Interest in broadband wireless access (BWA) has been rising due to augmented user mobility and the requirement for data access at all times. The best available quality of experience is promised by IEEE 802.16 based WiMAX networks. For guaranteed services for voice, video and data, WiMAX networks include numerous quality of service (QoS) mechanisms at the Media Access Control (MAC) level. In order to provide different characteristics to Quality of Service (QoS) an effective scheduling is critical for the WiMAX system. Scheduling is an important part of WiMAX layers, which can be accomplished via downlink or via uplink scheduling. This paper gives a comparative analysis of two different schedulers Priority Queue (PQ) and Weighted Fair Queue (WFQ). The study has been carried out on a number of issues like: packet end to end delay and traffic received, and the simulation results shows that Weighted Fair Queue technique has a better quality than the other technique. OPNET Simulator has been used to create the Simulation scenario for WiMAX scheduling and result for different algorithm has been presented.

1. Ahmadi, S. 2009 An overview of next-generation mobile WiMAX technology. Intel Corp., Santa Clara, CA, Vol. 47, Issue 6, pp. 84-88.
2. Bo Li Yang Qin, Chor Ping Low and Choon Lim Gwee 2007. A Survey on Mobile WiMAX [Wireless Broadband Access]. Hon Kong Univ. of Sci. & Technol., Kowloon, Vol.45, Issue 12, pp. 70-75.
3. Chakchai So-In,Raj Jain and Abdel-Karim Tamini, "Scheduling in IEEE 802.16e Mobile WiMAX Networks: Key Issues and Survey", IEEE Journal on Selected Areas In Communication , Vol. 27, No. 2, February 2009.
4. Eun-Chan Park, "Efficient Uplink Bandwidth Request with Delay Regulations for Real-Time Service in Mobile WiMAX Networks", IEEE Transactions on Mobile Computing Vol. 8, No. 9, September 2009.
5. Hongfei Du, Jiangchuan Liu and Jie Liang, "Downlink Scheduling for Multicast/Broadcast over Mobile WiMAX: Connection-Oriented Multistate Adaptation", Simon Fraser University, IEEE Wireless Communications, August 2009.
6. Houjun Wang, Naixue Xiong and Wei Nie1, 2000. A Novel Hybrid uplink Bandwidth Scheduler in WiMAX Real Time Communication Networks. In Proceedings of the 5th International Conference on Ubiquitous Information Technologies and Applications (CUTE), pp. 1-6.
7. RTS case study. Get rid of traffic jam with priority queuing. http://www.rtsindia.com/pdf/PQ_CaseStudy%20ver2.pdf.
8. Weighted Fair Queuin. http://en.wikipedia.org/wiki/Weighted_fair_queuing.
9. Mohammad Mirza Golam Rashed and Mamun Kabir, "A Comparative study of different queuing techniques in VoIP, Video Conferencing and File Transfer", Department of ETE, Daffodil International University Journal of Science and Technology, Vol. 5, Issue 1, January 2010.
10. Raj Jain, Chakchai So-In and Abdel-Karim Tamimi, "Scheduling in IEEE 802.16e Mobile WiMAX Networks: Key Issues and a Survey", IEEE Journal on Selected Areas in Communication, Vol. 27, Issue 2, pp. 156-171, February 2009.
11. Harwinder Singh and Maninder Singh Kamboj, "Performance Analysis of QoS in PMP Mode WiMAX Networks", International Journal of Computer Applications, Vol. 3, No. 12, July 2010.

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