Estimation of Blocking Performances in Mobile WiMAX Cellular Networks

In this paper, we have estimated new call block and handoff call drop performances in Cellular WiMAX. Call Admission Control (CAC) is the process of regulating voice communication, particularly in wireless mobile networks. Further it is a fundamental mechanism used for QoS provisioning in a network. It restricts the access to the network based on resource availability in order to prevent network congestion and service degradation for already supported users. CAC decides whether a new connection can be established or not. Permission is granted only when QoS requirement of the new incoming flow is met without degrading those of the existing flows. The IEEE802.16e standard support for handover (HO) and various services like with Unsolicited Grant Service (UGS), real-time Polling Service (rtPS), non-real-time Polling Service (nrtPS), Best-Effort (BE), and extended real time Polling Service (ertPS). The Quality-of-Service (QoS) parameters used are the new and handoff call blocking. In this paper we investigate the blocking performances of three channel assignment schemes in the context of Cellular WiMAX network. Numerical results are found including the performance of these schemes.