Ενεργειακώς αποδοτικά δίκτυα ασύρματης πρόσβασης
Energy efficient wireless access networks
SubjectΚινητά συστήματα επικοινωνίας ; Κινητή τηλεφωνία ; Ασύρματη επικοινωνία, Συστήματα της ; Τηλεπικοινωνίες
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.