NIPPON TELEGRAPH AND TELEPHONE CORPORATION patent applications published on October 12th, 2023

Summary of the patent applications from NIPPON TELEGRAPH AND TELEPHONE CORPORATION on October 12th, 2023

NIPPON TELEGRAPH AND TELEPHONE CORPORATION has filed several recent patents related to wireless communication, network management, and device control. These patents cover a range of technologies and methods for improving communication quality, resource allocation, and network configuration.

Summary of Recent Patents (250 words): - One patent describes a base station with multiple radio signal processing units, a carrier sense control unit, and a management unit. The base station can transmit and receive radio signals on different channels and determine if a channel is idle or busy using collective carrier sensing. - Another patent involves a wireless communication method that determines the idle or busy state of a carrier sense band based on the reception signal. If the band is idle, a transmission signal is sent using the transmission channel. - A patent focuses on cooperation between a mobile communication system and a wireless LAN system in a 5G communication area. It involves allocating a communication quality indicator (5QI) to a service data flow and setting a priority condition for the wireless LAN frequency resource based on the 5QI. - Another patent describes a notification control apparatus that generates advice for a user based on their movement event and schedule. The advice is presented to the user at the appropriate time. - A patent involves a management device that can change the allocated resources of a user using a communication line. The device can receive change requests from the manager, server, or user and make the necessary changes to the resources. - Another patent focuses on a control device used in software-defined networking (SDN) to relay packets. The device can transmit requests and responses sequentially or collect multiple requests and responses to transmit together, depending on the processing load. - A patent describes a transfer device that can send packets through multiple physical lines. It includes a measurement unit to assess network performance and a selection unit to choose the best-performing line. - Another patent involves a device that estimates the configuration information of a network within a target device by sending a message and receiving a response from an electronic control unit on the network. - One patent describes a communication system that connects two networks through multiple paths and includes a transfer prevention unit to control the transfer of certain frames between the networks. - Another patent focuses on a base station that uses an omni-directional array antenna and various components to communicate with terminals within its coverage area. The base station determines the time block and antenna gain for communication with each terminal based on their position and time block information.

Summary of Notable Applications:

• A method for determining the idle or busy state of a carrier sense band in wireless communication.
• Cooperation between mobile communication and wireless LAN systems in a 5G communication area.
• A notification control apparatus that generates advice based on a user's movement event and schedule.
• A management device for changing allocated resources in a communication line.
• A control device for relaying packets in software-defined networking.
• A transfer device for sending packets through multiple physical lines.
• A device for estimating network configuration information within a target device.
• A communication system that connects two networks through multiple paths and controls frame transfer.
• A base station with an omni-directional array antenna for communication with terminals.

Patent applications for NIPPON TELEGRAPH AND TELEPHONE CORPORATION on October 12th, 2023

IMPACT ANALYSIS METHOD, FEATURE AMOUNT EXTRACTION METHOD, IMPACT ANALYSIS APPARATUS, AND PROGRAM (18022066)

Main Inventor

Hiroaki ITO

Brief explanation

This abstract describes a system that analyzes information from a sensor installed in a vehicle to determine the type of impact that has occurred. The system acquires an observed signal from the sensor, which is located at a specific position in the vehicle. The analysis unit then uses this signal to determine the type of impact that has occurred, such as a collision with an obstacle, driving over a curb, collision with a flying object, rubbing against an object, or being rubbed by an object. The output unit then provides the time and type of impact as a result of the analysis.

Abstract

Information regarding an impact occurring in a vehicle is analyzed from an observed signal by a sensor installed in the vehicle. An acquisition unit () acquires an observed signal by a sensor (S) installed at a predetermined position of the vehicle. The analysis unit () analyzes the type of impact at each time from the observed signal with respect to the impact occurring on the vehicle at a position different from the position at which the sensor (S) is installed in the vehicle. The type of impact includes at least one type of impact among impact from collision of an obstacle with the vehicle, impact from the vehicle driving over a curb, impact from collision of a flying object with the vehicle, impact from the vehicle rubbing against an object other than the vehicle, and impact from an object other than the vehicle rubbing against the vehicle. An output unit () outputs a result obtained by analyzing a time at which the impact occurs and the type of impact.

SENSOR (18041514)

Main Inventor

Katsuhiko Nishiguchi

Brief explanation

The abstract describes a new type of sensor that is capable of identifying and detecting substances. The sensor consists of several layers, including a first conductor layer made of a specific type of semiconductor that generates an electromagnetic wave. This is followed by a non-conductor layer, a second conductor layer, and a third electrode. On the first surface of the first conductor layer, there is a first electrode on one part and a second electrode on the other part. This sensor design allows for the accurate identification and detection of substances.

