Mobility-aware coordination in a WLAN hot-spot area

  • Authors:
  • Karin Anna Hummel

  • Affiliations:
  • Institute of Distributed and Multimedia Systems, University of Vienna, Vienna

  • Venue:
  • MATA'05 Proceedings of the Second international conference on Mobility Aware Technologies and Applications
  • Year:
  • 2005

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Abstract

Mobile computing is a natural further development of distributed computing enabled by wireless networks, portable devices, and recently wearable computers. Due to varying wireless network conditions while moving distributed computing is facing new challenges. In such scenarios, data space-based middleware offers promising mechanisms by supporting asynchronous coordination. However, reactive mechanisms provide no means to invoke operations which have to be started in advance, for example, before a mobile device looses connection. This paper makes use of the Mobility-Aware Coordination Layer approach (MobACL) which extends the concept of shared data spaces by means of proactive fault tolerance mechanisms. Mobility-awareness is achieved by monitoring current wireless link states and by predicting future wireless link states and retention periods based on mobility models. Experimental results are presented which demonstrate the potential for increasing coordination operation throughput by means of the MobACL and replication of processes for four well-known coordination patterns.