Zoltán Richard Turányi

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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 hando 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 the context of the research in the IST project BRAIN, an in-depth study of the problem of IP mobility within the access network was performed. Mobility management was broken down to individual issues, which were separately analysed. Requirements, design goals, and recommendations for an ideal solution were proposed. Various existing proposals were(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)
The IPv4+4 architecture presented in this paper provides an evolutionary approach to the extension of IPv4 address space. It builds on the existence of Network Address Translators (NATs) and private address realms. During and after the transition from IPv4 to IPv4+4 there is no need to change routers, only NATs and end-hosts. End-to-end address transparency(More)
We present an automatic application protocol signature generating framework for Deep Packet Inspection (DPI) techniques with performance evaluation. We propose to utilize algorithms from the field of bioinformatics. We also present preprocessing methods to accelerate our system. Moreover, we developed several postprocessing techniques to refine the accuracy(More)
Software-Defined Networking (SDN) promises the vision of more flexible and manageable networks, but requires certain level of programmability in the data plane. Current industry insight holds that programmable network processors are of lower performance than their hard-coded counterparts, such as Ethernet chips. This represents a roadblock to SDN adoption.(More)