Dirk Kutscher

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1st ACM Conference on Information-Centric Networking (ICN-2014)

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ICN Conference Logo

Four days to go until our first ICN conference!

It’s going to be a blast of an event with a high-quality program, tutorials, demos, and panel discusions.

Check out the program: http://conferences2.sigcomm.org/acm-icn/2014/

Hope to see you in Paris at the conference.


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September 20th, 2014 at 6:25 pm

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SIGCOMM-2014 Workshop on Capacity Sharing (CSWS-2014)

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The program of our Capacity Sharing Workshop at SIGCOMM-2014 (CSWS-2014, August 18th in Chicago) is online. This should be an interesting workshop — we have received many interesting submissions and were able to compile a real good program:


Queuing and Scheduling

  •  Revisiting Old Friends: Is CoDel Really Achieving What RED Cannot? (Nicolas Kuhn, Emmanuel Lochin and Olivier Mehani)
  • Managing Fairness and Application Performance with Active Queue Management in DOCSIS-based Cable Networks (James Martin, Gongbing Hong and James Westall)
  • WQM: An Aggregation-Aware Queue Management Scheme for IEEE 802.11n Based Networks (Ahmad Showail, Kamran Jamshaid and Basem Shihada)

Transport Protocols

  • Coupled Congestion Control for RTP Media (Safiqul Islam, Michael Welzl, Stein Gjessing and Naeem Khademi)
  • Experimental Evaluation of Multipath TCP Schedulers (Christoph Paasch, Simone Ferlin, Özgü Alay and Olivier Bonaventure)

Mobile Networks

  • ConEx Lite for Mobile Networks (Steve Baillargeon and Ingemar Johansson)
  • Mobile Network Sharing Between Operators: A Demand Trace-Driven Study (Paolo Di Francesco, Francesco Malandrino and Luiz Dasilva)
  • Network Assisted Rate Adaptation for Conversational Video over LTE, Concept and performance evaluation (Ylva Timner, Jonas Pettersson, Hans Hannu, Min Wang and Ingemar Johansson)
  • Self-clocked rate adaptation for conversational video in LTE (Ingemar Johansson)
  • Dynamic Bandwidth Allocation for Multiple Network Connections: Improving User QoE and Network Usage of YouTube in Mobile Broadband (Florian Wamser, Thomas Zinner, Phuoc Tran-Gia and Jing Zhu)


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June 7th, 2014 at 2:59 pm

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Capacity Sharing Workshop @ SIGCOMM 2014

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Changing usage behavior, increasing demand for bandwidth as well as a continuous trend towards virtualizing networks and network functions raise questions on how to share limited capacity resources fairly and more efficiently while maintaining the best possible Quality of Experience (QoE) for users. 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. For example, the Internet, especially the mobile Internet, was mostly engineered to provide a low loss service, low-latency services are not well supported today. In data centers, virtualization and high utilization promise economic benefits. However, effective, yet practical capacity sharing between tenants and applications is an important requirement. This has led to the development of enhancements in capacity sharing, especially congestion control mechanisms — some of these mechanisms are domain-specific, others lend themselves to adoption or generalization for inter-connected networks.

We are running a workshop on Capacity Sharing at SIGCOMM 2014 that invites submissions on these topics.

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January 28th, 2014 at 9:12 pm

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ACM SIGCOMM Conference on Information-Centric-Networking (ICN-2014)

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We are running a conference on ICN in September 2014!

Some dates of interest:

  • May 30, 2014: Paper Submission Deadline
  • July 1, 2014: Tutorial and Panel Proposal Deadline
  • September 24-26, 2014: Conference

More information: http://conferences2.sigcomm.org/acm-icn/2014/index.php

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January 11th, 2014 at 8:38 pm

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Capacity Sharing Workshop 2011: Program Announced

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We have fixed the program for our Capacity Sharing Workshop on October 13th this year. We have received excellent contributions — it’s going to be a very interesting event.

