Performance Analysis of Scheduling Algorithms For VoIP Services in IEEE 02.16 Systems
VoIP applications are being widely used in today\'s networks challenging their capabilities to provide a good quality of experience level to the users. In particular, There are several scheduling algorithms for Voice over IP (VoIP) services in IEEE 802.16 systems, such as unsolicited grant service (UGS), real-time polling service (rtPS), using Grant-Me bit of the generic MAC header. However, these algorithms have some problems of a waste of uplink resources, additional access delay, and MAC overhead for supporting VoIP services with variable data rates and silence suppression. To solve these problems, we propose a novel uplink-scheduling algorithm (Extended-rtPS) for the VoIP services in IEEE 802.16 systems through the performance analysis and simulation results of resource utilization, total throughput, and packet transmission delay, we show that our proposed algorithm can solve the problems of the conventional algorithms, and has the best performance among these algorithms.
Keywords: Worldwide interoperable Microwave Access (WiMAX); Voice over Internet Protocol (VOIP); Optimized Network Engineering Tools (OPNET) and Quality of Service (QoS)
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ABOUT THE AUTHORS
M.A. Mohamed
Associate Professor at the Faculty of Engineering-Mansoura University-Mansoura-Egypt
F.W. Zaki
Professor at the Faculty of Engineering-Mansoura University-Mansoura-Egypt
A.M. Elfeki
Researcher at the Faculty of Engineering-Mansoura University-Mansoura-Egypt
M.A. Mohamed
Associate Professor at the Faculty of Engineering-Mansoura University-Mansoura-Egypt
F.W. Zaki
Professor at the Faculty of Engineering-Mansoura University-Mansoura-Egypt
A.M. Elfeki
Researcher at the Faculty of Engineering-Mansoura University-Mansoura-Egypt