公开(公告)号：US20220295314A1

公开(公告)日：2022-09-15

申请号：US17829763

申请日：2022-06-01

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W24/02 ,  H04W28/06 ,  H04W48/08 ,  H04W28/04 ,  H04W74/08

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.

公开(公告)号：US20220256542A1

公开(公告)日：2022-08-11

申请号：US17731477

申请日：2022-04-28

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W72/04 ,  H04W72/12 ,  H04L5/00 ,  H04L1/00

Abstract: A radio station (3) allocates a first plurality of time-frequency resources (430) and a second plurality of time-frequency resources (530) to at least one radio terminal (1, 2). The first plurality of time-frequency resources (430) are used to transmit or receive a first transport block (460) in accordance with a first transmission time interval (TTI). The first TTI is equal to a duration of one subframe (410, 510). The second plurality of time-frequency resources (530) are used to transmit or receive a second transport block (560) in accordance with a second TTI. The second TTI is shorter than the duration of the subframe (410, 510).

公开(公告)号：US20220256380A1

公开(公告)日：2022-08-11

申请号：US17729222

申请日：2022-04-26

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA

IPC: H04W24/08 ,  H04W24/10 ,  H04W76/27 ,  H04L43/06

Abstract: A radio terminal, which has a function to collect and report measurement information designated by a radio network, comprises: means for receiving collection/reporting control information related to the radio terminal's execution of at least one of the collection of measurement information and the reporting of the measurement information to the radio network; and control means for executing, based on the collection/reporting control information, at least one of the collection and the reporting if execution determination information, which is related to at least one of the collection of the measurement information and the reporting of the measurement information to be executed by the local terminal, satisfies a given determination criterion.

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

IPC: H04W24/04 ,  H04W76/19

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.

公开(公告)号：US20220124604A1

公开(公告)日：2022-04-21

申请号：US17564627

申请日：2021-12-29

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W48/10 ,  H04W88/02 ,  H04W48/16 ,  H04W76/18 ,  H04W88/10

Abstract: In one implementation, a NAS layer (202) of a radio terminal (1) obtains, from an AS layer (208) of the radio terminal (1), either or both of: information regarding one or more access barring categories (401) broadcasted by a serving network (2); and the number of the one or more access barring categories. If barring information corresponding to a first access barring category (404) to which an application that triggers a session establishment (403) belongs is not broadcasted by an eNB (2), the NAS layer (202) replaces the first access barring category (404) with a particular access barring category among the one or more access barring categories (401) broadcasted by the serving network (202).

公开(公告)号：US20220030490A1

公开(公告)日：2022-01-27

申请号：US17450355

申请日：2021-10-08

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W36/08 ,  H04W4/70 ,  H04L12/16 ,  H04W4/06 ,  H04W36/00 ,  H04L12/18 ,  H04W36/16 ,  H04W36/04 ,  H04W36/30

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：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

IPC: H04W28/08 ,  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：US20210289405A1

公开(公告)日：2021-09-16

申请号：US16604110

申请日：2018-03-15

Applicant: NEC CORPORATION

Inventor： Tomu TAMURA ,  Yoshikazu KAKURA ,  Hisashi FUTAKI

IPC: H04W36/00 ,  H04W36/08

Abstract: In order to make a slice that is being used by or available for a terminal apparatus, available even at a handover destination or a cell reselection destination, a first base station 100 includes: an obtaining section 141 configured to obtain information related to usage status of a slice provided by the first base station 100; and a transmission processing section 143 configured to transmit the information related to the usage status of the slice.

公开(公告)号：US20210235295A1

公开(公告)日：2021-07-29

申请号：US17229077

申请日：2021-04-13

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA ,  Hiroto SUGAHARA ,  Yoshikazu KAKURA ,  Kazushi MURAOKA

IPC: H04W24/08 ,  H04W76/27 ,  H04B17/309 ,  H04B17/24 ,  H04B17/318 ,  H04B17/382 ,  H04W24/10 ,  H04W16/14 ,  H04W88/02 ,  H04W72/04 ,  H04W88/10 ,  H04L5/00 ,  H04W72/08

Abstract: A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).

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

IPC: H04W76/10 ,  H04W76/27 ,  H04W8/24

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.