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公开(公告)号：US10205621B2
公开(公告)日：2019-02-12
申请号：US14813920
申请日：2015-07-30
Applicant: NTT DoCoMo, Inc.
Inventor： Chunlin Yan , Anass Benjebbour , Yang Lan , Anxin Li , Huiling Jiang
Abstract: A transmitting apparatus and a transmitting method are provided. The transmitting apparatus comprises: an encoder configured to encode data for a plurality of user equipments into corresponding encoded signals, respectively; a modulator configured to perform a joint modulation on the encoded signals for the plurality of user equipments to generate modulated signals, wherein the modulator performs the joint modulation by mapping bits of the encoded signals for the plurality of user equipments to a symbol corresponding to each constellation point of a constellation map of the modulated signals so that respective constellation points satisfy a Gray mapping rule; a transmitter configured to transmit the modulated signals.
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公开(公告)号：US20190044664A1
公开(公告)日：2019-02-07
申请号：US16075529
申请日：2017-02-03
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Huiling Jiang
Abstract: To appropriately perform communication even when resource allocation is controlled by a frequency unit (for example, a subcarrier unit) that is smaller than a resource allocation unit of an existing LTE system, the present invention provides a user terminal having: a reception unit that receives downlink control information on a downlink control channel included in a given duration in a given bandwidth; and a control unit that controls uplink data transmission based on the downlink control information. The control unit controls start timing of the uplink data transmission with reference to a last subframe in which the downlink control channel is transmitted in the given duration
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公开(公告)号：US20190037608A1
公开(公告)日：2019-01-31
申请号：US16074475
申请日：2017-02-02
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Lihui Wang , Liu Liu , Huiling Jiang
IPC: H04W74/08
Abstract: To achieve an appropriate random access operation even when multiple carriers to which Listen Before Talk (LBT) is applied belong to one timing advance group (TAG), a user terminal according to an aspect of the present invention includes a control unit for controlling a random access procedure on two or more carriers on which listening is performed before uplink transmission, a transmission unit for transmitting a random access preamble on at least one of the two or more carriers, and a reception unit for receiving a response signal in response to the random access preamble. The control unit controls the transmission unit to stop transmission of the random access preamble on the two or more carriers in accordance with reception of the response signal.
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公开(公告)号：US20180324619A1
公开(公告)日：2018-11-08
申请号：US15772867
申请日：2016-11-02
Applicant: NTT DOCOMO, INC.
Inventor： Hiroki Harada , Satoshi Nagata , Jing Wang , Liu Liu , Huiling Jiang
IPC: H04W24/10 , H04B17/318 , H04B17/345 , H04W16/14 , H04W74/00
Abstract: The present invention is designed to carry out adequate inter-frequency measurements in future radio communication systems. According to one example of the present invention, a user terminal has a receiving section that receives first pattern information, which indicates the time length and the periodicity of a first gap period, and second pattern information, which indicates the time length and the periodicity of a second gap period, and a measurement section that measures inter-frequency received signal intensity in the first gap period that is configured based on the first pattern information, and measures inter-frequency reference signal received power and/or reference signal received quality in the second gap period that is configured based on the second pattern information
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公开(公告)号：US10104696B2
公开(公告)日：2018-10-16
申请号：US15113109
申请日：2015-01-23
Applicant: NTT DOCOMO, INC.
Inventor： Tooru Uchino , Kazuki Takeda , Lan Chen , Huiling Jiang , Liu Liu
Abstract: A user apparatus that communicates with a base station in a mobile communication system, including: a reception unit configured to receive a radio signal from the base station by a downlink control channel; and a control information detection unit configured to detect control information, addressed to the user apparatus, mapped to a predetermined area in a time frequency resource of the downlink control channel by performing blind decoding in a plurality of candidate areas which are candidates of the predetermined area, wherein, the plurality of candidate areas are divided into a common candidate area where a plurality of user apparatuses commonly perform blind decoding and an individual candidate area for the user apparatus, and the control information detection unit performs blind decoding in the individual candidate area without performing blind decoding in the common candidate area during a period when the user apparatus monitors a random access response.