Abstract

A sensor of the present invention includes, in order, a first conductor layer which is made of a direct transition type semiconductor and generates an electromagnetic wave; a non-conductor layer; a second conductor layer; and a third electrode, in which a first electrode is provided on a part of a first surface of the first conductor layer opposite to the non-conductor layer side, and a second electrode is provided on the other part of the first surface. Thus, the present invention can provide a sensor which identifies and detects a substance.

LONG PERIOD FIBER GRATING AND OPTICAL TRANSMISSION SYSTEM (18024559)

Main Inventor

Ryota IMADA

Brief explanation

The abstract describes a Long-Period Fiber Grating (LPFG) and an optical transmission system. The LPFG is designed to have a mode conversion amount that is independent of the polarization state and electric field distribution. The LPFG consists of two rows of cavities arranged periodically in the core region of a few-mode fiber. These cavity rows are positioned away from the central axis of the core region and parallel to it. Each cavity row is located at a different position along the length of the few-mode fiber, and the two rows are shifted by 90 degrees on a cross-section of the core region. The center of the cross-section serves as the origin.

Abstract

Provided are an LPFG and an optical transmission system in which a mode conversion amount does not depend on a polarization state and an electric field distribution. The LPFG according to the present invention includes cavity rows (- and -) of cavities  periodically arranged in a core region  of the few-mode fiber  at a position away from a central axis z of the core region  in parallel with the central axis z. Each of the cavity rows (- and -) is located at a different position in a longitudinal direction of the few-mode fiber  (where the position in a z direction is different), and the cavity rows (- and -) are located at positions shifted by 90° on a cross section of the core region  with the center of the cross section of the core region  (the intersection of an x-axis and a y-axis) as an origin.

OPTICAL SWITCH (18018705)

Main Inventor

Chisato FUKAI

Brief explanation

The present disclosure describes an optical switch that is designed to have low power consumption and stable optical characteristics. It achieves this by using a simple mechanism that does not require complicated assembly processes. The optical switch includes an optical coupling portion, which consists of a multi-core optical fiber with a central core and multiple outer cores arranged in a circular pattern around the central core. A mirror is placed in front of the end face of the multi-core optical fiber, allowing it to couple one of the outer cores with the central core to create an optical path. The optical switch also includes a cylindrical member with an end face where the mirror is fixed. A rotation mechanism is used to rotate either the multi-core optical fiber or the cylindrical member in the axial direction of the multi-core optical fiber, enabling the switching of the optical path in the optical coupling portion.

Abstract

The present disclosure aims to provide an optical switch that has low power consumption, and can achieve stable optical characteristics to cope with external factors with a mechanism that does not require any complicated assembly process. An optical switch according to the present disclosure characteristically includes: an optical coupling portion including: a multi-core optical fiber that has a central core at the center of an optical fiber and a plurality of outer cores on the circumference of the identical circle centering around the optical fiber in a fiber cross-section; a mirror that is disposed in front of an end face of the multi-core optical fiber, and couples one of the outer cores with the central core to form one optical path; and a cylindrical member that has an end face to which the mirror is fixed; and a rotation mechanism that rotates the multi-core optical fiber or the cylindrical member in an axial direction of the multi-core optical fiber, and switches the optical path in the optical coupling portion.

BRANCH RATIO MEASURING DEVICE, BRANCH RATIO MEASURING METHOD, AND OPTICAL MULTIPLEXING/DEMULTIPLEXING CIRCUIT MANUFACTURING METHOD (18020557)

Main Inventor

Takui UEMATSU

Brief explanation

The abstract describes a device, method, and manufacturing process for measuring branch ratios without the need for optical sources.

Abstract

The present disclosure is to provide a branch ratio measuring device, a branch ratio measuring method, and an optical multiplexer/demultiplexer circuit manufacturing method that do not require any optical sources for measurement.

SECRET DECISION TREE TEST APPARATUS, SECRET DECISION TREE TEST SYSTEM, SECRET DECISION TREE TEST METHOD, AND PROGRAM (18044503)

Main Inventor

Koki HAMADA

Brief explanation

The abstract describes a secret decision tree test device that is used to evaluate a division condition at each node of a decision tree. This device performs secret calculations to learn the decision tree. It includes a memory and a processor. The processor is responsible for inputting a numerical attribute value vector, a label value vector, and a group information vector. These vectors contain specific numerical attribute values, label values, and grouping information of the data set used for learning the decision tree. The processor then calculates first to fourth frequencies using these vectors and evaluates the division condition using these frequencies.

