ScienceDirect® Home Skip Main Navigation Links
You have guest access to ScienceDirect. Find out more.
 
Home
Browse
My Settings
Alerts
Help
 Quick Search
 Search tips (Opens new window)
    Clear all fields    
advertisementadvertisement
Computer Networks
Volume 51, Issue 3, 21 February 2007, Pages 569-587
 
Font Size: Decrease Font Size  Increase Font Size
 Abstract - selected
Article
Purchase PDF (359 K)

  E-mail Article   
  Add to my Quick Links   
Bookmark and share in 2collab (opens in new window)
Request permission to reuse this article
  Cited By in Scopus (0)
 
 
 
Related Articles in ScienceDirect
View More Related Articles
 
View Record in Scopus
 
doi:10.1016/j.comnet.2006.05.004    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2006 Elsevier B.V. All rights reserved.

Bandwidth usage distribution of multimedia servers using Patchingstar, open

Carlo K. da S. RodriguesCorresponding Author Contact Information, a, E-mail The Corresponding Author and Rosa M.M. Leãoa, E-mail The Corresponding Author

aFederal University of Rio de Janeiro, COPPE/PESC, CxP 68511, Rio de Janeiro RJ 21941-972, Brazil

Received 28 June 2005; 
revised 5 March 2006; 
accepted 12 May 2006. 
Responsible Editor: J. Misic. 
Available online 13 June 2006.

Purchase the full-text article



References and further reading may be available for this article. To view references and further reading you must purchase this article.

Abstract

Several multicast bandwidth sharing techniques have been proposed in the literature to provide more scalability to multimedia servers. These techniques are often analyzed in terms of the average bandwidth requirements they demand to satisfy client requests. However, average values do not always provide an accurate estimate of the required bandwidth. Therefore, they cannot be the only parameter used to guarantee a certain level of quality to the clients. In this work we propose a simple analytical model to accurately calculate the distribution of the number of concurrent streams or, equivalently, the bandwidth usage distribution considering the popular Patching technique. We show that the distribution may be modeled as a binomial random variable in the single object case, and as a sum of independent binomial random variables in the multiple object case. Through simulation we validate our results. Moreover, we also illustrate how these results may be practically used for instance (i) to allocate bandwidth to provide a given level of QoS, (ii) to estimate the impact on QoS when some system parameters dynamically change, and (iii) to configure the overall system.

Keywords: Patching; Multicast; Multimedia; Bandwidth; QoS

Article Outline

1. Introduction
2. Basic concepts and terminology
3. Bandwidth usage distribution
3.1. Single object
3.2. Multiple objects
4. Results
4.1. Model validation and bandwidth reservation
4.2. Analysis for different values of the threshold window
4.3. Server configuration
5. Conclusions and ongoing work
Appendix A
Appendix B
References
Vitae

















Computer Networks
Volume 51, Issue 3, 21 February 2007, Pages 569-587
 
Home
Browse
My Settings
Alerts
Help
Elsevier.com (Opens new window)
About ScienceDirect  |  Contact Us  |  Information for Advertisers  |  Terms & Conditions  |  Privacy Policy
Copyright © 2008 Elsevier B.V. All rights reserved. ScienceDirect® is a registered trademark of Elsevier B.V.