A study of VPN protocol over mobile communication network and its performance evaluation

摘要

In previous research, we studied a VPN protocol customized for remote access to corporate LAN over PDC, PDC-P, and PHS networks (Mobile VPN). Since IMT-2000 commercial service was started, it is expected that many users will use Mobile VPN over IMT-2000 network in order to access to corporate LAN. In this situation, we studied the problems about the compatibility between Mobile VPN and IMT-2000 network. At the result of this, we found two requirements for Mobile VPN, TCP parameter conversion and redundancy support. In this paper, we describe these requirements and propose our solutions, called secure TCP accelerator and VRRP. We describe new Mobile VPN implementation including these functions and evaluation result of this.