Analysis of VoIP traffic in WiMAX using NS2 simulator
Smita Jangale2012, International Journal of Advanced Research in Computer Science and Electronics Engineering
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Abstract
Worldwide Interoperability for Microwave Access (WiMAX) is a wireless broadband technology, which supports point to multi-point (PMP) broadband wireless access. It is a fixed and mobile wireless access technology based on the IEEE 802.16 standards. Voice over Internet Protocol (VoIP), called Internet Protocol (IP) Telephony, Internet telephony or Digital Phone. It utilizes the IP network (Internet or intranets) for telephone conversations. In this paper we have analyzed the performance of different VoIP codecs over the best effort service flow for WiMAX network. The parameters considered for the evaluation of network are throughput, average delay & jitter. The simulation is done using network simulator 2 (NS2) by varying number of nodes and results are presented in graphical form.
Key takeaways
- VoIP over WiMAX has been emerging as an infrastructure to provide broadband wireless voice service with cost efficiency reliability and guaranteed quality of service.
- The UGS class is designed to support real-time uplink service flows that transport fixed-size data packets on a periodic basis, such as T1/E1 and VoIP without silence suppression.
- Number of mobile nodes in the simulation and type of VOIP codec were passed in as input parameters while running the simulation.
- Fig.3 shows variations of average jitter for each type of VoIP codec with increasing number of mobile nodes.
- We have assessed best efforts WiMAX service flow for different VOIP codecs by considering various performance parameters like throughput, average delay, and jitter.
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