13th Workshop on Challenged Networks

Co-located with ACM MobiCom 2018
October 29, New Delhi, India

About the workshop

Challenged networks comprise those situations where communication is desired, but traditional Internet architectures fail to provide it effectively. Such networks may be characterized by intermittent connectivity, a heterogeneous mix of nodes, frequent nodal churn, and widely varying network conditions. The applications of challenged networks range from time-critical communications such as for disaster relief to delay-tolerant transmission in poorly connected regions or where censorship should be counteracted. However, challenged networking has also found many applications in everyday settings, for which they were not initially conceived, such as opportunistic networking supporting data-centric communications, traffic offloading from cellular networks, mobile cloud/edge computing, opportunistic and participatory sensing as well as challenged IoT.

This workshop builds on the success of the twelve previous CHANTS workshops, and WDTN 2005, and aims to stimulate research on the most novel topics of challenged networking research. This year's edition encourages submission of theoretical and experimental work (including studies of real deployment), with a primary interest in new directions of challenged networking in concrete application scenarios and demonstrators in areas such as autonomous driving, underwater robots, emergency response operations, underground mining, interplanetary missions, polar research and unmanned aerial vehicles. The workshop seeks original work presented in the form of research papers describing new research approaches and results, as well as demo and poster submissions. Highly disruptive work-in-progress and position papers are also welcome, provided they focus on particularly innovative solutions or applications for challenged networks. All papers shall be forward-looking, describe their relationship to existing work, and shall argue their impact and implications for ongoing or future research.

Topics of Interest

Topics of interest include, but are not limited to:
  • Delay/disruption-tolerant networks (DTNs), opportunistic communication and computing
  • Architecture, design, and implementation of communication systems for challenged networks
  • Communication systems and networks for underground mining
  • Underwater communication systems and networks
  • Security/trust/privacy concerns and solutions in challenged networks
  • Networking in polar regions
  • Millimeter Wave Networking
  • Modeling, analysis, and characterization of challenged networks and protocols
  • Challenged networking techniques for mobile cloud computing
  • Mobile data offloading via challenged networks
  • Challenged networking techniques for participatory and opportunistic sensing
  • Challenged networking in the Internet of Things
  • Challenged networking in Cyber-Physical Systems
  • Software-defined networking in challenged environments
  • Energy-efficient communication in challenged networks
  • Space-terrestrial networks, lunar networks as well as interplanetary networks
  • Information centric and content-centric networking in challenged networks
  • Real-world mobility trace collection, analysis, and modeling for challenged environments
  • Network coding in challenged networks
  • Real deployment and case studies in various stages of use
  • Disrupted scenarios for challenged networks (e.g., disaster relief and emergency management)
  • User Interfaces and interactive applications optimized for Challenged Networks
  • Test and simulation tools for evaluating challenged network systems
  • Configuration, management, and monitoring of challenged networks.


09:50 - 10:00 Chairs' Welcome

10:00 - 11:00 Keynote: "Chant or Starve: New Opportunities in Next Generation Challenged Networks"
by Prof. Sajal K. Das

Important update: Due to an unforeseen event, Prof. Das will not be able to deliver his keynote.
Title of Alternative Keynote: "Context Sensing from Energy-Harvesting Patterns in Power-Challenged IoTs"
Speaker: Prof. Mahbub Hassan, University of New South Wales.

We are delighted to announce that Professor Sajal K. Das will be giving the keynote speech. Prof. Das is the Daniel St. Clair Endowed Chair Professor of the Computer Science Department at the Missouri University of Science and Technology.

Abstract: Challenged Networks (CHANTS) have made significant strides in more classical, often resource-starved, application domains such as disaster response, search and rescue operations, rural and opportunistic communications, vehicular and inter-planetary networks, etc. An intriguing question is: Do CHANTS have the potential to become a more mainstream technology and support innovative applications in everyday settings involving large-scale networks, such as IoTs, cyber-physical systems, crowd sensing, mobile cloud computing, smart and connected communities, to name a few? What are the most important technical challenges behind realization of the true potential of next generation CHANTS? What are the unique research opportunities? This talk will identify some of the underlying challenges as well as provide novel solutions in this direction.

