基于POOSL的系统级建模方法研究

Study on POOSL-based Method of System-level Modeling

针对复杂嵌入式系统,提出了基于POOSL的系统级建模方法,包括层次化建模方法、面向对象建模技术和基于Y-Chart的资源建模方法。为了验证这些方法的正确性和有效性,以无线接入系统为例,使用POOSL语言建立了它的系统级模型,根据模型的仿真执行结果,分析了活跃站点数和最小竞争窗口等参数对有效吞吐量、平均延时及CPU利用率等性能指标的影响。仿真结果表明,所提系统级建模方法能有效地应用于复杂嵌入式系统的建模。

In order to create the system-level model of complex embedded system effectively, POOSL-based system-level modeling methods were put forward, including hierarchical modeling, object-oriented modeling techniques and resource modeling method based on Y-Chart. The correctness and effectiveness of system-level modeling methods were demonstrated by the modeling and performance analysis of wireless access system. The abstract model of the wireless access system was built by using POOSL. Through the simulation of the model the influence of the parameters such as minimum contention window （CWmin） and number of active stations on the performance metrics was given. Simulation results show that the proposed system-level modeling methods can be used effectively in the modeling for complex embedded systems.