Power Minimization Based Resource Allocation for Interference Mitigation in OFDMA Femtocell Networks
Power Minimization Based Resource Allocation for Interference Mitigation in OFDMA Femtocell Networks
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DOI：
10.1109/jsac.2014.141213
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发表时间：
2014-02-01
影响因子：
16.4
通讯作者：
Claussen, Holger
中科院分区：
文献类型：
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作者：
Lopez-Perez, David;Chu, Xiaoli;Claussen, Holger
随着毫微微小区的引入，蜂窝网络正从传统的集中式网络架构移动到分布式网络架构，其中每个网络小区应当做出其自己的无线电资源分配决策，同时提供小区间干扰减轻。然而，实现这样的分布式网络架构不是一个简单的任务。在本文中，我们首先介绍了一个简单的自组织规则，基于最小化小区的发射功率，分布式蜂窝网络能够收敛到一个有效的资源重用模式。基于这种自组织规则，并考虑到现实的资源分配约束，我们还提出了两个新的资源分配算法，自治和协调，分别。所提出的自组织规则和资源分配算法的性能进行评估，使用系统级仿真，并表明，功率效率不一定是在网络级的容量改善冲突。所提出的资源分配算法提供了显着的性能改进，在用户中断和网络容量的前沿资源分配算法在文献中提出的。
With the introduction of femtocells, cellular networks are moving from the conventional centralized network architecture to a distributed one, where each network cell should make its own radio resource allocation decisions, while providing inter-cell interference mitigation. However, realizing such distributed network architecture is not a trivial task. In this paper, we first introduce a simple self-organization rule, based on minimizing cell transmit power, following which a distributed cellular network is able to converge into an efficient resource reuse pattern. Based on such self-organization rule and taking realistic resource allocation constraints into account, we also propose two novel resource allocation algorithms, being autonomous and coordinated, respectively. Performance of the proposed self-organization rule and resource allocation algorithms are evaluated using system-level simulations, and show that power efficiency is not necessarily in conflict with capacity improvements at the network level. The proposed resource allocation algorithms provide significant performance improvements in terms of user outages and network capacity over cutting-edge resource allocation algorithms proposed in the literature.