公开(公告)号：US20190239105A1

公开(公告)日：2019-08-01

申请号：US16376628

申请日：2019-04-05

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI ,  Kosei Kobayashi ,  Hiroaki Aminaka

IPC: H04W24/08 ,  H04W52/02 ,  H04L12/24 ,  H04W64/00

Abstract: A wireless communication system comprises: a setting notifying means for notifying, to a radio terminal, setting information related to at least one of the radio terminal's collection of measurement information and the radio terminal's reporting of the measurement information to a radio network; a status notifying means for notifying, to the radio network, a status related to at least one of the radio terminal's collection of the measurement information and the radio terminal's reporting of the measurement information; and a re-establishing means for receiving the status and determining whether to re-establish the setting information.

公开(公告)号：US20190223147A1

公开(公告)日：2019-07-18

申请号：US16338359

申请日：2017-09-13

Applicant: NEC CORPORATION

Inventor： Yuhua CHEN ,  Sadafuku HAYASHI ,  Hisashi FUTAKI

IPC: H04W68/00 ,  H04W76/28 ,  H04W68/02 ,  H04W8/08 ,  H04W4/029

CPC classification number: H04W68/005 ,  H04W4/029 ,  H04W8/08 ,  H04W68/02 ,  H04W76/28

Abstract: A communication system is disclosed in which an MME receives an indication that a base station of a tracking area supports extended discontinuous reception, eDRX. The MME determines that paging is required for a communication device and that the communication device may be located in a cell of a base station of the tracking area. The MME triggers paging of the communication device in accordance with discontinuous reception, DRX, information that is not specific to eDRX via base stations that support eDRX and triggered paging of the communication device in accordance with eDRX specific information via base stations which support eDRX has been received.

公开(公告)号：US20190150209A1

公开(公告)日：2019-05-16

申请号：US16245061

申请日：2019-01-10

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W76/11 ,  H04W72/12 ,  H04W74/00 ,  H04W52/40 ,  H04W52/14 ,  H04W72/04 ,  H04W52/36 ,  H04W76/27 ,  H04W76/15 ,  H04W52/04

Abstract: A radio communication system includes a radio access network (1) and a radio terminal (2). The radio access network (1) includes a first base station (11) that manages a first cell (110) and a second base station (12) that manages a second cell (120). The radio terminal (2) supports dual connectivity involving a bearer split in which a 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 radio access network (1) is configured to transmit, to the radio terminal (2), first control information that relates to an access stratum and is necessary for the dual connectivity involving the bearer split. It is thus possible to provide, for example, a control procedure or signalling necessary for starting dual connectivity involving a bearer split.

公开(公告)号：US20190058997A1

公开(公告)日：2019-02-21

申请号：US16080392

申请日：2017-05-15

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04W16/02 ,  H04W36/14 ,  H04W36/26 ,  H04W76/27

Abstract: During handover of a radio terminal (1) from a first network to a second network, a target RAN node (3) is operates to: receive, from a core network (5), slice information about a network slice which is included in the second network and to which the radio terminal (1) is to be connected; create, upon receiving the slice information, radio resource configuration information that is to be used by the radio terminal (1) after the handover in the second network; and transmit this radio resource configuration information through the first network to the radio terminal (1). It is possible to contribute to appropriately configuring an AS layer or NAS layer of a target RAT in inter-RAT handover.

公开(公告)号：US20180359681A1

公开(公告)日：2018-12-13

申请号：US15748026

申请日：2016-06-21

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI

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

CPC classification number: H04W48/10 ,  H04W48/16 ,  H04W76/18 ,  H04W84/045 ,  H04W88/02 ,  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：US20180332639A1

公开(公告)日：2018-11-15

申请号：US16041114

申请日：2018-07-20

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI

IPC: H04W76/11 ,  H04W72/04 ,  H04W76/27 ,  H04W74/00 ,  H04W72/12 ,  H04W76/15 ,  H04W52/40 ,  H04W52/36 ,  H04W52/14 ,  H04W52/04 ,  H04W88/10 ,  H04W92/20

