Tokyo, Japan
Tokyo, Japan

NEC Corporation is a Japanese multinational provider of information technology services and products, with its headquarters in Minato, Tokyo, Japan. NEC provides information technology and network solutions to business enterprises, communications services providers and to government agencies. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as just NEC. Its NEC Semiconductors business unit was one of the worldwide top 20 semiconductor sales leaders before merging it with Renesas Electronics. NEC is a member of the Sumitomo Group. Wikipedia.

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An SeNB (30) informs an MeNB (20) that it can configure bearers for the given UE (10). At this time, the MeNB (20) manages the DRB status, and then sends a key S-KeNB to the SeNB (30). The MeNB (20) also sends a KSI for the S-KeNB to both of the UE (10) and the SeNB (30). After this procedure, the MeNB (20) informs an EPC (MME (40) and S-GW (50)) about the new bearer configured at the SeNB (30), such that the S-GW 50 can start offloading the bearer(s) to the SeNB 30. Prior to the offloading, the EPC network entity (MME (40) or S-GW (50)) performs verification that: 1) whether the request is coming from authenticated source (MeNB); and 2) whether the SeNB (30) is a valid eNB to which the traffic can be offload.


A wireless communications method implemented in a transmission point (TP) used in a wireless communications system is disclosed. The wireless communications method comprises receiving, from another TP, channel state information (CSI) for a user equipment (UE), and receiving, from said another TP, user identification for the user equipment, wherein the signaling of the CSI for the user equipment enables user identification for the user equipment. Other methods, systems, and apparatuses also are disclosed.


Patent
NEC Corp | Date: 2017-04-19

A method and system for data communication in a Multi-user Multiple-Input and Multiple-Output (MU-MIMO) system is provided. The method includes receiving, from a first UE of the plurality of UEs, first and second channel information relating to first and second subsets of antennae; generating first and second sub-precoders according to the first and second channel information; generating a precoder according at least in part to the first and second sub-precoders; and transmitting data to the first UE using the precoder.


A battery control system that communicates by way of a communication network with a plurality of batteries that are connected to an electric power system includes a communication characteristics detection unit that, for each of the plurality of batteries, detects characteristics of communication paths between the batteries and the battery control system within the communication network. The battery control system includes a selection unit which selects, from among the plurality of batteries, each battery that has characteristics of communication paths within a predetermined communication characteristics range, as a regulating battery that is to be used for regulating electric power of the electric power system. The battery control system includes a control unit that supplies operation instructions that instructs the regulating batteries that were selected in the selection unit to perform a charging or discharging operation.


Patent
NEC Corp | Date: 2017-05-17

Embodiments of the present disclosure provide a method of performing transmission between a base station and a terminal device according to a frame structure over an unlicensed spectrum in a wireless network that supports communications over both a licensed spectrum and the unlicensed spectrum. The method comprises signaling information indicating the frame structure and performing transmission between the base station and the terminal device on an unlicensed carrier in the unlicensed spectrum according to the frame structure. There is also provided the corresponding apparatus.


A communication system is disclosed comprising a gateway connecting a source base station and a target base station. The gateway receives a message from the source base station initiating a handover of a mobile device from the source to the target base station. The received message comprises a security context (an NCC-KeNB pair and/or a KeNB*) for securing communications with the mobile device, and for deriving a further key for securing subsequent communications with the mobile device. The gateway generates and sends, to the target base station, a message requesting the target base station to carry out a handover, the message comprising the security context.


Provided are an information sharing device, etc., whereby a time cycle at which information is to be refreshed can be determined in accordance with the frequency that the information is browsed, and whereby said information can be provided without sacrificing real-time characteristics. The information sharing device (1) comprises: a search unit (2) that, when request information (101) is received, browses position information (DB4) and provides the requested position information from among the position information (DB4), to a specified terminal; and a cycle determination unit (3) that, in accordance with the number of times that the position information (DB4) is browsed, determines a second time cycle and provides the determined second time cycle to the specified terminal and other terminals.


A sign of the landslide disaster is easily detected. A model learning unit (120) of an anomaly detection device (100) learns a relational expression between vibration strengths at frequencies based on a time series of frequency characteristics of a vibration strength detected during a learning period by a vibration sensor placed on a monitoring target. The anomaly detection unit (140) learns a relational expression between vibration strengths at frequencies based on a time series of frequency characteristics of a vibration strength detected during a new period by the vibration sensor. Then, the anomaly detection unit (140) determines whether or not there is an anomaly in the monitoring target based on a relational expression related to a new frequency, which is different from the relational expression learned during the learning period.


The antenna device includes an antenna unit (110) mounted so that its direction is adjustable, a motor-driven unit (124, 125) that changes a direction of the antenna unit (110), a camera (130) fixed so that its direction relative to the antenna unit (110) does not change, and a direction adjustment control unit (200) that supplies a drive signal to the motor-driven unit (124, 125) and adjusts the direction of the antenna unit (110). The direction adjustment control unit (200) performs feedback control to return the direction of the antenna unit (110) back to an initial direction based on an image taken by the camera (130). It is thereby possible to maintain the communication quality even when a mechanical vibration occurs in a structure on which an antenna device is mounted.


A technique making it possible to perform flexible virtual machine control is provided. A server according to the present invention is characterized by including: a first means capable of operating a plurality of network functions executed by a network node on a plurality of virtual machines corresponding respectively to the network functions; and a second means capable of forwarding a received signal to a virtual machine that operates a network function corresponding to the received signal, wherein the first means is capable of controlling a resource to allocate to the virtual machine corresponding to the network function, depending on a type of the network function.

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