Ενεργειακώς αποδοτικά δίκτυα ασύρματης πρόσβασης
Energy efficient wireless access networks

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Subject
Κινητά συστήματα επικοινωνίας ; Κινητή τηλεφωνία ; Ασύρματη επικοινωνία, Συστήματα της ; ΤηλεπικοινωνίεςKeywords
Κατανάλωση ενέργειας ; Ασύρματα δίκτυαAbstract
The aim of this thesis is to study the consumption of base stations of mobile
telephony and to propose solutions for further reduction of power consumption at
each base station.Studies that took place show that the global energy consumption
power of ICT technologies (Information and Communication Technologies) is
estimated about 600TWh about 3% of global energy consumption. If
this continues at such a pace, the energy consumption for ICT is
estimated that by 2030 consumption will surpass the 1700 TWHh.
This value is considered by many to be modest and efforts and
methods have started efforts to reduce the energy footprint. A great
part of ICT is cellular networks. The telecommunications providers
tried to get an enormous expansion of their networks in our country, in
order to get a very large percentage of geographic coverage and to
cover the needs of the users. Most providers are looking for methods
and techniques that will enable them to reduce power consumption.
Researches that took place is estimated that BTSs or Node Bs spend
over than 50% of the total energy of whole telecom network.For this
reason the effort to decrease the energy consumption has major
importance.
This thesis has four chapters. The first chapter is an introduction to
wireless mobile communications and a report to technologies of GSM,
GPRS and UMTS wireless communications.
In the second chapter a survey is performed on the categories of base
station and a description of their equipment and how they work.Also
techniques in order to reduce base station’s enegy are futher
mentioned.
In chapter three we describe a series of measurements for a period of
five days in order to have a correlation of erlangs and power
consumption and generally the continuously power consumption of
BTS during that period of time.
In the last chapter from the data that we collected from all the other
chapters we introduce an application based on a new idea in which
base stations are active when there is a growth of telecommunication
traffic otherwise they are disaybled. The aim is to achieve greater
energy savings.