Soft capacity modeling for third generation radio resource management

This paper discusses wireless capacity models and capacity utilization models for 3G (WCDMA) system analysis. The soft capacity of a 3G cell is formulated as a function of bandwidth and interference, and the capacity utilization of an individual user is formulated as a function of the user´s traffic class, activity factor, and negotiated QoS. Examples are provided for the uplink of a 3GPP W-CDMA cell which includes dedicated traffic channels (DCH), shared traffic channels (CPCH), and control channels (DPCCH). The usefulness of the capacity models is shown by simulation analysis, using JavaSim, of admission control protocols. Visualization of 3-D volumes illustrates the capacity consumption of individual traffic classes.