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对采用静态时隙结构的EPON系统如何与高度突发数据业务相结合进行了研究。并用OPNET创建了一个采用静态时隙分配(SSA)的上行系统,且确定合适的参数进行了EPON系统性能的仿真分析。仿真结果表明:基于SSA的EPON显然不适合高突发与高负载的业务流,但在负载小于0.47时,该系统性能良好。在长距离的情况下,基于动态带宽分配(DBA)的EPON轮询周期较长,使得系统效率降低,因而在长距离情况下建议采用静态带宽分配(SBA)算法。
How the EPON system adopting the static time slot structure is combined with the highly burst data service has been studied. And use OPNET to create an uplink system using static time slot allocation (SSA), and determine the appropriate parameters of EPON system performance simulation analysis. The simulation results show that EPON based on SSA is obviously not suitable for high burst and high load traffic, but the system performance is good when the load is less than 0.47. In the case of long distance, EPON polling period based on Dynamic Bandwidth Allocation (DBA) is longer, resulting in lower system efficiency, so Static Bandwidth Allocation (SBA) algorithm is recommended for long distance.