Abstract

A secret decision tree test device configured to evaluate a division condition at each of a plurality of nodes of a decision tree when learning of the decision tree is performed by secret calculation, the secret decision tree test device includes a memory; and a processor configured to execute inputting a numerical attribute value vector composed of specific numerical attribute values of items of data included in a data set for learning of the decision tree, a label value vector composed of label values of the items of the data, and a group information vector indicating grouping of the items of the data into the nodes; and calculating, using the numerical attribute value vector, the label value vector, and the group information vector, first to fourth frequencies, to evaluate the division condition using the first to fourth frequencies.

DETECTION DEVICE, DETECTION METHOD, AND DETECTION PROGRAM (18022747)

Main Inventor

Satoshi FURUTANI

Brief explanation

The abstract describes a detection device that consists of a signal processing unit and an estimation unit. The signal processing unit updates the evaluation value of a vertex in a graph using belief propagation. This is done by using a matrix generated from arguments on the complex plane that represent the direction of the graph's side where some vertices have labels. The estimation unit then uses the evaluation value to estimate the label of a vertex in the graph.

Abstract

The detection device () has the signal processing unit () and the estimation unit (). The signal processing unit () updates the evaluation value of the vertex of the graph by belief propagation, on the basis of the matrix generated using the argument on the complex plane expressing the direction of the side of the graph in which at least some vertices are labeled. The estimation unit () estimates a label of a vertex of the graph on the basis of the evaluation value.

OBFUSCATION DEVICE, OBFUSCATION METHOD, AND OBFUSCATION PROGRAM (18020626)

Main Inventor

Yuma KUROGOME

Brief explanation

This abstract describes an obfuscation device that converts binary data into a different representation to make it harder to understand or reverse engineer. The device includes an analyzing unit that converts the binary data into an intermediate representation. A rewriting unit then inserts a predetermined code into the intermediate representation and rewrites it into a second intermediate representation. Finally, an output unit reads the inserted code, converts the second intermediate representation back into binary data, and outputs it when needed.

Abstract

An obfuscation device () includes an analyzing unit () that converts first binary data output as an executable file into a first intermediate representation, a rewriting unit () that inserts a predetermined code called when the first binary data is output into the first intermediate representation acquired from the analyzing unit () and rewrites the first intermediate representation into a second intermediate representation, and an output unit () that reads the predetermined code inserted by the rewriting unit (), converts the second intermediate representation into executable second binary data, and outputs the second binary data when the second intermediate representation is to he converted into binary data.

PROGRAM PROTECTION APPARATUS, PROGRAM PROTECTION METHOD, AND PROGRAM PROTECTION PROGRAM (18024515)

Main Inventor

Yuhei KAWAKOYA

Brief explanation

The program protection device described in the abstract consists of two main components: an encoding unit and an output unit. The encoding unit takes a program that needs to be protected and applies a specific encoding algorithm to it. It also stores information required for decoding the encoded program in a relocation table within the encoded program. The output unit then takes the encoded program generated by the encoding unit and outputs it as a protected program.

Abstract

The program protection device () includes an encoding unit () and an output unit (). An encoding unit () encodes a program to be protected according to a specific encoding algorithm, and stores information used for decoding the encoded program in a relocation table of the encoded program. The output unit () outputs the program encoded by the encoding unit () as a protected program.

LEARNING METHOD, CLUSTERING METHOD, LEARNING APPARATUS, CLUSTERING APPARATUS AND PROGRAM (18043166)

Main Inventor

Tomoharu IWATA

Brief explanation

The abstract describes a learning method that uses a computer to process data. The method involves inputting data and labels representing clusters to which the data belongs. The data is then converted using a neural network to generate representation data. The representation data is then clustered, and an evaluation scale is calculated to measure the performance of the clustering. Based on this evaluation, the method learns and adjusts the parameters of the neural network.

Abstract

A learning method, executed by a computer including a memory and a processor, includes: inputting a plurality of items of data, and a plurality of labels representing clusters to which the plurality of items of data belong; converting each of the plurality of items of data by a predetermined neural network, to generate a plurality of items of representation data; clustering the plurality of items of representation data; calculating a predetermined evaluation scale indicating performance of the clustering, based on the clustering result and the plurality of labels; and learning a parameter of the neural network, based on the evaluation scale.

