Enhancing Real-Time Network Design with WoPANets Decision-Support Tool

Addressing the increasing complexity of real-time networks, WoPANets offers a decision-support tool for designing networks with mixed-criticality data delivery, multi-hop communication, and heterogeneous architectures. By focusing on accurate timing verification and system-level performance analysis, designers can optimize network parameters to meet critical constraints efficiently. Integrating communication network design with SW/HW partitioning enhances overall system performance.

• Real-Time Networks
• Decision-Support Tool
• System Performance Analysis
• Timing Verification
• Network Design

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1. WoPANets: Decision-support Tool for real-time Networks Design Ahlem Mifdaoui 09-06-2016 Innovation IT Day

2. Context & Motivations Increasing complexity of real-time networks: Mixed-criticality data delivery Multi-hop real-time communication Heterogeneous architecture Large-scale networks Cyclic dependencies at the communication level Deterministic guarantees of temporal and hardware constraints are of the utmost importance Choosing the right network s parameters respecting the system constraints becomes a difficult task for designer 2

3. Context & Motivations An accurate timing verification approach is needed to guarantee the network requirements, since the first steps of the design cycle System-level performance analysis The designer need to choose the right system s parameters before investing too much time in detailed implementations A new decision-support tool, WoPANets (Worst Case Performance Analysis of Embedded Networks) Enhancing the design process time and costs of real-time networks 3

4. Related Work Overview The design space exploration approaches for real-time systems are mainly focused on the SW/HW Partitioning/ Mapping issues and generally: Simplify the communication network by considering an arbitrary maximum delay bound Ignore completely the communication issue However, Integrating the accurate design of the communication network with the SW/HW partitioning will clearly enhance the system performance 4

5. Outline Introduction Performance Analysis Methodology Applications Decision-support Tool Conclusions & Key Perspectives 5

6. Timing Verification Approach Need an accurate verification approach to handle Worst-case behavior to fulfill certification requirements Scalability requirements Simple to conduct Tight results Existing approaches Simulation-based: simulating the entire system leads to high complexity and limited efficiency Analytical-based: various existing approaches to analyze the worst-case behavior The most relevant is Network Calculus used for the AFDX certification 6

7. Methodology overview Specification #step1 System Modeling #step2 Refinement #step5 Performance optimization #step4 Performance analysis #step3 7

8. Outline Introduction Performance Analysis Methodology Applications Decision-support Tool Conclusions & Key Perspectives 8

9. Real-Time Networks AFDX standard for avionics Most common Real-Time Ethernet profiles for automation and automotive Spacewire for satellites Network On Chip for the Many-core Architecture 9

10. Outline Introduction Performance Analysis Methodology Applications Decision-support Tool: WoPANets Conclusions & Key Perspectives 10

11. Decision-support tool WoPANets (1) Worst-case Performance Analysis of embedded Networks Performs a system level performance evaluation based on NC Certification requirements Includes an optimization process for design space exploration Enhance the design process time and costs Compatibility with existent conception approaches (UML, AADL) Easy to use within design cycle Integrate high level models of the most common real-time networks Easy to use by any designer without any specific knowledge of the used analytical formalism due to an ergonomic GUI Modular and Easy to extend 11

12. Decision-support tool WoPANets (2) Palette Analysis & Optimization Flow/Node Properties Results 12

13. Decision-support tool WoPANets (3) Related projects ANR Emergence 2012 (WoPANets), Valorisation projects with Airbus Group and ESA (under submission) Publications Mifdaoui, Ahlem and Ayed, Hamdi WOPANets: a tool for WOrst case performance analysis of embedded networks . In: International Workshop on Computer-Aided Modeling Analysis and Design of Communication Links and Networks (CAMAD), 03-04 Dec 2010, Miami, United States. Apvrille, Ludovic and Saqui-Sannes, Pierre de and Mifdaoui, Ahlem A UML framework for the dimensioning and formal verification of embedded systems . In: SAFA Annual Workshop on Formal Methods (SAFA 2009), 23 Sept 2009, Sophia-Antipolis, France. 13

14. Conclusions System level Worst case performance analysis becomes a necessity to avoid introducing errors at the first steps of the design cycle Enhance the design process time and costs A decision-support tool WoPANets is available to be used by industrial designers of real-time networks 14

15. Thanks for your attention Questions?