-
公开(公告)号：US20210127341A1
公开(公告)日：2021-04-29
申请号：US16074120
申请日：2017-01-06
Applicant: NTT DOCOMO, INC.
Inventor： Shimpei Yasukawa , Satoshi Nagata , Qun Zhao , Liu Liu , Anxin Li , Huiling Jiang
IPC: H04W56/00 , H04W4/70 , H04W24/10 , H04B17/318
Abstract: There is provided user equipment of a radio communication system that supports D2D communication, the user equipment including a receiver configured to receive a predetermined synchronization signal; a synchronization processor configured to perform a process for synchronizing with the predetermined synchronization signal; and a transmitter configured to transmit a synchronization signal in a subframe that is the same as that of a synchronization signal transmitted from any other user equipment when the synchronization signal transmitted from the other user equipment is received by the receiver and received power of the synchronization signal transmitted from the other user equipment is less than a predetermined threshold value, wherein the transmitter interrupts transmission of the synchronization signal for a predetermined time interval, and the receiver measures the received power of the synchronization signal transmitted from the other user equipment in the predetermined time interval.
-
公开(公告)号：US20210119756A1
公开(公告)日：2021-04-22
申请号：US16496255
申请日：2017-03-23
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou , Huiling Jiang
Abstract: To control UL transmission properly even when uplink data and demodulation reference signals are transmitted using short TTIs, a user terminal according to one aspect of the present invention has a transmission section that transmits a UL signal and a reference signal for use for demodulating the UL signal, and a control section that controls the allocation of the UL signal and the reference signal, and, when UL signals are allocated to a plurality of contiguous predetermined time intervals (sTTIs), respectively, the control section allocates the UL signal and the reference signal for use for demodulating the UL signal to the same sTTI, at least in an sTTI apart from the top sTTI.
-
公开(公告)号：US10945248B2
公开(公告)日：2021-03-09
申请号：US15543596
申请日：2016-01-29
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Liu Liu , Huiling Jiang , Qin Mu
IPC: H04L12/801 , H04L5/14 , H04L29/06 , H04L1/00 , H04W72/04 , H04J11/00 , H04W74/08 , H04W76/27 , H04W88/02 , H04W88/08
Abstract: The present invention is designed so that communication can be carried out adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth. According to an example of the present invention, a user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has an acquiring section that acquires EPDCCH (Enhanced PDCCH) configuration information based on information that is reported from a radio base station without using a PDCCH (Physical Downlink Control Channel), and a receiving section that detects a user terminal-specific search space (USS: UE-specific Search Space) of an EPDCCH based on the EPDCCH configuration information.
-
公开(公告)号：US10798563B2
公开(公告)日：2020-10-06
申请号：US16312482
申请日：2017-08-10
Applicant: NTT DOCOMO, INC.
Inventor： Kazuaki Takeda , Satoshi Nagata , Naoto Ookubo , Qin Mu , Liu Liu , Huiling Jiang
Abstract: The present invention provides a method for configuring a hybrid automatic repeat request (HARQ) mode in a base station, a communication method for use by user terminal supporting communication capabilities of the first type, a base station and user terminal. This user terminal includes a transmission section that transmits information about a capability for supporting HARQ bundling, to a radio base station, and the transmission section transmits bundled HARQ-ACKs to the radio base station based on the capability.
-
公开(公告)号：US10779170B2
公开(公告)日：2020-09-15
申请号：US16085188
申请日：2017-03-14
Applicant: NTT DOCOMO, INC.
Inventor： Satoshi Nagata , Qin Mu , Liu Liu , Huiling Jiang
Abstract: The present invention is designed to provide a master information block (MIB) suitable for an NB-IoT communication system. A base station according to an embodiment of the present invention includes a generation section that generates a master information block (MIB) including parameters selected based on an operation mode during narrow band communication, and a transmission section that transmits the MIB.
-
Patent Agency Ranking
公开(公告)号：US10764856B2
公开(公告)日：2020-09-01
申请号：US16323207
申请日：2017-07-07
Applicant: NTT DOCOMO, INC.
