Distributed Uplink Power Control for Optimal SIR Assignment in Cellular Data Networks
Distributed Uplink Power Control for Optimal SIR Assignment in Cellular Data Networks
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DOI：
10.1109/infocom.2006.248
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发表时间：
2006-04
期刊：
影响因子：
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通讯作者：
P. Hande;Sundeep Rangan;Mung Chiang
中科院分区：
文献类型：
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作者：
P. Hande;Sundeep Rangan;Mung Chiang
在无线蜂窝网络中，经典的功率控制算法在实现固定的SIR目标方面具有广泛的适用性。本文提出了一种分布式机制，联合优化SIR分配和发射功率在多蜂窝网络。由于移动的站之间的干扰，并非所有的SIR分配都是可行的。我们提供了一个新的表征的可行的SIR区域的基站上的负载和潜在的干扰从移动的站，我们长期溢出的指示。基于这个特征，我们首先开发了一个分布式算法，可以实现任何Paretooptimal SIR分配。接下来，我们提出了一个效用最大化的问题，最大化的网络范围内的标准，并提出了一种算法，分布式优化的SIR分配的帕累托最优点。我们克服了集中式计算的瓶颈，通常需要这样的网络效用的优化，利用新的负载溢出特性。扩展到功率约束和interferenceconstrained的情况下进行。收敛性和最优性证明，以及使用3GPP上行链路评估工具的仿真例子。
The classical power control algorithms in wireless cellular networks have found wide applicability in attaining fixed SIR targets. This paper presents a distributed mechanism to jointly optimize SIR assignment and transmitted power in a multicellular network. Not all SIR assignments are feasible due to interference between mobile stations. We provide a new characterization of the feasible SIR region in terms of the loads on the base stations and an indication of the potential interference from mobile stations which we term spillage. Based on this characterization, we first develop a distributed algorithm that can achieve any Paretooptimal SIR assignment. Next, we pose the problem of maximizing a network-wide criterion as a utility maximization problem and present an algorithm that distributively optimizes the SIR assignment over the Pareto-optimal points. We overcome the bottleneck of centralized computation typically required for such an optimization of a network utility by exploiting the new load-spillage characterization. Extensions to power-constrained and interferenceconstrained cases are carried out. Convergence and optimality proofs as well as simulation examples using 3GPP uplink evaluation tools are presented .