Logo des Repositoriums

Auflistung nach Autor:in "Wietzke, Joachim"

1 - 3 von 3
  • mensch und computer 2013 - workshopband
    Compositing User Interfaces in Partitioned In-Vehicle Infotainment
    (Mensch & Computer 2013 - Workshopband, 2013) Knirsch, Andreas; Theis, Andreas; Wietzke, Joachim; Moore, Ronald
    Automotive information and entertainment systems have become an integral part of a car's humanmachine interface and already affect a prospective customer's purchase decision. In-Vehicle Infotainment systems combine an increasing number of software-based functionalities of varying importance and purpose on a shared hardware platform. This led to integrated modular architectures to achieve temporal isolation of different classes of applications, developed independently by multiple suppliers. Despite this partitioning on the software level, the user interface has to provide all functionality in a uniform way, blended into the manufacturer's superordinate usage concept. Furthermore, allocation and presentation of graphical content has to respect the car's operating state along with the user's preferences and system interaction. In the following, an approach is presented that enables the integration of segregated and independently rendered graphics into a uniform graphical user interface, while considering a multi-display environment and flexible allocation of different views. Relevant requirements, a prospective architecture, and a prototypical implementation are presented to foster the provisioning of the required computational and graphical power to enable future In-Vehicle Infotainment systems.
  • Konferenzbeitrag
    Contradiction of Separation through Virtualization and Intercommunication
    (Mensch und Computer 2015 – Workshopband, 2015) Holstein, Tobias; Wietzke, Joachim
  • Konferenzbeitrag
    Resource management for multicore aware software architectures of in-car multimedia systems
    (INFORMATIK 2011 – Informatik schafft Communities, 2011) Knirsch, Andreas; Wietzke, Joachim; Moore, Ronald; Dowland, Paul S.
    With increasing hardware capabilities the demands on the functionality of user centric systems continuously expand. The next generation of automotive embedded systems is going to make use of multicore hardware architectures, which strongly enhances the computational power. This means a movement from concurrent to parallel computing. Although the competition for CPU time will decrease, other resources are not available in multiple instances. This raises the need for a management unit that controls access to resources other than the CPUs. Such a resource manager is able to utilise the capabilities of multicore hardware architectures for component based software systems more predictably. This paper builds a case for a resource scheduler, identifies requirements and provides details of a prototype implementation. As an illustrative example, the domain of automotive multimedia/infotainment systems is used.