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21.发明申请公开(公告)号：US20200084715A1
公开(公告)日：2020-03-12
申请号：US16682308
申请日：2019-11-13
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Hiroaki AMINAKA
Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) or the second radio station (2) transmits constraint information to the radio terminal (3). The constraint information contains an information element necessary to specify a reception constraint and/or transmission constraint related to the first cell (10) and/or the second cell (20) when the carrier aggregation is performed. The reception/transmission constraint is a constraint related to downlink signal reception/uplink signal transmission by the radio terminal over one or more subframe periods of the primary cell (10) and the secondary cell (20). It is thus, for example, possible to contribute to reduction in wasteful power consumption in the radio terminal in the carrier aggregation of a plurality of cells served by different radio stations.
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公开(公告)号：US20200037208A1
公开(公告)日：2020-01-30
申请号：US16594570
申请日：2019-10-07
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A secondary base station (2) is configured to receive an SeNB addition request message from a second master base station (3) while providing a radio terminal (1) with a secondary cell group (SCG) for DC in cooperation with a first master base station. The SeNB addition request message indicates whether each of at least one bearer that has already been configured in the secondary base station (2) for DC with the first master base station (1) is to be kept at the secondary base station (2). It is thus, for example, possible to contribute to performing a procedure for changing a master base station in Dual Connectivity (DC) by using existing inter-base station interface procedures and inter-base station signaling messages.
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公开(公告)号：US20190200237A1
公开(公告)日：2019-06-27
申请号：US16286938
申请日：2019-02-27
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI
CPC classification number: H04W16/14 , H04W48/16 , H04W56/00 , H04W56/001 , H04W72/04
Abstract: A radio terminal (3) operates to perform a predetermined process regarding a first cell (Cell #2) on an unlicensed frequency (F2) based on a predetermined relationship between a frame timing of a first serving cell (Cell #1) using a licensed frequency (F1) and a frame timing of the first cell (Cell #2) using the unlicensed frequency (F2). This contributes, for example, to enabling a radio terminal to differentiate among two or more cells when these cells use the same cell identifier.
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24.发明申请公开(公告)号：US20190166570A1
公开(公告)日：2019-05-30
申请号：US16265446
申请日：2019-02-01
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI
Abstract: A radio station, a radio terminal, and a method for synchronization timer control are provided that can reduce a delay as much as possible until uplink signal resynchronization is done in a case where a plurality of cell groups exist. In a radio communication system having a function of using a plurality of radio resources corresponding to a plurality of cells, respectively, for communication between a radio station (10) and a radio terminal (20), the radio terminal is provided with a plurality of synchronization timers for determining whether or not uplink signals in individual cell groups are in synchronization, wherein the synchronization timers are provided respectively for the plurality of cell groups each including at least one cell, and at the radio terminal (20), uplink-signal transmission on the cells included in a second cell group is controlled depending on a state of a first synchronization timer provided correspondingly for a first cell group including a specific cell and on a state of a second synchronization timer provided correspondingly for the second cell group other than the first cell group, wherein the first synchronization timer and the second synchronization timer are controlled independently.
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25.发明申请公开(公告)号：US20190132898A1
公开(公告)日：2019-05-02
申请号：US16233835
申请日：2018-12-27
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Hiroaki AMINAKA
Abstract: A radio terminal (3) can perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) performs, with the radio terminal (3), radio resource control for the first cell (10) and the second cell (20) in order to perform the carrier aggregation. At least one of the second radio station (2) and the radio terminal (3) is configured to transmit, to the first radio station (10), information about a problem occurring in a radio link in the second cell (20) between the second radio station (20) and the radio terminal (30) while the carrier aggregation of the first cell (10) and the second cell (20) is being performed.
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Patent Agency Ranking
公开(公告)号：US20190028923A1
公开(公告)日：2019-01-24
申请号：US15757432
申请日：2016-09-13
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI
Abstract: A radio terminal (1) receives from a base station (2) a first value (601) of a first radio resource configuration information element. The first value (601) is associated with normal coverage or with a first coverage enhancement level. The radio terminal (1) derives a second value (604) of the first radio resource configuration information element by converting (603) the first value (601) using a value of a conversion factor (602). The second value (604) is associated with a second coverage enhancement level. It is thus, for example, possible to contribute to reduction of data size necessary for the base station to notify the radio terminal of a plurality of radio resource configurations for a plurality of coverage enhancement levels.
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公开(公告)号：US20190028862A1
公开(公告)日：2019-01-24
申请号：US15755611
申请日：2016-06-21
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI
CPC classification number: H04W4/021 , G08G1/09 , G08G1/091 , H04W4/06 , H04W4/44 , H04W4/90 , H04W76/11 , H04W92/18
Abstract: A Road Side Unit (RSU) (120) transmits V2X report information to a control node (140) and transmits location-related information about the RSU (120) to the control node (140). The control node (140) determines, based on the received location-related information about the RSU (120), at least one of: one or more sending nodes; a transmission area; a distribution path; and a communication scheme, to distribute a V2X control message to a plurality of UEs. It is thus, for example, possible to contribute to achievement of a configuration in which, upon receiving V2X report information from an RSU, a server transmits a V2X control message based on the V2X report information to a plurality of vehicles or pedestrians.
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公开(公告)号：US20190028860A1
公开(公告)日：2019-01-24
申请号：US16069777
申请日：2016-12-15
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A radio terminal (1) is configured to transmit data using a first communication architecture type, in response to an occurrence of a request for specific data transmission when the radio terminal (1) has already been configured by a network (3) to use a second communication architecture type. This contributes to, for example, when the radio terminal has already been configured by the network to use the second communication architecture type that involves suspension and resumption of an RRC connection, facilitating effectively performing communication according to the first communication architecture type that involves data transmission over a control plane.
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29.发明申请公开(公告)号：US20180242197A1
公开(公告)日：2018-08-23
申请号：US15554736
申请日：2016-02-12
Applicant: NEC Corporation
Inventor： Takanori IWAI , Hisashi FUTAKI
CPC classification number: H04W28/12 , H04L47/2466 , H04W28/0205 , H04W76/15 , H04W76/20 , H04W76/28
Abstract: An object of the invention is to provide a communication control device capable of reducing the effect on throughput of U-Plane data when the communication amount of C-Plane data increases. A communication control device (30) according to the present invention includes: an information acquisition unit (31) configured to acquire ratio information indicating a ratio between a communication amount of control data and a communication amount of user data from a base station (20) configured to allocate a radio resource for transmitting and receiving the control data and the user data between the base station and a mobile station (10); and a parameter control unit (21) configured to change a parameter associated with the mobile station (10) so as to reduce the control data to be transmitted and received between the mobile station (10) and the base station (20) when the ratio of the communication amount of the control data is larger than a predetermined threshold.
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公开(公告)号：US20180213450A1
公开(公告)日：2018-07-26
申请号：US15747013
申请日：2016-06-21
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
CPC classification number: H04W36/0027 , H04W16/32 , H04W36/0033 , H04W36/08 , H04W72/04 , H04W88/06 , H04W88/10 , H04W92/20
Abstract: A secondary base station (2) is configured to receive an SeNB addition request message from a second master base station (3) while providing a radio terminal (1) with a secondary cell group (SCG) for DC in cooperation with a first master base station. The SeNB addition request message indicates whether each of at least one bearer that has already been configured in the secondary base station (2) for DC with the first master base station (1) is to be kept at the secondary base station (2). It is thus, for example, possible to contribute to performing a procedure for changing a master base station in Dual Connectivity (DC) by using existing inter-base station interface procedures and inter-base station signaling messages.
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