International Journal of Mobile Network Design and Innovation
A QoS-aware resource allocation scheme with limited feedback in downlink OFDMA systems
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
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GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Slow adaptive OFDMA via stochastic programming
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Optimal resource management in OFDMA wireless networks to support multimedia traffic
Proceedings of the 2010 ACM multimedia workshop on Mobile cloud media computing
Quality-driven scheduling for Long-Term Evolution system
International Journal of Mobile Communications
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This paper proposes an adaptive radio resource allocation (ARRA) algorithm for downlink OFDMA/SDMA systems with multimedia traffic. Considering multiple service classes and diverse QoS requirements of multimedia traffic, the ARRA algorithm is designed with the goal to maximize spectrum efficiency and to fulfill quality of service (QoS) requirements. It is composed of two parts, a dynamic priority adjustment (DPA) scheme and a priority-based greedy (PBG) scheme. The DPA adopts a type of time-to-expiration to indicate the degree of user's urgency, and dynamically gives high priorities to urgent users. The PBG allocates the radio resource iteratively, based on a cost value, to maximize the system throughput while allocating enough resource to high-priority users. Simulation results show that the ARRA algorithm outperforms conventional algorithms in terms of system throughput and satisfaction extent of QoS requirements; it can sustain users' QoS requirements up till a traffic load of 0.8, while the conventional algorithms cannot guarantee QoS requirements after a traffic load of 0.3.