Evaluation of handover blocking probabilities for cellular mobile communications networks

摘要

This paper proposes and analyzes a queueing network model of a cellular mobile communications network including multi-way connection, which has been considered in past researchers. This model is formulated as a queueing network with multiple call classes and state-dependent transition rates. As the performance measure a handover blocking probability is evaluated based on the product form equilibrium distribution and the constraint matrix whose elements consist of the arrival and service rates for individual cells. As a numerical example, an 8-cell cellular system is considered and blocking probabilities for a 2-way handover between adjacent cells are calculated for several network loads and constraint matrices. Since results present the characteristics depending on an individual cell or a service area, it can be emphasized that this model is useful for the control of QoS taking account of the spatial traffic.