Nippon Telegraph and Telephone Corporation

Akihiro Okada

Katsuma Miyamoto

Hideo Tsuchiya

Akihiro Kimura

Shinya Kawano

Shunsuke Homma

Hideaki Iwata

Hiroaki Sato

A communication system () includes a terminal information acquisition unit configured to acquire version information of an OS of a terminal (), a comparison unit configured to compare a version of the OS of the terminal () acquired by the terminal information acquisition unit with a latest version of the corresponding OS, and a setting unit configured to set, when the version of the OS of the terminal () is not the latest version, a path along which traffic of the terminal () passes through a security appliance (), and set, when the version of the OS of the terminal () is the latest version, a path along which the traffic of the terminal () does not pass through the security appliance ().

Communication system and communication method

An application information storage unit configured to store information obtained by associating application information including flow characteristics of an application of a flow constituted by a packet with a flow identifier for identifying the flow of the packet, an acquisition unit configured to acquire, in a case where an input port receives a packet, application information of a flow constituted by the packet from the application information storage unit, and an output unit configured to output the packet received by the input port to a packet transfer apparatus in a load state indicating that a load due to the flow of the flow characteristics is light among a plurality of packet transfer apparatuses according to the flow characteristics included in the application information acquired by the acquisition unit are provided.

Load distribution system and load distribution method

A storage unit configured to store information regarding flow characteristics indicating whether a flow constituted by a packet is a flow having a tendency to have a large number of short packets or a flow having a tendency to have a large number of long packets in association with destination information of the packet, a determination unit configured to, in a case where an input port receives a packet, determine flow characteristics of a flow constituted by the packet on the basis of the storage unit, and an output unit configured to output the packet received by the input port to a packet transfer apparatus in a load state indicating that a load due to the flow of the flow characteristics is light among a plurality of packet transfer apparatuses according to the flow characteristics determined by the determination unit are provided.

An acquisition unit acquires a state of a server including pieces of virtual CPE, and an instructing unit instructs CPE connected to the virtual CPE to control a communication band based on the state of the server. The instructing unit instructs the CPE to limit a communication band to a predetermined value or less based on a CPU usage rate acquired by the acquisition unit exceeding a predetermined threshold value. The instructing unit instructs the CPE to limit a communication band to a predetermined value or less in based on the number of connections of the CPE acquired by the acquisition unit being less than a predetermined threshold value. The acquisition unit acquires presence or absence of CPE not connected to the virtual CPE, and the instructing unit instructs the CPE to block communication based on the presence of CPE not connected to the virtual CPE.

Management device and management method

A function management device that manages, in a communication system including a plurality of pieces of customer premises communication equipment and a server capable of providing a function to the plurality of pieces of customer premises communication equipment, the function provided by the server, and includes a resource management unit configured to collect resource information from the plurality of pieces of customer premises communication equipment, a network management unit configured to collect, from the server, network band information of each of the functions, the network band being between the plurality of pieces of customer premises communication equipment and the server, and a function processing unit configured to activate a virtual machine on one of the plurality of pieces of customer premises communication equipment on the basis of the resource information and the network band information to cause a first function selected on the basis of a band occupancy ratio from among the functions provided by the server to be executed.

Function management apparatus, function management method and communication system

In a communication system including first virtual CPE and second virtual CPE, the first virtual CPE includes a band acquisition unit configured to acquire a first contract band set for a subscriber under control of the first CPE and acquire a value of decrease in the first contract band when at least one subscriber terminal of the subscriber transitions from being under control of the first CPE to being under control of the second CPE, and a band control unit configured to control a communication band for the first CPE, and the second virtual CPE includes a band acquisition unit configured to acquire a second contract band set for a subscriber under control of the second CPE and acquire a value of increase in the second contract band, and a band control unit configured to control a communication band for the second CPE.

Communication system and bandwidth control method

A communication apparatus connected to a virtual apparatus having an address dispensing function via an access network is provided, wherein the communication apparatus includes a communication confirmation unit configured to perform a communication confirmation between the virtual apparatus and the communication apparatus; and an address dispensing unit configured to dispense an address to a user terminal under control of the communication apparatus when communication between the virtual apparatus and the communication apparatus is not able to be confirmed by the communication confirmation unit, and the address dispensing unit causes the user terminal to forcibly release the address when the communication between the virtual apparatus and the communication apparatus is able to be confirmed by the communication confirmation unit.

Communication apparatus, communication method and program

In a communication system including a first virtual CPE to which a terminal belongs, a second virtual CPE, and an authentication server, when the terminal connects to the second virtual CPE, the second virtual CPE confirms whether terminal information of the terminal is registered in the authentication server, and when the terminal information is registered in the authentication server, the authentication server notifies the second virtual CPE of an address of the first virtual CPE, and the second virtual CPE performs a tunnel connection to the first virtual CPE.

Communication system and communication method using virtual customer premise equipment

A load distribution system has: determination means for determining, upon an input port receiving a packet, a flow attribute indicating whether a flow configured by the packet is a flow that tends to include many long packets or a flow that tends to include many short packets; and output means for outputting the packet to a packet transfer device in a load state indicating that a load applied by the flow of the flow attribute is low, of a plurality of packet transfer devices, in accordance with the flow attribute determined by the determination means.

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Tokyo, Japan

Akihiro Okada