LEARNING DEVICE, LEARNING METHOD AND LEARNING PROGRAM (18024512)

Main Inventor

Masanori YAMADA

Brief explanation

The abstract describes a system that acquires data and predicts labels for that data. The system uses a learning unit to learn a model that represents the probability distribution of the labels. This model is trained using a correct answer label as a filter, which helps the system predict labels correctly even when there is noise added to the data.

Abstract

An acquisition unit acquires data for which a label is to be predicted. A learning unit learns a model representing a probability distribution of a label of the acquired data by using, as a filter, a correct answer label of the data so as to correctly predict a label for an adversarial example in which noise is added to the data.

ESTIMATION METHOD, ESTIMATION APPARATUS AND PROGRAM (18023670)

Main Inventor

Takehito MIYAZAWA

Brief explanation

This abstract describes an estimation method executed by a device. The method involves estimating a feature quantity of a point cloud, deriving a depth vector of the point cloud, estimating a shift amount of the point cloud coordinates based on the feature quality, shifting the coordinates of the point cloud based on the shift amount and depth vector, and estimating parameters of a plane that fits the coordinates of the point clouds.

Abstract

An estimation method is an estimation method executed by an estimation device, and includes a feature estimation step of estimating a feature quantity regarding coordinates of a point cloud, a depth derivation step of deriving a depth vector of the point cloud on the basis of predetermined parameters, a shift amount estimation step of deriving a shift amount of the coordinates of the point cloud on the basis of the feature quality, a shift processing step of shifting the coordinates of the point cloud on the basis of the shift amount and the depth vector, and a plane estimation step of estimating parameters of a plane that fits the coordinates of the point clouds including the point cloud whose coordinates have been shifted.

WIRELESS SYSTEM, TERMINAL APPARATUS, BASE STATION, WIRELESS TRANSMISSION METHOD, AND WIRELESS TRANSMISSION PROGRAM (18022306)

Main Inventor

Mitsuki NAKAMURA

Brief explanation

This abstract describes a wireless system that consists of a terminal and a base station. The terminal has a wireless communication module and a control unit. It can transmit and receive data to and from the base station. When motion is detected in a video, the control unit sends a still image from the video to the base station. If the base station requests the full video, the control unit transmits it. The base station has its own control unit, which determines whether to request the video based on the still image. If it decides to request the video, it asks the terminal to send it.

Abstract

A wireless system according to an embodiment includes at least one terminal and a base station. The terminal includes a wireless communication module and a first control unit. The wireless communication module transmits and receives data to and from the base station. When motion is detected from an acquired video, the first control unit transmits a frame image, which is a still image extracted from the video, to the base station by using the wireless communication module, and transmits the video to the base station by using the wireless communication module when transmission of the video is requested by the base station as a result of transmitting the frame image. The base station includes a second control unit. The second control unit determines whether or not to request transmission of a video on the basis of a frame image, and requests a terminal to transmit a video when determining to request transmission of a video.

DIRECT CURRENT DISTRIBUTION SYSTEM, CONTROL APPARATUS, ANOMALY DETECTION METHOD AND PROGRAM (18042486)

Main Inventor

Naoki HANAOKA

Brief explanation

The abstract describes a DC power distribution system that transfers power from a power distribution side base to one or more power reception side bases through a power distribution network. The system includes measuring instruments at both the power distribution side base and the power reception side bases, as well as a control device. The control device consists of an operation unit that collects voltage and current measurements from the measuring instruments and calculates the total power output from the power distribution side base, the total power input to the power reception side bases, and the total power loss between them. It also includes a control unit that detects any abnormalities in the distribution network by comparing the total power output with the sum of the total power input and the total power loss.

Abstract

A DC power distribution system for performing DC power distribution from a power distribution side base to one or more power reception side bases via a power distribution network includes measuring instruments provided at the power distribution side base and at the one or more power reception side bases, and a control device, in which the control device includes an operation unit that acquires a voltage value and a current value measured by the measuring instrument and calculates an output side power sum that is a sum of power output from the power distribution side base, a power reception side power sum that is a sum of power input to the one or more power reception side bases, and a loss sum between the power distribution side base and the one or more power reception side bases, and a control unit that detects an abnormality in the distribution network by comparing the output side power sum with a total sum of the power reception side power sum and the loss sum.

