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Communication Dans Un Congrès Année : 2005

A New Algorithm for the HLA Lookahead Computing in the DEVS/HLA Environment

Résumé

This paper presents a new DEVS/HLA environment. It is based on DEVS concepts allowing hierarchical modular modeling and fast event-driven simulations combined with HLA specification to interconnect distributed DEVS models. For this purpose, we develop a different DEVS mapping with the HLA specification regarding those proposed by Zeigler. This new mapping doesn't transfer the information of coupling relations from RTI level to federate level and doesn't broadcast messages globally between federates. Therefore, this mapping permits a more accurate use of the RTI. The steps of the proposed DEVS/HLA integration are those of the HLA FEDEP. In particular, we address a new solution to HLA Time Management requirement and we focus on the computation of HLA lookahead using DEVS models current state and a depth-first search algorithm. Using this algorithm on specific DEVS models, with explicit phases and constant life-time function associated with, we compute a HLA Lookahead value greater or equal to minimum of life-time function values of local DEVS coupled models. Furthermore, our local simulation structure is “flatten” to reduce the exchange of messages between components with regard to the structure of classical DEVS simulators. Finally, the proposed environment can integrate DEVS simulators and heterogeneous HLA-compliant programs to compose global simulations.
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Dates et versions

hal-00173613 , version 1 (20-09-2007)

Identifiants

  • HAL Id : hal-00173613 , version 1

Citer

Gregory Zacharewicz, Norbert Giambiasi, Claudia Frydman. A New Algorithm for the HLA Lookahead Computing in the DEVS/HLA Environment. 2005 SISO EURO SIW - the European Simulation Interoperability Workshop 2005, Jun 2005, Toulouse, France. pp.05E-SIW-028. ⟨hal-00173613⟩
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