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LCN
2007
IEEE
15 years 3 months ago
Voice quality measurement in a typical router-based network
In this paper, we introduce novel mechanisms for measuring and evaluating the performance of a network and its devices, configured especially for Voice over IP (VoIP). We study the...
A. Azarfar, A. H. Jahangir
COCO
1994
Springer
140views Algorithms» more  COCO 1994»
15 years 1 months ago
Random Debaters and the Hardness of Approximating Stochastic Functions
A probabilistically checkable debate system (PCDS) for a language L consists of a probabilisticpolynomial-time veri er V and a debate between Player 1, who claims that the input x ...
Anne Condon, Joan Feigenbaum, Carsten Lund, Peter ...
TELSYS
2010
154views more  TELSYS 2010»
14 years 4 months ago
Blocking attacks on SIP VoIP proxies caused by external processing
As Voice over IP (VoIP) applications become increasingly popular, they are more and more facing security challenges that have not been present in the traditional Public Switched Te...
Ge Zhang, Simone Fischer-Hübner, Sven Ehlert
ICC
2007
IEEE
119views Communications» more  ICC 2007»
15 years 3 months ago
Study of Best-Effort VoIP Handovers between WLAN and EVDO Networks
The IEEE 802.11 based Wireless LANs (WLANs) have emerged as a viable technology for supporting real-time applications such as Voice over IP (VoIP). Even the Personal Digital Assist...
Amit P. Jardosh, Rajeev Koodli, Tat Chan
ISSA
2008
14 years 11 months ago
Spam Over Internet Telephony and How to Deal with it
In our modern society telephony has developed to an omnipresent service. People are available at anytime and anywhere. Furthermore the Internet has emerged to an important communi...
Rachid El Khayari, Nicolai Kuntze, Andreas U. Schm...