Analytical method of calculating blocking probability in 3G networks with spreading spectrum and a finite number of traffic sources
Maciej Stasiak, Arkadiusz Wiśniewski, Piotr Zwierzykowski · Theoretical and Applied Informatics · 2007
Admission control in wireless networks with the WCDMA radio interface admits or blocks new calls depending on a current load situation both in the access celi and in neighboring cells. A new cali is rejected if the predicted load exceeds particular thresholds set by radio network planning. This article presents a new blocking probability calculation method in cellular systems with the WCDMA radio interface for the uplink and the downlink directions. The model considers a finite and an infinite source population of users. In the model we use the load factor to estimate whether a new cali can be admitted or blocked. In the proposed calculation method the corresponding value of the load factor in the neighboring celi is based on the Okumura-Hata propagation model. The results of the analytical calculations are com-pared with the results of the simulation experiments, confirming the accuracy of the proposed method. The proposed scheme can be applicable for a cost-effective radio resource management in 3G mobile networks and can be easily applied to network capacity calculations.