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Wireless access to Internet services will become typical, rather than as it is today, the exception. Such a vision presents great demands on mobile networks. Mobile IP represents a simple and scalable global mobility solution but lacks support for fast handoo control and paging found in cellular telephony networks. In contrast, second and third generation(More)
We present a performance comparison of a number of key micro-mobility protocols that have been discussed in the IETF Mobile IP Working Group over the past several years. IP micro-mobility protocols complement Mobile IP by offering fast and seamless handoff control in limited geographical areas and IP paging in support of scalability and power conservation.(More)
The emergence of Bluetooth as a default radio interface allows handheld electronic devices to be rapidly interconnected into ad hoc networks. Bluetooth allows large numbers of piconets to form a scatternet using designated nodes that participate in multiple piconets. In this work we study the performance implications of forming scatternets from piconets.(More)
In our present work we model the maximum throughput of stationary ad hoc networks. The routing process we apply is ideal in the sense that it includes collision avoidance and transmits using shortest paths between random source-destination pairs. Our model not only confirms the <i>n</i><sup>-1/2</sup> decay of the throughput that was published earlier in(More)
We propose 4+4, a simple address extension architecture for Internet that provides an evolutionary approach to extending the existing IPv4 address space in comparison to more complex and disruptive approaches best exemplified by IPv6 deployment. The 4+4 architecture leverages the existence of Network Address Translators (NATs) and private address realms,(More)
— In this paper we consider an output port of an ATM switch, where cell streams belonging to different TCP and UDP sessions arrive. During congestion the switch applies Early Packet Discard in order to reduce bandwidth waste. In order to guarantee fairness in the sense that only misbehaving sources get affected by the packet drop mechanism and to ensure(More)
In this paper we introduce our concept of the requirements of an eecient admission control algorithm and propose new algorithms. Our methods need only aggregate traac measurements and simple FIFO scheduling. We take minimal assumptions on the pattern of the traac. Our framework deenes a family of measurement based admission control algorithms of which we(More)
This paper presents results from the Cellular IP Project at Columbia University on Internet micromobility. Cellular IP complement Mobile IP with support for fast, seamless and local handoff control, and IP paging. We discuss the design, implementation and evaluation of the Cellular IP protocol using simulation, analysis and experimentation. We report on the(More)