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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：US20160050051A1
公开(公告)日：2016-02-18
申请号：US14927159
申请日：2015-10-29
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.
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公开(公告)号：US09265046B2
公开(公告)日：2016-02-16
申请号：US13887671
申请日：2013-05-06
Inventor： Yoshihiko Ogawa , Daichi Imamura , Takashi Iwai , Katsuhiko Hiramatsu , Tomofumi Takata , Atsushi Matsumoto
CPC classification number: H04W72/0453 , H04J1/02 , H04J13/0055 , H04J13/22
Abstract: A radio transmission device and a radio communication method employ sequence length decision units which hold a correspondence in which one basic sequence length is set for a plurality of transmission bandwidths. The sequence length decision units acquire transmission bandwidth information and decide a sequence length corresponding to the acquired transmission bandwidth information. A decision is made as to which of the cyclic extension process or the truncation process is to be executed on a Zadoff-Chu sequence according to the sizes of the acquired transmission bandwidth information and the basic sequence length. Then, a difference between the transmission bandwidth and the basic sequence length, i.e., the number of possible cyclic extension/truncation symbols, is obtained.
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公开(公告)号：US20150249963A1
公开(公告)日：2015-09-03
申请号：US14713993
申请日：2015-05-15
Inventor： Takashi Iwai , Akihiko Nishio , Daichi Imamura , Yoshihiko Ogawa , Atsushi Matsumoto
CPC classification number: H04W52/365 , H04L5/0007 , H04L5/0053 , H04W72/0473
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.
Abstract translation: 提供了一种无线通信装置，其包括接收机和控制器。 接收机在运行中接收第一功率余量（PHR），其通过从移动台的最大发射功率中减去数据信道的发射功率而获得，并从移动台发送，并接收第二PHR 通过从移动台的最大发送功率减去数据信道的发送功率和控制信道的发送功率而获得的，并且从移动台发送。 控制器在操作中选择性地设置由移动台执行的不同频带中的数据信道和控制信道的同时传输。 当数据信道和控制信道从移动台同时发送到不同的频带时，获得第二PHR并从移动台发送。
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公开(公告)号：US09094065B2
公开(公告)日：2015-07-28
申请号：US14372440
申请日：2013-01-11
Inventor： Tomofumi Takata , Akihiko Nishio , Daichi Imamura , Takashi Iwai , Atsushi Matsumoto
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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Patent Agency Ranking
16.发明申请INTEGRATED CIRCUIT FOR CONTROLLING SELECTION OF RANDOM ACCESS PREAMBLE SEQUENCE 有权用于控制选择随机访问前缀序列的集成电路公开(公告)号：US20150200705A1
公开(公告)日：2015-07-16
申请号：US14637207
申请日：2015-03-03
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.
Abstract translation: 一种序列分配方法和装置，其中在将多个不同的Zadoff-Chu序列或GCL序列分配给单个小区的系统中，可以减少接收端的相关电路的算术量和电路规模。 在ST201中，初始化当前序列分配的计数器（a）和数量（p），并且在ST202中，确定当前序列分配的数量（p）是否与一个分配的数量（K）一致 细胞。 在ST203中，确定对一个单元的分配的数量（K）是奇数还是偶数。 如果K是偶数，则在ST204-ST206中，组合然后分配未被分配的序列号（r = a和r = N-a）。 如果K是奇数，则在ST207-ST212中，对于不能配对的序列，分配未分配的序列号（r = a和r = N-a）中的一个。
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公开(公告)号：US12052769B2
公开(公告)日：2024-07-30
申请号：US18352624
申请日：2023-07-14
Inventor： Takashi Iwai , Tomohumi Takata , Atsushi Matsumoto
IPC: H04W74/0833 , H04L5/00 , H04W72/1268
CPC classification number: H04W74/0833 , H04L5/0039 , H04W72/1268
Abstract: A communication apparatus in the present disclosure comprises an AID generator, a Trigger frame generator, and a wireless transmitter/receiver. When a Trigger Type in a trigger frame is an RA trigger, the AID generator generates, as information for an AID12 subfield, information that is different from an AID. The Trigger frame generator generates a RA variant Trigger frame when the Trigger Type in the trigger frame is an RA trigger, and sets, in the AID12 subfield included in the RA variant Trigger frame, the information output from the AID generator. The wireless transmitter/receiver transmits the Trigger frame, generated by the Trigger frame generator, to a terminal.
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公开(公告)号：US11570816B2
公开(公告)日：2023-01-31
申请号：US16464658
申请日：2017-12-07
Inventor： Takashi Iwai , Tomohumi Takata , Atsushi Matsumoto
Abstract: A communication apparatus in the present disclosure comprises an AID generator, a Trigger frame generator, and a wireless transmitter/receiver. When a Trigger Type in a trigger frame is an RA trigger, the AID generator (103) generates, as information for an AID12 subfield, information that is different from an AID. The Trigger frame generator (104) generates a RA variant Trigger frame when the Trigger Type in the trigger frame is an RA trigger, and sets, in the AID12 subfield included in the RA variant Trigger frame, the information output from the AID generator (103). The wireless transmitter/receiver (106) transmits the Trigger frame, generated by the Trigger frame generator (104), to a terminal (200).
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公开(公告)号：US20160330727A1
公开(公告)日：2016-11-10
申请号：US15216641
申请日：2016-07-21
Inventor： Daichi Imamura , Hidetoshi Suzuki , Akihiko Nishio , Atsushi Matsumoto
Abstract: Provided are a radio transmission device and a radio transmission method capable of improving downlink and uplink throughput even when performing dynamic symbol allocation. In the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method, and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, Index corresponding to the basic TF is reported from BS to MS.
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公开(公告)号：US09432972B2
公开(公告)日：2016-08-30
申请号：US13918654
申请日：2013-06-14
Inventor： Daichi Imamura , Hidetoshi Suzuki , Akihiko Nishio , Atsushi Matsumoto
CPC classification number: H04W72/0406 , H04L1/0003 , H04L1/0007 , H04L1/0009 , H04L1/0025 , H04L1/0029 , H04L1/1671
Abstract: Provided are a radio transmission device and a radio transmission method capable of improving downlink and uplink throughput even when performing dynamic symbol allocation. In the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method, and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, Index corresponding to the basic TF is reported from BS to MS.
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