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Traffic Control in a UMTS cell with static channels and traffic counts

Author(s): Anuj Kumar, Shilpi Srivastava, Alok Aggrawal and Narendra Kumar

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 3;
Start page: 266;
Date: 2013;
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Keywords: WCDMA | Local blocking probability and Call blocking probability

This paper describes & improvise Call Blocking Probability alculations , considering fixed number of channels & traffic generating sources in typical UMTS cell. More specifically , for uplink directions, a Loss Model (EnMLM) has been proposed by integrating it with local blocking aspects . As such the incoming call has to compete for the resources for it’s successful admission to a UMTS cell . In principle such admission of incoming call is controlled by availability of required channels . To analyze the system, an aggregate one-dimensional Markov chain has been formulated , and based on it, the system state probabilities has been determined by an efficient recurrent formula. Subsequently, the call blocking probabilities has been calculated in the uplink direction. By way of approach, the proposed model is approximate, however, its accuracy is found to be quite satisfactory. The evaluation of results has been done via simulation and results substantiate the findings of the basic call blocking probability calculations. Additionally, this model has much wider scope and it performs better than the existing model which assumes infinite number of traffic sources in the cell.
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