Title :
A frequency domain scheduling algorithm for IEEE 802.16 OFDMA systems
Author :
Zheng, Yousi ; Zhong, Xiaofeng ; Wan, Lei ; Kang, Jianfeng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
AMC (adaptive modulation and coding) is an important technology adopted by IEEE 802.16. Based on AMC, we introduce a frequency domain scheduling and subchannel resource allocation algorithm (FDSA) in this paper for IEEE 802.16 OFDMA systems. According to this algorithm which is applied in physical layer, the paper also proposes a simple AMC link adaptive mechanism. In different conditions, the throughput performance simulation results among PUSC, AMC without FDSA, and AMC with FDSA are also shown in both downlink (DL) mode and uplink (UL) mode. Comparison among this mechanism with AMC under other modulations and code rates and PUSC shows link adaptive mechanism can give a dramatic improvement for IEEE 802.16 OFDMA systems.
Keywords :
OFDM modulation; WiMax; adaptive codes; adaptive modulation; channel allocation; frequency division multiple access; frequency-domain analysis; modulation coding; resource allocation; scheduling; AMC link adaptive mechanism; FDSA; IEEE 802.16 OFDMA systems; WiMax; adaptive coding; adaptive modulation; downlink mode; frequency domain scheduling algorithm; physical layer; subchannel resource allocation algorithm; uplink mode; Communication standards; Constraint optimization; Frequency domain analysis; Job shop scheduling; Modulation coding; Performance analysis; Quality of service; Resource management; Scheduling algorithm; Throughput; AMC; IEEE 802.16; frequency domain scheduling algorithm; link adaptive mechanism;
Conference_Titel :
Wireless and Optical Communications Networks, 2009. WOCN '09. IFIP International Conference on
Conference_Location :
Cairo
Print_ISBN :
978-1-4244-4704-6
Electronic_ISBN :
978-1-4244-3474-9
DOI :
10.1109/WOCN.2009.5010524
