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Improving Tactical Data Link Simulation Standards To Better Support LVC Exercises

ABSTRACT: The SwAF Air Combat Simulation Centre (FLSC) has taken an initiative called the Air Combat FOM (AC-FOM), which extends the RPR-FOM v.2.0 standard reference Federation Object Model (FOM) to better support aerial combat simulation and further enhance the level of interoperability between various internal and external simulation components. As part of the work of extending the Real-time Platform Reference Federation Object Model (RPR-FOM), FLSC has also identified a need to improve the way current standards support simulations of Tactical Data Links (TDL).

The identified drawbacks with the current standards of simulating the Link16 TDL is that it requires a lot of ef ort to implement, is cost driving and is hard to use when connecting to simulation sites in other security domains. The current standards have not succeeded in attracting the Commercial of The Shelf (COTS) market in supporting it and today, as an example, very few COTS Computer Generated Forces (CGF) tools support TDL. Benefits of the current standards are however that they enable the connection with real/live systems and since Live, Virtual and Constructive (LVC) is 1 an important requirement for the future of FLSC this needs to be catered for in future versions of TDL simulation standards.


Another requirement, due to the need to of er a simulation capability and support training for other countries than Sweden, the TDL simulation standard should support the simulation of dif erent TDLs without the requirement of making large changes to the simulation system. A more generic and “clear text” implementation that complements the current standards requirement for a link specific binary data array. This paper discusses how current standards should be updated to better support the simulation requirements of FLSC and similar sites and improve interoperability with other simulation sites while maintaining interoperability with real Tactical Data Link networks.

Authors: Patrik Svensson, Stefan Sandberg, Jouni Lindqvist, Ragnar Hammarqvist
Publication: Proceedings of 2018 Winter Simulation Interoperability Workshop, 18W-SIW-040, Simulation Interoperability Standards Organization, January 2018

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Categories
Papers

Towards a Standardized Federate Protocol for HLA 4

ABSTRACT: HLA is a powerful interoperability standard with a rich set of services for information exchange, synchronization and management of federations. These services are accessed through a local RTI library, installed on the same computer as the simulation itself. As new and improved RTI versions are released, or if the user wants to switch RTI supplier, these libraries need to be replaced. What if there were instead a simple protocol that a simulation could use to access the HLA services?


This paper proposes such a protocol for HLA 4. It partly builds on experiences from the Web Services API in HLA Evolved. The WS API proves the concept, but has several shortcomings dues to its use of blocking calls and use of XML. An optimized, streaming, binary protocol is instead suggested. Such a protocol would make it easy to add a small and
generic library to any federate. Switching RTI libraries would then be a simple operation of connecting to a different network address.

Additional advantages are that it makes it easy to provide native HLA support for any language, like C# or Python, to execute in CPU-constrained or hard real-time environments, to communicate in mobile environments, like 3G or 4G, or even to embed HLA support in hardware equipment. It can also be used to avoid re-accreditation of simulations, since the accredited simulator need not be updated. Some design considerations include discovery, session management and latency handling. Early test implementations have shown performance close to current RTI performance and improved fault tolerance over WAN links. To be able to easily swap between different RTI implementations, a standardized protocol is now being proposed to the HLA 4 Product Development Group.

Authors: Björn Möller, Mikael Karlsson, Fredrik Antelius
Publication: Proceedings of 2018 Winter Simulation Interoperability Workshop, 18W-SIW-037, Simulation Interoperability Standards Organization, January 2018

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