Cornel Pampu

POLICY BASED MOBILE IP HANDOFF DECISION (POLIMAND) USING GENERIC LINK LAYER INFORMATION

There is currently a large variety of heterogeneous wireless access networks and cellular systems available, capable of providing data services. However, such systems require that users remain connected to a same network or terminate all communications when changing the point of attachment during handoff to another network or access technique. This paper describes link layer parameters which can be used to control Mobile IP (MIP) handoffs for seamless mobility. Based on a predefined Generic Link Layer (GLL) Mobile IP handoffs can be forced and can be used by different MIP systems, such as Hierarchical Mobile IP (HMIP) and Fast Mobile IP (FMIP). This paper describes a first implementation of a policy based Mobile IP handoff decision (POLIMAND) which uses link layer parameters for MIP handoff decisions.

Mobile IPv6 ad hoc gateway with handover optimization

The future demand of mobile Internet access in vehicles like busses or trains leads to an integration of ad hoc networks for an efficient and infrastructure-less multihop communication between mobile users. However, for wireless and mobile Internet access an infrastructure is needed which has to support mobility for ubiquitous wireless access. Mobile IPv6 allows mobility support also in combination with ad hoc, e.g., with AODVv6 (ad hoc on-demand distance vector) in future wireless networks. This study outlines the interworking of the mobility protocol mobile IPv6 and the multihop ad hoc routing protocol AODVv6. The integration leads to a mobile IPv6 ad hoc gateway that contains an optimization for vertical handovers between WLAN systems and cellular networks. The optimization is based on link layer information that is used to reduce packet loss during vertical handovers

IPonAir – Drahtloses Internet der nächsten Generation

Das BMB+F Projekt ‚IPonAir – Drahtloses Internet der nächsten Generation‘ [1] hat im Oktober 2001 begonnen. Koordiniert wird das Projekt von Prof. Dr. M. Zitterbart vom Institut für Telematik der Universität Karlsruhe (TH). Partner aus der Industrie sind Alcatel, Ericsson Eurolab Deutschland GmbH Aachen, T-Systems Nova, Lucent, NEC Europe Ltd., Nokia sowie Siemens. Als Hochschulen sind die Universitäten Karlsruhe (Koordination), Aachen, Berlin, München, Bonn, Bremen, Essen, Kassel, Frankfurt und die FH Friedberg vertreten. Dieser Artikel gibt einen Überblick über einige der im Rahmen des Projektes durchgeführten Arbeiten zu mobilen Ad-hoc-Netzen.