Abstract:
As a rapidly growing technology, voice over Internet Protocol (VoIP)
enables the transmission of voice data over Internet Protocol (IP)-based
networks. VoIP has become an alternative solution for the public
switched telephone network given its capability to transmit voice data in
the form of digital IP packets over TCP/IP -based Internet, particularly
with the significant deployment that occurred in the standard of
Worldwide Interoperability for Microwave Access (WiMAX, IEEE
802.16) networks. This research investigates the performance of VoIP
traffic over WiMAX networks by using various voice service classes and
by considering several realistic networking scenarios. The Optimized
Network Engineering Tool (modular 14.5) was used to measure and
analyze a set of quality of service parameters, including packet send,
packet received, and throughput. The results of network research
simulation exercise proved that when the number of nodes are raised
between 21 to 84 nodes, UGS has enhanced in range 11% to 14% for the
packet received and 17% to 23% for the throughput opposed to ertPS. It
is concluded that, in different network sizes, Light, Medium, and High,
the service class UGS provide better VoIP quality.
