Research Article
Adaptive Cross-layer Scheduling and Dynamic Subcarrier Allocation Algorithm Based on Service-differentiation in Multiuser OFDMA System
@INPROCEEDINGS{10.1109/CHINACOM.2007.4469567, author={Xuebing Pei and Gan Liu and Guangxi Zhu and Li Li}, title={Adaptive Cross-layer Scheduling and Dynamic Subcarrier Allocation Algorithm Based on Service-differentiation in Multiuser OFDMA System}, proceedings={2nd International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2008}, month={3}, keywords={CSI OFDMA cross-layer Scheduling fairness service-differentiation}, doi={10.1109/CHINACOM.2007.4469567} }- Xuebing Pei
Gan Liu
Guangxi Zhu
Li Li
Year: 2008
Adaptive Cross-layer Scheduling and Dynamic Subcarrier Allocation Algorithm Based on Service-differentiation in Multiuser OFDMA System
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2007.4469567
Abstract
In this paper scheduling algorithm utilizing channel status information(CSI) and dynamic allocation algorithm of subcarrier and power is investigated in orthogonal frequency division multiplexing access(OFDMA) system. To this end, based on service differentiation we develop an adaptive cross-layer scheduling scheme combined with dynamic subcarrier allocation algorithm according to instantaneous traffic load condition over wireless Rayleigh fading channel. The algorithm is designed to grant higher priority to realtime traffic packet of voice and multimedia than data packet, and dynamically allocate subcarriers for data service according to the packet number of each user in the buffer queue with fairness guarantee. The simulation result shows that the proposed adaptive cross-layer scheduling and dynamic subcarrier allocation algorithm has shorter delay for realtime traffic and higher spectral efficiency than nonadaptive scheduling algorithm in Rayleigh fading channel.