Nec Corporation

National Institute of Information and Communications Technology, Incorporated

Nec C Orporation

Takeo Onishi

Takahiro Shiroshima

Eiji Takahashi

Masahiro Kawato

Tadayuki Oono

Kenichi Maruhashi

Fumihide Kojima

Satoko Itaya

Toru Osuga

Daisuke Ohta

Taketoshi Nakajima

Dheeraj Kotagiri

An interference detection system includes a plurality of radio frame acquisition apparatuses and an interference detection apparatus. The interference detection apparatus includes radio frame information reception part, radio frame information storage part, simultaneous frame extraction part, and interference detection part. A radio frame information reception part receives the radio frame information transmitted from the radio frame acquisition apparatus. A radio frame information storage part stores the received radio frame information. A simultaneous frame extraction part extracts first radio frame, and second radio frame demodulated simultaneously or almost simultaneously with first radio frame. An interference detection part determines whether or not first radio frame and second radio frame are interfering with each other on the basis of whether or not there exists(exist) radio frame acquisition apparatus(es) which has(have) demodulated first radio frame and second radio frame simultaneously or almost simultaneously, among a plurality of the radio frame acquisition apparatuses.

Interference detection system, interference detection apparatus, interference detection method, and interference detection program

A communication system according to the present disclosure includes: a required band calculation unit () configured to calculate a required band for a plurality of flows received by a bridge apparatus (), in which, for a flow including burst data among the plurality of flows, the required band calculation unit () calculates the required band for the flow based on a data size of the burst data and an allowable delay of the flow; and a speed ratio calculation unit () configured to calculate a relative ratio of communication speeds of the plurality of flows based on the required band for the plurality of flows. The bridge apparatus () transfers the plurality of flows to a data receiving apparatus () according to the relative ratio of the communication speeds.

Scalable data flows in a communication network

A beam selection system that includes a memory operably connected to processing circuitry. The memory configured to store instructions that request call control information from a device; receive a plurality of user equipment (UE) trajectories and parameters from the device; predict with a first artificial intelligence (AI) engine a plurality of beam patterns within a beam index at a plurality of nodes corresponding with a predicted UE location based on the plurality of UE trajectories and parameters of each UE; transmit the plurality of predicted beam patterns to the plurality of nodes corresponding with a corresponding UE of a plurality of UEs; receive a plurality of UE selected beam patterns from the plurality of nodes; train a second AI engine based the plurality of UE selected beam patterns. The processing circuitry is further configured to update the first AI engine based on learned results from the second AI engine.

User equipment trajectory based beam selection

To provide portable information processing devices which is capable of effectively presenting to a user an action that improves communication quality. The information presenting devices include: a communication quality acquisition means that acquires current communication quality and communication quality when a user takes an action; an action cost calculation means that calculates a cost of the action; an information presentation determining means that determines whether information about the action is to be displayed, based on the current communication quality, the communication quality when the action is taken, and the action cost; an action information generating means that determines the action based on the communication quality when the action is taken and the action cost when the information presentation determining means determines that information about the action is to be displayed; and an information presenting means that displays information about the action determined by the action information generating means.

Information presenting device, information presenting method and recording medium

In order to enable prediction of communication having high quality requirements, this communication device is provided with: a determination unit that determines that a change has occurred in the communication state of communication which is performed, with a device connected to a network, by each of a first terminal and a second terminal communicating with the device; and a derivation unit that, when the change in the second terminal is determined to be being occurring in synchronization with the change in the first terminal, derives a second change time at which the change occurs in the second terminal, on the basis of a first change time at which the change occurs in the first terminal.

Communication device, communication method, and computer readable medium

To provide information processing devices capable of effectively presenting to a user an action that improves communication quality. The information presenting devices includes: a communication quality acquisition means that acquires current communication quality and communication quality when a user takes an action; an action cost calculation means that calculates a cost of the action; a presentation information calculating means that determines the action, based on the current communication quality, the communication quality when the action is taken, and the action cost; a first presenting means that displays predetermined information about a case where the action is taken; and a second presenting means that acquires an instruction from a user after display by the first presenting means, and then also displays additional information about a case where the action is taken, in addition to the predetermined information.

An information notification device which transfers to a communication device a packet transmitted by a terminal to a relay device. The information notification device is provided with: a communication condition providing unit which provides the packet transmitted by the terminal with communication condition information concerning a communication condition between the terminal and the relay device; a data transmission unit which transmits the packet provided with the communication condition information to the communication device; and a supplementation unit which, in the absence of arrival of the packet from the terminal, implements a notification supplementation process for notifying the communication device of the communication condition information.

