12th Workshop on Challenged Networks

Co-located with ACM MobiCom 2017
October 20, 2017 Snowbird, Utah, USA

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. Examples of challenged networks include deployments in rural and remote areas, networks to support emergency response operations, inter-planetary networks, sensor and wildlife monitoring networks, underwater networks, road vehicle networks, and, more recently, networks of micro aerial vehicles. 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.

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, challenged IoT. The increasing availability of wireless communications in embedded devices as well as integration of technologies such as Wi-Fi direct on Android platforms and D2D (device-to-device) communication on general purpose mobile devices, will further push the development of challenged networking solutions. Challenged networking has also chartered new directions for inter-disciplinary research, e.g., applying findings from social networks and network science.

This workshop builds on the success of the eleven previous CHANTS workshops, and WDTN 2005, and aims to stimulate research on the most latest 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 the new directions of challenged networking such as crowdsourcing, mobile cloud/mobile edge/fog computing, IoT, WSN, CPS, mobile data offloading, and challenged SDN. 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, out-of-the-box, 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.


09:00 Welcome

09:00 - 10:00 Keynote: "Scale Matters -- Challenged Networks Everywhere?" by Jörg Ott (TU München, Germany)
Session Chair: Lars Wolf

10:00 - 10:30 Break

10:30 - 12:00 Session 1: Security & IoT
Session Chair: Jörg Ott
  • OTURVA: Securing Device-to-Device (D2D) Communication in IoT Networks
    Ibbad Hafeez (University of Helsinki, Finland); Aaron Yi Ding (Technical University of Munich, Germany); Sasu Tarkoma (University of Helsinki, Finland)
  • Forward Secure Delay-Tolerant Networking
    Signe Rüsch (TU Braunschweig, Germany); Dominik Schürmann (TU Braunschweig, Germany); Rüdiger Kapitza (TU Braunschweig, Germany); Lars Wolf (TU Braunschweig, Germany)
  • LSCHC: Layered Static Context Header Compression for LPWANs
    Khaled Abdel Fadeel (Nimbus Center, Cork Institute of Technology, Ireland); Victor Cionca (Nimbus Center, Cork Institute of Technology, Ireland); Dirk Pesch (Nimbus Center, Cork Institute of Technology, Ireland)

12:00 - 13:00 Lunch Break

13:00 - 14:00 Industry keynote: "5G Network Slicing Management for Challenged Network Scenarios" by Henning Sanneck (Nokia Bell Labs)
Session Chair: Sasu Tarkoma

14:00 - 14:15 2 min presentations of posters and demos

14:15 - 15:30 Session 2: Posters & Demos & Coffee
Session Chair: Anders Lindgren
  • Demo: Siskin: Leveraging the Browser to Share Web Content in Disconnected Environments
    Samuel Sudar (University of Washington, USA); Matt Welsh (Google, Inc., USA); Richard Anderson (University of Washington, USA)
  • Demo: MeshSim: A Wireless Ad-Hoc Network Development Platform
    Marco Caballero Gutierrez (University of Cambridge, UK); Jon Crowcroft (University of Cambridge, UK)
  • Demo: iConfig - What I See is What I Configure
    Michael Haus (Technical University of Munich, Germany); Aaron Yi Ding (Technical University of Munich, Germany); Pan Hui (Hong Kong University of Science and Technology, Hong Kong); Jörg Ott (Technical University of Munich, Germany)
  • Poster: Feasibility of ICN in Automation Networks
    Anders Lindgren (RISE SICS, Sweden); Johan Åkerberg (Mälardalen University, Sweden); Mats Björkman (Mälardalen University, Sweden)
  • Poster: Utilization of Additional Nodes in Hybrid DTN-MANET Scenarios
    Silvia Krug (Technische Universität Ilmenau, Germany); Max Helbig (Technische Universität Ilmenau, Germany); Jochen Seitz (Technische Universität Ilmenau, Germany)
  • Poster: Beyond Static Sending Intervals for Sensor Node Energy Estimation
    Silvia Krug (Technische Universität Ilmenau, Germany); Axl Schreiber (IMMS, Germany); Michael Rink (IMMS, Germany)
  • Poster: Vehicle Routing With Pickup And Delivery: A Greedy Approach
    Turash Mosharraf (Temple University, USA); Jie Wu (Temple University, USA); Huanyang Zheng (Temple University, USA)
  • Poster: PotatoScanner - Using a Field Sprayer as Mobile DTWSN Node
    Björn Gernert (TU Braunschweig, Germany); Lars Wolf (TU Braunschweig, Germany)
15:30 - 17:00 Session 3: Caching & Offloading
Session Chair: Henning Sanneck
  • Implicit Cooperative Caching based on Information Popularity for Vehicular Networks
    Yuhong Li (Beijing Universitiy of Posts and Telecommunications, State Key Laboratory of Networking and Switching Technology, China); Ji Wang (Beijing Universitiy of Posts and Telecommunications, State Key Laboratory of Networking and Switching Technology, China); Anders Lindgren (RISE SICS, Sweden); Xiang Su (Center for Ubiquitous Computing, University of Oulu, Finland); Jukka Riekki (Center for Ubiquitous Computing, University of Oulu, Finland)
  • Per-Chunk Caching for Video Streaming from a Vehicular Cloud
    Luigi Vigneri (EURECOM, France); Salvatore Pecoraro (EURECOM, France); Thrasyvoulos Spyropoulos (EURECOM, France); Chadi Barakat (INRIA, France)
  • Towards Transitions between Role Assignment Schemes: Enabling Adaptive Offloading in Challenged Networks
    Nils Richerzhagen (TU Darmstadt, Germany); Björn Richerzhagen (TU Darmstadt, Germany); Boris Koldehofe (TU Darmstadt, Germany); Ralf Steinmetz (TU Darmstadt, Germany)
17:00 Concluding words

