The world currently has a strong trend towards homogeneous wireless networks, thanks to
the mobility service that they offer, unlike wired networks. However, in homogeneous …

Abstract Call Admission Control is a central mechanism for assurance of quality of service in
telephony. While CAC is integrated into Public Switched Telephony Network (PSTN), its …

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 …

Perceptual VoIP quality is an issue for VoIP applications/services because VoIP applications
require real-time support. Not only network factors (eg packet loss, packet delay and jitter) …

Wireless networking technologies, do not cease to develop and impose day after day. Unlike
wired networks, these technologies offer much more mobility, a wide coverage and speed …

This paper presents a mathematical model that has been created from the subjective MOS,
instead of modifying or improving the existing objective measurement methods (eg, E …

This paper briefly presents the study of VoIP quality from two popular social network
applications over 3G and 4G in Bangkok, covering both stationary and mobility. It has been …

One problem that often occurs after installing/implementing an IP telephony system is voice
quality. Although there are objective measurement tools for voice quality evaluation, the …

Abstract IP Multimedia Subsystem “IMS” is the modular architecture that provides users with
reliable access to multimedia services (voice, video conferencing, interactive services, etc.) …

VoIP is very useful but it there are quality issues when delays or losses occur in the network.
Thus, VoIP quality assessment for voice quality assurance or improvement is important …