Modelling restricted accessibility for wireless multi-service systems

Some fundamental aspects of restricted availability and accessibility for multi-rate traffic are clarified. In classical teletraffic models all connections have the same bandwidth demand. In service-integrated systems each service has individual bandwidth requirement. For example in CDMA systems we may experience blocking (outage) even if the nominal capacity of a cell has not been fully used, because the actual capacity depends on interference from neighboring cells. Therefore, calls will experience individual accessibility. This paper presents a new theory and model for this problem. The model preserves the reversibility and insensitivity and generalizes the basic knowledge of classical teletraffic models. The theory is illustrated by a WCDMA traffic model.