| 基于调和均值公平的多小区干扰协调功率分配算法 |
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| 作者姓名： | 徐茂 张光荣 陈晓辉 王卫东 |
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| 作者单位： | 中国科学技术大学无线网络通信安徽省重点实验室, 合肥 230027 |
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| 基金项目： | 国家自然科学基金(60802008)、新一代宽带无线移动通信网科技重大专项(2010ZX03003-002)和安徽高校省级自然科学研究重点项目(KJ2010A333)资助 |
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| 摘 要： | 针对正交频分多址无线蜂窝系统下行链路,提出一种基于用户速率调和均值公平的多小区干扰协调功率分配算法.为了优先减轻小区边缘用户的同频干扰,把多小区功率分配问题建模为一个以用户速率调和均值公平为目标的非凸优化问题,并提出一种迭代算法求其接近最优解.该算法需要相邻的基站通过交互干扰信息进行相互协作.仿真结果表明,该算法在保证小区中心用户有较高通信速率的同时,极大提升了小区边缘用户的通信速率.
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| 关 键 词： | 正交频分多址 多小区 小区间干扰协调 功率分配 调和均值公平 |
| 收稿时间： | 2011-05-16 |
| 修稿时间： | 2011-08-05 |
Multi-cell power allocation algorithm for interference coordination based on harmonic mean fairness |
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| Authors: | XU Mao ZHANG Guang-Rong CHEN Xiao-Hui WANG Wei-Dong |
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| Institution: | Wireless Information Network Laboratory, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | We propose a multi-cell power allocation algorithm based on harmonic mean fairness of users' rate for interference coordination in downlink OFDMA-based wireless cellular system. In order to mitigate the co-channel interference of cell edge users first, we formulate the multi-cell power allocation problem as a non-convex optimization problem with an objective of harmonic mean fairness of users' rate, and propose an iterative algorithm to work out the near-optimal solution to the problem. The algorithm requires cooperation between the adjacent base-stations by exchanging interference messages. Simulation results show that the proposed algorithm achieves a high data rate of cell center users, while greatly enhances the data rate of cell edge users. |
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| Keywords: | OFDMA multi-cell ICIC power allocation harmonic mean fairness |
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