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公开(公告)号：US11470638B2
公开(公告)日：2022-10-11
申请号：US15554717
申请日：2016-03-10
IPC分类号： H04B17/318 , H04W52/24 , H04L12/413 , H04W72/04 , H04L27/28 , H04W52/04 , H04L1/00 , H04L5/00 , H04W74/08 , H04W52/34 , H04W84/12
摘要： Provided are a terminal apparatus and a communication method that are able to improve communication quality and an acquisition rate of transmission opportunity in a communication system requiring carrier sense. The terminal apparatus of the invention includes a reception unit that receives a frame and changes a CCA method on the basis of information included in the frame. The CCA method includes a method of setting a CCA level as a value other than a predetermined value of the CCA level. The reception unit has a function of performing carrier sense and a method of changing the CCA level includes a method of setting a period in which the carrier sense is performed as a value other than a value of a predetermined carrier sense period.
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公开(公告)号：US11368959B2
公开(公告)日：2022-06-21
申请号：US15524201
申请日：2015-11-02
IPC分类号： H04W72/04 , H04W24/10 , H04J1/00 , H04J11/00 , H04L5/00 , H04B7/0456 , H04L1/00 , H04W88/02 , H04W88/08
摘要： The present invention provides a base station apparatus, a terminal apparatus, and a communication method, which are capable of throughput improvement. A base station apparatus that communicates with a terminal apparatus, includes a higher layer processing unit that configures a CSI process that is a configuration relating to reporting of a channel state information (CSI), for the terminal apparatus for which a prescribed transmission mode is configured, in which the CSI process includes a configuration of a CSI reference signal and a configuration relating to two different code books. A terminal apparatus that communicates with a base station apparatus, includes a higher layer processing unit for which a CSI process that is a configuration relating to reporting of channel state information (CSI) is configured by the base station apparatus, and a transmission unit that transmits the CSI based on the CSI process, in which the CSI information includes a configuration of a CSI reference signal and a configuration relating to two different code books.
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公开(公告)号：US11290997B2
公开(公告)日：2022-03-29
申请号：US16956900
申请日：2018-11-12
发明人： Hiromichi Tomeba , Ryota Yamada , Hideo Namba , Atsushi Shirakawa
摘要： A base station apparatus according to the present invention includes a transmitter configured to transmit a downlink signal by using a first component carrier and a second component carrier, and a receiver configured to receive an uplink signal transmitted by the terminal apparatus by using at least the second component carrier. The transmitter transmits spatial relation information in the uplink signal, the spatial relation information is information indicating a spatial domain transmission filter for transmitting the uplink signal, and the spatial relation information in the second component carrier includes information indicating the first component carrier.
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公开(公告)号：US11233542B2
公开(公告)日：2022-01-25
申请号：US16071164
申请日：2017-01-18
IPC分类号： H04B7/0408 , H04L5/00 , H04W16/28
摘要： Communication efficiency can be enhanced during multiplex communication. A radio control station apparatus includes a multi-beam antenna unit capable of controlling each of a plurality of beam performances and an RF system for transmission. The RF system further includes a multiplexing unit configured to perform multiplexing by using a plurality of frequency channels or a plurality of sub-carriers, allocates at least one of the plurality of different frequency channels or at least one of the plurality of different sub-carriers to each of transmit signals to be transmitted to the plurality of radio terminal apparatuses, multiplexes the above allocated frequency channels or sub-carriers in the multiplexing unit, and transmits the multiplexed signal through the multi-beam antenna unit using a plurality of beams.
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公开(公告)号：US11228476B2
公开(公告)日：2022-01-18
申请号：US16954519
申请日：2018-11-08
发明人： Ryota Yamada , Hiromichi Tomeba , Hideo Namba , Atsushi Shirakawa
摘要： A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a receiver configured to receive downlink control information and a downlink shared channel; and a signal detection unit configured to demodulate the downlink shared channel (PDSCH) by using the downlink control information, wherein the downlink control information includes information for indicating an antenna port number and the number of code division multiplexing (CDM) groups for a demodulation reference signal (DMRS), each of the CDM groups indicates a DMRS port to be multiplexed by CDM, the PDSCH is demodulated in consideration of a power ratio of the DMRS and the PDSCH, and whether or not to consider powers of the DMRS and the PDSCH, based on the number of the CDM groups, is determined based on the downlink control information.
