摘要
提出一种在WiMAX系统资源紧张时,使接纳率和资源利用率最大化的呼叫接纳控制CAC(Call Admission Control)算法。算法基于经济学概念,利用基尼系数(Gini Coefficient)给出了接纳控制模型,并用修正的sigmoid函数计算接纳概率。根据接纳概率决定是否接纳新到业务。仿真结果表明,算法与典型的截止优先权算法相比,在系统繁忙时系统接纳率和资源利用率都有较大提高。
A CAC （Call Admission Control） algorithm is proposed with maximizing the system＇s admission rate and resource utilization when WiMAX system is busy. Firstly, admission control model is presented using Gini coefficient based on economic concepts. Then, the algorithm calculates admission probability using modified sigmoid function. Finally, according to the admission probability, the system decides whether to accept new business. Simulation results show that： compared with the typical cut-off pri- ority algorithm, the admission rate and resource utilization are greatly enhanced in new algorithm when the system is busy.
出处
《电子技术应用》
北大核心
2010年第9期138-141,共4页
Application of Electronic Technique
基金
科技部国际合作与交流专项(2009DFA12120)
国家自然科学基金项目(60671037)
宁波市工业攻关国际合作项目(2007B10051)
