聚焦关注区域的网络模拟方法

Method of Network Simulation for Focusing on Attention Area

为降低大规模网络模拟的计算开销并保证模拟的真实性,提出了一种聚焦关注区域的网络模拟方法.该方法将所要模拟的网络拓扑分为关注区域及非关注区域2个部分,并对关注区域采用离散事件模拟技术以保证真实性,对非关注区域采用"拓扑-流量"联合抽象模拟技术以降低计算开销.分析了"拓扑-流量"联合抽象模拟技术的模拟真实性.基于NS2的实验结果表明,当聚焦系数为4时,相对于传统的网络模拟技术,该方法能降低模拟计算开销85%以上,而关注区域模拟结果的平均误差在2%左右.

To reduce the computational overhead of large-scale network simulation while keeping the sim- ulation fidelity, a network simulation method of focusing on the attention area is presented in which the network topology for simulation is partitioned into two parts： attention area and non-attention area. To keep fidelity, the attention area is simulated by discrete event simulation. And to reduce the computation- al overhead, the non-attention area is simulated by topology - flow combined abstraction simulation. The simulation fidelity of topology-flow combined abstraction simulation is analyzed. Experiments based on NS2 show that, when the focusing coefficient is 4, compared to the traditional network simulation, this method can decrease the computational overhead of simulation by over 85% at most, also, the average error of simulation results of attention area is only about 2%.