公开(公告)号：US20200275315A1

公开(公告)日：2020-08-27

申请号：US16063735

申请日：2016-12-14

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

IPC: H04W28/08 ,  H04W76/16 ,  H04W24/10

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：US20200260325A1

公开(公告)日：2020-08-13

申请号：US16636513

申请日：2018-04-11

Applicant: NEC CORPORATION

Inventor： Hisashi FUTAKI ,  Sadafuku HAYASHI

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

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：US20200252834A1

公开(公告)日：2020-08-06

申请号：US16858186

申请日：2020-04-24

Applicant: NEC Corporation

Inventor： Sadafuku HAYASHI

IPC: H04W28/12 ,  H04W16/32 ,  H04W72/04 ,  H04W92/20 ,  H04W88/08 ,  H04W28/02

Abstract: This wireless communication system has a first base station, and a second base station whereby downlink data received from a core network can be transmitted to a terminal via the second base station and the first base station. The second base station transmits, to the first base station, information that makes it possible to identify whether or not flow control can be carried out.

公开(公告)号：US20200037285A1

公开(公告)日：2020-01-30

申请号：US16347074

申请日：2017-10-26

Applicant: NEC Corporation

Inventor： Sivapathalingham SIVAVAKEESAR ,  Robert PATERSON ,  Toshiyuki TAMURA ,  Sadafuku HAYASHI

IPC: H04W68/00 ,  H04W76/27 ,  H04W76/19

Abstract: A communication system is disclosed in which am anchor base station receives, from a core network node, downlink data for a communication device. The base station attempts (e.g. by RAN-based paging) to initiate communication with the communication device, and when the communication device does not respond to the attempt to initiate communication, the base station sends a message to the core network node, the message requesting initiation of a paging procedure for the communication device (e.g. S1-based paging).

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：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：US20190053073A1

公开(公告)日：2019-02-14

申请号：US15555269

申请日：2016-03-22

Applicant: NEC CORPORATION

Inventor： Sadafuku HAYASHI ,  Kengo OKETANI

IPC: H04W16/32 ,  H04W36/02 ,  H04W72/04 ,  H04L1/16 ,  H04W76/12 ,  H04W76/15 ,  H04W76/30 ,  H04W76/27

CPC classification number: H04W16/32 ,  H04L1/1614 ,  H04W36/02 ,  H04W72/04 ,  H04W72/0446 ,  H04W76/12 ,  H04W76/15 ,  H04W76/27 ,  H04W76/30 ,  H04W80/08

Abstract: In a method for transferring packet data remaining in a first SeNB to a second SeNB via an MeNB, use of a communication line is inefficient. A base station in a communication system that includes a master cell base station, a secondary cell base station, a core network, and a terminal device, wherein: the base station has a reception unit for receiving, from the master cell base station, downlink user data received from the core network by the master cell base station, and a transmission unit for transmitting the downlink user data received to the terminal device; the reception unit receives, from the master cell base station, switching information indicating that the base station from which the master cell base station receives downlink user data is to be switched; and the transmission unit transmits remaining data to the secondary base station when the reception unit has received the switching information.

公开(公告)号：US20190045564A1

公开(公告)日：2019-02-07

申请号：US15759596

申请日：2016-09-28

Applicant: NEC CORPORATION

Inventor： Sadafuku HAYASHI

IPC: H04W76/15 ,  H04W76/30 ,  H04W16/32

Abstract: To enable reduction of the occurrence of unnecessary operations in a case with a SCG bearer. An apparatus of the present invention includes: a first communication processing unit configured to communicate with a terminal apparatus over a master cell group (MCG) bearer for dual connectivity of the terminal apparatus; and a second communication processing unit configured to receive, from a secondary base station which communicates with the terminal apparatus over a secondary cell group (SCG) bearer for the dual connectivity, a first message requesting a release of the secondary base station. The second communication processing unit is configured to transmit, to the secondary base station, a second message indicating a rejection of the release.

公开(公告)号：US20180084525A1

公开(公告)日：2018-03-22

申请号：US15563770

申请日：2016-04-01

Applicant: NEC CORPORATION

Inventor： Tomu TAMURA ,  Toshiyuki TAMURA ,  Sadafuku HAYASHI ,  Yoshio UEDA

IPC: H04W68/02

Abstract: A core network node includes: a paging candidate storage unit that holds a candidate(s) of a base station(s) as a paging message transmission destination(s); a base station information storage unit that holds information about a communication function(s) of the candidate(s) of the base station(s); a paging destination selection unit that selects, when a certain mobile station is paged, a paging range from the candidate(s) of the base station(s), based on the communication function(s) of the candidate(s) of the base station(s); and a paging instruction unit that instructs a base station(s) corresponding to the selected range to perform paging.

公开(公告)号：US20170055170A1

公开(公告)日：2017-02-23

申请号：US15336575

申请日：2016-10-27

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Kosei KOBAYASHI ,  Sadafuku HAYASHI

IPC: H04W24/08 ,  H04W24/02 ,  H04W24/04

CPC classification number: H04W24/08 ,  H04W24/02 ,  H04W24/04

Abstract: A radio communication system, a radio station, a network operation management apparatus, and a network healing method are provided that can suppress system performance degradation caused when a failure occurs in a radio base station, a network apparatus, or the like. In a radio communication system which includes multiple radio stations (10, 20) and a network operation management apparatus (30) managing the radio stations and in which network optimization is performed, at least one of a first radio station (10) in which a failure occurs, a second radio station (20) different from the first ration station, and the network operation management apparatus (30) sends alarm information regarding the failure.

Abstract translation: 提供一种无线电通信系统，无线电台，网络操作管理装置和网络修复方法，其可以抑制在无线基站，网络装置等中发生故障时引起的系统性能下降。 在包括多个无线电台（10,20）的无线电通信系统和管理无线电台并执行网络优化的网络操作管理装置（30）中，至少一个第一无线电台（10） 发生与第一配给站不同的第二无线电台（20），并且网络运行管理装置（30）发送关于故障的警报信息。