Inter-Cell Coordinated Resource Allocation for Mobile WiMAX System
Inter-Cell Coordinated Resource Allocation for Mobile WiMAX System
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DOI：
10.1109/wcnc.2009.4917759
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
Li Chen;Wenwen Chen;Xin Zhang;Yong Zhang;Cong Xiong;Dacheng Yang
中科院分区：
文献类型：
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作者：
Li Chen;Wenwen Chen;Xin Zhang;Yong Zhang;Cong Xiong;Dacheng Yang
OFDM技术已经成为Beyond- 3G的重要传输技术之一。移动的WiMAX是OFDM系统的典型代表。研究了OFDM系统小区间协同资源分配的跨层优化问题。我们首先分析了基于效用的方法的问题，并制定了这个优化问题。在此基础上，分别提出了多小区情况下的全局最优和次优小区间资源分配策略。最后以移动的WiMAX系统为例进行了系统级仿真评估。结果表明，该小区间资源分配策略能够在全网用户间实现较好的公平性。此外，小区间自适应功率分配可以提高吞吐量性能，同时考虑相邻小区的干扰。小区边缘吞吐量增益随着扇区内用户数的增加而减小。
OFDM has become one of the most important Beyond- 3G transmission technologies. Mobile WiMAX is a typical representative of OFDM systems. The cross-layer optimization problem of inter-cell coordinated resource allocation for OFDM systems is addressed in this paper. We first analyze the problem by utility-based method, and formulate this optimization problem. Then the globally optimal and a sub-optimal inter-cell resource allocation strategy are proposed respectively in multicell scenario. Finally, Mobile WiMAX system is taken as an example for evaluation by system level simulation. The results show that the inter-cell resource allocation strategy can achieve better fairness among users in the entire network. Besides, intercell adaptive power allocation can enhance the throughput performance while considering the interference of neighbor cells. And the cell-edge throughput gain decreases with the increase of the number of users in one sector.