-
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.
-
公开(公告)号：US11212026B2
公开(公告)日：2021-12-28
申请号：US16620722
申请日：2018-05-17
Inventor： Takashi Iwai , Yoshio Urabe , Takayuki Nakano , Tomohumi Takata
Abstract: A signal generator 10 generates an OOK (on-off keying) modulation signal by mapping a CAZAC (constant amplitude zero auto-correlation) sequence to N subcarriers (N being an integer that is greater than or equal to 2) arranged at a determined interval among M subcarriers (M being an integer that is greater than or equal to 3) that are adjacent in the frequency domain, carrying out inverse fast Fourier transform (IFFT) processing on the mapped CAZAC sequence, and carrying out Manchester coding on a time domain signal generated by the IFFT processing. A radio transmitter 107 transmits the OOK modulation signal.
-
公开(公告)号：US11191030B2
公开(公告)日：2021-11-30
申请号：US16643760
申请日：2018-08-22
Inventor： Takashi Iwai , Tomohumi Takata , Shotaro Maki
Abstract: In a terminal, a transmission power control unit controls the transmission power of an uplink channel (the PUSCH) by using transmission power control information (a TPC command) indicating one from among a plurality of candidate values. A wireless transmission unit transmits the uplink channel with the above transmission power. Instruction information for resetting a control value (closed loop correction value) to be used in a closed loop control of the transmission power is associated with at least one value among the above plurality of candidate values.
-
公开(公告)号：US11050534B2
公开(公告)日：2021-06-29
申请号：US16494792
申请日：2018-03-08
Inventor： Tomohumi Takata , Takashi Iwai , Hidetoshi Suzuki , Ayako Horiuchi
Abstract: A terminal includes: a circuit that, on the basis of a parameter of a first frequency resource assigned a reference signal (SRS) and a parameter of a second frequency resource, adjacent to the first frequency resource, that uses a subcarrier spacing (SCS) which is different from that used by the first frequency resource, punctures the reference signal at a boundary between the first frequency resource and the second frequency resource; and a radio transmitter that transmits the reference signal thus punctured.
-
公开(公告)号：US11044711B2
公开(公告)日：2021-06-22
申请号：US16306378
申请日：2017-05-19
Inventor： Takashi Iwai , Ayako Horiuchi , Tetsuya Yamamoto , Tomohumi Takata
Abstract: In a base station, a transmission unit transmits a downlink control signal and downlink data assigned by the downlink control signal in a time unit including a downlink time resource for the downlink control signal, a downlink time resource for the downlink data, and an uplink time resource for a response signal for the downlink data. A reception unit receives the response signal in the time unit. A transmission bandwidth of the response signal is equal to or lower than a transmission bandwidth of the downlink data corresponding to the response signal.
-
Patent Agency Ranking
公开(公告)号：US11012208B2
公开(公告)日：2021-05-18
申请号：US16306847
申请日：2017-06-07
Inventor： Tomohumi Takata , Takashi Iwai , Hidetoshi Suzuki , Ayako Horiuchi , Joachim Loehr , Tetsuya Yamamoto
Abstract: A base station (100, 300) is provided with a transmitter and a receiver. The transmitter (109) transmits a downlink signal in a downlink transmission region, in a time unit that includes the downlink transmission region, an uplink transmission region, and a gap period that is a switching point between the downlink transmission region and the uplink transmission region. The receiver (111) receives an uplink signal in the uplink transmission region, in the time unit. Furthermore, a delay tolerant signal for which a delay is tolerated more than for the downlink signal and the uplink signal is mapped to within the gap period.
-
公开(公告)号：US10826653B2
公开(公告)日：2020-11-03
申请号：US16320922
申请日：2016-08-11
Inventor： Takashi Iwai , Hidetoshi Suzuki , Ayako Horiuchi , Lilei Wang , Joachim Loehr
Abstract: A self-contained operation using a time-unit configuration taking into consideration HARQ processes is performed. In base station, transmission section transmits a downlink signal in a downlink transmission region in a time unit composed of the downlink transmission region, an uplink transmission region, and a gap interval that is a switching point from the downlink transmission region to the uplink transmission region; and reception section receives an uplink signal in the uplink transmission region in the time unit. Each time unit includes the downlink transmission region and the uplink transmission region for each of HARQ processes.
-
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.
-
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.
-
20.发明授权Transmission device, reception device, and method for controlling transmission power 有权发送装置，接收装置以及发送功率控制方法公开(公告)号：US09439155B2
公开(公告)日：2016-09-06
申请号：US14377147
申请日：2013-02-22
Inventor： Takashi Iwai , Kazuki Takeda , Akihiko Nishio , Daichi Imamura , Masayuki Hoshino
CPC classification number: H04W52/242 , H04L5/0091 , H04W52/146 , H04W52/362 , H04W52/40 , H04W52/58 , H04W72/0406
Abstract: This transmission device can notify of a control value pertaining to transmission power without causing an increase in the amount of signaling. A control unit (103) controls transmission power based on a bit sequence notified from a reception device and the association between the bit sequence and a control value pertaining to transmission power; in the association, each bit sequence is respectively associated with a first control value candidate group and a second control value candidate group; when the device is not the subject of cooperative reception, the control unit (103) calculates a transmission power using a control value candidate associated with the notified bit sequence among the first control value candidate group, and when the device is the subject of cooperative reception, the control unit (103) calculates a transmission power using a control value candidate associated with the notified bit sequence among the second control value candidate group.
Abstract translation: 该发送装置能够通知与发送功率有关的控制值而不引起信令量的增加。 控制单元（103）基于从接收装置通知的比特序列和比特序列与发送功率的控制值之间的关联来控制发送功率; 在关联中，每个比特序列分别与第一控制值候选组和第二控制值候选组相关联; 当设备不是协同接收的对象时，控制单元（103）使用与第一控制值候选组之间的通知的位序列相关联的控制值候选来计算发送功率，并且当该设备是协作接收的对象时 ，控制单元（103）使用与第二控制值候选组中的所通知的位序列相关联的控制值候选来计算发送功率。
-
-
-
-
-
-
-
-
-
Search Results
135
records
(took 0.03 seconds)
