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Class-based service connectivity using adaptive guard channel reservation in wireless networks

To reach the satisfied level of quality of service (QoS) for the maximum number of users, maximum bandwidth utilization is not the only key issue to be considered, some other factors like call dropping probability, call blocking probability, and overall connection blocking rate etc. are also needed to keep under deliberation. To accommodate large number of calls and to increase the utilization of bandwidth the proposed (Adaptive-Guard-Band model) is introduced. This proposed model is able to provide guard band for different classes of users as per as requirement with handover calls as highest priority. In this paper, we propose an adaptive guard band scheme which shows that the guard band allocations are dynamic in nature and it becomes changing as priority basis giving first priority to the handover calls. The proposed scheme considers call type, existing occupied channels, and average call life time to calculate the guard band reservation for different type of calls. The numerical and analytical results show that the proposed scheme provides negligible handover call dropping probability (HCDP) and satisfactory range of new call blocking probability (NCBP) as well as attain a significant increase in bandwidth utilization (BWU) while overall connection blocking rate (OCB) stays within reasonable range.