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<title>Distributed Interactive Simulation</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Distributed Interactive Simulation</span></span>

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<p><b>Distributed Interactive Simulation</b> (<b>DIS</b>) is an <a href="IEEE" class="mw-redirect" title="IEEE">IEEE</a> standard for conducting <a href="Real-time_simulation" title="Real-time simulation">real-time</a> platform-level <a href="Wargaming" class="mw-redirect" title="Wargaming">wargaming</a> across multiple host computers and is used worldwide, especially by <a href="Military" title="Military">military</a> organizations but also by other agencies such as those involved in <a href="Space_exploration" title="Space exploration">space exploration</a> and <a href="Medicine" title="Medicine">medicine</a>.

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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>

<p>The standard was developed over a series of "DIS Workshops" at the Interactive Networked Simulation for Training symposium, held by the <a href="University_of_Central_Florida" title="University of Central Florida">University of Central Florida's</a> <a href="Institute_for_Simulation_and_Training" title="Institute for Simulation and Training">Institute for Simulation and Training</a> (IST). The standard itself is very closely patterned after the original <a href="SIMNET" title="SIMNET">SIMNET</a> distributed interactive simulation protocol, developed by <a href="Bolt%2C_Beranek_and_Newman" class="mw-redirect" title="Bolt, Beranek and Newman">Bolt, Beranek and Newman</a> (BBN) for <a href="DARPA" title="DARPA">Defense Advanced Research Project Agency (DARPA)</a> in the early through late 1980s. BBN introduced the concept of <a href="Dead_reckoning" title="Dead reckoning">dead reckoning</a> to efficiently transmit the state of battle field entities.

</p><p>In the early 1990s, IST was contracted by the United States <a href="DARPA" title="DARPA">Defense Advanced Research Project Agency</a> to undertake research in support of the <a href="United_States_Army" title="United States Army">US Army</a> Simulator Network (SimNet) program. Funding and research interest for DIS standards development decreased following the proposal and promulgation of its successor, the <a href="High_Level_Architecture_(simulation)" class="mw-redirect" title="High Level Architecture (simulation)">High Level Architecture (simulation)</a> (HLA) in 1996. HLA was produced by the merger of the DIS protocol with the <a href="Aggregate_Level_Simulation_Protocol" title="Aggregate Level Simulation Protocol">Aggregate Level Simulation Protocol</a> (ALSP) designed by <a href="MITRE" class="mw-redirect" title="MITRE">MITRE</a>.

</p><p>There was a <a href="NATO" title="NATO">NATO</a> standardisation agreement (<a href="STANAG" class="mw-redirect" title="STANAG">STANAG</a> 4482, <i>Standardised Information Technology Protocols for Distributed Interactive Simulation (DIS)</i>, adopted in 1995) on DIS for modelling and simulation interoperability. This was retired in favour of HLA in 1998 and officially cancelled in 2010 by the <a href="NATO_Standardization_Agency" class="mw-redirect" title="NATO Standardization Agency">NATO Standardization Agency</a> (NSA).

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<div class="mw-heading mw-heading2"><h2 id="The_DIS_family_of_standards">The DIS family of standards</h2></div>

<p>DIS is defined under IEEE Standard 1278:

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<ul><li>IEEE 1278–1993 - Standard for Distributed Interactive Simulation - Application protocols</li>

<li>IEEE 1278.1-1995 - Standard for Distributed Interactive Simulation - Application protocols</li>

<li>IEEE 1278.1-1995 - Standard for Distributed Interactive Simulation - Application protocols (Corrections) <sup id="cite_ref-std1278.1_1-0" class="reference"><a href="#cite_note-std1278.1-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li>

<li>IEEE 1278.1A-1998 - Standard for Distributed Interactive Simulation - Application protocols Errata (May 1998)</li>

<li>IEEE 1278.1-2012 - Standard for Distributed Interactive Simulation - Application protocols</li>

<li>IEEE-1278.2-1995 - Standard for Distributed Interactive Simulation - Communication Services and Profiles</li>

<li>IEEE 1278.3-1996 - Recommended Practice for Distributed Interactive Simulation - Exercise Management and Feedback</li>

<li>IEEE 1278.4-1997 - Recommended Practice for Distributed Interactive - Verification Validation & Accreditation</li>

<li>IEEE P1278.5-XXXX - Fidelity Description Requirements (never published)</li></ul>

<p>In addition to the IEEE standards, the <a href="Simulation_Interoperability_Standards_Organization" title="Simulation Interoperability Standards Organization">Simulation Interoperability Standards Organization</a> (SISO) maintains and publishes an "enumerations and bit encoded fields" document yearly. This document is referenced by the IEEE standards and used by DIS, TENA and HLA federations. Both PDF and XML versions are available.