Information notification device, information notification method, and recording medium having program recorded thereon

A communication load estimation system is provided with a load estimation meansfor estimating a communication load of a wireless base station to be an object of estimation, using at least: a network parameter which is a parameter concerning the number of antennas used for signal transmission of the wireless base station; a first quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least total reception power; and a second quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least a signal to interference noise ratio of a reference signal.

Communication load estimation system, information processing device, method, and program

Provided is, for example, a communication prediction apparatus that can predict, with a higher degree of precision, communication to be performed by an object terminal even when a communication trend changes with changes in the state of the object terminal. A communication prediction apparatusis provided with: a communication monitoring unitthat monitors communication performed between an information processing terminaland an application server; a terminal-state determination unitthat determines a terminal state of the information processing terminal; and a communication prediction unitthat predicts communication to be performed by the information processing terminalin a period from a point in time of interest to a point in time at which a predetermined time has elapsed.

Communication prediction apparatus and communication prediction method, and recording medium storing computer program

In order to reduce wasteful delays occurring when a mobile terminal whose RRC state is a state wherein communication is possible transfers in a temporarily stopped state, a distribution sequence determination device, which determines the distribution sequence for push messages transmitted to each of multiple terminals, determines the distribution sequence on the basis of whether each of the multiple terminals is in a state wherein communication is possible or is in a temporarily stopped state, so as to transmit the push messages to each of the multiple terminals in a distribution sequence in which terminals in a state wherein communication is possible are given priority over terminals in the temporarily stopped state.

Message distribution system, distribution sequence determination device, distribution sequence determination method, and distribution sequence determination program

Message transmission device, which performs processing concerning the transmission of messages to the terminal, executes notification processing for the transmission of a trigger packet to the terminal, said trigger packet indicating that an unsent message exists. Preparatory processing for transmission of the message to the terminal is executed. The order in which the notification processing and the preparatory processing is executed is determined in such a manner that the preparatory processing has been completed before a message acquisition request, which is a response for the trigger packet, is received from the terminal.

Message transmission apparatus, message transmission method, and message transmission program

A terminal, a message distribution system, a message distribution method, and a message distribution program are provided, which are capable of reliably delivering a push message to the terminal from a push server, regardless of a type of network utilized by the terminal, while reducing a processing load of the push server. The terminal includes a network status detection unitwhich detects a status of a network connecting the terminal and a distribution device performing push-type message distribution, and a reception unitwhich determines, based on a result of the detection, whether the terminal and the distribution device are located in a same IP address space, selects, if the terminal and the distribution device are not located in the same IP address space, a first communication method utilizing a pre-established TCP session, selects, if the terminal and the distribution device are located in the same IP address space, a second communication method utilizing a TCP session between the distribution device and the terminal, which is newly established by the distribution device when a message is distributed, and receives a message from the distribution device.

Terminal, message distribution system, message distribution method, and computer-readable medium

Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service. The delivery device is provided with: a communication unit () that transmits, to each terminal connected to the delivery device, a keepalive signal to maintain the connection between the delivery device and each terminal when there is no data to be delivered; and a transmission time determination unit () that divides a period in which the communication unit () transmits a keepalive signal into a plurality of time slots, calculates the expected number of transmissions of the keepalive signal for each time slot on the basis of keepalive signal interval information, which represents the interval of the keepalive signal for each terminal, and, if the expected number of transmissions exceeds a predefined threshold value, transmits, to the communication unit (), the keepalive signal for the portion exceeding the threshold value in the time slot prior to the time slot.

Delivery device, communication system, load balancing method, and load balancing program

When long polling is employed under HTTP, a content-synchronization control device can control each content playback device so that content control is synchronized in multiple content playback devices. When receiving an inquiry from a content playback device, the response control meanswaits transmission of an inquiry response in reply to the inquiry for a certain period of time since reception of the inquiry, and when the waiting state of the transmission of an inquiry response is cancelled, the waiting state of transmission of all the inquiry responses are cancelled. After the reception of the request information, the response control meanscancels the waiting state of the transmission of each inquiry response when a condition that the transmission of each inquiry response to each content playback device is kept waiting is satisfied.

Content synchronization system, content-synchronization control device, and content playback device

A content synchronization system can be provided with which, under HTTP, a content-synchronization control device can control each content playback device so that content control is synchronized in multiple content playback devices. Inquiry reception meansreceives an inquiry for determining presence/absence of playback control command transmitted from each content playback deviceto the content playback device. The waiting time determination meansdetermines a waiting time from when the content playback device of the source of transmission of inquiry receives an inquiry response to when it transmits a subsequent inquiry so that the reception time of the inquiry transmitted from each content playback deviceis at the same time, on the basis of the reference of the reception cycle of the inquiry. The inquiry response transmission meansreturns the inquiry response including the waiting time back to the content playback device. At this occasion, when the playback control command and the start time of the control are determined, the information thereof is also included in the inquiry response.

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Tokyo, Japan

Takeo Onishi