Communication quality of voice over TCP used for firewall traversal

Hae Yong Yang, Kyung Hoon Lee, Sung Jea Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

As voice over IP (VoIP) services are becoming more widespread, UDP-restricted stateless firewalls (URSFs) have emerged as one of the main hurdles for deploying the service. By overcoming this obstacle, the new VoIP service Skype has gained rapid popularity. To traverse URSFs, Skype uses an abnormal transport method, namely voice over TCP (VoTCP). This paper investigates the effects of VoTCP on communication quality, and examines its operational network conditions. The experimental results show that the adoption of TCP for voice traffic causes a remarkable deterioration in the quality of service; however, VoTCP is applicable in a relatively clean network, such as the Skype's VoTCP section between a client and the client's super node. More specifically, if the jitter buffer size is adequately tuned, VoTCP can operate at a random packet loss probability of less than 1.6%.

Original languageEnglish
Title of host publication2008 IEEE International Conference on Multimedia and Expo, ICME 2008 - Proceedings
Pages29-32
Number of pages4
DOIs
Publication statusPublished - 2008
Event2008 IEEE International Conference on Multimedia and Expo, ICME 2008 - Hannover, Germany
Duration: 2008 Jun 232008 Jun 26

Publication series

Name2008 IEEE International Conference on Multimedia and Expo, ICME 2008 - Proceedings

Other

Other2008 IEEE International Conference on Multimedia and Expo, ICME 2008
CountryGermany
CityHannover
Period08/6/2308/6/26

Keywords

  • Firewall traversal
  • Qos
  • Skype
  • Voice over IP
  • Voice over TCP

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

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