Αρχιτεκτονική διαχείρισης για ετερογενή περιβάλλοντα ασύρματων επικοινωνιών υψηλών ταχυτήτων τέταρτης γενιάς
Management architecture for heterogeneous high-speed fourth generation wireless communications environments
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Subject
Wireless communication systems ; Αρχιτεκτονική ηλεκτρονικών υπολογιστών ; Heterogeneous computingAbstract
The heterogeneous high-speed 4th generation wireless communications environments call for advanced management functionality. In this thesis, a management architecture is presented as a means to guide both reconfigurable Radio Access Networks and cognitive Mobile Terminals (MT) in such a challenging environment. The architecture effectuates combined optimized spectrum and radio resource utilization, by optimally exploiting the diversity of the heterogeneous radio ecosystem. Specifically, the management architecture determines the proper operating RAT and frequencies for each managed RAN (optimized spectrum utilization), and directs MTs to the selection of the appropriate RAN to operate with (optimized radio resource utilization). The management architecture, regarding the issue of radio resource selection, focuses on the policy-based, distributed decision-making between network and terminals. Two slightly differentiated approaches for the functional architecture are presented analytically, as well as the correlation of their functional elements. This correlation demonstrates the possibility of the necessary cooperation and interoperability of the two architectures. For the architecture that was adopted as base for the continuance of the research, the information flow between the functions that comprise the central management entity of the architecture, and the information flow between the central management system and the external entities are presented. In the sequel, based on the presented information flow, the messages that are exchanged between the central management entity and the managed entities were determined in terms of elementary procedures (the included basic parameters of the messages and their structure), and their anticipated size is estimated. The determination of the procedures and the estimation of their anticipated size, constitute the base for the implementation of the corresponding interfaces. The realization of the interfaces necessitates the determination of proper mechanisms and information exchange protocols for the effectuation of the aforementioned procedures. In this framework, the basic requirements for the effectuation of the interfaces, as well as candidate solutions are presented. Moreover, assessment of the management architecture, regarding the evaluation of the performance of the architecture and the estimation of the management burden, which is induced by the incorporation of the described management functionality into the network, is effectuated. The assessment results prove the efficiency of the management architecture, as well as its viability.
Language
GreekCollections
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Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 4.0 Διεθνές
Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 4.0 Διεθνές