Mobile network and communication method thereof

摘要

A gateway (GW) and a plurality of foreign agents (FA) are connected in a ring-like manner, and the procedures of (1) the GW receiving an IP packet, addressed from a corresponding node CN to a mobile node MNa; (2) the GW transferring the packet to a link L 1 in one direction; (3) an FA 1 transferring the received packet to a link L 2 in the same direction; (4) FA 1 furthermore transferring the received packet to a link L 4 , connected to MNa, if the destination address of the received packet is already registered in the visitor list; (5) an FA 2 transferring the received packet to a link L 3 in the same direction; (6) FA 2 furthermore ending the process as it is if the destination address of the received packet is not registered; and (7) the GW discarding the received packet.