Research In Motion
Many Wireless Sensor Networks (WSNs) are deployed in an unattended environment in which energy replenishment is impossible. Due to limited resources, a WSN must not only satisfy the application specific QoS requirements such as reliability, timeliness and security, but also minimize energy consumption to prolong the system useful lifetime. In the literature the trade-off between energy consumption v/s. reliability gains, with the goal to maximize the WSN system lifetime has been well explored. A Heterogeneous Wireless Sensor Networks (HWSNs) consists of two or more types of nodes. The redundancy management of various wireless sensor networks uses multipath routing to answer user queries in the presence of defective and malicious nodes.