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Distributed power control and scheduling for decentralized OFDMA networks

机译:分散式OFDMA网络的分布式功率控制和调度

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In this paper, the downlink power control problem in decentralized orthogonal frequency division multiple access (OFDMA) networks is addressed. First, the optimization problem which minimizes the overall transmission power subject to individual rate and power constraints in a decentralized network is considered. An optimal solution requires global link information. However, obtaining such information is almost impossible. This paper introduces a power control and scheduling algorithm which can be implemented in a distributed manner. This algorithm delivers suboptimal solutions, since it is based on local information. However, simulation results show that the suboptimal solutions obtained through this algorithm are close to the global optimum, as long as it exists. Furthermore, it is shown that the obtained solutions are very similar to the ones obtained through a central controller.
机译:本文解决了分散正交频分多址(OFDMA)网络中的下行链路功率控制问题。首先,考虑优化问题,该问题使分散网络中受个体速率和功率约束的总传输功率最小。最佳解决方案需要全局链接信息。但是,获取此类信息几乎是不可能的。本文介绍了一种可以以分布式方式实现的功率控制和调度算法。由于该算法基于本地信息,因此它提供的解决方案不理想。但是,仿真结果表明,只要存在,通过该算法获得的次优解就接近于全局最优。此外,示出了所获得的解决方案与通过中央控制器所获得的解决方案非常相似。

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