Hitachi, Ltd.

Hitachi Software Engineering Company, Ltd.

Hironari Sakai

Michio Suzuki

Atsushi Kimoto

Masashi Ikeda

An inter-network routing control method for selecting the optimum gate station in a packet network connected to another network via a plurality of gate stations. A representative gate station can be specified for each addressed network. Upon an inter-network switching call request, the switch station transfers the call request to a representative gate station, and the representative gate station decides the optimum gate station. It is possible to lighten the load on the switch station at the time of inter-network switching communication and facilitates changing the configuration of gate stations in the packet network.

Inter-network routing control method and switching network system

In a packet switching network, in order to transmit a packet effectively, after transmission of a first packet from a source node to a destination node, a data for inhibiting a packet from being repeating to a specific trunk line from a node is set in a routing table associated with the node in accordance with a second packet received from the node. The associated routing table stores trunk lines for repeating in accordance with the destination node of the packet. The second packet represents occurrence of trouble on a transmission route for the first packet from the source node to the destination node. The transmission node includes the trunk line from the node. When the node has received a third packet directed to the destination node, the associated routing table is referred to determine a trunk line for repeating the third packet from trunk lines except for the specific trunk line in accordance with the destination node and the repeating inhibition data.

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Yamato, Japan

Hironari Sakai