The document discusses convergence of distributed simulation architectures using the Data Distribution Service (DDS). It notes the vision for the future of modeling and simulation systems is for pluggable simulation elements delivered as a service over a network. However, realizing this vision is complex due to different standards, legacy systems, and security issues. The Standard for the Interchange of Simulation Modeling (SISO) is looking to customize DDS for the simulation domain via a Layered Simulation Architecture (LSA) to help address these challenges. DDS is compared to the High Level Architecture (HLA) standard, finding DDS more suitable for scalability, fault tolerance, real-time simulation, and less-than-perfect networks. The document presents Sim

1. Convergence of Distributed
Simulation Architectures Using
DDS
OMG TECHNICAL MEETING
Data Distribution Service Information Day
June 17th 2013. Berlin
June-2013
NADS-2012-MKT-CORPORATE-EN-V1.5
Jose-Ramon Martinez-Salio
Presales director NADS
SISO LSA vice-chairman
jrmartinez@nads.es

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Our Vision: Future of M&S systems is on the network
Pluggable
elements of
Simulation
(Simulation as
a Service)
Evolution of the simulation industry

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Concept of Distributed Simulation
Simulations are interactive through current state-of-the-art communications systems
Constructive
Virtual
Live
Constructive
Virtual
Live
Can be across the world
or across the room!
Simulation environments that are distributed across multiple computers, potentially
at different locations
Predictible latencies are required

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Our Vision: Future of M&S systems is on the network
But Reality is Complex:
* Different Standards for interoperability
* Too many COTS hard to interoperate between them
* Different Data & Voice Communications
* Legacy Systems
* Heterogeneous simulation ecosystems
* Security Issues
* Scaling-Up to Very Large Exercises

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Defense Administrations have invested a lot in
simulation systems for weapon systems but:
* Poor use of existing simulation assets
* Difficult to change and update fast
* Distributed Mission Training is very difficult
* Interoperability is very limited
* Tied hands with HLA COTS vendors

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Due to these problems, SISO starts a new Study
Group : LSA, looking to solve many of this pains.
SISO LSA is looking to
customize DDS for the
simulation domain,
providing the foundation
for a Layered Simulation
Architecture

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LSA proposed layered architecture overview?

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CONVERGENCE OF DISTRIBUTED ARCHITECTURES WITH SISO LSA
SISO LSA
TENA
DIS
HLA
 Don´t try to re-invent the wheel
 Apply standards, don´t change the standards

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 A IEEE and NATO (Stanag 4603)
standards
 An accepted standard for
interoperating simulators
 Has meta-data model (OMT)
 Define rules for interoperability
 Many COTS from different vendors
 Services are part of HLA
 Wire protocol does not exist
 The entire standard tries to limit
communication
 QoS are very limited.
 Lack of plug&play capacities.
 Performance is not enough for
massive data distribution across
heterogeneous networks.
 API is hard to use
 No security standard
 Model is rigid
An assessment of HLA present capabilities

10. Comparison of DDS and HLA Standards
[Source 12F-SIW-027]
Very useful for
simulation
Useful for data
interoperability
Useful for
modularity
Simulation specific
services
Useful for live
simulation

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Why use DDS in Simulation?
COMMUNICATION
DDS is centered in controlling the
communication
HLA tries to minimize the
communication. It cannot control it
DIS trust the communication
SCALABILITY and FAULT TOLERANCE
DDS has automatic discovery, is fully
publish-subscriber, no single point of
failure
HLA is central server based: scalability
and fault tolerance are difficult
[DDS Global Data Space]
TOPIC “A”
TOPIC “C”
TOPIC “D”
TOPIC “B”
Data
Write
r
Data
Reader
Data
Write
r
Data
Write
r
Data
Write
r
Data
Reader
Data
Reader
Data
Write
r

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Why use DDS in Simulation?
LESS-THAN-PERFECT COMMUNICATIONS
DDS has been proved over small
bandwidth (4800 bps in digital network
radios)
DDS can cope with heterogeneous
networks
REAL TIME SIMULATION
Military platforms use DDS as
the communication backbone
Simulating with DDS can
incorporate this data in real time

13. SimWare

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SimWare and LSA?

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SimWare: IRC revolution
SimWare is the IRC revolution
INTEROPERABILITY: We can connect HLA and DIS
simulators without changing them. HLA evolved
also included
REUSABILITY: You can reuse your previous work
COMPOSABILITY: Make your simulation just by
joining pieces

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Concept #1: Interoperability
Simulator A Simulator B

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Concept #2: Reusability
Simulator A Simulator B
same weapon model
runs in both
simulators

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Concept #3: Composability
Scenario built from
simulation assets
Sim Assets

19. LSA Use Case
SP Battle Lab Prototype (NOGESI)

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Nogesi milestone
NOGESI project has been the test bed and proof of
concept of SimWare architecture

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SimWare Lab
SimWare Lab has evolved as integration laboratory
for SimWare
HLA
DDSLaboratory

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SimWare: Simulation as a service
SimWare Lab is the first simulation service
 Transparent to the user
 Composability
 Pluggable
 Fully distributed

24. Please address any questions about this presentation to:
José Ramón Martínez Salio
Technical Presales Director
jrmartinez@nads.es
@NADS_news /NEXTELADS Nextel Aerospacejrmses