Inventor： Neng Ye , Xiangming Li , Anxin Li , Xiaohang Chen , Qun Zhao , Huiling Jiang
Abstract: The present application provides an uplink data transmission method and a user terminal (UE) for executing the method. The method in the present application comprises: A, generating a first random number; B, determining, according to the generated first random number, whether to initiate a random access process; if the random access process is initiated, obtaining a timing advance (TA) value from a base station by means of the random access process; and if the random access process is not initiated, listening for a TA message broadcast by another UE and obtaining a TA value from the TA message; C, transmitting uplink data according to the obtained TA value; D, if the uplink data is successfully transmitted, continuing to perform E, and if the uplink data is unsuccessfully transmitted, returning to A; and E, generating a TA message according to the obtained TA value, and broadcasting the generated TA message. By means of the method in the present application, the time delay and the power consumption can be reduced.
-
公开(公告)号：US20200100240A1
公开(公告)日：2020-03-26
申请号：US16495479
申请日：2017-03-23
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou , Huiling Jiang
Abstract: In order to support the transmission of uplink control information adequately even when shortened TTIs are used, a user terminal according to one aspect of the present invention has a transmitting section that transmits uplink control information by using a shortened TTI, in which a length of a transmission time interval (TTI) is shorter than 1 ms, and a control section that controls transmission of the uplink control information by using a given uplink control channel format for the shortened TTI, based on the number of bits of uplink control information transmitted in the shortened TTI.
-
公开(公告)号：US20200044702A1
公开(公告)日：2020-02-06
申请号：US16496771
申请日：2018-03-22
Applicant: NTT DOCOMO, INC.
Inventor： Yuichi Kakishima , Chongning Na , Huiling Li , Huiling Jiang , Satoshi Nagata
IPC: H04B7/0456 , H04B7/06 , H04L5/00
Abstract: A user equipment (UE) is disclosed including a receiver that receives, from a base station (BS), Channel State Information-Reference Signals (CSI-RSs) using a plurality of first beams. The UE further includes a processor that selects a first matrix W1 from a first codebook and a second matrix W2 from a second codebook, and selects second beams from the plurality of first beams. The UE further includes a transmitter that performs CSI reporting that includes precoding matrix indicators (PMIs) corresponding to the W1 and W2. The W1 indicates a plurality of sets of the second beams in each of a first layer and a second layer. The plurality of sets adjacent to each other are orthogonal. The W2 indicates a combination of same beams between the first layer and the second layer.
-
公开(公告)号：US20200015261A1
公开(公告)日：2020-01-09
申请号：US16490105
申请日：2017-03-02
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Lihui Wang , Xiaolin Hou , Huiling Jiang
Abstract: The present invention is designed to prevent communicating directions from conflicting with each other. According to one aspect of the present invention, a terminal has a receiving section that receives downlink control information to schedule transmission and/or receipt of data in a predetermined slot, and a control section that judges the direction of communication in the predetermined slot and that controls transmission and/or receipt.
-
公开(公告)号：US20200015119A1
公开(公告)日：2020-01-09
申请号：US16490268
申请日：2017-03-02
Applicant: NTT DOCOMO, INC.
Inventor： Kazuki Takeda , Satoshi Nagata , Qun Zhao , Xiaohang Chen , Xiaolin Hou , Huiling Jiang
Abstract: The present invention is designed to prevent communication performance from dropping in long TTI when preemption of long TTI by short TTI occurs. According to one aspect of the present invention, a user terminal has a receiving section that receives downlink (DL) data based on downlink control information (DCI) in a first transmission time interval (TTI), a transmission section that transmits delivery acknowledgement information in response to the DL data, and a control section that controls timing of transmitting the delivery acknowledgement information when indication information regarding preemption of the first TTI by a second TTI shorter than the first TTI is received in the receiving section.
-
-
-
-
-
-
-
-
-
Search Results
270
records
(took 0.026 seconds)