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<div class="mw-heading mw-heading2"><h2 id="Current_status">Current status</h2></div>

<p>SISO, a sponsor committee of the IEEE, promulgates improvements in DIS. Major changes occurred in the DIS 7 update to IEEE 1278.1<sup id="cite_ref-std1278.1_1-1" class="reference"><a href="#cite_note-std1278.1-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> to make DIS more extensible, efficient and to support the simulation of more real world capabilities.<sup id="cite_ref-DIS_7_2-0" class="reference"><a href="#cite_note-DIS_7-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Application_protocol">Application protocol</h2></div>

<p>Simulation state information is encoded in formatted messages, known as <a href="Protocol_data_unit" title="Protocol data unit">protocol data units</a> (PDUs) and exchanged between hosts using existing <a href="Transport_layer" title="Transport layer">transport layer</a> protocols, including <a href="Multicast" title="Multicast">multicast</a>, though broadcast <a href="User_Datagram_Protocol" title="User Datagram Protocol">User Datagram Protocol</a> is also supported. There are several versions of the DIS application protocol, not only including the formal standards, but also drafts submitted during the standards balloting process.

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<ul><li>Version 1 - Standard for Distributed Interactive Simulation - Application Protocols, Version 1.0 Draft (1992)</li>

<li>Version 2 - IEEE 1278-1993</li>

<li>Version 3 - Standard for Distributed Interactive Simulation - Application Protocols, Version 2.0 Third Draft (May 1993)</li>

<li>Version 4 - Standard for Distributed Interactive Simulation - Application Protocols, Version 2.0 Fourth Draft (March 1994)</li>

<li>Version 5 - IEEE 1278.1-1995</li>

<li>Version 6 - IEEE 1278.1a-1998 (amendment to IEEE 1278.1-1995)</li>

<li>Version 7 - IEEE 1278.1-2012 (See External Link - DIS Product Development Group.) Version 7 is also called DIS 7.<sup id="cite_ref-DIS_7_2-1" class="reference"><a href="#cite_note-DIS_7-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> This is a major upgrade to DIS to enhance extensibility and flexibility. It provides extensive clarification and more details of requirements, and adds some higher-fidelity mission capabilities.<sup id="cite_ref-DIS_7_2-2" class="reference"><a href="#cite_note-DIS_7-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul>

<div class="mw-heading mw-heading2"><h2 id="Protocol_data_units">Protocol data units</h2></div>

<p>The current version (DIS 7) defines 72 different PDU<sup id="cite_ref-std1278.1-2012_3-0" class="reference"><a href="#cite_note-std1278.1-2012-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> types, arranged into 13 families. Frequently used PDU types are listed below for each family. PDU and family names shown in <i>italics</i> are found in DIS 7.

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<ul><li>Entity information/interaction family - Entity State, Collision, Collision-Elastic, Entity State Update, <i>Attribute</i></li>

<li>Warfare family - Fire, Detonation, <i>Directed Energy Fire</i>, <i>Entity Damage Status</i></li>

<li>Logistics family - Service Request, Resupply Offer, Resupply Received, Resupply Cancel, Repair Complete, Repair Response</li>

<li>Simulation management family - Start/Resume, Stop/Freeze, Acknowledge</li>

<li>Distributed emission regeneration family - Designator, Electromagnetic Emission, <a href="Identification_friend_or_foe" title="Identification friend or foe">IFF</a>/<a href="Air_traffic_control" title="Air traffic control">ATC</a>/<a href="Navigational_aid" title="Navigational aid">NAVAIDS</a>, <a href="Underwater_acoustics" title="Underwater acoustics">Underwater Acoustic</a>, Supplemental Emission/Entity State (SEES)</li>

<li>Radio communications family - Transmitter, Signal, Receiver, Intercom Signal, Intercom Control</li>

<li>Entity management family</li>

<li>Minefield family</li>

<li>Synthetic environment family</li>

<li>Simulation management with reliability family</li>

<li>Live entity family</li>

<li>Non-real time family</li>

<li><i>Information Operations family</i> - <i>Information Operations Action</i>, <i>Information Operations Report</i></li></ul>

<div class="mw-heading mw-heading2"><h2 id="Realtime_Platform_Reference_FOM_(RPR_FOM)">Realtime Platform Reference FOM (RPR FOM)</h2></div>

<p>The <a href="RPR_FOM" title="RPR FOM">RPR FOM</a> is a Federation Object Model (FOM) for the High-Level Architecture designed to organize the PDUs of DIS into an HLA object class and interaction class hierarchy. It has been developed as the SISO standard SISO-STD-001.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The purpose is to support transition of legacy DIS systems to the HLA, to enhance a priori interoperability among RPR FOM users and to support newly developed federates with similar requirements. The most recent version is RPR FOM version 2.0<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> that corresponds to DIS version 6.

