| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 96 === In wireless communication, the number of channels allocate to each cell is limited, so how to use channel efficiently is an important topic. In our thesis, we study the call admission control in road topology based cellular networks, and we take the mobile communication information and position in adjacent cells into consideration. For each cell, we formulate the system by Markov Chain with two-dimensional states where the first dimension represents the base cell’s state and the second dimension stands for the adjacent cells’ state. The problem of minimizing a linear objective function of new call blocking rate and handoff call dropping rate can be formulated as a Markov Decision Process. In our model, we use several parameters to model our system, and these parameters are non-linear and difficult to measure and predict. How the model performs depending on whether these parameters are estimated precisely. In order to avoid our model very different from the reality, we use Cost Match Update (CMU) rule to help us to estimate parameter. In simulation result, it shows our proposed scheme has lower average cost than others.
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