NDLI: A constant approximation algorithm for link scheduling in arbitrary networks under physical interference model

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A constant approximation algorithm for link scheduling in arbitrary networks under physical interference model

Content Provider	ACM Digital Library
Author	Xu, XiaoHua Tang, ShaoJie
Abstract	Link scheduling is crucial in improving the throughput in wireless networks and it has been widely studied under various interference models. In this paper, we study the link scheduling problem under physical interference model where all senders of the links transmit at a given power P and a link can transmit successfully if and only if the Signal-to-Interference-plus-Noise-Ratio (SINR) at the corresponding receiver is at least a certain threshold. The link scheduling problem is to find a maximum "independent set" (MIS) of links, i.e., the maximum number of links that can transmit successfully in one time-slot, given a set of input links. This problem has been shown to be NP-hard [10]. Here we propose the first link scheduling algorithm with a constant approximation ratio for arbitrary background noise N ≥ 0. When each link l has a weight w(l)>0, we propose a method for weighted MIS with approximation ratio O(min(log $max_{ι∈L}$ $w(ι)/min_{ι∈L}$ w\|\|ι\|\|, log $max_{ι∈L}$ $w(ι)/min_{ι∈L}$ w\|\|ι\|\|, where \|\|ι\|\| is the Euclidean length of a link ι.
Ending Page	20
Page Count	8
Starting Page	13
File Format	PDF
ISBN	9781605585239
DOI	10.1145/1540343.1540347
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-05-18
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Link scheduling Independent set Approximation algorithm. Physical interference model
Content Type	Text
Resource Type	Article

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