Prof. Sajal K. Das Bio: Sajal K. Das is a professor of Computer Science and the Daniel St. Clair Endowed Chair at the Missouri University of Science and Technology, USA. His research interests include wireless sensor networks, crowd sensing, cyber physical systems, smart environments (e.g., smart city, smart grid and smart health care), distributed and cloud computing, data analytics, IoTs, cyber security, biological and social networks, and applied graph theory and game theory. He has published extensively in these areas with over 700 research articles in high quality journals and refereed conference proceedings. Dr. Das holds 5 US patents and coauthored 4 books. His h-index is 82 with more than 27,000 citations according to Google Scholar. He is a recipient of 10 Best Paper Awards at prestigious conferences like ACM MobiCom and IEEE PerCom, and numerous awards for teaching, mentoring and research including the IEEE Computer Society’s Technical Achievement Award for pioneering contributions to sensor networks and mobile computing. He serves as the founding Editor-in-Chief of Elsevier’s Pervasive and Mobile Computing Journal, and as Associate Editor of several journals including the IEEE Transactions of Mobile Computing and ACM Transactions on Sensor Networks. Dr. Das is an IEEE Fellow.

11:00 - 11:30 Break

11:30 - 12:45 Session 1, chaired by Felix Walter (Technische Universität Dresden)
  • Conducting a Large-scale Field Test of a Smartphone-based Communication Network for Emergency Response
    Flor Alvarez (TU Darmstadt, Germany), Lars Almon (TU Darmstadt, Germany), Patrick Lieser (TU Darmstadt, Germany), Tobias Meuser (TU Darmstadt, Germany), Yannick Dylla (TU Darmstadt, Germany), Björn Richerzhagen (TU Darmstadt, Germany), Matthias Hollick (TU Darmstadt, Germany), and Ralf Steinmetz (TU Darmstadt, Germany)
  • On the Connectivity of a Mobile Ad-Hoc Network for Firemen
    Orangel Azuaje (University of Porto, Portugal) and Ana Aguiar (University of Porto, Portugal)
  • An Approach for Black-hole Attack Mitigation in Disruption-tolerant Ad-hoc Smartphone Networks
    Manuel Weiflbach (TU Dresden, Germany), and Marius Feldmann (TU Dresden, Germany)

12:45 - 14:00 Lunch Break

14:00 - 15:15 Session 2, chaired by Mahbub Hassan (University of New South Wales)
  • Mobile User Identification by Camera-Based Motion Capture and Mobile Device Acceleration Sensors
    Ryota Kosono (Kyoto University, Japan), Takayuki Nishio (Kyoto University, Japan), Masahiro Morikura (Kyoto University, Japan), Koji Yamamoto (Kyoto University, Japan), Yuichi Maki (NTT, Japan), Takuya Goda (NTT, Japan), Hisashi Matsukawa (NTT, Japan), and Takuya Indo (NTT, Japan)
  • Delay Tolerant Computing: The Untapped Potential
    Mohammad Aazam (Carnegie Mellon University, Qatar), Khaled A. Harras (Carnegie Mellon University, Qatar), and Ali E. Elgazar (Carnegie Mellon University, Qatar)
  • Impacts of Human Mobility in Data Offloading
    Emanuel Lima (Instituto de TelecomunicaÁıes, University of Porto, Portugal), Ana Aguiar (Instituto de TelecomunicaÁıes, University of Porto, Portugal), Aline Viana (INRIA, France), and Paulo Carvalho (University of Minho, Portugal)
15:15 - 16:30 Session 3, chaired by Felix Walter (Technische Universität Dresden)
  • Multi-Headed MPTCP Schedulers to Control Latency in Long-Fat/Short-Skinny Heterogeneous Networks
    Brenton Walker (Leibniz University Hannover, Germany), Vu Anh Vu (Leibniz University Hannover, Germany), and Markus Fidler (Leibniz University Hannover, Germany)
  • Congestion Control for Future Mobile Networks
    Simone Mangiante (Vodafone, United Kingdom), Michael Schapira (Hebrew University of Jerusalem, Israel), Amit Navon (Huawei, Israel), Marco Silva (Vodafone, United Kingdom), Brighten Godfrey (University of Illinois at Urbana-Champaign, United States), Weiguang Wang (Huawei China), Kevin Smith (Vodafone, United Kingdom), and Itzcak Pechtalt (Huawei, Israel)
  • Message in a Bottle: Extending Communication Coverage Via Boat-to-Boat WiFi Communication
    Ahmed Emam (Carnegie Mellon University, Qatar), Abderrahmen Mtibaa (New Mexico State University, United States), Khaled Harras (Carnegie Mellon University, United States)

