CALL BLOCKING ANALYSIS IN WCDMA CELL

Abstract

WCDMA is the air interface for UMTS which is a 3G standard technology. When traffic offered to the system increases there would come a situation that the system cannot handle any more call, this is known as call blocking. Analysis of call blocking is very necessary to plan new network as well as for the upgrade of existing network. In WCDMA, different services like emergency call, voice call, video call and data are categorized in different service classes with different priorities. In this study three classes of traffic is taken into consideration. Blocking analysis in terms of probability has been done in this research by introducing a term known as BBU (Basic Bandwidth Unit) which is the basis for dimensioning of traffic as well as capacity of the system. In this thesis “Call blocking analysis in WCDMA cell”, change in blocking probability has been studied by fully-availability group approximation of WCDMA cell with change in offered traffic per BBU. The result shows that FAG approximation of WCDMA cell is an easy tool to analyze the capacity of a WCDMA cell.