现有的策略管理框架PBNM不仅存在着策略决策点负担过重、容易形成单点瓶颈等缺陷，同时还缺乏与SLA管理的紧密结合和具体实现。-PBNM existing policy management framework is not only the existence of an excessive burden on policy decision point, easy to form defects such as single point of bottleneck, but also the lack of close integration with SLA management and implementation.