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Design and Implementation of a Tactical-datalink Unit for Interfacing and Forwarding(TUF) to Interlock and Forward MIDS JTRS
Sangtae Lee, Jongseo Kim, Taegwon Kim, Youngseung Kim, Seungbae Jee, Jaeyoung Cheon, MinGyu Jung
http://doi.org/10.5626/JOK.2024.51.3.252
The MIDS LVT terminal is changed to MIDS JTRS terminals with improved crypto modernization, enhanced throughput and frequency remapping functions due to encryption keys and bandwidth limitations. The Korean military is carrying out various performance improvement projects for the Link-16 network equipped with a MIDS JTRS terminal. In this paper, a tactical datalink unit for interfacing and forwarding(TUF) was designed and implemented to interlock and forward tactical information to the existing C2 host system (MCRC, KTMO, etc.) using MIDS JTRS terminal.
The TUF had improved scalability and maintainability through a server-client structure design that could remotely control and manage MIDS JTRS terminal interlocking and forwarding in consideration of the network operating environment. The TUF consisted of interlocking and forwarding, a basic C2 (command & control) host, and a monitoring tool. The TUF was verified through linkage with previously verified overseas tools. The TUF secured technical know-how for MIDS JTRS terminal integration by achieving the purpose of interlocking and forwarding through domestic technology development, away from the existing method of interlocking and forwarding through overseas tools. The existing weapon system without MIDS JTRS terminal linkage function could join the Link-16 network to enhance military operational operability and survivability.
Design and Implementation of Framework Based Emulator Considering Expansion of MIDS LVT Platform
Sangtae Lee, Jongseo Kim, Sounghyouk Wi, Taegwon Lee, Seungbae Jee, Seungchan Lee
http://doi.org/10.5626/JOK.2021.48.1.61
MIDS LVT is communication equipment mounted with Link-16-based weapon systems to provide the Link-16 operating environment between weapon systems. Currently, the military operates the MIDS LVT BU1, but it will be changed to the BU2 and JTRS according to the performance improvement. The communication interface, message data format, and message composition of the MIDS LVT are different depending on the platform family (BU1/BU2/JTRS) and type (A,D,J). In this paper, we propose a framework based emulator design and implementation method that considers the MIDS LVT platform extension to improve these problems. In consideration of the quality attributes of the sw architecture, we designed a common based framework for modifiability, reusability, and extensibility. The MIDS LVT emulator comprises the MIDS LVT emulator processing, link interface processing, and monitoring tool. The MIDS LVT emulator was implemented by deriving and improving functions through the analysis of the functions of the previously developed overseas tools. Through the development of the MIDS LVT emulator, it can be used to develop and verify the developed Link-16 host system.
Design of a ModelAgent for Efficient Development of Dynamic Models
Inhan Kim, Younghwan Jeong, Won-sik Lee, Soung-Hyouk Wi, Hamin Jeong
http://doi.org/10.5626/JOK.2019.46.3.228
Dynamic models are important elements in the process of developing weapon system simulators based on the Defense Modeling and Simulation(DM&S). Also, the model’s accuracy according to the purpose of the DM&S is a very important factor, therefore the modules of the dynamic models should be modified to satisfy required model’s fidelity. The objective of this study is to design a structure of ModelAgent that can efficiently develop and manage the dynamic models. The ModelAgent is designed not only to improve reuse by encapsulating modules using object oriented language but also to be scalable to accommodate a variety of requirements by applying design patterns. Also, the ModelAgent is designed to provide a common interface that enhances portability in the development of dynamic models.
Multi-core Scalable Real-time Flash Storage Simulation
Hyeon-gyu Lee, Sang Lyul Min, Kanghee Kim
http://doi.org/10.5626/JOK.2017.44.6.566
As NAND flash storage is being widely used, its simulation methodologies have been studied in various aspects such as performance, reliability, and endurance. As a result, there have been advances in NAND flash storage simulation for both functional modeling and timing modeling. However, in addition to these advances, there is a need to drastically reduce the long simulation time that is required to evaluate the aging effect on flash storage. This paper proposes a so-called multi-core scalable real-time flash storage simulation method, which can control the simulation speed according to the user’s preference. According to this method, it is possible to speed up the simulation in proportion to the number of CPU cores arbitrarily given while guaranteeing the correctness of the simulation result. Using our simulator implemented in the form of the Linux kernel module, we demonstrate the multi-core scalability and correctness of the proposed method.
Multi-core Scalable Fair I/O Scheduling for Multi-queue SSDs
Minjung Cho, Hyeongseok Kang, Kanghee Kim
The emerging NVMe-based multi-queue SSDs provides a high bandwidth by parallel I/O, i.e., each core performs I/O through its dedicated queue in parallel with other cores. To provide a bandwidth share for each application with I/O, a fair-share scheduler that provides a bandwidth share to each core is required. In this study, we proposed a multi-core scalable fair-queuing algorithm for multi-queue SSDs. The algorithm adopts randomization to minimize the inter-core synchronization overheads and provides a weight-proportional bandwidth share to each core. The results of our experiments indicated that the proposed algorithm gives accurate bandwidth partitioning and outperforms the existing FlashFQ scheduler, regardless of the number of cores for a Linux kernel with block-mq.
Tunable Static Analysis Framework for JavaScript Applications
In this paper, we present a novel approach to analyzing large-scale JavaScript applications statically by tuning the analysis scalability, possibly sacrificing soundness. For a given sound static baseline analysis of JavaScript programs, our framework allows users to define a sound approximation of selected executions that they wish to analyze, and it derives a tuned static analysis that can analyze the selected executions practically. The selected executions serve as parameters of the framework by taking a trade-off between the scalability and the soundness of the derived analyses. We formally describe our framework in the abstract interpretation setting and present two instances of the framework.
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