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
  • 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
  • Big data analytics in challenged networking
  • Software-defined networking in challenged environments
  • Security/trust/privacy concerns and solutions in challenged networks
  • Energy-efficient communication in challenged networks
  • Information centric and content-centric networking in challenged networks
  • Real-world mobility trace collection, analysis, and modeling for challenged environments
  • Network science methods for challenged networks
  • Network coding in challenged networks
  • Novel challenged networking systems (e.g., networks of micro aerial vehicles or underwater systems)
  • Real deployment and case studies in various stages of use
  • Disrupted scenarios for challenged networks (e.g., disaster relief and emergency management)
  • Daily use applications (e.g., mobile social networking, crowdsourcing, censorship evasion, sensor networks, smart cities)
  • Test and simulation tools for evaluating challenged network systems
  • Configuration, management, and monitoring of challenged networks.

Paper format and Submission

General papers

Submitted papers must be no longer than 6 pages, and should adhere to the standard ACM conference proceedings format. Reviews will be single-blinded. Papers should neither have been published elsewhere nor being currently under review by another conference or journal.

Posters, demos and industry/position papers
Demo and poster proposals (to be published as part of the proceedings) must not be longer than 2 pages, for demos plus 1 page description of the precise setup and requirements (the 1-page setup description will not be published in the proceedings).
Position and industry papers must not be longer than 4 pages.
Reviews will be single-blinded. Papers should neither have been published elsewhere nor being currently under review by another conference or journal.
Submission system

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 for general papers

(now closed)
Submission deadline for general papers

(now closed)
Submission deadline for posters, demos and industry/position papers
Acceptance notification
Camera ready due To be confirmed


Program Committee Chairs
  • Sasu Tarkoma (University of Helsinki, Finland)
  • Lars Wolf (TU Braunschweig, Germany)
Web Chair
  • Fehmi Ben Abdesslem (SICS Swedish ICT, Sweden)
Publicity Chair
  • Huber Flores (University of Helsinki, Finland)
Steering Committee
  • Kevin Almeroth (UC Santa Barbara, USA)
  • Kevin Fall (Carnegie Mellon University, 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
  • Mostafa Ammar, School of Computer Science, Georgia Tech
  • Fehmi Ben Abdesslem, SICS Swedish ICT
  • Chiara Boldrini, CNR-IIT
  • Guohong Cao, The Pennsylvania State university
  • Marco Cello, Nokia Bell Labs
  • Vania Conan, Thales
  • Marcelo Dias de Amorim, CNRS/LIP6
  • Do Young Eun, North Carolina State University
  • Stephen Farrell, Trinity College Dublin
  • Tristan Henderson, University of St Andrews
  • Andrea Hess, Trinity College Dublin
  • Pan Hui, Hong Kong University of Science and Technology
  • Karin Anna Hummel, JKU Linz
  • Yusheng Ji, National Institute of Informatics
  • Mohan Kumar, Rochester Institute of Technology
  • Anders Lindgren, Swedish Institute of Computer Science
  • Mirco Musolesi, University College London
  • Tatsuo Nakajima, Waseda University
  • Katia Obraczka, University of California at Santa Cruz
  • Joerg Ott, TU München
  • Elena Pagani, Università degli Studi di Milano
  • Andrea Passarella, IIT-CNR
  • Christian Rohner, Uppsala University
  • Eric Rozner, IBM
  • Thrasyvoulos Spyropoulos, EURECOM
  • Sasu Tarkoma, University of Helsinki
  • Stavros Toumpis, Athens University of Economics and Business
  • Thierry Turletti, INRIA
  • Yu Wang, University of North Carolina at Charlotte
  • Lars Wolf, TU Baunschweig
  • Eiko Yoneki, University of Cambridge Computer Laboratory
  • Xiaolan Zhang, Fordham University