Establishing a bi-directional IP-tunnel in a mobile IP communication system in case of private address conflicts

摘要

Apparatus, and an associated method, for facilitating routing of packet-formatted data in a packet radio communication system (10). When a mobile node (12) roams out of its home network (18) and into a foreign network (26), a foreign agent (32) determines whether the home IP address of the mobile node is a private IP address. If so, a determination is made as to whether a private address conflict exists with other mobile nodes. A UPA (unique private address) tunnel, is selectably formed between the mobile node and the foreign agent. And, a UDP/MIP (User Datagram Protocol/Mobile IP) tunnel is selectably formed between the foreign agent and a home agent. Problems otherwise associated with the private address conflict and NAT/NAPT (network address translations/network address port translation) device traversal are avoided.