一种基于转制阈值的VPON跨制式动态带宽调度算法

VPON cross-system DBA algorithm based on transfer-system threshold

跨制式动态带宽调度(DBA)是提高未来多种技术制式并存网络环境下网络资源利用率的关键技术。文中提出了一种利用阈值触发转制调度的跨制式DBA算法,实现了不同制式系统间的负载均衡,提高了全网吞吐量。然而,跨制式调度在引入新的调度维度的同时,也增加了调度复杂度,针对该问题进一步提出一种基于效用函数的阈值寻优算法,用于平衡负载均衡收益及调度成本间的矛盾。仿真结果表明,所提DBA算法配合阈值寻优算法可在维持较低调度成本下使得全网吞吐量提升近13%,同时稳定时延在理想范围内。

Under the multi-system coexistence environment in the future, cross-system DBA algorithm will be the key technology to improve network resource utilization. This paper presents a sort of cross-system DBA algorithm to transfers the system triggered by threshold, thus it achieves the load balance of different systems and increases network throughput. However, cross-system DBA makes scheduling more complex while it applies new dimensions. Aimed at the problem, cross-system DBA gives a threshold optimization algorithm based on utility function. The algorithm can equilibrate the load balance profit and scheduling cost. Simulation result shows that DBA algorithm can increase 13% of network throughput by lasting low scheduling cost while the delay is in ideal range.