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Departments >> Faculty of Engineering >> Department of Computer Science >> Chair of Computer Science 6 (Data Management) >>
RDSP: Research Group - Resource-constrained Distributed Stream Processing

We research an integrated approach for supporting in-network sensor data processing in dynamic and heterogeneous sensor networks. The concept relies on data stream processing techniques that define and optimize the distribution of queries and their operators.
The Project is approached from three different directions:
  • DSAM (Data Stream Application Manager): DSAM is a central manager of data stream applications. Its main goal is the integration of heterogeneous Stream Processing Systems (SPSs). As it is not practicable to send all data to a central site, DSAM supports distributed query processing (also called in-network query processing in WSNs). DSAM achieves this integration by using the MDA approach. We use abstract queries that describe the global queries and correspond to the PIM of the MDA.

  • Operating Systems: We are developing a framework for stateful migration of modules. This framework allows us to migrate data stream operators from one node to another one without losing its state.

  • Energy cost and lifetime estimation: There are many reasons to migrate DS-Operators from one node to another. One of the most important in WSNs is the lifetime of the network. To estimate a battery-driven mote's lifetime a sophisticated estimation of energy costs is needed. This must not only include the energy needed to run a node, but also the costs of migrating operators. Based on these estimations the DSAM can decide to reorganize the DS-operators.

Project participants:
Prof. Dr.-Ing. Rüdiger Kapitza, PD Dr.-Ing. habil. Falko Dressler, Dr.-Ing. Michael Daum, Dr.-Ing. Moritz Strübe, Dr.-Ing. Niko Pollner

WSN, sensor network, BTnode, Tmote sky, TelosB, database, Stream Processing

Start: 1.9.2009

Strübe, Moritz ; Kapitza, Rüdiger ; Stengel, Klaus ; Daum, Michael ; Dressler, Falko: Stateful Mobile Modules for Sensor Networks. In: Rajaraman, Rajmohan ; Moscibroda, Thomas ; Dunkels, Adam ; Scaglione, Anna (Ed.) : IEEE (Org.) : Distributed Computing in Sensor Systems (6th IEEE International Conference, DCOSS 2010, Proceedings) (6th IEEE International Conference for Distributed Computing in Sensor Systems (DCOSS ’10) Santa Barbara, California June 2010). Berlin : Springer, 2010, pp 63-76. (Lecture Notes in Computer Science Vol. LNCS, No. 6131) - ISBN 978-3-642-13650-4
Dressler, Falko ; Kapitza, Rüdiger ; Daum, Michael ; Strübe, Moritz ; Schröder-Preikschat, Wolfgang ; German, Reinhard ; Meyer-Wegener, Klaus: Query Processing and System-Level Support for Runtime-Adaptive Sensor Networks. In: Geihs, Kurt ; David, Klaus (Ed.) : Proc. of 16. GI/ITG Fachtagung Kommunikation in Verteilten Systemen ((KiVS 2009) Kassel, Germany March 2009). 2009, pp 55-66.
Pollner, Niko ; Daum, Michael ; Dressler, Falko ; Meyer-Wegener, Klaus: An Overlay Network for Integration of WSNs in Federated Stream-Processing Environments. In: IEEE (Ed.) : The 10th IFIP Annual Mediterranean Ad Hoc Networking Workshop (MedHocNet 2011 Favignana, Italien Juni 2011). 2011, pp 157-164.
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