Rajina M A Raj Mohamed, Osman Mohd Said, Khong Neng Choong, Cheng Suan Lee and Nurhaizi Hamzah
In this paper, we describe a SIP-based traffic congestion scenario in a WiFi network and explain how codec switching helps users to stay connected on their calls with less VoIP performance degradation.
The rapid growth of internet technology and its infrastructure leads to high demand of VoIP. With a multitude of wireless access technologies such as GPRS, WiFi, WiMAX and 3G, the internet-based services such as VoIP can be experienced while being mobile. However, despite the telcos and service providers continue to upgrade their network capacity and accessibility (i.e. by introducing WiFi access points in some urban areas), it is still insufficient to support the high demand of multimedia traffic due to traffic congestion. And, since VoIP packets are delay sensitive, traffic congestion could easily affect the performance of a VoIP session. To address such issue, VoIP application should be enhanced with the capability of switching codec where each codec operates at different bitrate as to stay functional at different traffic conditions. In this paper, we describe a SIP-based traffic congestion scenario in a WiFi network and explain how codec switching helps users to stay connected on their calls with less VoIP performance degradation
2009 International Conference on Software Technology and Engineering (ICSTE 2009), July 24 – 27, 2009, Chennai, India.