부산대학교 도서관

A computer simulator of a tactical communication system is presented. The simulated system is a circuit-switched digital system with nodes connected by line-of-sight (LOS) links or by wire links. The node of the system is moveable. It means, that during the simulation process, they can move according to the trajectory given by the user. It is possible, that the network resources can decrease because of enemy artillery fire or electronic jamming. The goal of simulation is the estimation of the following measures: network service accessibility, network service utilization rate of the network resources (links, nodes), and survivability. The presented simulator can carry out simulation experiments according to three scenarios: simulation of a stationary network (without any movement and enemy activity), simulation of a network with movement of fixed nodes, and simulation with nodes movement and enemy fire and jamming attack. For the first event, the limited characteristics for constant network topology and stationary load (stationary measures) are estimated. For the next two events, transient measures for a fixed time after the beginning of the system activity are estimated. The main modules of the simulator, features of simulated system, estimated performance measures and the method of their estimation for different simulation scenarios are also presented.