The Design And Implementation Of A New Kind Of Network Simulation Software NDS-2 Oriented To Network System Design

Network Simulation is a important method of network system design.Because some existing network simulation software can't be satisfied for requirement of network system design, I have designed and implementated a new kind of network design simulator NDS-2 oriented for network system design, and I have done many relative research concurrently. In this paper, I will mainly discuss about system simulation technology, information network system design, high performance switching architecture and its scheduling algorithm. And we have designed and implemented for NDS-1, NDS-2. Firstly, we will summerize all the work listed as below:1. I have studied about the basic procedure, implementation method, main applycation of system simulation technology, discrete event simulation, and network simulation. And I focus on the basic method and exsting problems of network simulation and exsting network simulation software. I suppose that the exsting network simulation software can't afford to the requirement of network system design. So it is necessary for this task. I have analysis and study the network simulation software NS-2, It will be the good foundation for the design and implementation of network design simulation NDS-1, NDS-2.2. I have discussed the basic content and main methodsof information network system design and performance evaluation. And I analysis and compare these main methods. I point out that differrent method has own specialties and network simulation is predominant for aidding network system design and performance evaluation.3. I have studied the implementation of input-queued, output-queued, combined input-output queued of high performance switching arichecture, mainly focused on these aspects, such as throughout, stability, fairness, delay control, multicast support.4. In the design and implementation of NDS-1, I bring forward a open, modular, object oriented, visual interactive integrated network modeling and simulation platform, which can provide a directed, flexible and easy to operate network graphic modeling and simulation data analyse interface for network research. I have finished the system design and implemented the visual editor, simulation scripts generator, network simulation core selection, simulation data analyse. A system instance applying NDS-1 to evaluate the performance multimedia network is given.5. In the design and implementation of NDS-2,I bring forward that network design simulator should include network protocols simulation, network devices simulation, and network application simulation. Network protocols simulation refers the protocols modeling and simulation. Network devices simulation refers that differences of devices'archicture and performance parameter should be reflected. Network applications simulation refers...