CFlood: A Constrained Flooding Protocol for Real-time Data Delivery in Wireless Sensor Networks

  • Authors:

  • Bo Jiang;Binoy Ravindran;Hyeonjoong Cho

  • Affiliations:

  • Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA 24061;Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA 24061;Department of Computer and Information Science, Korea University, Seoul, Korea 136-701

  • Venue:
  • SSS '09 Proceedings of the 11th International Symposium on Stabilization, Safety, and Security of Distributed Systems
  • Year:
  • 2009

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Abstract

Real-time performance is critical for many time-sensitive applications of wireless sensor networks. We present a constrained flooding protocol, called CFlood, which enhances the deadline satisfaction ratio per unit energy consumption of time-sensitive packets in sensor networks. CFlood improves real-time performance by flooding, but effectively constrains energy consumption by controlling the scale of flooding, i.e., flooding only when necessary. If unicasting meets the distributed sub-deadline of a hop, CFlood aborts further flooding even after flooding has occurred in the current hop. Our simulation-based experimental studies show that CFlood achieves higher deadline satisfaction ratio per unit energy consumption than previous multipath forwarding protocols, especially in sparsely deployed or unreliable sensor network environments.