Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Trajectory Optimization for Rotary-Wing UAVs in Wireless Networks with
  Random Requests   This paper studies the trajectory optimization problem in a scenario where a
single rotary-wing UAV acts as a relay of data payloads for downlink
transmission requests generated randomly by two ground nodes (GNs) in a
wireless network. The goal is to optimize the UAV trajectory in order to
minimize the expected average communication delay to serve these random
requests. It is shown that the problem can be cast as a semi-Markov decision
process (SMDP), and the resulting minimization problem is solved via
multi-chain policy iteration. The optimality of a two-scale optimization
approach is proved: the optimal trajectory in the communication phase greedily
minimizes the communication delay of the current request while moving between
the current start position and a target end position (inner optimization); the
end positions are selected to minimize the expected average long-term delay in
the SMDP (outer optimization). Numerical simulations show that the expected
average delay is minimized when the UAV moves towards the geometric center of
the GNs during phases in which it is not actively servicing transmission
requests, and demonstrate significant improvements over sensible heuristics.
Finally, it is revealed that the optimal end positions of communication phases
become increasingly independent of the data payload, for large data payload
values.

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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat