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

fYear

2008

fDate

16-21 March 2008

Firstpage

90

Lastpage

95

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Networking and Services, 2008. ICNS 2008. Fourth International Conference on

Conference_Location

Gosier

Print_ISBN

978-0-7695-3094-9

Type

conf

DOI

10.1109/ICNS.2008.17

Filename

4476541