  In this paper, we propose an extension of the AFDX standard, incorporating a
TSN/BLS shaper, to homogenize the avionics communication architecture, and
enable the interconnection of different avionics domains with mixed-criticality
levels, e.g., legacy AFDX traffic, Flight Control and In-Flight Entertainment.
First, we present the main specifications of such a proposed solution. Then, we
detail the corresponding worst-case timing analysis, using the Network Calculus
framework, to infer real-time guarantees. Finally, we conduct the performance
analysis of such a proposal on a realistic AFDX configuration. Results show the
efficiency of the Extended AFDX standard to noticeably enhance the medium
priority level delay bounds, while respecting the higher priority level
constraints, in comparison with the legacy AFDX standard.
