磁盘部分覆盖问题的近似算法设计

Bin Xiao, Jiannong Cao, Qingfeng Zhuge, Yi He, E. Sha
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引用次数: 19

摘要

建立移动服务器,为预期区域内的移动节点提供服务。如果可以预见移动节点的分布,那么移动服务器的位置对无线系统的QoS至关重要。在资源和拓扑约束下,很难找到解决方案,或者无法在有限数量的移动服务器中覆盖所有给定的移动节点。在本文中,我们研究了部分覆盖问题,使得部分移动节点被覆盖。提出了几种近似算法来覆盖元素的最大数量。对于实时系统,如战场通信系统,所提出的算法具有多项式时间复杂度,可以有效地应用。算法复杂度分析说明了算法的改进。实验结果表明,我们的算法在鲁棒k中心问题上的性能远远优于现有的3-逼近算法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Approximation algorithms design for disk partial covering problem
Mobile servers are established to provide services for mobile nodes in an anticipated area. If the distribution of mobile nodes can be foreseen, the location of mobile servers becomes critical to the QoS of wireless systems. Under resource and topology constraints, it is very difficult to figure out a solution, or unable to cover all given mobile nodes within limited number of mobile servers. In this paper, we study the issue of the partial covering problem such that part of mobile nodes to be covered. Several approximation algorithms are proposed to cover the maximum number of elements. For real time systems, such as the battlefield communication system, the proposed algorithms with polynomial-time complexity can be efficiently applied. The algorithm complexity analysis illustrates the improvement made by our algorithms. The experimental results show that the performance of our algorithms is much better than other existing 3-approximation algorithm for the robust k-center problem.
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