公开(公告)号：US20210352621A1

公开(公告)日：2021-11-11

申请号：US17273768

申请日：2019-05-31

Applicant: NEC Corporation

Inventor： Sadafuku HAYASHI ,  Hisashi FUTAKI

IPC: H04W72/00 ,  H04W72/04 ,  H04W4/90 ,  H04W12/03

Abstract: In response to receiving a signaling message requesting a broadcast of specific system information from a central unit (1) of a base station, a distributed unit (2) of the base station changes an active downlink (DL) Bandwidth Part (BWP) of a plurality of radio terminals from a first DL BWP that is not configured with a search space (SS) for receiving the specific system information to a second DL BWP that is configured with an SS for receiving the specific system information. In addition, the distributed unit (2) broadcasts the specific system information on the second DL BWP.

公开(公告)号：US20210306848A1

公开(公告)日：2021-09-30

申请号：US17252057

申请日：2019-06-14

Applicant: NEC CORPORATION

Inventor： Yuhua CHEN ,  Sadafuku HAYASHI ,  Hisashi FUTAKI ,  Jagdeep Ahluwalia SINGH ,  Neeraj GUPTA ,  Chadi KHIRALLAH

IPC: H04W12/033 ,  H04W76/18

Abstract: A communication system is disclosed in which a distributed base station apparatus comprises a central unit for control plane signalling (CU-CP), at least one a central unit for user plane signalling (CU-UP), and at least one distributed unit. The CU-CP obtains information indicating whether a security configuration is supported by a CU-UP and selects a security configuration for an item of user equipment (UE) based on the obtained information.

公开(公告)号：US20210274428A1

公开(公告)日：2021-09-02

申请号：US17325885

申请日：2021-05-20

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04W48/08 ,  H04W76/27 ,  H04W36/08 ,  H04W88/02 ,  H04W88/08

Abstract: A base station (1) controls state transitions of a radio terminal (2) among first to third RRC states. In addition, the base station (1) explicitly or implicitly informs the radio terminal (2) about whether a network slice configured in the radio terminal (2) for data communication at least in the first RRC state is available in each cell included in a RAN notification area configured by a RAN (3). It is thus, for example, possible to allow a radio terminal in a first state (e.g., RRC_INACTIVE state) to be easily aware of the availability of network slices in a cell to be reselected or a reselected cell.

公开(公告)号：US20200245289A1

公开(公告)日：2020-07-30

申请号：US16850532

申请日：2020-04-16

Applicant: NEC Corporation

Inventor： Sadafuku HAYASHI

IPC: H04W68/00 ,  H04W68/02 ,  H04W92/20

Abstract: An object of the present invention is to provide a communication system, a base station, a host node, and a communication method in order to address one or more of the above-described problems. A communication system according to the present invention is a communication system including: a base station (10) and a host node (40) that communicates with the base station (10). The base station (10) included in the communication system transmits to the host node (40) setting information indicating whether or not a paging message transmitted from the host node (40) can be transmitted to other base stations, and the host node (40) receives the setting information from the base station (10).

公开(公告)号：US20190357131A1

公开(公告)日：2019-11-21

申请号：US16475798

申请日：2017-12-19

Applicant: NEC CORPORATION

Inventor： Sivapathalingham SIVAVAKEESAR ,  Sadafuku HAYASHI

IPC: H04W48/18 ,  H04W36/00 ,  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.

公开(公告)号：US20190342932A1

公开(公告)日：2019-11-07

申请号：US16474617

申请日：2017-11-21

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04W76/15 ,  H04W28/18

Abstract: A second RAN node (2) associated with a secondary RAT configures a radio bearer of the secondary RAT in accordance with a bearer-level QoS parameter conforming to a QoS framework of a primary RAT. In addition, the second RAN node (2) translates the bearer-level QoS parameter to a flow-level QoS parameter conforming to a QoS framework of the secondary RAT and associates the obtained flow-level QoS parameter with the radio bearer of the secondary RAT.

公开(公告)号：US20190342824A1

公开(公告)日：2019-11-07

申请号：US16474337

申请日：2017-11-21

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04W48/14 ,  H04W36/14 ,  H04W36/00

Abstract: A second RAN node (2) sends to a radio terminal (3), via a first RAN node (1), an indication of available on-demand system information that is available in a cell of the second RAN node (2). It is thus, for example, possible to enabling notifying a UE of an indication about on-demand system information available in a cell served by a secondary gNB of Inter-RAT dual connectivity between E-UTRA and NR, or available in a cell served by a target gNB of Inter-RAT handover from E-UTRA to NR.

公开(公告)号：US20190239184A1

公开(公告)日：2019-08-01

申请号：US16375980

申请日：2019-04-05

Applicant: NEC Corporation

Inventor： Sadafuku HAYASHI

IPC: H04W68/00 ,  H04W68/02

CPC classification number: H04W68/005 ,  H04W68/02 ,  H04W92/20

Abstract: An object of the present invention is to provide a communication system, a base station, a host node, and a communication method in order to address one or more of the above-described problems. A communication system according to the present invention is a communication system including: a base station (10) and a host node (40) that communicates with the base station (10). The base station (10) included in the communication system transmits to the host node (40) setting information indicating whether or not a paging message transmitted from the host node (40) can be transmitted to other base stations, and the host node (40) receives the setting information from the base station (10).

公开(公告)号：US20180359665A1

公开(公告)日：2018-12-13

申请号：US16106145

申请日：2018-08-21

Applicant: NEC Corporation

Inventor： Sadafuku HAYASHI

IPC: H04W36/00 ,  H04W4/24 ,  H04L12/14 ,  H04M15/00 ,  H04W72/04 ,  H04W36/02 ,  H04W88/02 ,  H04W88/08 ,  H04W92/20

Abstract: A mobile communication system which can transfer information on the number of packets counted up until then by a base station of a mobile source, to a base station of a mobile target, even when a terminal performs a handover. UE moves to a Target eNode B, but a Source eNode B decides to perform a handover, and the Source eNode B includes information on the number of packets counted up until then in a Handover Request message to the Target eNode B, so as to notify the Target eNode B. After receiving a Handover Confirm message from the UE, the Target eNode B includes information on the number of packets received from the Source eNode B in a Handover Complete message transmitted to a CN Node, so as to notify the CN Node.

公开(公告)号：US20180352594A1

公开(公告)日：2018-12-06

申请号：US15775537

申请日：2016-12-08

Applicant: NEC CORPORATION

Inventor： Takanori IWAI ,  Daisuke MIZUKAMI ,  Hisashi FUTAKI ,  Sadafuku HAYASHI ,  Hajime ZEMBUTSU ,  Yoshinori WATANABE ,  Toshiyuki TAMURA

IPC: H04W76/12 ,  H04L12/911 ,  H04W8/28 ,  H04W76/11

Abstract: A RAN node (2) receives, from a core network node (6, 7, 8), a first identifier that is used by a service, an application, or an edge server (5) to identify a radio terminal (1) connected to the RAN node (2), and associates the first identifier with a second identifier that is used by the RAN node (2) to identify the radio terminal (1). Further, the RAN node (2) communicates with the edge server (5) using the first identifier. It is thus, for example, possible to allow an MEC server (or an MEC application hosted on the MEC server) and a radio access network (RAN) node to directly exchange therebetween a control message regarding a specific radio terminal.