VoWLAN结构的仿真与分析  

Simulation and analysis of VoWLAN framework

作　　者：徐延海 

机构地区：[1]陕西邮电职业技术学院,陕西咸阳712000

出　　处：《信息技术》2016年第10期194-197,共4页Information Technology

摘　　要：VoWLAN(voice over wireless local area network)是对有线的VoIP系统的扩展。Adhoc网络作为一种无中心节点自由组网特点的网络非常适合应急通信的要求。在应急通信中,语音通信是最基本也是最为实用的。近些年来VoIP技术迅猛发展,相比于传统语音通信,VoIP技术使用语音压缩编码,带宽利用率高,利用互联网进行传输,因而价格低廉。文中通过研究Ad hoc网络架构和特点,并在OPNET下建立了一个Ad hoc网络的仿真模型,利用该模型完成了对VoIP性能的仿真。通过对协议进行仿真分析,并将仿真结果与DCF进行了比较,EDCF机制稳定后的平均时延处于2ms范围,而DCF机制的平均时延大约是10ms,所以时延方面EDCF机制优于DCF,而通过网络稳定后DCF机制网络吞吐量大于EDCF机制。VoWLAN is an extension of the VoIP system of cable. Ad hoc network is well adapted to emergency communication for its characteristics such as non-central node and free network construction.In emergency communication,voice communication is the most basic and most useful. In recent years,VoIP technology has been rapidly developed. Compared to the traditional voice communication,VoIP uses voice compression encoding, and its bandwidth utilization is higher. VoIP uses Internet for transmission,so the price is lower. In this article,through the Ad hoc network architecture and characteristic,and it obtained in the OPNET simulation model of an Ad hoc network by using the model completed on VoIP performance simulation. Through the simulation analysis of protocol, and the simulation results are compared with those of the DCF model,mechanism of EDCF stability after an average delay in 2 ms range,and the average delay of DCF model mechanism is about 10 ms,so delay EDCF mechanism is superior to DCF model,and through the network stability after the DCF model and mechanism of network throughput than the EDCF.

关 键 词：AD HOC网络 VOIP OPNET 

分 类 号：TP92[自动化与计算机技术]