Abstract—In this paper, we propose an uplink (UL) scheduling algorithm for Mobile WiMAX (IEEE 802.16e) system that satisfies the throughput and delay for the real and non real time application taking the adaptive modulation and coding scheme (MCS) into consideration. The proposed algorithm works by adjusting the threshold which is imposed on the nrtPS queue. The threshold value here represents the number of bandwidth request messages in the nrtPS queue. The algorithm then allocate the resources in two stages: The inter-class scheduling allocates the resources to different classes of service in accordance to the threshold based priority while the intra-class scheduling allocates the resources within the same class with the exhaustive service strategy. Finally, the simulation results validate the propose algorithm, and show that higher system throughput as well as lower delay and delay jitter can be achieved compared to other existing approaches.
Index Terms—Mobile WiMAX, QoS, Throughput, Uplink Scheduling Algorithm.
D. M Ali is with the Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia, on leave from Faculty of Engineering, Mara University of Technology, UiTM Shah Alam, 40450 Shah Alam, Selangor, Malaysia.(e-mail: darma504@yahoo.com.my).
K. Dimyati was with the Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia. He is now with the Department Electrical and Electronic Engineering, Faculty of Engineering, National Defense University of Malaysia, Kem Sungai Besi,57000 Kuala Lumpur, Malaysia (e-mail: kaharudin@upnm.edu.my).
Cite: D. M. Ali and K. Dimyati, "Threshold based Cyclic Polling (TbCP): An Uplink Scheduling Algorithm for Mobile WiMAX Systems," International Journal of Information and Electronics Engineering vol. 1, no. 1, pp. 1-8, 2011.