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| A Cross-Layer Scheduling Algorithm for Downlink of Multi-user OFDM System |
| Ma Yue-huai①②; Zhang Dong-mei①; Cai Yue-ming①; Xu You-yun① |
①Department of Radio Communication, ICE, PLAUST, Nanjing 210007, China;
②Satellite Staff Room, Communication Training Base of General Staff Headquarters, Xuanhua 075100, China |
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Abstract A cross-layer scheduling algorithm for downlink of multi-user OFDM system is proposed, the algorithm considers user’s QoS requirement, fairness, packet queue state information of MAC layer and channel state information, power constraint of physical layer. Multi-user OFDM system can make efficient use of different parameter characters of the both layers through the proposed algorithm, to achieve the goal of guarantee user’s QoS and maximize wireless resource utility efficiency. Simulation results show that when mobile users have different receive SNR, the proposed algorithm has steady QoS, low drop rate and low complexity.
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Received: 26 September 2006
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2008, Vol. 30 
