ADAPTIVE TRAFFIC ADMISSION FOR INTEGRATED SERVICES IN CDMA WIRELESS-ACCESS NETWORKS

We consider the issue of bandwidth management in a code-division multi ple-access (CDMA) integrated wireless-access network with heterogeneou s services, A framework for adaptive connection admission in the up-li nk direction is proposed. It is based on estimation of the interferenc e at the base station receivers, The estimation algorithm employs a li near Kalman filter which is driven by a measurement of the interferenc e and by predicted traffic parameters of the admitted connections, We derived several generic variants of the control architecture for the u p-link direction to assess the main characteristics of the framework a nd to determine the trade-offs between complexity and performance, The y vary from a fixed strategy with fixed power control to an adaptive s trategy with full information about network state and adaptive power c ontrol, A numerical study of the proposed framework shows that the est imated value of the average interference adapts well to the real value under nonstationary and nonuniform environment. This feature results in high network utilization for arbitrary traffic conditions.