Nippon Telegraph and Telephone Corporation

Hidetaka Nishihara

Hiroki Iwahashi

Kaori Kurita

Kazuhiro Matsuo

Toru Okugawa

Shunsuke Homma

Hideaki Iwata

Aki Fukuoka

Shinya Arita

Takuya Sato

Takayuki Nakamura

Koji Sugisono

Tomohiro Okada

A slice gateway connects one or more subslices in a network in which an E2E slice is made up of multiple subslices. The slice gateway receives an inspection packet, determines an output destination subslice of the inspection packet based on a distribution table, embeds an ID of the output destination subslice in a payload of the inspection packet, and outputs the packet that includes the embedded ID to the output destination subslice; and notifies a quality tabulation device of information regarding the inspection packet.

Slice gateway, quality calculation apparatus, inspection packet processing method and program

A communication control apparatus configured to control bands for flows monitors the amount of communication of each of the flows input to the communication line in a predetermined monitoring period. When a sum of the amounts of communication of the flows acquired by the monitoring exceeds a predetermined threshold, the communication control apparatus restricts the communication bands for the top N flows in the descending order of the amount of communication input to the communication line, according to the amounts of communication of the flows. In contrast, the communication control apparatus does not restrict the communication bands for flows lower than the top N flows.

Communication control device and communication control method

A policy control device includes an acquisition unit configured to acquire an amount of communication of an accommodated user terminal from a relay device that notifies the amount of communication when the amount of communication exceeds a communication amount threshold value, a calculation unit configured to calculate a communication speed by using an amount of communication in a past fixed period of time including at least the amount of communication currently acquired by the acquisition unit, and calculate the communication amount threshold value based on the calculated communication speed, and a notification unit configured to notify the relay device of the communication amount threshold value calculated by the calculation unit.

Control device and control method

A resource conflict arbitration apparatus that arbitrates a conflict between resources includes: reception means configured to receive a request for resource allocation to a device among one or more devices; determination means configured to determine, when a resource requested by the resource allocation request is to be allocated to the device, whether a summed value of resources allocated to the one or more devices exceeds an upper limit value of available resources; and calculation means configured to determine, when it is determined by the determination means that the summed value exceeds the upper limit value, a status of resource allocation to each device to maximize a sum of priorities of resource allocation to the one or more devices under a constraint condition that a summed value of resources allocated to the devices does not exceed the upper limit value.

Resource contention arbitration apparatus, resource contention arbitration method and program

A communication control apparatus authenticates a user based on an authentication request transmitted from virtual Customer Premise Equipment (CPE) in response to a request of the user who accesses the virtual network. The communication control apparatus refers to information, held by an operation management system of a service operator, about the user of the virtual network. The communication control apparatus refers to information, collected by a collector, about a network slice constructed in the virtual network. The communication control apparatus selects a network slice through which data flow of the user. The communication control apparatus notifies the virtual CPE of the selected network slice.

Communication control device, communication control system, communication control method, and communication control program

A policy and charging rules function (PCRF) stores a policy rule management table in which a policy rule corresponding to a combination of contract information and a device type is registered and a hierarchical management table in which user information including contract information of a user and information on the device are managed in association with each other, acquires the device type serving as an application target of the policy rule, and a device ID assigned to the device, determines the policy rule according to the acquired device type and the contract information of the user, and instructs a deep packet inspection (DPI) to apply the determined policy rule to the device corresponding to the acquired device ID. The DPI acquires the device ID, and applies the policy rule to communication from the device corresponding to a device ID assigned to the device, and performs control.

Communication system and policy control device

A PCRF () stores a policy rule management table in which a policy rule is associated with a device type, acquires the device type serving as an application target of the policy rule, and a device ID assigned to the device, determines the policy rule corresponding to the acquired type of the device (), and instructs the DPI to apply the determined policy rule to the device corresponding to the acquired device ID. The DPI () acquires the device ID assigned to the device serving as the application target of the policy rule, applies the policy rule provided through the instruction to communication from the device () corresponding to the device ID assigned to the device to which the PCRF () instructs to apply the determined rule, and performs control.

Communication system and policy control apparatus

A storage unit () stores a terminal identifier for identifying a terminal, locator information indicating a transfer node to which a terminal is connected, a candidate terminal identifier for identifying a candidate terminal that is a communication destination candidate of the terminal, and candidate locator information indicating a transfer node to which the candidate terminal is connected in association with each other. An acquisition unit () acquires, from a transfer node to which a terminal is newly connected, mapping information in which a locator information indicating the transfer node and a terminal identifier of the terminal are associated and stores the mapping information in the storage unit (). A notification unit () notifies the transfer node to which the terminal is newly connected of the candidate terminal identifier and the candidate locator information stored in association with the terminal identifier that is acquired in the storage unit ().

Notification device and notification method

In a measurement system including a first transfer apparatus provided at a packet receiving edge of one network, a second transfer apparatus provided at a packet sending edge of the one network, and a measurement apparatus configured to receive a packet, the first transfer apparatus adds received time of the packet to the packet and transmits the packet, the second transfer apparatus receives the packet, adds sending time and a signature specific to the one network to the packet, and transmits the packet to which the received time, the sending time, and the signature are added, and the measurement apparatus receives the packet, and calculates a difference between the sending time and the received time to measure latency in the one network.

Measurement system and measurement method

A communication control device specifies the top N flows in descending order of communication amounts input to a communication line as flows that are communication band limit targets, and limits a communication band of a group of flows that are the communication band limit targets to a predetermined limited band so that a sum of communication amounts of the flows input to the communication line is equal to or smaller than a predetermined line capacity. Here, the communication control device determines a value of N so that a limited band is equal to or larger than a communication amount of a flow having the largest communication amount in a group of flows that are not the communication band limit targets and is equal to or smaller than a communication amount of a flow having the smallest communication amount in the group of flows that are the communication band limit target.

Communication control apparatus, and communication control method

A policy conflict system includes a determining unit that determines, according to an instruction for application of a second polity from a second network provider to a first network provider that performs policy control based on a set of first policies, presence or absence of a third policy conflicting with the second policy, a calculating unit that, when the determining unit determines that the third policy is present, concerning each of the second policy and the third policy, calculates priority levels different from each other referring to a storing unit storing information indicating a target that should be prioritized concerning an item relating to a policy, and an imparting unit that imparts the priority levels calculated by the calculating unit to each of the second policy and the third policy. Consequently, the policy conflict resolution system enables a conflict between policies to be resolved.

Policy conflict resolving system and policy conflict resolving method

A policy conflict detection system includes a determination unit configured to determine, in response to an instruction to apply to a first network operator which performs policy control based on a set of first policies, a second policy from a second network operator, whether a third policy, which matches the second policy in terms of a priority, an application period, a control target, and a control condition and which has a control content exclusive of that of the second policy is present among the first policies, thereby enabling detection of conflict of the policies.

Policy conflict detection system and policy conflict detection method

There is provided a communication system for controlling a slice including a plurality of subslices. The system includes a temporary configuration unit configured to temporarily configure, for each subslice, a target value related to a service requirement, a measurement unit configured to acquire, in each subslice, a measurement value related to the service requirement for each QoS class and measure a margin, with respect to the target value, of the measurement value, a sharing unit configured to share the margin among the plurality of subslices, and an adjustment unit configured to smooth the margin among the plurality of subslices while satisfying the service requirement for the slice and configure, for each subslice, the target value and the QoS class corresponding to the margin after smoothing.

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Tokyo, Japan

Hidetaka Nishihara