Now showing items 1-14 of 14

    • CitySense: A Vision for an Urban-Scale Wireless Networking Testbed 

      Murty, Rohan; Gosain, Abhimanyu; Tierney, Matthew; Brody, Andrew; Fahad, Amal; Bers, Josh; Welsh, Matt (2007)
      In this paper, we present the vision for an open, urban-scale wireless networking testbed, called CitySense, with the goal of supporting the development and evaluation of novel wireless systems that span an entire city. ...
    • CodeBlue: An Ad Hoc Sensor Network Infrastructure for Emergency Medical Care 

      Malan, David J.; Fulford-Jones, Thaddeus; Welsh, Matt; Moulton, Steve (2004)
      Sensor devices integrating embedded processors, low-power, low-bandwidth radios, and a modest amount of storage have the potential to enhance emergency medical care. Wearable vital sign sensors can track patient status and ...
    • A Cost-Space Approach to Distributed Query Optimization in Stream Based Overlays 

      Shneidman, Jeffrey; Pietzuch, Peter; Welsh, Matt; Seltzer, Margo; Roussopoulos, Mema (IEEE Computer Society, 2005)
      Distributed stream-based applications, such as continuous query systems, have network scale and time characteristics that challenge traditional distributed query optimization. The optimization sub-problems of plan generation ...
    • Decentralized, Adaptive Resource Allocation for Sensor Networks 

      Mainland, Geoffrey Bruce; Parkes, David C.; Welsh, Matthew D (USENIX, 2005)
      This paper addresses the problem of resource allocation in sensor networks. We are concerned with how to allocate limited energy, radio bandwidth, and other resources to maximize the value of each node's contribution to ...
    • Evaluating DHT-Based Service Placement for Stream Based Overlays 

      Pietzuch, Peter; Shneidman, Jeffrey; Ledlie, Jonathan; Welsh, Matt; Seltzer, Margo; Roussopoulos, Mema (Springer Verlang, 2005)
      <i>Stream-based overlay networks</i> (SBONs) are one approach to implementing large-scale stream processing systems. A fundamental consideration in an SBON is that of <i>service placement</i>, which determines the physical ...
    • Flask: Staged Functional Programming for Sensor Networks 

      Mainland, Geoffrey; Morrisett, John Gregory; Welsh, Matt (Association for Computer Machinery, 2008)
      Severely resource-constrained devices present a confounding challenge to the functional programmer: we are used to having powerful abstraction facilities at our fingertips, but how can we make use of these tools on a device ...
    • Implementing Public-Key Infrastructure for Sensor Networks 

      Malan, David; Welsh, Matt; Smith, Michael (Association for Computing Machinery, 2008)
      We present a critical evaluation of the first known implementation of elliptic curve cryptography over F<sub>2p</sub> for sensor networks based on the 8-bit, 7.3828-MHz MICA2 mote. We offer, along the way, a primer for ...
    • LiveNet: Using Passive Monitoring to Reconstruct Sensor Network Dynamics 

      Chen, Bor-rong; Peterson, Geoffrey; Mainland, Geoff; Welsh, Matt (2007)
      Understanding the behavior of deployed sensor networks is difficult as they become more sophisticated and larger in scale. Much of the difficulty comes from the lack of tools to provide a global view on the network dynamics. ...
    • Monitoring Motor Fluctuations in Patients With Parkinson’s Disease Using Wearable Sensors 

      Patel, Shyamal; Lorincz, Konrad; Hughes, Richard Allen; Huggins, Nancy; Growdon, John Herbert; Standaert, David; Akay, Metin; Dy, Jennifer; Welsh, Matthew D; Bonato, Paolo (Institute of Electrical and Electronics Engineers, 2009)
      This paper presents the results of a pilot study to assess the feasibility of using accelerometer data to estimate the severity of symptoms and motor complications in patients with Parkinson’s disease. A support vector ...
    • Open Problems in Data Collection Networks 

      Ledlie, Jonathan; Shneidman, Jeffrey; Welsh, Matt; Roussopoulos, Mema; Seltzer, Margo (ACM, 2004)
      Research in sensor networks, continuous queries (CQ), and other domains has been motivated by powerful applications that aim to aggregate, assimilate, and interact with scores of sensor networks in parallel. Numerous system ...
    • A Public-Key Infrastructure for Key Distribution in TinyOS Based on Elliptic Curve Cryptography 

      Malan, David; Welsh, Matt; Smith, Michael (IEEE, 2004)
      We present the first known implementation of elliptic curve cryptography over F2p for sensor networks based on the 8-bit, 7.3828-MHz MICA2 mote. Through instrumentation of UC Berkeley's TinySec module, we argue that, ...
    • Sensor Networks for Medical Care 

      Shnayder, Victor; Chen, Bor-rong; Lorincz, Konrad; Fulford-Jones, Thaddeus R. F.; Welsh, Matt (2005)
      Sensor networks have the potential to greatly impact many aspects of medical care. By outfitting patients with wireless, wearable vital sign sensors, collecting detailed real-time data on physiological status can be greatly ...
    • Using Virtual Markets to Program Global Behavior in Sensor Networks 

      Mainland, Geoffrey Bruce; Kang, Laura; Lahaie, Sébastien; Parkes, David C.; Welsh, Matthew D (Association for Computing Machinery, 2004)
      This paper presents market-based macroprogramming (MBM), a new paradigm for achieving globally efficient behavior in sensor networks. Rather than programming the individual, low-level behaviors of sensor nodes, MBM defines ...
    • A Utility-Based Approach to Bandwidth Allocation and Link Scheduling in Wireless Networks 

      Ma, Qicheng; Parkes, David C.; Welsh, Matthew D (2007)
      We study the problem of optimizing aggregate user utility in wireless ad-hoc networks under the constraints of wireless interference. We develop a market-oriented approach to bandwidth allocation with a tˆatonnement process ...