PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

Coordinating concurrent transmissions: a constant-factor approximation of maximum-weight independent set in local conflict graphs
Petteri Kaski, Aleksi Penttinen and Jukka Suomela
In: 6th International Conference on Ad-Hoc Networks & Wireless (AdHoc-NOW), 24-26 Sep 2007, Morelia, Mexico.


We study the algorithmic problem of coordinating transmissions in a wireless network where radio interference constrains concurrent transmissions on wireless links. We focus on pairwise conflicts between the links; these can be described as a conflict graph. Associated with the conflict graph are two fundamental network coordination tasks: (a) finding a nonconflicting set of links with the maximum total weight, and (b) finding a link schedule with the minimum total length. Our work shows that two assumptions on the geometric structure of conflict graphs suffice to achieve polynomial-time constant-factor approximations: (i) bounded density of devices, and (ii) bounded range of interference. We also show that these assumptions are not sufficient to obtain a polynomial-time approximation scheme for either coordination task.

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EPrint Type:Conference or Workshop Item (Paper)
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Theory & Algorithms
ID Code:3015
Deposited By:Jukka Suomela
Deposited On:24 July 2007