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公开(公告)号：US20160183306A1
公开(公告)日：2016-06-23
申请号：US15056926
申请日：2016-02-29
Inventor： Daichi Imamura , Sadaki Futagi , Masaru Fukuoka , Takashi Iwai , Atsushi Matsumoto
CPC classification number: H04W74/0833 , H04W72/042 , H04W74/00 , H04W74/006 , H04W74/008 , H04W74/0866
Abstract: Disclosed are a radio transmission device and a radio transmission method which reduce the RACH conflict ratio and improve the RACH detection characteristic. When the device and the method are used: as the number of signature numbers allocated for UE by the network side increases, the condition for allocating a signature by UE itself is mitigated and an expectation value which is a statistic average value of the RA quantity using the signature allocated by UE for itself is decreased; and as the number of signature numbers allocated for UE by the network side decreases, the condition for allocating a signature by UE itself is limited and an expectation value of the RA quantity using the signature allocated by UE for itself is increased.
Abstract translation: 公开了减少RACH冲突比并提高RACH检测特性的无线传输装置和无线传输方法。 当使用设备和方法时：随着网络侧为UE分配的签名号码的数量增加，UE本身分配签名的条件得到缓解，作为RA数量的统计平均值的期望值使用 UE自身分配的签名减少; 并且由于由网络侧为UE分配的签名号码的数量减少，所以UE本身分配签名的条件受到限制，并且使用UE自己分配的签名的RA数量的期望值增加。
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公开(公告)号：US20160099746A1
公开(公告)日：2016-04-07
申请号：US14970255
申请日：2015-12-15
Inventor： Daichi Imamura , Takashi Iwai , Kazunori Inogai , Sadaki Futagi , Atsushi Matsumoto
IPC: H04B1/7083 , H04W72/04
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：US11956833B2
公开(公告)日：2024-04-09
申请号：US18145768
申请日：2022-12-22
Inventor： Takashi Iwai , Tomohumi Takata , Atsushi Matsumoto
IPC: H04W74/08 , H04L5/00 , H04W72/1268 , H04W74/0833
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 (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：US09313808B2
公开(公告)日：2016-04-12
申请号：US14303351
申请日：2014-06-12
Inventor： Daichi Imamura , Sadaki Futagi , Masaru Fukuoka , Takashi Iwai , Atsushi Matsumoto
CPC classification number: H04W74/0833 , H04W72/042 , H04W74/00 , H04W74/006 , H04W74/008 , H04W74/0866
Abstract: Disclosed are a radio transmission device and a radio transmission method which reduce the RACH conflict ratio and improve the RACH detection characteristic. When the device and the method are used: as the number of signature numbers allocated for UE by the network side increases, the condition for allocating a signature by UE itself is mitigated and an expectation value which is a statistic average value of the RA quantity using the signature allocated by UE for itself is decreased; and as the number of signature numbers allocated for UE by the network side decreases, the condition for allocating a signature by UE itself is limited and an expectation value of the RA quantity using the signature allocated by UE for itself is increased.
Abstract translation: 公开了减少RACH冲突比并提高RACH检测特性的无线传输装置和无线传输方法。 当使用设备和方法时：随着网络侧为UE分配的签名号码的数量增加，UE本身分配签名的条件得到缓解，作为RA数量的统计平均值的期望值使用 UE自身分配的签名减少; 并且由于由网络侧为UE分配的签名号码的数量减少，所以UE本身分配签名的条件受到限制，并且使用UE自己分配的签名的RA数量的期望值增加。
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公开(公告)号：US09042478B2
公开(公告)日：2015-05-26
申请号：US14314447
申请日：2014-06-25
Inventor： Kenichi Miyoshi , Atsushi Matsumoto
CPC classification number: H04L27/2626 , H04L1/0071 , H04L1/08 , H04L27/2602 , H04L27/2647 , H04L27/28 , H04L27/32 , H04L27/34 , H04L27/3488 , H04L27/362
Abstract: A duplicating section duplicates a bit sequence to be input, and a 16QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol sequence input in series, an S/P section parallel converts the symbol sequence input in series, and an IFFT section provides IFFT processing to the input symbol sequence. Since each of multiple same bits duplicated by the duplicating section is included in a different symbol, each of the multiple same bits is allocated to each of multiple subcarriers each having a different frequency by IFFT processing. As a result, a multicarrier signal including the multiple same bits each having a different frequency is generated.
Abstract translation: 复制部分复制要输入的比特序列，并且16QAM部分调制复制源的比特序列以形成符号，16QAM部分调制复制比特序列以形成符号，S / P部分并行转换符号 序列输入串联，S / P部分并行转换串联输入的符号序列，IFFT部分向输入符号序列提供IFFT处理。 由于由复制部分复制的多个相同位中的每一个被包括在不同的符号中，所以通过IFFT处理分配具有不同频率的多个子载波中的每一个的多个相同比特中的每一个。 结果，产生了包括具有不同频率的多个相同位的多载波信号。
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Patent Agency Ranking
公开(公告)号：US11985513B2
公开(公告)日：2024-05-14
申请号：US18167771
申请日：2023-02-10
Inventor： Jun Minotani , Atsushi Matsumoto , Takashi Iwai , Tomofumi Takata , Yoshio Urabe
Abstract: Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.
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公开(公告)号：US11611885B2
公开(公告)日：2023-03-21
申请号：US16969699
申请日：2019-01-10
Inventor： Jun Minotani , Atsushi Matsumoto , Takashi Iwai , Tomofumi Takata , Yoshio Urabe
Abstract: Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.
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公开(公告)号：US09775176B2
公开(公告)日：2017-09-26
申请号：US15056926
申请日：2016-02-29
Inventor： Daichi Imamura , Sadaki Futagi , Masaru Fukuoka , Takashi Iwai , Atsushi Matsumoto
CPC classification number: H04W74/0833 , H04W72/042 , H04W74/00 , H04W74/006 , H04W74/008 , H04W74/0866
Abstract: Disclosed are a radio transmission device and a radio transmission method which reduce the RACH conflict ratio and improve the RACH detection characteristic. When the device and the method are used: as the number of signature numbers allocated for UE by the network side increases, the condition for allocating a signature by UE itself is mitigated and an expectation value which is a statistic average value of the RA quantity using the signature allocated by UE for itself is decreased; and as the number of signature numbers allocated for UE by the network side decreases, the condition for allocating a signature by UE itself is limited and an expectation value of the RA quantity using the signature allocated by UE for itself is increased.
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公开(公告)号：US20160365962A1
公开(公告)日：2016-12-15
申请号：US15244692
申请日：2016-08-23
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：US09374129B2
公开(公告)日：2016-06-21
申请号：US14970255
申请日：2015-12-15
Inventor： Daichi Imamura , Takashi Iwai , Kazunori Inogai , Sadaki Futagi , Atsushi Matsumoto
IPC: H04W4/00 , H04B1/7083 , H04W72/04
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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