公开(公告)号：US20250150989A1

公开(公告)日：2025-05-08

申请号：US19014973

申请日：2025-01-09

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Yoshihiko OGAWA ,  Atsushi MATSUMOTO

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

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：US20250150232A1

公开(公告)日：2025-05-08

申请号：US19012499

申请日：2025-01-07

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：US20230370976A1

公开(公告)日：2023-11-16

申请号：US18354547

申请日：2023-07-18

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Daichi Imamura ,  Akihilo Nishio ,  Yoshihiko Ogawa ,  Shinsuke Takaoka

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

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

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：US20230370188A1

公开(公告)日：2023-11-16

申请号：US18360740

申请日：2023-07-27

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 ,  H04W72/23 ,  H04W72/54 ,  H04B7/06 ,  H04L5/00

CPC classification number: H04J11/003 ,  H04B7/0452 ,  H04J13/0048 ,  H04J13/18 ,  H04W72/23 ,  H04W72/54 ,  H04B7/0689 ,  H04L5/005 ,  H04W88/02

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：US20220312420A1

公开(公告)日：2022-09-29

申请号：US17839385

申请日：2022-06-13

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

Abstract: Disclosed are a wireless communication base station device and a division number determination method that improves 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.

公开(公告)号：US20200305185A1

公开(公告)日：2020-09-24

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

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：US20190199494A1

公开(公告)日：2019-06-27

申请号：US16287611

申请日：2019-02-27

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Sadaki FUTAGI ,  Tomohumi TAKATA ,  Daichi IMAMURA ,  Yoshihiko OGAWA

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

CPC classification number: H04L5/0048 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/03159 ,  H04L27/2613

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：US20180343657A1

公开(公告)日：2018-11-29

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 ,  H04L27/26

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.

公开(公告)号：US20170324532A1

公开(公告)日：2017-11-09

申请号：US15661566

申请日：2017-07-27

Applicant: Sun Patent Trust

Inventor： Takashi IWAI ,  Akihiko NISHIO ,  Yoshihiko OGAWA ,  Seigo NAKAO ,  Masayuki HOSHINO

IPC: H04L5/00 ,  H04J13/00 ,  H04J11/00 ,  H04L23/02 ,  H04B7/024 ,  H04L12/801 ,  H04L27/26 ,  H04B7/0452

CPC classification number: H04L5/0048 ,  H04B7/024 ,  H04B7/0452 ,  H04J11/0023 ,  H04J11/0026 ,  H04J11/0053 ,  H04J11/0056 ,  H04J13/0062 ,  H04L5/0032 ,  H04L5/0035 ,  H04L23/02 ,  H04L27/2613 ,  H04L47/34

Abstract: Provided are a radio communication terminal apparatus and a radio transmission method by which intersymbol interference of DM-RS of a CoMP terminal and a Non-CoMP terminal can be reduced. A CoMP set setting unit (102) sets the cell IDs of all cells in the CoMP set in a cell selection unit (104), and a serving cell setting unit (103) sets the cell ID of the serving cell in the cell selection unit (104). The cell selection unit (104) selects the cell ID having a number closest to the cell ID of the serving cell from the cells in the CoMP set. A sequence information calculation unit (106) derives a sequence group number from the selected cell ID, and the sequence information calculation unit (106) calculates a sequence number from the derived sequence group number and a transmission bandwidth of the DM-RS.

公开(公告)号：US20240333572A1

公开(公告)日：2024-10-03

申请号：US18744226

申请日：2024-06-14

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Akihiko NISHIO ,  Masayuki HOSHINO ,  Takashi IWAI

IPC: H04L27/26 ,  H04B7/06 ,  H04J13/00 ,  H04L5/00 ,  H04L69/324 ,  H04W24/10 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/20

CPC classification number: H04L27/2613 ,  H04B7/0615 ,  H04B7/0632 ,  H04B7/0684 ,  H04J13/004 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0058 ,  H04L5/0094 ,  H04L69/324 ,  H04W24/10 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/20

Abstract: Provided is a transmitter which improves the flexibility of SRS resource allocation without increasing the amount of signaling for notifying the cyclic shift amount. In the transmitter, with regard to each basic shift amount candidate group having a basic shift amount from 0 to N−1, a transmission control unit (206) specifies the actual shift amount imparted to a cyclic shift sequence used in scrambling a reference signal transmitted from each antenna port, said specification being performed based on a table in which cyclic shift amount candidates correspond to each antenna port, and based on setting information transmitted from a base station (100). With regard to basic shift amount candidates for shift amount X, the table differentiates between an offset pattern comprising offset values for cyclic shift amount candidates corresponding to each antenna port and an offset pattern corresponding to basic shift amount candidates of X+N/2.