Dynamic resource allocation and activity management for improving energy efficiency and fairness in 5G heterogeneous networks
Author
Far, Amir Behrouzi
Advisor
Karaşan, Ezhan
Date
2016-09Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
The higher energy consumption of Heterogeneous Networks (HetNet) compared
to Macro Only Networks (MONET) raises a great concern about the energy
e ciency of HetNets. In this thesis a dynamic activation strategy is proposed
which changes the state of small cells between Active and Idle according to the
dynamically changing user tra c in order to increase the energy e ciency of
HetNets. Moreover, both inter-tier and inter-cell resource allocations are adjusted
dynamically. The proposed strategy, Dynamic Bandwidth Allocation Dynamic
Activation (DBADA), is applied in a small cell deployment where HotSpot regions
are located at the cell edge and a small cell is located at the center of each
HotSpot. The objective is to maximize the sum utility of the network with
minimum energy consumption. To ensure proportional fairness in the network,
the logarithmic utility function is employed. To evaluate the performance of
the DBADA strategy over the proposed network topology, the median and 10-
percent rates and the energy consumed per unit of these metrics are studied.
Our simulation results reveal that the DBADA strategy can achieve the highest
median and 10-percent rates among other scenarios. In addition, compared to
always active scenario for small cells, DBADA decreases the energy consumption
per unit of median and 10-percent rates by at least 26% and 21%, respectively.
Keywords
Heterogeneous NetworksSmall cell
Dynamic activity management
Dynamic resource allocation
Proportional fairness
Energy e ciency