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Design and analysis of SIP-based mobile VPN for real-time applications

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3 Author(s)
Zong-Hua Liu ; Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan. ; Jyh-Cheng Chen ; Tuan-Che Chen

Mobile virtual private network (MVPN) has been developed to secure mobile user's communication between untrusted external networks and protected private internal network. The IETF's solution, however, leads to some problems: where should we put the external home agent (HA), how could we trust the external HA, and overhead of three tunnels. In this paper, we propose an alternative SIP-based MVPN. Because the proposed architecture is based on SIP, the problems inherited from mobile IP are not problems in our architecture. In addition, there is no need to tunnel a packet three times as that in IETF MVPN. In this paper, we also propose analytical models to evaluate and compare the performance of the proposed SIP-based MVPN with the IETF MVPN. The results show that the proposed SIP-based MVPN can reduce packet delivery cost significantly. It is especially suitable for real-time applications.

Published in:

IEEE Transactions on Wireless Communications  (Volume:8 ,  Issue: 11 )