Modeling of handover initiation in a multicell system scenario

A model is provided for the analysis of handover initiation algorithms in cellular systems. An extension of the Vijayan and Holtzman´s (see IEEE Trans. on Vehic. Technol., vol.42, no.8, p.351, 1993) model is achieved, which accounts for: (a) the effects of the angular direction when a mobile moves from a current to a target base station, (b) the presence of more than two base stations, as in actual cellular environments, (c) the effects of cross-correlation of shadow fadings affecting the links between the mobile terminal and the various base stations. From the results it is seen that, for a typical trajectory of the mobile terminal from the current base station, the number of handover might be sensibly increased due to the presence of disturbant stations. Moreover, a further increase is usually observed when cross-correlation is also accounted for