优化的EPON多播QoS DBA实现研究

Research on an optimal QoS DBA implement mechanism of EPON multicast

使用经济模型定义了一个基于多播业务的网络属性、用户属性和市场属性的多播QoS优先级算法,基于多播QoS优先级,实现对多播业务动态的带宽分配,较好地解决了传统的基于网络优先级的QoS DBA机制"低效益问题"和"高丢包率"问题。对无序和变长的Ethernet下行以太帧进行了基于QoS优先级别有序和定长改进,有效消除了时延抖动问题。仿真实验结果很好地验证了本机制的优点。

By referring to economic mode, a QoS priority algorithm for EPON multicast was introduced based on its network attribute, user attribute and market attribute. Based on the multicast QoS priority, the network bandwidth was dynamically allocated among multicast services. It could overcome the disadvantages of lower benefit and higher loss rate of package in the network-priority-based QoS mechanism. It effectively reduced delay jitter of package by reshaping the variable-length and disorderly Ethemet downstream frame into the constant-length and orderly one. The simulation result verifies its merits well.