异构网络的垂直切换仿真建模及其性能评估  

Simulation Modeling of Vertical Handover in Heterogeneous Network and Its Performance Evaluation

作　　者：赵宜升[1] 李云[1] 刘占军[1] 刘期烈[1] 

机构地区：[1]重庆邮电大学无线信息网络研究中心,重庆400065

出　　处：《计算机工程》2010年第5期95-96,99,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60702055);华为公司合作基金资助项目(YBWL2008033)

摘　　要：针对无线网络的异构化趋势,对WLAN和UMTS形成的异构网络进行扩展,使其包含WLAN,WiMAX和UMTS 3种网络。基于介质独立切换对扩展后异构网络中的垂直切换进行仿真建模。评估切换时延、切换期间的丢包数目和网络使用效率,结果表明,链路即将断开(LGD)方式的切换时延小于链路断开(LD)方式,且丢包数较少,网络使用效率随着功率强度门限系数的增大而降低。Aiming at the heterogeneous trend of wireless network, this paper extends the heterogeneous network composed of WLAN and UMTS, and makes it contain WLAN, WiMAX and UMTS. Simulation model of vertical handover in extended heterogeneous network is built based on Media Independent Handover（M1H）. It analyzes the handover delay, packet loss count and network usage efficiency during the handover period. Simulation results indicate that Link Going Down（LGD） mode has little handover delay and packet loss count than Link Down（LD） mode. The network usage efficiency decreases when the power level threshold coefficient increases gradually.

关 键 词：介质独立切换 异构网络 垂直切换 

分 类 号：TP393.07[自动化与计算机技术—计算机应用技术]