Hierarchical Multilevel on/off Source Traffic Modeling for a Warship Combat System

For successful migration to network-centric warfare (NCW), it is necessary to control and manage sensor, weapons, and communication systems. Each of these systems must be incorporated in a combat management (CM) system through connection via the combat system databus (CSDB). This synergy between critical features is termed a warship combat system (WCS). For optimization of WCS, performance evaluation before real war should be conducted to measure the reliability of the system. This is accomplished through traffic modeling according to specific scenarios of warships. In practice, the traffic of each system within the WCS exhibits self-similar behavior. This is different from the behavior of short-range dependence (SRD) processes. In this paper, we propose a traffic model called the hierarchical multilevel on/off source (HMLOS) model, which aggregates a number of on/off sources in accordance with the hierarchical structure of the WCS after taking into account the individual characteristics of traffic in each system. The duration of time for the on state of each module is described using the Pareto distribution with a different Pareto index. For two different scenarios, including general navigation and training (GNT) and combat and emergency (CE), the proposed model demonstrates characteristics of self-similarity that are closer to the original characteristics of traffic than conventional traffic modeling.