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公开(公告)号：US09391757B2
公开(公告)日：2016-07-12
申请号：US14727481
申请日：2015-06-01
Inventor： Yoshihiko Ogawa , Daichi Imamura , Sadaki Futagi , Tomofumi Takata
CPC classification number: H04J11/005 , H04B1/38 , H04J13/0062 , H04J13/22 , H04L5/0048 , H04L5/0073 , H04L27/2602 , H04L43/16 , H04W16/10 , H04W72/042
Abstract: Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.
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22.发明申请APPARATUS AND METHOD FOR GENERATING AND TRANSMITTING REFERENCE SIGNAL IN RADIO COMMUNICATION 审中-公开用于在无线电通信中产生和发送参考信号的装置和方法公开(公告)号：US20160183246A1
公开(公告)日：2016-06-23
申请号：US15057969
申请日：2016-03-01
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：US09236900B2
公开(公告)日：2016-01-12
申请号：US13685437
申请日：2012-11-26
Inventor： Takashi Iwai , Daichi Imamura , Sadaki Futagi , Yoshihiko Ogawa , Tomofumi Takata , Atsushi Matsumoto
CPC classification number: H04B1/692 , H04J13/0048 , H04J13/0059 , H04J13/0062 , H04J13/0074 , H04J13/14
Abstract: Disclosed are a radio transmission device and a radio transmission method which can reduce a processing amount or a memory amount while maintaining the randomizing effect of other cell interference. When using as a reference signal, a ZC sequence of the sequence length uniquely correlated to a transmission bandwidth of a reference signal, as the transmission bandwidth becomes smaller and the sequence length of the ZC sequence becomes shorter, the sequence is switched at a shorter time interval and as the transmission bandwidth becomes greater and the sequence length of the ZC sequence becomes longer, the switching is performed at a longer time interval. Thus, a reference signal is generated by using the ZC sequence in accordance with the timing into which the reference signal transmission bandwidth and the sequence are switched.
Abstract translation: 公开了一种在保持其他小区干扰的随机化效果的同时可以减少处理量或存储量的无线传输装置和无线传输方法。 当使用参考信号时，随着发送带宽变小并且ZC序列的序列长度变短，与参考信号的传输带宽唯一相关的序列长度的ZC序列变短，所以在更短的时间内切换序列 间隔，并且随着传输带宽变大并且ZC序列的序列长度变长，则以更长的时间间隔进行切换。 因此，根据参考信号传输带宽和序列被切换到的定时，通过使用ZC序列来生成参考信号。
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公开(公告)号：US09219586B2
公开(公告)日：2015-12-22
申请号：US13654280
申请日：2012-10-17
Inventor： Atsushi Matsumoto , Daichi Imamura , Takashi Iwai , Yoshihiko Ogawa , Tomofumi Takata , Katsuhiko Hiramatsu
CPC classification number: H04L5/0057 , H04J11/0023 , H04L5/001 , H04L5/0012 , H04L5/0048 , H04L5/005 , H04L5/0051 , H04L5/0062 , H04L27/2657 , H04L27/2662 , H04W72/042 , H04W72/0453 , H04W72/085 , H04W72/1268 , H04W84/042
Abstract: Provided is a radio communication device which can prevent interference between SRS and PUCCH when the PUCCH transmission bandwidth fluctuates and suppress degradation of CQI estimation accuracy by the band where no SRS is transmitted. The device includes: an SRS code generation unit (201) which generates an SRS (Sounding Reference Signal) for measuring uplink line data channel quality; an SRS arrangement unit (202) which frequency-multiplexes the SRS on the SR transmission band and arranges it; and an SRS arrangement control unit (208) which controls SRS frequency multiplex so as to be uniform in frequency without modifying the bandwidth of one SRS multiplex unit in accordance with the fluctuation of the reference signal transmission bandwidth according to the SRS arrangement information transmitted from the base station and furthermore controls the transmission interval of the frequency-multiplexed SRS.
Abstract translation: 提供一种当PUCCH传输带宽波动时能够防止SRS与PUCCH之间的干扰的无线通信装置，并且通过不发送SRS的频带来抑制CQI估计精度的劣化。 该装置包括：SRS代码生成单元，生成用于测量上行线路数据信道质量的SRS（探测参考信号）; 在SR传输频带上对SRS进行频率复用并布置的SRS布置单元（202）; 以及SRS配置控制单元（208），其根据从所述SRS配置信息发送的SRS配置信息，根据所述参考信号传输带宽的波动来调整SRS频率复用以使其频率均匀，而不修改一个SRS多路复用单元的带宽 并且进一步控制频率复用SRS的发送间隔。
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公开(公告)号：US09049062B2
公开(公告)日：2015-06-02
申请号：US14520170
申请日：2014-10-21
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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Patent Agency Ranking
公开(公告)号：US20140355710A1
公开(公告)日：2014-12-04
申请号：US14372440
申请日：2013-01-11
Inventor： Tomofumi Takata , Akihiko Nishio , Daichi Imamura , Takashi Iwai , Atsushi Matsumoto
IPC: H04B7/04
CPC classification number: H04B7/0417 , H04B7/024 , H04B7/0452 , H04J13/0062 , H04J13/10 , H04J13/16 , H04L5/0035 , H04L5/0051 , H04L27/2613
Abstract: Provided is a transmission device with which, by orthogonalizing different transmission bandwidth DM-RSs, CoMP performance is improved, and it is possible to increase MU-MIMO communication multiplexing. In the device, a sequence generator unit (103) generates a reference signal of a number of transmission bandwidths which is less than a prescribed number using a first sequence which is used in a reference signal of a number of transmission bandwidths which is greater than or equal to the prescribed number when a coordinated receiving by a plurality of receiving devices is applied, and generates the reference signal of the number of transmission bandwidth which is less than the prescribed number using a second sequence which differs from the first sequence when the coordinated receiving is not applied. A transmission unit (112) transmits the reference signal.
Abstract translation: 提供一种发送装置，通过使不同的发送带宽DM-RS正交化，可以提高CoMP性能，并且可以增加MU-MIMO通信复用。 在该装置中，序列发生器单元（103）使用第一序列生成少于规定数量的传输带宽的参考信号，所述第一序列用于多个传输带宽的参考信号，所述参考信号大于或等于 当应用多个接收设备的协调接收时，等于规定数量，并且当协调接收时使用与第一序列不同的第二序列来生成小于规定数量的传输带宽数量的参考信号 不适用。 发送单元（112）发送参考信号。
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公开(公告)号：US12231237B2
公开(公告)日：2025-02-18
申请号：US18429146
申请日：2024-01-31
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：US12225589B2
公开(公告)日：2025-02-11
申请号：US17261835
申请日：2019-10-02
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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公开(公告)号：US11792852B2
公开(公告)日：2023-10-17
申请号：US17255914
申请日：2019-04-05
Inventor： Tomofumi Takata , Hidetoshi Suzuki , Takashi Iwai , Tetsuya Yamamoto
IPC: H04W74/08 , H04L27/26 , H04W72/0453 , H04W72/21
CPC classification number: H04W74/0816 , H04L27/2636 , H04W72/0453 , H04W72/21
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：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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