Worst-Case Latency Analysis for AVB Traffic under Overlapping-Based Time-Triggered Windows in Time-Sensitive Networks

Deterministic and low end-to-end latency communication is an urgent demand for many safety-critical applications such as autonomous vehicles automated industries. The time-sensitive network (TSN) introduced Ethernet-based amendments in IEEE 802.1 TSN standards to support time-triggered (TT) traffic these applications. In the presence of TT flows, designed integrate Audio/Video Bridging (AVB) Best Effort (BE) types. Although AVB has a lower priority than TT, it still requires deterministic performance, which may not be guaranteed under strict predefined scheduling constraints. For this reason, window-overlapping algorithm recently proposed different works analytical forms overlapping-windows based. But worst-case evaluation overlapped windows also essential critical optimizations tradeoffs. paper, delay ( WCD ) overlapping-based (AVB-OBTTW) proposed. Separate models are derived using calculus (NC) approach AVB-OBTTW with both non-preemption preemption mechanisms. Using actual vehicular use case, evaluated back-to-back porosity configurations light heavy loading scenarios. specific credit bounds, clear reduction been achieved by increasing overlapping ratio xmlns:xlink="http://www.w3.org/1999/xlink">OR ), especially configuration. Preemption modes compared conditions, resulting s mode non-preemption, style. Compared latest related works, reduces bounds increases unscheduled bandwidth, leading highest enhancements maximum allowable .