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公开(公告)号：US11038625B2
公开(公告)日：2021-06-15
申请号：US16319460
申请日：2017-06-28
发明人： Ryota Yamada , Tomoki Yoshimura , Hiroki Takahashi
摘要： To improve communication performance such as a throughput and communication efficiency in a system where multiple communication schemes are used. An apparatus includes a transmitter configured to transmit a transmit signal generated from transmission bits, the transmitter including a coding unit configured to generate the transmission bits by coding and rate matching, the coding unit including a first coding unit, a first interleaving unit, a first bit selection unit, a second coding unit, a second interleaving unit, and a second bit selection unit. The first bit selection unit and the second bit selection unit are different in the initial position based on the same redundancy version.
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公开(公告)号：US10660094B2
公开(公告)日：2020-05-19
申请号：US15507007
申请日：2015-08-28
发明人： Katsuya Kato , Kazuyuki Shimezawa , Ryota Yamada
摘要： A terminal device uses a broad band to improve a throughput. A terminal device communicates with a base station apparatus, and includes a higher layer processing unit that receives an instruction from the base station apparatus to perform communication according to a first frame structure used in a prescribed carrier frequency band or to perform communication according to a second frame structure used in a carrier frequency band higher than the prescribed carrier frequency band, and a reception unit that receives a signal of the first frame structure in a case where it is instructed to perform the communication according to the first frame structure, and receives a signal of the second frame structure in a case where it is instructed to perform the communication according to the second frame structure.
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公开(公告)号：US10523289B2
公开(公告)日：2019-12-31
申请号：US15762473
申请日：2016-08-26
发明人： Ryota Yamada , Jungo Goto , Osamu Nakamura
IPC分类号： H04B7/0452 , H04W24/10 , H04J11/00 , H04L5/00 , H04W72/04
摘要： The present invention provides a base station device, a terminal device, and a communication method, where the terminal efficiently learns information of an interference signal and reduces interference in a reception process to make it possible to enhance throughput, enhance communication opportunity of each terminal device by feedback from the terminal, and the like. The base station device includes a transmission unit configured to transmit, to the terminal device, Multiuser Superposition Transmission (MUST) information used for canceling interference due to MUST. The MUST information includes multiple combinations of modulation schemes for the MUST, and a list of power ratios used for the MUST in each of the combinations of the modulation schemes.
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公开(公告)号：US10440671B2
公开(公告)日：2019-10-08
申请号：US15553573
申请日：2016-03-10
摘要： Communication is efficiently performed even when the communication is performed in a high carrier frequency. A terminal apparatus includes: a reception unit configured to receive assistance information from a primary cell and a plurality of synchronization signals from a secondary cell and to perform synchronization on the basis of the assistance information and the plurality of synchronization signals; and a transmission unit configured to transmit measurement information regarding at least one of the plurality of synchronization signals. The assistance information includes respective pieces of information regarding the plurality of synchronization signals. The assistance information includes an ID of each of the plurality of synchronization signals, and the terminal apparatus transmits the ID as the measurement information regarding the synchronization signal.
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公开(公告)号：US10420086B2
公开(公告)日：2019-09-17
申请号：US15122256
申请日：2015-02-26
摘要： Degradation in reception performance due to interference is reduced while suppressing an increase in the amount of control information. There is provided a terminal device including; a higher layer that determines whether or not to apply NAICS; and a reception unit that receives downlink control information, in which, in a case where, with the higher layer, an indication that the NAICS has to be applied is provided, if the downlink control information is detected in a UE-specific search space, signal detection in compliance with the NAICS is performed, and in which, in the case where, with the higher layer, the indication that the NAICS has to be applied is provided, if the downlink control information is received in a common search space, signal detection in compliance with a linear scheme is performed.
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公开(公告)号：US09191155B2
公开(公告)日：2015-11-17
申请号：US14423772
申请日：2013-08-22
发明人： Kazuhiko Fukawa , Hiroshi Suzuki , Satoshi Suyama , Ryota Yamada , Katsuya Kato , Takashi Yoshimoto
CPC分类号： H04L1/0054 , H04B7/0413 , H04B7/0854 , H04L1/0048 , H04L1/0052 , H04L25/0204 , H04L25/067
摘要： The present invention is capable of reducing a calculation amount while lessening performance degradation from MLD. The present invention is a reception device that receives a transmit signal which is transmitted from a transmission device by a MIMO transmission scheme. The reception device includes a channel estimation unit (205) that performs channel estimation using a received signal, and calculates a channel estimation value, a signal detection unit (206) that generates a bit log-likelihood ratio by MIMO demultiplexing of a received signal based on the channel estimation value, and a decoding unit (207) that performs error correction decoding with respect to the bit log-likelihood ratio. The signal detection unit (206) includes a transmit signal candidate search unit (301) that searches for a transmit signal candidate based on an error of linear detection depending on the received signal and the channel estimation value, a transmit signal candidate generation unit (302) that generates a transmit signal candidate by hard decision of an output of the transmit signal candidate search unit, and a decision unit (303) that generates the bit log-likelihood ratio using the transmit signal candidate.