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Patent Agency Ranking
公开(公告)号：US20180294927A1
公开(公告)日：2018-10-11
申请号：US15767685
申请日：2016-11-04
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Satoshi Nagata , Qin Mu , Liu Liu , Huiling Jiang
Abstract: The present invention is designed so that HARQ-ACKs can be transmitted adequately in future radio communication systems. According to one aspect of the present invention, a user terminal has a receiving section that receives a DL signal, and a control section that controls transmission of a delivery acknowledgement signal in response to the DL signal. The receiving section receives information on whether or not transmission of the delivery acknowledgement signal is possible in higher layer signaling and/or in downlink control information, and the control section controls whether or not the delivery acknowledgement signal can be transmitted based on the information on whether or not transmission of the delivery acknowledgement signal is possible.
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公开(公告)号：US20180263061A1
公开(公告)日：2018-09-13
申请号：US15761874
申请日：2016-09-23
Applicant: NTT DOCOMO, INC.
Inventor： Hideyuki Moroga , Kazuaki Takeda , Huiling Jiang , Liu Liu , Qin Mu
CPC classification number: H04W74/0833 , H04L1/1812 , H04L1/189 , H04W72/04 , H04W72/0453 , H04W72/14 , H04W74/08
Abstract: A user terminal is disclosed, where a band to use is limited to a partial narrow band in a system band. The user terminal includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel. A radio base station that communicates with a user terminal is also disclosed, where a band to use is limited to a partial narrow band in a system band. The radio base station includes a transmitter that transmits and/or a receiver that receives a signal, and a controller that controls to transmit information to make the user terminal control repetitious reception and/or repetitious transmission of a control channel in a random access procedure based on a coverage enhancement level for a random access channel.
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公开(公告)号：US20180241532A1
公开(公告)日：2018-08-23
申请号：US15752054
申请日：2016-08-12
Applicant: NTT DOCOMO, INC. , DOCOMO Innovations, Inc.
Inventor： Yuichi Kakishima , Satoshi Nagata , Chongning Na , Xiaolin Hou , Huiling Jiang
Abstract: A method of Channel State Information Reference Signal (CSI-RS) transmission from a base station (BS) to a user equipment (UE) includes reserving, with the BS, a CSI-RS resource used for aperiodic CSI-RS transmission in subframes transmitted from the BS, transmitting, from the BS to the UE, reservation information indicating the CSI-RS resource via higher layer signaling, and transmitting, from the BS to the UE, the aperiodic CSI-RS using the CSI-RS resource.
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公开(公告)号：US20180234954A1
公开(公告)日：2018-08-16
申请号：US15751973
申请日：2016-08-05
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Liu Liu , Huiling Jiang
CPC classification number: H04W72/042 , H04L1/1812 , H04L5/001 , H04L5/0055 , H04W28/04 , H04W48/08 , H04W72/04
Abstract: The present invention is designed so that it is possible to feed back HARQ-ACKs adequately and prevent the decrease of communication quality even when a plurality of component carriers are configured in a radio communication system. A radio base station communicates with a user terminal that can use a plurality of cells, and has a control section that controls DL transmission from each cell, and a receiving section that receives ACKs/NACKs fed back from the user terminal in response to DL transmission, and, in this radio base station, the control section controls DL transmission by including, in downlink control information of each cell that performs DL transmission, information that indicates whether or not each cell transmitting the downlink control information is a specific cell.
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公开(公告)号：US20180139732A1
公开(公告)日：2018-05-17
申请号：US15572855
申请日：2016-05-13
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Liu Liu , Huiling Jiang
CPC classification number: H04W72/042 , H04L1/0003 , H04L1/0004 , H04L1/001 , H04L1/0026 , H04L1/0073 , H04W88/02 , H04W88/08
Abstract: An aperiodic CSI report is appropriately triggered even when the number of component carriers that can be configured per user terminal is enhanced compared to an existing system. A user terminal includes: a reception section that receives downlink control information including information related to an instruction of transmission of aperiodic channel state information; and a control section that controls the transmission of the aperiodic channel state information, and the control section controls the transmission of the aperiodic channel state information by selecting a first modulation order or a second modulation order according to a number of serving cells and/or an index, where the first modulation order is defined in advance, the second modulation order is equal to or higher than the first modulation order, the serving cells are serving cells for which the transmission of the aperiodic channel state information is instructed, and the index is related to a modulation and coding scheme included in the downlink control information.
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