Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analysis of Multi-Messages Retransmission Schemes   Hybrid Automatic ReQuest (HARQ) protocol enables reliable communications in
wireless systems. Usually, several parallel streams are sent in successive
timeslots following a time-sharing approach. Recently, multi-layer HARQ has
been proposed by superposing packets within a timeslot. In this paper, we
evaluate the potential of this multi-layer HARQ by playing with some design
parameters. We show that a gain in throughput is only obtained at
mid-Signal-to-Noise Ratio (SNR).

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The categories of this paper are: patt-sol
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: econ