An interactive QoS framework for fixed WiMAX networks

The IEEE 802.16 standard defines several scheduling classes at MAC layer for preferential treatment of service flows depending on QoS requirements specific to a service flow. In this paper, a new framework has been proposed to solve and address QoS issues for fixed point to multipoint (PMP) 802.16 systems. The proposed framework consists of a uplink scheduler and Call Admission Control (CAC) module. The proposed CAC module interact with the uplink scheduler status and makes its decision based on the scheduler’s queues status. Extensive OPNET simulation demonstrates the effectiveness of the proposed framework.