2 research outputs found
Millimeter Wave LOS Coverage Enhancements with Coordinated High-Rise Access Points
Millimetre wave (mm-wave) communication is considered as one of the most
important enablers for the fifth generation communication (5G) system to
support data rate of Gbps and above. In some scenarios, it is crucial to
maintain a line of sight (LOS) link for users enjoying 5G immersive experiences
and thus requiring very high data rate. In this paper, we investigate the LOS
probability in mm-wave systems. In particular, we study the impact of access
point (AP) and blockage height on the LOS probability and propose a solution to
effectively enhance the LOS coverage by using high-rise APs on top of low-rise
APs normally installed on street furniture, e.g., lamp poles. Two deployment
options are explored: 1) irregular deployment and 2) regular deployment, where
LOS probability is derived for both cases. Simulation results show that the
impact of AP height on LOS probability is significant and using coordinated
high-rise APs jointly deployed with low-rise APs will substantially improve the
LOS probability.Comment: 6 pages, 9 figures, conferenc
Resilient Design of 5G Mobile-Edge Computing Over Intermittent mmWave Links
Two enablers of the 5th Generation (5G) of mobile communication systems are
the high data rates achievable with millimeter-wave radio signals and the
cloudification of the network's mobile edge, made possible also by Multi-access
Edge Computing (MEC). In 5G networks, user devices may exploit the high
capacity of their mobile connection and the computing capabilities of the edge
cloud to offload computational tasks to MEC servers, which run applications on
devices' behalf. This paper investigates new methods to perform power- and
latency-constrained offloading. First, aiming to minimize user devices'
transmit power, the opportunity to exploit concurrent communication links
between the device and the edge cloud is studied. The optimal number of
channels for simultaneous transmission is characterized in a deterministic and
a probabilistic scenario. Subsequently, blocking events that obstruct
millimeter-wave channels making them `intermittent' are considered. Resource
overprovisioning and error-correcting codes against asymmetric block erasures
are proposed to jointly contrast blocking and exploit multi-link
communications' diversity. The asymmetric block-erasure channel is
characterized by a study of its outage probability. The analysis is performed
in a framework that yields closed-form expressions. These, together with
corroborating numerical results, are intended to provide reference points and
bounds to optimal performance in practical applications.Comment: This paper was submitted to IEEE Transactions on Mobile Computing on
Dec. 21st, 201