Abstract
Worldwide Interoperability for Microwave Access (WiMAX) is regarded as a promising technology that can provide wireless communication because of its advantages which include, high-speed data rates, high coverage and low cost of development and maintenance. WiMAX also supports the performance of Voice over Internet Protocol (VoIP), which is expected to replace conventional circuit switched voice services. VoIP requires to accurately design of QoS configurations over WiMAX networks. This paper focuses on studying and analyzing the performance of VoIP over WiMAX mobile networks. WiMAX network and VoIP technology such as mobility, WiMAX service classes, number of nodes and VoIP codecs are studied and analyzed. WiMAX network is simulated in a different manner using the simulation program known as OPNET Modeler. Simulation results established that the service layer Unsolicited Grand Service (UGS) is more appropriate for VoIP service because it has the best standard and performance. It was also observed that the least delay and highest value of customer satisfaction rate of services is demonstrated by the G.723.1 best coding. It also maintains the minimum consumption of capacity.
Highlights
Great investments have been made by the telecommunications into developing and deploying mobile Worldwide Interoperability for Microwave Access (WiMAX) networks due to the high demand of broadband wireless access by mobile users [1]
Voice over Internet Protocol (VoIP) has been identified as one of the appropriate applications that can facilitate the deployment of mobile WiMAX networks [2]
A major application that can be used in mobile WiMAX networks is VoIP, which is currently the technology used for voice call through packet switch networks [3]
Summary
Great investments have been made by the telecommunications into developing and deploying mobile Worldwide Interoperability for Microwave Access (WiMAX) networks due to the high demand of broadband wireless access by mobile users [1]. The aim of this investment is to meet the needs of mobile users. Alongside the emergence of mobile WiMAX networks deployment, has made VoIP over WiMAX an attractive market [4] More so, this increase of VoIP applications has been a motivation for both equipment suppliers and carriers to initiate the trend in telecommunication innovation [5,6,7]. This research is carried out in order to analyze the performance of VoIP over mobile WiMAX networks
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