摘要翻译： 本发明能够减少计算量，同时降低MLD的性能下降。 本发明是一种接收装置，其接收通过MIMO传输方式从发送装置发送的发送信号。 接收装置包括使用接收信号进行信道估计并计算信道估计值的信道估计单元（205），通过基于接收信号的MIMO解复用生成比特对数似然比的信号检测单元（206） 以及对比特对数似然比执行纠错解码的解码单元（207）。 信号检测单元（206）包括发送信号候补搜索单元（301），其根据接收信号和信道估计值，基于线性检测的误差来搜索发送信号候补，发送信号候补生成单元（302 ），其通过发送信号候选搜索单元的输出的硬判决生成发送信号候选，以及使用发送信号候选生成比特对数似然比的判定单元（303）。
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公开(公告)号：US20150296417A1
公开(公告)日：2015-10-15
申请号：US14438943
申请日：2013-10-31
CPC分类号： H04W36/0011 , H04W36/30 , H04W84/045
摘要： In a communication system that includes a first base station, a second base station, and at least one terminal that makes a connection to the second base station, a connection destination of the terminal that makes a connection to the second base station is efficiently switched. The terminal that makes a connection to the second base station determines received quality of each of a neighboring base station that is positioned in the neighborhood of the second base station and the second base station, and notifies a macro cell base station and the second base station of the received quality. Furthermore, the first base station or the second base station determines whether or not the terminal has to perform handover, based on the received quality. In a case where the handover has to be performed, the first base station determines the connection destination of the terminal, based on the received quality notified from the terminal, and provides a handover instruction.
摘要翻译： 在包括第一基站，第二基站以及与第二基站建立连接的至少一个终端的通信系统中，有效地切换与第二基站建立连接的终端的连接目的地。 与第二基站连接的终端确定位于第二基站和第二基站附近的相邻基站中的每个基站的接收质量，并通知宏小区基站和第二基站 的质量。 此外，第一基站或第二基站基于接收到的质量来确定终端是否必须执行切换。 在必须执行切换的情况下，第一基站基于从终端通知的接收质量来确定终端的连接目的地，并提供切换指令。
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8.发明申请BASE STATION DEVICE, TERMINAL DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT 审中-公开基站设备，终端设备，通信系统，通信方法和集成电路公开(公告)号：US20150223202A1
公开(公告)日：2015-08-06
申请号：US14425065
申请日：2013-08-27
CPC分类号： H04W72/005 , H04L5/14 , H04L5/1469 , H04W36/00 , H04W36/0072 , H04W48/12
摘要： Provided are a communication system and a communication method which are capable of preventing control of connection and switching between second base station devices from being complicated in the communication system in which a first base station device and the plurality of second base station devices are disposed so that the second base station devices overlap a cell range of the first base station device. In the communication system in which the first base station device and the plurality of second base station devices are disposed so that the second base station devices overlap the cell range of the first base station device, a transmission unit of the first base station device transmits a broadcast channel for notifying broadcast information of the first base station device and a downlink control channel including broadcast information of the second base station device to a terminal device.
摘要翻译： 提供一种通信系统和通信方法，其能够防止第二基站装置之间的连接和切换的控制在其中设置第一基站装置和多个第二基站装置的通信系统中变得复杂，使得 所述第二基站装置与所述第一基站装置的小区范围重叠。 在第一基站装置和多个第二基站装置配置为使得第二基站装置与第一基站装置的小区范围重叠的通信系统中，第一基站装置的发送部发送 用于向第一基站装置通知广播信息的广播信道和包括第二基站装置的广播信息的下行链路控制信道发送给终端装置。
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9.发明申请COMMUNICATION SYSTEM, COMMUNICATION METHOD, BASE STATION APPARATUS, AND TERMINAL APPARATUS 审中-公开通信系统，通信方法，基站装置和终端装置公开(公告)号：US20150023317A1
公开(公告)日：2015-01-22
申请号：US14385248
申请日：2013-03-11
CPC分类号： H04J11/0056 , H04B7/024 , H04B7/0617 , H04L1/20 , H04L5/0007 , H04L5/0073 , H04W24/02 , H04W72/0426 , H04W72/0453 , H04W72/12 , H04W84/045 , H04W88/02 , H04W88/08
摘要： Frequency utilization efficiency is increased while inter-cell interference is controlled.A communication system 1 includes a base station apparatus and at least one terminal apparatus communicating with each other in each of a plurality of communication areas, with the communication areas adjacent to or overlapping each other. A macro cell base station apparatus 100 in one of the communication areas allocates the same frequency bandwidth to the terminal apparatuses in the communication areas. The macro cell base station apparatus 100 calculates a transmit weight and a receive weight according to which the terminals having the same frequency bandwidth allocated thereto perform coordinated control.
摘要翻译： 频率利用效率提高，而小区间干扰受到控制。 通信系统1包括在多个通信区域中的每一个中彼此通信的基站装置和至少一个终端装置，其中通信区域相邻或彼此重叠。 通信区域之一的宏小区基站装置100向通信区域中的终端装置分配相同的频带宽度。 宏小区基站装置100计算分配有相同频带的终端的协调控制的发送权重和接收权重。
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公开(公告)号：US11601246B2
公开(公告)日：2023-03-07
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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