Device-to-Device Communication in 5g Cellular Networks: Challenges, Solutions, and Future Directions

TEHRANI_LAYOUT.qxp_Layout 5/7/14 12:50 PM Page 86


Device-to-Device Communication in
5G Cellular Networks: Challenges,
Solutions, and Future Directions
Mohsen Nader Tehrani, Murat Uysal, and Halim Yanikomeroglu

In a conventional cellular system, devices are
not allowed to directly communicate with each
other in the licensed cellular bandwidth and all
communications take place through the base stations. In this article, we envision a two-tier cellular network that involves a macrocell tier (i.e.,
BS-to-device communications) and a device tier
(i.e., device-to-device communications). Device
terminal relaying makes it possible for devices in
a network to function as transmission relays for
each other and realize a massive ad hoc mesh
network. This is obviously a dramatic departure
from the conventional cellular architecture and
brings unique technical challenges. In such a
two-tier cellular system, since the user data is
routed through other users’ devices, security
must be maintained for privacy. To ensure minimal impact on the performance of existing
macrocell BSs, the two-tier network needs to be
designed with smart interference management
strategies and appropriate resource allocation
schemes. Furthermore, novel pricing models
should be designed to tempt devices to participate in this type of communication. Our article
provides an overview of these major challenges
in two-tier networks and proposes some pricing
schemes for different types of device relaying.


Mohsen Nader Tehrani is
with the University of
Murat Uysal is with
Özyegin University.
Halim Yanikomeroglu is
with Carleton University.


With the introduction of a myriad of smart handheld devices, user demands for mobile broadband are undergoing an unprecedented rise. The
drastic growth of bandwidth-hungry applications
such as video streaming and multimedia...