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Kddi Corporation patents


Recent patent applications related to Kddi Corporation. Kddi Corporation is listed as an Agent/Assignee. Note: Kddi Corporation may have other listings under different names/spellings. We're not affiliated with Kddi Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "K" | Kddi Corporation-related inventors


Transmitting device, receiving device, wireless communication system, wireless communication method, and computer program

A transmitting device includes a data transmitting limit configured to wirelessly transmit a frame including a payload part in which data destined for a plurality of receiving devices is frequency-division multiplexed and a header including a signal field part storing division information about frequency division of the pay load part.. . ... Kddi Corporation

Network monitoring system, network monitoring method, and computer-readable storage medium

A network monitoring system comprising: a prediction unit configured to acquire information needed for detecting an abnormality in a virtual network function provided in a virtualization infrastructure, and predict performance information of a virtual network function that is to be newly provided and monitored; a generation unit configured to generate an abnormality determination rule to serve as a reference for determining whether or not actual performance information of a virtual network function falls within an allowed range that is set based on the predicted performance information; a determination unit configured to perform abnormality determination using the actual performance information of the virtual network function and the abnormality determination rule; and an output unit configured to output an abnormality notification if it is determined by the determination unit that there is an abnormality.. . ... Kddi Corporation

Software distribution processing device, software distribution processing method, and vehicle

A software distribution processing device stores a common key for each ecu and a verification key for an electronic signature of software updating data, verifies an electronic signature of the updating data received from management server equipment by use of the verification key, attaches an electronic signature using the common key for each ecu to the updating data succeeded in verification of the electronic signature, and then transmits to each ecu the updating data attached with the electronic signature using the common key for each ecu.. . ... Kddi Corporation

Base station apparatus, communication apparatus, control method, and computer-readable storage medium

In a wireless communication system that includes a base station apparatus and one or more terminals capable of connecting to the base station apparatus in a first system and connecting to another apparatus in a second system, the base station apparatus: transmits, to the one or more terminals, a notification related to a permitted period for connecting to the another apparatus in the second system; when a terminal included among the one or more terminals has not been capable of communicating with the another apparatus in the second system over a term related to the permitted period, receives information indicating that the terminal has not been capable of performing communication in the second system from the terminal; and controls connection of the terminal in the second system in response to reception of the information from the terminal.. . ... Kddi Corporation

Moving image encoding apparatus, moving image decoding apparatus, moving image encoding method, moving image decoding method, and computer readable storage medium

A moving image encoding apparatus that encodes a moving image and generates encoded data includes an extraction unit configured to extract a brightness change direction for each of blocks acquired by dividing the moving image; and a pixel value control unit configured to control pixel values of a locally decoded image based on the brightness change direction extracted by the extraction unit, for each of the blocks acquired by dividing the moving image.. . ... Kddi Corporation

Base station apparatus, communication apparatus, control method, and computer-readable storage medium

In a wireless communication system that includes a base station apparatus and a terminal capable of connecting to the base station apparatus in a first system and connecting to another apparatus in a second system, the base station apparatus obtains, when a failure has occurred in connection in the second system between the terminal and the another apparatus, information indicating whether the failure is attributed to suspension of communication functions of the terminal in the second system, and controls connection of the terminal in the second system based on the information.. . ... Kddi Corporation

Pulsebeat measurement apparatus, wearable device and pulsebeat measurement method

A pulsebeat measurement apparatus includes: a temperature measurement unit configured to measure, by contacting a human body, a temperature of a contact surface; and a processing unit configured to process a measurement result obtained by the temperature measurement unit. The processing unit includes: an extraction unit configured to extract a change in temperature caused by a pulsation based on the measurement result, and a pulsebeat measurement unit configured to measure a pulsebeat based on an interval between the changes in temperature.. ... Kddi Corporation

Communication apparatus, control method, and computer-readable storage medium

A communication apparatus that communicates with another communication apparatus detects a signal from the other communication apparatus, specifies an amount of a resource used to communicate a predetermined amount of data from the other communication apparatus to the communication apparatus, and transmits, to the other communication apparatus, one predetermined signal corresponding to the specified amount of the resource from a plurality of predetermined signals that are known in the communication apparatus and the other communication apparatus and respectively correspond to different amounts of a resource including at least one of a frequency and time used to communicate the predetermined amount of data.. . ... Kddi Corporation

Communication apparatus, control method, and computer-readable storage medium

A communication apparatus that communicates with another communication apparatus specifies one predetermined signal from a plurality of predetermined signals that are known in the communication apparatus and the other communication apparatus and respectively correspond to different amounts of a resource including at least one of a frequency and time used to communicate a predetermined amount of data and transmits the one signal to the other communication apparatus using the resource in an amount corresponding to the one predetermined signal. The other communication apparatus receives the transmitted one predetermined signal, thereby specifying the amount of the resource corresponding to the one predetermined signal as the amount of the resource to be used for communication between the communication apparatus and the other communication apparatus.. ... Kddi Corporation

