公开(公告)号：US20230189043A1

公开(公告)日：2023-06-15

申请号：US18151966

申请日：2023-01-09

Applicant: SUN PATENT TRUST

Inventor： Yasuaki YUDA ,  Seigo NAKAO ,  Ayako HORIUCHI ,  Daichi IMAMURA ,  Masayuki HOSHINO ,  Atsushi SUMASU

IPC: H04W24/10 ,  H04L1/00 ,  H04L1/20 ,  H04L5/00 ,  H04L12/18

CPC classification number: H04W24/10 ,  H04L1/20 ,  H04L1/0026 ,  H04L5/0057 ,  H04L12/189 ,  H04L27/28

Abstract: To measure the channel quality of the own cell accurately in a condition where there is no interference from a neighbor cell. A wireless communication terminal according to the invention is a wireless communication terminal to be connected to a base station for transmitting and receiving data to/from the base station, the wireless communication terminal including: a receiver that receives a signal which includes control information provided for measuring a channel quality of own cell from the base station; an extractor that extracts the control information from the signal received by the receiver; a measurement section that measures, on the basis of the control information, the channel quality of the own cell in a domain where a neighbor cell does not transmit a signal; and a transmitter that transmits a measurement result of the channel quality of the own cell measured by the measurement section, to the base station.

公开(公告)号：US20230096976A1

公开(公告)日：2023-03-30

申请号：US18063002

申请日：2022-12-07

Applicant: Sun Patent Trust

Inventor： Hui TONG ,  Masayuki HOSHINO ,  Ming XU ,  Daichi IMAMURA

IPC: H04L5/00 ,  H04L27/26

Abstract: A Method of scrambling reference signals, device and user equipment using the method are provided. In the method, a plurality of layers of reference signals assigned on predetermined radio resource of a plurality of layers of resource blocks with the same time and frequency resources are scrambled, the method comprising: an orthogonalizing step of multiplying each layer of reference signal selectively by one of a plurality of orthogonal cover codes (OCCs) with the same length wherein the OCC multiplied to a first layer of reference signal can be configured as different from those multiplied to other layers of reference signals; and a scrambling step of multiplying all of symbols obtained from the OCC multiplied to each of the other layers of reference signals by a symbol-common scrambling sequence wherein the symbol-common scrambling sequences can be different from each other for reference signals multiplied by the same OCC.

公开(公告)号：US20220240230A1

公开(公告)日：2022-07-28

申请号：US17658687

申请日：2022-04-11

Applicant: Sun Patent Trust

Inventor： Yoshiko SAITO ,  Ayako HORIUCHI ,  Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Alexander GOLITSCHEK EDLER VON ELBWART ,  Sujuan FENG

IPC: H04W72/04 ,  H04L5/00 ,  H04J11/00

Abstract: A communication apparatus has a receiver and a decoder. The receiver receives a control signal including first downlink control information and second downlink control information, and receives decoding area information that indicates whether the extended Physical Downlink Control Channel (PDCCH) should be decoded for each of a plurality of terminal apparatuses. The decoder decodes each of a plurality of first mapping candidates in the PDCCH area or decodes each of the plurality of first mapping candidates in the PDCCH area and each of the plurality of second mapping candidates in the extended PDCCH. A number of the second mapping candidates included in the user-specific search space equals to or is more than a number of the first mapping candidates included in the common search space.

公开(公告)号：US20210204159A1

公开(公告)日：2021-07-01

申请号：US17203447

申请日：2021-03-16

Applicant: Sun Patent Trust

Inventor： Yasuaki YUDA ,  Seigo NAKAO ,  Ayako HORIUCHI ,  Daichi IMAMURA ,  Masayuki HOSHINO ,  Atsushi SUMASU

IPC: H04W24/10 ,  H04L1/00 ,  H04L1/20 ,  H04L5/00 ,  H04L12/18

Abstract: To measure the channel quality of the own cell accurately in a condition where there is no interference from a neighbor cell. A wireless communication terminal according to the invention is a wireless communication terminal to be connected to a base station for transmitting and receiving data to/from the base station, the wireless communication terminal including: a receiver that receives a signal which includes control information provided for measuring a channel quality of own cell from the base station; an extractor that extracts the control information from the signal received by the receiver; a measurement section that measures, on the basis of the control information, the channel quality of the own cell in a domain where a neighbor cell does not transmit a signal; and a transmitter that transmits a measurement result of the channel quality of the own cell measured by the measurement section, to the base station.

