Design considerations for multi-layered mobile communications systems

In a multi-layered third generation system which is over laid with pico cells, micro cells, macro cells and mega cells; the propagation characteristics are expected to impose stricter requirements in relation to handover, channel assignment and cell grouping than for the current systems. It is therefore important that these issues be addressed when modeling the third generation systems. This paper identifies design parameters which need consideration, describes a teletraffic model suitable for such a multi-layer system and presents preliminary results of computer simulation using the model to study the performance improvements associated with a multi-layered system.