A.G.: An overview of cellular ip

Recent initiatives to add mobility to the Internet and packet data services to third generation cellu-lar systems are being considered by emerging mo-bile service providers as possible candidate solu-tions for the delivery of IP data to mobile users. Both of these two candidates have a number of shortcomings, however. Mobile IP represents a simple and scalable global mobility solution but is not appropriate in support of fast and seam-less hando control. In contrast, third genera-tion cellular systems oer smooth mobility support but are built on complex networking infrastructure that lacks the exibility oered by IP-based solu-tions. In this paper we present an overview of Cel-lular IP which represents a `third way ' combining the strengths of both approaches without inherit-ing their weaknesses. Cellular IP combines the ca-pability of cellular networks to provide smooth fast hando and ecient location management of active and idle mobile users with the inherent exibility, robustness and scalability found in IP networks.