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IEEE802.17弹性分组环是宽带城域网的新型技术。凭着本地公平算法、空间重利用、带宽统计复用、正常状态双环均传输业务等特点从而和传统环网相比,弹性分组环在带宽利用方面具有较大的优势。公平算法对弹性分组环发挥其带宽利用优势具有极其重要的作用,而目前的基于节点公平算法不能完全发挥弹性分组环的优势。文章在更能发挥弹性分组环带宽利用优势的基于流的公平策略的基础上,建立相应的算法方案,并进行计算机仿真验证。实验结果验证了理论分析。
IEEE802.17 flexible packet ring is a new type of broadband MAN technology. With the characteristics of local fairness algorithm, space reuse, bandwidth statistics multiplexing, and normal state dual-ring transmission service, the flexible packet ring has greater advantages in bandwidth utilization compared with the traditional ring network. The fairness algorithm plays an extremely important role for the flexible packet ring to exert its bandwidth utilization advantage. However, the current node-based fairness algorithm can not fully utilize the advantages of flexible packet ring. On the basis of the fair flow based strategy which can give full play to the advantages of elastic packet ring bandwidth utilization, this paper establishes the corresponding algorithm scheme and verifies it by computer simulation. Experimental results verify the theoretical analysis.