Research On Cooperative Transmission Strategy Based On Energy Currency Mechanism In EH Cooperative Network

With the development of science and technology,the number of wireless communication devices has increased rapidly.How to use energy collection technology to provide energy for wireless communication equipment has become a research hotspot.At the same time,relay selection technology is the key technology of wireless cooperative communication system.The quality of relay selection is related to the performance of the whole system.Therefore,when the wireless cooperative communication system adopts energy collection technology,that is,for the wireless eh cooperative communication system,how to select relay nodes for cooperative transmission becomes a new research topic.To solve the above problems,this paper studies the cooperative transmission strategy based on the energy currency mechanism in the wireless eh cooperative communication system,as follows:(1)A wireless eh cooperative communication system model consisting of transmitting nodes,receiving nodes,multiple selfish relay nodes and unselfish relay nodes is established.In order to encourage selfish relay nodes to participate in the relay forwarding process,an energy currency is proposed to compensate and motivate them.When the transmitting node directly transmits data to the selfish relay node,the selfish relay node can use its own energy reserve to successfully forward the data,then exchange the energy currency from the transmitting node for more energy than its own contribution,and compensate the energy currency in different ways in an idle time slot after the current time slot communication task is completed.On this basis,the relevant processes of selfish relay node selection,energy currency compensation,incentive and exchange are improved,and three different relay selection strategies are proposed.Matlab simulation results verify that the relay selection strategy based on energy currency mechanism can help to reduce the system bit error rate and outage probability and improve the system energy efficiency.(2)Since the above relay selection strategy based on energy currency mechanism can't completely solve the energy supply problem of wireless eh cooperative communication system in the scenario of busy communication tasks,a cooperative transmission model based on the principle of energy priority is proposed in the wireless eh cooperative communication system.The energy threshold is set in the model to dynamically balance the energy status in the model.On this basis,combining the energy threshold condition with the energy currency mechanism,a cooperative transmission strategy based on the energy priority principle is formed,and a detailed simulation analysis is carried out.Matlab simulation results show that the proposed cooperative transmission strategy based on the principle of energy priority effectively solves the problem of system energy shortage in the scene of busy communication tasks,improves the overall performance of the system,and has positive application significance.