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SIMULATION
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An Approach for the Unified Time Management Mechanism for HLA

Jiung-yao Huang

Department of Communication Engineering, National Chung Cheng University, Min-Hsiung, Chia-Yi, Taiwan, comjyh{at}ccu.edu.tw

Ming-Chih Tung

Department of Computer Science and Information Engineering, Ching Yun University, Taoyuan, Taiwan, mctung{at}cyu.edu.tw

Lin Hui

Department of Computer Science and Information Engineering, Tamkang University, Taipei, Taiwan

Ming-Che Lee

Groundhog Technologies Inc., Taipei, Taiwan

The High Level Architecture (HLA) is the IEEE 1516 standard to model and design a distributive simulation environment. It establishes a common distributed simulation framework, which facilitates the interoperability and reuse of simulation components. However, some HLA services are very low level and difficult to use, especially when a simulation is designed with a particular time synchronization mechanism. This article describes an agent interface, called Smart Time Management (STM). The capabilities of the STM include the following: taking over the event’s time-stamp tagging work, maintaining a lookahead value, and unifying different time advance approaches provided by the HLA runtime infrastructure. In addition, it adopts the time warp mechanism for optimistic simulation. In conclusion, the STM presents a unified and scalable middle layer to allow the user to construct an HLA federation with a unanimous Time Management interface when solving the synchronization issue.

Key Words: Distributed simulation • High Level Architecture • event driven • time stepped • optimistic synchronization

SIMULATION, Vol. 81, No. 1, 45-56 (2005)
DOI: 10.1177/0037549705051973
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