| The energy efficiency problem in wireless sensor networks has always been an important factor limiting the development of wireless sensor networks.When the sensor node is in a harsh environment or embedded in the human body,the node cannot connect to the grid or replace the battery,so that the life of the network is seriously restricted by the limited battery capacity of the node.How to conveniently power the nodes and extend the life of the wireless sensor network has become an issue that needs to be solved immediately.At present,domestic and foreign scholars have done a lot of research on energy harvesting technology,and a new kind of solution has paid extensive attention to the use of radio frequency signal energy in the environment around the node to recharge the node.Due to the limitation of the transmission channel,transmission power and transmission distance of the wireless sensor network,the energy collection technology faces many challenges in the information transmission problem.We join the relay cooperative network communication to help the source node send signals to the destination receiver in a reliable,efficient and stable protocol.Wireless sensor nodes are vulnerable to damage in the actual environment,affecting the hardware transceivers,and reducing the communication quality of the network.At present,there is less research in this direction,and it is necessary to obtain accurate network performance in consideration of the damage of the hardware of the node parameter.Therefore,it has a profound impact on the research of wireless information energy co-transmission network with node damage.Due to the limitation of the transmission channel,transmission power,transmission distance and damage of node hardware of the wireless sensor network,energy harvesting technology faces many challenges in information transmission.In order to solve the energy efficiency problem in the practical application of wireless sensor network,this paper proposes a node-damage-based wireless sensor network information energy transmission algorithm,which lays a foundation for future energy harvesting technology research in wireless sensor networks.The main research contents of this paper are as follows:Firstly,for the wireless sensor network topology,the physical phenomenon of node damage is introduced to model the wireless information energy simultaneous transmission network.Then,the best relay selection method is used to transmit information and collect energy of the radio frequency signal of the source node.Secondly,we introduce two relay cooperative communication models,compare and analyze the advantages and disadvantages of the two transmission methods,and point out the application of the two methods.The transmission theory of information energy simultaneous transmission is expounded by introducing the energy distribution relay protocol of time allocation and the energy collection relay protocol based on power allocation.In this paper,we establish the transmission mode of the wireless energy information simultaneous transmission network under different damage levels according to the two protocols,and derive the performance indicators of network communication,that is,reduce the network outage probability and improve the network throughput under the condition of high SNR.In the derivation process,the proposed algorithm isoptimized for this optimization goal.Thirdly,Finally,when the information energy is transmitted simultaneously,the time allocation transmission protocol and the energy distribution transmission protocol are used to theoretically deduct and study the communication performance index of the network.Finally,we analyze and verify the theoretical model through MATLAB simulation.Simulation analysis of node damage is of great significance to engineering practice.We give the optimal parameters and protocol selection of the network.The simulation proves the validity and achievability of our algorithm analysis,which lays a foundation for future research. |
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