Dummynet: a simple approach to the evaluation of network protocols
ACM SIGCOMM Computer Communication Review
An E-Model Implementation for Speech Quality Evaluation in VoIP Systems
ISCC '05 Proceedings of the 10th IEEE Symposium on Computers and Communications
Quantifying Skype user satisfaction
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Quantification of quality of experience for edge-based applications
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
Measuring Mobile Peer-to-Peer Usage: Case Finland 2007
PAM '09 Proceedings of the 10th International Conference on Passive and Active Network Measurement
Technology evolution of mobile peer-to-peer communications
Proceedings of the 4th Annual International Conference on Wireless Internet
Value analysis of technology evolution: case mobile peer-to-peer communications
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
P2P-based VoIP QoS management in heterogeneous networks
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Reward mechanisms for P2P VoIP networks
Information Technology and Management
QoE-driven dynamic management proposals for 3G VoIP services
Computer Communications
Statistical analysis and modeling of Skype VoIP flows
Computer Communications
Skype Video congestion control: An experimental investigation
Computer Networks: The International Journal of Computer and Telecommunications Networking
On traffic characteristics and user experience of Skype video call
Proceedings of the Nineteenth International Workshop on Quality of Service
Quality of experience adaptation controllers for voice and video in wireless networks
WWIC'11 Proceedings of the 9th IFIP TC 6 international conference on Wired/wireless internet communications
QoE-based packet dropper controllers for multimedia streaming in WiMAX networks
Proceedings of the 6th Latin America Networking Conference
Can Skype be used beyond video calling?
Proceedings of the 9th International Conference on Advances in Mobile Computing and Multimedia
IPTV quality assessment system
Proceedings of the 7th Latin American Networking Conference
Quality of experience management for video streams: the case of Skype
Proceedings of the 10th International Conference on Advances in Mobile Computing & Multimedia
Proceedings of the 4th ACM Multimedia Systems Conference
Improving QoE of SIP-based automated voice interaction in mobile networks
Proceedings of the 8th International Conference on Network and Service Management
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In the future Internet, multi-network services will follow a new paradigm in which the intelligence of the network control is gradually moved to the edge of the network. This impacts both the objective Quality of Service (QoS) of the end-to-end connection as well as the subjective Quality of Experience (QoE) as perceived by the end user. Skype already offers such a multi-network Voice-over-IP (VoIP) telephony service today. Due to its ease of use and a high sound quality, it becomes increasingly popular in the wired Internet. UMTS operators promise to offer large data rates which should suffice to support VoIP calls in a mobile environment. However, the success of those applications strongly depends on the corresponding QoE. In this work, we analyze the theoretically achievable as well as the actually achieved quality of IP-based voice calls using Skype. This is done performing measurements in both a real UMTS network and a testbed environment. The latter is used to emulate rate control mechanisms and changing system conditions of UMTS networks. The results show in how far Skype over UMTS is able to keep pace with existing mobile telephony systems and how it reacts to different network characteristics. The investigated performance measures comprise the QoE in terms of the MOS value and the QoS in terms of network-based factors like throughput, packet interarrival times, or packet loss.