6LoWPAN网络信道吞吐量研究

摘要

为了改进6LoWPAN网络吞吐量性能,提出了一种基于超帧睡眠期的信道接入方法,基于该方法对网络媒体访问控制协议建模,并对模型进行了数学推导.然后对网络非饱和吞吐量进行了分析计算,并研究了参数λ、minBE和NB对网络吞吐量性能的影响.数学分析表明,该模型较好的描述了网络信道竞争接入算法,能够准确地分析基于睡眠机制的信道吞吐量的动态变化.%To optimize the performance of throughput of 6LoWPAN,a mechanism of channel competitive access based on sleep periods in super frame was proposed.Then a Markov chain model was established for MAC of 6LoWPAN and the mathematical derivation for the model was carried out.Furthermore,the numerical analysis of the channel throughput based on unsaturated traffic was carried out.And the impact of protocol parameters such as λ,NB and minBE to performance of throughput was researched.Finally,it is showed by the theoretical analysis the model can describe the mechanism of channel competitive access well and analyze the dynamic changes of the throughput accurately based on sleep mechanism.