Call Admission Control for 3G wireless Mobile Cellular Network
Shruti B. Deshmukh, Vidya V. Deshmukh · 2013
a call admission control (CAC) algorithm used for WCDMA prioritized uplink for UMTS. It which combines QoS tolerance and service differentiation by priority for voice, data, multimedia respectively. This CAC algorithm gives preferential treatment to high priority calls, such as soft handoff calls, New call request, by reserving some bandwidth margin (soft guard channel) , Power consumption, no. of users ( load ) to reduce handoff failure, New call failure. In addition, queuing is also used to enhance the service quality. The algorithm uses the effective load as an admission criterion and applies different thresholds for new calls, handoff calls, bandwidth requirement, power consumption. Finally, the study considers three types of services: voice, data and multimedia calls. Use of CAC algorithm indicate that this algorithm reduces the probability of drop handoff calls and increases the total system capacity and performance; hence the GoS of the system can significantly be improved especially in case of high mobility environments.