Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modulation Compression in Next Generation RAN: Air Interface and
  Fronthaul trade-offs   Modulation compression is a technique considered in the recent Open-RAN
(O-RAN) framework, which has continued the 3GPP effort towards the definition
of new virtualized and multi-vendor RAN architectures. Basically, fronthaul
compression is achieved by means of reducing the modulation order, thus
enabling a dramatic reduction of the required fronthaul capacity with a simple
technique. In this work, we provide a survey of the architectures, functional
splits, and fronthaul compression techniques envisioned in 3GPP and O-RAN.
Then, we focus on assessing the trade-offs that modulation compression exhibits
in terms of reduced fronthaul capacity versus the impact on the air interface
performance, through a dynamic multi-cell system-level simulation. For that, we
use an ns-3 based system-level simulator compliant with 5G New Radio (NR)
specifications and evaluate different traffic load conditions and NR
numerologies. In a multi-cell scenario, our results show that an 82% reduction
of the required fronthaul capacity can be achieved with negligible air
interface performance degradation by reducing the modulation order down to
64QAM, for different numerologies and load conditions. A higher modulation
order reduction without degradation is permitted in low/medium traffic loads
(reaching up to 94% fronthaul capacity reduction).

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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg