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公开(公告)号：US20230139852A1
公开(公告)日：2023-05-04
申请号：US17910288
申请日：2021-02-25
Inventor： Hiroyuki KANAYA , Takashi IWAI , Yoshio URABE , Tomofumi TAKATA , Takayuki NAKANO , Jun MINOTANI , Lei HUANG
Abstract: The present invention provides a transmission device and transmission method that are capable of improving reception quality during cooperative communication. A first transmission device according to the present invention comprises: a control circuit which, if the first transmission device and a second transmission device are carrying out transmission in cooperation, generates first control information that includes information common to at least a portion of second control information transmitted by the second transmission device in a second preamble; and a transmission circuit which transmits the first control information in a first preamble.
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公开(公告)号：US20220132500A1
公开(公告)日：2022-04-28
申请号：US17571365
申请日：2022-01-07
Inventor： Takashi IWAI , Daichi IMAMURA , Tomofumi TAKATA , Yoshihiko OGAWA
Abstract: It is an object to provide a sequence allocating method that, while maintaining the number of Zadoff-Chu sequences to compose a sequence group, is configured to make it possible to reduce correlations between different sequential groups. This method comprises the steps of setting a standard sequence with a standard sequence length and a standard sequence number in a step, setting a threshold value in accordance with an RB number in a step, setting a sequence length corresponding to RB number in a step, judging whether ¦r/N−rb/Nb¦=Xth(m) is satisfied in a step, including a plurality of Zadoff-Chu sequences with a sequence number and a sequence length in a sequence group in a step if the judgment is positive, and allocating the sequence group to the same cell in a step.
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公开(公告)号：US20210336738A1
公开(公告)日：2021-10-28
申请号：US17284385
申请日：2019-10-03
Inventor： Takayuki NAKANO , Yoshio URABE , Takashi IWAI , Tomofumi TAKATA
Abstract: An AP (100) with which a Midamble can be set appropriately. For a plurality of user-multiplexed terminals a Midamble configuration determination unit (109) in the AP (100) determines, for each of the plurality of terminals, a configuration of a reference signal inserted into a data field. A wireless transmission/reception unit (104) carries out a communication process on a user-multiplexed signal on the basis of the configuration of the reference signal.
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公开(公告)号：US20210274551A1
公开(公告)日：2021-09-02
申请号：US17255914
申请日：2019-04-05
Inventor： Tomofumi TAKATA , Hidetoshi SUZUKI , Takashi IWAI , Tetsuya YAMAMOTO
Abstract: Provided is a terminal capable of transmitting an uplink signal appropriately in an unlicensed band. In a terminal (100), a resource allocating unit (107) allocates uplink signals to each of a plurality of bands into which a prescribed frequency band has been divided. Each of the plurality of bands is a unit for determining whether a resource is being used by another device. A radio transmitting unit (109) transmits the uplink signals.
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公开(公告)号：US20210227591A1
公开(公告)日：2021-07-22
申请号：US17256109
申请日：2019-10-02
Inventor： Takashi IWAI , Hidetoshi SUZUKI , Tomofumi TAKATA
Abstract: The present invention provides a terminal capable of suitably performing random access processing. In a terminal (100), a RACH resource determination unit (104) determines the format of a random access signal on the basis of a parameter related to the transmission of the random access signal, which includes a preamble part and a data part. A wireless transmission unit (109) transmits the random access signal on the basis of the format.
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Patent Agency Ranking
公开(公告)号：US20190053233A1
公开(公告)日：2019-02-14
申请号：US16163117
申请日：2018-10-17
Inventor： Takashi IWAI , Daichi IMAMURA , Tomofumi TAKATA , Yoshihiko OGAWA
Abstract: It is an object to provide a sequence allocating method that, while maintaining the number of Zadoff-Chu sequences to compose a sequence group, is configured to make it possible to reduce correlations between different sequential groups. This method includes the steps of setting a standard sequence with a standard sequence length (Nb) and a standard sequence number (rb) in a step (ST101), setting a threshold value (Xth(m)) in accordance with an RB number (m) in a step (ST103), setting a sequence length (N) corresponding to RB number (m) in a step (ST104), judging whether ¦r/N−rb/Nb¦=Xth(m) is satisfied in a step (ST106), including a plurality of Zadoff-Chu sequences with a sequence number (r) and a sequence length (N) in a sequence group (rb) in a step (ST107) if the judgment is positive, and allocating the sequence group (rb) to the same cell in a step (ST112).
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37.发明申请INTEGRATED CIRCUIT FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN RADIO COMMUNICATION 有权用于发射和接收无线电通信中的参考信号的集成电路公开(公告)号：US20150237638A1
公开(公告)日：2015-08-20
申请号：US14699890
申请日：2015-04-29
Inventor： Tomofumi TAKATA , Daichi IMAMURA , Seigo NAKAO , Sadaki FUTAGI , Takashi IWAI , Yoshihiko OGAWA
CPC classification number: H04L5/0048 , H04B7/0632 , H04J11/00 , H04J13/0003 , H04J13/0055 , H04J13/0059 , H04J13/0074 , H04J13/10 , H04L5/0007 , H04L5/0057 , H04L25/0204 , H04L25/0208 , H04L25/0228 , H04L27/2695 , H04W72/0413 , H04W72/0446 , H04W72/082 , H04W88/02
Abstract: It is possible to provide a radio communication terminal device and a radio transmission method which can improve reception performance of a CQI and a reference signal. A phase table storage unit stores a phase table which correlates the amount of cyclic shift to complex coefficients {w1, w2} to be multiplied on the reference signal. A complex coefficient multiplication unit reads out a complex coefficient corresponding to the amount of cyclic shift indicated by resource allocation information, from the phase table storage unit and multiplies the read-out complex coefficient on the reference signal so as to change the phase relationship between the reference signals in a slot.
Abstract translation: 可以提供可以提高CQI的接收性能和参考信号的无线通信终端装置和无线发送方法。 相位表存储单元存储将循环移位量与要参考信号相乘的复系数{w1，w2}相关联的相位表。 复系数乘法单元从相位表存储单元读出与由资源分配信息指示的循环移位量相对应的复数系数，并将读出的复数系数与参考信号相乘，以便改变相关关系 参考信号在一个插槽。
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公开(公告)号：US20250158747A1
公开(公告)日：2025-05-15
申请号：US19020612
申请日：2025-01-14
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：US20250126607A1
公开(公告)日：2025-04-17
申请号：US18834560
申请日：2023-01-20
Inventor： Jun MINOTANI , Yoshio URABE , Hiroyuki MOTOZUKA , Takashi IWAI , Tomofumi TAKATA , Ryutaro HASHI
IPC: H04W72/044 , H04L5/00 , H04W84/12
Abstract: This communication device includes: a control circuit that negotiates with another communication device in order to determine a spatial stream used for coordinated transmission; and a communication circuit for performing coordinated transmission with the other communication device. On the basis of information pertaining to the spatial stream obtained in the negotiation, the control circuit orthogonalizes a reference signal included in the coordinated communication signal.
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公开(公告)号：US20250113387A1
公开(公告)日：2025-04-03
申请号：US18978953
申请日：2024-12-12
Inventor： Takashi IWAI , Tomofumi TAKATA , Hidetoshi SUZUKI , Tetsuya YAMAMOTO
IPC: H04W74/0833
Abstract: The present invention provides a terminal that can carry out a random-access process appropriately. A terminal (100) is provided with: a wireless transmission unit (108) that transmits a data signal; and a control unit (101) that determines a second resource for use in transmitting the data signal on the basis of a first resource for use in transmitting a preamble signal.
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