Nippon Telegraph and Telephone Corporation

Kohei Mizuno

Atsushi Taniguchi

Takeru Inoue

Riichi Kudo

Toru Mano

Kazuya Anazawa

Kahoko Takahashi

Hirohito Suda

Masaaki Nishino

Norihito Yasuda

Eisuke Kudoh

Kengo Nakamura

Masakazu Ishihata

An object is to provide a communication system and a terminal 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 terminal according to the present invention learn an input and output relationship from terminal information such as surrounding environment information of the terminal that can be acquired by a camera, a sensor, or the like, and position information of the 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.

Communication system and terminal

Quality of communication between a terminal and an external communication device in response to control of the terminal is predicted by acquiring surrounding environment information or/and terminal information of the terminal, and the terminal is controlled to improve the communication quality, avoid fatal communication quality degradation, or satisfy a control condition of the terminal for the communication quality, thereby realizing control that satisfies a predefined required condition related to communication.

Terminal and communication system

It is an objective of the present disclosure to reduce computational complexity for obtaining a network topology configuration capable of efficiently accommodating a plurality of traffic demands assumed between nodes present in a network. A device of the present disclosure includes: a computation traffic generation unit that creates a traffic demand matrix whose elements are values individually obtained by demands between nodes present in a target network area from a plurality of traffic demand matrices created based on predicted traffic demands between the nodes; and a network topology generation unit that generates a network topology based on the traffic demand matrix generated by the computation traffic generation unit and port information of the nodes in the network area.

Techniques for generating network topologies that accommodate different traffic demands

An event regarding control of a terminal that significantly affects communication quality with which communication between the terminal and an external communication device is performed is predicted by acquiring surrounding information of the terminal using a surrounding environment information collection unit, and a packet loss caused in communication, communication disconnection, and communication quality that does not meet required performance are prevented using communication control to change setting related to communication, such as selection/addition/deletion of a communication counterpart, selection/change of a communication scheme, a change in modulation scheme, coding rate, and number of spatial multiplexings of communication, and a change in setting of an automatic gain controller of a receiver for communication.

Communication device and communication system

An object of the present disclosure is to enable prediction of communication quality in accordance with wireless communication under frequency conditions as combinations of frequencies and frequency bandwidths. The present disclosure provides a system including: an environment information generation unit configured to generate environment information of a terminal that performs wireless communication; a communication prediction model storage unit configured to store a plurality of communication prediction models obtained by learning relationships between the environment information and communication quality of wireless communication under frequency channel conditions; a communication prediction model generation unit configured to select one or more communication prediction models from among the plurality of communication prediction models and use the selected communication prediction models to generate a communication prediction model; and a communication prediction unit configured to input the environment information generated by the environment information generation unit to the communication prediction model generated by the communication prediction model generation unit and predict current or future communication quality of the terminal.

System, device, method and program that predict communication quality

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.

Communication system and base station

An object of the present invention is to provide a mobile terminal capable of predicting fluctuation in communication quality. The mobile terminal according to the present invention uses terminal information consisting of position/orientation/speed/component operation/control command information/camera information/sensor information, and the like of the mobile terminal to model a relationship with communication quality and predict the communication quality using the obtained communication quality prediction model. When fluctuations in communication quality can be predicted, it is possible to cope with the fluctuations (especially deterioration) in communication quality in advance (for example, to change a communication destination station, to decrease a data rate in an application, or to change a control mode of a terminal to a safer mode, by knowing in advance deterioration in quality of a radio signal).

Mobile terminal and communication quality prediction method

An object of the present disclosure is to perform automatic restoration from network failures even when complicated operations for executing a plurality of commands are required. The present disclosure relates to a network setting device that is communicatively connected to a plurality of network devices and performs a setting of the plurality of network devices. The network setting device performs a first step for determining whether a network including the plurality of network devices satisfies a predetermined operational policy. When the predetermined operational policy is not satisfied, the network setting device executes processing for: performing a second step for determining whether a reachable range of a packet expands with addition of one of one or more new candidate commands to a temporary update command sequence; deleting a command at an end of the temporary update command sequence on condition that the reachable range does not expand with addition of any one of the new commands; and then returning to the first step, until the predetermined operational policy is satisfied.

Network setting device, method and program

Provided are a reliability estimation system and a reliability estimation method capable of reducing a calculation amount of a reliability of a plurality of networks between terminals in communication between the terminals over the plurality of networks. The reliability estimation system according to the present invention calculates, for each network, a contraction reliability R, a contraction reliability R' when nodes are contracted, and a contraction reliability R&#x2032; between the networks including the terminals, and a true value of the reliability between the terminals over the plurality of networks is between a product P1 (=R&#x2032; R) and a product P2 (=R&#x2032; R&#x2032;). Instead of calculating the true value of the reliability, only an upper limit and a lower limit are calculated, and thus, it is possible to significantly low additional remark the calculation amount.

Reliability estimation system and reliability estimation method

Each radio station can manage a plurality of channels, and functions both as a master station which controls transmission in each channel and a slave station which operates under control of a master station. In case of a master station, it transmits a signal under control of the own station, and in case of a slave station, it transmits a signal under control of the master station. Each radio station can communicate with any other radio station either directly or through another radio station. In each channel, communication is carried out in time division of centralized control access phase and distributed control access phase. A master station in case of centralized control access phase is determined in each channel and in each link.

Growing community of inventors

Kanagawa, Japan

Kohei Mizuno