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公开(公告)号：US10938505B2
公开(公告)日：2021-03-02
申请号：US15751528
申请日：2016-08-08
申请人： NTT DOCOMO, INC.
摘要： A user terminal includes a receiver that receives a downlink shared channel and a processor that obtains a transport block size (TBS) used for the downlink shared channel based on: a TBS index value that is associated with a modulation and coding scheme (MCS) index value used for the downlink shared channel; and a number of resource blocks (RBs) that are allocated to the downlink shared channel. When the downlink shared channel is transmitted by a predetermined transmission scheme and the MCS index value is a predetermined value, the processor modifies the TBS index value associated with the predetermined value and obtains the TBS based on the modified TBS index value and the number of RBs.
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公开(公告)号：US20210028979A1
公开(公告)日：2021-01-28
申请号：US16980170
申请日：2018-03-13
申请人： NTT DOCOMO, INC.
发明人： Kazuki Takeda , Hideaki Takahashi , Satoshi Nagata
摘要： A terminal is disclosed including a receiver that receives configuration information comprising control resource set (CORESET) configuration information, the configuration information being used for configuring a cell-specific parameter for a downlink control channel; and a processor that determines a CORESET based on the CORESET configuration information. In other aspects, a radio communication method and a base station are also disclosed.
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公开(公告)号：US10779263B2
公开(公告)日：2020-09-15
申请号：US14762993
申请日：2014-01-20
申请人： NTT DOCOMO, INC.
摘要： Techniques for assigning uplink dedicated resources in inter-site or inter-eNB carrier aggregation promptly are disclosed. One aspect of the present invention relates to a base station including a transmission and reception unit configured to use radio resources to communicate with a user equipment and a resource management unit configured to manage the radio resources, wherein the resource management unit comprises a pooling information storage unit configured to store pooling information indicative of radio resources reserved for the base station by a non-anchor base station in inter-eNB carrier aggregation, and the resource management unit autonomously assigns the radio resources indicated in the pooling information to the user equipment.
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公开(公告)号：US10764956B2
公开(公告)日：2020-09-01
申请号：US16091477
申请日：2017-04-06
申请人： NTT DOCOMO, INC.
摘要： There is provided user equipment for communicating with a first base station and a second base station, the user equipment including a receiver that receives, form the first base station or the second base station with which an RRC connection is established, a first message indicating to establish a split bearer between the first base station and the second base station; and a communicator that establishes the split bearer between the first base station and the second base station that are reported by the first message, wherein, in the split bearer, a process of a PDCP layer is performed by one of the first base station and the second base station.
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公开(公告)号：US20200260494A1
公开(公告)日：2020-08-13
申请号：US16637610
申请日：2018-08-07
申请人： NTT DOCOMO, INC.
发明人： Hideaki Takahashi , Tooru Uchino
摘要： eNB (100A) configures a split bearer that goes from a core network via SCG and from the SCG splits toward the eNB (100A) included in MCG. The eNB (100A) reconfigures, when UE (200) reconnects to the same SCG as that before release of resources, the split bearer that uses retained upper layer resources. The UE (200) executes a random access procedure with gNB (100B) included in the SCG to which the UE (200) is reconnected.
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公开(公告)号：US20200252884A1
公开(公告)日：2020-08-06
申请号：US15754969
申请日：2016-08-22
申请人： NTT DOCOMO, INC.
发明人： Hideaki Takahashi , Hiromasa Umeda
摘要： A user equipment includes: selection means configured to receive a plurality of signaling values and a plurality of maximum transmission power values corresponding to the plurality of signaling values from a base station, to select one signaling value of the plurality of signaling values, and to select the maximum transmission power value corresponding to the selected signaling value; and control means configured to perform cell selection or cell reselection by determining whether a reception level value in a cell to be determined satisfies a predetermined condition using a correction value, which is obtained by subtracting a compensation value based on the maximum transmission power value from a minimum reception level value predetermined for the cell to be determined in the cell selection or cell reselection, and the reception level value measured for the cell to be determined.
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公开(公告)号：US20200236696A1
公开(公告)日：2020-07-23
申请号：US16652314
申请日：2018-09-25
申请人： NTT DOCOMO, INC.
发明人： Hideaki Takahashi , Yousuke Sano , Hiromasa Umeda
摘要： A user apparatus communicates with a base station. The user apparatus includes a generation unit configured to generate terminal capability information including information indicating an uplink band combination and information indicating whether capable of simultaneous transmission in the uplink band combination, a transmission unit configured to transmit the generated terminal capability information to the base station apparatus, and a reception unit configured to receive an uplink scheduling assignment from the base station apparatus. The simultaneous transmission is performed in the uplink band combination based on the uplink scheduling assignment.
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公开(公告)号：US20200084699A1
公开(公告)日：2020-03-12
申请号：US16468877
申请日：2017-11-20
申请人： NTT DOCOMO, INC.
摘要： A disclosed base station includes a common broadcast information transmitter configured to transmit common broadcast information transmitted in common to a plurality of types of user equipment; and type-specific broadcast information transmitter configured to transmit type-specific broadcast information for each type of the user equipment, in accordance with scheduling information in the common broadcast information.
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公开(公告)号：US10542580B2
公开(公告)日：2020-01-21
申请号：US16318456
申请日：2017-08-04
申请人： NTT DOCOMO, INC.
摘要： Disclosed is a radio communication system capable of implementing a state transition related to an intermediate state between a connected state and an idle state.An aspect of the present invention relates to a user equipment, wherein the user equipment includes a state management unit that manages a communication state of the user equipment, and a state transition unit that causes the communication state of the user equipment to transition, and when the user equipment is communicating with the first base station, if cell reselection for the second base station is performed, the state transition unit performs the cell reselection for the second base station while the state management unit retains first radio parameter information for radio communication between the user equipment and the first base station and a first context identifier specifying the first radio parameter information.
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公开(公告)号：US10531340B2
公开(公告)日：2020-01-07
申请号：US14765901
申请日：2014-01-21
申请人： NTT DOCOMO, INC.
摘要： Some techniques for promptly assigning uplink dedicated resources in inter-site or inter-eNB carrier aggregation are disclosed. One aspect of the present invention relates to a user equipment including a transmission and reception unit configured to use radio resources to communicate with multiple base stations, a resource management unit configured to manage the radio resources and a cell type determination unit configured to determine a type of a cell providing the radio resources, wherein when the resource management unit detects occurrence of a release trigger for assigned uplink dedicated resources, the cell type determination unit determines a type of a cell providing the uplink dedicated resources and retains or releases the uplink dedicated resources depending on the determined cell type.
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