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公开(公告)号：US20180115921A1
公开(公告)日：2018-04-26
申请号：US15500218
申请日：2015-07-21
Applicant: NEC Corporation
Inventor： Yuhua CHEN , Sadafuku HAYASHI
CPC classification number: H04W28/0257 , H04L47/41 , H04W28/0236 , H04W28/0278 , H04W28/08 , H04W28/12 , H04W28/22 , H04W76/15 , H04W84/045 , H04W92/20
Abstract: A communication system is disclosed, in which a mobile telephone has a control-plane connection to a first base station and communicates user data using at least one communication bearer provided via a second base station. The base stations are configured to exchange information relating to the data rate required for the mobile telephone via the second base station. The first base station derives, based on the exchanged information, an aggregated maximum bit rate (AMBR) parameter specific to the second base station and provides the derived AMBR parameter to the second base station for use in data rate enforcement for the mobile telephone's communications via the second base station.
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公开(公告)号：US20250089082A1
公开(公告)日：2025-03-13
申请号：US18959788
申请日：2024-11-26
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
IPC: H04W72/542 , H04W24/10 , H04W72/044 , H04W72/23
Abstract: When a secondary cell of carrier aggregation has been activated, a radio terminal (2) communicates with a radio access network (RAN) node (1) in an active downlink (DL) bandwidth part (BWP) selected from among a plurality of DL BWPs for the secondary cell. In addition, when the secondary cell is in a dormant state, the radio terminal (2) transmits to the RAN node (1), via a primary cell or another activated serving cell of the carrier aggregation, a channel 10 state information report for a target DL BWP selected from among the plurality of DL BWPs. It is thus, for example, possible to allow the radio terminal to perform channel a state information measurement on a dormant SCell that has been configured with a plurality of BWPs.
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63.发明公开公开(公告)号：US20240214918A1
公开(公告)日：2024-06-27
申请号：US18602501
申请日：2024-03-12
Applicant: NEC Corporation
Inventor： Sivapathalingham SIVAVAKEESAR , Sadafuku HAYASHI
CPC classification number: H04W48/18 , H04W36/0069 , H04W36/00835 , H04W60/04
Abstract: A communication system is disclosed in which a number of procedures may be performed between user equipment, a base station, and/or the core network in the context of network slicing. The procedures support, for example efficient configuration of paging areas, roaming, access restriction, mobility, setting up of dual mode connectivity, connection re-establishment, efficient paging and slice selection.
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64.发明公开公开(公告)号：US20240206002A1
公开(公告)日：2024-06-20
申请号：US18285717
申请日：2022-04-12
Applicant: NEC Corporation
Inventor： Chadi KHIRALLAH , Yuhua CHEN , Sadafuku HAYASHI
Abstract: The present invention provides methods and associated apparatus that address or at least alleviate the issues of a user equipment (UE) context when the UE moves from one geographical area to another geographical area. A communication system (1) is disclosed that includes a non-terrestrial network portion comprising a plurality of cells each cell serving at least one coverage area. A UE (3) has a Radio Resource Control (RRC) connection in a first coverage area. When the UE (3) detects, based on location information, that it has moved to a different coverage area it releases the RRC connection based on the location of the UE (3).
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公开(公告)号：US20230363026A1
公开(公告)日：2023-11-09
申请号：US17629845
申请日：2021-05-24
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
CPC classification number: H04W76/15 , H04W72/27 , H04W76/34 , H04W88/085
Abstract: A master node (1) requests a conditional PSCell addition (CPA), via an SN ADDITION REQUEST message (301), to a candidate secondary node (2). The master node (1) also requests the candidate secondary node (2) to configure an SN terminated MCG bearer via the SN ADDITION REQUEST message (301). This can, for example, contribute to mitigating a communication continuity problem caused by a Conditional PSCell Addition (CPA) failure.
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Patent Agency Ranking
公开(公告)号：US20220264415A1
公开(公告)日：2022-08-18
申请号：US17626848
申请日：2021-04-07
Applicant: NEC Corporation
Inventor： Chadi KHIRALLAH , Jagdeep Ahluwalia SINGH , Sadafuku HAYASHI
Abstract: Methods and apparatus are disclosed for controlling whether a user equipment (UE) is allowed to access a cell of a closed access group (CAG) when the CAG is selected manually by a user of the UE.
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公开(公告)号：US20220256368A1
公开(公告)日：2022-08-11
申请号：US17628326
申请日：2020-06-10
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A master node (MN) (1) controls the MN (1) to enable, for a radio terminal (3), dual connectivity using a Master Cell Group (MCG) provided by the MN (1) and a Secondary Cell Group (SCG) provided by a secondary node (SN) (2). The MN (1) sends an indication regarding an MCG failure to the SN (2). The MN (1) transmits an RRC message related to recovery of the MCG failure to the radio terminal (3), via an SCG part of a split signalling radio bearer between the MN (1) and the radio terminal (3). This, for example, allows the SN to learn of an occurrence of the MCG failure.
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公开(公告)号：US20210314817A1
公开(公告)日：2021-10-07
申请号：US17353962
申请日：2021-06-22
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A master RAN node (1) sends, to a control plane function (5) in a core network (4), a modification request for modification of a first PDU session already established between a radio terminal (3) and a user plane function (6) in the core network (4). The modification request implicitly or explicitly indicates that PDU session split is needed for the first PDU session. The modification request causes the control plane function (5) to control the user plane function (6) to move a specific one or more QoS flows of a plurality of QoS flows associated with the first PDU session from a first tunnel between the user plane function (6) and the master RAN node (1) to a second tunnel between the user plane function (6) and a secondary RAN node (2). This contributes, for example, to implementing PDU session split in a radio communication network.
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公开(公告)号：US20210212131A1
公开(公告)日：2021-07-08
申请号：US15779208
申请日：2016-09-13
Applicant: NEC CORPORATION
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A radio terminal (1) is configured to transmit, to a radio station (2), a Radio Resource Control (RRC) connection setup complete message including a UE assistance information element indicating which of a plurality of communication architecture types for data packet transmission relating to Cellular Internet of Things (CIoT) the radio terminal desires to use, the radio terminal supports, or the radio terminal is configured with. As a result, with regard to a specific communication procedure involving determination of communication architecture used for a radio terminal serving as a CIoT device, it is for example possible to contribute to enhancement of efficiency of the communication procedure, reduction of signaling messages, or appropriate CN selection.
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公开(公告)号：US20210168654A1
公开(公告)日：2021-06-03
申请号：US17176770
申请日：2021-02-16
Applicant: NEC Corporation
Inventor： Hisashi FUTAKI , Sadafuku HAYASHI
Abstract: A radio station (2) transmits or receives, to or from a radio terminal (1) in a second cell (23, 24), a CP message containing a NAS message or an RRC message or both, when a predetermined condition is satisfied. The second cell (23, 24) uses a RAT different from that of the first cell, and is used in addition and subordinate to the first cell. The predetermined condition relates to at least one of: (a) a content or type of the CP message; (b) a type of a signalling radio bearer used to transmit the CP message; (c) a transmission cause of the CP message; and (d) a type of a core network associated with the NAS message. It is thus, for example, possible to contributing to efficient transmission of control plane (CP) messages in a radio architecture that provides interworking of two different Radio Access Technologies (RATs).
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