| Summary: | With popular Wi-Fi applications (i.e. wireless LANs) especially after hot-spot deployment, more reliable wireless broadband technology for internet access attracts great interest. IEEE 802.16 technology is attractive in a wide variety of environments, and becomes a potential candidate to satisfy the requirements of high data rate and wide coverage in the next generation wireless communication system.
IEEE 802.16e, the enhanced version of IEEE 802.16, is a promising system to provide broadband wireless access for wide area mobile communications, support both fixed and mobile broadband wireless access.
Application end-to-end performance in wireless networks is critical to user experience. WiMAX is designed to support a large set of existing and emerging applications, such as Voice-Over-IP (VoIP). All the applications have different Quality of Service (QoS) requirements. Different techniques at the Media Access Control (MAC) layer are used to handle different service classes.
In this project, a QoS solution incorporating a dynamic call admission control (CAC) scheme and a bandwidth allocation algorithm is proposed for WIMAX mobile application with different threshold values are set for different service classes. The relationship between the channel utilization, the dropping and blocking probability versus traffic loads has been investigated. The effectiveness of the proposed methods is evaluated through discrete simulation, and the simulation is done under Qualnet environment.
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