Nexus - An Open Global Infrastructure for Spatial-Aware Applications

Due to the lack of a generic platform for location- and spatial-aware systems, many basic services have to be reimplemented in each application that uses spatial-awareness. A cooperation among different applications is also difficult to achieve without a common platform. In this paper we present a platform that solves these problems. It provides an infrastructure that is based on computer models of regions of the physical world, which are augmented by virtual objects. We show how virtual objects make the integration of existing information systems and services in spatial-aware systems easier. Furthermore, our platform supports interactions between the computer models and the real world and integrates single models in a global "Augmented World". Contents 1 Introduction 3 2 General Idea 4 2.1 Augmented Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Augmented World . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Example Scenario 6 4 Require..

Modeling computer networks for emulation

provides a configurable network environment for the performance analysis of distributed applications and protocols. An emulation scenario consists of a network topology, link parameters, and dynamic change models. In order to set up a scenario automatically, it has to be modeled in an appropriate description language. In this paper, we analyze the requirements for an emulation scenario description language and propos