A quality of service negotiation-based admission control scheme for WCDMA mobile wireless multiclass services

This paper introduces a new call admission control scheme. Quality of service (QoS) parameters are negotiated during the admission procedure at heavy loaded cells and maximum capacity is achieved. Blocking and dropping are used to prevent the system from an outage situation but their probability of occurrence is greatly reduced. Reservation bandwidth is used thoroughly as a means of improving overall QoS. Furthermore, the greatest common divisor of all the application load factors is considered as the resource unit, the resulting resource pool is identified and the performance of the above algorithms is analyzed using a novel multistep Markov analysis. The analysis takes account of classes without time restrictions, which are served with a pre-emptive system. Although the increased channel utilization of our proposed scheme reduces the available bandwidth for calls with pre-emption, we compensate for this loss using an extra reservation bandwidth. Blocking probability, dropping probability, average time delay in the queue, and channel utilization factor are used as benchmarks for the proposed schemes.