Mobility

An Efficient Handoff Scheme for Multimedia Traffic in OFDMA System

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Executive Summary

The IEEE 802.16e Broadband Wireless Access (BWA) system is developed to cater for rapidly growing requirement for multimedia wireless services. Since the heterogeneous services provided by the system are connection-oriented, Call Admission Control and required resource reservation mechanisms are needed to achieve desired Quality of Service (QoS). Traditional admission control algorithms are based on bandwidth or channel reservation policy, which may be incompetent in IEEE 802.16e OFDMA systems for two reasons: WiMAX system supports dynamic and flexible resource allocation, and there exists a fundamental tradeoff between bandwidth resource and power resource.

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