March 01, 2017

A Model-Driven Engineering Methodology to Design Parallel and Distributed Embedded Systems

  • Apvrille L.
  • Enrici A.
  • Pacalet R.

In Model-Driven Engineering system-level approaches, the design of communication protocols and patterns is subject to the design of processing operations (computations) and to their mapping onto execution resources. However, this strategy allows us to capture simple communication schemes (e. g., processor-bus-memory) and prevents us from evaluating the performance of both computations and communications (e. g., impact of application traffic patterns onto the communication interconnect) in a single step. To solve these issues, we introduce a novel design approach-the Psi-chart-where we design communication patterns and protocols independently of a system's functionality and resources, via dedicated models. At the mapping step, both application and communication models are bound to the platform resources and transformed to explore design alternatives for both computations and communications. We present the Psi-chart and its implementation (i.e., communication models and Design Space Exploration) in TTool/DIPLODOCUS, a Unified Modeling Language (UML)/SysML framework for the modeling, simulation, formal verification and automatic code generation of data-flow embedded systems. The effectiveness of our solution in terms of better design quality (e. g., portability, time) is demonstrated with the design of the physical layer of a ZigBee (IEEE 802.15.4) transmitter onto a multi-processor architecture.

View Original Article

Recent Publications

August 09, 2017

A Cloud Native Approach to 5G Network Slicing

  • Francini A.
  • Miller R.
  • Sharma S.

5G networks will have to support a set of very diverse and often extreme requirements. Network slicing offers an effective way to unlock the full potential of 5G networks and meet those requirements on a shared network infrastructure. This paper presents a cloud native approach to network slicing. The cloud ...

August 01, 2017

Modeling and simulation of RSOA with a dual-electrode configuration

  • De Valicourt G.
  • Liu Z.
  • Violas M.
  • Wang H.
  • Wu Q.

Based on the physical model of a bulk reflective semiconductor optical amplifier (RSOA) used as a modulator in radio over fiber (RoF) links, the distributions of carrier density, signal photon density, and amplified spontaneous emission photon density are demonstrated. One of limits in the use of RSOA is the lower ...

July 12, 2017

PrivApprox: Privacy-Preserving Stream Analytics

  • Chen R.
  • Christof Fetzer
  • Le D.
  • Martin Beck
  • Pramod Bhatotia
  • Thorsten Strufe

How to preserve users' privacy while supporting high-utility analytics for low-latency stream processing? To answer this question: we describe the design, implementation and evaluation of PRIVAPPROX, a data analytics system for privacy-preserving stream processing. PRIVAPPROX provides three properties: (i) Privacy: zero-knowledge privacy (ezk) guarantees for users, a privacy bound tighter ...