On the optimum spectrum partitioning in a microcell/macrocell cellular layout with overflow
Lauro Ortigoza-Guerrero, A.H. Aghvami · 2002
An analytical method to find the optimal spectrum partitioning for a system of microcells and their overlaying macrocells is presented. The spectrum partitioning is calculated based on the blocking probability in each layer ensuring a grade of service of 2% and allowing overflow traffic from microcells to macrocells. The teletraffic analysis is based on a multidimensional birth and death process. The calculation assumes perfect assignment of mobiles to each of the layers according to their speeds (i.e. the probability of erroneous assignment of a call is insignificant). The model is general and any velocity probability density function in the system could be used to assess the blocking probability in each layer. The spectrum partitioning method could be dynamically implemented.