长距离EPON的研究

目前的EPON协议规定了EPON最长传输距离与差分距离均不得超过20km，本文探讨了长距离EPON的实现方法。通过对EPON物理子层和MPMC（Multi～point MACConrtol多点MAC控制）子层的部分修改可以实现60km甚至80km的传输距离。

The maxim and difference distance of EPON was specified no more than 20km in IEEE802.3-2008. This paper discusses the long-distance EPON implementations. Through change EPON physical sublayer and MPMC （Multi-point MAC Conrtoll） sub-layer, transmission distance of 60km or 80km is achievable.