Predictable and reliable time triggered platform for Ambient Assisted Living

Today´s Ambient Assisted Living (AAL) architectures do not support the real-time and reliability requirements of medical monitoring and closed-loop control applications. Fault-tolerant embedded system architectures, on the other hand, do not address the openness required for the dynamic integration of AAL components. This paper present an AAL architecture based on Time-Triggered Ethernet with support for openness, real-time support and reliability. The starting point is a static allocation of communication slots to end-systems. Based on this static schedule, we perform a dynamic allocation of communication resources to the components within an end-system. Each end-system can host multiple components and the communication of these components is dynamically mapped to parts of the end-system´s slot. For this purpose, admission control and resource management services are introduced that ensure temporal and spatial partitioning within end-systems. The architecture is evaluated in a simulation environment based on a medical use case.