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arXiv 1605.01752cs.DS
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两种功率水平传感器网络对称连通性的最小功率范围分配

Minimum Power Range Assignment for Symmetric Connectivity in Sensor Networks with two Power Levels

Stefan Hoffmann, Egon Wanke

摘要:

本文研究了无线传感器网络中每个节点的传输功率分配问题。目标是最小化总功耗,同时确保得到的通信图是连接的。我们专注于此范围分配(RA)的问题,其中有两个不同的功率水平的限制版本。我们只考虑对称的传输链路,以允许容易地与通常需要两个相邻节点之间的双向通信的低级无线协议集成。我们引入了一个参数化的多项式时间近似算法的性能比任意接近$π^2/6$。此外,我们给出了一个几乎线性的时间近似算法的紧质量界的$7/4$。

英文摘要:

This paper examines the problem of assigning a transmission power to every node of a wireless sensor network. The goal is to minimize the total power consumption while ensuring that the resulting communication graph is connected. We focus on a restricted version of this Range Assignment (RA) problem in which there are two different power levels. We only consider symmetrical transmission links to allow easy integration with low level wireless protocols that typically require bidirectional communication between two neighboring nodes. We introduce a parameterized polynomial time approximation algorithm with a performance ratio arbitrarily close to $π^2/6$. Additionally, we give an almost linear time approximation algorithm with a tight quality bound of $7/4$.

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