Fujitsu Corporation

Yuichiro Katsura

Yasuyuki Mitsumori

Tetsuo Ehara

Yasushi Kurokawa

Koji Hachiya

Kouichirou Amemiya

Kanta Yamamoto

Kei Hamada

Eitatsu Yoshida

Junichi Kawaguchi

An apparatus controls a transmission interval of maintenance packets in a communication network. The apparatus calculates, within a first bandwidth available for the transmission and reception of packets, a second bandwidth that is free in the apparatus and usable for transmitting and receiving the maintenance packets for maintenance of the communication network. The apparatus determines a transmission interval of maintenance packets in accordance with the calculated second bandwidth and transmits the maintenance packets to another apparatus in the communication network at the determined transmission interval.

Apparatus and method for controlling a transmission interval of maintenance packets in a communication network

A disclosed apparatus is a message relay apparatus. This message relay apparatus includes: a receiver that receives a message to be transferred; a determination unit that determines whether or not the message relay apparatus can afford to perform a conversion processing, when performing the conversion processing for the message; a selection unit that selects another apparatus to which the conversion processing is requested based on stored information representing other apparatuses that can afford to perform the conversion processing, when the message relay apparatus cannot afford to perform the conversion processing; a requesting unit that requests the selected another apparatus to perform the conversion processing for the message, and receives the converted message from the selected another apparatus; and a transmission unit that transmits the received and converted message to a transfer destination.

Message relay apparatus and method

A communication apparatus is connected to a network and identifies a flow of a frame input thereto and outputs the frame to a port. The communication apparatus includes: a flow identifying unit that obtains a flow identifier of the flow to which the frame belongs, and that obtains, based on the flow identifier, a hash rule corresponding to the flow identifier; a transfer destination controller that obtains by calculation a hash value of the frame by making use of the hash rule obtained by the flow identifying unit and that decides on an output port for the frame based on combination of the flow identifier and the hash value; and a frame output unit that outputs the frame to the output port decided by the transfer destination controller.

Communication apparatus and frame transmission method

A packet processing apparatus includes a plurality of communication connecting unit each connected with a communication partner apparatus using one of a work path and a protection path, connecting unit for connecting, using a data bus, the plurality of communication connecting unit with one another; determination unit for, when a packet sent from the communication partner apparatus is received by one of the communication connecting unit, determining whether the packet is a maintenance packet that is used for monitoring a connection state with the communication partner apparatus; and transmitting unit for, when it is determined that the packet is a maintenance packet by the determination unit, transmitting the maintenance packet to the plurality of communication connecting unit using the data bus via the connecting unit.

Packet processing apparatus, interface unit and method thereof

An aspect of the embodiments related to a packet transmission apparatus includes a user identification unit for identifying the user of an input user flow upon input of the user flow containing communication packets and maintenance packets, a maintenance packet extraction unit for extracting the maintenance packets from the user flow of the user identified by the user identification unit, a maintenance packet output control unit for controlling the transparent output of the maintenance packets extracted by the maintenance packet extraction unit based on the monitor rate setting, and a control unit for monitoring and controlling the user flow of the particular user based on the maintenance packets of the user transparently output by the maintenance packet output control unit.

Growing community of inventors

Fukuoka, Japan

Yuichiro Katsura