Abstract: A wireless communication system includes a plurality of transmission devices configured to receive broadcast/multicast data transmitted from a broadcast/multicast data transmission device, convert the broadcast/multicast data into wireless frames, and broadcast/multicast the wireless frames to a plurality of reception devices, and the plurality of reception devices configured to receive the wireless frames broadcasted/multicasted from the plurality of transmission devices and acquire the broadcast/multicast data, and each of the plurality of transmission devices includes a broadcast/multicast transmission unit configured to generate the same wireless frame from the broadcast/multicast data and broadcast/multicast the generated wireless frame at the same transmission timing using the same MCS.

Abstract: An optical transmission system according to an embodiment includes: an optical transmission unit which modulates an optical signal into which a known signal is inserted and transmits the optical signal; and an optical reception unit which receives the optical signal from the optical transmission unit, wherein the optical reception unit includes: an optical receiver which performs coherent detection of a reception signal of the optical signal received from the optical transmission unit; a receiver transfer function estimation section which estimates a nonlinear response transfer function of the optical receiver based on the known signal included in the reception signal after the detection by the optical receiver; and a receiver compensation section which compensates nonlinear distortion of the reception signal after the detection based on the nonlinear response transfer function which the receiver transfer function estimation section estimates.

Abstract: An optical receiving device that divides receive signals obtained by receiving an optical signal using a coherent detection scheme into a plurality of frequency bands, matches timing of the receive signals along a time axis between the frequency bands resulting from the division, performs a combining process of combining the receive signals contained in the plurality of frequency bands, and compensates the receive signals for waveform distortion either before or after the combining process, includes: a first wavelength dispersion compensation unit adapted to compensate the receive signals for waveform distortion in each of the frequency bands resulting from the division; a first nonlinear compensation unit adapted to compensate the receive signals belonging to each of the frequency bands and timed with each other in a time domain for a nonlinear optical effect; and a second wavelength dispersion compensation unit adapted to compensate the receive signals belonging to each of the frequency bands and compensate

Abstract: A learning apparatus comprises a learning part that learns an error correction model by a set of a speech recognition result candidate and a correct text of speech recognition for given audio data, wherein the speech recognition result candidate includes a speech recognition result candidate which is different from the correct text, and the error correction model is a model that receives a word sequence of the speech recognition result candidate as input and outputs an error correction score indicating likelihood of the word sequence of the speech recognition result candidate in consideration of a speech recognition error.

Abstract: With a network design apparatus, a network design method, and a network design processing program, a network configuration is designed for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of a network configuration, a threshold value of an inter-end delay and the number of redundant paths are calculated for each line on the basis of topology information, line information, and design parameter information. A path candidate set is calculated for each line on the basis of the threshold value of the inter-end delay and the number of redundant paths.

Abstract: Data transmitted from an information transmission device can be stored in a distributed manner, without the need to duplicate or transmit/receive data among information storage devices. Under the control of a data write unit, end points to be assigned are determined in each of the information storage devices, based on the preset information indicating a correspondence between the information storage devices and end points assigned to the information storage devices. The data transmitted together with the identifier corresponding to the assigned end point is acquired from among the data transmitted from the information transmission devices, based on a first correspondence table stored in a shared setting storage unit for associating the end points with the identifiers of the types of data acquired by the end points, and the acquired data is stored in the data storage unit.

Abstract: A communication server device that mediates communication information transmitted and received between a plurality of communication terminals provides people who are participating in a conversation using real-time chat with information that can create a trigger to prompt them to end the conversation.

Abstract: A network design apparatus, a network design method, and a network design processing program design a network configuration for a network in which a transfer apparatus is disposed at each of a plurality of communication hubs, and the communication hubs are connected via a link by a link portion apparatus in the transfer apparatus. In design of the network configuration, the optimal path candidates of each of the lines minimizing a total cost value in the overall network is calculated. In the calculation of the optimal path candidates of each of the lines, only a path candidate of each of the lines can be selected, and a combination candidate of link portion apparatuses for each of the links is derived uniquely from the selected path candidate of each of the lines.

Abstract: An apparatus for estimating anomaly information includes an input unit configured to input anomaly data detected as anomaly by an anomaly detecting algorithm that outputs an anomaly degree of input data for vectors, using learning of the vectors in a normal state, and an estimate unit configured to search for one or more vectors that decrease the degree of anomaly when added to the anomaly data, taking into account a likelihood, for each dimension, of a given dimension being a cause of the anomaly, and estimate the cause of the anomaly based on the searched vectors whereby it is possible to estimate detailed information on a detected anomaly.

Abstract: An object is to provide a propagation property analyzing apparatus that can alleviate the influence of an error caused by crosstalk, and accurately evaluate a few-mode optical fiber that multiplexes a plurality of modes, in a distributional and non-destructive manner.

Abstract: It is possible to display the state of the current route even with a large change in visual field in an easy-to-understand manner. A grouping unit (102) groups a plurality of nodes included in a route on a map into groups having no change in line-of-sight in an order of travel direction on the route. A point generation unit (103) generates, for each of the groups grouped by the route grouping unit, a plurality of points included in a route of the group so that the route is divided into smaller sections by the points from a start point of the group toward an end point of the group. A viewpoint determination unit (104) determines, for each of the plurality of points, a viewpoint in accordance with a condition of the point. A walk-through display unit (105) performs walk-through display for displaying a scenery corresponding to the determined viewpoint.

