Probabilistic Call Admission Control in Wireless Multiservice Networks

Abstract In this project a general formula for Call Admission Control schemes was derived taking into considerationthe support of the multimedia services which is essential in new generation networks. Where every serviceClass (SC) is prioritized independently, and found the Call Blocking Probability (CBP) for both single andmultiple SCs. Markov Chains theory was used to model the CAC system to generate CBP formula, then itwas simulated using MATLAB taking many values of Channels regarding to Erlang values. I. Motivation (Background) R adio Resources Management (RRM) plays a vital role into the process of enhancement of(Qos) into both wired and wireless networks , it is important since the need to an acceptableresources utilization that has a direct effect into network performance parameters likeProbability of blocking/dropping calls , network revenues and into signal to noise ration especiallyinto (3G) networks which depends on a soft capacity algorithms where the congestion degradesthe signal level to other users , these networks depends mainly on the offering of multimediaservices such as voice, video, data, and audio with various QoS profiles .Control Admission Control (CAC) is one of the most important factor that is used into RadioResource Management (RRM), and has been receiving a great deal of attention during the last twodecades due to the growing popularity of wireless communications. It has a central role CAC inQoS provisioning in terms of the signal quality, call blocking and dropping probabilities.The main idea of the CAC is to manage the blocking and acceptance process for the calls based ona predefined criteria. If a defined limit is reached or exceeded, a new call may be blocked to beaccessed to the network until at least one current call terminates,Alternatively, a gracefuldegradation methodology can be implemented. This means that the audio quality of individualcalls can deteriorate to a certain extent before new calls are denied entry.