CPC classification number: H04W52/36 ,  H04W52/04 ,  H04W52/146 ,  H04W52/40 ,  H04W72/0473 ,  H04W72/1247 ,  H04W72/1284 ,  H04W74/004 ,  H04W74/006 ,  H04W76/11 ,  H04W76/15 ,  H04W76/27 ,  H04W88/10 ,  H04W92/20

Abstract: A radio communication system includes a radio access network (1) and a radio terminal (2). The radio access network (1) includes a first base station (11) that manages a first cell (110) and a second base station (12) that manages a second cell (120). The radio terminal (2) supports dual connectivity involving a bearer split in which a 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 radio access network (1) is configured to transmit, to the radio terminal (2), first control information that relates to an access stratum and is necessary for the dual connectivity involving the bearer split. It is thus possible to provide, for example, a control procedure or signalling necessary for starting dual connectivity involving a bearer split.

公开(公告)号：US20180310356A1

公开(公告)日：2018-10-25

申请号：US16018723

申请日：2018-06-26

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA

IPC: H04W76/15 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W76/15 ,  H04L5/001 ,  H04L5/0032 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0098 ,  H04W72/04 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042

Abstract: A radio terminal (3) has a function of establishing a second radio connection on a second cell (20) operated by a second radio station (2) while a first radio connection on a first cell (10) operated by a first radio station (1) is established. The first radio station (1) sets up a control bearer for transferring at least a control signal regarding the radio terminal (3) between an upper network (4) and the first radio station (1). Further, the first radio station (1) is configured to trigger setup of a second bearer for transferring user data of the radio terminal (3) between the upper network (4) and the second radio station (2). It is thus for example possible to enable a single radio terminal to simultaneously set up bearers on cells of a plurality of radio stations, in order to achieve carrier aggregation of cells operated by different radio stations.

公开(公告)号：US20180279350A1

公开(公告)日：2018-09-27

申请号：US15763162

申请日：2016-09-02

Applicant: NEC Corporation

Inventor： Yi JIANG ,  Hisashi FUTAKI ,  Yasushi MARUTA

IPC: H04W72/12 ,  H04W24/08 ,  H04W52/02

CPC classification number: H04W72/1289 ,  H04W24/08 ,  H04W28/04 ,  H04W52/0225 ,  H04W52/0245 ,  H04W72/04 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264

Abstract: To provide a communication terminal capable of suppressing an increase in power consumption of a UE during multi-subframe scheduling, a communication terminal (10) includes a monitoring unit (11) that monitors control information containing allocation information of at least one subframe where downlink data is transmitted, and a control unit (12) that determines monitoring timing to monitor the control information in accordance with a decoding result of downlink data transmitted using the at least one subframe. The monitoring unit (11) monitors the control information at the determined monitoring timing.

公开(公告)号：US20180227726A1

公开(公告)日：2018-08-09

申请号：US15749663

申请日：2016-06-21

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI

IPC: H04W4/44 ,  H04W4/06 ,  H04W92/10 ,  H04W72/00

CPC classification number: H04W48/12 ,  H04W4/06 ,  H04W4/44 ,  H04W4/46 ,  H04W88/08 ,  H04W92/10

Abstract: A base station (100) transmits configuration information regarding a specific signal to a first radio terminal (120) (Step 201). Further, in response to reception (Step 203) of a specific signal (150) from the first radio terminal (120), the base station (100) transmits a first message carried by the specific signal (150), or a second message derived from the first message, using a broadcast/multicast signal (160) to be received by a plurality of radio terminals (121-123) (Step 205). It is thus, for example, possible to contribute to achievement of a configuration that enables a Road Side Unit (RSU) or a base station to broadcast a message received from one radio terminal to a plurality of other radio terminals.

公开(公告)号：US20180035430A1

公开(公告)日：2018-02-01

申请号：US15552642

申请日：2015-12-24

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI

IPC: H04W72/04 ,  H04L1/00

CPC classification number: H04W72/0453 ,  H04L1/0041 ,  H04L1/0061 ,  H04L5/0044 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/12

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).