大覆盖范围Ad hoc路由协议延时性能仿真研究

Simulation of Transmission Performance of Large Range Mobile Ad hoc Network

大覆盖范围下移动Ad hoc网络与普通商用网络相比具有覆盖范围广、节点通信距离远等特点,传统的仿真方法不能很好反映类网络的时延性能。根据应用背景建立了适合的仿真模型,并利用GloMoSim工具对四种路由协议在随机驻点运动模型和马尔可夫平滑运动模型下的时延性能进行了仿真。仿真结果表明大覆盖范围Ad hoc路由协议时延性能受带宽影响较大,而受节点运动速度影响较小;并且按需路由协议时延性能好于主动路由协议。所建节点移动模型仿真对大覆盖范围移动自组织网和工程设计具有一定的参考价值。

Under the large coverage range, compared with ordinary networks, Mobile Ad hoc Network has the characteristics of larger coverage range and longer communication distance etc. Traditional method can＇t reflect its time -delay performance well. After analyzing two important protocols Ad hoc active routing protocol and on - demanding routing protocol, a simulation model was established according to the application background and Glomosire tools were used to simulate time - delay performance of four routing protocols under random waypoint movement model and Morse Marko smoothing movement model. Simulation results proved that on - demanding routing protocol showed better time - delay performance than active routing protocol and also showed that time - delay performance of large Range Mobile Ad hoc Network was influenced more greatly by bandwidth but less by motion velocity of node. The established node mobile model and simulation results are valuable references for mobile self - organized network under large coverage range and engineering design.