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<ul><li><a href="Computer_simulation" title="Computer simulation">Computer simulation</a></li>

<li><a href="Simulation_Interoperability_Standards_Organization" title="Simulation Interoperability Standards Organization">Simulation Interoperability Standards Organization</a></li>

<li><a href="SIMPLE_(military_communications_protocol)" title="SIMPLE (military communications protocol)">Standard Interface for Multiple Platform Link Evaluation (SIMPLE)</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20001020024300/http://standards.ieee.org/reading/ieee/updates/errata/1278.1-1995.pdf">"Corrections to Standard for Distributed Interactive Simulation - Application protocols"</a> <span class="cs1-format">(PDF)</span>. <a href="IEEE" class="mw-redirect" title="IEEE">IEEE</a>. Archived from <a rel="nofollow" class="external text" href="http://standards.ieee.org/reading/ieee/updates/errata/1278.1-1995.pdf">the original</a> <span class="cs1-format">(PDF)</span> on October 20, 2000<span class="reference-accessdate">. Retrieved <span class="nowrap">24 April</span> 2017</span>.</cite></span>

</li>

<li id="cite_note-DIS_7-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-DIS_7_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-DIS_7_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-DIS_7_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.sisostds.org/DigitalLibrary.aspx?EntryId=29288">DIS 7 Overview, SISO PSG File Library</a></span>

</li>

<li id="cite_note-std1278.1-2012-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-std1278.1-2012_3-0">^</a></b></span> <span class="reference-text"><cite class="citation book cs1"><i>IEEE Standard for Distributed Interactive Simulation--Application Protocols</i>. <a href="IEEE" class="mw-redirect" title="IEEE">IEEE</a>. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1109%2FIEEESTD.2012.6387564">10.1109/IEEESTD.2012.6387564</a>. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>978-0-7381-7310-8</bdi>.</cite></span>

</li>

<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.sisostds.org/DesktopModules/Bring2mind/DMX/Download.aspx?Command=Core_Download&EntryId=30822&PortalId=0&TabId=105">"Guidance and Rationale and Interoperability Modalities for the Real-time Platform Reference FOM"</a>. <i>SISO</i><span class="reference-accessdate">. Retrieved <span class="nowrap">5 September</span> 2018</span>.</cite></span>

</li>

<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite class="citation journal cs1"><a rel="nofollow" class="external text" href="https://www.sisostds.org/DigitalLibrary.aspx?Command=Core_Download&EntryId=42390">"RPR FOM 2.0: A Federation Object Model for Defense Simulations"</a>. <i>Proceedings of 2014 Fall Simulation Interoperability Workshop</i>. Sep 2015.</cite></span>

</li>

</ol></div></div>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><a rel="nofollow" class="external text" href="https://www.sisostds.org/StandardsActivities/SupportGroups/DISRPRFOMPSG.aspx">SISO DIS Product Support Group</a></li>

<li><a rel="nofollow" class="external text" href="http://faculty.nps.edu/brutzman/vrtp/mil/navy/nps/disEnumerations/JdbeHtmlFiles/pdu/">DIS Data Dictionary</a></li></ul>

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</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="IEEE_802.1" title="IEEE 802.1">802.1</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="IEEE_802.3" title="IEEE 802.3">802.3</a> <br>(<a href="Ethernet" title="Ethernet">Ethernet</a>)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="IEEE_802.11" title="IEEE 802.11">802.11</a> <br>(<a href="Wi-Fi" title="Wi-Fi">Wi-Fi</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="IEEE_802.11_(legacy_mode)" title="IEEE 802.11 (legacy mode)">legacy mode</a></li>

<li><a href="IEEE_802.11ad" title="IEEE 802.11ad">ad</a> (<a href="WiGig" title="WiGig">WiGig</a>)</li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="IEEE_802.15" title="IEEE 802.15">802.15</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="IEEE_802.15.1" class="mw-redirect" title="IEEE 802.15.1">.1</a> (<a href="Bluetooth" title="Bluetooth">Bluetooth</a>)</li>

<li><a href="IEEE_802.15.4" title="IEEE 802.15.4">.4</a> (<a href="Zigbee" title="Zigbee">Zigbee</a>)</li>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proposed</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Superseded</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>

<ul><li><span class="noviewer" typeof="mw:File"><span title="Category"></span></span> Category</li></ul>

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