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arXiv 0711.3247cs.NI
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分布式动态频率分配算法

A Distributed Dynamic Frequency Allocation Algorithm

Behtash Babadi, Vahid Tarokh

摘要:

我们考虑一个网络模型,其中的节点被分组到一些集群,并提出了一个分布式的动态频率分配算法,实现性能接近的集中式优化算法。每个集群基于其所经历的干扰的知识来选择其传输频带。证明了所提出的分布式算法收敛到一个次优频率分配模式。对于网络中簇的空间分布的一些特定情况,算法的性能上的渐近界的推导和比较的最佳集中式解决方案的性能。这些分析结果和额外的仿真研究验证了性能接近的最佳集中式频率分配算法。它表明,该算法实现了约90%的香农容量对应的最佳/接近最佳的集中式频带分配。此外,我们考虑的情况下,每个集群可以在主动或非主动模式,根据两个状态的马尔可夫模型。我们推导出条件,以保证有限的稳态方差的算法使用随机分析的输出。进一步的仿真研究证实了随机建模的结果和算法在时变设置中的性能。

英文摘要:

We consider a network model where the nodes are grouped into a number of clusters and propose a distributed dynamic frequency allocation algorithm that achieves performance close to that of a centralized optimal algorithm. Each cluster chooses its transmission frequency band based on its knowledge of the interference that it experiences. The convergence of the proposed distributed algorithm to a sub-optimal frequency allocation pattern is proved. For some specific cases of spatial distributions of the clusters in the network, asymptotic bounds on the performance of the algorithm are derived and comparisons to the performance of optimal centralized solutions are made. These analytic results and additional simulation studies verify performance close to that of an optimum centralized frequency allocation algorithm. It is demonstrated that the algorithm achieves about 90% of the Shannon capacities corresponding to the optimum/near-optimum centralized frequency band assignments. Furthermore, we consider the scenario where each cluster can be in active or inactive mode according to a two-state Markov model. We derive conditions to guarantee finite steady state variance for the output of the algorithm using stochastic analysis. Further simulation studies confirm the results of stochastic modeling and the performance of the algorithm in the time-varying setup.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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