• Journal of the Korea Society for Simulation
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• v.25 no.4
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• pp.43-52
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• 2016

Wireless sensor network (WSN) technology has been implemented using commercial off-the-shelf microcontrollers (MCUs), In this paper, we propose a simulation environment to realize the physical evaluation of FPGA-based node by considering vertically cross-layered WSN in terms of physical node device and network interconnection perspective. The proposed simulation framework emulates the physical FPGA-based sensor nodes to interoperate with the NS3 through the runtime infrastructure (RTI). For the emulation and interoperation of FPGA-based nodes, we extend a vendor-providing FPGA design tool from the host computer and a script to execute the interoperation procedures. The standalone NS-3 is also revised to perform interoperation through the RTI. To resolve the different time-advance mechanisms between the FPGA emulation and event-driven NS3 simulation, the pre-simulation technique is applied to the proposed environment. The proposed environment is applied to IEEE 802.15.4-based low-rate, wireless personal area network communication.

• The Journal of the Korea Contents Association
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• v.20 no.11
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• pp.301-313
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• 2020

This study is a study on the interlocking method between emergency preparedness simulation model and military exercise war game model. The national emergency preparedness government exercises are being carried out by a message exercise and technology development for simulation models is being carried out to create a situation similar to the actual practice. In order to create a situation similar to the actual war, the military situation must be reflected and to do so, a link with the military exercise war game model is needed. The military exercise war game model applies HLA/RTI, which is a standardized interlocking method for various models such as Taegeuk JOS, and it is necessary to apply HLA/RTI linkage method to link with these military exercise war game models. In addition, since the emergency preparedness simulation model requires limited information such as enemy location and enemy attack situation on major facilities in the military exercise model, a method of interlocking that can select and link information is required. Therefore, in this study, the interlocking interface design plan is presented in order to selectively link the interlocking method and information between the emergency preparedness simulation model and the military exercise war game model. The main functions of interlocking interface include federation synchronization, storage and recovery, object management service, time management, and data filtering functions.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.370-372
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• 2003

본 논문은 GRID 상에서 HLA(High Level Architecture)를 기반으로 한 분산 객체 지향 simulation을 위한 네트워크 하부구조인 Run-Time Infrastructure (이하 RTI)의 디자인과 구현에 관해 기술한다. RTI는 지리적으로 떨어진 응용 프로그램간의 정보 교환 외에도, 접속 사양에 정의된 다양한 서비스를 제공하는 middleware이다. GRID는 전세계에 펼쳐져 있는 자원들에 대한 관리와 접근, 사용을 위한 다양한 기능과 안전하고 편리한 security를 보장한다. 본 논문에서는 globus toolkit에서 지원하는 security와 자원 접근 방법을 사용해서 RTI에 보안과 자원의 동적 할당을 부여해서 RTI를 이용한 simulation에 뛰어난 상호 연동 능력과 대규모의 프로젝트를 위한 광범위한 자원을 보다 안전하고 효율적으로 사용할 수 있도록 하는 환경을 구현하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10b
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• pp.1253-1256
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• 2001

최근 모델링 및 시뮬레이션(M&S) 체계 구축 관련 기술들이 미 국방부를 중심으로 활발히 연구됨은 물론 민간 사업으로 확산되는 등 그 소요가 급속히 증가하고 있다. 또한 기존의 모형 및 개발 모형들도 차세대 연동 체계인 RTI(Run_Time Infrastructure)를 모형에 적용함으로써 HLA(High Level Architecture)를 포함한 차세대 M&S 체계의 핵심 기술을 조기에 획득하여 이를 개발하고 운용하는 능력을 확보하는 것이 시급히 요구되고 있다. 본 논문에서는 첨단 정보 기술의 결집체인 HLA 의 핵심 기술을 이용한 HLA 시뮬레이션 방법을 제시하였으며, HLA가 보장하는 상호 운용성과 재사용성을 모형 확장을 통해 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1334-1337
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• 2011

HLA(High Level Architecture)는 분산 환경의 모델링 및 시뮬레이션(Modeling & Simulation)을 위한 공통 아키텍처를 제공하는 기술 표준이며, RTI(Run-Time Infrastructure)를 통해 HLA 서비스를 제공한다. HLA는 연동 객체 모델인 FOM(Federation Object Model)을 기반으로 시뮬레이션 환경을 구성하며, 시뮬레이션에 참여하는 모든 시뮬레이터는 동일한 FOM을 소유해야 한다. 따라서 시뮬레이션 체계 간 연동을 수행하기 위해서는 FOM을 통합하거나 FOM 간 연동을 위한 게이트웨이를 구현해야 한다. 한편, FOM을 통합하는 방법은 각 시뮬레이션의 연동 인터페이스 수정이 필요하기 때문에 게이트웨이를 구현하는 방법이 기존 시스템의 변경을 최소화할 수 있다. 따라서 본 논문은 HLA기반 시뮬레이션의 체계 간 연동을 제공할 수 있는 게이트웨이 구조를 제시한다. 특히, XML 형태의 객체 모델을 기반으로 교환 메시지를 정의하고, 메시지 처리 모듈을 게이트웨이에 플러그인 함으로써 시뮬레이션 체계 간 연동의 용이함을 보여준다.

