Analytical approaches to the modeling of mobile personal communication systems.

摘要

Mobile personal communication networks mainly consist of Base Stations (BSs) acting as network access nodes, and fixed networks interconnecting BSs. Each BS has a communications domain within which a mobile user can communicate with it if spectrum is available. In spite of users' arrivals and departures to and from BSs' domains, uninterrupted communication is possible through the application of a handover mechanism. Network modeling can further help the analysis of intercommunications peculiarities among heterogeneous network parts and to propose new solutions to enhance the overall performance. The aim of this thesis is the modeling of information exchanged between base stations and corresponding mobile users through the application of simulation and mathematical approaches. In particular, the thesis defines different views concerning the analysis of mobile Personal Communication Systems (PCSs) in the context of handover mechanism to bring about a new queueing model with speed factor as an auxiliary parameter. It then concentrates the user's point of view of the overlapping region and the relative method of priority assignment, the specification of an n-dimensional approach to the handover issue, and the construction of an equivalent queueing model of proposed location update tree structures. The thesis then shows the dependence of the queueing model performance on the users' population as well as speed. The n-dimensional approach is further employed to describe the static and dynamic channel allocation from a combinatorial point of view based on users' point of view and product spaces. Finally, the thesis concentrates on traffic generation in the context of Asynchronous Transfer Mode for both Bernoulli and ON-OFF sources.*.;*Originally published in DAI Vol. 58, No. 1. Reprinted here with corrected author name.