On Delay-Bounded Multimedia Internet-Call Access Control in a WCDMA Common Channel

We address call access control in the Wideband Code Divisional Multiple Access (WCDMA) downlink common channels. Proposed is a policy consisting of two phases, the first screening calls for admission, and the second scheduling call services according to the most popular preemptive FIFO rule. The scheduling mechanism is first depicted on the infinite vertical time-strip with width representing the aggregate capacity of common channels, by denoting a call service as positioning the corresponding call-rectangle thereon. Enabled by this depiction, we apply the existing results on the two-dimensional (2-D) bin packing problem in predicting the sojourn time of an arriving call. The first phase of call admission control is based on the predictions, from the characteristics of which calls, once admitted, are guaranteed to be serviced within allowable delay. The performance of the proposed access control policy is extensively tested with realistic input data. The results are found convincingly affirmative for its practical applicability