Supervisors info:
Λάζαρος Μεράκος, Καθηγητής, Πληροφορική και Τηλεπικοινωνιών, Εθνικό Καποδιστρικό Πανεπιστήμιο Αθηνών
Summary:
The aim of the thesis is to provide a comprehensive reference manual for the evolution of mobile communication systems. The first chapter introduces the reader to the first mobile communications networks from analogue communication to the Global System for Mobile Communications (GSM), which is the most widespread international network. It is the basis upon the next generation of networks has been developed. GSM introduced for the first time concepts such as SMS (Short Message Service), SIM (Subscriber Identity Module), tele-services. Then the 2.5G was appeared and included new protocols and systems. Thus, standards such as GPRS (General Packet Radio Service) and EDGE (Enhanced Data rates for GSM Evolution) have emerged from GSM. The 3rd and 3rd generation networks were developed in the next years and the differences between the previous generations were obvious. The second chapter introduces the basic representative of mobile communications today, LTE (Long-Term Evolution). This is the last step from cellular 3G services to 4G cellular. Further information on the advantages, the elements of the network architecture, the technical issues of the applications and the individual versions is given in this chapter. Thus, the transition from LTE to LTE-A network takes place by introducing more bandwidth and higher downlink and uplink speeds. It also introduces and analyzes the term of femtocells which offer larger capacity networks in an economically viable way. In addition, a high level of service quality is directly related to the acceptance by subscribers. However, there are certain disadvantages such as security, identification and synchronization. The third chapter analyzes the network that is expected to be appeared in the coming years. Based on the principles of previous networks, it will improve the weaknesses such as transmission rate, energy consumption, operating range and response time. Also a concise presentation of the network key elements as well as of the technologies associated with these networks. In addition, the first and second phases of the 5G - PPP are analyzed, which contain 19 and 21 new project proposals, respectively. In the fourth chapter, there are the conclusion and prospects of the 5th generation network. From a technological point of view, this network is expected in 2020. The design and the development of equipment (hardware and software) have already begun. Key features of the new network will be the fastest transmission rate, capacity and flexible architecture.
Keywords:
Telecommunication networks, 2G, 3G, 4G, 5G, LTE, LTE-A, 5G-PPP