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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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.


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.


Patent
NEC Corp | Date: 2017-04-05

In order for more effectively supporting a Dedicated Core Network, there is provided a network system including a first node (30) that establishes secure connection with a UE (10) initially attempting to attach to a network, through a radio base station (20), and a second node (40) to which the UE (10) is redirected from the first node (30) through the radio base station (20). Upon the redirection, the first node (30) sends information on the first node (30) itself to the second node (40) through the radio base station (20). The second node (40) uses the information to retrieve security context necessary for establishing the connection with the UE (10) from the first node (30).


In a wireless communications system including a first transmission point and a second transmission point, a wireless communications method implemented in the first transmission point supporting coordinated multi-point transmission and reception (CoMP) is disclosed. The wireless communications method comprises transmitting to the second transmission point one or more CoMP hypothesis sets, and transmitting to the second transmission point a benefit metric corresponding to each CoMP hypothesis set, wherein the benefit metric can be a negative value. Other methods, systems, and apparatuses also are disclosed.


Patent
NEC Corp | Date: 2017-01-18

A UE (10) provides information on potential SeNB(s). The information is forwarded from an MeNB (20_1) to an MeNB (20_2) such that the MeNB (20_2) can determine, before the handover happens, whether the MeNB (20_2) will configure a new SeNB (SeNB) and which SeNB the MeNB (20_2) will configure. In one of options, the MeNB (20_1) derives a key S-KeNB for communication protection between the UE (10) and the SeNB (30_1), and send the S-KeNB to the MeNB (20_2). In another option, the MeNB (20_2) derives the S-KeNB from a key KeNB* received from the MeNB (20_1). The MeNB (20_2) sends the S-KeNB to the SeNB (30_1). Moreover, there are also provided several variations to perform SeNB Release, SeNB Addition, Bearer Modification and the like, in which the order and/or timing thereof can be different during the handover procedure.


Patent
NEC Corp | Date: 2017-01-11

There is provided a communication device (4) for providing access to a service via an access point (11) in a cellular communication system (1). The communication device (4) includes an application (15) for accessing the service via said point (11). The communication device (4) receives from the application (15) a service identifier for the service and obtains an identifier of an access point (11) via which said service can be accessed by mapping the service identifier to the identifier of an access point (11).


The exemplary embodiments enables flexible audio services to be provided in a radio communication system in which a base station is shared by a plurality of communication providers. A radio communication system includes: a first user equipment configured to store information for identifying a first communication operator for a first communication; a second user equipment configured to store information for identifying a second communication operator for a second communication; and a base station. The base station is configured to execute the first communication and the second communication, measure a radio resource used in the base station, compare, when the radio resource exceeds a predetermined threshold value, a control level of the base station with at least one of a control level of the first communication or a control level of the second communication. The base station controls, based on a result of the comparison, an audio encoding rate related to at least one of the first communication or the second communication.


In power supply/demand adjustment processing for a DR (Demand Response) system, requests for the power supply/demand adjustment processing can be submitted to customers who maintain power supply/demand adjustment devices that can accommodate the power supply/demand adjustment processing. The control device (A) of the present invention is provided with: an acquisition unit (A1) that acquires processing information indicating power supply/demand adjustment processing that can be accommodated by an adjustment unit that manages, for each customer, adjustment amounts for one or more power supply/demand adjustment devices used in power adjustment of power supply/demand adjustment processing; and a reporting unit (A2) that, on the basis of information indicating characteristics relating to the power supply/demand adjustment processing and processing information, reports the actuation of power supply/demand adjustment processing to customers that are the object of the power supply/demand adjustment processing.


The present invention provides a monitoring device, etc., with which, even for a system in which a plurality of objects to be monitored are complicatedly associated, it is possible to have a high capability of detecting a state pertaining to the system and to reduce erroneous detection. A monitoring device 1 is provided with a first model generation unit 2 for dividing second time-series information, among first time-series information pertaining to an object to be monitored, that is correlated to each item, and generating a model pertaining to the divided time-series information, and a determination unit 3 for finding whether correlation is maintained or not by applying third time-series information to the model, and making a determination pertaining to each item on the basis of the result of the finding.

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