Management device, vehicle, management method, and computer program

A management device installed in an automobile includes an initially-delivered key storage unit for storing a plurality of initially-delivered keys corresponding to candidates of initially-delivered keys held by an ecu, a communication part for communicating with the ecu, a verification part for verifying encrypted data from the ecu with the initially-delivered key of the initially-delivered key storage unit, and a wireless communication part for receiving a new initially-delivered key held by a new ecu newly installed in the automobile from management server equipment through a wireless communication network. The initially-delivered key storage unit stores the new initially-delivered key received with the wireless communication part.. ... Kddi Corporation

Evaluation estimation apparatus capable of estimating evaluation based on period shift correlation, method, and computer-readable storage medium

An evaluation estimation apparatus includes: a document totaling unit configured to, for each predetermined unit period, associate, with the predetermined unit period, document information concerning a document which is generated during the predetermined unit period and related to the evaluation target; and an evaluation estimation unit configured to use a period shift amount determined based on a degree of correlation between the document information whose associated unit period has been shifted by each of a plurality of shift amounts and the evaluation information acquired for each unit period to input document information of a document associated with a unit period that corresponds to an estimation target period when shifted by the determined period shift amount, and output an evaluation value of the evaluation target during the estimation target period.. . ... Kddi Corporation

Data processing method, and data processing apparatus

A data processing method, includes: mapping each of a plurality of data, for which classes the data belong to are known, to one point on an n-dimensional feature space using at least two feature amounts; dividing a set of points corresponding to the plurality of data mapped on the feature space into a plurality of n-dimensional simplexes having each point as an apex; classifying a set of points that constitute a hyperplane of each simplex obtained by the division into a subset including points that belong to the same class as elements; and reducing the elements of the subsets for each of the classified subsets. The dividing includes dividing the set of points into the plurality of simplexes so a hypersphere circumscribed on each simplex does not include a point that constitutes another simplex.. ... Kddi Corporation

Coding device and decoding device

An encoding device includes means for determining a block division type and an intra prediction mode, means for applying non-square intra prediction to obtain a predictive value when the determined block is non-square, means for obtaining a prediction residual which is the difference between the predictive value and a corresponding input image to be encoded, means for rearranging prediction residuals obtained when the determined block is non-square into a square format, means for applying orthogonal transformation to the prediction residuals rearranged into the square format to obtain a transform coefficient, means for quantizing the transform coefficients to obtain level values, means for encoding the level values, the block division type, and the intra prediction mode, means for inversely quantizing and inversely transforming the level values to obtain reconstructed prediction residuals, and means for rearranging a block of the reconstructed prediction residuals into a non-square format.. . ... Kddi Corporation

Wireless communication device and wireless communication method

A wireless communication device transmits data to multiple wireless terminals at the same timing. The wireless communication device includes a complement calculation part configured to calculate the amount of complement for transmission data for each wireless terminal among multiple wireless terminals on multiple subcarriers distributed and assigned thereto, a complementation part configured to complement transmission data using the amount of complement calculated for each wireless terminal, and a transmitter configured to transmit the complemented transmission data to multiple wireless terminals via multiple subcarriers. ... Kddi Corporation

11/30/17 / #20170346576

Base station antenna apparatus for mobile communication system

The apparatus automatically corrects deformation of directivity in a vertical plane caused by abnormality in transmission paths and receiving paths. The apparatus includes transmission system detection means (13-1 to 13-4) configured to individually detect abnormality occurring in each of the transmission paths, receiving system detection means (23-1 to 23-4) configured to individually detect abnormality occurring in each of the receiving paths, and control means (30, 40) configured, if any abnormal transmission path has been detected by the transmission system detection means (13-1 to 13-4), to correct deformation of directivity of the transmission antenna in a vertical plane caused due to abnormality in the transmission path by changing and setting a phase and an amplitude of the transmission signal passing through a normal transmission path, and if any abnormal receiving path has been detected by the receiving system detection means (23-1 to 23-4), to correct deformation of directivity of the receiving antenna in a vertical plane caused due to abnormality in the receiving path by changing and setting a phase and an amplitude of the receiving signal passing through a normal receiving path.. ... Kddi Corporation

11/23/17 / #20170339598

Control apparatus, communication apparatus, control method, and computer readable storage medium

