| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit disconnection of a session via a portable network connection device when the portable network connection device is moved from a network to which a gateway unit belongs to other network, and vice versa. <P>SOLUTION: The network system comprises: a portable network connection device; and a gateway unit. In the gateway unit, when a fact that there is a portable network connection device in a second network not including a tunnel route as a transfer ruote of a packet addressed to a client from a third network not including a tunnel route is detected, a route from the third network to the second network is determined, and when a fact that there is no portable network connection device in a second network is detected, a route from the third network to the first network including a tunnel route is determined. <P>COPYRIGHT: (C)2013,JPO&INPIT |
