A Cross-Layer Fair Resource Allocation Algorithm for OFDMA Systems
The rate adaptive resource optimization problem in OFDMA systems is addressed. A novel cross-layer subcarrier and bit allocation algorithm is proposed, which aims to maximize the system throughput with the overall transmit power constraint and user rate proportionality constraint. Different from existing non-cross-layer methods, the algorithm makes allocation policy based on not only channel condition but also queue status of each user. The algorithm consists of two steps. Firstly, subcarriers are assigned to users under the proportional rate constraint and queue length constraint, assuming that the power is uniformly allocated on each subcarrier. In the second step, the overall power is allocated via a proposed proportional greedy algorithm, with the consideration of buffer state information as well, which can increase the power usage efficiency in some cases. Simulation results show that the proposed cross-layer algorithm achieves a better performance than existing non-cross-layer algorithms.
Peng Cheng Guanding Yu Zhaoyang Zhang Peiliang Qiu
Institute of Information and Communication Engineering Zhejiang University, Hangzhou, China 310027
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
1342-1346
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）