Abstract
This paper proposes a channel allocation scheme for Wide-Area Low-Rate
Wireless Personal Area Networks (LR-WPAN) based on a cooperative
centralized spectrum sensing approach. We refer here to a three-tiers
LR-WPAN architecture, where we can distinguish the sensor devices level,
the Child-coordinators level and, finally, the super LR-WPAN coordinator
level. In the proposed scheme, channels allocation is performed by the
LR-WPAN coordinator upon receiving the spectrum sensing reports from the
Child-coordinators. The performance of the proposed scheme is evaluated in
terms of resulting detection probability and throughput, in a scenario
where ISM bands are saturated and different LR-WPANs compete to the channel
access. Performance comparisons with a classical scheme where the channel
allocation is accomplished without performing spectrum sensing, are also
presented in order to highlight the advantages of the proposed scheme.
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