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Abstract: |
One of the most fundamental purposes of sensing information is to immediately respond to any anomalies. In order to make an accurate and cognizant decision, there is a great need for a dependable wireless sensor network. Failure dependability relates to providing dependability against node and/or link failures. In multi-layered wireless sensor networks with data fusion, we observe that as the data propagates from the sensor node to the sink, the data packet represents an increasing number of sensor nodes (sub-tree) in the network. Hence, it is critical that this data packet reaches the sink, since the loss of a single packet eliminates the information sensed by a whole (possibly large) sub-tree of sensor nodes. We evaluate two dual-homed routing techniques for providing fault-tolerance, namely 1+1 dual-homing and 1:1 dual homing. Based on extensive simulation results, we observe that 1:1 dual-homed routing minimizes packet loss, increases network throughput, and increases network lifetime compared to the 1+1 dual-homed routing and the traditional single-homed routing techniques. |
