latest news

Oct 23, 2013

Slides online.

Aug 30, 2013

2 Keynotes scheduled.

Aug 30, 2013

Program is online.

Aug 13, 2013

Registration is open.

Aug 13, 2013

List of accpeted papers (7)

Aug 13, 2013

Workshop date is fixed.

May 22, 2013

Submission is open.

March 11, 2013

Call for Papers is online.

March 11, 2013

Webpage is online!

Important Dates

Paper Submission

June 21, 2013
July 05, 2013


Acceptance Notification

August 05, 2013


Camera-ready Version

August 16, 2013


Workshop Date

October 07, 2013

additional links

Capacity Sharing Workshop (CSWS'13)

co-located with the 21st International Conference on Network Protocols (ICNP'13),
October 7, Göttingen, Germany.

CSWS'13 presented a workshop program with 7 presentations and 2 keynotes on:

Managing Congestion and providing Assured Service Quality (ASQ) in a Tier1 IP network
by Falk von Bornstaedt (Deutsche Telekom AG)


Reducing Internet Latency [PDF]
by Mat Ford (Internet Society)


Thanks to all keynote speakers, authors, and particants for making this an interesting and lively workshop!


Workshop Objectives

Internet data traffic continues to grow rapidly. In future it will not be cost-efficient anymore to extend the network resources in the same ratio than the traffic demand. Instead applications and transport layer mechanism need to seek new technologies to efficiently utilize available network resources, in particular resource allocation and flow management.

In wireless networks, the problem is particularly relevant due to the inherently limited resources, which render a simple "throwing bandwidth at the problem" solution impossible. For example, IP traffic from mobile data is expected to double each year in the next years. The success of powerful mobile devices like smart phones or tablets to access different kind of Internet service is not only promoting the growth in traffic volume but also changing the traffic pattern.

The Internet has always been an open platform for innovation and thus for new services to evolve. Due to cloud computing in large data centers and the growth of mobile devices, the number of interactive applications with tight requirements on delay is increasing. While the Internet, especially the mobile Internet, was mostly engineered to provide a low loss service, low-latency services are not well supported today.

Virtualizing networks and network functions in data centers and carrier networks enables a more flexible and efficient resource utilization - but creates new challenges for sharing capacity among tenants and users of those networks. For example, scaling up network resources can be triggered by observed congestion but can also affect the performance characteristics of virtual network slices. At the same time, Network Function Virtualization and Software-Defined Networking open new possibilities for implementing capacity sharing.

This change in network operation and the strong growth and continual changes in the traffic characteristics and usage behavior raises questions on how to share limited capacity resources fairly and more efficiently. While efficiency is most important when resources are spare, fairness need to be evaluated based on the different quality requirements of the various Internet services that we have today.

In commercially operated networks, traffic management is often used to react to observed congestion or disproportionate resource usage. The challenge is to enable these different kinds of applications and to traffic management that maintains high degrees of resource utilization, a reasonable distribution of capacity without affecting transport protocol and application performance and impeding innovation and scalability. One of the questions that the workshop could address is whether and how Capacity Sharing can support traffic management evolving in this direction. We want to encourage researchers to consider integrated consideration of the problem space over all layers.

For information about how to submit your paper, please visit the Call for Papers page.

Workshop Chairs

Dirk Kutscher, NEC Laboratories Europe, Heidelberg, Germany
Mirja Kühlewind, IKR, University of Stuttgart, Germany

If you have any questions, please contact the organizing committee at
CapacitySharingWS@ikr.uni-stuttgart.de