Traffic Behaviour of VoIP in a Simulated Access Network
Insufficient Quality of Service (QoS) of Voice over
Internet Protocol (VoIP) is a growing concern that has lead the need
for research and study. In this paper we investigate the performance
of VoIP and the impact of resource limitations on the performance of
Access Networks. The impact of VoIP performance in Access
Networks is particularly important in regions where Internet
resources are limited and the cost of improving these resources is
prohibitive. It is clear that perceived VoIP performance, as measured
by mean opinion score [2] in experiments, where subjects are asked
to rate communication quality, is determined by end-to-end delay on
the communication path, delay variation, packet loss, echo, the
coding algorithm in use and noise. These performance indicators can
be measured and the affect in the Access Network can be estimated.
This paper investigates the congestion in the Access Network to the
overall performance of VoIP services with the presence of other
substantial uses of internet and ways in which Access Networks can
be designed to improve VoIP performance. Methods for analyzing
the impact of the Access Network on VoIP performance will be
surveyed and reviewed. This paper also considers some approaches
for improving performance of VoIP by carrying out experiments
using Network Simulator version 2 (NS2) software with a view to
gaining a better understanding of the design of Access Networks.
[1] General Information on the Internet System Survey, ITU-T Publication,
Jan 2000.
[2] Goode, B Sep 2002, 'Voice Over Internet Protocol', paper presented to
Proceeding of The IEEE, IEEE, Sep 2002.
[3] Cisco System 2001, Quality of Service for Voice Over IP, pp 3-18,
<http://www.cisco.com/univercd/cc/td/doc/cisintwk/qosVoIP.pdf>.
[4] Moreno, C, Antolin, A, & Diaz, F Jun 2001, Recognizing Voice Over
IP: A Robust Front-End for Speech Recognition on the World Wide
Web, IEEE Transactions On Multimedia.
[5] ITU-T Proceeding, 2003, ITU-T Publication, <http://www.itu.int/ITUT/>.
[6] One way Transmission time, 1996, ITU-T Recommendation G114,
<http://www.itu.int/ITU-T/>.
[7] Stability and Echo CCITT Recommendation G.131 1988, ITU-T,
<http://www.itu.int/ITU-T/>.
[1] General Information on the Internet System Survey, ITU-T Publication,
Jan 2000.
[2] Goode, B Sep 2002, 'Voice Over Internet Protocol', paper presented to
Proceeding of The IEEE, IEEE, Sep 2002.
[3] Cisco System 2001, Quality of Service for Voice Over IP, pp 3-18,
<http://www.cisco.com/univercd/cc/td/doc/cisintwk/qosVoIP.pdf>.
[4] Moreno, C, Antolin, A, & Diaz, F Jun 2001, Recognizing Voice Over
IP: A Robust Front-End for Speech Recognition on the World Wide
Web, IEEE Transactions On Multimedia.
[5] ITU-T Proceeding, 2003, ITU-T Publication, <http://www.itu.int/ITUT/>.
[6] One way Transmission time, 1996, ITU-T Recommendation G114,
<http://www.itu.int/ITU-T/>.
[7] Stability and Echo CCITT Recommendation G.131 1988, ITU-T,
<http://www.itu.int/ITU-T/>.
@article{"International Journal of Information, Control and Computer Sciences:52933", author = "Jishu Das Gupta and Srecko Howard and Angela Howard", title = "Traffic Behaviour of VoIP in a Simulated Access Network", abstract = "Insufficient Quality of Service (QoS) of Voice over
Internet Protocol (VoIP) is a growing concern that has lead the need
for research and study. In this paper we investigate the performance
of VoIP and the impact of resource limitations on the performance of
Access Networks. The impact of VoIP performance in Access
Networks is particularly important in regions where Internet
resources are limited and the cost of improving these resources is
prohibitive. It is clear that perceived VoIP performance, as measured
by mean opinion score [2] in experiments, where subjects are asked
to rate communication quality, is determined by end-to-end delay on
the communication path, delay variation, packet loss, echo, the
coding algorithm in use and noise. These performance indicators can
be measured and the affect in the Access Network can be estimated.
This paper investigates the congestion in the Access Network to the
overall performance of VoIP services with the presence of other
substantial uses of internet and ways in which Access Networks can
be designed to improve VoIP performance. Methods for analyzing
the impact of the Access Network on VoIP performance will be
surveyed and reviewed. This paper also considers some approaches
for improving performance of VoIP by carrying out experiments
using Network Simulator version 2 (NS2) software with a view to
gaining a better understanding of the design of Access Networks.", keywords = "Codec, DiffServ, Droptail, RED, VOIP", volume = "2", number = "12", pages = "4055-6", }