摘要： 描述了IEEE 802.16e协议中功率控制机制的实现原理和流程并在此基础上提出了基于位置信息的功率控制算法。仿真结果表明：与不区分位置的功率控制算法相比，该算法降低了小区边缘用户对其他小区的干扰水平，以牺牲极小吞吐量为代价，使系统中断概率在小区中用户数较多时仍然保持在5％，优于其他算法。

关键词: 功率控制, 位置信息, 正交频分复用

Abstract: This paper describes the implementation principle and flow of power control mechanism in IEEE 802.16e protocol. A power control algorithm based on the position information is proposed. Simulation results demonstrate that, at the expense of sacrificing small throughput, the proposed algorithm reduces the interference from the users on the edge of a cell to other neighboring cells. Subsequently, the blocking probability of the entire system is reduced dramatically when the number of users in a cell is huge, at the level of about 5%. This effect is especially obvious by comparing the new algorithm with the formal algorithms, which does not distinguish the positions.

Key words: power control, location information, OFDM

中图分类号: 

• TP393