| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To optimize traffic without increasing facility costs of a physical network by autonomously dividing or moving virtual hubs constituting a virtual network. <P>SOLUTION: A network virtualization apparatus 21 constructing a virtual network A on the physical network, ie equipped with a data exchange node 18 which manages connections of terminals 17. The data exchange node is equipped with: a table 182 for storing information of mapping between the connections of the terminals on the physical network and an address of the virtual network; a means 186 for establishing and holding the connections with the terminals; a means 186 for establishing and holding connections with other data exchange nodes 18a included in another network virtualization apparatuses 21a; a means 186 for establishing and holding a connection with a corresponding terminal; and a means which cancels any one of the held connections when a cancellation criterion is exceeded, and causes another data exchange node to hold the canceled connection. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
