By Topic

Proportional differentiated services, part II: loss rate differentiation and packet dropping

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Dovrolis, C. ; Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA ; Ramanathann, P.

The proportional differentiation model was proposed in Dovrolis et al. (1999), as a target for controllable and predictable relative differentiated services. Only the delay differentiation aspect of the model was considered, and focused on packet scheduling mechanisms. In this paper, we extend the proportional differentiation model in the direction of loss rate differentiation. Several previous mechanisms for buffer management and packet dropping, such as complete buffer partitioning, partial buffer sharing, or multi-class RED, are not suitable for relative differentiated services. We propose and evaluate two dropping mechanisms that closely approximate the proportional loss rate differentiation model. The two droppers, PLR(∞) and PLR(M), differ in the time interval over which the loss rates are measured and proportionally adjusted. This difference results in several trade-offs, in terms of implementation complexity, accuracy, and ability to deal with nonstationary traffic loads. We also re-evaluate the delay differentiation that the waiting time priorities (WTP) scheduler, of Dovrolis et al., can achieve in the presence of finite buffers and packet losses; this study extends their results providing further insight into the behavior of WTP in heavy load conditions. Finally, we examine the coupled effect of delay and loss rate proportional differentiation on the throughput of bulk-transfer TCP connections

Published in:

Quality of Service, 2000. IWQOS. 2000 Eighth International Workshop on

Date of Conference: