Measurement of characteristics of voice over IP in a wireless LAN environment

Author

Feigin, Jeffrey ; Pahlavan, Kaveh

Author_Institution

Center for Wireless Inf. Network Studies, Worcester Polytech. Inst., MA, USA

fYear

1999

fDate

1999

Firstpage

236

Lastpage

240

Abstract

Voice over IP is becoming very popular in computer communication applications, where quality of service can be evaluated solely by an accurate characterization of packet loss and delay. However, hardware measurement equipment for wireless networks such as 802.11 are essentially unavailable and many software techniques are either inaccurate or imprecise. This paper presents a novel measurement and clock synchronization technique that requires only commercially available software tools to measure the end-to-end propagation delay, delay jitter, and the exact times that packets were lost in the network. This system is capable of measuring the delay of the arriving packets to within 50 microseconds of accuracy. The measurement system is used in a wireless LAN testbed to evaluate the characteristics of voice over IP in an IEEE 802.11 environment

Keywords

data acquisition; delays; jitter; measurement systems; packet radio networks; quality of service; synchronisation; transport protocols; voice communication; wireless LAN; 802.11 wireless networks; characteristics measurement; clock synchronization; computer communication applications; data acquisition system; delay; delay jitter; delay measurement; end-to-end propagation delay; hardware measurement equipment; measurement system; packet loss; quality of service; software techniques; software tools; voice over IP; wireless LAN environment; wireless LAN testbed; Application software; Computer applications; Hardware; Internet telephony; Loss measurement; Propagation delay; Quality of service; Software measurement; Wireless LAN; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Mobile Multimedia Communications, 1999. (MoMuC '99) 1999 IEEE International Workshop on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-5904-6

Type

conf

DOI

10.1109/MOMUC.1999.819496

Filename

819496