论文标题
MAC参数对NS-3中IEEE 802.11 DCF性能的影响
Effects of MAC Parameters on the Performance of IEEE 802.11 DCF in NS-3
论文作者
论文摘要
本文介绍了根据TCP/IP模型的层次结构方式组织的NS-3脚本的设计过程。我们通过使用NS-3模型对象来配置所有图层，并设置并修改对象使用的值，以研究MAC参数（访问机制，CWMIN，CWMAX和RETRY限制）对性能指标的影响。数据包输送比率，数据包损失比率，汇总吞吐量和平均延迟。仿真结果表明，RTS/CTS访问机制在饱和状态下优于基本访问机制，而MAC参数对非饱和状态的网络性能没有显着影响。 CWMIN的较高值以平均延迟为代价改善了总吞吐量。在MAC参数的最佳值的结果中，还可以观察到性能指标之间的权衡关系。我们的设计程序代表了新的NS-3用户设计和修改脚本的良好指南，结果极大地使网络设计和管理受益。
This paper presents the design procedure of the NS-3 script for WLAN that is organized according to the hierarchical manner of TCP/IP model. We configure all layers by using NS-3 model objects and set and modify the values used by objects to investigate the effects of MAC parameters (access mechanism, CWmin, CWmax and retry limit) on the performance metrics viz. packet delivery ratio, packet lost ratio, aggregated throughput, and average delay. The simulation results show that RTS/CTS access mechanism outperforms basic access mechanism in saturated state, whereas the MAC parameters have no significant impact on network performance in non-saturated state. A higher value of CWmin improves the aggregated throughput in expense of average delay. The tradeoff relationships among the performance metrics are also observed in results for the optimal values of MAC parameters. Our design procedure represents a good guideline for new NS-3 users to design and modify script and results greatly benefit the network design and management.
