Second Workshop on Challenged Networks (CHANTS) 2007 ==================================================== Co-located with MobiCom 2007, 14 September 2007, Montreal, QC, Canada http://chants-2007.netlab.tkk.fi/ Challenged networks are characterized by a heterogeneous mix of nodes and widely varying network conditions. Nodes in today's challenged networks often include mobile nodes, space-based nodes, sensor/actuator nodes and other devices. Performance of the network paths interconnecting such nodes can be highly varying in terms of bandwidth, latency, disruption characteristics and security requirements. Conventional Internet access in performance-limited environments such as developing countries can also be regarded as challenged networks as can be ad-hoc communication between personal devices. The Internet protocol architecture suffers some problems when used in a challenged network setting. For example, when disconnection and reconnection is common or link performance is highly variable or extreme, one or more of the traditional Internet protocols do not work well. In this workshop following CHANTS 2006 and WDTN 2005, we wish to explore ongoing efforts in dealing with physical networks that operate significantly differently from wired, connected networks and the protocol architectures and algorithms used to deal with such situations. Techniques for making applications tolerant to disruptions and/or high delays are also in scope. We specifically solicit papers in the following areas: * Characterization of performance-challenged networks, e.g.m network measurements * Networking systems operating over unusual/challenged networks * Protocol design and evaluation of operations over challenged networks * System architecture and design for challenged networks * Applications in challenged networks * Robust network application design and implementation techniques * Delay tolerant and disruption tolerant networks (DTN) * Configuration and management of challenged networks Submissions may include presentations of specific systems or performance measurements, as well as architectural papers addressing new concerns. Papers that bring out problems in the existing proposals for challenged networks or that report operational experience will be favored. Selected papers will be forward-looking, will describe their relationship to existing work, and will have impact and implications for ongoing or future research. We aim to accept approximately 12 papers, and to have a highly interactive workshop focusing on evolving this area of network research and continuing to build its community. In addition, we seek submission of demo proposals, also to be reviewed by the TPC. The demo proposals shall present recent practical results from the area of challenged networks. In exceptional cases, where live demos are simply not practical to present, poster or video presentations of practical results are acceptable, too. Paper Format and Submission --------------------------- Submitted papers must be no more than 8 pages long, two columns, with no characters in smaller than 10 point fonts, and must fit properly on US "Letter"-sized paper (8.5x11 inches). Margins must be of 1 inch on all edges (top, bottom, left, and right) of each page. Demo proposal abstracts (to be published as part of the proceedings) shall not be longer than 3 pages plus 1 page description of the precise setup and requirements. All paper submission will be handled via EDAS. Papers will be reviewed single blind. Paper submission URI: http://edas.info/5526 Important Dates (updated!) -------------------------- Paper submission deadline: 23 May 2007 (extended) Demo submission deadline: 4 June 2007 Notification of acceptance: 18 June 2007 Camera Ready Deadline: 13 July 2007 Workshop Date: 14 September 2007 Workshop Chairs --------------- Jörg Ott Helsinki University of Technology (TKK) Rajesh Krishnan BBN Technologies Steering Committee ------------------ Kevin Almeroth, University of California, Santa Barbara Mostafa Ammar, Georgia Institute of Technology Christophe Diot, Thomson Research, Paris, France Deborah Estrin, University of California, Los Angeles Kevin Fall, Intel Research Berkeley Jörg Ott, Helsinki University of Technology, Finland James Scott, Microsoft Research Cambridge, UK Technical Program Committee --------------------------- Mostafa Ammar, Georgia Institute of Technology Prithwish Basu, BBN Technologies Scott Burleigh, NASA/JPL Chen-Nee Chuah, University of California, Davis Mooi Choo Chuah, Lehigh University Vania Conan, Thales Architecture Framework Centre Marco Conti, IIT-CNR Christophe Diot, Thomson Deborah Estrin, University of California at Los Angeles Kevin Fall, Intel Research Stephen Farrell, Trinity College Dublin Silvia Giordano, University of Applied Science - SUPSI Stephen Hailes, UCL Sushant Jain, Google Gunnar Karlsson, KTH, Royal Institute of Technology Srinivasan Keshav, University of Waterloo Dirk Kutscher, University of Bremen Jeremie Leguay, Univ. Pierre et Marie Curie Cecilia Mascolo, University College London Andrea Passarella, IIT-CNR Kaustubh Phanse, Lulea University of Technology James Scott, Microsoft Research Keith Scott, MITRE Arun Venkataramani, UMass Amherst Ellen Zegura, Georgia Institute of Technology