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Evolving Standards for Tactical Data Link Aware Simulators

ABSTRACT: The ability to simulate Tactical Data Links is becoming increasingly important in order to more accurately represent the modern battlespace. There is also a need to be able to connect with or simulate commercial use data links such as ADS­B and AIS. LVC applications may rely on the integration between simulation systems and real data links in order to integrate live entities into a simulated scenario in applications ranging from test and evaluation to training. There is also a growing number of COTS simulation tools available that support integration with
data links.


This paper will discuss the need for inclusion of a data link FOM module in the upcoming RPR­FOM v 3.0 which supports various data links such as Link 11, Link 16 and the upcoming Link 22. The paper also discusses the need for supporting a more generic interaction with data links that would enable integration of various simulation CGF components with less effort and enable COTS tools to evolve with a broader support for dif erent data links.

Authors: Patrik Svensson, Stefan Sandberg, Fredrik Antelius, Laurent Ferriani, Laurent Mounet
Publication: Proceedings of 2016 Fall Simulation Interoperability Workshop, 2016-SIW-042, Simulation Interoperability
Standards Organization, September 2016

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A First Look at the Upcoming SISO Space Reference FOM

SISO SIWzie award winner

ABSTRACT: Spaceflight is difficult, dangerous and expensive; human spaceflight even more so. In order to mitigate some of the danger and expense, professionals in the space domain have relied, and continue to rely, on computer simulation. Simulation is used at every level including concept, design, analysis, construction, testing, training and ultimately flight. As space systems have grown more complex, new simulation technologies have been developed, adopted and applied. Distributed simulation is one of those technologies.

Distributed simulation provides a base technology for segmenting these complex space systems into smaller, and usually simpler, component systems or subsystems. This segmentation also supports the separation of responsibilities between participating organizations. This segmentation is particularly useful for complex space systems like the International Space Station (ISS), which is composed of many elements from many nations along with visiting vehicles from many nations. This is likely to be the case for future human space exploration activities. Over the years, a number of distributed simulations have been built within the space domain. While many use the High Level Architecture (HLA) to provide the infrastructure for interoperability, HLA without a Federation Object Model (FOM) is insufficient by itself to insure interoperability.

As a result, the Simulation Interoperability Standards Organization (SISO) is developing a Space Reference FOM. The Space Reference FOM Product Development Group is composed of members from several countries. They contribute experiences from projects within NASA, ESA and other organizations and represent government, academia and industry. The initial version of the Space Reference FOM is focusing on time and space and will provide the following: (i) a flexible positioning system using reference frames for arbitrary bodies in space, (ii) a naming convention for wellknown reference frames, (iii) definitions of common time scales, (iv) federation agreements for common types of time management with focus on time stepped simulation, and (v) support for physical entities, such as space vehicles and astronauts.

The Space Reference FOM is expected to make collaboration politically, contractually and technically easier. It is also expected to make collaboration easier to manage and extend.

Authors: Björn Möller, Edwin Z Crues, Dan Dexter, Alfredo Garro, Anton Skuratovskiy, Alexander Vankov
Publication: Proceedings of 2016 Fall Simulation Interoperability Workshop, 2016-SIW-017, Simulation Interoperability
Standards Organization, September 2016

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Building Scalable Distributed Simulations: Design Patterns for HLA DDM

ABSTRACT: Over the last decades the size of scenarios in distributed simulation has grown considerably, for example in defense training. There is also a demand for larger number of federates within exercises. This means that federation scalability is an area of growing importance. The developers of HLA foresaw this and introduced not only class-based
filtering, but also the HLA Data Distribution Management (DDM) for instance filtering. This is a very general and flexible mechanism for filtering.

The challenge for many beginners has been to understand DDM and to develop efficient designs. This paper presents some design patterns for DDM and discusses their pros and cons as well as implementation and
efficiency. One design pattern is Uniform DDM where all attributes of an object class have the same DDM dimensions available. This makes the use of DDM much easier in federations. Design patterns for filtering based on static properties (like the fuel type of a vehicle) and dynamic properties (like the position of a vehicle) are then covered.

A number of best-practices are also discussed, for example FOM design, handling of objects going in and out of scope as well as the usefulness of advisories. Life cycle challenges, like how to mix federates with and without DDM support are covered.

Finally, some thoughts are given on the design of general and reusable DDM schemes. As an example a number of DDM schemes are proposed for the RPR FOM.

Authors: Björn Möller, Fredrik Antelius, Martin Johansson, Mikael Karlsson
Publication: Proceedings of 2016 Fall Simulation Interoperability Workshop, 2016-SIW-003, Simulation Interoperability
Standards Organization, September 2016

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