计算机科学 ›› 2014, Vol. 41 ›› Issue (5): 102-106.doi: 10.11896/j.issn.1002-137X.2014.05.022
羊秋玲,金志刚,黄向党
YANG Qiu-ling,JIN Zhi-gang and HUANG Xiang-dang
摘要： 利用比例积分微分(PID)控制理论控制IP语音(VoIP)数据流带宽需求和用户体验(QoE)之间的平衡关系,并将该信息纳入带宽再分配模型中,提出一个基于QoE的带宽分配机制QBAV(QoE-based bandwidth allocation mechanism for VoIP application),它在满足用户期望QoE的同时兼顾带宽分配的公平性。理论证明该算法满足非线性问题最优化约束条件,所分配带宽满足目标函数全局收敛。仿真结果表明,该算法分别以低于传统NRG算法9%及最新FC-MDI-S算法15%的带宽满足了90%以上用户的期望QoE,避免了现有带宽分配机制针对小部分高优先级数据流的弊端,提高了VoIP业务的整体性能及网络利用效率。
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