Nippon Telegraph and Telephone Corporation

Yuki Sakaue

Tatsuya Fukui

Katsuya Minami

Ryota Shiina

Hiroyuki Furukawa

An object is to provide a network management system and the like capable of being introduced into an existing network to ascertain an instantaneous traffic variation in the network. The scheme of the present invention uses a shaping function included by each edge apparatus. The shaping function controls packet transmission in a millisecond order. The network management apparatus according to the present invention adds up the amount of transmitted packets for each control period reported by each edge apparatus and estimates this as an instantaneous traffic amount in the network. In the scheme, it is only necessary to add one network management apparatus to an existing network and to cause each edge apparatus to report the amount of transmitted packet to the network management apparatus.

Network management systems, edge devices, network management devices, and programs

The present disclosure aims to enable a total of 127 or more USB devices to be connected on the same network regardless of connection sites. A USB connection control system of the present disclosure is a USB connection control system including a plurality of USB-network conversion devices and a management device being connected to each other via a network, in which the management device holds, per user, connection information defining a connection destination of a USB device connected to the USB-network conversion device, and at least one of the plurality of USB-network conversion devices receives, from the management device, the connection information corresponding to identification information unique to the at least one of the plurality of USB-network conversion devices and communicates with a to-be-connected USB-network conversion device based on the received connection information, and to establish connection with a USB device that is connected to the to-be-connected USB-network conversion device.

USB connection control system, USB connection control method, USB-network conversion device and program

An object is to provide a communication apparatus, a communication method, and a program capable of avoiding an increase in network load when input traffic continues to be large and a communication delay when input traffic is very small. A communication apparatus according to the present invention prepares three token buckets and can transfer, discard, or hold a packet in accordance with the amount of tokens in each token bucket. This enables the communication apparatus to operate so as not to exceed a set maximum bandwidth when large traffic is received for the delay guarantee shaping. Further, When the maximum bandwidth is exceeded, the communication apparatus can select whether to discard a packet to prioritize a delay guarantee or to hold a packet to prioritize no loss of packets. Furthermore, the communication apparatus can immediately transmit a packet without increasing a communication delay when input traffic is very small.

Growing community of inventors

Musashino, Japan

Yuki Sakaue