HFC的MAC协议中随机访问机制性能分析

Performance Analysis of Random Access Mechanism in MAC Protocols Based on HFC Networks

为了在ＨＦＣ网络上实现交互式业务，人们对基于ＨＦＣ网络的介质访问协议进行了广泛的研究，已出现了几种基于ＨＦＣ的ＭＡＣ协议．这些ＭＡＣ协议基本上都采用了基于竞争的随机访问与预约相结合的协议，因此，基于竞争的随机访问机制的性能对整个协议的性能有非常大的影响．对基于ＨＦＣ网络的ＭＡＣ协议中竞争时隙所采用的随机访问机制的性能进行分析．首先给出随机访问机制的分析模型，然后求出了吞吐量通信量以及平均延时吞吐量的表达式．

Several medium access control protocols, proposed by researchers in order to support interactive services based on HFC networks, adapt to reservation protocol based on random access protocol So random access protocol's performance has great influence on MAC protocols This work analyses the performance of random access protocol adapted by MAC Protocols A random access protocol model is first introduced, and then is shown to offer traffic throughput and throughput delay characteristics