Mobility

Fair Adaptive Bandwidth and Subchannel Allocation in the WiMAX Uplink

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Executive Summary

In some modern communication systems, as it is the case of WiMAX, it has been decided to implement Demand Assignment Multiple Access (DAMA) solutions. End-users request transmission opportunities before accessing the system, which provides an efficient way to share system resources. In this paper, the authors briefly review the PHY and MAC layers of an OFDMA-based WiMAX system, and they propose to use a Network Utility Maximization (NUM) framework to formulate the DAMA strategy foreseen in the uplink of IEEE 802.16. Utility functions are chosen to achieve fair solutions attaining different degrees of fairness and to further support the QoS requirements of the services in the system.

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