BEAMFORMING PREDICTION DEVICE, METHOD AND PROGRAM (18020572)

Main Inventor

Yitu WANG

Brief explanation

The present disclosure describes a device that performs beamforming, which is a technique used in wireless communication systems to improve signal quality, taking into account the dynamic environment in which a user is moving. The device includes a storage unit that stores a dictionary and a fingerprint database based on user trajectories. It also includes a trajectory prediction unit that calculates the movement path of a mobile terminal using its location information. A fingerprint estimation unit applies the trajectory to the dictionary and calculates sparse coefficients corresponding to the trajectory. Finally, a beamforming calculation unit uses the sparse coefficients and the fingerprint database to calculate the beamforming for the mobile terminal.

Abstract

The present disclosure is to perform beamforming corresponding to the influence of a dynamic environment in which a user moves. The present disclosure relates to a beamforming prediction device that includes: a storage unit that stores a dictionary D obtained by learning fingerprints based on trajectories, and a fingerprint database based on trajectories; a trajectory prediction unit that calculates a trajectory of a mobile terminal, using location information about the mobile terminal; a fingerprint estimation unit that applies the trajectory of the mobile terminal to an input of the dictionary D, and calculates the sparse coefficient X corresponding to the trajectory of the mobile terminal; and a beamforming calculation unit that calculates beamforming of the mobile terminal, using the sparse coefficient X calculated by the fingerprint estimation unit and the fingerprint database.

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION APPARATUS (18022267)

Main Inventor

Shuki WAI

Brief explanation

This abstract describes a wireless communication method that involves receiving a signal from one wireless station and transmitting it to another wireless station. It also includes transmitting and receiving a control signal related to switching the reception beam or transmission beam used in the communication. The method involves controlling the switching of the beams based on the received control signal.

Abstract

A wireless communication method includes a reception step of receiving a signal transmitted from a first wireless station, a transmission step of transmitting the signal received in the reception step to a second wireless station, a control signal transmission/reception step of transmitting/receiving a control signal related to switching of a reception beam used in the reception step or a transmission beam used in the transmission step, and a beam control step of controlling switching of the reception beam or the transmission beam on the basis of the control signal.

COMMUNICATION MONITORING SYSTEM (18024939)

Main Inventor

Yuka OKAMOTO

Brief explanation

The abstract describes a communication monitoring system that can monitor the state of a connection device using optical passive components. The system includes photodetectors, recognition units, a processing unit, a light emitting unit, a mixing unit, a separation unit, a collection unit, and a management unit. The photodetectors detect optical signals passing through the connection device, and the recognition units determine the state of detection. The processing unit generates information about the communication state of the connection device based on the recognition. The light emitting unit converts this information into an optical monitoring signal, which is transmitted through an optical communication line. The monitoring signal is mixed with other signals by the mixing unit and then separated by the separation unit. The separated monitoring signal is outputted to the management unit, which manages the state of a PON (Passive Optical Network).

Abstract

Provided is a communication monitoring system capable of monitoring a state of a connection device that forms an optical path by using an optical passive component. A communication monitoring system () includes a plurality of photodetectors () provided in a connection device (), a plurality of recognition units (), a processing unit (), a light emitting unit (), a mixing unit (), a separation unit (), a collection unit (), and a management unit (). The photodetector () detects an optical signal passing through a corresponding optical path. The recognition unit () recognizes a state of detection by the corresponding photodetector (). The processing unit () generates information regarding a communication state of the connection device () on the basis of the recognition by each recognition unit (). The light emitting unit () converts the generated information into a monitoring signal that is an optical signal and transmits the monitoring signal. The monitoring signal is passed through an optical communication line () as a mixed signal by the mixing unit () and is separated from the mixed signal by the separation unit (). The collection unit () outputs the separated monitoring signal to the management unit () that manages a state of a PON ().

COMMUNICATION MONITORING APPARATUS AND COMMUNICATION MONITORING SYSTEM (18024926)

Main Inventor

Tomoya HATANO

Brief explanation

The abstract describes a communication monitoring device and system that can monitor the status of a connection device using an optical passive component. The communication management device in the system includes photodetectors, recognition units, a processing unit, and a transmission unit. The photodetectors are located in the connection device, which connects multiple optical communication lines using an optical passive component to create optical paths for signals. Each photodetector detects the optical signals passing through its corresponding optical path, and each recognition unit determines the state of detection for each photodetector. The processing unit generates information about the communication state of the connection device based on the recognized detection states, and the transmission unit sends this information to a receiving unit outside the communication monitoring device.

