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Ad Hoc网络是干扰受限系统,为了获得较高的网络传输容量,需要引入合适的功率控制策略,降低网络中的干扰。分数阶功率控制是一种新型的功率控制策略,是对信道反转功率控制的改进。这里推导分数阶功率控制时的中断概率和传输容量的n阶近似表达式,研究了n阶近似表达式的准确度,讨论了分数阶功率控制相对于信道反转功率控制对网络性能的改进。通过研究表明,适当的选择合适的分数阶功率控制系数可以使得中断概率最小,传输容量最大。
Ad Hoc networks are interference limited systems. In order to obtain high network transmission capacity, appropriate power control strategies need to be introduced to reduce interference in networks. Fractional power control is a new type of power control strategy, which is an improvement of channel inversion power control. Here, we derive the n-th order approximation of the outage probability and the transmission capacity in fractional-order power control. We study the accuracy of the n-order approximation expression and discuss the improvement of the performance of the fractional-order power control over the channel inversion power control. The research shows that proper selection of appropriate fractional power control coefficients can minimize the probability of outage and maximize the transmission capacity.