Research On Transmission Control Strategy Of Energy Harvesting Wireless Sensor Networks For Distributed Detection

Energy Harvesting Wireless Sensor Networks(EH-WSNs)have emerged to break the limitations of limited energy on the performance of Wireless Sensor Networks(WSNs)in distributed detection.Environmental energy provides the basis for the long-term operation of sensor networks and makes the design of EH-WSNs more focused on meeting the needs of distributed detection performance,but also faces the challenge of designing transmission control strategies.In this thesis,we explored and studied the transmission control strategy of EH-WSNs for distributed detection,in which the main contributions are as follows:(1)An adaptive transmission control strategy based on cross-layer design was proposed.A simulation model of EH-WSNs involving the physical layer,MAC layer and application layer was constructed around the distributed detection of parallel structures under fading channels,an adaptive transmission control strategy was proposed,and the average deflection coefficient of the fusion center was optimized using the interior point method.After simulation,the relationship between detection delay and average energy harvesting rate and average deflection coefficient was analyzed,and the strategies were compared and analyzed in the ROC curve.The advantages of the adaptive transmission control strategy in terms of detection performance and adaptability were verified.(2)A distributed detection-oriented EH-Leach strategy was proposed.Based on the topological fit between clustered routing and distributed detection,a research on the clustering strategy of EH-WSNs for distributed detection was carried out.Inspired by the Leach protocol and with reference to the energy-state-based Leach improvement strategy,we designed a threshold function for cluster head selection that takes into account the remaining energy of nodes,the energy consumption of reception and the energy consumption of detection,etc.The relationship between the number of rounds and the target detection ratio under different cluster head ratios was analyzed by MATLAB simulation,and the performance analysis was realized in several scenarios.Based on the comparative analysis of different scenarios and different performances,and combined with Monte Carlo simulation,it was found that the EH-Leach strategy has higher energy utilization and stronger adaptability compared with the Leach protocol.