ABSTRACT:
Worldwide Interoperability for Microwave Access (WiMAX) is based on the IEEE 802.16 Standard with mobility support from the 802.16e amendment and it enables convergence of mobile and fixed broadband wireless networks covering metropolitan and rural areas. (WiMAX) networks were expected to be the main Broadband Wireless Access (BWA) technology that provides several services such as data, voice, and video services (real and non-real services) including different Quality of Service (QoS) classes, which in turn were defined by IEEE 802.16 standard. The IEEE 802.16 standard doesn’t specify scheduling mechanisms and so far many solutions have been proposed in the science world. Scheduling in WiMAX became one of the most challenging issues, since it was responsible for distributing available resources of the network among all users; this led to the demand of constructing and designing high efficient scheduling algorithms in order to improve the network utilization, increase the network throughput, and minimize the end-to-end delay. In this research, we presented a simulation study to measure the performance of two scheduling algorithms in WiMAX, which are Packet Scheduling Scheme for multiple Services in Mobile WiMAX System proposed by Lee and Park in 2010 and Channel-Aware Scheduling Algorithm for Mobile WiMAX network proposed by El-Shennawy et.al in 2014. Simulation results are obtained using Simulink and performance of these two scheduling schemes in terms of throughput, delay, jitter and packet losses were evaluated. Lee and Park’s algorithm has exhibited a good performance in terms of throughput and average packet loss. The throuput was higher and the average packet loss was lower. El-Shennawy et.al algorithm exhibits a lower average delay and lower average jilter. In terms of video or voice communication, El-Shennawy et.al algorithm will do better while in terms of data communication Lee and park algorithm will be appropriate.
Keywords:
WiMAX, QoS, Mobile, Scheduling, Broadband
