The MobyDick Project: A Mobile Heterogeneous All-IP Architecture

Proceedings of Advanced Technologies, Applications and Market Strategies for 3G (ATAMS 2001). Cracow, Poland: 17-20 June, 2001.This paper presents the current stage of an IP-based architecture for heterogeneous environments, covering UMTS-like W-CDMA wireless access technology, wireless and wired LANs, that is being developed under the aegis of the IST Moby Dick project. This architecture treats all transmission capabilities as basic physical and data-link layers, and attempts to replace all higher-level tasks by IP-based strategies. The proposed architecture incorporates aspects of mobile-IPv6, fast handover, AAA-control, and Quality of Service. The architecture allows for an optimised control on the radio link layer resources. The Moby dick architecture is currently under refinement for implementation on field trials. The services planned for trials are data transfer and voice-over-IP.Publicad

The Baltic Sea Chart Datum 2000 (BSCD2000): Implementation of a common reference level in the Baltic Sea

The Baltic Sea Chart Datum 2000 (BSCD2000) is a geodetic reference system adopted for Baltic Sea hydrographic surveying, hydrographic engineering, nautical charts, navigational publications and water level information. It is based on the common geodetic standards for the height system (EVRS) and the spatial reference system (ETRS89) in Europe. In particular, the zero level of BSCD2000 is in accordance with the Normaal Amsterdams Peil (NAP). BSCD2000 is about to be adopted as unified chart datum by all the countries around the Baltic Sea. It agrees with most national height realizations used on land. BSCD2000 will facilitate effective use of GNSS methods like GPS, GLONASS and Galileo for accurate navigation and hydrographic surveying in the future.El Dátum 2000 de la Carta del Mar Báltico (BSCD2000) es un sistema dereferencia geodésico adoptado para los levantamientos hidrográficos del MarBáltico, la ingeniería hidrográfica, las cartas náuticas, las publicaciones náuticas yla información sobre el nivel del mar. Se basa en las normas geodésicas comunespara el sistema de alturas (EVRS) y en el sistema de referencias espaciales(ETRS89) en Europa. En particular, el nivel cero del BSCD2000 está en consonanciacon el Normaal Amsterdams Peil (NAP). El BSCD2000 está a punto de seradoptado como datum de cartas unificado por todos los países que rodean el MarBáltico. Concuerda con la mayoría de las realizaciones de alturas nacionalesutilizadas en tierra. El BSCD2000 facilitará el uso efectivo de los métodos GNSScomo el GPS, GLONASS y Galileo para la navegación precisa y los levantamientoshidrográficos en el futuro.Le Baltic Sea Chart Datum 2000 (BSCD2000) est un système de référencegéodésique adopté pour les levés hydrographiques, l’ingénierie hydrographique,les cartes marines, les publications nautiques et les informations sur le niveau del’eau de la mer Baltique. Il est basé sur les normes géodésiques communes auSystème de Référence Vertical Européen (EVRS) et au Système de RéférenceTerrestre Européen (ETRS89). En particulier, le zéro hydrographique duBSCD2000 est conforme au Normaal Amsterdams Peil (NAP). Le BSCD2000 estsur le point d’être adopté en tant que niveau de référence des cartes commun parl’ensemble des pays bordant la mer Baltique. Il correspond à la plupart desmesures de hauteur nationales utilisées à terre. Le BSCD2000 facilitera l’utilisationefficace des méthodes du GNSS comme le GPS, GLONASS et Galileo pour unenavigation et des levés hydrographiques précis à l’avenir

Mobility Support for a Future Communication Architecture

3rd Generation networks as proposed by 3GPP claim to follow the path towards fixed-mobile convergence and full support of Internet services. Although the providers have obviously recognised the dynamics of the Internet, their attempt to provide IP-services over the system has led to a circuit switched architecture. This forthcoming infrastructure will be a sophisticated, complicated, and quite expensive network, with some IP-equipment in the middle (core-network). From an IETF-biased engineers view, some parts of this network and protocols could be dropped, except that they are probably needed for backward compatibility. But since backward compatibility and saving of investment is a major concern of the standardising bodies, the evolving architectures carry a big burden

TCP Performance Under Mobile IP Handoffs - Survey and Performance Results

In this paper we examine the impact of multiple packet loss due to a Mobile IP handoff on the performance of TCP. When a mobile node performs a handoff, a sequence of packets sent to the mobile node can get lost due to the mobile node’s logical disconnection from the network during the handoff