

公开(公告)号：US11330618B2

公开(公告)日：2022-05-10

申请号：US16896968

申请日：2020-06-09

Applicant: Sun Patent Trust

Inventor： Yoshihiko Ogawa ,  Akihiko Nishio ,  Daichi Imamura ,  Seigo Nakao ,  Masayuki Hoshino ,  Takashi Iwai ,  Sadaki Futagi

IPC: H04W72/12 ,  H04L27/26 ,  H04L1/00 ,  H04W72/04 ,  H04L5/00 ,  H04W28/06 ,  H04W84/04

Abstract: Communication apparatuses and methods reduce the amount of signaling while maintaining a high scheduling gain. A determination unit stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality that is output by an estimation unit, and the maximum value for the number of clusters that is output by the determination unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.

公开(公告)号：US20210007153A1

公开(公告)日：2021-01-07

申请号：US17029482

申请日：2020-09-23

Applicant: Sun Patent Trust

Inventor： Akihiko Nishio ,  Masayuki Hoshino ,  Hidetoshi Suzuki ,  Takashi Iwai

IPC: H04W74/08 ,  H04W56/00 ,  H04J3/06 ,  H04J11/00 ,  H04B7/26 ,  H04W74/00

Abstract: In order to provide a transmission device and transmission method with which a response signal for random access preamble transmitted from a preamble transmission device is efficiently transmitted, setting unit in base station sets a first resource candidate group, which enables terminal capable of receiving a latch response transmitted by demodulation reference signal (DMRS) transmission to be selected, and a second resource candidate group, which enables terminal incapable of receiving a latch response transmitted by DMRS transmission but capable of receiving a latch response transmitted by cell-specific reference signal (CRS) transmission to be selected. Control unit selects DMRS transmission as the latch response transmission method when a resource in which latch preamble has been received is included in the first candidate group, but selects CRS transmission as the latch response transmission method when the resource is included in the second resource candidate group.

公开(公告)号：US10826638B2

公开(公告)日：2020-11-03

申请号：US16363095

申请日：2019-03-25

Applicant: Sun Patent Trust

Inventor： Takashi Iwai ,  Daichi Imamura ,  Akihiko Nishio ,  Yoshihiko Ogawa ,  Masaru Fukuoka

IPC: H04J11/00 ,  H04B1/713 ,  H04B17/354 ,  H04B7/024 ,  H04J13/00 ,  H04L1/20 ,  H04L5/00 ,  H04L1/00

Abstract: Provided are a wireless communication apparatus and a reference signal generating method, wherein inter-cell interference is reduced inside and outside a CoMP set. A CoMP mode setting unit (101) sets whether the terminal (100) thereof is a CoMP terminal or a Non-CoMP terminal. When the terminal (100) is set as a Non-CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, from among all the ZC sequence numbers that can be used within the system. When the terminal (100) is set as a CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, by hopping the ZC sequence numbers to be used within the CoMP set. A ZC sequence generating unit (105) generates a ZC sequence to be used as an SRS, using the calculated ZC sequence number.

公开(公告)号：US10716132B2

公开(公告)日：2020-07-14

申请号：US16053241

申请日：2018-08-02

Applicant: SUN PATENT TRUST

Inventor： Yoshihiko Ogawa ,  Akihiko Nishio ,  Daichi Imamura ,  Seigo Nakao ,  Masayuki Hoshino ,  Takashi Iwai ,  Sadaki Futagi

IPC: H04W72/12 ,  H04W52/14 ,  H04L5/00 ,  H04L1/18 ,  H04L27/26 ,  H04L1/00 ,  H04W72/04 ,  H04W28/06 ,  H04W84/04

Abstract: A wireless communication base station device, terminal device, and method have reduced signaling while maintaining high scheduling gain. A judgment unit pre-stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality, and the maximum value for the number of clusters that is output by the judgment unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.

公开(公告)号：US10667263B2

公开(公告)日：2020-05-26

申请号：US16053256

申请日：2018-08-02

Applicant: SUN PATENT TRUST

Inventor： Yoshihiko Ogawa ,  Seigo Nakao ,  Daichi Imamura ,  Akihiko Nishio ,  Masayuki Hoshino ,  Katsuhiko Hiramatsu ,  Kenichi Miyoshi ,  Yasuaki Yuda ,  Sadaki Futagi ,  Takashi Iwai

IPC: H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04L25/02 ,  H04L27/26 ,  H04L25/03

Abstract: Disclosed are a wireless communication base station device and a division number determination method that improve the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.