基于CWDM的EPON MAC层技术研究

Design of MAC based on CWDM for EPON

针对基于时分复用的EPON不能充分利用光纤资源的问题,提出了一种结合CWDM和EPON技术的低成本多波长EPON系统。分析了系统MAC层技术的变化,探讨了ONU注册、测距和上行带宽分配方案,设计了一种适用于多波长EPON系统的动态带宽分配算法。仿真结果表明该算法能充分利用多波长EPON的带宽资源,具有高效性。

For TDM-based EPON can not make full use of the fiber resouces,this artical proposes a low cost muti-wavelength systerm which combinates technologies of CWDM and EPON.Analyzies the changes of MAC layer technology and discusses the scheme of ONU registration,Ranging and the bandwith allocation in upstream channel.At last this article proposes a DBA algorithm which is used in multi-wavelength EPON. The results of the simulation show that this algorithm can take the advantage of multi-wavelength EPON and gain a good bandwidth utilization efficiency.