A control apparatus controls communication when a first communication apparatus configured to perform communication based on scheduling by using a first frequency and a second communication apparatus configured to perform communication by using a second frequency that allows communication without being based on scheduling concurrently communicate with a third communication apparatus. The control apparatus obtains information indicating the load state of the second communication apparatus and decides the distribution of data transmitted to the third communication apparatus with respect to the first communication apparatus and the second communication apparatus based on the information.. ... Kddi Corporation

11/16/17 / #20170332314

Access point, wireless terminal, storage medium, and method utilizing pointer signal to communicate in available channel

A system, a program and a method allow a wireless terminal to discover an objective access point with a comparatively small amount of consumption energy and in a comparatively short waiting time. The access point (ap) includes: an ap wlan communicator communicating using a predetermined available channel of a first frequency band; a pointer signal generator generating a pointer signal including available-channel information in the first frequency band and a network identifier; and an ap pointer signal communicator using a specific channel of a second frequency band to send the pointer signal to the wireless terminal. ... Kddi Corporation

11/09/17 / #20170324558

Management device, key generating device, vehicle, maintenance tool, management system, management method, and computer program

An automobile is equipped with a management device including a communication part for communicating with an ecu mounted on an automobile, an encryption processor for generating an encrypted key by encrypting a key, a key generation part for generating the key, and a key storage unit for storing the key generated by the key generation part. The communication part transmits the encrypted key to the ecu, while the encryption processor encrypts the key generated by the key generation part.. ... Kddi Corporation

08/31/17 / #20170251510

Radio control device, terminal device, and communication method

A base station device (e-utran) assigns a frequency band unsupported by the base station device as a radio resource usable for terminal-to-terminal communication, and transmits resource information for designating the assigned radio resource to a first terminal device and a second terminal device.. . ... Kddi Corporation

08/24/17 / #20170245254

Radio control device, terminal device, and communication method

In a communication system capable of executing terminal-to-terminal communication in which wireless communication is performed directly without an intervention of a base station device between a first terminal device that is in a state in which cellular communication with the base station device can be executed and a second terminal device that is not in the state in which cellular communication with the base station device can be executed, the base station device generates control information necessary for the first terminal device to search for the second terminal device, and transmits the generated control information to the first terminal device.. . ... Kddi Corporation

08/17/17 / #20170238198

Control device, base station, control method, and storage medium

A control device configured to control communication between a terminal and a base station manages, concerning the communication, first information representing a part of a number corresponding to an order of a packet and held by each of the terminal and the base station and second information representing another part of the number corresponding to the order of the packet and transmitted from the terminal to the base station, determines whether the first information matches between the base station and the terminal, and controls the terminal to transmit a signal used to execute reconnection processing for resetting the number of the packet upon determining that the first information does not match between the base station and the terminal.. . ... Kddi Corporation

07/06/17 / #20170195878

Communication network system, transmission node, reception node, and message checking method

In a communication network system connected between a transmission node and a reception node, both the transmission node and the reception node store the same secret information with their secret information storage units. The transmission node includes a counter configured to increase its transmission count value by 1 for transmitting each message, wherein a mac generator generates mac based on secret information, transmission data, and its transmission count value, thus transmitting a message including transmission data and mac. ... Kddi Corporation

06/29/17 / #20170187417

Base station system and communication apparatus

A base station system according to an aspect of the invention includes a baseband unit (bbu) and a radio frequency (rf) unit (rfu) connected to the bbu via a communication line. The rfu (bbu) measures the frequencies of occurrence of sampled values indicated by sampled data that is a digital signal corresponding to a baseband signal to be transmitted to the bbu (rfu), and generates a frequency distribution representing a relationship between the sampled value having occurred and the frequency of occurrence. ... Kddi Corporation

05/04/17 / #20170127080

Video encoding apparatus, video decoding apparatus, video compression and transmission system, video encoding method, video decoding method, and computer readable storage medium

A video encoding apparatus that encodes a video having a plurality of color components includes: a linear prediction unit configured to perform linear prediction of reference pixels of a prediction target color component using reference pixels that are used in intra prediction for a color component other than the prediction target color component among the plurality of color components; and an intra prediction unit configured to perform intra prediction of a prediction target block of the prediction target color component using the reference pixels of the prediction target color component that have been obtained through the linear prediction performed by the linear prediction unit.. . ... Kddi Corporation

03/16/17 / #20170079029

Base station apparatus, control method, and storage medium

In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.. . ... Kddi Corporation

01/19/17 / #20170019936

Terminal device, base station device, and usable architecture determination method

A terminal device is configured to establish a communication link with communication equipment through a base station device such that, upon establishing the communication link, part of the communication link is left for a certain base station while another part of the communication link is established with the terminal device through the other base station device according to a plurality of architectures, wherein the terminal device includes a wireless communication part configured to transmit support architecture information representing an architecture supported by the terminal device among a plurality of architectures to the base station device.. . ... Kddi Corporation








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