Browsing by Author "Al-Fayyadh,H."
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Conference Object Citation Count: 2Comparison of QoS architectures for VoIP traffics in IPv4 and IPv6(Institute of Electrical and Electronics Engineers Inc., 2017) Koyuncu, Murat; Koyuncu,M.; Information Systems EngineeringThe Internet has become an integral part of human's life with an ever increasing number of applications and services that it provides to its customers. Both the numbers of Internet users and services provided by the Internet continue to rise tremendously. Quality of Service (QoS) is the ability of a network to provide better services for the users to divide the bandwidth according to the needs of different applications. With an increase in demand for multimedia applications like video streaming, VoIP and video conferencing, larger bandwidth requirement increases drastically since such applications are very sensitive to delay, packet loss, and jitter. IPv6 has new features which are designed to improve QoS supported by IPv4, as well as other improvements. This paper gives a comparative analysis of QoS architectures, namely Integrated Services (IntServ) and Differentiated Services (DiffServ), which are examined to see their effects for Voice over IP (VoIP) in IPv4 and IPv6 environments. For comparisons, OPNET Modeler is used for network modeling and testing. The obtained test results show the importance of IPv6 to support multimedia applications on the Internet. © 2016 IEEE.Conference Object Citation Count: 1Comparison of scheduling algorithms for multimedia applications in IPv4 and IPv6(Institute of Electrical and Electronics Engineers Inc., 2015) Koyuncu, Murat; Al-Fayyadh,H.; Information Systems EngineeringProviding guaranteed services in the Internet has become extremely essential to fulfill the requirements of the Internet users. With an increase in the number of users and demand for multimedia applications like video streaming, VoIP and video conferencing, larger bandwidth requirement increases drastically since such applications are very sensitive to delay, packet loss, and jitter. In such an environment, Quality of Service (QoS) is an important network performance parameter having a significant impact on multimedia applications. Besides other improvements, IPv6 was designed to improve QoS supported by IPv4. This paper gives a comparative analysis of three well-known queuing algorithms (First-in, First-Out-FIFO, Priority Queuing-PQ and Weighted-Fair Queuing-WFQ) which are examined to see their effects for multimedia applications in the IPv4 and IPv6 networks. OPNET is used for modeling, simulation and analyzing. Although IPv6 with PQ provides best performance for multimedia applications, IPv6 with WFQ is more appropriate when low priority traffic is also available. © 2015 IEEE.