Modeling of Ethernet AVB Networks for Worst-Case Timing Analysis

Improved formal worst-case timing analysis of weighted round robin scheduling for Ethernet

“…First, we map the Ethernet components to a CPA model in order to apply CPA [9]. This mapping has been described in detail by the work presented in [5], [6], and [18], so we will only present a brief overview. A traffic source, i.e.…”

“…Analyses of Ethernet AVB are presented in [10], [5] and [6], where the first study only derived per-class timing properties, instead of deriving timing properties per stream, as done by the latter two. It has been shown in [6] that the end-to-end latency of higher priority traffic classes suffers heavily from AVB's traffic shaper implementation.…”

Formal timing analysis of CAN-to-Ethernet gateway strategies in automotive networks

“…Each output port, as a point of arbitration, is modeled as a resource. We assume that all other switch delays can be modeled by constant delays Diemer et al (2012b). Software tasks are shown as white tasks.…”

“…Most physical resources are directly modeled as CPA resources (rectangles with black name tags). An exception is the Ethernet switch, which is modeled as described by Diemer et al (2012b). Each output port, as a point of arbitration, is modeled as a resource.…”

“…The period ranges have been chosen to match (rounded down/up to the nearest 10 µs) the minimum/maximum periods of each group's traffic streams. For a given mapping, the Ethernet frame size can be computed as described by Diemer et al (2012b). We also selected some of the CAN frames to be trigger frames.…”