基于CDMA的Ad hoc网络MAC协议吞吐量研究

网络吞吐量性能是衡量一个通信网络性能的一个重要指标,基于CDMA技术的Ad hoc网络扩频码的分配方案对系统吞吐量性能有着重要的影响,研究了如何充分利用CDMA多址接入能力提高Ad hoc信道利用率等网络性能.通过建立网络状态的马尔可夫模型,提出一种分析吞吐量性能的方法,该方法适用于同时存在背景噪声和多址干扰的情况.最后,通过数值仿真分析了扩频增益和信噪比对吞吐量性能的影响,并对网络参数进行了优化配置.该研究成果对基于CDMA技术的Ad hoc网络设计和优化提供了理论依据.

Research on throughput performance of Ad hoc network MAC protocol based on CDMA

The network throughput performance is an important index of measuring a communication network performance. The dis-tribution scheme of spread spectrum code of Ad hoc networks based on CDMA (code division multiple access) techniques has important influence on throughput performance. How to make full use of CDMA multi-access capacity to improve Ad hoc channel utilization ratio and other network performance is a strongly challenge study. Through building network state Marko link model, a method of analyzing throughput performance, which is suitable to coexist background noise and multi-access interference. Finally, by means of numerical simulation, the impact of spread spectrum gain and signal-to-noise ratio on throughput perforrnance and optimal network parameters con-figuration is analyzed. The results provide theoretical basis for design and optimal of Ad hoc network based on CDMA technique.