• Journal of Korea Multimedia Society
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• v.23 no.8
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• pp.1066-1074
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• 2020

High Level Architecture/Run-Time Infrastructure (HLA/RTI) is used to connect individual simulators on networks in order to interoperate heterogeneous simulators. In defense domain, Ship Air Defense Model (SADM) and Extended Air Defense Simulation (EADSIM) are two of most advanced simulation tools. To interoperate these SADM and EADSIM, this paper attempts to use HLA/RTI that helps to support a Composite Combat Mission Planning Simulation Environment (CCMPSE). The CCMPSE allows us to analyze a group of simulations for comprehensive and accurate experiments. For the first time, this paper analyzes guided missile simulations in EADSIM and SADM by comparing related simulation models in their parameters and considerations. It presents characteristics of these models in view of guided missile simulation perspectives. For the contributions of this paper, it provides insights to select guided missiles between SADM and EADSIM on the CCMPSE according to specific simulation purposes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.498-506
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• 2018

Recently, the US commanded a wargame simulation system of a combined ROK-US exercise with single federation. However, after the OPCON transfer, many limitations to the single federation have been cited such as security policies and information protection. We suggest a hierarchical federation as a way to overcome these problems. Regarding HLA rules, the participants use the same FOM and RTI in single federation. There are limitations to implement CI in applying heterogeneous FOMs and RTIs in current single federation. Therefore, we propose implementing CI with heterogeneous FOMs and RTIs in a hierarchical federation. This system overcomes the weaknesses of the system structure, which is a disadvantage of the single federation. In the federation test, we can apply heterogeneous FOMs and RTIs and achieve similar performance to the current combined exercise simulation. In conclusion, ROK should lead the simulation system of combined exercises using the CI after the OPCON transfer.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.739-742
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• 2010

본 논문은 국방 네트워크 환경측면에서 실 전략정보에 대한 접근/활용 범위가 확대되고, 정보의 신뢰성/가용성에 대한 중요도가 강조되고 있는 워게임 연동객체의 보안화 방안에 대해 기술한다. 연동객체는 HLA/RTI에서 시뮬레이션을 위한 페더레이터로 정의된다. RTI는 페더레이터간 정보교환, 접속 사양에 정의된 다양한 서비스를 제공하는 미들웨어이다. 정책을 기반으로 네트워크상에서 자원들에 대한 관리와 접근, 사용을 위한 다양한 기능과 안전하고 편리한 보안기능들이 널리 활용되고 있다. 본 논문에서는 RTI Security 인터페이스와 정책을 기반으로 한 자원접근 방법을 사용해서 페더레이터의 취약한 정보보호 기능을 강화하였다. RTI의 페더레이트 실 정보에 다계층 보안 수준을 적용하고 보안등급별로 필터링하여 연동객체 스스로가 정보를 보호(Self-protection)할 수 있도록 하는 환경을 구성하고 관리할 수 있는 시스템을 제안한다.

• Journal of the Korea Institute of Military Science and Technology
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• v.18 no.5
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• pp.582-593
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• 2015

For military training and course-of-action analysis, OneSAF Int'l version being used in ROK Army has a limited capability to simulate NBC(nuclear, biological, and chemical) damages. For high-fidelity NBC combat simulation, it is required to visualize NBC contamination dispersion in consideration of weather conditions and terrain characteristics. However, OneSAF itself handling interaction among thousands of combat entities cannot carry out a simulation of NBC contamination dispersion because it brings about an excess burden. To resolve this problem, this research aims to design simulation federation for analysis on NBC operational effects. After examining design consideration to connect OneSAF and a NBC contamination dispersion model, we design a federation architecture that facilitates the interaction between OneSAF and a NBC contamination dispersion model. Afterwards, we implement a federation interface to share simulation data by publish-subscribe pattern and to translate them into the proprietary format for each model. We prove the possibility of federation between both models, as showing that dispersion of NBC contaminated cloud and changes in concentration are reflected in OneSAF-based engagement simulation.

• Journal of Information Technology and Architecture
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• v.9 no.3
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• pp.253-263
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• 2012

Presented in the paper is a methodology for the distributed simulation of underwater warfare based on standard synthetic environment. In the case of underwater warfare simulation, it is very important to reflect environmental data, such as salinity and temperature. For the reusability and interoperability of environmental data, this paper adopts Synthetic Environmental Data Representation and Interchange Specification (SEDRIS(ISO standard for environmental data)). Although SEDRIS provides various merits as an international standard, applying of SEDRIS has been hindered by its broadness and heaviness. To relieve the difficulties, this paper proposes an efficient procedure to utilize SEDRIS technology for the atmosphere and underwater environment. This paper identifies SEDRIS structure for the atmosphere/underwater structured dimensional grid-based and implements the proposed procedure on the High Level Architecture (HLA) / Run-Time Infrastructure (RTI) to explain the generation of the battlefield in a distributed simulation system.