Nec Corporation

Nippon Steel Corporation

Mitsubishi Rayon Company, Limited

Nippon Steel Sumitomo Metal Corporation

Dainippon Ink and Chemicals, Incorporated

Nec C Orporation

Yoshio Ueda

Hisashi Futaki

Toshiyuki Tamura

Sadafuku Hayashi

Tomu Tamura

Atsushi Nakata

Koichi Mochizuki

Masato Shindo

Tomohiro Watanabe

Hideki Kozuka

Vivek Jha

Masami Ikeda

Masaki Yamano

Hiromichi Aoki

Noboru Hasegawa

Kohei Okamoto

Hideumi Hosobe

Shozo Shimizu

Seiji Sugimoto

Toshinori Kawai

Yoshihiro Shimoshimbara

Toshinobu Shiba

Yasunari Kurokawa

Yukio Harata

Kunio Somei

A first base station () is configured to notify a second base station () of frequency accuracy information indicating frequency accuracy of the first base station () in a wireless manner or via a backhaul.

Base station, communication system, communication method, and non-transitory computer-readable medium

In order to make it possible to provide a good communication service even when unlicensed spectrum is used, a communication apparatus according to an example aspect of the present disclosure includes an information obtaining unit configured to obtain first control information indicating communication service quality for unlicensed spectrum, and a communication processing unit configured to transmit the first control information to a communication node which communicates in a radio access network.

Communication apparatus, base station, terminal apparatus, method, program, and a non-transitory computer readable recording medium

There are provided an ultrasonic waveform data generation unit () that generates ultrasonic waveform data representing amplitudes of reflected ultrasonic beams received by a reception unit () in time series for each of ultrasonic elements () forming reception ultrasonic elements (), an ultrasonic waveform data processing unit () that uses a plurality of origin time adjustment patterns, in which a plurality of relative positional relationships between a phased array probe () and a welded portion () are set, and performs processing to synthesize pieces of the ultrasonic waveform data each having the adjusted origin time to generate synthesized ultrasonic waveform data according to each of the origin time adjustment patterns, and a defect evaluation unit () that evaluates whether or not a defect () is present in the welded portion () based on the synthesized ultrasonic waveform data.

Defect detection device, defect detection method, and program

To acquire, by a core network node, information necessary for control of a fixed broadband access network in more cases. An apparatus according to the present disclosure includes a communication processing unit configured to transmit, to a core network node, a first message when a wireless communication apparatus that communicates with a terminal apparatus communicating with a base station is changed from a first wireless communication apparatus to a second wireless communication apparatus, the first message including address information of the second wireless communication apparatus and transport identification information of the second wireless communication apparatus.

Apparatus relating to control of fixed broadband access network

A base station includes a storage unit stores a neighbour relation table and a processing unit. The processing unit receives service information of a neighbour cell to its own cell, the service information being transmitted by another base station forming the neighbour cell to the own cell, the service information including at least one of an information element indicating whether the another base station has a function of a wireless LAN (Local Area Network) base station and an information element indicating whether the neighbour cell is a cell for dynamically adding a communication capacity. The processing unit registers the service information of the neighbour cell with the neighbour relation table.

Method and base station for cell splitting in a wireless communication network

A base station apparatus () is configured to send a first information element to an inter-base-station gateway (). The first information element explicitly or implicitly indicates whether a relay operation is necessary. The relay operation is an operation in which the inter-base-station gateway () relays a data packet destined for or sent from a radio terminal between the base station apparatus () and another base station (). It is thus, for example, possible to contribute to enabling a base station or an inter-base-station gateway to select whether a relay operation by the inter-base-station gateway should be performed at the time of an inter-base-station handover.

