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    RADIO ACCESS NETWORK NODE, RADIO TERMINAL, CORE NETWORK NODE, AND METHOD THEREFOR
    1.
    发明公开
    RADIO ACCESS NETWORK NODE, RADIO TERMINAL, CORE NETWORK NODE, AND METHOD THEREFOR 审中-公开

    公开(公告)号：US20230370928A1

    公开(公告)日：2023-11-16

    申请号：US18225421

    申请日：2023-07-24

    Applicant: NEC CORPORATION

    Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

    IPC: H04W36/14 ,  H04W36/00 ,  H04W92/20

    CPC classification number: H04W36/14 ,  H04W36/0033 ,  H04W36/0038 ,  H04W92/20

    Abstract: In response to receiving from a source RAN node (2), on a direct interface (101), a message requesting a handover of a radio terminal (1) from a first network to a second network, a target RAN node (3) receives at least one of slice information and flow information from a core network (5), and controls communication of the radio terminal (1) based on at least one of the slice information and the flow information. The slice information relates to a network slice in the second network. The flow information relates to at least one session to be established in the second network, serving as a bearer-less network, in order to transfer at least one packet flow of the radio terminal (1). It is thus possible, for example, to provide an Inter-RAT handover procedure involving transfer of handover signaling messages on a direct inter-base-station interface.

    METHODS AND APPARATUSES FOR TRANSMITTING CONTROL-PLANE MESSAGES IN CELLS USING DIFFERENT RADIO ACCESS TECHNOLOGIES
    2.
    发明公开
    METHODS AND APPARATUSES FOR TRANSMITTING CONTROL-PLANE MESSAGES IN CELLS USING DIFFERENT RADIO ACCESS TECHNOLOGIES 审中-公开

    公开(公告)号：US20230328591A1

    公开(公告)日：2023-10-12

    申请号：US18204138

    申请日：2023-05-31

    Applicant: NEC Corporation

    Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

    IPC: H04W28/086 ,  H04W24/10 ,  H04W76/16

    CPC classification number: H04W28/0864 ,  H04W24/10 ,  H04W76/16 ,  H04W88/06

    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).

    FIRST UNIT, SECOND UNIT AND METHOD
    3.
    发明公开
    FIRST UNIT, SECOND UNIT AND METHOD 审中-公开

    公开(公告)号：US20230276288A1

    公开(公告)日：2023-08-31

    申请号：US18195185

    申请日：2023-05-09

    Applicant: NEC Corporation

    Inventor： Toshihiro YOKOYAMA ,  Sadafuku HAYASHI

    IPC: H04W24/10 ,  H04L43/0894 ,  H04W88/10 ,  H04W88/12 ,  H04W76/15 ,  H04L43/0876

    CPC classification number: H04W24/10 ,  H04L43/0894 ,  H04W88/10 ,  H04W88/12 ,  H04W76/15 ,  H04L43/0876 ,  H04W80/08

    Abstract: In order to make it possible to report an amount of data from a secondary node (SN) to a master node (MN) in dual connectivity, there is provided a first unit according to the present disclosure which is a first unit of a central unit of a first base station. The first unit includes a controller and a transceiver. The central unit is configured to host at least PDCP layer in the first base station; and is connected to a distributed unit via a first interface, the distributed unit hosting RLC, MAC and PHY layers in the first base station. The controller is configured to host at least a user plane of the PDCP layer hosted by the central unit; and the transceiver is configured to transmit, to a second unit via a second interface, first information indicative of a volume of data processed by the first unit. The second unit is configured to host at least a control plane of the PDCP layer hosted by the central unit.

    RADIO ACCESS NETWORK NODE, CORE NETWORK NODE, RADIO TERMINAL, AND METHODS THEREFOR
    4.
    发明公开
    RADIO ACCESS NETWORK NODE, CORE NETWORK NODE, RADIO TERMINAL, AND METHODS THEREFOR 审中-公开

    公开(公告)号：US20230148192A1

    公开(公告)日：2023-05-11

    申请号：US18093603

    申请日：2023-01-05

    Applicant: NEC Corporation

    Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

    IPC: H04W28/086 ,  H04W76/15 ,  H04W76/22 ,  H04W28/08

    CPC classification number: H04W28/0815 ,  H04W28/0835 ,  H04W28/0967 ,  H04W76/15 ,  H04W76/22

    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.

    FIRST UNIT, SECOND UNIT AND METHOD
    9.
    发明申请
    FIRST UNIT, SECOND UNIT AND METHOD 有权

    公开(公告)号：US20210377770A1

    公开(公告)日：2021-12-02

    申请号：US17397196

    申请日：2021-08-09

    Applicant: NEC CORPORATION

    Inventor： Toshihiro YOKOYAMA ,  Sadafuku HAYASHI

    IPC: H04W24/10 ,  H04L12/26 ,  H04W88/10 ,  H04W88/12 ,  H04W76/15

    Abstract: In order to make it possible to report an amount of data from a secondary node (SN) to a master node (MN) in dual connectivity, there is provided a first unit according to the present disclosure which is a first unit of a central unit of a first base station. The first unit includes a controller and a transceiver. The central unit is configured to host at least PDCP layer in the first base station; and is connected to a distributed unit via a first interface, the distributed unit hosting RLC, MAC and PHY layers in the first base station. The controller is configured to host at least a user plane of the PDCP layer hosted by the central unit; and the transceiver is configured to transmit, to a second unit via a second interface, first information indicative of a volume of data processed by the first unit. The second unit is configured to host at least a control plane of the PDCP layer hosted by the central unit.

    COMMUNICATION SYSTEM
    10.
    发明申请
    COMMUNICATION SYSTEM 有权

    公开(公告)号：US20210360588A1

    公开(公告)日：2021-11-18

    申请号：US17389964

    申请日：2021-07-30

    Applicant: NEC Corporation

    Inventor： Caroline JACTAT ,  Sadafuku HAYASHI ,  Jonathan LEWIS

    IPC: H04W72/00 ,  H04L12/58 ,  H04L12/18 ,  H04W4/06 ,  H04W76/40

    Abstract: A communication system is described in which an MBMS service is provided by unicast or broadcast/multicast communication in dependence on whether the number of mobile communication devices indicating an interest in receiving the service is below or above a broadcast threshold. An improved procedure for counting the number of mobile communication devices interested in receiving the MBMS service is also disclosed.

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