-
公开(公告)号：US09313007B2
公开(公告)日：2016-04-12
申请号：US14372643
申请日：2013-01-23
发明人： Riichi Kudo , Yusuke Asai , Tomoki Murakami , Koichi Ishihara , Masato Mizoguchi
IPC分类号： H04J11/00 , H04W4/00 , H04B7/216 , H04L5/00 , H04B7/04 , H04B7/06 , H04W72/04 , H04L25/02 , H04W88/08
CPC分类号： H04L5/0053 , H04B7/0456 , H04B7/0617 , H04B7/068 , H04B7/0684 , H04J11/003 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L25/0232 , H04W72/0453 , H04W88/08
摘要： The number of OFDM symbols for channel estimation is reduced, overhead due to a pilot signal and a feedback signal is reduced, and the throughput is improved. A wireless apparatus is provided with: an iterative coefficient setting unit which sets, for a plurality of transmission ports, an iterative coefficient representing the number of transmission ports which share a plurality of frequency channels of training signals for estimating the channel information; a training signal generating unit which allocates frequency channels to each transmission port so as to satisfy the set iterative coefficient and generates L training signals based on the allocated frequency channels; a channel information acquiring unit which acquires channel information estimated from the training signals from a communication partner for the frequency channels allocated to each transmission port; and a channel information interpolating unit which interpolates channel information of a remaining frequency channel other than the frequency channels allocated to each transmission port from the acquired channel information.
摘要翻译： 用于信道估计的OFDM符号的数量减少，由于导频信号和反馈信号的开销降低，并且提高了吞吐量。 无线装置具有：迭代系数设定单元，对于多个发送端口设定表示共享用于估计所述信道信息的训练信号的多个频率信道的发送端口的数量的迭代系数; 训练信号生成单元，其向每个发送端口分配频率信道，以满足所设置的迭代系数，并且基于所分配的频率信道生成L个训练信号; 频道信息获取单元，用于从分配给每个传输端口的频道的通信伙伴获取从训练信号估计的频道信息; 以及信道信息内插单元，其从所获取的频道信息中插入除了分配给每个传输端口的频道之外的剩余频道的频道信息。
-
公开(公告)号：US12063067B2
公开(公告)日：2024-08-13
申请号：US17915850
申请日：2020-04-02
发明人： Ryota Shiina , Tomohiro Taniguchi , Kazutaka Hara , Shinya Tamaki , Tomoki Murakami , Toshiro Nakahira
IPC分类号： H04B10/11 , H04B10/112 , H04B10/114 , H04B10/2575 , H04B10/50 , H04W4/38 , H04W4/90
CPC分类号： H04B10/112 , H04B10/114 , H04B10/25752 , H04B10/50 , H04W4/38 , H04W4/90
摘要： An object of the present disclosure is to inform a user of a safe evacuation guidance route in real time using smart lightings without deploying dedicated evacuation guidance facilities.
The present disclosure is a wireless communication system including: one or more wireless base stations that wirelessly communicate with a terminal; a plurality of optical base stations that transmit an optical signal to the terminal; and a base station control device that controls the optical signal transmitted by the optical base stations, wherein the base station control device collects environment information around the optical base stations, detects a disaster around the optical base stations using the collected environment information, and when detecting a disaster, causes the optical base station installed at a position close to a disaster occurrence location and the optical base station installed at a position far from the disaster occurrence location to output light of different colors.-
公开(公告)号：US12015977B2
公开(公告)日：2024-06-18
申请号：US17625435
申请日：2019-07-10
摘要： A control station device includes a policy generation unit that calculates a priority order of a plurality of wireless communication systems having different types of systems on a basis of information acquired from a wireless terminal device that selects one wireless communication system from among the plurality of wireless communication systems to perform wireless communication, and generates a selection policy indicating the priority order of the plurality of wireless communication systems, and a policy delivery unit that delivers the selection policy indicating the priority order of the plurality of wireless communication systems to the wireless terminal device. With this configuration, an optimal wireless communication system that maximizes the performance of each wireless terminal device can be selected while reducing the load and calculation time imposed on the control station device.
-
公开(公告)号：US11903025B2
公开(公告)日：2024-02-13
申请号：US17439892
申请日：2020-03-11
发明人： Toshiro Nakahira , Tomoki Murakami , Hirantha Abeysekera , Koichi Ishihara , Takafumi Hayashi , Yasushi Takatori
CPC分类号： H04W74/0816 , H04L5/0053
摘要： A wireless communications method for connecting a base station with each of a plurality of terminal stations, the base station being equipped with a plurality of wireless communications units each configured to be able to selectively enable or disable an RTS/CTS function and a NoACK function and connectable with one or more of the terminal stations, includes: a collection step of collecting information as to whether each of the terminal stations is a hidden terminal and information about transmission characteristics of each of the terminal stations; a policy calculation step of calculating a setting policy for enabling or disabling the RTS/CTS function and the NoACK function for each of the wireless communications units and a switching policy for setting a condition for switching that one of the wireless communications units which is to be connected, for each of the terminal stations, based on the collected information; and a setting step of setting those of the terminal stations which are to be connected, for each of the wireless communications units based on the calculated setting policy and switching policy.
