| 摘要 |
PURPOSE: A simple IP virtual private network service method of PDSN(Packet Data Service Network) is provided to ensure a stable data transmission by forming a PDSN and a VPN(Virtual Private Network) when a user of a mobile terminal intends to connect to a server of a private network. CONSTITUTION: When a data call request is received from a mobile node, a PDSN delivers subscriber information to an AAA(Administration, Authorization and Authentication), and then the AAA transfers an address and a private IP pool of a VPN server corresponding to the call request to the PDSN(S61-S63). The PDSN installs a tunnel to the VPN server by using an IPSec and allocates one of private IP pools usable at the corresponding VPN server to the mobile node, thereby forming a data transmission path between the mobile node and the VPN server(S64,S65). A user connects to a firm's internal server inside the VPN server by using the mobile node(S66). |
