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| A Novel Directed Diffusion Mechanism for Wireless Sensor Networks |
| Ren Biao①; Liu Li-feng①; Ma Jian② |
| ①State Key Lab of Networking and Switching, Beijing Univ. of Posts & Telecommunications, Beijing 100876, China; ② Nokia(Beijing) Research Center, Beijing 100013, China |
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Abstract Directed diffusion is a classical data propagation protocol for wireless sensor networks. In directed diffusion routing, the diffusion of exploratory data can inevitably lead to heavy traffic periodically. Then the performance of data propagation may severely deteriorate at that moment. A gradient-based constrained diffusion algorithm is proposed in this paper. By analyzing the gradients of node’s neighbors, the breadth and depth for diffusion can be conducted firstly. Then diffusion is performed in the optimal set of selected forwarding nodes. The simulation results indicate that this algorithm can decrease both duration of diffusion and propagation delay greatly. In addition, it is energy-efficient, and compatible with existing algorithm without additional cost of control message.
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Received: 10 January 2005
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2006, Vol. 28 