Base station apparatus and inter-base-station gateway apparatus

A method of handover control, a relay apparatus, and a method for selecting a target cell are provided that make it possible to identify a target cell in a hand-in phase even in a network topology in which relay apparatuses are connected in multiple stages. In a radio communication system in which a base station controller () and a first relay apparatus () are connected to a communication network, wherein the base station controller has under its control at least one first base station () connected thereto, and the first relay apparatus has under its control at least a second relay apparatus () connected thereto, wherein the second relay apparatus has under its control at least one second base station (-) connected thereto, the first relay apparatus acquires cell information of a cell controlled by the second base station under the control of the second relay apparatus, and in a hand-in phase for handover from the first base station (), to which a radio station () is wirelessly connected, to the second base station (), the first relay apparatus identifies a target cell of the handover by using the cell information.

Method of handover control, relay apparatus, and method for selecting target cell in radio communication system

A wireless base station includes: a communication unitconfigured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unitconfigured to acquire load information related to a load of a network including a wireless base station forming the cell; and a control unit. The control unitreceives information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit, determines a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, and notifies the signal determined to be measured to the mobile station via the communication unit.

Wireless base station, mobile station, wireless communication system, control method for wireless base station, and recording medium

A mobile communication system includes a control device and a base station device. Data communication between the control device and the base station device is conducted using a fixed-length data size and a variable-length data size. The control device transmits information indicating whether a data size of the data communication has a fixed length or a variable length. The base station device receives the information from the control device.

Mobile communication system, control device, base station device, system control method and device control method

In the case where a wireless terminal conducts a handover from a first device to a second device, a communication device of this exemplary embodiment performs communication with the second device and a core network node, in order to notify an appropriate device of information regarding the transfer path of data. The communication device receives control information from the core network node upon the handover. The control information is information regarding the transfer path of data to be transferred from the first device to the second device.

Communication device, core network node, mobile communication system, communication method, and storage medium

A mobile communication system includes a first Home Node B (HNB); a second HNB; and a HNB gateway (HNB-GW) that is connected to a core network, wherein the first HNB is configured to communicate with a user equipment (UE) before a relocation of intra HNB-GW in which the UE is relocated from the first HNB to the second HNB, wherein the second HNB is configured to communicate with a user equipment (UE) after the relocation and send Iu-UP Initialization comprising an RFCI information to the HNB-GW during the relocation, and wherein the HNB-GW is configured to receive the Iu-UP Initialization.

Mobile communication system, base station, higher-order apparatus, gateway apparatus, communication method, and program

A radio communication system, a radio station, a network operation management apparatus, and a network optimization method are provided that can optimize a performance of the entire system even when network optimization is performed individually. In the radio communication system including multiple radio stations () and network operation management apparatuses managing the radio stations, network optimization is autonomously performed. A first radio station () notifies first optimization information regarding network optimization in a cell () of the first radio station to at least one of another second radio station () that is different from the first radio station and a network apparatus that manages the second radio station ().

Radio communication system, radio station, network operation management apparatus, and network optimization method

This mobile communication system has a portable terminal, a base station that wirelessly communicates with the portable terminal, a gateway device that connects the base station to a core network, and a core network device that is installed in the core network and that performs mobility management of the portable terminal. The core network device sends to the gateway device information for determining whether Selected Internet Protocol Traffic Offload (SIPTO) has been activated. The gateway device receives the information from the core network device.

Mobile communication system, gateway device, core network device, and communication method

A wireless communication system includes a first NodeB that forms a cell; and a relay apparatus to which the first NodeB connects and which relays data transmitted and received between the first NodeB and a core network. The first NodeB broadcasts identification information on the relay apparatus to which the first NodeB connects.

Wireless communication system in which NodeB broadcasts identification information on relay apparatus

In order to change control over a user equipment within a femtocell in accordance with a change in camping of the user equipment, a communication system includes a femto base station () that provides a femtocell includes notification destination setting means () for setting, in the femto base station (), a notification destination to be notified of a change in camping of a user equipment () on the femtocell. The femto base station () notifies the set notification destination of the change in camping of the user equipment (), upon detection of the change in camping.

Communication system, information processing device and femto base station therein, method and program for controlling the same, and method of transmitting information to femto base station

Growing community of inventors

Tokyo, Japan

Yoshio Ueda