CAJ | 학술논문

由于为通信网络验证实验构建真实环境的代价过大，而传统的仿真软件又缺乏真实性，针对这种情况，文中结合虚拟化平台技术，设计了一种网络仿真准实验床系统。通过物理资源虚拟化，将多个全功能网络节点和模拟的通信链路实体部署在虚拟机层面。系统基于XEN准虚拟化环境，引入GNS3和NetEm软件包，分别构造真实路由器和调控通信链路，再由虚拟机模拟网络端节点。实测表明，单台物理服务器可部署6个全功能网络节点和5条通信链路，配置构成一个哑铃型网络的准实验床。分析了Reno和Vegas TCP控制算法的公平性实验结果，并与NS2软件仿真对比，证实所设计的准实验床具有高逼真度。
유우위통신망락험증실험구건진실배경적대개과대，이전통적방진연건우결핍진실성，침대저충정황，문중결합허의화평태기술，설계료일충망락방진준실험상계통。통과물리자원허의화，장다개전공능망락절점화모의적통신련로실체부서재허의궤층면。계통기우XEN준허의화배경，인입GNS3화NetEm연건포，분별구조진실로유기화조공통신련로，재유허의궤모의망락단절점。실측표명，단태물리복무기가부서6개전공능망락절점화5조통신련로，배치구성일개아령형망락적준실험상。분석료Reno화Vegas TCP공제산법적공평성실험결과，병여NS2연건방진대비，증실소설계적준실험상구유고핍진도。
Because of the high costs of building real network environment for network verification experiments while the traditional simu-lators are lack of fidelity,in view of this,present a system of para-testbed for network simulation by the techniques of virtualized plat-form. Aiming at fidelity and scalability of simulation,propose a deployment approach for multiple fully-functional network nodes and communication link emulators on virtual machine layer by physical resources virtualization. The para-testbed is based on XEN server en-vironment to install realistic routers by open source packages GNS3,to control communication links by NetEm,and to simulate network terminals by virtual machines. An experimental para-testbed consisting of 6 nodes and 5 links is to set up over single a machine to simu-late a dumbbell typed network. The results on the fairness experiment of the current Reno and Vegas TCP algorithm are reported and com-pared with that by NS2 evaluations. It is showed that the proposed para-testbed disposes of the fidelity in network simulation.