A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs
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hdl:2117/7205
Tipus de documentText en actes de congrés
Data publicació2009
Condicions d'accésAccés obert
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Abstract
Channel allocation problem is a major challenge in
wireless local area networks (WLANs), especially in dense
deployments of access points (APs) where congestion of the
unlicensed spectrum bands (i.e., ISM bands) could undermine
achieved network performance. This paper analyses the
possibility to alleviate congestion of the ISM band by allowing
some APs to use additional channels located in licensed bands in
an opportunistic manner whenever licensee services (i.e.,
primary users) are not affected. Availability of these additional
channels in licensed bands is assumed not to be the same for all
the APs. Based on this assumption, we formulate the problem for
the channel assignment as a Binary Linear Programming (BLP)
problem, which allows us to obtain an optimal solution despite an
elevated execution time. We also develop a heuristic method
based on building a Minimum Spanning Tree (MST) graph
attending to interference conditions that is able to find nearoptimal
solutions with a shorter execution time. Results are
provided to assess the benefits of such a proposal under different
WLAN deployment situations and primary channel availability
conditions.
CitacióNovillo, F. [et al.]. A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs. A: IEEE International Symposium on Wireless Communication Systems. "6th IEEE International Symposium on Wireless Communication Systems". Siena: 2010, p. 468-472.
ISBN978-1-4244-3583-8
Versió de l'editorhttp://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05285281&tag=1
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