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公开(公告)号：US20240040515A1
公开(公告)日：2024-02-01
申请号：US18117115
申请日：2023-03-03
发明人： HIDEO NAMBA , RYOTA YAMADA , ATSUSHI SHIRAKAWA
CPC分类号： H04W52/245 , H04W52/367
摘要： A base station apparatus transmits, to a terminal apparatus, SR link information including information indicating multiple terminal apparatuses supporting intra-BSS SR, a color index associated with the information indicating the terminal apparatuses, and information of a power detection level corresponding to a combination of the terminal apparatuses. The terminal apparatus receives the SR link information. The terminal apparatus receives a radio frame, and compares the power detection level determined based on the color index included in a PHY header of the radio frame being received, the multiple terminal apparatuses indicated by the color index, the information of the power detection level corresponding to the multiple terminal apparatuses indicated by the color index, and transmit power and received power of the radio frame being received. In a case that the received power of the radio frame being received is low, the terminal apparatus performs CCA reset, and transmits the radio frame with the transmit power configured. Intra-BSS SR is performed for data used by an application in which traffic with high priority and/or with low latency is specified to allow communication efficiency to be improved in coordination with the application.
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公开(公告)号：US20230254735A1
公开(公告)日：2023-08-10
申请号：US17690884
申请日：2022-03-09
发明人： HIDEO NAMBA , RYOTA YAMADA
CPC分类号： H04W28/06 , H04W72/0406
摘要： A radio communication apparatus that communicates with a base station apparatus and another radio communication apparatus includes a receive circuitry that receives a radio frame, a transmit circuitry that transmits a radio frame, and a control circuitry that controls transmission and/or reception of a radio frame. The receive circuitry receives a radio frame, a PHY header of the received radio frame is demodulated, and in a case that first information, included in the PHY header currently being received, to identify a radio system indicates a radio system where the radio communication apparatus belongs and that a predetermined condition is satisfied, a radio frame is transmitted to fit within NAV of the PHY header currently being received.
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公开(公告)号：US20220201672A1
公开(公告)日：2022-06-23
申请号：US17275161
申请日：2019-09-06
发明人： HIROMICHI TOMEBA , RYOTA YAMADA
摘要： A terminal device and a communication method are provided. The terminal device includes a receiver for receiving sounding reference signal (SRS) setting information and setting information for signals having a spatial correlation set to a SRS, and a transmitter for transmitting the SRS. The SRS setting information includes information indicating the spatial correlation to the SRS. The receiver, when receiving the signals having the spatial correlation set to the SRS, sets a first spatial domain reception filter and a second spatial domain reception filter. The transmitter, when transmitting the SRS, sets a first spatial domain transmission filter and a second spatial domain transmission filter. The first spatial domain reception filter and the first spatial domain transmission filter are set with beam correspondence. The second spatial domain reception filter and the second spatial domain transmission filter are set with beam correspondence.
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公开(公告)号：US20220006582A1
公开(公告)日：2022-01-06
申请号：US17288884
申请日：2019-10-24
摘要： To provide a terminal apparatus and a communication method capable of improving reliability and frequency efficiency in a case of transmission by beamforming. Provided are a higher layer processing unit configured with demodulation reference signal (DMRS) antenna port groups for indicating two groups of antenna ports of a DMRS, a receiver configured to receive the DMRS, downlink control information (DCI), and a downlink shared channel (PDSCH), and a decoding unit configured to decode the PDSCH, wherein the PDSCH includes a transport block, and in a case that the number of the transport blocks configured in the DCI is one, the PDSCH demodulated using a DMRS of a first group and/or the PDSCH demodulated using a DMRS of a second group is used to decode one transport block.
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公开(公告)号：US20210274527A1
公开(公告)日：2021-09-02
申请号：US17276632
申请日：2019-09-06
发明人： OSAMU NAKAMURA , RYOTA YAMADA
摘要： Repeated transmission in a slot is efficiently performed with less control information. In a case that a parameter related to frequency hopping is configured to intra-slot hopping, a slot is divided into a first section and a second section and at least one demodulation reference signal is mapped to each of the first section and the second section. In a case that a parameter related to PUSCH repetition in a slot is enabled, a first section and a second section are generated according to a criterion identical to a criterion used in a case that information related to the frequency hopping is enabled, at least one demodulation reference signal is mapped to the first section and the second section, two PUSCHs generated from a same transport block are generated, and the two generated PUSCHs are mapped to the first section and the second section.
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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：US20200220680A1
公开(公告)日：2020-07-09
申请号：US16647834
申请日：2018-09-10
发明人： RYOTA YAMADA , HIROMICHI TOMEBA
摘要： Included are a higher layer processing unit configured to configure multiple sounding reference signal (SRS) resources; a receiver configured to receive an SRS by using the multiple SRS resources configured; a measuring unit configured to generate, from the SRS, information (SRI) indicating one of the multiple SRS resources; and a transmitter configured to transmit downlink control information, wherein the downlink control information includes a plurality of the SRIs, and the plurality of the SRIs are associated with at least one layer.
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公开(公告)号：US20200014446A1
公开(公告)日：2020-01-09
申请号：US16337845
申请日：2017-08-29
发明人： HIROMICHI TOMEBA , RYOTA YAMADA
IPC分类号： H04B7/06 , H04L5/00 , H04B7/0456 , H04B7/0417 , H04B17/336 , H04W80/08
摘要： To provide a base station apparatus, a terminal apparatus and a communication method which enable improvements in throughput and communication quality while suppressing an increase in complexity even in a case that the accuracy of a CSI report is improved. A terminal apparatus is provide with: a receiver configured to receive a CSI-RS and configuration information of a CSI report; and a transmitter configured to transmit CSI relating to the CSI-RS, wherein the CSI includes a first PMI and a second PMI, the first PMI is an indicator indicating multiple vectors, the second PMI includes either or both of a first indicator and a second indicator, the first indicator is an indicator indicating one or more complex weights of a first dimension for the multiple vectors, the second indicator is an indicator indicating one or more complex weights of a second dimension for the multiple vectors, and configuration information of the CSI report includes information indicating whether or not the second PMI includes the first indicator.
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公开(公告)号：US20190230521A1
公开(公告)日：2019-07-25
申请号：US16313428
申请日：2017-06-22
发明人： HIROMICHI TOMEBA , RYOTA YAMADA
摘要： A base station apparatus, a terminal apparatus, and a communication method are provided that achieve a radio access network in which beam sweeping is appropriately performed in an environment in which a plurality of frame formats are used in a multiplexed fashion. The terminal apparatus according to the present invention includes an antenna unit configured to have a plurality of beam patterns configurable, a receiver configured to acquire information for indicating at least one of a plurality of frame configurations, and a beam sweeping unit configured to perform beam sweeping based on a prescribed frame configuration in a case that the information for indicating the one of the plurality of frame configurations indicates the prescribed frame configuration.
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公开(公告)号：US20190141731A1
公开(公告)日：2019-05-09
申请号：US16099935
申请日：2017-05-10
摘要： Provided are a base station apparatus, a terminal apparatus, and a communication method, in a case that uplink data transmission based on orthogonal multiple access and uplink data transmission based on non-orthogonal multiple access coexist in a cell in which many terminal apparatuses present, capable of maintaining a prescribed communication quality for the uplink data. The base station apparatus for communicating with a terminal apparatus configured to support contention based access and non-contention based access transmits, in a case that an uplink data channel received in a non-contention based manner occurs in a subframe including the contention based access region, a contention based transmission configuration change notification with respect to a subframe configured to receive the uplink data channel.
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