Abstract:
Device-to-device (D2D) communication underlying
cellular networks, allows direct transmission between two devices
in each other’s proximity that reuse the cellular resource
blocks in an effort to increase the network capacity and
spectrum efficiency. However, this imposes severe interference
that degrades the system’s performance. This problem may be
circumvented by incorporating fractional frequency reuse (FFR)
or soft frequency reuse (SFR) in OFDMA cellular networks.
By carefully considering the downlink resource reuse of the D2D
links, we propose beneficial frequency allocation schemes, when
the macrocell has employed FFR or SFR as its frequency reuse
technique. The performance of these schemes is quantified using
both the analytical and simulation results for characterizing
both the coverage probability and the capacity of D2D links
under the proposed schemes that are benchmarked against the
radical unity frequency reuse scheme. The impact of the D2D
links on the coverage probability of macrocellular users (CUs) is
also quantified, revealing that the CUs performance is only
modestly affected under the proposed frequency allocation
schemes. Finally, we provide insights concerning the power
control design in order to strike a beneficial tradeoff between
the energy consumption and the performance of D2D links.