Abstract

Provided is a communication monitoring device and a communication monitoring system capable of monitoring a state of a connection device that forms an optical path by using an optical passive component. A communication management device () of a communication monitoring system () includes a plurality of photodetectors (), a plurality of recognition units (), a processing unit (), and a transmission unit (). The photodetectors () are provided in a connection device (). The connection device () connects a plurality of optical communication lines () by using an optical passive component to form a plurality of optical paths through which optical signals pass. Each photodetector () detects an optical signal passing through the corresponding optical path. Each recognition unit () recognizes a state of detection of the optical signal by the corresponding photodetector (). The processing unit () generates information regarding a communication state of the connection device () on the basis of information regarding the state of detection recognized by each recognition unit (). The transmission unit () transmits the information regarding the communication state of the connection device () generated by the processing unit () to a receiving unit () outside a communication monitoring device ().

OPTICAL COMMUNICATION MONITORING DEVICE (18025374)

Main Inventor

Sei KOU

Brief explanation

The abstract describes a device that controls multiple optical paths without using electricity. It uses optical sensors to detect signals passing through the paths. The device then determines the communication status of each path based on the sensor readings and transmits this information.

Abstract

A plurality of optical sensors () are installed in an optical path control device () configured to control a plurality of optical paths () without using an electrical element. The plurality of optical sensors () detect optical signals each passing through at least one of the plurality of optical paths (). A transmitter () simultaneously determines communication states of the plurality of optical paths () based on detection of the optical signals by the plurality of optical sensors (), and transmits information on the determined communication states.

Optical Burst Transmitter (18043925)

Main Inventor

Yasuhiko Nakanishi

Brief explanation

The abstract describes a highly efficient optical burst transmitter. It consists of a control circuit that generates a data signal and a burst control signal. The transmitter also includes a semiconductor optical amplifier that produces an optical burst data signal by modulating the data signal. The control circuit and the semiconductor optical amplifier are connected by an electric line, which transmits the burst control signal. Additionally, there is an impedance matching circuit that ensures the characteristic impedance of the electric line and the semiconductor optical amplifier are matched.

Abstract

A highly efficient optical burst transmitter is provided. An embodiment is an optical burst transmitter including a control circuit configured to output a data signal and a burst control signal and a semiconductor optical amplifier configured to output an optical data signal modulated using the data signal as an optical burst data signal controlled using the burst control signal, the optical burst transmitter including: an electric line configured to connect the control circuit and the semiconductor optical amplifier and transmit the burst control signal; and an impedance matching circuit configured to impedance-match a characteristic impedance of the electric line and the semiconductor optical amplifier with each other.

BASE STATION, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION PROGRAM (18022573)

Main Inventor

Mitsuki NAKAMURA

Brief explanation

This abstract describes a base station that includes various components such as an antenna, a wireless device, a wireless information acquisition unit, a control unit, a directivity setting unit, a directivity control unit, and a communication instruction unit. The base station uses an omni-directional array antenna to communicate with one or more terminals within its coverage area. The wireless information acquisition unit collects information about the position of the terminals and the time blocks for communication. Based on this information, the control unit determines the specific time block and antenna gain for communication with each terminal. The directivity setting unit then configures the omni-directional array antenna to have directivity towards the terminal's direction. The directivity control unit controls the actual directivity of the antenna based on the configured pattern. Finally, the communication instruction unit instructs the wireless device to communicate with the terminal during the determined time block.

Abstract

A base station according to an embodiment includes an antenna, a wireless device, a wireless information acquisition unit, a control unit, a directivity setting unit, a directivity control unit, and a communication instruction unit. The antenna has an omni-directional array antenna. The wireless device communicates with one or more terminals in a cover area by using a wireless signal via the antenna. The wireless information acquisition unit acquires wireless information including the position of the terminal and a communication time block. On the basis of the wireless information, the control unit determines a communication execution time block, which is a time block for executing communication with the terminal, and an antenna gain of the antenna for communicating with the terminal. On the basis of the antenna gain, the directivity setting unit sets a directivity pattern of the omni-directional array antenna so as to have directivity in the direction of the terminal. On the basis of the directivity pattern, the directivity control unit controls the directivity of the omni-directional array antenna. The communication instruction unit instructs the wireless device to communicate with the terminal in the communication execution time block.

COMMUNICATION SYSTEM, COMMUNICATION METHOD, NETWORK DEVICE AND PROGRAM (18028105)

Main Inventor

Yuhei KAWAKAMI

Brief explanation

The present disclosure describes a communication system that connects a first network and a second network through multiple paths. The system includes a transfer prevention unit that stops the transfer of broadcast frames, unknown unicast frames, and multicast frames from the second network to the first network. Instead, these frames are only transferred from the second network to the first network through a specific path among the multiple paths. The purpose of this system is to enable the transfer of unicast frames via a nearby boundary apparatus, even when communicating from an L2 network to an EVPN, and to avoid the overlapping distribution of BUM (Broadcast, Unknown unicast, and Multicast) frames.

Abstract

An object of the present disclosure is to transfer unicast via a boundary apparatus that is geographically close to a user apparatus even in communication from an L2 network to an EVPN and to prevent overlapping distribution of BUM. According to the present disclosure, there is provided a communication system in which a first network and a second network are connected to each other by a plurality of paths, in which, in the plurality of paths, a transfer prevention unit that prevents transfer of a broadcast frame, an unknown unicast frame, and a multicast frame from the second network to the first network is included, and in which a broadcast frame, an unknown unicast frame, and a multicast frame are transferred from the second network to the first network by only a specific path of the plurality of paths.

NETWORK CONFIGURATION ESTIMATION APPARATUS, NETWORK CONFIGURATION ESTIMATION METHOD AND PROGRAM (18042401)

Main Inventor

Masaru MATSUBAYASHI

Brief explanation

The abstract describes a device that can estimate the configuration information of a network within a target device. This device includes a processor and memory with instructions. The device sends a message to an electronic control unit on the network using a diagnostic communication method supported by the unit. It then receives a response to the message and uses that response to estimate the configuration information of the network.

Abstract

Provided is a network configuration estimation device for estimating configuration information of an internal network in a target device. The network configuration estimation device includes a processor; and a memory that includes instructions, which when executed, cause the processor to execute the following steps: transmitting a message to an electronic control unit on the internal network by using a diagnostic communication method supported in a standard manner in the electronic control unit on the internal network and receiving a response to the message; and estimating the configuration information of the internal network based on the obtained response.

TRANSFER SYSTEM, TRANSFER DEVICE, TRANSFER CONTROL DEVICE, AND PROGRAM (18022693)

Main Inventor

Takayoshi HIRASAWA

Brief explanation

The abstract describes a transfer device that can send packets through multiple physical lines. It includes a measurement unit that measures the performance of network requirements for each physical line. There is also a selection unit that chooses the physical line with the best performance. The transfer control device receives an advertisement with route information from the transfer device and offers a route instruction to a service based on the specified requirements.

Abstract

A transfer device is capable of outputting packets to a plurality of physical lines, and includes a measurement unit configured to measure performance of network requirements specified by a given service for each physical line; and a selection unit configured to select the physical line at which the measured performance is maximized from among the plurality of physical lines. A transfer control device includes an instruction unit configured to receive an advertisement including route information for selecting a route for each network requirement from a transfer device that outputs packets to a plurality of physical lines, and to offer a route instruction using the route information to a service for which the requirement is specified.

CONTROL APPARATUS, CONTROL METHOD, PROGRAM, AND COMMUNICATION SYSTEM (18023056)

Main Inventor

Mitsuo AMASAKA

Brief explanation

The abstract describes a control device that is used in software defined networking (SDN) to relay packets. The control device receives requests from an information processing device and transmits them to the relay device. If the processing load of the control device is below a certain threshold, it sequentially transmits each request and response. However, if the processing load exceeds the threshold, it collects multiple requests and responses and transmits them together.

Abstract

A control device includes a control unit configured to transmit a request received from an information processing device performing setting on a relay device relaying a packet in software defined networking (SDN) to the relay device. The control unit sequentially transmits each request from the information processing device to the relay device and sequentially transmits each response from the relay device in response to each of the requests to the information processing device when a processing load of the control device is equal to or less than a threshold, and transmits a request in which a plurality of requests from the information processing device are collected to the relay device and transmits a response in which responses to the plurality of requests are collected to the information processing device when the processing load of the control device is not equal to or less than the threshold.

CONTROL DEVICE, CONTROL METHOD, AND CONTROL PROGRAM (18023974)

Main Inventor

Masato NISHIGUCHI

Brief explanation

The abstract describes a management device that is capable of changing the allocated resources of a user who is using a communication line. The device can receive change requests from the manager of the communication line, the server managing information about the user's terminal, or the user themselves. When a change request is received, the device uses a predetermined method to make the necessary changes to the user's allocated resources.

