provides a standardized interface for distributed simulations. The recent advent of HLA has greatly increased interest in the use of distributed, interoperable simulation model components. To date, most models using HLA have been developed in conventional

6 CONCLUSIONS

We have identified a basic set of requirements that simulation tools must meet in order to make them HLA compliant. We have suggested four general solutions for adopting existing discrete event simulation tools to HLA. The basic ideas behind these solutions can also be applied for other tools which have to be made HLA-compliant.

We introduced a model-independent HLA connection for the simulation tool SLX. This solution provides access to a basic set of HLA functionality from SLX. It comes with an easy to use interface for “doing“ HLA without having to care about the “dirty“programming work with the RTI.

Certain higher techniques of HLA remain to be implemented. Most of this work is in the area of HLA data distribution management, which had not been implemented in the DMSO-provided versions of the RTI we used. RTI support for this service group is announced for later this year and will then be incorporated in future versions of the wrapper library for SLX.

The solution for SLX could, in principle, be used for connecting other simulation tools with a standard DLL interface to the RTI. Modifications are only necessary for the data transfer back to the simulation tool, since this is dependent from the internal data structure representation in the respective tools.

REFERENCES

Cox, A., D. Wood, M. Petty, K. Juge. 1996. Integrating DIS and SIMNET into HLA with a gateway. In Proceedings of the 15th DIS Workshop on Standards for the Interoperability of Defense Simulations, Orlando FL, September 16-20 1996, pp. 517-525. Defense Modeling and Simulation Office (DMSO).

1997. The High Level Architecture Homepage. URL http://hla.dmso.mil/.

Defense Modeling and Simulation Office (DMSO).

1997a. HLA Time Management Design Document, Version 1.0, dated 15 August 1996. Available online at the HLA Homepage (DMSO 1997).

Department of Defense (DoD). 1996. High Level Architecture Rules, Version 1.0, dated 15 August 1996. Available online at the HLA Homepage (DMSO 1997).

Department of Defense (DoD). 1997. High Level Architecture Interface Specification, Version 1.2.

Available online at the HLA Homepage (DMSO 1997).Department of Defense (US). 1997a. High Level Architecture Object Model Template, Version 1.1, dated 12 March 1997. Available online at the HLA Homepage (DMSO 1997).

Dorwarth, H.; P. Lorenz; K. C. Ritter; and T. J. Schriber.

1997. Towards a Simulation and Animation Environment for the Web. In Proceedings of the 1997 Winter Simulation Conference, eds. S. Andradóttir, K.

Healy, D. Withers, B. Nelson, pp. 1338-1344. Fujimoto, R. 1990. Parallel Discrete Event Simulation.

In Communications of the ACM, 1990, no. 10, pp. 30-

53.

Healy, J. H. and R. A. Kilgore. 1997. SILK™: A Java Based Process Simulation Language. In Proceedings of the 1997 Winter Simulation Conference, eds. S.

Andradottir, K. J. Healy, D. H. Withers, and B. L.

Nelson, pp.475-482, SCS, Atlanta

Henriksen, J.O. 1997. An Introduction to SLX™. In Proceedings of the 1997 Winter Simulation Conference, eds. Andradottir, K. J. Healy, D. H.

Withers, and B. L. Nelson, pp.559-566, SCS, Atlanta Klein, U. and S. Straßburger. 1997. Die High Level Architecture (HLA): Anforderungen an interoperable und wiederverwendbare Simulationen am Beispiel von Verkehrs- und Infrastruktursimulationen. In Kuhn, A.

and S. Wentzel (Ed.), Proceedings of the 11th Simulation Symposium ASIM 97. Nov. 11-14, 1997.

Vieweg Verlag, pp. 529-534.

Klein, U., S. Straßburger, J. Beikirch. 1998. Distributed Simulation with JavaGPSS based on the High Level Architecture. In Proceedings of the 1998 International Conference on Web-based Modeling and Simulation Jan. 11-14, 1998, San Diego.

Klein, U., Th. Schulze, S. Straßburger and H.-P.

Menzler. 1998a. Traffic Simulation Based on the High Level Architecture. In Proceedings of the 1998 Winter Simulation Conference, eds. Medeiros, D.J. and Ed Watson, SCS, Washington.

Lorenz, P. and K. C. Ritter. 1997. Skopeo: Platform-Independent System Animation for the W3. In Deussen, O. and P. Lorenz (Ed.), Proceedings of the Simulation und Animation Conference Magdeburg, March 6-7, 1997. SCS European Publishing House San Diego / Erlangen / Ghent / Budapest 1997, pp.

12-23.

Schulze, Th., U. Klein, S. Straßburger, K.-C. Ritter, E.

Blümel, and M. Schumann. 1998. HLA basierte verteilte Simulationsmodelle für die Fertigung. In Preim, B. and P. Lorenz (Ed.), Proceedings of the Simulation und Animation Conference Magdeburg, March 6-7, 1998. SCS European Publishing House San Diego / Erlangen / Ghent / Budapest 1998. pp.19-

31.