Research On Key Technology Of Energy Cooperation In WBAN Based On Energy Harvesting

Wireless Body Area Network(WBAN)is developed on the basis of the Wireless Sensor Network(WSN)and it is a wireless network formed by the physiological information collection sensor of the human body.WBAN is not only suitable for diagnosis and treatment,health monitoring and early prevention solutions,but also an important part of the development of Internet of Things(IOT)technology.At present,the research on WBAN is still in the stage of development,the traditional research about WBAN mainly focuses on the establishment of the architecture and the design and build of the service platform,however,it is rarely involved in the energy harvesting of WBAN.For the particularity of WBAN application environment,the sustainable use of energy is an important challenge for human health monitoring equipment,so the key techniques for energy harvesting are necessary for the long-term development of WBAN,not only has the practical research significance but also has the broad application prospects.WBAN equipment is equipped with the energy source with limited energy,namely the battery with limited energy.Not only can the battery runs into a performance bottleneck,but it also runs out of energy over time,which limiting the sustainability of the service.In most scenarios,these batteries cannot be replaced because the sensor devices may be implanted and cannot easily replaced.By contrast,energy harvesting techniques can harvest energy from a range of infinite energy sources and convert them into usable electrical energy.Because energy harvesting is not restricted to a limited range or scope,but also energy can be obtained from infinite energy in a variety of ways,so it can be seen as a kind of prolonging the service life of the feasible wearable device solutions.Furthermore,energy harvesting can support real-time and continuous monitoring of various human body physiological parameters to form its own sustainable development system.Energy cooperation on the basis of energy collection can further realize the optimization of communication performance and achieve the rational and efficient utilization of energy.In this paper,we start with the energy efficiency problem of WBAN,then apply energy harvesting technology in WBAN,we research the energy harvesting and information transmission protocol and the energy cooperative harvesting then transmission mechanism based on energy harvesting in WBAN,which lays a foundation for further research on energy harvesting and energy cooperative in WBAN.The research ideas of this paper are as follows: Firstly,the energy harvesting and information transmission protocol of WBAN is designed,and the process of the energy harvesting and information transmission is modeled.Secondly,the maximization of information throughput is realized by optimizing the time-ratio and transmission power simultaneously.Finally,the energy cooperative communication model based on energy harvesting in WBAN between transmission and receiver is designed,which can realize the maximization of throughput by optimizing the energy conversion efficiency and energy harvesting rate,and the obvious advantages can be found in energy cooperation mechanism.The main work of this paper is as follows:First,energy harvesting technology is applied in WBAN for this paper,energy harvesting and information transmission model is established,energy harvesting and information transmission protocol in WBAN is designed,which aimed at formulating the distribution strategy about time and power allocation in the energy harvesting and information transmission.Second,in order to maximize the information throughput of the communication system,the distribution method of the time ratio and transmission power is derived.The optimal time ratio and optimal transmission power solution algorithm is proposed to overcome the limitation of traditional battery lifetime.Third,energy cooperation problem in WBAN based on energy harvesting is researched,a harvesting and transmission mechanism of energy cooperation is designed between transmission node and the receiving node in WBAN,the work of the model is introduced in this paper.Fourth,the energy cooperation harvesting and transmission mechanism is derived and the throughput of communication system is optimized under the energy harvesting,the performance of the energy cooperation harvesting and transmission mechanism on throughput is validated through the simulation experiments,which proved the effective way of improving communication performance is the energy cooperation between the actual harvesting equipment of the transmission node and receive node.In the above research,the sustainable work of the sensor is realized by the energy harvesting and information transmission scheme,which provided the foundation for the in-depth study of energy harvesting technology in WBAN.The energy cooperative harvesting and transmission mechanism based on energy harvesting realizes the optimization of communication performance and achieves the utilization of energy reasonably and efficiently.