QoS provisioning for multiple non-real-time services in cellular wireless networks

Future mobile services are expected to include various non-voice oriented services. One important category of non-voice oriented mobile services is non-real-time services. When a mobile user establishes a connection to access non-real-time service, the mobile user usually cares about whether the total time to complete its data transfer is within its time tolerance. In addition, different mobile users may have different bandwidth requirements and different tolerances in the total completion time. It is essential for wireless systems to provide various mobile users with different total completion times. In this paper, two quality-of-service (QoS) metrics, called stretch ratio and eligibility percentage, are employed at a connection level to present the degree of the length of the total completion time. We devise a measurement based call admission control scheme that provides multiple QoSs for various mobile users which have different requirements of stretch ratios, eligibility percentages, and bandwidths. Extensive simulation results show that the measurement based call admission control scheme not only provides various satisfactory QoSs for mobile users but also produces high throughput. Copyright (C) 2010 John Wiley & Sons, Ltd.