The technical program:

08:30 Registration and Coffee
08:45 Welcome

Session 1: Congestion Management in Mobile Broadband Networks

  • Capacity Sharing: Bringing Together Cost, Value and Control
    Bob Briscoe (BT)
  • Congestion Exposure in Mobility Scenarios
    Faisal Ghias Mir, Dirk Kutscher, Marcus Brunner (NEC)
  • Enhanced Capacity Management – how to monitor, control, and steer your service quality!
    Dr. Wolfgang Knospe (Detecon International GmbH)
  • Bridging QoE and QoS for Mobile Broadband Networks
    David Soldani (Huawei)
  • 10:45 Coffee

    Session 2: Transport Layer QoS

  • Considerations for controlling TCP’s fairness on end hosts
    Michael Welzl (Department of Informatics, University of Oslo)
  • Trading loss against delay in Networked Control Systems
    Rainer Blind (Networked Control Systems (NCS), University of Stuttgart)
  • Fair Background Data Transfers of Minimal Delay Impact
    Costas Courcoubetis, Antonis Dimakis (Athen University of Economics and Business)
  • Multipath Transport Challenges and Solutions
    Michael Scharf (Bell Labs Stuttgart)
  • 12:45 Lunch
    13:45 Session 3: QoS in Wireless Networks

  • QoS and QoE in the Next Generation Networks: application to wireless networks
    Prof. Pascal Lorenz (University of Haute Alsace)
  • Improving the Usability of Cellular Charging Solutions
    Christian Hoene (University of Tübingen)
  • Context-Aware Resource Allocation for Media Streaming: Exploiting Mobility and
    Application-Layer Predictions
  • Hatem Abou-zeid, Stefan Valentin (Bell Labs Alcatel-Lucent Stuttgart)
    and Hossam Hassanein (Queen’s University, Canada)

  • Context-aware Scheduling in Radio Access Networks
    Magnus Proebster, Matthias Kaschub, Thomas Werthmann (IKR, Uni Stuttgart)
  • 15:30 Coffee

    Session 4: Applications and Services

  • Mobile Video Traffic Optimization at Telecom Italia
    Gianni Canal, Agostino Cotevino, Vincenzo Condo, Enrico Marocco (Telecom Italia)
  • Towards More Adaptive Voice Applications
    Jörg Ott (Comnet, Aalto University)
  • Resource (Re)allocation and Admission Control for Adaptive Multimedia Services
    Krunoslav Ivesic (University of Zagreb)
  • Active Shared Access Network Congestion Avoidance in Heterogeneous Application-Layer Multicast
    Christian Hübsch (Institute of Telematics, Karlsruhe Institute of Technology (KIT))
  • 17:30 Wrap-Up and Conclusions
    18:00 End

    Check out the details at the workshop website.

    Written by dkutscher

    August 29th, 2011 at 9:48 am

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    SIGCOMM 2011 Workshop on Information-Centric Networking

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    We have published a short report of last week’s ICN workshop at SIGCOMM. It was a really interesting event, with excellent papers and presentations and an inspiring panel discussion.

    The two selected best papers are:

    Ali Ghodsi, Teemu Koponen, Jarno Rajahalme, Pasi Sarolahti and Scott Shenker; Naming in Content-Oriented Architectures

    Diego Perino and Matteo Varvello; A Reality Check for Content Centric Networking

    You can download them and all the other papers at the workshop website.

    Written by dkutscher

    August 29th, 2011 at 9:42 am

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    Capacity Sharing Workshop 2011

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    With the increasing amount of IP traffic in fixed and mobile access networks, the question how to share the available resources in a fair, efficient and demand-oriented way becomes more and more prevalent. With the variety of services one can find in today’s Internet, the requirements in rate, data volume and latency differ strongly. To maximize resource utilization and, at the same time, provide satisfying performance to all users, application layer knowledge is needed. As different resource allocation and adaptation mechanisms already exist in MAC, transport and application layer, an integral consideration of the problem space is required.

    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. Because large over-provisioning factors are economically unfeasibly, similar questions on capacity sharing also arise in fixed access networks, such as high bandwidth passive optical networks or cable networks.