Abstract

A management device includes: a reception unit that receives a change request for changing an allocated resource of a user who uses a communication line, from a manager of the communication line, a server managing information related to a use terminal of the communication line, or the user; and a change unit that changes the allocated resource of the user by using a predetermined change method when the reception unit receives the change request.

NOTIFICATION CONTROL APPARATUS, NOTIFICATION CONTROL METHOD, AND NOTIFICATION CONTROL PROGRAM (18022471)

Main Inventor

Reiko ARUGA

Brief explanation

The abstract describes a notification control apparatus that receives information about a user's movement event. It determines if the user has a schedule before or after the movement event and generates an advice based on this determination and the time of the event. The advice is then presented to the user.

Abstract

A notification control apparatus according to an embodiment includes: a reception unit that receives movement event information indicating that a movement event of a user has occurred; a schedule presence/absence determination unit that determines whether or not the user has a schedule immediately following or immediately preceding an occurrence time point of the movement event; a message generation unit that generates an advice to be notified to the user on the basis of the determination and the occurrence time point of the movement event; and a presentation unit that presents the generated advice to the user.

WIRELESS COMMUNICATION SYSTEM LINKING METHOD AND WIRELESS COMMUNICATION SYSTEM CONTROLLER (18022265)

Main Inventor

Shota NAKAYAMA

Brief explanation

The abstract describes a method for cooperation between a mobile communication system and a wireless LAN system in a 5G communication area. It involves allocating a communication quality indicator (5QI) to a service data flow and using a base station to ensure the desired communication quality. A priority condition is set for the wireless LAN frequency resource based on the 5QI. When a wireless terminal is handed over to the wireless LAN, the access point is instructed to follow the priority condition. The access point then communicates the service data flow according to the priority condition.

Abstract

The present disclosure provides a wireless communication system cooperation method appropriate for cooperation between a mobile communication system and a wireless LAN system involving priority control. In a communication area of 5G, a 5QI representing communication quality is allocated to a service data flow, and the communication of the service data flow is performed via a base station so that the communication quality is realized. A priority condition corresponding to 5QI is set for a frequency resource of the wireless LAN (step ). When the wireless terminal UE to be protected is handed over to the wireless LAN (step ), a priority condition set based on 5QI is instructed to the access point (step ). Thereafter, the access point performs communication of the service data flow according to the priority condition.

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION DEVICE (18023626)

Main Inventor

Shoko SHINOHARA

Brief explanation

This abstract describes a wireless communication method in a wireless communication system. The method involves determining whether a carrier sense band, which includes a transmission channel band and an adjacent carrier sense band, is busy or idle based on the reception state of a reception signal. If the carrier sense band is determined to be idle, a transmission signal is transmitted using the transmission channel.

Abstract

A wireless communication method in a wireless communication system includes carrier sense processing for determining whether a carrier sense band is in a busy state or an idle state on the basis of a reception state of a reception signal in the carrier sense band before transmitting a transmission signal using a transmission channel. The carrier sense band is set so as to include not only a transmission channel band which is a frequency band of a transmission channel but also an adjacent carrier sense band adjacent to the transmission channel band. When it is determined that the carrier sense band is in an idle state, transmission processing for transmitting a transmission signal by using a transmission channel is performed.

BASE STATION AND COMMUNICATION METHOD (18017658)

Main Inventor

Yasuhiko INOUE

Brief explanation

The abstract describes a base station that consists of multiple radio signal processing units, a carrier sense control unit, and a management unit. The radio signal processing units are responsible for transmitting and receiving radio signals on different channels. The carrier sense control unit performs collective carrier sensing on each channel using a common access parameter to determine if the channel is idle or busy. The management unit handles the transmission of radio signals through multiple types of channels when there are multiple links established between a radio signal processing unit and a terminal that is in an idle state.

Abstract

A base station () according to one aspect of the present invention includes a plurality of radio signal processing units (, , and ), a carrier sense control unit (), and a management unit (). The plurality of radio signal processing units (, , and ) transmit and receive radio signals of different channels. The carrier sense control unit () executes collective carrier sensing on a channel of each of the plurality of radio signal processing units (, , and ) using an access parameter common to the plurality of radio signal processing units (, , and ) and determines whether the channel is in an idle state or busy state. The management unit () performs processing for transmitting radio signals by a multi-link wirelessly connected through a plurality of types of channels when there are a plurality of links formed between a radio signal processing unit having the channel determined to be in an idle state and a terminal ().