Hitachi, Ltd.

Kouichi Asao

Masao Nakayama

Yoshihiro Ashi

Takashi Seki

Takaaki Toyama

Ryo Nakamura

Yasuo Murakami

Daisuke Okabe

Taichi Hiramatsu

Shuuichi Maruyama

Kenichirou Tomizawa

An ATM network for synchronously perform a path connection control at a plurality of nodes, wherein path control data are preliminarily supplied to the nodes from a network management system before a designated operation time. Each node generates a current time synchronously with a network synchronous clock, selects path control data by comparing the designated operation time of the control data with the current time, and autonomously executes a path connection control in accordance with the selected path control data.

Communication network system and method for synchronously controlling path connection

In a communication node apparatus comprising a plurality of line interfaces each having a cache memory with a sub routing table formed therein, and a route management unit having a main routing table, each of the line interfaces is provided with a function of detecting a disconnection flag included in a received packet and deleting an unnecessary routing information entry from the sub routing table, and a function of registering a routing information entry as a high priority entry if a connection establishment flag is set to a received packet when the routing information entry is downloaded from the main routing table to the sub routing table upon reception of the packet.

Communication node apparatus with routing tables in cache memories

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Yokohama, Japan

Kouichi Asao