【摘要】 针对LR-PON(长距离无源光网络)中ONU(光网络单元)的上行带宽分配问题,提出DBAPCP(基于流水周期轮询的动态带宽分配)算法;并使用OPNET软件对DBAPCP算法、IPACT(周期自适应交叉轮询)算法以及DBACP(基于周期轮询的动态带宽分配)算法进行建模仿真.由仿真结果可得:相比DBACP算法,DBAPCP算法提高了时延性能;相比IPACT算法,DBAPCP算法在高负载下,能够获得更低延时,并且能够更好地对区分等级业务进行支持.更多还原

【Abstract】 Upstream bandwidth allocation of ONU(optical network unit) on LR-PON(long reach passive optical network) was considered.A dynamic bandwidth allocation algorithm is proposed based on pipelined cyclic polling(DBAPCP).Then DBAPCP,IPACT(interleaved polling with adaptive cycle time) and DBACP(dynamic bandwidth allocation based on cyclic polling) algorithms were modeled and simulated by OPNET software.Compared with DBACP algorithm,the simulation results that DBAPCP improves delay performance with lower delay in high offered load and supports more differentiated classes of service than IPACT algorithm.更多还原