公开(公告)号：US20210184725A1

公开(公告)日：2021-06-17

申请号：US17180444

申请日：2021-02-19

Applicant: Sun Patent Trust

Inventor： Seigo NAKAO ,  Hidetoshi SUZUKI ,  Daichi IMAMURA

IPC: H04B1/7143 ,  H04B7/024 ,  H04J11/00 ,  H04J13/22

Abstract: A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit (214) primarily spreads a response signal by use of a ZAC sequence established by a control unit (209). A spreading unit (217) secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit (209). The control unit (209) controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit (214) and the block-wise spread code sequence to be used for the secondary spread in the spreading unit (217). The hopping pattern established in the control unit (209) is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.

公开(公告)号：US20210105109A1

公开(公告)日：2021-04-08

申请号：US17124949

申请日：2020-12-17

Applicant: Sun Patent Trust

Inventor： Masayuki HOSHINO ,  Seigo NAKAO ,  Daichi IMAMURA

IPC: H04L5/00 ,  H04L1/00 ,  H04L1/04 ,  H04J11/00

Abstract: A data alignment method capable of preventing degradation in demodulation performance due to variation in signal qualities when a data signal to which a Turbo code is applied is transmitted simultaneously from a plurality of cells. The method divides signal components to be used for data alignment into resources common to all the cells and resources dependent on the cells and transmits encoded and rate-matched data with the first half thereof aligned to the resources common to all the cells and the second half thereof aligned to the resources dependent on the cells.

公开(公告)号：US20190014567A1

公开(公告)日：2019-01-10

申请号：US16132512

申请日：2018-09-17

Applicant: Sun Patent Trust

Inventor： Yoshiko SAITO ,  Ayako HORIUCHI ,  Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Alexander GOLITSCHEK EDLER VON ELBWART ,  Sujuan FENG

IPC: H04W72/04 ,  H04J11/00 ,  H04L5/00

Abstract: A communication apparatus has a receiver and a decoder. The receiver receives a control signal including first downlink control information and second downlink control information, and receives decoding area information that indicates whether the extended Physical Downlink Control Channel (PDCCH) should be decoded for each of a plurality of terminal apparatuses. The decoder decodes each of a plurality of first mapping candidates in the PDCCH area or decodes each of the plurality of first mapping candidates in the PDCCH area and each of the plurality of second mapping candidates in the extended PDCCH. A number of the second mapping candidates included in the user-specific search space equals to or is more than a number of the first mapping candidates included in the common search space.

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：US20180152928A1

公开(公告)日：2018-05-31

申请号：US15871194

申请日：2018-01-15

Applicant: Sun Patent Trust

Inventor： Yoshiko SAITO ,  Ayako HORIUCHI ,  Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA ,  Alexander GOLITSCHEK EDLER VON ELBWART ,  Sujuan FENG

IPC: H04W72/04 ,  H04J11/00 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04J11/0079 ,  H04L5/001 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0094

Abstract: A communication apparatus has a receiver and a decoder. The receiver receives a control signal including first downlink control information and second downlink control information, and receives decoding area information that indicates whether the extended Physical Downlink Control Channel (PDCCH) should be decoded for each of a plurality of terminal apparatuses. The decoder decodes each of a plurality of first mapping candidates in the PDCCH area or decodes each of the plurality of first mapping candidates in the PDCCH area and each of the plurality of second mapping candidates in the extended PDCCH. A number of the second mapping candidates included in the user-specific search space equals to or is more than a number of the first mapping candidates included in the common search space.

公开(公告)号：US20180041245A1

公开(公告)日：2018-02-08

申请号：US15787205

申请日：2017-10-18

Applicant: SUN PATENT TRUST

Inventor： Seigo NAKAO ,  Hidetoshi SUZUKI ,  Daichi IMAMURA

IPC: H04B1/7143 ,  H04J11/00 ,  H04J13/22 ,  H04B7/024

CPC classification number: H04B1/7143 ,  H04B7/024 ,  H04J11/0053 ,  H04J13/22

Abstract: A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit primarily spreads a response signal by use of a ZAC sequence established by a control unit. A spreading unit secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit. The control unit controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit and the block-wise spread code sequence to be used for the secondary spread in the spreading unit. The hopping pattern established in the control unit is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.