FERMI: a femtocell resource management system forinterference mitigation in OFDMA networks
FERMI: a femtocell resource management system forinterference mitigation in OFDMA networks
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DOI：
10.1145/2030613.2030617
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发表时间：
2011-09
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通讯作者：
Mustafa Y. Arslan;Jongwon Yoon;K. Sundaresan;S. Krishnamurthy;Suman Banerjee
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作者：
Mustafa Y. Arslan;Jongwon Yoon;K. Sundaresan;S. Krishnamurthy;Suman Banerjee
对提高频谱效率的需求正在推动下一代宽带接入网络朝着部署具有复杂空中接口技术（正交频分多址或OFDMA）的较小小区（毫微微小区）的方向发展。然而，计划中的毫微微蜂窝基站的密集部署使得干扰和资源管理变得至关重要且极具挑战性。在本文中，我们设计和实现的第一个资源管理系统，FERMI，基于OFDMA的毫微微蜂窝网络。作为其设计的一部分，FERMI（i）在频域中提供资源隔离（ii）使用测量驱动的触发器来智能地区分仅需要链路自适应的客户端和需要资源隔离的客户端;（iii）结合了能够在同一帧中联合调度两种类型的客户端的机制;以及（iv）采用有效的、可缩放的算法来确定在整个网络上具有高利用率和低开销的公平资源分配。我们实现FERMI的原型四细胞WiMAX毫微微蜂窝测试平台，并表明它产生显着的收益超过传统的方法。
The demand for increased spectral efficiencies is driving the next generation broadband access networks towards deploying smaller cells (femtocells) with sophisticated air interface technologies (Orthogonal Frequency Division Multiple Access or OFDMA). The projected dense deployment of femtocells however, makes interference and hence resource management both critical and extremely challenging. In this paper, we design and implement one of the first resource management systems, FERMI, for OFDMA-based femtocell networks. As part of its design, FERMI (i) provides resource isolation in the frequency domain (as opposed to time) to leverage power pooling across cells to improve capacity; (ii) uses measurement-driven triggers to intelligently distinguish clients that require just link adaptation from those that require resource isolation; (iii) incorporates mechanisms that enable the joint scheduling of both types of clients in the same frame; and (iv) employs efficient, scalable algorithms to determine a fair resource allocation across the entire network with high utilization and low overhead. We implement FERMI on a prototype four-cell WiMAX femtocell testbed and show that it yields significant gains over conventional approaches.