本文讨论了EPON MAC中的测距技术、上行带宽分配算法及ONU的软、硬件实现方案。由于E－PON的MAC协议还在讨论之中，所以EPON MAC中的其他问题还有待于进一步研究探讨，软硬件实现还有待专用芯片的推出和IP核心的研制，EPON真正走上市场，还需广大科研人员付出艰苦的努力-This article discusses the distance EPON MAC technology, upstream bandwidth allocation algorithm and ONU software and hardware implementation. The E-PON of the MAC protocol is still under discussion, so the other issues EPON MAC needs further study, yet to be dedicated hardware and software to achieve the introduction of chip and IP core development, EPON really took to the market, the need to the majority of researchers painstaking efforts