-
公开(公告)号：US11804881B2
公开(公告)日：2023-10-31
申请号：US17278693
申请日：2019-10-18
IPC分类号： H01Q3/04 , H04B7/08 , H04L27/26 , H04B7/0413 , H04B7/0426 , H01Q1/24 , H01Q3/24
CPC分类号： H04B7/043 , H01Q1/246 , H01Q3/04 , H01Q3/24 , H04B7/0413 , H04B7/0805 , H04B7/0837 , H04L27/2647
摘要： A characteristic variable antenna configured to be able to select or switch antenna characteristics in accordance with a predetermined periodic variable timing, an RF unit configured to perform a reception process on a signal received by the characteristic variable antenna, an ADC unit configured to sample the analog signal input from the RF unit at a sampling period corresponding to the variable timing of the antenna characteristics of the characteristic variable antenna, a signal dividing unit configured to divide the digital signal input from the ADC unit into different digital signals in accordance with the antenna characteristics and output the divided different digital signals, a MIMO-OFDM demodulation unit configured to receive inputs of the different digital signals divided by the signal dividing unit and perform a demodulation process of predetermined MIMO-OFDM, and a control unit configured to periodically select or switch the antenna characteristics of the characteristic variable antenna in accordance with the sampling period of the ADC unit are included.
-
16.发明申请公开(公告)号：US20220248252A1
公开(公告)日：2022-08-04
申请号：US17610785
申请日：2019-06-10
发明人： Toshiro Nakahira , Hirantha Abeysekera , Tomoki Murakami , Koichi Ishihara , Takafumi HAYASHI , Yasushi TAKATORI
摘要： A wireless communication system in which wireless stations perform transmission, a plurality of wireless modules that are operated in a shared frequency band being installed in the wireless stations, wherein the wireless stations each include means for notifying a control device of environment information that includes capacity information regarding the wireless station and information regarding a surrounding wireless environment, and setting frequency channels in the plurality of wireless modules, the wireless stations being notified of the frequency channels by the control device, and the control device includes means for calculating a frequency channel of each wireless module of each wireless station based on the environment information collected from each wireless station, following a control guideline that is determined in advance, and notifying the wireless stations of the frequency channels.
-
17.发明申请公开(公告)号：US20220232587A1
公开(公告)日：2022-07-21
申请号：US17610755
申请日：2019-06-10
发明人： Toshiro Nakahira , Hirantha Abeysekera , Tomoki Murakami , Koichi Ishihara , Takafumi HAYASHI , Yasushi TAKATORI
摘要： A wireless communication system in which wireless stations perform transmission, a plurality of wireless modules that are operated in a shared frequency band being installed in the wireless stations, wherein the wireless stations each include means for notifying a control device of environment information that includes capacity information regarding the wireless station and information regarding a surrounding wireless environment, the control device includes means for determining an operation mode of each wireless module of each wireless station based on the environment information collected from each wireless station, following a control guideline that is determined in advance, and notifying the wireless stations of the operation modes, and the wireless stations each include means for setting the operation modes in the plurality of wireless modules and changing connection of connection destination wireless stations according to the operation modes of the wireless modules, the wireless stations being notified of the operation modes by the control device.
-
18.发明申请公开(公告)号：US20220232485A1
公开(公告)日：2022-07-21
申请号：US17610752
申请日：2019-06-10
发明人： Toshiro Nakahira , Hirantha Abeysekera , Tomoki Murakami , Koichi Ishihara , Takafumi HAYASHI , Yasushi TAKATORI
摘要： A wireless communication system in which wireless stations perform transmission, a plurality of wireless modules that are operated in a shared frequency band being installed in the wireless stations, wherein the wireless stations each include means for notifying a control device of environment information that includes capacity information regarding the wireless station and information regarding a surrounding wireless environment, and setting transmission power values in the plurality of wireless modules, the wireless stations being notified of the transmission power values by the control device, and the control device includes means for calculating a transmission power value of each wireless module of each wireless station based on the environment information collected from each wireless station, following a control guideline that is determined in advance, and notifying the wireless stations of the transmission power values.
-
公开(公告)号：US11265841B2
公开(公告)日：2022-03-01
申请号：US17059092
申请日：2019-05-23
发明人： Masamichi Hosoda , Yasushi Hanakago , Tadashi Mori , Masaru Miyamoto , Tomoki Murakami , Makoto Umeuchi , Hiroshi Sakamoto , Tomoaki Ogawa
IPC分类号： H04W64/00 , H04B17/309
摘要： An object is to enable high-accuracy position estimation of a wireless terminal station by efficiently performing connection between a wireless base station and the wireless terminal station using multiple distributed antennas. A position estimation apparatus configured to estimate a position of a wireless terminal station between a wireless base station that can perform transmission and reception by switching between a plurality of distributed antennas arranged in a distributed manner via cables with known lengths, and the wireless terminal station configured to communicate with the wireless base station, includes: a means 1 for measuring a no-delay RTT or measuring a statistical processing RTT when the wireless base station exchanges a measurement signal and a response signal with the wireless terminal station in each of the distributed antennas and measures an RTT, which is a round trip time between the wireless base station and the wireless terminal station, a delay time having been removed from the no-delay RTT using a reception time of the measurement signal and a transmission time of the response signal, and the statistical processing RTT being measured using statistical processing for making the delay time constant using a plurality of instances of exchanging a measurement signal and a response signal; and means 2 for estimating the position of the wireless terminal station based on the no-delay RTT or the statistical processing RTT of each of the distributed antennas.
-
公开(公告)号：US10778296B2
公开(公告)日：2020-09-15
申请号：US16596729
申请日：2019-10-08
发明人： Tomoki Murakami , Yusuke Asai , Riichi Kudo , Koichi Ishihara , Masato Mizoguchi , Takeo Ichikawa
IPC分类号： H04B7/0452 , H04J11/00 , H04L5/00 , H04L27/26 , H04W28/16 , H04B7/024 , H04B7/06 , H04B7/0456 , H04W88/08
摘要： Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.
-
-
-
-
-
-
-
-
-
搜索结果
62 条记录 (耗时 0.024 秒)
