Dynamic Time Sharing: A New Approach For Congestion Management

Document type: Bookchapters
Full text:
Author(s): Adrian Popescu, Parag Pruthi
Title: Dynamic Time Sharing: A New Approach For Congestion Management
Book: ATM Networks: Performance Modelling and Analysis
Year: 1997
Volume: 3
Editor: Demetres Kouvatsos
ISBN: 0-412-80970-2
Publisher: Chapman & Hall
City: London
Organization: Blekinge Institute of Technology
Department: Dept. of Telecommunications and Mathematics (Institutionen för telekommunikation och matematik)
Dept. of Telecommunications and Mathematics S-371 79 Karlskrona
+46 455 780 00
Authors e-mail: adrian.popescu@itm.hk-r.se
Language: English
Abstract: A new approach for bandwidth allocation and congestion control is reported in
this paper, which is of the Rate Controlled admission with Priority Scheduling
service type. It is called Dynamic Time Sharing (DTS), because of the
dynamic nature of the procedure for resource partitioning to allocate and
guarantee a requested bandwidth for every traffic class. This approach is based
on guaranteeing specific traffic parameters (bandwidth requirements) through
a policing unit, and then optimizing the bandwidth assignment within the
network for specific parameters of interest (like delay or jitter, and loss). The
optimization process is based on the parameters guaranteed by the policing
unit. The policing unit also functions to enforce the "fair" sharing of resources.
A batch admission policy is used at the edges of the network according to a
specific framing strategy to follow the traffic characteristics (e.g., the traffic
constraint function) of different traffic classes. On the other hand, the DTS
mechanism allows for another framing (congestion control) strategy to be used
within the network, which is based on different (delay/loss) requirements of
the traffic classes. Proper management of bandwidth and buffer resources is
provided in every (switch) node of the network, such as to guarantee the
diverse performance of interest.
Subject: Telecommunications\Traffic Control in ATM Networks
Keywords: Congestion control, VBR, deterministic guarantees, rate-based admission con- trol, modeling, analysis
Note: This article is written under the Project "Traffic Control in ATM Networks: Engineering Impacts for Realistic Traffic Processes"