Hitachi, Ltd.

Hitachi Communication Technologies, Ltd.

The Furukawa Electric Co., Ltd.

Furukawa Automotive Systems Inc.

Hitachi Advanced Systems Corporation

Other

Kddi Corporation

Mikio Kuwahara

Kenzaburo Fujishima

Katsuhiko Tsunehara

Nobukazu Doi

Tomoaki Ishifuji

Masanori Taira

Hajime Kanzaki

Satoshi Tamaki

Atsushi Ogino

Koichiro Furueda

Takashi Yano

Koji Watanabe

Toshiro Suzuki

Takashi Inoue

Toshiyuki Saito

Koki Uwano

Yuji Ishida

Sumaru Niida

Tsukasa Sasayama

Ken Takei

Masayuki Takase

Yukihiro Kawamura

Seishi Hanaoka

Takashi Tonoike

Saburo Yagi

Toru Okamoto

Ayumu Koide

Yuji Oishi

Koji Meguro

Takashi Mori

Hiroshi Okabe

Rintaro Katayama

Masami Ohnishi

Ryosuke Fujiwara

Takashi Shigematsu

Kenya Kawabata

Kazuyuki Hori

Shigenori Hayase

Akihiko Yoshida

Kenichi Mizugaki

Takaki Uta

Tomonori Yamamoto

Kiyoshi Kawamoto

Yunjian Jia

Daisuke Mashimo

May Takada

Ryo Nakano

Masaya Satou

Takeshi Hyotani

Katsunori Takeda

Hajime Noda

Shinya Kojima

Go Ono

Yasutaka Morinaga

Kingo Miyoshi

Hiroshi Kishida

Ryusuke Terashima

Yoshitaka Imakado

Atsuhiko Sato

Takayuki Hikotani

Izumi Nakajima

Tomonori Nomura

Akihiro Ohnuma

Kentarou Sakamoto

Tatsunori Ohara

Hiromu Kamei

Pinai Linwong

Kenichi Azuma

Makiko Satoh

Naomitsu Ishibashi

Shinnosuke Komamura

Rumiko Nagano

Ichiro Murata

It is provided a network system that transfers data, the network system comprising: a first network; a second network connected with the first network and to which a server is connected; a third network connected with the first network and in which a terminal is accommodated; a terminal identification device, wherein the terminal identification device is configured to hold terminal identification information in which the address information of the gateway device in the first network, an identifier of the terminal, and the connection availability of the terminal to the second network are associated with each other, determine the connection availability of the terminal to the second network based on the terminal identification information, and acquire the address information of the gateway device in the first network and the identifier of the terminal from the gateway device to register or update the terminal identification information.

Network system, communication control device, and communication control method

To determine a communication path satisfying communication requirements depending on an operation of an application, it is provided a management device for selecting a communication path that satisfies communication requirements for an application operating on a terminal, the management device comprising: an event detection module configured to detect, as an event, one of an operation change, an increase, or a decrease of the application which is accompanied by a change in the communication requirements; app information for managing the communication requirements for each operation of the application; communication path information for managing communication quality of each communication path; and a communication control method calculation module configured to determine, by referring to the app information and the communication path information, a communication control method that satisfies the communication requirements for the application from which the event has been detected, and notify a communication control device of the determined communication control method.

Management device, communication control system, and communication control method

It is provided a communication system comprising: at least one IoT terminal; a base station apparatus to which the IoT terminal is to be coupled; an edge server selectively receives user plane packets transmitted and received by the base station apparatus; and a cloud server selectively receives user plane packets transmitted and received by one of the base station apparatus and the edge server, wherein at least one of the IoT terminal, the edge server, or the cloud server has arranged therein a first middleware formed of software, and wherein the first middleware receives an instruction on a policy which is set based on a result of analyzing traffic of packets transported in the communication system; receives by proxy an instruction to transmit packets from an application; adjusts timings to transmit the packets in accordance with the instructed policy; and relays a transmission instruction to a communication module.

Communication system, communication control method, and storage medium

A mobile-side IP address is translated into an intranet-side MAC address, and an IP address for an intranet is acquired. The present invention provides a network system for transferring a packet, including: a first network that controls transfer of data at a first layer; a second network that is connected to the first network and controls transfer of data at a second layer different from the first layer; and a translation device that translates an address between networks, in which the translation device translates the address of the first layer of the first network attached to data transferred from the first network to the second network into the address of the second layer of the second network.

It is provided a communication system comprising: an access system including a base station wirelessly receives information from a terminal, and an edge apparatus; a user data system including a mobile core apparatus configured to receive via the edge apparatus a signal transmitted from the base station; and a monitoring system including a packet analysis apparatus analyzes traffic used by the terminal from the user data copied by the edge apparatus, a wireless quality calculation unit calculates a wireless quality between the base station and the terminal, and a visualization unit visualizes a usage situation of a wireless resource based on calculation using information collected from the packet analysis apparatus, the mobile core apparatus, and the wireless quality calculation module, the visualization unit outputs data for displaying the usage situation of the wireless resource from an arrangement of the terminal, the calculated wireless quality, and the analyzed traffic.

Communication system and communication management method

A communication system includes: a terminal configured to perform a predetermined operation and including a communication device configured to transmit first information relating to the predetermined operation by a first communication method; and a server apparatus configured to receive information transmitted from the terminal. The communication device transmits second information indicating a status of the terminal by a second communication method different from the first communication method, and the server apparatus determines whether the first information is normally received from the terminal and, when determining that the first information is not normally received, performs predetermined processing depending on a communication status of the terminal based on the received second information.

