Teletraffic analysis of a hierarchical cellular network
نویسنده
چکیده
This contribution deals with the blocking probability in a hierarchical network. In the considered model, a continuous coverage is made with micro-cells that accommodate both fresh calls and handover requests. Over this micro-cell coverage, umbrella-cells are implemented. These umbrella-cells only accept handover requests that cannot be managed by micro-cells. This hierarchy enables to reduce the handover failure probability. First the blocking probability in the micro-cells is calculated. By modelling the handover flow from micro-cells to umbrella-cells as a Markov Modulated Poisson Process (MMPP), the blocking probability may be approximated. The probability that a call is dropped before completion is then calculated. The analysis is compared with a computer simulation. The benefits of a two layer coverage (micro-cells and umbrellacells) are studied for various mobility factors. Table of contents
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