Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Channel Selection Algorithm for Cognitive Radio Networks with
  Heavy-Tailed Idle Times   We consider a multichannel Cognitive Radio Network (CRN), where secondary
users sequentially sense channels for opportunistic spectrum access. In this
scenario, the Channel Selection Algorithm (CSA) allows secondary users to find
a vacant channel with the minimal number of channel switches. Most of the
existing CSA literature assumes exponential ON-OFF time distribution for
primary users (PU) channel occupancy pattern. This exponential assumption might
be helpful to get performance bounds; but not useful to evaluate the
performance of CSA under realistic conditions. An in-depth analysis of
independent spectrum measurement traces reveals that wireless channels have
typically heavy-tailed PU OFF times. In this paper, we propose an extension to
the Predictive CSA framework and its generalization for heavy tailed PU OFF
time distribution, which represents realistic scenarios. In particular, we
calculate the probability of channel being idle for hyper-exponential OFF times
to use in CSA. We implement our proposed CSA framework in a wireless test-bed
and comprehensively evaluate its performance by recreating the realistic PU
channel occupancy patterns. The proposed CSA shows significant reduction in
channel switches and energy consumption as compared to Predictive CSA which
always assumes exponential PU ON-OFF times.Through our work, we show the impact
of the PU channel occupancy pattern on the performance of CSA in multichannel
CRN.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
2
The categories of this paper are: math
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The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn