Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Efficient, Fair and QoS-Aware Policies for Wirelessly Powered
  Communication Networks   Wireless power transfer (WPT) is a viable source of energy for wirelessly
powered communication networks (WPCNs). In this paper, we first consider WPT
from an energy access point (E-AP) to multiple energy receivers (E-Rs) to
obtain the optimal policy that maximizes the WPT efficiency. For this purpose,
we formulate the problem of maximizing the total average received power of the
E-Rs subject to the average and peak power level constraints of the E-AP. The
formulated problem is a non-convex stochastic optimization problem. Using some
stochastic optimization techniques, we tackle the challenges of this problem
and derive a closed-form expression for the optimal solution, which requires
the explicit knowledge of the distribution of channel state information (CSI)
in the network. We then propose a near-optimal algorithm that does not require
any explicit knowledge of the CSI distribution and prove that the proposed
algorithm attains a near-optimal solution within a guaranteed gap to the
optimal solution. We next consider fairness among the E-Rs and propose a
quality of service (QoS) aware fair policy that maximizes a generic network
utility function while guaranteeing the required QoS of each E-R. Finally, we
study a practical wirelessly powered communication scenario in which the E-Rs
utilize their energy harvested through WPT to transmit information to the E-AP.
We optimize the received information at the E-AP under its average and peak
transmission power constraints and the fairness constraints of the E-Rs.
Numerical results show the significant performance of our proposed solutions
compared to the state-of-the-art baselines.

20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph