Title :
Jitter-Buffer Management for VoIP over Wireless LAN in a Limited Resource Device
Author :
Baratvand, Mohsen ; Tabandeh, Mahmoud ; Behboodi, Arash ; Ahmadi, Ali Fotowat
Author_Institution :
Sharif Univ. of Technol., Tehran
Abstract :
VoIP over WLAN is a promising technology as a powerful replacement for current local wireless telephony systems. Packet timing Jitter is a constant issue in QoS of IEEE802.11 networks and exploiting an optimum jitter handling algorithm is an essential part of any VoIP over WLAN (VoWiFi) devices especially for the low cost devices with limited resources. In this paper two common algorithms using buffer as a method for Jitter handling are analyzed with relation to different traffic patterns. The effect of different buffer sizes on the quality of voice will be assessed for these patterns. Various traffic patterns were generated using OPNET and Quality of output voice was evaluated based on ITU PESQ method. It was shown that an optimum voice quality can be attained using a circular buffer with a size of around twice that of a voice packet.
Keywords :
Internet telephony; buffer storage; computer network management; quality of service; telecommunication traffic; timing jitter; wireless LAN; IEEE802.11 networks; ITU PESQ method; OPNET software; QoS; VoIP over wireless LAN; jitter-buffer management; packet timing jitter; traffic patterns; voice quality; Cost function; Delay; Internet telephony; Jitter; Power system management; Quality of service; Resource management; Speech analysis; Telephone sets; Wireless LAN; Circular Buffer; Jitter Management; Multi Buffer; OPNET simulation; PESQ method; Quality of Service; Voice Quality; Voice over IP; Wireless LAN;
Conference_Titel :
Networking and Services, 2008. ICNS 2008. Fourth International Conference on
Conference_Location :
Gosier
Print_ISBN :
978-0-7695-3094-9
DOI :
10.1109/ICNS.2008.17
