ABSTRACT
Skype is currently the most popular Voice over Internet Protocol (VoIP) software used by Internet users. Focusing on the quality of voice of this popular VoIP application, we survey the existing performance measurement studies on Skype. Skype has been developing attractive features for its IP telephony services. We investigate the impact of network-base factors, such as packet loss, delay, etc., on the quality of voice with respect to different kinds of services: Skype client-to-client audio conversation, Skype client Public Switched Telephone Networks (PSTN) to telephone call, group conference, and Skype calls in a mobile environment.
