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首页> 外文期刊>IEEE transactions on wireless communications >Iterative Multi-Level Soft Frequency Reuse With Load Balancing for Heterogeneous LTE-A Systems
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Iterative Multi-Level Soft Frequency Reuse With Load Balancing for Heterogeneous LTE-A Systems

机译:异构LTE-A系统中具有负载平衡的迭代式多级软频率复用

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摘要

This paper deals with the planning of two-layer long-term evolution-advanced cellular systems, taking both the co-tier and cross-tier interference into account. In particular, we propose the novel multi-level soft frequency reuse (MSFR) scheme, where the users in three different regions of a macro/micro cell adopt distinct frequency segments and different transmission power levels. The optimization of power control parameters and cell association with MSFR results in a non-convex problem. We present the iterative-MSFR (I-MSFR) scheme, where the main optimization problem is divided into two sub-problems that can be subsequently solved by means of classical optimization methods. Finally, we propose two simplified schemes that achieve a comparable performance as I-MSFR in terms of utility, cell capacity, and outage conditions. I-MSFR and the simplified schemes have shown better performance than other schemes in the literature.
机译:本文研究了两层长期演进高级蜂窝系统的规划,同时考虑了共层干扰和跨层干扰。特别是,我们提出了一种新颖的多级软频率重用(MSFR)方案,其中宏/微蜂窝小区三个不同区域的用户采用不同的频率段和不同的发射功率电平。功率控制参数的优化以及与MSFR的单元关联会导致非凸问题。我们提出了迭代MSFR(I-MSFR)方案,其中主要的优化问题分为两个子问题,这些问题随后可以通过经典的优化方法解决。最后,我们提出了两个简化的方案,它们在效用,电池容量和中断条件方面均可以达到与I-MSFR相当的性能。 I-MSFR和简化方案已显示出比文献中其他方案更好的性能。

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