Advances in Wireless and Mobile Communications

Call Admission Control (CAC) protocol in mobile cellular networks is an important issue for Cellular Service Providers (CSP) to meet the ever increasing demand of bandwidth by the cutting edge mobile network applications like data, voice, MMS, online gaming, picture broadcasting etc. with scarce radio resource. This necessitates utilizing the last bit of bandwidth purchased and the development of highly efficient CAC protocols to handle very high surge of call rates despite of limited available bandwidth. Our new CAC protocol is based on categorization of calls into different call classes, revenue, preemption of non-prioritized active calls to admit prioritized new or handoff calls. This protocol also implements a call waiting threshold, which indicates the maximum allowable limit to hold a requesting call in a buffer until either the admission request is granted or the call is dropped. Performance evaluation is made through the simulation and results show minimum new and handoff call blocking probability, call dropping probability with maximum call completion probability and channel utilization.