Ntt Corporation

Takafumi Tanaka

Masayuki Shimoda

Takuya Ohara

Takuya Oda

Fumikazu Inuzuka

Kei Kitamura

Hideki Nishizawa

Seiki Kuwabara

Tetsuro Inui

Shokei Kobayashi

Seiji Okamoto

One aspect of the present invention is an information processing system including a computing machine installed in a computing machine base, a first transmission/reception device connected to the computing machine, a second transmission/reception device installed in a user base used by a user, a device connected to the second transmission/reception device, and a delay control device configured to measure a delay amount generated between the first transmission/reception device and the second transmission/reception device and control the measured delay amount.

Information processing system, delay control device, information processing method and program

An optical path design device includes a scheduling unit configured to generate, according to demand information, including information on a frequency bandwidth required for communication between a first node device at a start point of an optical path and a second node device at an end point of an optical path, and including information on a future time zone in which the communication will be executed, allocation content including information on a route connecting the first node device and the second node device and information on a center frequency of the frequency allocated to the communication corresponding to the demand information and determine the start time and the end time of the allocation of the allocation content, and a queue for adjusting a timing of allocation of the allocation content in the future time zone based on the start time and the end time of the allocation in a case where the allocation content cannot be allocated to the communication corresponding to the demand information with the current time as the start time of the allocation.

Optical path design apparatus, optical path design method and program

An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.

Optical transmission system and transmission mode selecting method

An aspect of the present invention is a communication path search device that constructs a multicast path of a plurality of nodes connected to a network, the communication path search device including a network device information management unit configured to manage a device specification including constraint information on the number of branches of each of the nodes on the network, a network topology management unit configured to manage link information between the nodes on the network, and a multicast tree calculation unit configured to construct a Steiner tree of a path connecting a start node and an end node based on a new request, an existing request, the constraint information on the number of branches of each of the nodes, constraint information on a maximum number of branches of each of the nodes, and the link information, the new request and the existing request each including start node and end node information.

Communication path finding device, communication path finding method, and program

Distribution devices are each connected to a single or a plurality of line switching networks and a single or a plurality of packet switching networks, selects either the line switching network or the packet switching network as the distribution destination on the basis of distribution policy information in a case where data to which the service providing device or the calculation device is set as a transmission destination, and transmits the received data to the selected switching network is received, and the distribution device captures the received data on the basis of the aggregation policy information and transmit the data to the service providing device or the calculation device corresponding to the transmission destination of the captured data in a case where data transmitted by the other distribution device is received from the line switching network or the packet switching network.

Growing community of inventors

Musashino, Japan

Takafumi Tanaka