Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy Efficiency Optimization for Device-to-Device Communication
  Underlaying Cellular Networks in Millimeter-Wave   This paper studies energy efficiency maximization in device-to-device (D2D)
communications underlaying cellular networks in millimeter-wave (mm-wave) band.
A stochastic geometry framework has been used to extract the results. First,
cellular and D2D users are modeled by independent homogeneous Poisson point
process; then, exact expressions for successful transmission probability of D2D
and cellular users have been derived. Furthermore, the average sum rate and
energy efficiency for a typical D2D scenario have been presented. An
optimization problem subject to transmission power and quality of service
constraints for both cellular and D2D users has been defined and energy
efficiency of D2D communication is maximized. Simulation results reveal that by
working in millimeter-wave, significant energy efficiency improvement can be
attained, e.g., 20\% energy efficiency improvement compared to Rayleigh
distribution in the practical scenarios by considering circuit power. Finally,
to verify our analytical expressions, the simulation studies are carried out
and the excellent agreements have been achieved.

37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol