Application-layer mobility using SIP
ACM SIGMOBILE Mobile Computing and Communications Review
Integrating Wireless LAN and Cellular Data for the Enterprise
IEEE Internet Computing
MAR: a commuter router infrastructure for the mobile Internet
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Analysis of SIP-based mobility management in 4G wireless networks
Computer Communications
Design and analysis of SIP-based mobile VPN for real-time applications
IEEE Transactions on Wireless Communications
Mobile virtual private networking
FIS'2009 Proceedings of the Second Future internet conference on Future internet
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The advent of the mobile wireless Internet has created the need for seamless and secure communication over heterogeneous access networks such as IEEE 802,11, WCDMA, cdma2000, and GPRS. An enterprise user desires to be reachable while outside one's enterprise networks and requires minimum interruption while ensuring that the signaling and data traffic is not compromised during one's movement within the enterprise and between enterprise and external networks. We describe the design, implementation and performance of a Secure Universal Mobility (SUM) architecture. It uses standard protocols, such as SIP and Mobile IP, to support mobility and uses standard virtual private network (VPN) technologies (e.g., IPsec) to support security (authentication and encryption.) It uses pre-processing and make-before-break handoff techniques to achieve seamless mobility across heterogeneous radio systems. It separates the handlings of initial mobility management and user application signaling messages from user application traffic so that VPNs can be established only when needed, thus reducing the interruptions to users.