中文摘要：

为了解决分层网络中由于添加飞小区引起的一系列干扰问题，提出了一种飞小区基站的自配置功率机制。该机制首先分析了飞基站可能受到各种其他基站的干扰和引起对已有用户的干扰类型，然后设计了一个功率最优化问题，即在保证已有用户正常通信前提下最大化飞小区的系统容量，最后通过拉格朗日乘数法得到了功率白配置的最优解。仿真结果表明该机制对比于基于接收信号强度设置功率机制，有效降低了飞基站发射功率，提高了已有用户的吞吐量，减少了对已有用户的干扰。

英文摘要：

To solve the issue that new femtocells deployed in hierarchical networks would introduce a series of interfer- ence, a power self-configuration scheme was proposed. Various kinds of interference that femtocell base station might receive from other base stations were analyzed. Then an optimal power issue was formulized, as was able to maximize the femtocell system capacity on the condition guaranteeing the existing users＇ normal communication. And the optimal solution was also obtained with lagrange multiplier method. The simulation results show that the proposed scheme cuts down the transmit power of femtocell, increases the throughput and reduces interference for existing users, comparing with the scheme based on received signal strength.