Fault Node Recovery Algorithm for a Wireless Sensor Network.

This paper proposes a fault node recovery (FNR) algorithm to enhance the lifetime of a wireless sensor network (WSN) when some of the sensor nodes shut down, either because they no longer have battery energy or they have reached their operational threshold. Using the FNR algorithm can result in fewer replacements of sensor nodes and more reused routing paths. Thus, the algorithm not only enhances the WSN lifetime but also reduces the cost of replacing the sensor nodes. The traditional approaches to sensor network routing include the directed diffusion (DD) [9] algorithm and the grade diffusion (GD) lgorithm. The algorithm proposed in this paper is based on the GD algorithm, with the goal of replacing fewer sensor nodes that are inoperative or have depleted batteries, and of reusing the maximum number of
routing paths. These optimizations will ultimately enhance the
WSN lifetime and reduce sensor node replacement cost.

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