Abstract: A signal forwarding system includes: a plurality of signal forwarding devices forming a plurality of communication routes between a slave station and a master station; and a route control device that determines a communication route, wherein the route control device includes at least: a communication route calculation unit that calculates a communication route in response to a route switching request; and a forward destination setting instruction unit that outputs forward destination setting information based on the communication route, the signal forwarding devices include at least: a forward destination setting instruction acquisition unit that acquires the forward destination setting information; a forward destination set unit that changes a forward destination based on the forward destination setting information; and a forward unit that outputs input traffic based on the forward destination, and any of the route control device and the signal forwarding devices includes: a traffic monitor unit; a non-signa

Abstract: A testing device includes: a first update unit that updates a screen transition diagram that is displayed on a display device and shows a transition of a screen state according to input of an operation on a screen relating to a program to be tested; and a second update unit that divides or integrates a node according to an operation of the node for each screen or each screen state in the screen transition diagram. Thus, the testing device makes it possible to obtain the advantage of exploratory testing while reducing a man-hour to perform the exploratory testing.

Abstract: The traffic flow estimation apparatus acquires images and position information and speed information, the images being captured at different timings by a first moving object that is in motion in a target area and including a second moving object around the first moving object, the position information and speed information being of the first moving object at the timings; estimates a lane in which the second moving object is in motion; and estimates a traffic flow for each lane in the target area based on the speed information of the first moving object, the information indicative of a change over time of positions of the second moving object, and the lanes in which the first moving object and the second moving object are in motion.

Abstract: An object is to provide a communication system and a base station capable of predicting future communication quality in order to enable variations in communication quality due to variations in environment to be addressed. A communication system and a base station according to the invention learn an input and output relationship from surrounding environment information of the base station that can be acquired by a camera, a sensor, or the like, terminal information such as position information of a terminal and current communication quality to generate a learning model, and predict future communication quality using the learning model, the surrounding environment information, and the terminal information.

Abstract: A plurality of parameter values can be simultaneously selected to achieve faster optimization of the parameters. An optimization apparatus 10 includes: an evaluation unit 120 configured to perform calculation based on evaluation data and parameter values to be evaluated and output evaluation values representing evaluation of calculation results; a selection unit 100 configured to train a model for predicting the evaluation values for the parameter values based on the evaluation values output at the evaluation unit 120 and a combination of the parameter values and determine, based on the trained model, a plurality of the parameter values to be next evaluated at the evaluation unit 120; and an output unit 160 configured to output an optimized parameter value obtained by repeating processing at the evaluation unit 120 and determination at the selection unit 100.

Abstract: A radio communication method of connecting a base station with a plurality of terminal stations, the base station including a plurality of radio communication units compatible with a predetermined communication standard, the method including collecting additional-line information including information regarding whether each terminal station is compatible with additional communication standard; collecting request information including a request in the predetermined communication standard of each terminal station; collecting identifier information that identifies each terminal station; calculating, based on the additional-line information, the request information and the identifier information that are collected, a setting policy including a setting for each radio communication unit, and a switching policy of setting a condition for switching the plurality of radio communication units; and setting, for each radio communication unit, the terminal station to be connected based on the setting policy and the switch

Abstract: According to the present invention, in a wireless communication system that performs single carrier MIMO transmission between a transmitting station device and a receiving station device, the transmitting station device including: a time-domain linear equalization unit configured to remove inter-symbol interference and inter-stream interference from a data signal to be transmitted to the receiving station device; a propagation path characteristics estimation unit configured to receive a training signal which is transmitted by the receiving station device and estimate a transfer function matrix of propagation path characteristics; and a filter tap calculation unit configured to calculate filter tap coefficients for the time-domain linear equalization unit by representing the estimated transfer function matrix as a matrix polynomial, taking an inverse response of the matrix polynomial as a transmit weight matrix, and approximating the transmit weight matrix with Neumann series, and the receiving station device

Abstract: An input value setting assistance device includes: an acquisition unit that displays a first screen including a plurality of input fields, and acquires an image of the first screen and a coordinate value regarding each of the input fields included is the first screen; and an assistance unit that displays a second screen including the image acquired by the acquisition unit regarding the first screen and setting fields for setting values for each of the input fields of the first screen and, when one of the setting fields is selected, displays a prescribed mark based on the coordinate value acquired by the acquisition unit for the input field related to the setting field. Thereby, the setting work of each of the input values prepared in advance for each of the input fields included is the screen can be effectively assisted.

Abstract: A communication system is a communication system connected to an upper network and a lower network, and includes at least one intermediate communication device including a plurality of upper ports for inputting and outputting optical signals to and from the upper network, and a plurality of lower ports for inputting and outputting optical signals to and from the lower network, the intermediate communication device being configured to relay communication between the upper network and the lower network, a switching device that is connected to the upper and lower networks and the plurality of upper and lower ports, switches a connection between the upper network and the plurality of upper ports, and switches a connection between the lower network and a plurality of lower ports, and a control device that outputs, to the switching device, an instruction to switch the connection by the switching device according to a communication status between the upper network and the lower network.