Title :
Priority Based Dynamic Rate Control for VoIP Traffic
Author :
Sabrina, Fariza ; Valin, Jean-Marc
Author_Institution :
CSIRO ICT Centre, Sydney, NSW, Australia
Abstract :
This paper presents a novel mechanism for dynamic rate control of prioritised Voice Over IP (VoIP) traffic in real time. The system uses our proposed variable bit rate speech codec called Speex, which can dynamically adjust the encoding bit rate (and hence the voice quality) based on the feedback information about the network congestion, flow priority, and the instantaneous speech properties. Our extensive NS2 simulation results along with results from ITU-T standard of speech quality evaluation tool (PESQ) show that the proposed system indeed provides highest quality speech while maximising the bandwidth utilisation and reducing the network congestion.
Keywords :
IP networks; Internet telephony; speech coding; telecommunication congestion control; ITU-T standard; NS2 simulation; Speex; VoIP traffic; Voice Over IP; bandwidth utilisation; encoding bit rate; feedback information; flow priority; network congestion; priority based dynamic rate control; speech quality evaluation tool; variable bit rate speech codec; Aggregates; Bandwidth; Bit rate; Control systems; Feedback; Internet telephony; Protocols; Resource management; Speech analysis; Speech codecs;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425342