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公开(公告)号：US20210167922A1
公开(公告)日：2021-06-03
申请号：US17172215
申请日：2021-02-10
发明人： RYOTA YAMADA , Hiromichi Tomeba
摘要： A base station apparatus includes a downlink reference signal generation unit configured to generate a first demodulation reference signal and a second demodulation reference signal that are reference signals used to demodulate a data signal, and a radio transmitting unit configured to transmit the first demodulation reference signal, the second demodulation reference signal, and control information to the terminal apparatus. The control information includes parameters regarding the first demodulation reference signal and parameters regarding the second demodulation reference signal. The parameters regarding the first demodulation reference signal include an antenna port number. The parameters regarding the second demodulation reference signal include an antenna port number, and a time domain density or a frequency domain density with which demodulation reference signals are mapped into a slot. The first demodulation reference signal is mapped before the second demodulation reference signal in the slot.
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公开(公告)号：US11006453B2
公开(公告)日：2021-05-11
申请号：US16657240
申请日：2019-10-18
摘要： A CCA level is made to be variable efficiently while maintaining the fairness relating to acquisition of a transmission opportunity by wireless terminal apparatuses, and thus efficiency of a radio resource is improved. Provided is a terminal apparatus that performs wireless communication with a base station apparatus, and includes; a MAC frame categorization unit categorizing MAC frames, in each of which media access control header is attached to transmission data, based on a type of MAC frame; and a QoS control unit performing a carrier sense using a first CCA level, in a case where the MAC frame is included in a first category that results from the categorization by the MAC frame categorization unit, and performing the carrier sense using a second CCA level different from the first CCA level, in a case where the MAC frame is included in a second category different from the first category.
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公开(公告)号：US10999868B2
公开(公告)日：2021-05-04
申请号：US16313098
申请日：2017-06-27
发明人： Hiromichi Tomeba , Ryota Yamada
摘要： To provide a base station apparatus, a terminal apparatus, and a communication method for achieving a high frequency efficiency while coexisting with other radio access system under environment where multiple frame formats are multiplexed for use. A base station apparatus according to the present invention comprises a receiver that performs carrier sense on the second frequency band based on a predetermined frame configuration among a plurality of frame configurations to obtain the second frequency band during a predetermined duration, and a transmitter that notifies control information concerning the predetermined frame configuration and transmits a downlink signal to the terminal apparatus during the predetermined duration based on the predetermined frame configuration.
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公开(公告)号：US10856178B2
公开(公告)日：2020-12-01
申请号：US15557061
申请日：2016-03-10
发明人： Hiromichi Tomeba , Tomoki Yoshimura
IPC分类号： H04W28/06 , H04W84/12 , H04L5/00 , H04W72/12 , H04W76/10 , H04W76/28 , H04W74/08 , H04W74/00
摘要： Provided are a radio transmission apparatus, a radio receiving apparatus, a radio communication system, and a communication method that make it possible for the radio transmission apparatus performing OFDMA transmission to highly efficiently determine a radio receiving apparatus that is caused to participate in the OFDMA transmission. The radio transmission apparatus that performs OFDMA transmission with a plurality of radio receiving apparatuses includes a reception unit that has a function of performing carrier sense and a function of receiving a function information response frame including function response information indicating that a function of performing the OFDMA transmission is included, and a transmission unit that has a function of switching whether or not to transmit a frame to at least one of the plurality of radio receiving apparatuses on a basis of the carrier sense.
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公开(公告)号：US10667327B2
公开(公告)日：2020-05-26
申请号：US15579562
申请日：2016-06-02
摘要： A BSS to which a destination wireless communication apparatus of a physical layer frame belongs is identified, and accuracy of preamble detection is improved by changing a reception operation. A wireless communication apparatus includes a reception unit that detects a frame including information for identifying a BSS, and a control unit that switches between a first operation in a case where the frame is a frame which is associated with a BSS to which the wireless communication apparatus belongs and a second operation in a case where the frame is a frame which is not associated with the BSS to which the wireless communication apparatus belongs. Carrier sensing is not performed in the first operation, and the carrier sensing is performed in the second operation.
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