    NEC Laboratories Europe and the Institute of Communication Networks and Computer Engineering (IKR) of the University of Stuttgart are organizing workshop on Capacity Sharing to address these topics. The objective of this workshop is to bring together stakeholders of mobile and fixed access networks, the classic Internet world and of the application and transport community. We solicit presentations on the state-of-the-art, results of ongoing research, open issues, trends and new ideas. We are especially looking forward to (possibly provocative) visionary presentations to foster a lively discussion about how to face the upcoming challenges in the future mobile Internet. Topics of particular interest include, but are not limited to

    • Application-layer adaption for mobile services
    • Transport layer solutions and possible interactions with cellular/fixed access networks
    • Context-aware resource allocation & cross-layer adaptation
    • QoE and fairness definitions, metrics and evaluation
    • Data traffic characteristics in fixed and mobile Internet
    • Economic aspects on capacity sharing and business models
    • Similarities and differences of capacity sharing in mobile and fixed access networks
    • Related standardization activities and projects

    The workshop takes place in Stuttgart on Thursday, October 13, 2011, and is organized by Mirja Kühlewind (IKR), Christian Mueller (IKR) and myself.

    More information: http://www.ikr.uni-stuttgart.de/CapacitySharingWS/

    Written by dkutscher

    May 3rd, 2011 at 1:38 pm

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    URIs for Named Information

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    URIs [RFC3986] are used in various protocols for identifying resources. In many deployments those URIs contain strings that are hash function outputs in order to ensure uniqueness in terms of mapping the URI to a specific resource, or to make URIs hard to guess for security reasons. However, there is no standard way to interpret those strings and so today in general only the creator of the URI knows how to use the hash function output.

    In the context of information-centric networking and elsewhere there is value in being able to compare a presented resource against the URI that was de-referenced in order to access that resource. If a cryptographically-strong comparison function can be used then this allows for many forms of in-network storage, without requiring as much trust in the infrastructure used to present the resource. The outputs of hash functions can be used in this manner, if presented in a standard way. There are also many other potential uses for these hash outputs, for example, in terms of binding the URI to an owner via signatures and public keys, mapping between names, handling versioning etc. Many such uses can be based on “wrapping” the object with meta-data, e.g. including signatures, public key certificates etc.

    We therefore define the “ni” URI scheme that allows for, but does not insist upon, checking of the integrity of the URI/resource mapping.

    The “ni” URI scheme is specified in draft-farrell-ni-00

    Written by dkutscher

    April 19th, 2011 at 2:04 pm

    Towards an Information-Centric Internet with more Things

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    The Internet is already made of things. However, we expect there
    to be many more less-capable things, such as sensors and
    actuators, connected to the Internet in years to come. In
    parallel, Internet applications are more and more being used to
    perform operations on named (information) objects, and various
    Information-Centric Networking (ICN) approaches are being
    researched in order to allow such applications to work
    effectively at scale and with various forms of mobility and in
    networking environments that are more challenging than a
    traditional access network and data center. In a recent position
    paper, we outline some benefits that may accrue, and issues that
    arise, should the Internet, with many more things, make use of
    the ICN approach to networking and we argue that ICN concepts
    should be considered when planning for increases in the number of
    things connected to the Internet.

    Venue: Interconnecting Smart Objects with the Internet Workshop Prague, Friday, 25th March 2011
    Paper: http://www.iab.org/about/workshops/smartobjects/papers/Kutscher.pdf
    Presentation: http://www.iab.org/about/workshops/smartobjects/slides/Kutscher.pdf

    Written by dkutscher

    March 26th, 2011 at 9:34 am

    DECADE Architecture

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    We have submitted a new version of the DECADE architecture draft, which is now a work item of the IETF DECADE WG.

    Peer-to-peer (P2P) applications have become widely used on the
    Internet today and make up a large portion of the traffic in many
    networks. One technique to improve the network efficiency of P2P
    applications is to introduce storage capabilities within the
    networks. The DECADE Working Group has been formed with the goal of
    developing an architecture to provide this capability. This document
    presents an architecture, discusses the underlying principles, and
    identifies core components and protocols supporting the architecture.

    The Internet Draft: draft-ietf-decade-arch

    Written by dkutscher

    March 9th, 2011 at 3:13 pm

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