Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-Complexity Resource Allocation for Dense Cellular
  Vehicle-to-Everything (C-V2X) Communications   Vehicular communications are the key enabler of traffic reduction and road
safety improvement referred to as cellular vehicle-to-everything (C-V2X)
communications. Considering the numerous transmitting entities in next
generation cellular networks, most existing resource allocation algorithms are
impractical or non-effective to ensure reliable C-V2X communications which lead
to safe intelligent transportation systems. We study a centralized framework to
develop a low-complexity, scalable, and practical resource allocation scheme
for dense C-V2X communications. The NP-hard sum-rate maximization resource
allocation problem is formulated as a mixed-integer non-linear non-convex
optimization problem considering both cellular vehicular links (CVLs) and
non-cellular VLs (NCVLs) quality-of-service (QoS) constraints. By assuming that
multiple NCVLs can simultaneously reuse a single cellular link (CL), we propose
two low-complexity sub-optimal matching-based algorithms in four steps. The
first two steps provide a channel gain-based CVL priority and CL assignment
followed by an innovative scalable min-max channel-gain-based CVL-NCVL
matching. We propose an analytically proven closed-form fast feasibility check
theorem as the third step. The objective function is transformed into a
difference of convex (DC) form and the power allocation problem is solved
optimally using majorization-minimization (MaMi) method and interior point
methods as the last step. Numerical results verify that our schemes are
scalable and effective for dense C-V2X communications. The low-complexity and
practicality of the proposed schemes for dense cellular networks is also shown.
Furthermore, it is shown that the proposed schemes outperform other methods up
to %6 in terms of overall sum-rate in dense scenarios and have a near optimal
performance.

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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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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: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph