Analytical method of calculating blocking probability in 3G networks with spreading spectrum and a finite number of traffic sources

M. Stasiak, A. Wiśniewski, P. Zwierzykowski

Abstract


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 arę 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.

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ISSN: 1896-5334 (print), 2300-889X (online)

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