一种多中继协作系统中功率优化分配策略的无线网络容量算法研究

针对限制网络容量的主要因素（信道带宽与信道信噪比），本文提出了一种多中继协作系统中功率优化分配策略的无线网络容量算法。首先，论文提出采用多中继协作的方式，提高网络传输速率，建立网络最大流数学模型。然后，在网络总功率受限的情况下，对中继节点进行功率优化分配，建立最大化网络容量计算数学模型。最后，论文建立网络仿真环境，对比多中继协作且能量优化分配与非中继协作且能量等分两种策略在中断概率、网络容量等方面的表现。得出如下结论：网络容量随节点数量增加呈现先增后减的趋势，多中继协作且能量优化分配策略更加有利于提高无线网络容量。

An Improved Network Capacity Algorithm Based on Multi-relay cooperative for Wireless Networks

Channel bandwidth and signal to interference plus noise ratio(SINR)are the main factors that limit the network capacity. This paper proposes an improved wireless network capacity algorithm based on power distribution strategy optimization in multi relay cooperative system. Firstly,the paper uses the multi relay cooperative scheme to improve the network transmission rate and establish the network maximum flow model. Secondly,under the limita?tion of network power,the paper optimizes the power distribution of relay notes and establishes the network maxi?mum flow model. Finally,the paper compares the interrupt probability and network capacity performances under two different strategies,which are relay coordination and energy optimization allocation and non-relay coordination and equal energy allocation. The results show that with the increase of the number of nodes,the network capacity in?creases firstly and then decreases,and the multi relay cooperation and energy optimization allocation strategy is more beneficial to improve the capacity of wireless network.