Voice over IP (VoIP) and Web proxy over xDSL (II)
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
DOI
902218E002041
Abstract
As a sub-project of the joint project
entitled “xDSL Multimedia Multi-service
Communications System,” this project,
named “Voice over IP (VoIP) and Web
Proxy over xDSL,” attempts to design both
VoIP and Web proxy services over xDSL
developed by the other sub-projects in a
five-year span. In the first year, we have
investigated and improved the effect of
xDSL systems on WWW traffics.
In the second year, we have focused on
improving the performance of network
conferences. Traditionally, a multipoint
conference takes place through an MCU
(Multipoint Control Unit), which centralizes
the control of the conference. This approach
requires each conference member have a
direct connection to the MCU, thus forming a
star topology for the conference. Our
proposed approach establishes a shared, cost
effective conference tree for the conference
taking advantage of existing VoIP protocols.
We have also developed a simplified
analytical model and conducted simulations
to compare the performance of the proposed
approach. The results show that our approach
enjoys the advantage of lower join latency,
better bandwidth efficiency, and more cost
effective as compared to other approaches.
The preliminary results of this project
have been published on the proc. IEEE
ICME 2001.
Subjects
ADSL
Internet Telephony
VoIP Application Layer Conference Tree
Megaco/H.248
Publisher
臺北市：國立臺灣大學電機工程學系暨研究所
Type
report
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