Nippon Telegraph and Telephone Corporation

Naoki Higo

Toshimitsu Tsubaki

Takeshi Kuwahara

Ryota Ishibashi

Kojun Koshiji

Takuma Tsubaki

Yoshiko Sueda

Masanao Nakano

Tatsuya Ishihara

Kotaro Ono

Yuki Nakahara

Kenta Kawakami

Yusuke Urata

Masao Aihara

Yuki Yano

Takao Kurahashi

A control device includes an information acquisition unit that receives a source address of a packet from a node that receives the packet transmitted from a user terminal, and acquires position information about the user terminal on a basis of the source address, a determination unit that determines a hub to which the user terminal should connect, on a basis of the position information, and a control execution unit that launches an application in the hub and changes a routing such that packets transmitted from the user terminal are transmitted to the application.

Control apparatus, control method and program

A message relay apparatus and a message relay method that achieve high message reachability taking communication network situation into consideration are provided. A message relay apparatusinterposed between an applicationand a deviceincludes a device communication state determination functional unitthat determines communication availability with the device, a network state estimation unitthat estimates a network state based on the communication availability, and a message processing unitthat determines forwarding availability of an application message based on the network state and buffers the application message when forwarding is not available.

Message relay apparatus and method

Backup system and method that can determine a backup destination in consideration of disaster are provided. There are provided: a data acquisition unitthat acquires disaster information, network information, and node information; a replication group construction unitthat generates, based on the disaster information, and the like, replication group information including association information between a first node that stores original data and one or more second nodes that are candidates for backup destination of the original data, and saves the replication group information in a storage unit; a replication destination node calculation unitthat, when executing backup of the original data, calculates the second node as backup destination from the replication group; and a replication processing unitthat replicates and stores the original data into the storage of the second node.

Backup system, method therefor, and program

A system and method capable of efficiently using and operating resources and allowing a cluster satisfying requirements of functions/services provided to terminals to be configured of multi-access edge computing (MEC) servers are provided. A clustering systemincludes a monitoring unitconfigured to monitor a usage status of MEC servers and a network and store telemetry information in a storage unit, a cluster planning request unitconfigured to acquire non-telemetry information such as provision area information and requirement information of functions/services and deployment information of the MEC server, store the non-telemetry information in the storage unit, a cluster planning unitconfigured to set a virtual region including one or more bases satisfying a provision area and requirements on the basis of each piece of information in the storage unitand calculate a cluster plan for providing the functions/services from a plurality of MEC servers disposed at the base belonging to the virtual region, and a cluster construction unitconfigured to perform a clustering process on the basis of the cluster plan.

Clustering system and clustering method for providing services using multi- access edge computing servers

A resource allocation device includes: a course estimation unit that estimates a course of each mobile terminal based on a location of a mobile terminal acquired from a network device, and estimates a probability that each mobile terminal is located in each area at time of prediction; a determination unit that calculates, for each area, the number of mobile terminals in the area using the probability and determines whether the maximum value of an overcommit ratio for each area exceeds an upper limit; and an execution unit that executes the allocation or release of resources to an MEC server group located in each area when the maximum value of the overcommit ratio is equal to or less than the upper limit, and refrains from executing the allocation or release of the resources to the MEC server group when the maximum value of the overcommit ratio exceeds the upper limit.

Resource allocation apparatus, resource allocation method and resource allocation program

A data transmission apparatus causes a computer to receive first data and second data, each of which has a different transmission destination, evaluate relevance between the first data and the second data, and transmit the first data and the second data to the respective transmission destinations, and the transmitting of the data further includes transmitting the first data to the transmission destination of the second data in accordance with evaluation results obtained in the evaluating of the relation, so that a diversity of the data that can be collected by the transmission destination of the data is increased.

Data transmission method, data transmission apparatus and program

A video management device includes a storage processing unit configured to store video data received through a network in a storage unit, a calculation unit configured to classify a video data group stored in the storage unit based on combinations of imaging locations and content of video data, and to calculate a frequency of appearance of each of the combinations, and a selection unit configured to select video data to be deleted from the storage unit based on the frequency of appearance, thereby increasing a possibility that the deletion of a high-value video will be avoided.

Video management apparatus, video management method and program

Provided is a virtual world construction system that does not impair consistency between virtual worlds and places only small loads on terminals. A client applicationthat is implemented on a user terminal, a plurality of server applicationsthat are implemented on servers, and a proxythat is located on a communication path between the user terminal and the servers and relays operation information and video information are provided. The proxyincludes a motion duplication unitthat transmits operation information to the plurality of servers by duplicating the operation information, and a video integration/rendering control unitthat transmits timing information regarding rendering timing to the plurality of servers, and transmits video information received from at least one of the servers, to the user terminals. A rendering processing unit/video processing unitof each of the servers performs rendering processing and video information transmission processing based on the timing information received from the proxy

Virtual world construction system and method

Communication quality is improved by performing, with a computer, determining whether redundancy of a communication path is necessary or not and a compression level of data based on communication quality associated with transfer of the data; compressing data to be transferred in accordance with the compression level determined; and a transmission step of, when it is determined that redundancy of the communication path is necessary, making the communication path redundant and transmitting the data to each of the resulting communication paths.

Data transfer method, data transfer device and program

An information delivery technique for, at the time of delivery of area information via a network, delivering area information about a destination before a device arrives at the destination is disclosed. One aspect of the present disclosure is an information delivery apparatus including a delivery information management function unit configured to manage area information to be delivered, a destination management function unit configured to manage a destination of a device, and a communication function unit configured to deliver the area information to the device, wherein the destination management function unit determines the destination of the device using movement information about the device, and the communication function unit delivers area information about the destination to the device before the device moves to the destination.

Information delivery apparatus, information delivery method and program

A time providing method includes: by a computer, upon receiving data from a device, estimating a generation time of the data using a reception time of the data and a first delay time of the device previously estimated; providing information indicating the generation time to the data; and transmitting the data provided with the information indicating the generation time to a destination of the data.

Time stamping method, time stamping apparatus and program

A video management apparatus includes a storage processing unit configured to store, in a storage unit, video data received through a network, a determination unit configured to determine whether or not video data groups stored in the storage unit are analyzed based on a first period of time indicating a period of time until a free capacity becomes insufficient in the storage unit and a second period of time indicating a maximum analysis time required for analysis of the video data groups, a first calculation unit configured to analyze the video data groups to calculate a predetermined statistic in a case where it is determined that the video data groups are analyzed, and a deletion unit configured to delete the analyzed video data groups.

In one aspect of the present invention, a transfer apparatus includes a reception unit configured to receive a packet from a source which distributes data according to a transmission control protocol (TCP); a storage unit configured to store data included in the received packet in a buffer based on a TCP sequence number of the received packet; a TCP transfer unit configured to transfer the received packet to a first sink which requests distribution according to the TCP; and a UDP transfer unit configured to read the data from the buffer and transfer the read data to a second sink which requests distribution according to a user datagram protocol (UDP).

Transfer apparatus, transfer method, and program for transporting data from a single source to sinks with different communication requirements

A data distribution system including a source configured to distribute data and a sink configured to process the distributed data includes a marker configured to receive a packet distributed by the source, add supplementary information to the received packet based on information obtained from a header of the packet, and transfer the packet; and a filter configured to receive the packet transferred by the marker, determine whether the received packet can be transferred to the sink based on the supplementary information added to the packet, transfer the packet to the sink if the packet can be transferred to the sink.

Growing community of inventors

Musashino, Japan

Naoki Higo