Abstract:

The performance of time management services is directly related to the effectiveness and correctness of DVE established according to the HLA standards. Generally, the realized time management services include two message ordering mechanisms: the receiving order and the time stamping order. The receiving order has a good realtime property but cannot correctly deliver messages that the receiving order is violated to their generating order. The time stamping order can maintain the message delivery in the generating order, while it is hard to meet the realtime property of DVE for its significant overhead. In this article, we propose a common distributed middleware to offer causal order time management services for DVE, which provides standard program interfaces of HLA. The experimental results demonstrate that by utilizing this middleware the delivery order of messages can be preserved correctly and effectively, in the meantime, the small overhead is suitable for the requirement of the realtime property of DVE.

Key words: HLA;DVE;time management;causal order;distributed middleware