Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Throughput Maximization for Wireless Communication systems with
  Backscatter- and Cache-assisted UAV Technology   Unmanned aerial vehicle (UAV) has been widely adopted in wireless systems due
to its flexibility, mobility, and agility. Nevertheless, a limited onboard
battery greatly hinders UAV to prolong the serving time from communication
tasks that need a high power consumption in active RF communications.
Fortunately, caching and backscatter communication (BackCom) are appealing
technology for energy efficient communication systems. This motivates us to
investigate a wireless communication network with backscatter- and
cache-assisted UAV technology. We assume a UAV with a cache memory is deployed
as a flying backscatter device (BD), term the UAV-enabled BD (UB), to relay the
source's signals to the destination. Besides, the UAV can harvest energy from
the source's RF signals and then utilizes it for backscattering information to
the destination. In this context, we aim to maximize the total throughput by
jointly optimizing the dynamic time splitting (DTS) ratio, backscatter
coefficient, and the UB's trajectory with caching capability at the UB
corresponding to linear energy harvesting (LEH) and non-linear energy
harvesting (NLEH) models. These formulations are troublesome to directly solve
since they are mixed-integer non-convex problems. To find solutions, we
decompose the original problem into three subproblems, whereas we first
optimize the DTS ratio for a given backscatter coefficient and UB's trajectory,
followed by the backscatter coefficient optimization for a given DTS ratio and
UB's trajectory, and the UB's trajectory is finally optimized for a given DTS
ratio and backscatter coefficient. Finally, the intensive numerical results
demonstrate that our proposed schemes achieve significant throughput gain in
comparison to the benchmark schemes.

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The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th