Dynamic Bandwidth Allocation for Internet Telephony

Yiu Wing Leung*

*Corresponding author for this work

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review


Internet telephony is promising for long-distance calls because of its low service charge and value-added functions. To provide Internet telephony to the general public, a service provider can operate a telephone gateway in each servicing city to bridge the local telephone network and the Internet, so that users can use telephones or fax machines to access this gateway for services. In this paper, we propose a dynamic bandwidth allocation scheme for two purposes: (1) each telephone gateway can fully utilize the available bandwidth to serve more telephone and fax sessions and (2) it can respond to the changing environments. We exploit three properties for dynamic bandwidth allocation. First, in a telephone session, each user usually alternates between speaking and listening. When a user is not speaking, she does not send any voice stream and hence the bandwidth can be dynamically released from this session for the other sessions. Second, voice traffic is elastic because it can be further compressed at the cost of a lower quality. Third, fax traffic is flexible because it can be temporarily delayed. We exploit these three properties to allocate bandwidth to telephone and fax sessions dynamically. When a telephone gateway adopts dynamic bandwidth allocation, it can serve more telephone and fax sessions while providing acceptably good quality-of-service (QoS), and it can give more stable QoS when the available bandwidth varies.

Original languageEnglish
Title of host publicationAdvances in Multimedia Information Processing - PCM 2004
Subtitle of host publication5th Pacific Rim Conference on Multimedia, Tokyo, Japan, November 30 - December 3, 2004, Proceedings, Part II
EditorsKiyoharu Aizawa, Yuichi Nakamura, Shin’ichi Satoh
Place of PublicationBerlin, Heidelberg
Number of pages8
ISBN (Electronic)9783540305422
ISBN (Print)9783540239772
Publication statusPublished - 29 Oct 2004
Event5th Pacific Rim Conference on Multimedia - Advances in Multimedia Information Processing - PCM 2004 - Tokyo, Japan
Duration: 30 Nov 20043 Dec 2004

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349
NamePCM: Pacific Rim Conference on Multimedia


Conference5th Pacific Rim Conference on Multimedia - Advances in Multimedia Information Processing - PCM 2004
Internet address

Scopus Subject Areas

  • Theoretical Computer Science
  • Computer Science(all)

User-Defined Keywords

  • Dynamic bandwidth allocation
  • Internet telephony


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