Performance of a Hierarchical Cellular Network with Mobility-Dependent Hand-Over Strategies

Xavier Lagrange (1) , Philippe Godlewski (2)

1 ENST - Ecole Nationale Supérieure des Télécommunications
2 LTCI - Laboratoire Traitement et Communication de l'Information

This contribution deals with the blocking probability in a hierarchical network with two mobility behaviors. A continuous coverage is achieved with micro-cells that accommodate both fresh calls and handover requests. Over this micro-cell coverage umbrella-cells, which only accept handover, are implemented. At every handover, the sojourn time of the terminal in the cell is measured. If it is lower than a threshold, the terminal is considered as rapid and directed towards an umbrella cell. Otherwise the communication stays at the microcell level. Furthermore, if there is no available channel in a micro-cell, the call is handed over the corresponding umbrella-cell. The strategy tends to favor handover to umbrella-cells for high-speed terminals. An analytical model for the teletraffic performance is developed and used to calculate the forced termination probability in different configurations. The performance of the strategy is then studied

Domaines: Analyse numérique [cs.NA]

Xavier Lagrange, Philippe Godlewski. Performance of a Hierarchical Cellular Network with Mobility-Dependent Hand-Over Strategies. Proceedings of the IEEE Vehicular Technology Conference, Apr 1996, Atlanta, United States. pp.1868 - 1872, ⟨10.1109/VETEC.1996.504082⟩. ⟨hal-02295429⟩