公开(公告)号：US20240251466A1

公开(公告)日：2024-07-25

申请号：US18626624

申请日：2024-04-04

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W76/16 ,  H04W8/22 ,  H04W16/32

CPC classification number: H04W76/16 ,  H04W8/22 ,  H04W16/32

Abstract: A master RAN node (1) associated with a master RAT (1) communicates with a secondary RAN node (2) associated with a secondary RAT and provides a radio terminal (3) with dual connectivity that uses the master RAT and the secondary RAT. In response to receiving, from the radio terminal (3) or a core network (4), terminal capability information indicating that the radio terminal (3) supports the split bearer, the master RAN node (1) uses a PDCP entity, which provides unified PDCP functionalities, for a master cell group split bearer for the radio terminal (3).

公开(公告)号：US20240235756A1

公开(公告)日：2024-07-11

申请号：US18612312

申请日：2024-03-21

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04L5/00 ,  H04L1/06 ,  H04W24/10 ,  H04W36/06 ,  H04W36/16 ,  H04W48/12 ,  H04W72/0453 ,  H04W76/27

CPC classification number: H04L5/0046 ,  H04L1/0693 ,  H04L5/0039 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0092 ,  H04W24/10 ,  H04W36/165 ,  H04W72/0453 ,  H04W76/27 ,  H04W36/06 ,  H04W48/12

Abstract: A radio terminal (12) transmits, to a radio access network (RAN) node (11) in a radio access network (RAN), an indication indicating whether a measurement gap for inter-bandwidth part (BWP) measurement among BWPs included in a plurality of downlink BWPs is required. The downlink BWPs are included within one system bandwidth. Further, the radio terminal (12) receives, from the RAN node (11), a measurement configuration including a measurement gap configuration for one or more BWPs included in the downlink BWPs. It is thus, for example, possible to allow a radio terminal to be configured with a proper measurement gap for inter-BWP measurement within one carrier bandwidth.

公开(公告)号：US20240187198A1

公开(公告)日：2024-06-06

申请号：US18443661

申请日：2024-02-16

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04L5/00 ,  H04B7/06 ,  H04W24/08 ,  H04W24/10 ,  H04W56/00 ,  H04W76/18

CPC classification number: H04L5/0092 ,  H04B7/0626 ,  H04L5/0051 ,  H04W24/08 ,  H04W24/10 ,  H04W56/001 ,  H04W76/18

Abstract: When a downlink bandwidth part (BWP) is switched from a first BWP to a second BWP without a change of a cell defining synchronization signal block (SSB), if a reference signal type for Radio Link Monitoring (RLM) is set to an SSB type, a radio terminal (12) continues to use for RLM measurements a first SSB associated with the first BWP after switching of the downlink BWP to the second BWP. This for example enables the radio terminal to monitor a suitable Reference Signal (RS) for RLM measurements after switching of the DL active BWP.

公开(公告)号：US20240064843A1

公开(公告)日：2024-02-22

申请号：US18374849

申请日：2023-09-29

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA

IPC: H04W76/19 ,  H04L5/00 ,  H04W24/04 ,  H04W48/04 ,  H04B7/24 ,  H04W16/24 ,  H04W4/30

CPC classification number: H04W76/19 ,  H04L5/001 ,  H04W24/04 ,  H04W48/04 ,  H04B7/24 ,  H04W16/24 ,  H04W4/30 ,  H04L2001/0093

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.

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.

公开(公告)号：US20230354379A1

公开(公告)日：2023-11-02

申请号：US18217901

申请日：2023-07-03

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroto SUGAHARA

IPC: H04W72/27 ,  H04L5/00 ,  H04W76/15 ,  H04B7/02 ,  H04W72/542 ,  H04W28/082 ,  H04W28/086 ,  H04W16/32 ,  H04W92/20 ,  H04W24/10 ,  H04W52/36 ,  H04W72/12

CPC classification number: H04W72/27 ,  H04L5/001 ,  H04L5/0091 ,  H04W76/15 ,  H04B7/02 ,  H04W72/542 ,  H04W28/082 ,  H04W28/0861 ,  H04W16/32 ,  H04W92/20 ,  H04W24/10 ,  H04W52/367 ,  H04W72/12 ,  H04W52/146

Abstract: A radio communication system includes a first base station (11) that manages a first cell (110), a second base station (12) that manages a second cell (120), and a radio terminal (2). The radio terminal (2) supports dual connectivity involving a bearer split in which a first network bearer between the radio terminal (2) and a core network (3) is split over the first base station (11) and the second base station (12). The first base station (11) receives, from the second base station (12), bearer split status information about communication of the first network bearer in the second base station (12), and performs control of an access stratum related to the first network bearer. It is thus possible to contribute, for example, to an improvement in control of an access stratum when dual connectivity involving a bearer split is performed.

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).

公开(公告)号：US20230224784A1

公开(公告)日：2023-07-13

申请号：US18122470

申请日：2023-03-16

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W36/16 ,  H04W36/00

CPC classification number: H04W36/165 ,  H04W36/0016 ,  H04W4/70

Abstract: A Machine-to-machine (M2M) terminal (11) comprises a radio communication unit (111) and a controller (112). The radio communication unit (111) is configured to communicate with a base station (13). The controller (112) is configured to change at least one of a cell selection operation, a cell reselection operation, and a handover operation according to whether a specific coverage enhancement processing is required or according to whether the specific coverage enhancement processing is supported by at least one of a cell (13) in which the M2M terminal (11) camps on and a neighbouring cell (14) of the cell (13) which the M2M terminal (11) camps on. It is thus possible to provide an improved technique for allowing the M2M terminal that is supporting a special coverage enhancement processing for M2M terminals to camp on an appropriate cell.

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.

公开(公告)号：US20220311561A1

公开(公告)日：2022-09-29

申请号：US17839591

申请日：2022-06-14

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04L5/00 ,  H04W92/20 ,  H04W88/10 ,  H04W4/00 ,  H04W12/04 ,  H04W12/03 ,  H04W12/041 ,  H04L69/14 ,  H04W76/27 ,  H04W28/02 ,  H04W80/02

Abstract: A radio station (2) transmits configuration information (501) to a radio terminal (1). The configuration information (501) indicates, on a cell-by-cell basis, at least one specific cell on which the radio terminal (1) is allowed to perform at least one of data transmission and data reception on a radio bearer used for uplink transmission or downlink transmission or both via a common Packet Data Convergence Protocol (PDCP) layer (402). As a result, in a radio architecture that provides tight interworking of two different Radio Access Technologies (RATs), it is for example possible to allow an eNB to indicate, to a radio terminal (UE), a specific cell on which the UE should perform uplink transmission.