公开(公告)号：US20250151067A1

公开(公告)日：2025-05-08

申请号：US19019052

申请日：2025-01-13

Applicant: Sun Patent Trust

Inventor： Seigo NAKAO ,  Akihiko NISHIO ,  Ayako HORIUCHI ,  Daichi IMAMURA

IPC: H04W72/21 ,  H04L1/00 ,  H04L1/08 ,  H04L1/1607 ,  H04L1/1829 ,  H04W28/04 ,  H04W52/02 ,  H04W72/04 ,  H04W72/20 ,  H04W76/28

Abstract: Provided are a terminal device and a retransmission control method that make it possible to minimize increases in overhead in an uplink control channel (PUCCH), even if channel selection is used as the method to transmit response signals during carrier-aggregation communication using a plurality of downlink unit bands. On the basis of the generation status of uplink data and error-detection results obtained by a CRC unit, a control unit in the provided terminal uses response signal transmission rules to control the transmission of response signals or uplink control signals that indicate the generation of uplink data. If an uplink control signal and a response signal are generated simultaneously within the same transmission time unit, the control unit changes the resources allocated to the response signal and/or the phase point of the response signal in accordance with the number and position of ACKs within the error-detection result pattern.

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：US20250089034A1

公开(公告)日：2025-03-13

申请号：US18955707

申请日：2024-11-21

Applicant: Sun Patent Trust

Inventor： Takashi Iwai ,  Sadaki FUTAGI ,  Daichi IMAMURA ,  Akihiko NISHIO ,  Seigo NAKAO ,  Yoshihiko OGAWA

IPC: H04W72/0453 ,  H04L5/00 ,  H04W72/20 ,  H04W72/21 ,  H04W72/23 ,  H04W72/54

Abstract: A scheduling apparatus and a scheduling method, wherein the amount of signaling for frequency resource allocation information can be reduced while maintaining system throughput performance. In a base station apparatus, a scheduling section allocates frequency resources to frequency allocation target terminals based on set frequency allocation units, and a frequency allocation parameter setting section adjusts the set frequency allocation units set in the scheduling section based on cluster numbers. Due to this, in each cluster number, frequency resources can be allocated based on the most suitable frequency allocation units with respect to the signaling bit number. As a result, the amount of signaling for frequency resource allocation information can be reduced. Further, system throughput can be maintained by making the cluster number, which is a parameter having little effect on system throughput, a setting parameter for frequency allocation units.

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：US20220302954A1

公开(公告)日：2022-09-22

申请号：US17837953

申请日：2022-06-10

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：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：US20200304254A1

公开(公告)日：2020-09-24

申请号：US16894282

申请日：2020-06-05

Applicant: Sun Patent Trust

Inventor： Seigo NAKAO ,  Akihiko NISHIO ,  Daichi IMAMURA

IPC: H04L5/00 ,  H04W28/06 ,  H04B7/0456 ,  H04B7/06 ,  H04W72/04

Abstract: Disclosed are a wireless base station, wireless terminal, and channel signal formation method that can prevent the quality of downstream assignment control data from degrading, while preventing the number of blind determinations from increasing on the wireless terminal on the receiving side of the downstream control channel signal. In a base station (100), a control unit (101) and a data size regulation unit (103) control the data size of downstream assignment control data and upstream assignment control data contained in the PDCCH signal based on the communication format used between the base station (100) and a terminal (200), the number of antennas (M) (nonnegative number) on the base station (100), the number of antennas (N) (nonnegative number) on the terminal (200), the bandwidth of the downstream band, and the bandwidth of the upstream band. Specifically, the control unit (101) determines it is unnecessary to adjust the aforementioned data size when the selected communication format is first established between multiple antennas and when where there are multiple for one of M and N and only one for the other.

公开(公告)号：US20200178156A1

公开(公告)日：2020-06-04

申请号：US16786685

申请日：2020-02-10

Applicant: Sun Patent Trust

Inventor： Yoshihiko OGAWA ,  Seigo NAKAO ,  Akihiko NISHIO ,  Masayuki HOSHINO ,  Daichi IMAMURA ,  Atsushi SUMASU

IPC: H04W48/02 ,  H04W48/12 ,  H04W28/04 ,  H04L5/00 ,  H04L1/16 ,  H04L1/18 ,  H04L1/00 ,  H04B7/0413

Abstract: A terminal and a communication method thereof whereby, even in a case of employing an asymmetric carrier aggregation system and further employing a MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded.