With the development of passive optical network, different standards will occur in the same network topology. Virtualization technology is a preferable solution for multi-standard coexistence. In this paper, priority-based mode transformation algorithm is proposed for cross-standard bandwidth management in multisystem-based virtual passive optical network (VPON) in metro-access optical network (MAON). It is aimed to improve the fairness between priority services as well as the utilization of network resources. According to service lever agreement (SLA), priority services are divided into three categories: Expedited Forwarding (EF), Assured Forwarding (AF) and Best Effort (BE). For the first time, a model transformation scenario that requires consideration of priority is analyzed. Under the model transformation scenario, multi-dimension 0/1 knapsack models of the priority-based mode transformation algorithm are established. By solving the model, an optimal combination of ONUs for mode transformation can be found. Finally, the simulation shows that the priority-based mode transformation algorithm and the single ONU mode transformation algorithm differ in the amount of each service’s transformation bandwidth. It further demonstrates the contribution of the proposed algorithm in fairness.

随着无源光网络的发展，在同一网络拓扑中会出现不同的标准。虚拟化技术是实现多标准共存的首选解决方案。针对城域接入光网络（MAON）中基于多系统的虚拟无源光网络（VPON）中的跨标准带宽管理，提出了一种基于优先级的模式转换算法。目的是提高优先服务之间的公平性以及网络资源的利用。根据服务杠杆协议（SLA），优先级服务分为三类：快速转发（EF），保证转发（AF）和尽力而为（BE）。首次分析了需要考虑优先级的模型转换场景。在模型转换场景下，建立了基于优先级的模式转换算法的多维0/1背包模型。通过求解模型，可以找到用于模式转换的ONU的最佳组合。最后，仿真表明，基于优先级的模式转换算法和单个ONU模式转换算法在每种服务的转换带宽量上有所不同。它进一步证明了该算法在公平性方面的贡献。