Efficient Bandwidth Management in Broadband Wireless Access Systems Using CAC-based Dynamic Pricing

While the demand for mobile broadband wireless services continues to increase, radio resources remain scarce. Even with the substantial increase in the supported bandwidth in next generation Broadband Wireless Access Systems (BWASs), it is expected that these systems will severely suffer from congestion due to the rapid increase in demand of bandwidth intensive applications. Without efficient bandwidth management and congestion control schemes, network operators may not be able to meet the increasing demand of users for multimedia services, and hence they may suffer immense amount of revenue loss. In this paper, we propose an admission-level bandwidth management scheme consisting of Call Admission Control (CAC) and dynamic pricing. The main aim of our proposed scheme is to provide monetary incentives to users to use the wireless resources efficiently and rationally, hence, allowing efficient bandwidth management at the admission level. By dynamically determining the prices of units of bandwidth, the proposed scheme can guarantee that the arrival rates to the system are less than or equal to the optimal ones computed dynamically, hence, guaranteeing a congestion-free system. Simulation results show the effectiveness and strengths of our proposed approach.