Paper formats and Submission

General Paper format
Submitted papers must be no longer than 6 pages, and should adhere to the standard ACM conference proceedings format. Authors must register the abstract 1 week prior to the full paper submission.
Demo/Poster format

Demo and poster proposals will be published as part of the proceedings and must not be longer than 2 pages. For demos, an additional page must describe the precise setup and requirements. This page will not be published in the proceedings.


Reviews will be single-blinded. Papers should neither have been published elsewhere nor being currently under review by another conference or journal.

Please use EasyChair to submit your papers.

Editorial Follow-ups

Extended versions of the selected workshop papers will be considered for possible fast track publication in well-known journals. Candidate journals are, e.g., Computer Communications (Elsevier) or the ACM GetMobile.

Important Dates

Please make note of the following dates
Abstract registration (General Papers, Optional)
Submission deadline
Acceptance notification
Camera ready due


Program Committee Chairs
  • Marius Feldmann (Technische Universität Dresden, Germany)
  • Mahbub Hassan (University of New South Wales, Australia)
Web Chair
  • Fehmi Ben Abdesslem (RISE SICS, Sweden)
Publicity Chair
  • Guohao Lan (University of New South Wales, Australia)
  • Felix Walter (Technische Universität Dresden, Germany)
Steering Committee
  • Kevin Almeroth (UC Santa Barbara, USA)
  • Kevin Fall (Nefeli Networks, USA)
  • Stephen Farrell (Trinity College Dublin, Ireland)
  • Jörg Ott (Technische Universität München, Germany)
  • Andrea Passarella (IIT-CNR, Italy)
Technical Program Committee
  • Kevin Almeroth, UC Santa Barbara, USA
  • Mostafa Ammar, Georgia Institute of Technology, USA
  • Fehmi Ben Abdesslem, RISE SICS, Sweden
  • Chiara Boldrini, IIT CNR, Italy
  • Scott Burleigh, Jet Propulsion Laboratory, USA
  • Carlo Caini, University of Bologna, Italy
  • Vania Conan, Thales Communications & Security, France
  • Swades De, IIT Delhi, India
  • Kevin Fall, Nefeli Networks, USA
  • Stephen Farrell, Trinity College Dublin, Ireland
  • Juan Andres Fraire, Universidad Nacional de Cordoba, Argentina
  • R.K. Ghosh, IIT Kharagpur, India
  • Andrea Hess-Wijaya, Trinity College Dublin, Ireland
  • Karin Anna Hummel, JKU Linz, Austria
  • Guillaume Jourjon, CSIRO, Australia
  • Kyunghan Lee, UNIST, Korea
  • Anders Lindgren, RISE SICS, Sweden
  • Mirco Musolesi, University College London, UK
  • Tatsuo Nakajima, Waseda University, Japan
  • Katia Obraczka, University of California at Santa Cruz, USA
  • Joerg Ott, TU München, Germany
  • Elena Pagani, Università degli Studi di Milano, Italy
  • Andrea Passarella, IIT-CNR, Italy
  • Thrasyvoulos Spyropoulos, EURECOM, France
  • Thorsten Strufe, TU Dresden, Germany
  • Thierry Turletti, INRIA, France
  • Carlo Vallati, University of Pisa, Italy
  • Yu Wang, University of North Carolina at Charlotte, USA
  • Klaus Wehrle, RWTH Aachen University, Germany
  • Sangki Yun, Hewlett Packard Labs, USA