Title :
An Efficient and Robust Overlay Routing Scheme for VoIP
Author :
Hilt, Volker ; Hari, Adiseshu ; Hofmann, Markus
Author_Institution :
Lucent Technol. Bell Labs, Holmdel, NJ
Abstract :
Even though voice over Internet protocol (VoIP) provides good call quality in most cases, there are occasions in which the delay, jitter and loss rate in the Internet exceeds the values tolerable for voice traffic. This leads to a degradation in voice quality or may cause a VoIP call to fail entirely. Overlay networks provide a solution to increase the quality of service (QoS) in the Internet. However, application-agnostic overlay networks cannot fully exploit the characteristics of VoIP traffic. In this paper, we propose a new overlay routing scheme for VoIP. By utilizing the signaling phase that precedes a VoIP call and passively monitoring VoIP flows, our VoIP overlay routing scheme can effectively select a route that meets a given quality of service criteria. It is robust in that it quickly reroutes traffic around network failures and efficient by creating only a minimal overhead through the tight integration with VoIP protocols
Keywords :
Internet telephony; quality of service; routing protocols; telecommunication traffic; QoS; VoIP traffic; overlay routing scheme; quality-of-service; voice over Internet protocol; Degradation; Delay; IP networks; Internet telephony; Jitter; Quality of service; Robustness; Routing; Telecommunication traffic; Web and internet services; Overlay Networks; QoS; Routing; VoIP;
Conference_Titel :
Information, Communications and Signal Processing, 2005 Fifth International Conference on
Conference_Location :
Bangkok
Print_ISBN :
0-7803-9283-3
DOI :
10.1109/ICICS.2005.1689098