寬頻網際網路服務品質保證(II)─子計畫三:支援寬頻網際網路「負載控制服務」以量測為基礎的允諾控制與擁塞避免機制(I)
Other Title
Measurement-based Admission Control and Congestion Avoidance Schemes for
Controlled-Load Service in Broadband Internet
Controlled-Load Service in Broadband Internet
Date Issued
2000
Date
2000
Author(s)
DOI
892219E002002
Abstract
High quality, absolute guaranteed
service may not be required by all
applications. Many real-time applications,
such as nv, ivs and vic, recently developed
for packet-switched networks are capable of
adapting their transmission to actual packet
delays. They can as well tolerate occasional
delay bound violations in the presence of
transient network congestion. For this type
of applications, an absolutely reliable bound
on packet delivery times is not required.
Moreover, many non-real-time applications
such as on-line transaction processing and
distributed simulation would desire a
congestion-free packet delivery service from
the network. This new type of service is
called “Congestion-Free Service” with the
guarantee of a maximum packet loss rate.
This work considers resource
allocation in the support of “Congestion-Free
Service” in Broadband Internet. First,
we studied traffic characterization under
different measurement models via analyzing
traffic traces collected from National
Taiwan University campus network. The
results show that traffic load can be
approximated by the Normal distribution. In
the second part of the work, we proposed a
dynamic bandwidth and queue management
scheme to support “Congestion-Free Service.” Simulation results show that in
order to maintain a maximum packet loss
rate, it is important that the system avoids
operating at heavy loads, i.e. high link
utilization. In a link sharing system,
dynamic bandwidth allocation based on
input loads can effectively avoid congestion.
Furthermore, when combined with active
queue management, it can further
accommodate transient traffic bursts for
non-self-similar traffic.
Subjects
congestion-free
packet loss rate
traffic measurement
measurement window
bandwidth allocation
buffer management
Publisher
臺北市：國立臺灣大學資訊管理學系暨研究所
Type
other
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