Abstract:
Wireless sensor networks are composed of a number of sensors probing their surroundings and disseminating the collected data to a gateway node for processing. Numerous military and civil applications have emerged over the last few years for wireless sensor networks. In many of these applications, sensors and gateways are placed in harsh environments. Therefore, protecting snsors and the gateway is critical for ensuring the robustness of the network operation. Gateway relocation has been pursued as means for boosting network-related performance metrics, such as throughput and energy consumption. However, we argue that relocating without taking safety concerns into consideration may cause the gateway to move dangerously close to one or multiple serious events in the environment. In this paper, we present GRASP, a new algorithm for Gateway Relocation for Adaptive Safety and Performance requirements/goals. GRASP employs an evolutionary neural network to estimate the risk at the new proposed gateway position before the relocation process takes place. Our experimental validation results have demonstrated the effectiveness of GRASP.