Nippon Telegraph and Telephone Corporation

Yokogawa Electric Corporation

Daisuke Ikegami

Hiroshi Yamamoto

Hirotada Honda

Sorami Nakamura

Jun Okamoto

Keisuke Ishibashi

Yusaku Yoshida

Shunsuke Baba

Taichi Kawano

Tatsuaki Kimura

Hideki Ogawa

Shoji Kono

Rie Tagyo

A control device of the present invention is for calculating allocation information regarding the allocation of wireless resources of a plurality of base stations to a plurality of user devices. The control device includes: information managing means for storing request data amounts of the user devices; calculating means for calculating an estimated waiting time for each of the user devices by dividing the request data amount by an available bandwidth, and, using the maximum transmission power of the base stations as a constraint, calculating the allocation information regarding the allocation of the wireless resources of the base stations to the user devices so as to minimize the estimated waiting time of the user device having the highest estimated waiting time; and outputting means for outputting the allocation information that was calculated by the calculating means.

Control apparatus, resource allocation method and program

A communication band calculation device includes a memory; and a processor configured to execute acquiring user-based traffic information; defining non-overlapping separate section columns having any section width as a state space and sets a user distribution of a traffic amount according to the state space based on the traffic information; generating a transition probability matrix in which a transition probability that a transition from a separate section to another in the state space occurs is set as an element based on the traffic information; obtaining prediction of the user distribution at a desired future time using a product of the user distribution which is a starting point of prediction and the transition probability matrix; and calculating an amount of band facilities required to achieve quality of a communication service at a future point in time based on the user distribution in future.

Communication band calculation device, communication band calculation method, and medium

An estimation device includes: a collection unit configured to collect first information that has correlation with a display time of a web page from devices transmitting data in a network; a conversion unit configured to convert the first information into second information per unit time of each area including one of the devices; and a calculation unit configured to calculate an estimated value of the display time in each area in the unit time based on the second information and characteristics of the display time with regard to the first information. Thus, a display time of a web page is estimated from information which can be measured in a network.

Estimation apparatus, estimation method and program

An object is to provide possible web quality estimation for changes in network quality without simulating each combination of network qualities or acquiring operation log information in advance. One aspect of the present invention is a web quality estimation device that estimates web quality which is a processing time of a web content, based on input of a content identifier of the web content and one or more network qualities, and includes: a content characteristic storage unit that stores correspondence information between a content identifier for identifying a web content and one or more content characteristics for a plurality of web contents; and a web quality estimation unit that receives input of a content identifier and one or more network qualities, refers to the corresponding information to acquire one or more content characteristics corresponding to the input content identifier, and estimates web quality from the one or more content characteristics and the input one or more network qualities.

Web quality estimation apparatus and program

A quality estimation apparatus includes an acquisition unit for acquiring a set of web page loading latencies, and a calculation unit for calculating a probability that a quality of experience value is a predetermined value or more for each latency in the set, as a probability that the quality of experience value is the predetermined value or more for the set, and enables estimation of the user experience quality for the set of web page loading latencies.

Quality estimation apparatus, quality estimation method and program

A sensor registration method according to one aspect of the present invention includes generating association information associating port information with sensor information, the port information identifying a connection port of a first communication device to which a sensor is connected, the sensor information including a type of the sensor, converting the association information to have a predetermined format, transmitting the converted association information to an information processing device configured to process data obtained from the sensor, and registering the sensor in the information processing device by storing the converted association information into the information processing device.

Sensor registration method, sensor registration system, and relay device

A user experienced quality estimation apparatus estimating a user experienced waiting time of an application in an user terminal, includes: a computer configured to: obtain, as estimation target logs, a duration time of each process of data obtaining, script execution and screen rendering performed in an estimation target period in the user terminal, and to store the estimation target logs in a received log storage unit; read out the estimation target logs from the received log storage unit, and output logs, excluding logs having data duration time shorter than a predetermined short time process threshold or longer than a predetermined long time process threshold; calculate, as multiplicity, the number of processes in a timeslot of a constant time length for the output logs; and extract a continuous region from data quantized by the quantization unit.

User experienced quality estimation apparatus, terminal bottleneck determination apparatus, similar operation extraction apparatus, method and program

A content playback information estimation apparatus, for estimating a state on playback of content, that is provided between a distribution server and a terminal in a system in which the distribution server distributes the content to the terminal via a network and the terminal plays the content, the content playback information estimation apparatus including: a unit configured to obtain packet data distributed from the distribution server to the terminal and to store the packet data in a storage unit; a unit configured to estimate a data amount in a buffer of the terminal based on obtained packet data; and a unit configured to estimate a state on playback at each time of the content in the terminal by comparing the estimated data amount with a predetermined threshold.

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Musashino, Japan

Daisuke Ikegami