Communication system, communication method, and communication program

To improve line utilization efficiency in short-cycle data collection, it is provided a method of managing communication in a communication system, the communication system including: an aggregation unit configured to receive information through a communication path from a plurality of terminals, which are sources of information transmission; and a reservation unit configured to determine, for each of the plurality of terminals, timing at which the terminal transmits a signal, the method comprising steps of: receiving, by the reservation unit, a relative time specified by a user as a time at which the terminal transmits the information; and determining, by the reservation unit, as scheduling information, an absolute time unique throughout the communication system so that interference with another communication session is avoided when the terminal holds communication at the relative time.

Communication management method, communication system, and storage medium

A terminal manufacturing apparatus includes a pressing device adapted to form a chained terminal including a crimp portion by bending a continuously supplied plate-shaped workpiece into a hollow shape, the crimp portion being crimpable with a conductor part of a coated conductor accommodated therein, a welding device adapted to bring two edge portions of the crimp portion in proximity to each other and join the two edge portions by welding, a conveying/positioning time calculating unit adapted to determine a conveying/positioning time of the welding device on the basis of a machining time required by the pressing device and the welding device, and a conveying/positioning mechanism adapted to position the chained terminal in a welding machining position within the welding device in accordance with the conveying/positioning time.

Terminal manufacturing apparatus and welding apparatus

A crimp terminal has a crimp portion that is formed by bending a plate material into a hollow shape and that has at one end thereof an opening capable of accommodating and crimping a conductor portion of a coated wire. The crimp terminal includes a first weld portion obtained by bringing two edge portions of the crimp portion in close proximity to each other and joining by laser welding, and a second weld portion obtained by forming a lapped portion by overlapping of a transition portion formed at an opposite end of the crimp portion to the opening, and closing the lapped portion by laser welding. A welding trajectory in the second weld portion is constituted by a curve, a plurality of straight lines, or a discontinuously formed line.

Terminal, crimp terminal, wire harness, and method for manufacturing crimp terminal

A transition portion () has a surface () that is formed extending upward. The surface () is a surface formed extending upward so as to face a bottom portion (). Specifically, the transition portion () has a cross-sectional shape in which upper edge portions of side portions () are bent inward. As the surface () approaches a main terminal body () from a sealing portion (), the surface () gradually separates away from the bottom portion () and the edge portions of the surface () gradually open outward and connect to side portions () of the main terminal body (). The surface () is formed so as to be curved upward, in a cross-section, from the end portion of the sealing portion ().

Terminal, wire harness, and wire-harness structure

The present invention is directed to achievement of a data transmission control to cause base stations to cooperate with one another, taking into account efficient use of radio resources. A wireless communication system, which is an aspect of the present invention, includes: a first base station; a second base station connected via a wired network; and a wireless communication terminal that conducts at least one of single data transmission in which a single base station transmits data and cooperative data transmission in which a plurality of base stations cooperate to transmit data. The base stations notify the wireless communication terminal of a condition indicating a case where the cooperative data transmission can be performed. If the communication quality of the propagation path meets the condition, the wireless communication terminal transmits, to the base stations, information that is required for the cooperative data transmission.

Wireless communication system with multiple base stations cooperating to transmit data

A base station broadcasts a message saying that transmittable ranging codes are limited by antenna IDs to limit antennas and the ranging codes to be searched, thereby reducing a processing load of the search. In a cellular radio communication system in which a base station device is connected to plural antennas, and antenna IDs for identifying the antennas are transmitted from the respective antennas, the base station device broadcasts a message saying that a group of ranging codes transmittable by a terminal device is limited by the antenna IDs, the terminal device receives the message, identifies the antenna ID, selects the ranging code from the group of the ranging codes corresponding to the antenna ID, and transmits the selected ranging code.

Radio communication system, radio communication method, base station device and terminal device

Provided is a wireless communication system which includes a wireless communication unit using plural frequency bands and plural antennas. The system changes the transmission power of each antenna, based on the interference of each of the frequency bands from the neighbor base station along the antenna direction. The system estimates the number of antennas necessary for transmission in response to a user requirement, and determines a necessary antenna in accordance with the antenna direction in which the terminal is located, and further changes the transmission power of each antenna.

Wireless base station for controlling antenna transmission power

Necessary transmission power of terminals is secured while suppressing total transmission power in base station, so that FFR technology is realized with high frequency utilization efficiency to thereby realize both of compactness of base station and increase of communication capacity. Frequency resource is divided into frequency for boundary area of cell and frequency for central area of cell. Transmission power per unit frequency is fixed in the frequency for boundary area of cell and is set to be variable in the frequency for central area of cell. Transmission power per unit frequency is adjusted so as to satisfy necessary power of terminals connected to frequency for central area of cell. When it is judged that total transmission power of base station exceeds prescribed value, terminal is moved from central area to boundary area of cell, so that total transmission power is suppressed to be equal to or smaller than standard.

Transmission power adjustment method in wireless communication system and base station

A radio communication system is provided in which, based on a measurement condition and neighbor information specified by a base station to which a mobile terminal is connected, the mobile terminal measures the reception quality of the neighboring base stations included in the neighbor information and, when a transmission request is received from the connected base station, transmits the measurement result to the connected base station. In this radio communication system, the base station transmits neighbor information, which specifies the base stations for which interference measurement is to be performed, and a measurement result transmission request to the mobile terminal at a predetermined time for measuring the interference of neighboring base stations and, in response to it, the mobile terminal transmits the measurement result of the base stations, specified by the base station for measuring the interference, to the base station.

Radio base station, radio communication system and interference notifying method in radio communication system

Growing community of inventors

Yokohama, Japan

Mikio Kuwahara