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81.发明授权公开(公告)号：US11695607B2
公开(公告)日：2023-07-04
申请号：US17578281
申请日：2022-01-18
Inventor： Takashi Iwai , Tomohumi Takata , Hidetoshi Suzuki , Tetsuya Yamamoto , Quan Kuang
CPC classification number: H04L27/2613 , H04J13/0062 , H04L5/0051 , H04L27/26025
Abstract: When a plurality of the subcarrier spacing values are applied, a reference signal is generated by using a sequence having a sequence length corresponding to a first ratio of a first subcarrier spacing set for transmission data to the maximum settable subcarrier spacing. The sequence of the reference signal is mapped to a frequency resource at mapping intervals in accordance with a second ratio which is the reciprocal of the first ratio, and the transmission data and the reference signal are transmitted.
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公开(公告)号：US11616619B2
公开(公告)日：2023-03-28
申请号：US17255917
申请日：2019-08-26
Inventor： Shotaro Maki , Takashi Iwai , Ayako Horiuchi , Ankit Bhamri , Yoshihiko Ogawa
Abstract: Provided is a base station with which it is possible to appropriately arrange a reference signal. In a base station (100), a control unit (101) determines a second threshold value on the basis of a first threshold value used in determining the arrangement of a reference signal. A transmission unit (105) transmits the reference signal arranged on the basis of the second threshold value.
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公开(公告)号：US11515966B2
公开(公告)日：2022-11-29
申请号：US16964485
申请日：2018-12-26
Inventor： Takashi Iwai , Tetsuya Yamamoto , Tomoya Nunome , Tomofumi Takata
Abstract: According to the present invention, a base station can dynamically change a repetition transmission method as appropriate. In a base station (100), a repetition control unit (103) determines a data repetition pattern for a terminal (200). A transmission unit (109) repeatedly transmits data (repetition transmission) on the basis of the repetition pattern. The data repetition pattern corresponds to control information to be reported to the terminal (200) by dynamic signaling.
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公开(公告)号：US11277757B2
公开(公告)日：2022-03-15
申请号：US16643766
申请日：2018-08-22
Inventor： Tomohumi Takata , Takashi Iwai , Shotaro Maki , Yihui Li
Abstract: In a terminal, a transmission power calculation unit calculates a transmission power of an uplink signal by using transmission power control information indicating one value from among a plurality of candidate values respectively associated with correction values that correct a control value to use in a closed loop control of the transmission power. A wireless transmission unit transmits the uplink signal with the above transmission power. A first correction value and a second correction value having a larger step size than the first correction value are associated with each of the plurality of candidate values.
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85.发明授权公开(公告)号：US11258644B2
公开(公告)日：2022-02-22
申请号：US16322853
申请日：2017-06-20
Inventor： Takashi Iwai , Tomohumi Takata , Hidetoshi Suzuki , Tetsuya Yamamoto , Quan Kuang
Abstract: When a plurality of the subcarrier spacing values are applied, a reference signal is generated by using a sequence having a sequence length corresponding to a first ratio of a first subcarrier spacing set for transmission data to the maximum settable subcarrier spacing. The sequence of the reference signal is mapped to a frequency resource at mapping intervals in accordance with a second ratio which is the reciprocal of the first ratio, and the transmission data and the reference signal are transmitted.
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Patent Agency Ranking
公开(公告)号：US11071140B2
公开(公告)日：2021-07-20
申请号：US16473368
申请日：2018-02-06
Inventor： Takashi Iwai , Yoshio Urabe , Tomohumi Takata
Abstract: In an AP (100), a Trigger frame generator (104) generates a trigger signal instructing an uplink signal transmission, the trigger signal including a terminal information field that includes a terminal ID subfield and a resource unit allocation information subfield, and a radio transmitter/receiver (106) transmits the trigger signal. In a case where the trigger signal includes a first terminal information field specifying one or more contiguous resource units for random access, the Trigger frame generator (104) sets an unused ID that is not to be used as a terminal ID in the first terminal information field.
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公开(公告)号：US11005543B2
公开(公告)日：2021-05-11
申请号：US14383021
申请日：2013-03-08
Inventor： Tadashi Yoshida , Ayako Horiuchi , Takashi Iwai , Yoshihiko Ogawa , Akihiko Nishio
Abstract: This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).
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公开(公告)号：US10999830B2
公开(公告)日：2021-05-04
申请号：US16097794
申请日：2017-04-20
Inventor： Tetsuya Yamamoto , Ayako Horiuchi , Takashi Iwai
Abstract: In a base station, a controller, when communicating with a terminal using a time unit including a downlink time resource for a downlink control signal, a downlink time resource assigned for downlink data by the downlink control signal, and a uplink time resource for a response signal for the downlink data, sets the amount of the uplink time resource used by the terminal for transmission of the response signal to be larger as the time unit is longer.
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公开(公告)号：US20160270122A1
公开(公告)日：2016-09-15
申请号：US15161973
申请日：2016-05-23
Inventor： Daichi Imamura , Takashi Iwai , Kazunori Inogai , Sadaki Futagi , Atsushi Matsumoto
CPC classification number: H04W74/0833 , H04B1/707 , H04B1/7083 , H04B2201/70702 , H04B2201/70713 , H04J13/0062 , H04J13/102 , H04J13/22 , H04L5/0048 , H04L23/02 , H04L27/2613 , H04W72/04 , H04W72/0446 , H04W72/0453 , H04W74/0875
Abstract: A sequence allocating method and apparatus wherein in a system where a plurality of different Zadoff-Chu sequences or GCL sequences are allocated to a single cell, the arithmetic amount and circuit scale of a correlating circuit at a receiving end can be reduced. In ST201, a counter (a) and a number (p) of current sequence allocations are initialized, and in ST202, it is determined whether the number (p) of current sequence allocations is coincident with a number (K) of allocations to one cell. In ST203, it is determined whether the number (K) of allocations to the one cell is odd or even. If K is even, in ST204-ST206, sequence numbers (r=a and r=N−a), which are not currently allocated, are combined and then allocated. If K is odd, in ST207-ST212, for sequences that cannot be paired, one of sequence numbers (r=a and r=N−a), which are not currently allocated, is allocated.
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公开(公告)号：US09370007B2
公开(公告)日：2016-06-14
申请号：US14457783
申请日：2014-08-12
Inventor： Yoshihiko Ogawa , Seigo Nakao , Daichi Imamura , Akihiko Nishio , Masayuki Hoshino , Katsuhiko Hiramatsu , Kenichi Miyoshi , Yasuaki Yuda , Sadaki Futagi , Takashi Iwai
CPC classification number: H04W72/0453 , H04L1/0042 , H04L1/0061 , H04L5/0023 , H04L5/0039 , H04L5/0048 , H04L25/0226 , H04L25/03159 , H04L27/2602
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.
Abstract translation: 公开了一种无线通信基站装置和分割数确定方法，无论来自无线通信终端装置的发送信号的频域中的分割数如何，都可以在维持信道估计精度的同时提高频率分集效应。 确定单元确定来自无线通信终端设备的发送信号的频域中的分割数。 这里，确定单元随着发送信号中包括的导频块的数量的增加，增加来自无线通信终端装置的发送信号的频域的分割数。 此外，调度单元根据由确定单元确定的分割数来调度分配的发送信号的频率资源。
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