Performance Progress in QoS Mechanism in Voice over Internet Protocol System

Abstract

Voice over Internet Protocol (VoIP) is one of the most advancing technologies used to make calls through the internet. In Voice over Internet Protocol (VoIP) system, the speech signal is degraded when passed through the network layers. The speech signal is processed through the best effort policy based Internet Protocol (IP) network, which leads to the network degradations including delay, packet loss and jitter. The researchers have made enormous efforts to resolve the QoS issues to make VoIP best alternative to the traditional public switched telephone network. The work in this paper summarized the performance progress in quality of service (QoS) mechanism for enabling the VoIP system to provide the toll quality service to the users.

Keywords: VoIP, QoS, Signal Processing